JPH088682B2 - TV relay system - Google Patents

Description

The present invention relates to a television relay system, and more particularly to a television relay system using a satellite line.

[Conventional technology]

Conventionally, the television relay system using this kind of satellite line has not been repaired against the failure of the satellite line,
When the quality of a television signal deteriorates due to the influence of rainfall or the like, the quality-deteriorated television signal is directly transmitted to a broadcasting station. For this reason, a television relay system using a satellite line is not common, and all television relay systems in a television network including a normal key station are configured only by terrestrial lines.

[Problems to be Solved by the Invention]

The above-mentioned conventional TV relay system using a satellite line is
In order to remedy a satellite line failure, a ground line is connected to a program scheduled in advance, and when the satellite line fails, it is manually switched to the ground line for relief, and it is not possible to switch instantaneously. There is a point.

It is an object of the present invention to provide a television relay system capable of relieving a satellite line failure by connecting the terrestrial line and automatically switching to the terrestrial line instantly when the satellite line failure occurs.

[Means for solving the problem]

The television relay system of the present invention is connected to a broadcasting station and further connected to a satellite by a plurality of satellite lines, and is a television program received from a satellite via a first satellite line which is one of the satellite lines. To the broadcasting station, and, like the first earth station, are connected to the satellite by the plurality of satellite lines, and the television program is transmitted via the first satellite line. A second earth station receiving from satellites,
In a television relay system provided with a ground line connecting between the first earth station and the second earth station, the first earth station is in operation while the first satellite line of its own station is in operation. A first line fault detecting means for detecting a fault in the first satellite line when the fault occurs, specifying the faulty first satellite line, and outputting satellite line fault information; The TV program to be sent to
And a rescue program receiving end switch for switching from a television program received by the satellite line to a television program received by the second earth station and sent through the terrestrial line, and switched and output by the rescue program receiving end switch. A line selector switch for connecting a television program line to an output line to the broadcasting station; and receiving the satellite channel failure information, confirming that the line selector switch is in operation, and the second earth station. When the first satellite line that is being received by is normal, sends ground line connection request information requesting that the television program being received by the second earth station be transmitted to the ground line, A second control unit for controlling the rescue program receiving end switch when a control response to the ground line connection request is returned from the second earth station, wherein the second earth station is Received Second line fault detecting means for detecting the presence / absence of a fault in the first satellite line, and the television program received by the own station via the first satellite line is sent to the terrestrial line. A rescue program sending end switch, and information about the presence / absence of a failure of the first satellite line received by the local station, which is obtained from the second line fault detecting means, is sent to the first control means, Second control means for receiving the land line connection request information from the first control means, controlling the rescue program sending end switch, and sending a control response to the first control means. There is.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

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

The television relay system shown in FIG. 1 is connected to a broadcasting station 11 and further connected to a satellite device 10 by a plurality of satellite lines 1a to 3a, and the satellite device 10 is connected via a satellite line 2a of the satellite lines 1a to 3a. The earth station 17a which sends out the television program received from the broadcasting station 11 is connected to the earth station 17a through the backup ground line 9, and is further connected to the satellite device 10 and the satellite lines 1b to 3b like the earth station 17a. , An earth station 17b that receives the same television program as the earth station 17a from the satellite device 10 via the satellite line 2b.

The earth station 17a also switches the satellite receiving device 5a that receives the television program transmitted from the satellite device 10, the television program received by the satellite receiving device 5a, and the television program received through the backup ground line 9 to the switch 21. 23 to 23, and further, the rescue program receiving end switch unit 7 for performing fault monitoring of the satellite lines 1a to 3a and controlling the switch, and the rescue program receiving end switch unit 7
The television program switch unit 4a which connects the line of the television program which is switched and output by the switches 21 to 23 of the above to the output line 18 which is the output line to the broadcasting station 11 by the switches 24 to 26.
Then, when the ground station 17a sends a television program received by the ground station 17b and sent via the backup ground line 9 to the broadcasting station 11, the switch 28 is operated to be sent via the backup ground line 9. TV show signal switch
Switches 24 to 26 of the television program switch unit 4a receive the satellite line failure information output from the heterogeneous program prevention switch unit 8 for preventing entering the outgoing line 29 via 27 and the rescue program receiving end switch unit 7. Check the operation of the earth station
When the satellite lines 1b to 3b received by 17b are normal, the ground line connection request information requesting that the television program received by the earth station 17b be transmitted to the backup ground line 9 via the control line 16. When the control response of the ground line connection request is returned from the earth station 17b,
The repair control unit 14 controls the switches 21 to 23.

Further, the earth station 17b monitors the failure of the satellite lines 1b to 3b and controls a switch for sending the television program received by the own station to the terrestrial line, and a rescue program sending end switch unit 6 and a rescue program. Information on the presence / absence of a fault in the satellite lines 1b to 3b received by the own station, which is obtained from the program sending end switch unit 6, is provided to the rescue control unit.
14 through the control line 16, receives ground line connection request information from the rescue control unit 14, controls the switches 31 to 33 of the rescue program sending end switch unit 6, and sends the control response to the rescue control unit 14. And a repair control unit 15 for performing the repair.

The broadcasting station 11 transmits the program on the satellite line 2a transmitted from the key station via the satellite device 10 to the satellite receiving device 5a of the earth station 17a, the switch 22 of the rescue program receiving end switch unit 7 and the television program switch unit. 4a switch 25 and the earth station 17b TV program switch section 4
The material program is also received from the broadcasting station 13 via the switch 34 of b, the backup terrestrial line 9, the switch 28 of the heterogeneous program prevention switch unit 8 and the switch 27 of the television program switch unit 4a. Here, for example, the inside of the triangle indicating the switch 22 is displayed in white, but this means that the operating state of the switch 22 indicates that the program signal of the satellite line 2a input from the satellite receiver 5a is displayed on the television program switch unit 4a. Indicates that it is in an operating state connected to be output. Further, the switch 25 is shown in black in the triangle indicating the switch, which means that the operating state of the switch 25 is that the signal of the program of the satellite line 2a input from the rescue program receiving end switch unit 7 is the outgoing line 18 Indicates that it is in an operating state in which it is connected to be output to.

Also, the broadcasting station 12 and the broadcasting station 13 are connected to the earth station 17b, and the programs of the satellite lines 1b to 3b transmitted from the key station via the satellite device 10 are received by the satellite receiving device 5b and the rescue program sending end switch. The unit 6 and the television program switch unit 4b are configured to be able to receive via the switches 35 to 37 or the switches 38 to 40.

 Next, the operation will be described.

In the rescue program receiving end switch unit 7 of the earth station 17a, the line monitoring control circuit detects the reception level and equipment failure of the satellite lines 1a to 3a.
It is monitored by 19, and in the case of a reception level and equipment failure, it is output to the rescue controller 14 as a satellite line failure. The relief control unit 14 periodically checks the satellite line status of the own station to the earth station 17b.
The remedy control unit 15 is notified. Further, the rescue program sending end switch unit 6 of the earth station 17b also monitors the reception level and equipment failure of the satellite lines 1b to 3b by the line monitoring control circuit 20. In the case of the reception level and equipment failure, it is regarded as a satellite line failure. It is output to the repair control unit 15. The rescue controller 15 periodically notifies the rescue controller 14 of the earth station 17a of the satellite channel status of the own station.

Now, when the line supervisory control circuit 19 of the rescue program receiving end switch unit 7 detects the satellite line failure of the satellite line 2a of the earth station 17a and outputs the information to the rescue controller 14, the rescue controller 14
Switch 24 of the outgoing line 18 of the TV program switch section 4a
The control state of 26 is checked to detect that the switch 25 is on and the satellite line 2a is in operation.

Next, the rescue control unit 14 is detected by the line supervisory control circuit 20 of the rescue program sending end switch unit 6 of the earth station 17b, and the rescue control unit 14 is detected.
Based on the information sent from 15 via control line 16,
The status of the presence or absence of a fault in the satellite line 2b is determined. Earth station 17b
If the satellite line 2b of 2 is normal, the rescue controller 14 first controls the switch 28 of the heterogeneous program prevention switch 8,
Disconnect the TV signal from the backup ground line 9,
It is possible to prevent different programs from being mixed in the material programs of the broadcasting station 11. After that, the relief control unit 14 controls the earth station through the control line 16.
The control request of the switch 32 of the switches 31 to 33 of the rescue program sending end switch unit 6 is sent to the rescue control unit 15 of 17b.

Upon receiving the control request, the rescue control unit 15 checks the state of the satellite line 2b of its own station again via the line monitoring control circuit 20, and if normal, the line monitoring control circuit 20 of the rescue program sending end switch unit 6 The switch 32 is controlled via. Relief controller
15 confirms that the control response of the switch 32 is normal,
A control completion response is returned to the repair control unit 14 via the line monitoring control circuit 20.

After receiving the control completion response from the rescue control unit 15, the rescue control unit 14 controls the switch 22 of the switches 21 to 23 of the rescue program receiving end switch unit 7 via the line monitoring control circuit 19. By this control, the earth station 17a receives the television program to be sent to the broadcasting station 11 from the television program received by the satellite line 2a in which the fault has been detected, and the earth station 17b receives it by the satellite line 2b, and the earth line for backup 9 It is possible to switch to the TV program transmitted via. TV programs sent via the backup ground line 9 are switched 2
2, it will be transmitted to the broadcasting station 11 via the switch 25.

Although the above description has been made in the case of the failure of the satellite line 2a, the same operation is performed in the case of the failure of the satellite lines 1a and 3a.

In this way, the satellite line failure can be automatically switched to the ground line instantaneously, and the satellite line failure can be relieved.

In addition, the backup terrestrial line can also be used for transmission of material programs when normal, and even if a failure occurs in the satellite line, it is possible to prevent other programs from being mixed into the material programs.

〔The invention's effect〕

As described above, according to the present invention, in a local station that selectively receives a program sent from a plurality of key stations via a satellite line, in the event of a satellite line fault currently being received, a backup site from an adjacent earth station is used. This has the effect that the program sent via the upper line can be instantaneously switched and the satellite line failure can be automatically relieved.

[Brief description of drawings]

FIG. 1 is a block diagram showing the system configuration of an embodiment of the present invention. 1a to 3a, 1b to 3b ... satellite line, 4a, 4b ... television program switch section, 5a, 5b ... satellite receiver, 6 ... rescue program sending end switch section, 7 ... rescue program receiving end switch section , 8
...... Different program prevention switch section, 9 ...... Backup ground line, 10 ・ ・ ・ Satellite equipment, 11 to 13 …… Broadcast station, 1
4,15 …… Relief control unit, 16 …… Control line, 17a, 17b …… Earth station, 18 …… Outgoing line, 19, 20 …… Line monitoring control path, 29 …… Outgoing line.

Claims (1)

[Claims] 1. A television program connected to a broadcasting station, further connected to a satellite by a plurality of satellite lines, and received from a satellite via a first satellite line which is one of the satellite lines. A first earth station for sending to a station is connected to the satellite through the plurality of satellite lines, like the first earth station, and receives the television program from the satellite through the first satellite line. In a television relay system including a second earth station that operates and a ground line that connects between the first earth station and the second earth station, the first earth station is A first line that detects a failure of the first satellite line when the first satellite line fails during operation, identifies the first satellite line that has become the failure, and outputs satellite line failure information Failure detection means, and a television program to be sent to the broadcasting station, And a rescue program receiving end switch for switching from a television program received by the satellite line to a television program received by the second earth station and sent through the terrestrial line, and output by being switched by the rescue program receiving end switch. A line selector switch for connecting a television program line to an output line to the broadcasting station, and receiving the satellite channel failure information, confirming that the line selector switch is in operation, and the second earth station. When the first satellite line being received by is normal, sending ground line connection request information requesting to send the television program being received by the second earth station to the ground line, A second control unit for controlling the rescue program receiving end switch when a control response to the ground line connection request is returned from the second earth station, wherein the second earth station is Second line fault detecting means for detecting the presence or absence of the first satellite line being received by the station, and sending out the television program received by the own station via the first satellite line to the terrestrial line. And a rescue program sending end switch for transmitting the presence / absence information of the fault of the first satellite line received by the own station, which is obtained from the second line fault detecting means, to the first control means, The land line connection request information is the first
A second control means for receiving the control signal from the control means, controlling the rescue program sending end switch, and sending a control response thereof to the first control means.
A television relay system characterized by comprising: