JPH10276371A - Satellite broadcasting receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent useless power consumption supplied to a BS antenna by setting satellite broadcasting stop time for the eclipse of the earth to the reservation of timer and stopping supplying power to the BS antenna just for the satellite broadcasting stop time by controlling a power supply system when any abnormality is detected from a received radio wave abnormality detecting means. SOLUTION: The timing and time to stop broadcasting by a satellite because of the eclipse of the earth are preset to the timer of system control timer microcomputer 8 in this satellite receiver and the power supply to a BS antenna 2 is stopped by outputting a power supply control signal 9 for BS antenna based on the result of timer reservation or the result of timer reservation and the detected result of electric field intensity in the received radio wave. Thus, even when the power supply to the BS antenna 1 is not interlocked with a power source, the stop of broadcasting because of the eclipse of the earth is surely judged and useless power supply to the BS antenna 1 can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

2. Description of the Related Art In order to receive a satellite broadcast, a satellite broadcast receiving antenna (hereinafter referred to as a "BS antenna") is required. In addition, in order to convert a received signal into a normal IF signal or the like, power is supplied to the BS antenna. Must be supplied. For this reason, the power supply to the BS antenna is a system in which power is supplied directly from the satellite broadcast receiving device in ordinary households except for a common listening antenna such as an apartment. As a method of supplying power directly from the satellite broadcast receiver, a method of supplying power in conjunction with the power of the satellite broadcast receiver (power supply interlocking) and a method of supplying power independently of the power of the satellite broadcast receiver (power supply) Non-interlocked).

In general, there is one BS antenna per house, and in a combination of a magnetic recording device with a satellite broadcast receiving device and a television with a satellite broadcast receiving device, a received signal of a satellite broadcast cannot be obtained by a magnetic wave with the satellite broadcast receiving device. The data is sent to the television with the satellite broadcast receiving device via the recording device. Therefore, a television with a satellite broadcast receiver may be watched without turning on the magnetic recording device with a satellite broadcast receiver.
In the magnetic recording device with a satellite broadcast receiving device, power supply non-interlocking is usually selected from the above two types of power supply methods. Therefore, the BS antenna is always in an energized state.

[0003] On the other hand, during a time period in which a broadcasting satellite is hidden behind the earth due to the eclipse of the earth, satellite broadcasting, which is a power source of the broadcasting satellite, cannot be generated, so that satellite broadcasting is suspended.
This earth eclipse occurs because the earth's axis is tilted, and it actually occurs for about 50 days (100 days a year) before and after the equinox and autumn equinoxes, with a maximum duration of 70 minutes. It is about. This satellite broadcast interruption time is shifted from the reception time of a normal user, and occurs around 1:40 am.

[0004] In actual satellite broadcasting (BS-3 type), from 0:30 am to 4: 3 am
The broadcast has been suspended for 0 minutes (4 hours). Therefore, the broadcast interruption time is 4 (hours) x 100 (days) when converted to one year.
= 400 hours.

[0005] Among the above-mentioned power supply methods for the BS antenna, the power supply non-interlocked power supply method that is likely to be used in ordinary households is used even when actual broadcasting is not performed due to eclipse of the earth. , And wasteful power is consumed.

[0006]

SUMMARY OF THE INVENTION When satellite broadcasting is interrupted by eclipse of the earth, it is possible to prevent wasteful power consumption supplied to a BS antenna.

[0007]

SUMMARY OF THE INVENTION A satellite broadcast receiving apparatus has B
A power supply means for supplying power to the S antenna, a reception radio wave abnormality detection means for detecting that the reception radio wave is in a weak electric field state, and a timer reservation means; The satellite broadcast interruption time during which the broadcast is interrupted is set, and the satellite broadcast interruption is performed by controlling the power supply means when an abnormality is detected from the reception radio wave abnormality detection means during the satellite broadcast interruption time. The power supply to the BS antenna is interrupted only for the time.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In a case where a video tape recorder (hereinafter referred to as "VTR"), which is one of magnetic recording apparatuses with a satellite receiver, directly supplies power to a BS antenna, the present invention is applied to the VT.
An example used for R will be described. FIG. 1 is a block diagram of a VTR according to one embodiment of the present invention, and FIG. 2 is a system in which power supply to the BS antenna 1 is interrupted only by a timer reservation result of the VTR according to one embodiment of the present invention.
FIG. 3 is a flowchart showing the processing of the timer microcomputer 8, and FIG. 3 shows a system in which the power supply to the BS antenna 1 is interrupted based on the timer reservation result of the VTR and the detection result of the received radio field intensity according to an embodiment of the present invention. 4 is a flowchart showing a process of the timer microcomputer 8.

First, the block diagram of FIG. 1 will be described. As shown in FIG. 1, a BS radio signal input from a BS antenna 1 is sent to a BS tuner block 3 via a BS antenna power supply line and a BS radio signal line 2, and a BS video signal is output by a BS demodulation circuit 4. 5 is converted. The converted BS video signal 5 is supplied to the video circuit 6 for channel selection. In the sync extraction circuit, The signal is shaped into only the sync 7 and sent to the system timer microcomputer 8 for channel selection.

The system timer microcomputer 8 has a counter port, and the H.264 for channel selection is sent to the microcomputer. sy
The electric field strength of the received radio wave is detected by counting the number of Hs of nc7. The system microcomputer 8 has history data and a normal timer reservation function, and outputs a BS power control signal 9 according to the result of the timer reservation or the result of the timer reservation and the detection result of the electric field strength of the received radio wave. .

In the case of the present embodiment, the time and the time when the satellite suspends broadcasting due to the eclipse of the earth are set in advance in the timer of the system timer microcomputer 8 and the BS power control signal 9 is controlled. To do it. That is, the BS antenna 1 is used only with the result of the timer reservation.
If the current time is set by a timer and the satellite is interrupting the broadcast due to the eclipse of the earth, the BS power control signal 9 is set to Lo. If BS power control signal 9
To Hi. When the power supply to the BS antenna is interrupted based on the result of the timer reservation and the detection result of the electric field strength of the received radio wave, when the current time is the time set in the timer and the received radio wave is a weak electric field, the BS power supply is stopped. The control signal 9 is set to Lo, and at other times, the BS power control signal 9 is set to Hi.

Here, the setting of the power supply interruption time of the BS antenna 1 to the timer and the setting of the power supply interlocking / non-interlocking of the power supply of the BS antenna 1 are performed on a monitor (not shown) connected to the video circuit 6. The operation is performed on the projected on-screen, and the on-screen circuit provided in the video circuit 6 includes:
It is controlled by an on-screen circuit control signal 14 from the system timer microcomputer 8. When the VTR setting is linked to the power supply, power is supplied to the BS antenna only when the power supply is in the power ON state.
This is the case when R is powered on. Note that the BS tuning signal 10 is a signal for performing tuning control of the BS tuner block 3.

Next, a power supply line of the BS antenna 1 will be described. The electronic switch circuit 11 is an electronic switch including transistors Tr1 and Tr2 and resistors R1 to R4, and the power supply of the BS antenna 1 is controlled by the BS antenna control signal 9. That is, the BS antenna power supply 12 output from the power supply circuit 1 is controlled by Hi / Lo of the BS control signal 9 output from the system microcomputer 8.
Therefore, the power control signal 9 for the BS antenna becomes Hi.
In the case of, if the power supply 12 for the BS antenna is supplied to the diode D1 and the mechanical switch SW1 in the above-described BS tuner block 3 is selected to be ON (power is turned on), the power is supplied to the BS antenna 1. become.
Incidentally, the diode D1 is for preventing reverse current.

As shown in the flowchart of FIG. 2, when the timer is set (S1), it is determined whether the setting of the VTR is linked to the power supply or not linked to the power supply (S1).
2) It is done. If non-interlocking is set, if the current time is set by a timer, and if the satellite is in a period of time when broadcasting is interrupted due to eclipse by the earth (S3), BS
The antenna power control signal 9 is set to Lo (S
4) The power supply of the BS antenna 1 is interrupted. Also, S2
If the power supply interlock is set in the routine of
It is determined whether or not the R body is powered on (S
6) If the power is ON, the process proceeds to the S3 routine described above. In this way, when the satellite is interrupting the broadcast due to eclipse by the earth, useless power supply to the BS antenna 1 can be prevented.

FIG. 3 is a flowchart of an electric field strength confirmation type in which an operation for confirming whether or not a signal from a BS satellite has been added has been added in order to more reliably determine that the satellite has stopped broadcasting. is there. As described above, the channel selection H. SYN
Added a check item to let the system timer microcomputer 8 confirm that the electric field strength has dropped due to the determination of C7,
This is a system in which the power supply interruption operation to the BS antenna is more reliably performed. The same routines as the determination processing routine of FIG. 2 are denoted by the same reference numerals, and only the added routine will be described.

In the S3 routine, if the current time is reserved by the timer in the VTR, and the time period is during the time when the satellite is interrupting the broadcast due to the eclipse of the earth, the channel of the VTR is selected as the BS channel (S10) and the received radio wave is received. It is determined whether or not the electric field strength is a weak electric field (S11). Only when the electric field strength of the received radio wave is a weak electric field, the BS antenna control signal 9 is set to Lo (S4). The determination as to whether or not the received radio wave is a weak electric field (S11) is for flexibly responding to a change in the satellite broadcast interruption time of the broadcasting satellite, and the power supply interruption time zone of the BS antenna reserved by the user on the timer. In spite of the fact that satellite broadcasting is actually being done,
This is to prevent the power supply of the BS antenna from being interrupted and the satellite broadcasting from being unable to be received. In this way, it is possible to reliably determine that the satellite has interrupted the broadcast due to the eclipse of the earth, and to prevent unnecessary power supply to the BS antenna 1.

[0017]

According to the present invention, there is no need to add a special circuit, and by adding a criterion for determining the season and time when the eclipse of the earth occurs, the reception failure of the satellite broadcasting can be reduced. Therefore, it is easy to distinguish whether the interruption is due to the interruption of the satellite broadcasting or another failure, whereby the wasteful power supply to the satellite broadcasting antenna can be interrupted and the power supply can be saved.

[Brief description of the drawings]

FIG. 1 is a block diagram of a VTR according to an embodiment of the present invention.

FIG. 2 is a flowchart showing an embodiment of the present invention.

FIG. 3 is a flowchart showing processing of a system timer microcomputer 8 of the VTR according to one embodiment of the present invention.

[Explanation of symbols]

SW1 ... BS antenna power supply ON / OFF switch C1 ... Condenser D1 ... Diode 1 ... BS antenna 2 ... BS antenna power supply line and BS radio signal line 3 ... BS tuner block 4 ... BS signal demodulation unit 5 BS video signal 6 Video circuit (H. SYNC cutout circuit) 7 H. BS for channel selection SYNC 8: Syscon timer microcomputer 9: Power control signal for BS antenna 10: BS tuning signal 11: Electronic switch circuit 12: Power supply for BS antenna 13: Power circuit 14: On-screen Circuit control signal

Claims (4)

[Claims] 1. A satellite broadcast receiving apparatus, comprising: a power supply means for supplying power to a satellite broadcast receiving antenna; and a timer reservation means, wherein the timer reservation means keeps the power supply of the satellite broadcast reception antenna for a predetermined time. A satellite broadcast receiving apparatus, wherein the power supply means is controlled so as to be interrupted. 2. The satellite broadcast receiving apparatus according to claim 1,
The satellite broadcast receiving apparatus according to claim 1, wherein the predetermined time is a time when the satellite is interrupting the satellite broadcast due to eating by the earth. 3. The satellite broadcast receiving apparatus according to claim 1, further comprising a reception radio wave abnormality detecting means for detecting that the reception radio wave has entered a weak electric field state, wherein said reception radio wave abnormality detection means detects said reception radio wave abnormality during said predetermined time. A satellite broadcast receiving apparatus, wherein when the abnormality is detected, the power supply to the satellite broadcast receiving antenna is interrupted for the predetermined time by controlling the power supply means. 4. The satellite broadcast receiving apparatus according to claim 1,
A satellite broadcast receiving apparatus, wherein the circuit of the power supply means is a circuit of a power supply apparatus for supplying power to the satellite broadcast receiving antenna in conjunction with or not in conjunction with the power supply of the satellite broadcast receiving apparatus.