KR20130071148A - Method for operating an image display apparatus - Google Patents

Abstract

The present invention relates to a method of operating an image display apparatus, and the method of operating an image display apparatus according to an embodiment of the present invention includes extracting a partial region of an image, and detecting text included in the extracted region. And storing the detected text in a channel table.

Description

Method for operating an image display apparatus

The present invention relates to an image display apparatus and an operation method thereof, and more particularly, to an image display apparatus and an operation method that can provide an efficient channel information collection and channel switching method.

A video display device is a device having a function of displaying an image that a user can view. The user can view the broadcast through the video display device. A video display device displays a broadcast selected by a user among broadcast signals transmitted from a broadcast station on a display. Currently, broadcasting is shifting from analog broadcasting to digital broadcasting worldwide.

Digital broadcasting refers to broadcasting in which digital video and audio signals are transmitted. Digital broadcasting is more resistant to external noise than analog broadcasting, so it has less data loss, is advantageous for error correction, has a higher resolution, and provides a clearer picture. Also, unlike analog broadcasting, digital broadcasting is capable of bidirectional service.

An object of the present invention is to provide an image display apparatus and an operation method thereof that can provide an efficient channel information collection and channel switching method.

In addition, another object of the present invention is to provide an image display apparatus and an operation method thereof that can improve user convenience.

According to an aspect of the present invention, there is provided a method of operating an image display apparatus, including extracting a partial region of an image, detecting text included in the extracted region, and channeling the detected text. (channel) storing in a table.

In addition, the operation method of the image display apparatus according to an embodiment of the present invention for achieving the above object, receiving a voice signal, searching for a channel corresponding to the data based on the voice signal in the channel table and the search results Channel switching based on the switching.

According to the embodiment of the present invention, it is possible to provide an efficient channel information collection and channel switching method, it is possible to improve the convenience of the user.

1 is a block diagram illustrating an image display apparatus according to an exemplary embodiment of the present invention.
FIG. 1 is an internal block diagram of a channel browsing processor of FIG. 1.
3 is an internal block diagram of the control unit of FIG.
4A to 4B are diagrams illustrating various examples of a platform structure diagram of the image display device of FIG. 1.
5 is a diagram illustrating a control method of the remote controller of FIG. 1.
6 is a perspective view of a remote control apparatus according to an embodiment of the present invention.
7 is an internal block diagram of a remote control apparatus according to an embodiment of the present invention.
8 is a flowchart illustrating a method of operating an image display apparatus according to an exemplary embodiment of the present invention.
9 to 15 are views for explaining various examples of the operation method of the image display apparatus of FIG. 8.
16 is a flowchart illustrating a method of operating an image display apparatus according to an exemplary embodiment of the present invention.
17 is a diagram illustrating a platform structure according to an embodiment of the present invention.

Hereinafter, with reference to the drawings will be described the present invention in more detail.

The suffix "module" and " part "for components used in the following description are given merely for convenience of description, and do not give special significance or role in themselves. Accordingly, the terms "module" and "part" may be used interchangeably.

On the other hand, the video display device described in the present specification is an intelligent video display device that adds a computer support function to the broadcast reception function, and is faithful to the broadcast reception function, but with the addition of the Internet function, the handwriting type input device, touch screen or It can be equipped with a more convenient interface such as a 3D pointing device. In addition, by being connected to the Internet and a computer with the support of a wired or wireless Internet function, it is possible to perform functions such as e-mail, web browsing, banking or gaming. A standardized general-purpose OS can be used for these various functions.

That is, since various applications can be freely added or deleted on the general-purpose OS kernel, the video display device described in the present invention can perform various user-friendly functions. For example, it may be a smart TV.

1 is a block diagram illustrating an image display apparatus according to an exemplary embodiment of the present invention.

Referring to FIG. 1, the image display apparatus 100 according to an exemplary embodiment of the present invention may include a tuner unit 110, a network interface unit 130, an external device interface unit 135, a storage unit 140, and a user. It may include an input interface unit 150, a channel browsing processor 160, a controller 170, a display 180, an audio output unit 185, and a power supply unit (not shown).

On the other hand, according to the embodiment may further include an analog-to-digital converter 190.

The tuner 110, the demodulator 120, and the network interface 130 may configure a broadcast receiver. In addition, the video display device 100 may be provided with the tuner 110 and the demodulator 120 and the network interface 130, optionally.

The tuner unit 110 may select an RF broadcast signal corresponding to a channel selected by a user or all pre-stored channels among RF (Radio Frequency) broadcast signals received through an antenna. In addition, the selected RF broadcast signal may be converted into an intermediate frequency signal or a baseband video or audio signal.

The tuner unit 110 may include a plurality of tuners, for example, a first tuner 111 and a second tuner 112.

The first tuner 111 selects an RF broadcast signal corresponding to a channel selected by a user from among RF (Radio Frequency) broadcast signals received through an antenna and converts the selected RF broadcast signal into an intermediate frequency signal or a baseband video / audio. Convert to a signal. For example, if the selected RF broadcast signal is a digital broadcast signal, it is converted into a digital IF signal DIF1, and if it is an analog broadcast signal, it is converted into an analog baseband video / audio signal CVBS 1 / SIF. That is, the first tuner 111 may be a hybrid tuner capable of processing digital broadcast signals and analog broadcast signals. The analog baseband video / audio signal CVBS 1 / SIF output from the first tuner 111 may be directly input to the controller 170.

In addition, as described below, the first tuner 111 receives an RF broadcast signal of a single carrier according to an Advanced Television Systems Committee (ATSC) scheme or an RF broadcast signal of a plurality of carriers according to a digital video broadcasting (DVB) scheme. It is also possible.

Similar to the first tuner 111, the second tuner 112 selects an RF broadcast signal corresponding to a channel selected by a user from among RF (Radio Frequency) broadcast signals received through an antenna and selects the selected RF broadcast signal. Converts to an intermediate frequency signal or a baseband video / audio signal.

Meanwhile, the second tuner 112 sequentially and periodically selects corresponding RF broadcast signals of all broadcast channels stored through the channel memory function among the RF broadcast signals received through the antenna in the present invention, and the intermediate frequency signal. Alternatively, it can be converted to a baseband video / audio signal. In an embodiment of the present invention, since images of other pre-stored channels are also shown in thumbnail form on at least part of the screen, it is possible to sequentially / periodically receive RF broadcast signals of all pre-stored channels.

For example, the first tuner 111 converts the main RF broadcast signal selected by the user into an intermediate frequency signal or a baseband video / audio signal, and the second tuner 112 controls all except the main RF broadcast signal. It is possible to select the RF broadcast signal (sub RF broadcast signal) or all the RF broadcast signals sequentially and periodically, and convert them to intermediate frequency signals or baseband video / audio signals.

The demodulator 120 receives the digital IF signal DIF converted by the tuner 110 and performs a demodulation operation.

The demodulator 120 may output a stream signal TS after performing demodulation and channel decoding. At this time, the stream signal may be a signal in which a video signal, a voice signal, or a data signal is multiplexed.

The stream signal output from the demodulator 120 may be input to the controller 170. The control unit 170 performs demultiplexing, video / audio signal processing, and the like, and then outputs an image to the display 180 and outputs audio to the audio output unit 185.

The demodulator 120 may include a plurality of demodulators, for example, a first demodulator 121 and a second demodulator 122.

The first demodulator 121 may perform demodulation and channel decoding and output a stream signal TS 1. The stream signal TS 1 at this time may be a signal multiplexed with a video signal, an audio signal and a data signal.

The stream signal TS1 is input to the controller 170 to perform demultiplexing, signal processing, and the like. In the exemplary embodiment of the present invention, before inputting to the control unit 170, input to the channel browsing processing unit 160 to perform a process for channel browsing. Channel browsing operations will be described later.

The second demodulator 122 receives the digital IF signal DIF 2 converted by the second tuner 112, performs a demodulation operation, and outputs a stream signal TS 2. The operation of the second demodulator 122 is omitted with reference to the operation of the first demodulator 121 described above.

On the other hand, when the signal output from the second tuner 112 is an analog baseband video signal CVBS 2, it is necessary to convert the analog / digital converter 190 into a digital signal.

The analog / digital converter 190 converts an input analog signal into a digital signal. When the input signal is an image signal, sampling and quantization may be performed and converted into a digital image signal DV. The converted digital signal may be an uncoded signal. The converted digital image signal DV is input to the channel browsing processor 160 to be processed.

The external device interface unit 135 may connect the external device to the image display device 100. To this end, the external device interface unit 135 may include an A / V input / output unit (not shown) or a wireless communication unit (not shown).

The external device interface unit 135 may be connected to an external device such as a DVD (Digital Versatile Disk), Blu-ray (Blu ray), a game device, a camera, a camcorder, a computer (laptop), a set top box, or the like by wire / wireless. It may also perform input / output operations with external devices.

The A / V input / output unit can receive video and audio signals from an external device. Meanwhile, the wireless communication unit can perform short-range wireless communication with other electronic devices.

The network interface unit 130 provides an interface for connecting the image display apparatus 100 to a wired / wireless network including an internet network. For example, the network interface unit 130 may receive content or data provided by the Internet or a content provider or a network operator through a network.

Meanwhile, the network interface unit 130 may access a predetermined web page through a connected network or another network linked to the connected network. That is, by accessing a predetermined web page through the network, it is possible to send or receive data with the server. In addition, content or data provided by a content provider or a network operator may be received.

In addition, the network interface unit 130 may select and receive a desired application from among applications that are open to the public through the network.

Meanwhile, unlike FIG. 1, a signal received through the network interface unit 130 or the external device interface unit 135 is transmitted to the channel browsing processor 160 or through the channel browsing processor 160 to the controller 170. Can be entered.

The storage 140 may store a program for processing and controlling each signal in the controller 170, or may store a signal processed video, audio, or data signal.

In addition, the storage 140 may perform a function for temporarily storing an image, audio, or data signal input from the external device interface 135 or the network interface 130. In addition, the storage 140 may store information on a predetermined broadcast channel through a channel storage function.

In addition, the storage 140 may store an application or a list of applications input from the external device interface 135 or the network interface 130.

In addition, the storage 140 may store the platform of FIGS. 4A and 4B described later.

The image display apparatus 100 may reproduce and provide a content file (video file, still image file, music file, document file, application file, etc.) stored in the storage 140 to a user.

1 illustrates an embodiment in which the storage unit 140 is provided separately from the control unit 170, but the scope of the present invention is not limited thereto. The storage unit 140 may be included in the control unit 170.

The user input interface unit 150 transmits a signal input by the user to the control unit 170 or a signal from the control unit 170 to the user.

(Not shown), such as a power key, a channel key, a volume key, and a set value, from the remote control apparatus 200, (Not shown) that senses a user's gesture to the control unit 170 or transmits a signal from the control unit 170 to the control unit 170 It is possible to transmit it to the sensor unit (not shown).

The channel browsing processor 160 may perform a browsing process on at least one of the received broadcast signal and various input video signals. In detail, the demodulator 120 receives the demodulated and decoded stream signal TS 1 or TS 2, receives the stream signal from the interface 130, 135, or the analog / digital converter 190. Based on the video signal including the extracted digital signal DV, demultiplexing the stream signal TS 1 or TS 2, extracting some of the demultiplexed video signals, and including the extracted video signal. The new stream signal TSa can be output by multiplexing the result. For example, the stream signal TSa or TSb may be MPEG 2 TS.

In addition, the channel browsing processor 160 may output the main stream signal TSb corresponding to the main video signal displayed in the main area among the video signals displayed on the display 180 without any additional processing, and displays the display ( The sub stream signal TSa corresponding to the sub video signal displayed in the sub region among the video signals displayed on 180 may be output by performing channel browsing processing as described above.

In the exemplary embodiment of the present invention, when the channel list is displayed on the display 180 by extracting a partial image of the broadcast signal of the plurality of channels through the channel browsing processor 160 and re-coding the stream in the form of a stream, the broadcast signal of the multiple channel At least a part of the image may be displayed on a screen in a thumbnail form. Accordingly, the user can intuitively know the contents broadcast in the other channel.

When the channel browsing processor 160 extracts some images of various external input images input through the external signal input unit 128 and re-encodes them in a stream form, the channel browsing processor 160 displays a plurality of external input lists on the display 180. At least a part of the external input image from the external input device may be displayed on the screen in the form of a thumbnail. Accordingly, the user can intuitively know the content input from the external input device.

Meanwhile, the channel browsing processor 160 extracts the broadcast signal image of the above-described channel and the partial image of the above-described external input image and re-encapsulates the image in a stream form to display the channel list and the external input list on the display 180. In this case, at least a part of a broadcast signal image of a plurality of channels and an external input image from a plurality of external input devices may be displayed on a screen in a thumbnail form. Accordingly, the user can intuitively know the contents input from the plurality of channels and the external input device.

The channel browsing processor 160 will be described later with reference to FIG. 2.

The controller 170 demultiplexes the input stream or processes the demultiplexed signals through the tuner unit 110, the demodulator 120, or the external device interface unit 135 to output an image or an audio signal. Signals can be generated and output.

The video signal processed by the controller 170 may be input to the display 180 and displayed as an image corresponding to the video signal. The video signal processed by the controller 170 may be input to the external output device through the external device interface 135. [

The audio signal processed by the control unit 170 may be output to the audio output unit 185 through audio. In addition, the voice signal processed by the controller 170 may be input to the external output device through the external device interface unit 135.

Although not shown in FIG. 1, the controller 170 may include a demultiplexer, an image processor, and the like. This will be described later with reference to FIG.

In addition, the control unit 170 can control the overall operation in the video display device 100. [ For example, the controller 170 may control the tuner 110 to control the tuner 110 to select an RF broadcast corresponding to a channel selected by a user or a pre-stored channel.

In addition, the controller 170 may control the image display apparatus 100 by a user command or an internal program input through the user input interface unit 150. In particular, the user can access a network and download a list of applications or applications desired by the user to the video display device 100.

For example, the control unit 170 controls the tuner unit 110 to input a signal of a selected channel according to a predetermined channel selection command received through the user input interface unit 150. Then, video, audio, or data signals of the selected channel are processed. The controller 170 may output the channel information selected by the user together with the processed video or audio signal through the display 180 or the audio output unit 185.

As another example, the controller 170 may receive an external device image playback command received through the user input interface unit 150 from an external device, for example, a camera or a camcorder, input through the external device interface unit 135. The video signal or the audio signal may be output through the display 180 or the audio output unit 185.

Meanwhile, the control unit 170 may control the display 180 to display an image. In this case, the image displayed on the display 180 may be a still image or a video, and may be a 2D image or a 3D image.

Meanwhile, the controller 170 may generate a 3D object for a predetermined 2D object among the images displayed on the display 180, and display the 3D object. For example, the object may be at least one of a connected web screen (newspaper, magazine, etc.), EPG (Electronic Program Guide), various menus, widgets, icons, still images, moving images, and text.

Such a 3D object may be processed to have a different depth than the image displayed on the display 180. [ Preferably, the 3D object may be processed to appear protruding from the image displayed on the display 180.

On the other hand, the control unit 170 can recognize the position of the user based on the image photographed from the photographing unit (not shown). For example, the distance (z-axis coordinate) between the user and the image display apparatus 100 can be grasped. In addition, the x-axis coordinate and the y-axis coordinate in the display 180 corresponding to the user position can be grasped.

On the other hand, when entering the application viewing item, the control unit 170 can control to display a list of applications or applications that can be downloaded from the video display device 100 or from an external network.

The controller 170 may control to install and run an application downloaded from an external network along with various user interfaces. In addition, by selecting a user, an image related to an executed application may be controlled to be displayed on the display 180.

The controller 170 may control to install and run an application downloaded from an external network along with various user interfaces. An image related to an executed application may be controlled to be displayed on the display 180.

Meanwhile, the controller 170 may control to display an input window for inputting a search word. The input window may be displayed in an area different from the image displayed on the display 180, or may be overlaid on the image. Can be.

The display 180 converts an image signal, a data signal, an OSD signal processed by the controller 170, or an image signal, data signal, etc. received from the external device interface unit 135 into R, G, and B signals, respectively. Generate a signal.

The display 180 may be a PDP, an LCD, an OLED, a flexible display, or a 3D display.

Meanwhile, the display 180 may be configured as a touch screen and used as an input device in addition to the output device.

The audio output unit 185 receives the signal processed by the control unit 170 and outputs it as a voice.

A photographing unit (not shown) photographs the user. The photographing unit (not shown) may be implemented by a single camera, but the present invention is not limited thereto, and may be implemented by a plurality of cameras. On the other hand, the photographing unit (not shown) may be embedded in the image display device 100 on the upper side of the display 180 or may be disposed separately. The image information photographed by the photographing unit (not shown) may be input to the control unit 170.

The control unit 170 can detect the gesture of the user based on each of the images photographed from the photographing unit (not shown) or the signals sensed from the sensor unit (not shown) or a combination thereof.

The power supply unit (not shown) supplies the corresponding power throughout the image display apparatus 100. Particularly, it is possible to supply power to a control unit 170 that can be implemented in the form of a system on chip (SOC), a display 180 for displaying an image, and an audio output unit 185 for audio output have.

To this end, the power supply unit (not shown) may include a converter (not shown) for converting AC power into DC power. On the other hand, for example, when the display 180 is implemented as a liquid crystal panel having a plurality of backlight lamps, it may further include an inverter (not shown) capable of PWM operation for variable luminance or dimming driving have.

The remote control apparatus 200 transmits the user input to the user input interface unit 150. [ To this end, the remote control apparatus 200 may use RF (Radio Frequency) communication, infrared (IR) communication, Bluetooth, Bluetooth (UWB), ZigBee (ZigBee) method and the like.

In addition, the remote control apparatus 200 may receive an image, an audio or a data signal output from the user input interface unit 150, display it on the remote control apparatus 200 or output an audio or vibration.

On the other hand, the remote control device 200 can transmit the coordinate information corresponding to the motion of the remote control device 200 to the video display device 100. [ Thus, a pointer corresponding to the motion of the remote control apparatus 200 can be displayed on the display of the image display apparatus. As such, since the corresponding pointer is moved and displayed according to the movement in the 3D space, this may be referred to as a 3D pointing device.

Meanwhile, the video display device 100 may be a digital broadcast receiver capable of receiving a fixed or mobile digital broadcast.

Meanwhile, the video display device described in the present specification can be applied to a TV set, a monitor, a mobile phone, a smart phone, a notebook computer, a digital broadcasting terminal, a PDA (personal digital assistant), a portable multimedia player (PMP) And the like.

Meanwhile, the block diagram of the image display apparatus 100 shown in FIG. 1 is a block diagram for an embodiment of the present invention. Each component of the block diagram may be integrated, added, or omitted according to the specifications of the image display apparatus 100 actually implemented. That is, two or more constituent elements may be combined into one constituent element, or one constituent element may be constituted by two or more constituent elements, if necessary. In addition, the functions performed in each block are intended to illustrate the embodiments of the present invention, and the specific operations and apparatuses do not limit the scope of the present invention.

The image display apparatus 100 is an example of an image signal processing apparatus which performs signal processing of an image stored in an apparatus or an input image. As another example of the image signal processing apparatus, the set top box without the display 180 and the audio output unit 185 shown in FIG. 1, the above-described DVD player, Blu-ray player, game device, computer, etc. may be further illustrated. have.

FIG. 2 is an internal block diagram of the channel browsing processor of FIG. 1.

Referring to the drawings, the channel browsing processor 160 includes a switch 165, a demultiplexer 161, a picture decoder 166, a DV decoder 167, a format converter 162, and an image encoder 163. ), Stream encoder 164.

The switch 165 selects one of the plurality of input streams TS 1 and TS 2 and outputs it as it is (TSb) without a separate conversion operation to the main stream, and transfers the remaining streams to the demultiplexer 161. . The main stream corresponds to the main video signal, and the main video signal is displayed in most areas on the display 180. The other sub streams transmitted to the demultiplexer 161 correspond to sub image signals other than the main channel, and the sub image signals may be displayed in some regions of the display 180.

This method may be performed in correspondence with the quick view function of the “video channel list” showing the channel list only in a part of the display 180 instead of the entire area. This may be performed when the list is displayed on the display 180. Also, the list may be performed when the channel list and the external input list are displayed together on the display 180.

The demultiplexer 161 may demultiplex the received stream signal TS1 or TS 2 and separate them into a video signal, an audio signal, and a data signal, respectively. The video signal among the separated signals is transferred to the picture decoder 166, and other audio and data signals may be transferred to the stream encoder 164 to form a new stream.

The picture decoder 166 decodes at least a portion of the video signal which is demultiplexed and input. Decoding may be performed by an MPEG 2, MPEG-4 or H.264 decoder or the like. The decoded image may be a still image or a moving image. For example, the picture decoder 166 may decode an image of an I picture among the input video signals, or decode some sections of the input video signals.

The DV decoder 167 receives a digital signal DV converted by the analog / digital converter 190 to obtain a digital image.

The format converter 162 converts the format of the video signal input from the picture decoder 166 or the DV decoder 167. For example, the magnitude (resolution) of the input video signal may be converted. This size conversion is performed such that when shown in thumbnail form on the display 180, it is shown at an appropriate size.

Meanwhile, the format converter 162 may convert the video signal into different sizes according to the simple view of the "video channel list" and the entire view of the "video channel list". For example, the size of the image shown in thumbnail form in the entire view of the "image channel list" may be larger than the simple view of the "image channel list". The above-described simple view and full view function may be performed even when the external input list is displayed on the display 180 in addition to the channel list. In addition, the channel list and the external input list may be displayed together on the display 180.

The video encoder 163 encodes the video signal converted by the format converter 162. For example, the image size-converted by the format converter 162 may be encoded in JPEG or MPEG-2. The still image or video encoded by the image encoder 163 may be displayed in the form of a thumbnail on the display 180 in the future.

The stream encoder 164 encodes a stream based on the image encoded by the image encoder 163. That is, the image encoded by the image encoder 163, the demultiplexed audio signal by the demultiplexer 161, and The re-encoding may be performed based on the data signal The re-encoding may be performed by a multiplexing scheme The encoded stream may be in the form of MPEG 2 TS.

In the exemplary embodiment of the present invention, the channel browsing processing unit 160 extracts and re-encodes at least some of the broadcast signal image and the external input image of the plurality of channels to display the “channel list view” or “external input list view”. At least a portion of the plurality of channel broadcast signal images and the external input images from the plurality of external input devices may be displayed on the screen in thumbnail form. Accordingly, the user can intuitively know the content broadcast on another channel or the content input from the external input device.

3 is an internal block diagram of the controller of FIG. 1.

Referring to the drawings, the control unit 170 according to an embodiment of the present invention, the demultiplexer 310, the image processor 320, the OSD generator 340, the mixer 350, the frame rate converter 355 ), And a formatter 360. A voice processing unit (not shown), and a data processing unit (not shown).

The demultiplexer 310 demultiplexes the input stream. For example, when an MPEG-2 TS is input, it can be demultiplexed into video, audio, and data signals, respectively. Here, the stream signal input to the demultiplexer 310 may be a stream signal output from the tuner 110, the demodulator 120, or the external device interface unit 135.

The image processor 320 may perform image processing of the demultiplexed image signal. For this, the image processing unit 320 may include a video decoder 325 and a scaler 335.

The video decoder 325 decodes the demultiplexed video signal and the scaler 335 performs scaling so that the resolution of the decoded video signal can be output from the display 180.

The video decoder 325 can include a decoder of various standards.

On the other hand, the video signal decoded by the image processor 320 is input to the mixer 350.

The processor 330 may control the overall operation in the image display apparatus 100 or in the control unit 170. [ For example, the processor 330 may control the tuner 110 to select a channel selected by the user or an RF broadcast corresponding to a previously stored channel.

In addition, the processor 330 may control the image display apparatus 100 by a user command or an internal program input through the user input interface unit 150. [

In addition, the processor 330 may perform data transfer control with the network interface unit 135 or the external device interface unit 130.

The processor 330 may control operations of the demultiplexing unit 310, the image processing unit 320, the OSD generating unit 340, and the like in the controller 170.

The OSD generator 340 generates an OSD signal according to a user input or itself. For example, a signal for displaying various types of information on a screen of the display 180 as a graphic or text may be generated based on a user input signal or a control signal. The generated OSD signal may include various data such as a user interface screen of the video display device 100, various menu screens, a widget, and an icon.

For example, the OSD generator 340 may generate a signal for displaying broadcast information based on subtitles or EPGs of a broadcast image.

The mixer 350 may mix the OSD signal generated by the OSD generator 340 and the decoded image signal processed by the image processor 220. The mixed signal is provided to the formatter 360. Since the decoded broadcast video signal or the external input signal and the OSD signal are mixed, the OSD may be overlaid and displayed on the broadcast video or the external input video.

The frame rate converter (FRC) 355 may convert the frame rate of the input video. On the other hand, the frame rate converter 350 can output the frame rate without conversion.

The formatter 360 receives the output signal of the frame rate converter 355 and changes the format of the signal to be suitable for the display 180 and outputs the signal. For example, the R, G, and B data signals may be output as low voltage differential signaling (LVDS) signals or mini-LVDS signals.

The formatter 360 may change the format of the 3D video signal or convert the 2D video into a 3D video.

Although not shown in the drawing, it is also possible that a 3D processor (not shown) for 3-dimensional effect signal processing is further disposed after the formatter 360. The 3D processor (not shown) can process the brightness, tint, and color of the image signal to improve the 3D effect. For example, it is possible to perform signal processing such as making the near field clear and the far field blurring. On the other hand, the functions of such a 3D processor can be merged into the formatter 360 or merged into the image processing unit 320. [

On the other hand, the audio processing unit (not shown) in the control unit 170 can perform the audio processing of the demultiplexed audio signal. To this end, the voice processing unit (not shown) may include various decoders.

In addition, the audio processing unit (not shown) in the control unit 170 can process a base, a treble, a volume control, and the like.

The data processing unit (not shown) in the control unit 170 can perform data processing of the demultiplexed data signal. For example, if the demultiplexed data signal is a coded data signal, it can be decoded. The encoded data signal may be EPG (Electronic Program Guide) information including broadcast information such as a start time and an end time of a broadcast program broadcasted on each channel.

Meanwhile, the block diagram of the controller 170 shown in FIG. 3 is a block diagram for an embodiment of the present invention. Each component of the block diagram can be integrated, added, or omitted according to the specifications of the control unit 170 actually implemented.

In particular, the frame rate converter 350 and the formatter 360 are not provided in the controller 170, but may be separately provided.

4A to 4B are diagrams illustrating various examples of a platform structure diagram of the image display device of FIG. 1.

The platform of the video display device 100 according to the embodiment of the present invention may include OS-based software to perform various operations as described above.

First, referring to FIG. 4A, the platform of the image display apparatus 100 according to another exemplary embodiment of the present invention is a detachable platform, in which a legacy system platform 400 and a smart system platform 405 are separated. Can be designed. The OS kernel 410 can be commonly used in the legacy system platform 400 and the smart system platform 405.

The legacy system platform 400 may include a driver 420, a middleware 430, an application layer 450 on the OS kernel 410, and the smart system platform 405. May include a library 435, a framework 440, and an application layer 455 on the OS kernel 410.

The OS kernel 410 is a core of an operating system and can be used to drive hardware drivers, security of hardware and a processor in the video display device 100, efficient management of system resources, Management, provision of an interface to hardware by hardware abstraction, multi-process, and schedule management according to multi-process. Meanwhile, the OS kernel 410 may further provide power management and the like.

The hardware driver in the OS kernel 410 may include at least one of a display driver, a Wi-Fi driver, a Bluetooth driver, a USB driver, an audio driver, a Power management, a Binder driver, .

The hardware driver in the OS kernel 410 is a driver for a hardware device in the OS kernel 410 and includes a character device driver, a block device driver, and a network device driver dirver. Since a block device driver transfers data in units of specific blocks, a buffer for storing a unit size may be required. The character device driver may transmit a basic data unit, i.e., a character unit, so that a buffer may not be needed.

The OS kernel 410 may be implemented in various operating system (OS) based kernels such as UNIX based (Linux) and Windows based. The OS kernel 410 is an open OS kernel, and can be general-purpose which can be used in other electronic devices.

The driver 420 is located between the OS kernel 410 and the middleware 430 and drives the device along with the middleware 430 for operation of the application layer 450. For example, the driver 420 may include a microcomputer, a display module, a graphics processing unit (GPU), a frame rate conversion unit (FRC), a general purpose input / output pin (GPIO) A driver such as HDMI, SDEC (System Decoder or Demultiplexer), VDEC (Video Decoder), ADEC (Audio Decoder), PVR (Personal Video Recorder), or I2C (Inter-Integrated Circuit) . These drivers operate in conjunction with hardware drivers in the OS kernel 410. [

In addition, the driver 420 may further include a driver of the remote control apparatus 200, particularly, a 3D pointing device to be described later. The driver of the 3D pointing device may be provided in various ways in the OS kernel 410 or the middleware 430 in addition to the driver 420.

The middleware 430 is located between the OS kernel 410 and the application layer 450 and can serve as intermediary between other hardware or software to exchange data. Thus, it is possible to provide a standardized interface, various environment support, and system can interoperate with other tasks.

Examples of the middleware 430 in the legacy system platform 400 may be middleware of MHEG (Multimedia and Hypermedia information Coding Experts Group) and ACAP (Advanced Common Application Platform) which are data broadcasting related middleware. Or SI middleware, and peripheral communication related middleware DLNA middleware.

The application layer 450 on the middleware 430, that is, the application 450 layer in the legacy system platform 400 can be configured to display, for example, a user interface application for various menus and the like in the video display device 100 . The application layer 450 on this middleware 430 may be editable by the user's choice and may be updated over the network. By using the application layer 450, it is possible to enter a desired menu among various user interfaces according to the input of the remote control apparatus 200 while watching a broadcast image.

The application layer 450 within the legacy system platform 400 may also include at least one of a TV guide application, a Bluetooth application, a reservation application, a Digital Video Recorder (DVR) application, .

Meanwhile, the library 435 in the smart system platform 405 is located between the OS kernel 410 and the framework 440, and can form the basis of the framework 440. For example, the library 435 may include a security-related library, SSL (Secure Socket Layer), a web engine-related library, WebKit, libc (c library), a video format, an audio format, and the like. The media framework, which is a media related library, may be included. Such a library 435 may be written on a C or C ++ basis. It can also be exposed to the developer through the framework 440.

The library 435 may include a runtime 437 having a core Java library and a virtual machine (VM). This runtime 437 forms the basis of the framework 440 along with the library 435.

The virtual machine (VM) can be a plurality of instances, that is, a virtual machine that can perform multitasking. On the other hand, each virtual machine (VM) may be allocated and executed in accordance with each application in the application layer 455, at which time a binder (not shown) in the OS kernel 410, for scheduling or inter- Binder) driver (not shown) may be operated.

Meanwhile, the binder driver and the runtime 437 can connect a Java-based application and a C-based library.

On the other hand, the library 435 and the runtime 437 can correspond to the middleware of the legacy system.

Meanwhile, the framework 440 in the smart system platform 405 includes a program on which the application in the application layer 455 is based. The framework 440 may be compatible with any application and may reuse, move, or exchange components. The framework 440 may include a support program, a program for weaving other software components, and the like. For example, a resource manager, an activity manager associated with an activity of an application, a notification manager, a content provider that summarizes shared information between applications, and the like . Such a framework 440 can be created based on Java (JAVA).

The application layer 455 on the framework 440 includes various programs that can be displayed and driven in the video display device 100. [ For example, a Core Application having at least one of an email, a short message service (SMS), a calendar, a map, a browser, etc. . This application layer 450 may be created on a Java (JAVA) basis.

In addition, the application layer 455 includes an application 465 that is stored in the image display device 100 and can not be deleted by a user, an application 465 that is downloaded and stored through an external device or a network, 475).

(VOD) service, a web album service, a social networking service (SNS), a location-based service (LBS), a map service, a web search Service, an application search service, and the like may be performed. In addition, various functions such as game and schedule management can be performed.

Next, referring to FIG. 4B, the platform of the image display apparatus 100 according to an embodiment of the present invention is an integrated platform, including an OS kernel 510, a driver 520, and middleware 530. ), A framework 540, and an application layer 550.

The platform of FIG. 4B differs from that of the library 435 of FIG. 4A in comparison with FIG. 4A and that the application layer 550 is provided as an integrated layer. In addition, the driver 520 and the framework 540 correspond to FIG. 4A.

On the other hand, the library 435 of FIG. 6A can be assumed to be merged into the middleware 530. That is, the middleware 530 is middleware under the legacy system, middleware of MHEG or ACAP, middleware of PSIP or SI, middleware of broadcast information, and DLNA middleware, middleware of peripheral communication, Middleware under the device system can include SSL (Secure Socket Layer) which is a security related library, WebKit (WebKit) which is a web engine related library, libc, and a media framework which is a media related library. On the other hand, it may further include the above-described runtime.

The application layer 550 is an application under the legacy system that can include menu related applications, TV guide applications, reservation applications, etc. and can include email, SMS, calendar, map, browser, have.

On the other hand, the application layer 550 includes an application 565 that is stored in the image display device 100 and can not be deleted by the user, an application 565 that is downloaded and stored through an external device or a network, 575).

4A and 4B may be used in a variety of electronic devices as well as an image display device.

Meanwhile, the platform of FIGS. 4A and 4B may be loaded in the storage 140 or the controller 170 or a separate processor (not shown).

5 is a diagram illustrating a control method of the remote controller of FIG. 1.

5A illustrates that the pointer 180 corresponding to the remote control device 200 is displayed on the display 180. In this case,

The user can move or rotate the remote control device 200 up and down, left and right (Figure 5 (b)), and back and forth (Figure 5 (c)). The pointer 205 displayed on the display 180 of the video display device corresponds to the movement of the remote control device 200. [ The remote control apparatus 200 may be referred to as a spatial remote controller because the pointer 205 is moved and displayed according to the movement in the 3D space as shown in the figure.

5B illustrates that when the user moves the remote control apparatus 200 to the left, the pointer 205 displayed on the display 180 of the image display apparatus also shifts to the left correspondingly.

Information on the motion of the remote control device 200 sensed through the sensor of the remote control device 200 is transmitted to the image display device. The image display apparatus can calculate the coordinates of the pointer 205 from the information on the motion of the remote control apparatus 200. [ The image display apparatus can display the pointer 205 so as to correspond to the calculated coordinates.

5C illustrates a case in which the user moves the remote control device 200 away from the display 180 while pressing a specific button in the remote control device 200. FIG. Thereby, the selected area in the display 180 corresponding to the pointer 205 can be zoomed in and displayed. Conversely, when the user moves the remote control device 200 close to the display 180, the selection area within the display 180 corresponding to the pointer 205 may be zoomed out and zoomed out. On the other hand, when the remote control device 200 moves away from the display 180, the selection area is zoomed out, and when the remote control device 200 approaches the display 180, the selection area may be zoomed in.

On the other hand, when the specific button in the remote control device 200 is pressed, it is possible to exclude recognizing the up, down, left, and right movement. That is, when the remote control device 200 moves away from or near the display 180, the up, down, left and right movements are not recognized, and only the front and back movements can be recognized. Only the pointer 205 is moved in accordance with the upward, downward, leftward, and rightward movement of the remote control device 200 in a state where the specific button in the remote control device 200 is not pressed.

On the other hand, the moving speed and moving direction of the pointer 205 may correspond to the moving speed and moving direction of the remote control device 200.

6 is a perspective view of a remote control apparatus according to an embodiment of the present invention, Figure 7 is an internal block diagram of the remote control apparatus.

Referring to FIG. 6, the spatial remote control 201 according to an embodiment of the present invention may include various input keys or input buttons.

For example, the spatial remote controller 201 may include an Okay key 291, a menu key 292, a four direction key 293, a channel adjustment key 294, and a volume adjustment key 296 have. In addition, a microphone may be further included.

For example, the Okay key 291 may be used to select a menu or item, the menu key 292 may be used to display a predetermined menu, and the four direction keys 293 may be used to select a pointer or an indicator, The channel adjustment key 294 can be used for channel up and down adjustment, and the volume adjustment key 296 can be used for volume up and down adjustment.

In addition, the spatial remote controller 201 may further include a back key 297 and a home key 298. For example, the back key 297 may be used when moving to the previous screen, and the home key 298 may be used when moving to the home screen.

On the other hand, as shown in the figure, the confirmation key 291 may be added with a scroll function. For this, the confirmation key 291 can be implemented as a wheel key. That is, when the OK key 291 is pressed, it is used as a menu or item selection. When the OK key 291 is scrolled up and down, a display screen scrolling or a list page switching can be performed.

In detail, when an image larger than the size of the display is displayed on the display unit 180, when the confirmation key 291 is scrolled to search for the corresponding image, an image area not currently displayed on the display is displayed on the display. As another example, when the list page is displayed on the display unit 180, the previous page or the next page of the current page can be displayed by scrolling the OK key 291. [

This scroll function may be provided with a separate key other than the confirmation key 291. [

On the other hand, the four directional keys 293 can be arranged in four directions in the circular type, as shown in the figure, up, down, left, and right keys. Touch input to the four directional keys 293 may also be possible. For example, if there is a touch operation from the up key to the down key in the direction key 293, the set function may be inputted or performed according to the corresponding touch input.

Referring to FIG. 7, the remote control apparatus 200 includes a wireless communication unit 220, a user input unit 230, a sensor unit 240, an output unit 250, a power supply unit 260, and a storage unit 270. The controller 280 may include an audio input unit 290.

The wireless communication unit 220 transmits / receives signals to / from any one of the video display devices according to the embodiments of the present invention described above. Of the video display devices according to the embodiments of the present invention, one video display device 100 will be described as an example.

In this embodiment, the remote control apparatus 200 may include an RF module 221 capable of transmitting and receiving signals with the image display apparatus 100 according to the RF communication standard. Also, the remote control apparatus 200 may include an IR module 223 capable of transmitting and receiving signals with the image display apparatus 100 according to the IR communication standard.

Further, the remote control device 200 may further include an NFC module (not shown) for short-range magnetic field communication with the electronic device.

The remote control device 200 can transmit a signal containing information on the motion and the like of the remote control device 200 to the image display device 100 through the RF module 221.

Also, the remote control device 200 can receive the signal transmitted by the video display device 100 through the RF module 221. [ Also, the remote control device 200 can transmit commands to the video display device 100 via the IR module 223, such as power on / off, channel change, volume change, and the like, as needed.

On the other hand, according to the present embodiment, the remote control device 200 can receive personal information by a near field communication with a predetermined electronic device.

On the other hand, the remote control device 200 can transmit the received personal information to the video display device 100. [ The communication method at this time can be an IR method or an RF method.

The user input unit 230 may include a keypad, a key (button), a touch pad, or a touch screen. The user can input a command related to the image display apparatus 100 to the remote control apparatus 200 by operating the user input unit 230. [ When the user input unit 230 has a hard key button, the user can input a command related to the image display device 100 to the remote control device 200 through the push operation of the hard key button. When the user input unit 230 includes a touch screen, the user may input a command related to the image display apparatus 100 to the remote control apparatus 200 by touching a soft key of the touch screen. In addition, the user input unit 230 may include various types of input means such as a scroll key, a jog key, and the like that can be operated by the user, and the present invention does not limit the scope of the present invention.

The sensor unit 240 may include a gyro sensor 241 or an acceleration sensor 243. The gyro sensor 241 can sense information on the motion of the remote control device 200. [

For example, the gyro sensor 241 can sense information on the operation of the remote control device 200 based on the x, y, and z axes. The acceleration sensor 243 can sense information on the moving speed of the remote control device 200 and the like. On the other hand, it may further include a distance measuring sensor, whereby the distance to the display 180 can be sensed. Alternatively, it can detect the amount of change in orientation by including a geomagnetic sensor that can detect the direction of the magnetic field generated by the earth and detect the orientation like a compass.

The output unit 250 may output an image or voice signal corresponding to the operation of the user input unit 230 or corresponding to the signal transmitted from the image display apparatus 100. The user can recognize whether the user input unit 230 is operated or whether the image display apparatus 100 is controlled through the output unit 250.

For example, the output unit 250 includes an LED module 251 that is turned on when the user input unit 230 is operated or a signal is transmitted and received between the image display device 100 and the image display device 100 through the wireless communication unit 225, 253 for outputting sound, an acoustic output module 255 for outputting sound, or a display module 257 for outputting an image.

The power supply unit 260 supplies power to the remote control device 200. The power supply unit 260 can reduce power consumption by stopping the power supply when the remote controller 200 is not moving for a predetermined period of time. The power supply unit 260 may resume power supply when a predetermined key provided in the remote control device 200 is operated.

The storage unit 270 may store various types of programs, application data, and the like necessary for the control or operation of the remote control apparatus 200. [ When the remote control device 200 wirelessly transmits and receives a signal through the image display device 100 and the RF module 221, the remote control device 200 and the image display device 100 transmit signals through a predetermined frequency band Send and receive. The control unit 280 of the remote control device 200 stores information on a frequency band or the like capable of wirelessly transmitting and receiving signals with the image display device 100 paired with the remote control device 200 in the storage unit 270. Reference may be made.

In addition, the storage unit 270 may store IR format key codes for controlling other electronic devices as an IR signal, and may store IR format key databases of a plurality of electronic devices.

The control unit 280 controls various matters related to the control of the remote control device 200. [ The controller 280 transmits a signal corresponding to a predetermined key manipulation of the user input unit 230 or a signal corresponding to the movement of the remote controller 200 sensed by the sensor unit 240 through the wireless communication unit 225. 100 can be sent.

The audio input unit 290 is for an audio signal and may include a microphone (MIC). The microphone may receive an external sound signal, for example, a user's voice signal by a microphone, and process the same as electrical voice data.

Meanwhile, the voice signal and data may be transmitted to the image display apparatus 100 through the wireless communication unit 220.

8 is a flowchart illustrating a method of operating an image display apparatus according to an exemplary embodiment of the present invention, and FIGS. 9 to 15 are views for explaining various examples of the method of operating the image display apparatus of FIG. 8.

Referring to the drawings, first, the image display apparatus 100 extracts a partial region of an image (S810). The image may be an image displayed on the display 180 or an image extracted as a thumbnail.

As described above with reference to FIGS. 1 to 3, the image display device according to the present invention may include a plurality of tuners, for example, a first tuner 111 and a second tuner 112, and channel browsing. The processor 160 may extract a thumbnail image of a channel that the user is not watching.

Alternatively, a partial region of the predetermined image 910 displayed on the display 180 may be extracted. In the example of FIG. 9A, an extraction mask 920 is set in a portion of the upper right portion of the image, and the controller 170 or the channel browsing processor 160 has an area 930 corresponding to the extraction mask 920. ) Can be extracted.

Meanwhile, the extraction mask 920 may not be displayed on the display 180 and may be processed only internally in the extraction process.

The controller 170 or the channel browsing processor 160 may detect text included in the extracted region 930 and store the detected text in a channel table. (S830)

The detected text may be a name of a channel or a program corresponding to the image. Or it may include both the channel name and the name of the program.

The broadcast screen displayed on the display 180 may include channel information, for example, a channel banner, a channel name, a channel logo, and a program name, and the channel information is often displayed on the upper right side of the broadcast screen. Accordingly, channel information may be obtained by extracting an upper right region of the screen.

For example, referring to FIG. 9B, a mask 920 is set on an upper right side of an image 910, an upper right area is extracted, and the letter 'Kbc' (included in the extracted area 930) ( 931) can be extracted.

Meanwhile, in the present specification, the channel name may include a broadcasting station name such as 'MBC'.

The text detecting step S820 may include extracting a text image included in the extracted area and converting the extracted text image into the text. You can build a channel table through character recognition.

In the storage step S830, the detected text may be stored together with a physical channel number and a logical channel number of a channel corresponding to the image.

Looking back at the example of "Kbc" 931, a channel name may be added to a channel table as follows.

In addition, it may be stored together with the physical channel number 'xx' and the logical channel number (major channel number 'yy', minor channel number 'zz') of the "Kbc" channel 931.

ChList [x]

{

    Ch_Name = “Kbc”

    Ch_Physical_Number = xx

    Ch_Major_Number = yy

    Ch_Minor_Number = zz

 }

On the other hand, the image extraction step (S820), it is possible to extract a partial region of the image while varying the extracted region.

For example, when the broadcast information or the channel information search is not performed on the upper right side of the screen, the extraction area may be changed while moving the mask.

In addition, when searching for broadcast information or channel information, the mask may be moved and the channel name may be searched when the image is switched.

10 and 11 illustrate extracting channel information by moving a mask to an upper left corner.

Referring to the drawings, when the mask 1020 is set on the upper right side of the image 1010 and channel information such as the channel name cannot be extracted, the mask 1020 is moved to the upper left and the area 1030 in which the channel information exists. Can be extracted.

Meanwhile, the extracted region may include a channel name "MBS" 1031 and a program name "News Hot" 1032.

Thereafter, the channel table may be constructed through character recognition as follows.

ChList [x]

{

    Ch_Name [0] = “MBS”

    Ch_Name [1] = “News Hot”

    Ch_Physical_Number = xx

    Ch_Major_Number = yy

    Ch_Minor_Number = zz

 }

In the above example, the program name is stored as Ch_Name [1] = “News Hot”, but this is merely an example, and the terminology and form used in the channel table may be changed.

Meanwhile, according to an exemplary embodiment of the present invention, by using the plurality of tuners 111 and 112 and the channel browsing processing unit 160, channel information of all or some channels is periodically searched regardless of whether a given channel is viewed or not. Search).

Therefore, even when the channel information image and the text cannot be extracted in the state in which the advertisement image without the channel name or the like is displayed, the channel name of the channel can be secured later.

It is also possible to update all or part of the data in the channel table, and add new channels that are not in the channel table database.

In addition, it is possible to further increase the accuracy by adding a high frequency character as a channel name to the channel table for a certain period of time.

On the other hand, as shown below, the program name is extracted and replaced with the channel name, and as described later, the channel switching is possible only by the program name.

In addition, by adding a channel arrangement, the channel name or program name can be stored separately.

ChList [x]

{

    Ch_Name [] = “I am a singer”

    Ch_Physical_Number = xx

    Ch_Major_Number = yy

    Ch_Minor_Number = zz

 }

Meanwhile, when the detected text is a name of a program corresponding to the image, the corresponding channel name may be extracted from the electronic program guide (EPG).

That is, when the channel name is not searched and only the program name is extracted, the corresponding channel name 1310 may be extracted by matching the broadcast guide from the broadcast schedule table of the electronic program guide 1300 as the program name.

According to the present invention, a channel name can be extracted from an analog channel for which metadata of an electronic program guide (EPG) cannot be obtained, and a channel table database (DB) and a voice database (DB) table can be constructed.

In addition, when a channel table database (DB) and a voice database (DB) table are manually implemented, it is difficult to apply a common table because physical and logical addresses (major and minor) are different for each region / wireline provider.

However, according to the present invention, since the database is configured in the video display device, the channel table database DB and the voice table database DB can be efficiently configured.

The channel table database DB may function as a voice recognition target text table for generating the voice table database DB.

The voice table may be completed by generating a predetermined phonetic symbol from the text table to be recognized. For example, in case of 'MBC', a Korean phonetic symbol of 'M-B-C' may be generated, and 'KBS1' may generate a Korean phonetic symbol of 'K-B-S-One'.

Meanwhile, the channel table database DB and the voice table database DB may be provided separately to operate in conjunction.

Alternatively, the channel table database DB and the voice table database DB may be configured as one database. That is, the channel table database DB may function as the voice table database DB, and may further include parameters such as phonetic symbols required as the voice table database DB.

A method of operating an image display apparatus according to an embodiment of the present invention includes the steps of receiving an audio signal, searching for a channel corresponding to data based on the audio signal in the channel table, and switching a channel based on the search result. It may further include.

According to an embodiment of the present invention, the name of a channel currently being reproduced may be acquired using character recognition, and a voice recognition database DB may be configured based on the acquired channel name. Subsequently, the channel may be switched to the corresponding channel by receiving the user's voice input.

On the other hand, the voice signal input may be received through a remote control device. The remote control apparatus 200 may include an audio input unit 290, and the user may switch channels by inputting a name, a number, and the like of a channel to be viewed in the microphone of the audio input unit 290.

Referring to FIG. 14, when entering the voice channel switching mode, a guide message 1420 may be further displayed in addition to the channel image 1410 being viewed.

The guidance message 1420 may include a help for switching the voice channel, for example, "Please tell a channel you want to watch. Please check if you do not cover the microphone of the remote control."

On the other hand, the voice channel switching mode may be entered in a variety of ways, such as pressing one of the hard keys provided on the remote control device 200, or selecting a menu displayed on the display 180.

When the user inputs "Kbc", channel information matching the input result may be obtained from the channel table, and the channel may be switched to the "Kbc" channel.

On the other hand, the operation method of the image display device according to an embodiment of the present invention processing the noise of the received speech signal, extracting a feature parameter from the noise processed speech signal, pattern of the extracted feature parameter The method may further include recognizing and comparing the recognized pattern with a voice database to determine data corresponding to the received voice signal.

15 briefly illustrates a configuration and operation of an example of a speech recognition engine.

Referring to FIG. 15, first, noise of the received voice signal 1510 is processed. (1520) The noise processing process may be referred to as end-point detection, and only a voice section from an input signal is input. It may be a process of detecting.

A statistical feature, which is relatively simple in the calculation process, can be extracted from the input signal to distinguish between the speech section and the silent section.

A commonly used method is to determine the speech interval and the silence interval by comparing the energy value (or log energy value) at every interval of the input signal and comparing it with a predetermined threshold value by statistics.

On the other hand, the noise processing may further include other noise processing required.

Thereafter, a feature parameter valid for recognition is extracted from the input voice signal (1530).

Here, a method based on LPC (Linear Predictive Coefficients) and an MFFC (Mel Frequency Cepstral Coefficients) extraction method can be used.

Thereafter, a voice signal and a pattern of the extracted feature parameter may be recognized (1540), and an acoustic model 1541 may be used for pattern recognition.

This is a method of modeling and comparing the signal characteristics of speech, and a direct comparison method of setting the recognition object as the feature vector model and comparing it with the feature vector of the input signal can be used. In the direct comparison method, a unit of a recognition target word, a phoneme, and the like is set as a feature vector model, and it is possible to compare how similar the input speech is.

Alternatively, a statistical method of statistically processing and using the feature vector of the recognition object can be used. This statistical method can construct the unit of the recognition target as a state sequence and use the relation between the status columns. The DTW (Dynamic Time Warping) method using the temporal arrangement relation, the probability value, And HMM (Hidden Markov Model) method.

In more detail, DTW (Dynamic Time Warping) is a method of obtaining the distance between the reference speech signal and the input speech signal using dynamic programming, and is mainly used for constructing a speaker-dependent isolated word recognition system and has a high recognition rate.

HMM (Hidden Markov Model) is a method of expressing transition probability of a negative state from one state to the next state, constructing a model representative of these from training data by using temporal statistical characteristics of a speech signal, And a probability model with a high degree of similarity is adopted as the recognition result.

Thereafter, data corresponding to the received voice signal may be determined, and a recognition result 1560 may be output.

Meanwhile, the data discrimination process may include an operation of language processing 1550 using the language model 1551.

The language model is generally used to find probability values for all possible word sequences. The grammar-based method considers only word sequences that are grammatically correct for a given situation among the possible combinations of words. From a database of uttered speech in a given situation, , A statistical-based scheme may be used that statistically estimates a probability value of a possible word sequence.

Meanwhile, when the searched channels are plural, the method may further include displaying a plurality of channels on a display and receiving a channel selection input, wherein the channel switching may include channel switching according to the channel selection input. have.

In addition, the channel selection input may be a voice signal input corresponding to a display name of a channel name or a plurality of channels.

For example, when the "MBC" is input, the cable channels of the broadcasting station "MBC" may also include the name "MBC" in addition to the "MBC" which is a public wave. Thus, a plurality of channels can be searched.

In this case, the user can not only select one of a plurality of items displayed in a conventional manner by using the remote control apparatus 200, but also display the order by inputting " three ", " three " and " third " You can switch to the third channel. In addition, while viewing the displayed plurality of channel names, a full name of a channel to be viewed may be input by voice input.

16 is a flowchart illustrating a method of operating an image display apparatus according to an exemplary embodiment of the present invention.

As described above with reference to FIGS. 8 to 15, the operation method of the image display apparatus according to the exemplary embodiment of the present invention may include receiving a voice signal (S1610), and the voice signal input is remotely controlled. May be received via the device.

The method may include searching for a channel corresponding to the data based on the voice signal in the channel table (S1620), and switching the channel based on the search result (S1610).

On the other hand, for analyzing the speech signal, processing the noise of the received speech signal, extracting a feature parameter from the noise processed speech signal, recognizing the pattern of the extracted feature parameter, the recognized The method may further include comparing the pattern with a voice database to determine data corresponding to the received voice signal.

In this case, the pattern recognition step may be performed by comparing the extracted feature parameter with a feature vector model set in units of words or phonemes, or directly comparing the extracted feature parameter with a reference model or statistically processing the extracted feature parameter. Can be performed. Since this has been described in detail with reference to FIG. 15, description thereof will be omitted.

or. Various known speech recognition methods and speech recognition engines can be used.

Meanwhile, when the searched channels are plural, the method may further include displaying a plurality of channels on a display and receiving a channel selection input, wherein the channel switching may include channel switching according to the channel selection input. have.

In addition, the channel selection input may be a voice signal input corresponding to a display name of a channel name or a plurality of channels.

17 is a diagram illustrating a platform structure according to an embodiment of the present invention.

In more detail, the configuration and operation of the driver 420 and the middleware 430 of the platform structure diagram described with reference to FIGS. 4A and 4B are illustrated.

First, the channel browsing processor, that is, the channel browser CHB 1740, may periodically search for a channel and extract channel image information and thumbnail image 1741.

Thereafter, the text recognition unit 1750 may extract a portion of the image (1751) and recognize the character (1752) to configure channel information. (1753) The text recognition unit 1750 may include a channel browsing processor ( 160 or the control unit 170 may be provided.

The voice engine 1710 receives a channel name and channel information and stores a channel table 1714 storing information necessary for channel switching, for example, a physical number, a major number, and a minor number of channels. Can be configured.

Meanwhile, the channel table 1714 may be provided inside the voice engine 1713 or may be separately provided.

The recognition engine 1720 may generate or manage a voice table database. The voice table database may include the channel table 1714 as described above or may operate in conjunction with the channel table 1714.

The recognition engine 1720 may be included in the speech engine 1710.

The EMVOICE API 1711 creates a function that can be used in a higher layer.

When the voice channel switching mode is entered, the EMVOICE MAIN 1712 may notify the remote controller driver 1770 of the voice channel switching mode and receive a voice signal.

Thereafter, the recognition engine 1720 compares the voice data (PCM, etc.) with the DB and returns a recognized result to the voice engine 1710, and the channel manager (CM, 1730) switches channels. can do.

According to the embodiment of the present invention, it is possible to provide an efficient channel information collection and channel switching method, it is possible to improve the convenience of the user.

The image display apparatus and the operation method thereof according to the present invention are not limited to the configuration and method of the embodiments described above but the embodiments can be applied to all or some of the embodiments May be selectively combined.

Meanwhile, the operation method of the image display apparatus of the present invention can be implemented as a code that can be read by a processor on a recording medium readable by a processor included in the image display apparatus. The processor-readable recording medium includes all kinds of recording apparatuses in which data that can be read by the processor is stored. Examples of the recording medium that can be read by the processor include a ROM, a RAM, a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like, and may also be implemented in the form of a carrier wave such as transmission over the Internet . In addition, the processor-readable recording medium may be distributed over network-connected computer systems so that code readable by the processor in a distributed fashion can be stored and executed.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the present invention.

Claims (19)

Extracting a partial region of an image;
Detecting text included in the extracted area; And
And storing the detected text in a channel table. The method of claim 1,
And the image is an image displayed on a display or an image extracted as a thumbnail. The method of claim 1,
The extracting of the image may include extracting a partial region of the image while varying the extracted region. The method of claim 1,
The text detection step,
Extracting a text image included in the extracted area; and
And converting the extracted text image into the text. The method of claim 1,
And the detected text is a name of a channel or a program corresponding to the image. The method of claim 5,
If the detected text is a name of a program corresponding to the image, extracting a corresponding channel name from an electronic program guide (EPG). The method of claim 1,
In the storing step, the detected text is stored together with a physical channel number and a logical channel number of a channel corresponding to the image. The method of claim 1,
Receiving a voice signal;
Searching for a channel corresponding to data based on the voice signal in the channel table;
And switching the channel based on the search result. 9. The method of claim 8,
The audio signal input is received through a remote control device. 9. The method of claim 8,
Processing noise of the received voice signal;
Extracting feature parameters from the noise processed speech signal;
Recognizing a pattern of the extracted feature parameters;
And comparing the recognized pattern with a speech database to determine data corresponding to the received speech signal. 9. The method of claim 8,
If the searched channels are plural, displaying a plurality of channels on a display; and receiving a channel selection input;
In the channel switching step, the channel switching method according to the channel selection input. The method of claim 11,
And the channel selection input is an audio signal input corresponding to a display name of a channel name or a plurality of channels. Receiving a voice signal;
Searching for a channel corresponding to data based on the voice signal in the channel table; And
And switching channels based on the search result. The method of claim 13,
The audio signal input is received through a remote control device. The method of claim 13,
Processing noise of the received voice signal;
Extracting feature parameters from the noise processed speech signal;
Recognizing a pattern of the extracted feature parameters;
And comparing the recognized pattern with a speech database to determine data corresponding to the received speech signal. 16. The method of claim 15,
The pattern recognition operation is performed by comparing the extracted feature parameter with a feature vector model set in units of words or phonemes. 16. The method of claim 15,
The pattern recognition operation may be performed by directly comparing or extracting the extracted feature parameter with a reference model or by statistically processing the extracted feature parameter. The method of claim 13,
If the searched channels are plural, displaying a plurality of channels on a display; and receiving a channel selection input;
In the channel switching step, the channel switching method according to the channel selection input. 19. The method of claim 18,
And the channel selection input is an audio signal input corresponding to a display name of a channel name or a plurality of channels.

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