CN204836191U - Equipment based on CDR carries out timing - Google Patents

Abstract

The utility model provides a device for correcting time based on China Digital Audio Broadcasting CDR, comprising a CDR radio frequency module, a CDR analysis module, a time compensation module and a local time module, wherein: the CDR radio frequency module is connected with the CDR analysis module, For receiving the CDR code stream; the CDR parsing module is used for parsing the received CDR code stream to obtain current time information; the time compensation module is connected with the CDR parsing module for the current time information performing compensation to obtain compensated time information; and a local time module connected to the time compensation module for replacing the local time information contained therein with the compensated time information. The utility model utilizes the ability of the front-end system of China Digital Audio Broadcasting (China? Digital? Radio, CDR) to broadcast the signal of the real time at any time, and uses the real-time reception, analysis and adjustment of the time on the terminal to realize the accuracy of the electronic equipment/terminal Automatic time adjustment.

Description

A device for time calibration based on CDR

technical field

The utility model relates to a digital broadcasting system, in particular to a device for correcting time based on CDR.

Background technique

Digital broadcasting (Digital broadcasting) refers to the digitized audio signal, video signal, and various data signals, which are processed in a digital state by various encoding, modulation, and transmission. At the same time, digital broadcasting is also a broadcasting technology different from the traditionally known AM and FM. It transmits digital signals through ground transmitting stations to achieve the purpose of broadcasting and data information transmission.

China Digital Radio (CDR), as an important part of my country's radio and television digitalization process, is the development direction of broadcasting digitization. It can overcome the shortcomings of traditional analog audio broadcasting that cannot realize time signal transmission.

Traditional analog audio broadcasting cannot realize time signal transmission. It can only use artificial voice or synthetic voice to broadcast time signal to listeners in audio form, so that they can know the current time instantly. However, the time broadcast in this way is only suitable for people to listen to, but it can hardly be used for time correction in electronic systems. In addition, the above method generally only broadcasts the time on the hour or the half hour, but cannot broadcast the instant time at any time or with high frequency.

Therefore, there is a need for a device and method that can use the CDR radio frequency signal to perform time calibration in the electronic system at any time.

Utility model content

The purpose of this utility model is to provide a device for correcting time based on CDR that can overcome the above defects.

The utility model provides a device for correcting time based on China Digital Audio Broadcasting CDR, comprising a CDR radio frequency module, a CDR analysis module, a time compensation module and a local time module, wherein: the CDR radio frequency module is connected with the CDR analysis module, For receiving the CDR code stream; the CDR parsing module is used for parsing the received CDR code stream to obtain current time information; the time compensation module is connected with the CDR parsing module for the current time information performing compensation to obtain compensated time information; and a local time module connected to the time compensation module for replacing the local time information contained therein with the compensated time information.

Preferably, the device further includes a trigger module, which is connected to the CDR radio frequency module, and is configured to send an instruction to the CDR radio frequency module through a trigger signal, so that it starts to receive the CDR radio frequency code stream.

Preferably, the CDR parsing module sequentially parses the received CDR code stream to obtain a plurality of current time information, and the device also includes: a CDR time comparison module, which is connected to the CDR parsing module and the time compensation module connected to compare the plurality of current time information to judge the correctness of the plurality of current time information, and the time compensation module compensates the current time information judged to be correct.

Preferably, the local time module is further configured to: compare the compensated time information with the local time information before replacing the local time information contained therein with the compensated time information, and if The replacement is performed under predetermined conditions.

Preferably, the trigger signal is generated by one or more of a power-on trigger, a timing trigger, a random trigger, and a communication trigger.

Preferably, the CDR parsing module includes: a CDR demodulation module and a CDR decoding module connected to each other, respectively used to demodulate the received CDR code stream and decode the demodulated CDR code stream, so as to obtain the Describe the current time information.

Preferably, the CDR parsing module includes:

A timing module, configured to time the analysis, so as to compensate the current time information.

The utility model utilizes the ability of the front-end system of China Digital Radio (CDR) to broadcast real-time time signals at any time, and uses the real-time reception, analysis and adjustment of the time on the terminal to realize accurate and automatic time calibration of electronic equipment/terminals .

Description of drawings

Fig. 1 is the structural block diagram of the equipment that carries out time correction based on CDR according to the utility model embodiment;

Fig. 2 is a flowchart of a method for correcting time based on CDR according to an embodiment of the present invention.

Detailed ways

The technical solutions of the present utility model will be further described in detail through the drawings and embodiments below.

Fig. 1 is a structural block diagram of a device for correcting time based on CDR according to an embodiment of the present invention. As shown in Figure 1, the device includes a trigger module, a CDR radio frequency module, a CDR analysis module, a CDR time comparison module, a time compensation module, and a local time module.

In the following, the functions of each module in the device according to the embodiment of the present invention and the entire timing process will be discussed in detail.

The trigger module is used to trigger the entire timing process in various ways. For example, after receiving the trigger signal, an instruction can be sent to the CDR radio frequency module to start receiving the CDRCDR radio frequency code stream. The terminal may be various electronic terminals, including but not limited to smart phones, personal digital assistants, portable computers, electronic watches and the like. The means of triggering time calibration include but not limited to: power-on triggering; timing triggering set by the user or the terminal itself; user random triggering, such as button triggering, voice triggering, touch screen triggering, mobile terminal control communication triggering, etc.

The CDR radio frequency module receives the CDR radio frequency code stream after the time calibration process is triggered, and the code stream contains the current time signal.

Preferably, the CDR parsing module parses the multiple received CDR code streams, and parses out multiple pieces of current time information. For example, the CDR parsing module may include an interconnected CDR demodulation module and a decoding module, which are respectively used for demodulation and decoding, that is, the CDR demodulation module demodulates the received CDR code stream, and then the CDR decoding module Decode the demodulated code stream to obtain the current time information. The current time information refers to the time information obtained from the CDR code stream by parsing, and the time information obtained each time is different. It should be understood that the number of parsing times can be preset according to experience or experimental data.

The CDR time comparison module is used to compare the time features in the above multiple current time information to judge the correctness of the received time information.

If it is judged that the received time information is incorrect, the CDR code streams received multiple times subsequently are analyzed again.

If it is judged that the received time information is correct, the time compensation module compensates the instant time information judged to be correct to obtain the compensated time information. Specifically, the instant time information judged to be correct needs to be processed, taking into account the channel processing time, the decoding processing time of the system, etc., and compensating the instant time information, so as to obtain a more accurate current time. The compensated time information is input to the local time module. Therefore, the CDR parsing module may further include a timing module for timing the processing time of the CDR code stream (demodulation, decoding), and finally compensate the processing time to the current real time.

The local time module generally includes a time measurement module of the terminal itself, and includes local time information in the terminal. The local time module compares the compensated time information with the local time information, and replaces the local time information with the compensated time information when a predetermined condition is met. For example, the predetermined condition may be a threshold, and if the difference between the two compared with each other is greater than the predetermined threshold, replacement is performed, otherwise no replacement is performed.

It should be understood that the above two embodiments are only preferred modes of the present utility model, rather than limiting the present utility model. For example, the CDR code stream can be analyzed only once without demodulation and decoding multiple times, and the subsequent comparison and judgment steps can be omitted, that is, the current time information obtained by the analysis can be directly compensated. In addition, each module in the device according to the present invention can be integrated or disassembled to achieve the corresponding combined or disassembled functions. Each module in the device of the present invention can be implemented as a well-known integrated circuit IC or system on chip SoC.

Professionals should further realize that the units and algorithm steps described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the relationship between hardware and software Interchangeability. In the above description, the composition and steps of each example have been generally described according to their functions. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present invention.

The steps of the methods or algorithms described in connection with the embodiments disclosed herein may be implemented by hardware, software modules executed by a processor, or a combination of both. Software modules can be placed in random access memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or any other Any other known storage medium.

The specific implementation manners described above further describe the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above descriptions are only specific implementations of the present utility model, and are not intended to limit the scope of protection of the present utility model. Any modifications made, equivalent to Replacement, improvement, etc. should all be included in the protection scope of the present utility model.

Claims (7)

1., based on the equipment that Chinese Digital audio broadcasting CDR is calibrated, comprise CDR radio-frequency module, CDR parsing module, time bias module and local zone time module, wherein:

CDR radio-frequency module is connected with described CDR parsing module, for receiving CDR code stream;

CDR parsing module, for resolving the CDR code stream received, obtains current time information;

Time bias module, it is connected with described CDR parsing module, for compensating described current time information, the temporal information after being compensated; And

Local zone time module, it is connected with described time bias module, for the local time information wherein comprised is replaced with the temporal information after described compensation.

2. equipment according to claim 1, also comprises:

Trigger module, it is connected with described CDR radio-frequency module, for sending instruction by triggering signal to described CDR radio-frequency module, makes it start described reception CDR radio frequency code stream.

3. equipment according to claim 1, wherein, described CDR parsing module is resolved successively to the CDR code stream received, and obtains multiple current time information, and this equipment also comprises:

CDR time comparison module, it is connected with described time bias module with described CDR parsing module, for described multiple current time information is compared, to judge the correctness of described multiple current time information, described time bias module is to being judged as that correct current time information compensates.

4. equipment according to claim 1, wherein, described local zone time module also for:

Before temporal information after the local time information wherein comprised is replaced with described compensation, the temporal information after described compensation and described local time information being compared, carrying out described replacement when meeting predetermined condition.

5. equipment according to claim 2, wherein, described triggering signal is generated by one or more in triggering of starting shooting, clocked flip, random triggering, communications triggered.

6. equipment according to claim 1, wherein, described CDR parsing module comprises:

Interconnective CDR demodulation module and CDR decoder module, be respectively used to carry out demodulation to the CDR code stream received and decode to the CDR code stream after demodulation, to obtain described current time information.

7. equipment according to claim 1, wherein, described CDR parsing module comprises:

Timing module, for carrying out timing to described parsing, compensates for described current time information.