JPH078043B2 - TV relay system - Google Patents
TV relay systemInfo
- Publication number
- JPH078043B2 JPH078043B2 JP11429788A JP11429788A JPH078043B2 JP H078043 B2 JPH078043 B2 JP H078043B2 JP 11429788 A JP11429788 A JP 11429788A JP 11429788 A JP11429788 A JP 11429788A JP H078043 B2 JPH078043 B2 JP H078043B2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- television
- communication line
- broadcasting station
- satellite communication
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明はテレビ中継方式に関し、特に伝送路として衛星
通信回線と地上通信回線とを用いるテレビ中継におい
て、衛星通信回線を経由した場合の伝送遅延時間を自動
的に補正するテレビ中継方式に関する。Description: TECHNICAL FIELD The present invention relates to a television relay system, and in particular, in television relay using a satellite communication line and a terrestrial communication line as transmission lines, transmission delay when passing through the satellite communication line. The present invention relates to a TV relay system that automatically corrects time.
従来、通信回線を使用したテレビ中継方式は、キー放送
局のテレビ信号を地方放送局へ中継する場合に用いら
れ、通信回線としては衛星通信回線又は地上通信回線が
使用されている。Conventionally, a television relay system using a communication line is used when relaying a television signal from a key broadcasting station to a local broadcasting station, and a satellite communication line or a terrestrial communication line is used as the communication line.
地方放送局は、テレビ番組の切替時刻がくると、テレビ
番組の編成に従って、中継されてきた自局に必要なテレ
ビ番組のテレビ信号を受信し、自局で作成したテレビ番
組のテレビ信号と切替えてキー放送局のテレビ番組を放
送していた。When the time comes to switch the TV program, the local broadcasting station receives the TV signal of the TV program that is necessary for the local station that was relayed according to the organization of the TV program, and switches to the TV signal of the TV program created by itself. He was broadcasting a TV program from a key broadcasting station.
上述した従来のテレビ中継方式は、テレビ信号の伝送路
として使用する衛星通信回線の伝送遅延時間を考慮せ
ず、伝送路が衛星通信回線又は地上通信回線のいずれの
場合でも、受信したキー放送局のテレビ信号と自局のテ
レビ信号とを定められた時刻に切替えるのみであった。The above-mentioned conventional TV relay system does not consider the transmission delay time of the satellite communication line used as the transmission line of the TV signal, and the received key broadcasting station regardless of whether the transmission line is the satellite communication line or the terrestrial communication line. It was only to switch between the TV signal of and the TV signal of the own station at a predetermined time.
このため、キー放送局のテレビ信号が衛星通信回線を経
由した場合には、衛星通信回線の伝送遅延時間により、
キー放送局のテレビ信号は切替予定時間より遅れて受信
された。地方放送局のテレビ番組は、定められた切替時
刻に合わせて終了するようになっているので、キー放送
局の番組をのせたテレビ信号が受信されるまで、テレビ
放送が中継するという問題点があった。Therefore, when the TV signal of the key broadcasting station goes through the satellite communication line, the transmission delay time of the satellite communication line causes
The TV signal of the key broadcasting station was received after the scheduled switching time. Since the TV program of the local broadcasting station ends at the set switching time, there is a problem that the TV broadcasting is relayed until the TV signal carrying the program of the key broadcasting station is received. there were.
本発明の目的は、衛星通信回線を伝送路として使用した
とき、キー放送局のテレビ番組と地方放送局のテレビ番
組との切替えが、あらかじめ定めた通りに円滑に切替え
られるテレビ中継方式を提供することにある。It is an object of the present invention to provide a television relay system in which switching between a television program of a key broadcasting station and a television program of a local broadcasting station can be smoothly switched as predetermined when a satellite communication line is used as a transmission path. Especially.
本発明のテレビ中継方式は、送信側で衛星通信回線と地
上通信回線とを選択的に切替えていずれか一方に第１の
テレビ信号を送出し、受信側では受信した前記第１のテ
レビ信号を受信側のテレビ局に送出し、前記テレビ局で
受信された前記第１のテレビ信号が前記テレビ局で発生
される第２のテレビ信号と選択的に切替えられて放送の
ため送出されるテレビ中継方式において、 （Ａ）送信側に設けられ、前記第１のテレビ信号が衛星
通信回線又は地上通信回線のいずれを経由したか識別す
るために前記第１のテレビ信号に付加して用いる識別信
号を発振する識別信号発振回路、 （Ｂ）送信側に設けられ、衛星通信回線又は地上通信回
線のいずれかを経由して送信される前記第１のテレビ信
号に前記識別信号を付加する識別信号挿入回路、 （Ｃ）受信側に設けられ、受信信号から前記識別信号を
分離する識別信号分離回路、（Ｄ）受信側に設けられ、
分離された前記識別信号を検出し、送信されてきた前記
第１のテレビ信号が衛星通信回線又は地上通信回線のい
ずれを経由したか識別し、識別結果を示す検出信号を送
信する識別信号検出回路、 （Ｅ）前記検出信号を受信したとき、衛星通信回線によ
るテレビ信号の伝送遅延時間の補正を行うため、受信側
テレビ局の前記第２のテレビ信号と送信側から送信され
てきた前記第１のテレビ信号との切替時刻を前記伝送遅
延時間だけずらして前記第１及び第２のテレビ信号の切
替えを行うオンエアテレビ信号切替回路、 を備えて構成されている。In the television relay system of the present invention, the transmitting side selectively switches between the satellite communication line and the terrestrial communication line to send the first television signal to either one, and the receiving side sends the received first television signal. In a television relay system for transmitting to a receiving television station, the first television signal received by the television station is selectively switched to a second television signal generated by the television station and transmitted for broadcasting, (A) Identification that is provided on the transmission side and that oscillates an identification signal that is used in addition to the first television signal to identify whether the first television signal has passed through a satellite communication line or a terrestrial communication line A signal oscillating circuit, (B) an identification signal inserting circuit which is provided on the transmission side and adds the identification signal to the first television signal transmitted via either a satellite communication line or a terrestrial communication line, ) Provided in the receiving side, the identification signal separator circuit for separating said identification signal from the received signal, provided (D) receiving side,
An identification signal detection circuit that detects the separated identification signal, identifies whether the transmitted first television signal has passed through a satellite communication line or a terrestrial communication line, and transmits a detection signal indicating an identification result. (E) When the detection signal is received, in order to correct the transmission delay time of the television signal by the satellite communication line, the second television signal of the receiving television station and the first television signal transmitted from the transmitting side are received. An on-air television signal switching circuit for switching the first and second television signals by shifting the switching time with the television signal by the transmission delay time.
次に、本発明の実施例について図面を参照して説明す
る。Next, embodiments of the present invention will be described with reference to the drawings.
第１図は本発明の一実施例のブロック図である。FIG. 1 is a block diagram of an embodiment of the present invention.
第１図のテレビ中継方式は、自局が作成したテレビ番組
のキー放送局テレビ信号（第１のテレビ信号）15を地方
放送局７に送出するキー放送局６、衛星通信回線の使用
を示す衛星通信回線識別信号９を発振する識別信号発振
回路８、衛星通信回線識別信号９をキー放送局テレビ信
号15に付加する識別信号挿入回路10、キー放送局テレビ
信号15を通信衛星１に向け送信する衛星通信回線送信装
置２、送信されたキー放送局テレビ信号15を中継する通
信衛星１、通信衛星１から受信したキー放送局テレビ信
号15を地方放送局７に送出する衛星通信回線受信装置
３、キー放送局テレビ信号15から衛星通信回線識別信号
９を分離する識別信号分離回路11、衛星通信回線識別信
号９を検出し衛星通信回線使用検出信号13を送出する識
別信号検出回路12、キー放送局テレビ信号15を送信する
地上通信回線送信装置４、キー放送局テレビ信号15を地
方放送局７に送出する地上通信回線受信装置５、衛星通
信回線受信装置３又は地上通信回線受信装置５からキー
放送局テレビ信号15を受信し放送する地方放送局７から
構成されている。The TV relay system of FIG. 1 shows the use of the key broadcasting station 6 which sends out the key broadcasting station TV signal (first TV signal) 15 of the TV program created by the station to the local broadcasting station 7 and the satellite communication line. Identification signal oscillation circuit 8 for oscillating satellite communication line identification signal 9, identification signal insertion circuit 10 for adding satellite communication line identification signal 9 to key broadcasting station television signal 15, and transmitting key broadcasting station television signal 15 to communication satellite 1 Satellite communication line transmitting device 2, communication satellite 1 for relaying the transmitted key broadcasting station television signal 15, satellite communication line receiving device 3 for transmitting the key broadcasting station television signal 15 received from the communication satellite 1 to the local broadcasting station 7. , An identification signal separation circuit 11 for separating the satellite communication line identification signal 9 from the key broadcasting station television signal 15, an identification signal detection circuit 12 for detecting the satellite communication line identification signal 9 and transmitting a satellite communication line use detection signal 13, a key release Key from the terrestrial communication line transmitting device 4 for transmitting the station television signal 15, the key terrestrial communication line receiving device 5, the satellite communication line receiving device 3, or the terrestrial communication line receiving device 5 for transmitting the key broadcast station television signal 15 to the local broadcasting station 7. The broadcasting station comprises a local broadcasting station 7 which receives and broadcasts a television signal 15.
又、地方放送局７はキー放送局テレビ信号15と地方放送
局テレビ信号（第２のテレビ信号）16とを切替えるオン
エアテレビ信号切替回路14を備えている。The local broadcasting station 7 also includes an on-air television signal switching circuit 14 for switching between a key broadcasting station television signal 15 and a local broadcasting station television signal (second television signal) 16.
次に、動作を説明する。第２図はテレビの音声信号と識
別信号の伝送帯域の分割を示す周波数帯域図である。Next, the operation will be described. FIG. 2 is a frequency band diagram showing division of the transmission band of the television audio signal and the identification signal.
まず、キー放送局テレビ信号15がスイッチSW2,SW1、識
別信号挿入回路10及び衛星通信回線送信装置２を介して
衛星通信回線により送信されるときのみ、識別信号挿入
回路10において第２図に示す衛星通信回線識別信号９を
キー放送局テレビ信号15に挿入する。衛星通信回線識別
信号９はキー放送局テレビ信号15の音声帯域の上部周波
数帯域に挿入される。First, only when the key broadcasting station television signal 15 is transmitted through the satellite communication line via the switches SW2, SW1, the identification signal insertion circuit 10 and the satellite communication line transmitter 2, the identification signal insertion circuit 10 is shown in FIG. The satellite communication line identification signal 9 is inserted into the key broadcasting station television signal 15. The satellite communication line identification signal 9 is inserted in the upper frequency band of the audio band of the key broadcasting station television signal 15.
通信衛星１で中継され、衛星通信回線受信装置３及びス
イッチSW3,SW4を介してキー放送局テレビ信号15を受信
した地方放送局７においては、識別信号分離回路11にお
いて衛星通信回線識別信号９をとりだし、識別信号検出
回路12により衛星通信回線識別信号９の有無を検出して
衛星通信回線経由かどうかを判定する。判定結果は衛星
通信回線使用検出信号13として地方放送局７へ送出され
る。At the local broadcasting station 7 which is relayed by the communication satellite 1 and receives the key broadcasting station television signal 15 via the satellite communication line receiving device 3 and the switches SW3 and SW4, the identification signal separation circuit 11 transmits the satellite communication line identification signal 9 to the satellite communication line identification signal 9. Then, the presence / absence of the satellite communication line identification signal 9 is detected by the identification signal detection circuit 12 to determine whether the satellite communication line is used. The determination result is sent to the local broadcasting station 7 as a satellite communication line use detection signal 13.
第３図はテレビ信号の切替動作のタイミングを示す動作
図である。FIG. 3 is an operation diagram showing the timing of the switching operation of the television signal.
第３図はキー放送局テレビ信号15が地上通信回線を経由
した場合、すなわち地上通信回線送信装置４及び地上通
信回線受信装置５を介して送信された場合と、衛星通信
回線を経由した場合との切替時刻のずれを示している。
地上通信回線を経由した場合は、地方放送局７は、放送
していた自局作成のテレビ番組がのっている地方放送局
テレビ信号16（第３図のｂで示す）を、地上通信回線経
由で伝送されてきたキー放送局テレビ信号15に時刻T1で
切替え、地方放送局オンエアテレビ信号17として送出す
る。このとき、キー放送局テレビ信号15は、切替時刻T1
の瞬間にそれまでの番組がのっていない状態（第３図の
ｃで示す）から番組がのった状態（第３図のａで示す）
になり、切替時刻T1に番組の放送時間が終了した地方放
送局７の番組に続けてキー放送局６の番組が放送できる
ように調整されている。FIG. 3 shows the case where the key broadcasting station television signal 15 is transmitted through the terrestrial communication line, that is, the case where it is transmitted through the terrestrial communication line transmitter 4 and the terrestrial communication line receiver 5, and the case where it is transmitted through the satellite communication line. Shows the shift of the switching time of.
When passing through the terrestrial communication line, the local broadcast station 7 transmits the local broadcast station TV signal 16 (shown by b in FIG. 3) carrying the TV program created by the local station. At time T 1 , it switches to the key broadcasting station television signal 15 transmitted by way of and is transmitted as a local broadcasting station on-air television signal 17. At this time, the key broadcasting station TV signal 15 has the switching time T 1
At the moment of, there is no program (shown as c in FIG. 3) to a program that has been loaded (shown as a in FIG. 3).
The adjustment is made so that the program of the key broadcasting station 6 can be broadcasted following the program of the local broadcasting station 7 whose broadcast time has ended at the switching time T 1 .
それに対して、キー放送局テレビ信号15が衛星通信回線
を経由した場合は、衛星通信回線により伝送遅延時間TD
の遅れが生じる。このため、衛星通信回線使用検出信号
13を受信した地方放送局７は、地方放送局テレビ信号16
からキー放送局テレビ信号15への切替えのタイミングを
TDだけ遅らせて切替時刻T2でオンエアテレビ信号切替回
路14により切替えを行う。このとき、地方放送局テレビ
信号16にのせている番組の放送時間をあらかじめ調整し
ておき、切替時刻T2のときに番組が終了するようにして
おくと、地方放送局７の番組に続けてキー放送局６の番
組が円滑に放送される。On the other hand, when the key broadcasting station TV signal 15 passes through the satellite communication line, the transmission delay time T D
Will be delayed. Therefore, the satellite communication line use detection signal
The local broadcasting station 7 that has received 13 receives the local broadcasting station TV signal 16
From the key station to the TV signal 15
After switching by T D, switching is performed by the on-air television signal switching circuit 14 at switching time T 2 . At this time, if the broadcast time of the program placed on the local broadcast station TV signal 16 is adjusted in advance so that the program ends at the switching time T 2 , the program of the local broadcast station 7 will be continued. The program of the key broadcasting station 6 is smoothly broadcasted.
このように、キー放送局テレビ信号15が衛星通信回線を
経由して送信されてきた場合でも、地方放送局テレビ信
号16とキー放送局テレビ信号15との切替時に、地方放送
局７のテレビ番組とキー放送局６のテレビ番組との切替
えを円滑に行うことができる。As described above, even when the key broadcasting station TV signal 15 is transmitted via the satellite communication line, when the local broadcasting station TV signal 16 and the key broadcasting station TV signal 15 are switched, the television program of the local broadcasting station 7 is changed. And the TV program of the key broadcasting station 6 can be smoothly switched.
上記の説明では、地方放送局７が先に自局のテレビ番組
を放送しているときに、キー放送局６のテレビ番組に切
替えることで説明したが、先にキー放送局６のテレビ番
組を放送しているときに、地方放送局７のテレビ番組に
切替える場合では、キー放送局６のテレビ番組の放送が
衛星通信回線の伝送遅延時間だけずれて継続放送されて
いるにもかかわらず、地方放送局７のテレビ番組に切替
えられてしまうという問題点があった。しかし、この場
合も上記と同様に、切替時刻を伝送遅延時間TDだけずら
すことにより、キー放送局６のテレビ番組と地方放送局
７のテレビ番組との切替えを円滑に行うことができる。In the above description, when the local broadcasting station 7 is broadcasting the TV program of its own station first, the switching to the TV program of the key broadcasting station 6 has been described, but the TV program of the key broadcasting station 6 is switched to first. When switching to the television program of the local broadcasting station 7 during broadcasting, even if the broadcasting of the television program of the key broadcasting station 6 is continuously broadcast with a delay of the transmission delay time of the satellite communication line, There is a problem that the TV program of the broadcasting station 7 is switched to. However, also in this case, similarly to the above, by shifting the switching time by the transmission delay time T D , the switching between the television program of the key broadcasting station 6 and the television program of the local broadcasting station 7 can be smoothly performed.
以上説明したように、本発明は、受信したキー放送局テ
レビ信号が衛星通信回線を経由してきたか否かを検出す
ることにより、衛星通信回線経由の場合、地方放送局テ
レビ信号とキー放送局テレビ信号との切替時刻を、定め
られた時刻より衛星通信回線の伝送遅延時間だけずらす
ことができ、地方放送局のテレビ番組とキー放送局のテ
レビ番組を円滑に切替えることができるという効果を有
する。As described above, according to the present invention, by detecting whether or not the received key broadcasting station television signal has passed through the satellite communication line, the local broadcasting station television signal and the key broadcasting station television can be detected when the satellite communication line is used. The switching time with the signal can be shifted by the transmission delay time of the satellite communication line from the set time, and the effect is that the TV program of the local broadcasting station and the TV program of the key broadcasting station can be smoothly switched.
第１図は本発明の一実施例のブロック図、第２図はテレ
ビの音声信号と識別信号の伝送帯域の分割を示す周波数
帯域図、第３図はテレビ信号の切替動作のタイミングを
示す動作図である。 １……通信衛星、２……衛星通信回線送信装置、３……
衛星通信回線受信装置、４……地上通信回線送信装置、
５……地上通信回線受信装置、６……キー放送局、７…
…地方放送局、８……識別信号発振回路、９……衛星通
信回線識別信号、10……識別信号挿入回路、11……識別
信号分離回路、12……識別信号検出回路、13……衛星通
信回線使用検出信号、14……オンエアテレビ信号切替回
路、15……キー放送局テレビ信号、16……地方放送局テ
レビ信号、17……地方放送局オンエアテレビ信号。FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is a frequency band diagram showing division of a transmission band of a television audio signal and an identification signal, and FIG. 3 is an operation showing timing of a television signal switching operation. It is a figure. 1 ... communication satellite, 2 ... satellite communication line transmitter, 3 ...
Satellite communication line receiver, 4 ... Terrestrial communication line transmitter,
5 ... Terrestrial communication line receiver, 6 ... Key broadcasting station, 7 ...
… Regional broadcasting station, 8 …… Identification signal oscillation circuit, 9 …… Satellite communication line identification signal, 10 …… Identification signal insertion circuit, 11 …… Identification signal separation circuit, 12 …… Identification signal detection circuit, 13 …… Satellite Communication line use detection signal, 14 …… on-air TV signal switching circuit, 15 …… key broadcasting station TV signal, 16 …… local broadcasting station TV signal, 17 …… local broadcasting station on-air TV signal.
Claims (1)
選択的に切替えていずれか一方に第１のテレビ信号を送
出し、受信側では受信した前記第１のテレビ信号を受信
側のテレビ局に送出し、前記テレビ局で受信された前記
第１のテレビ信号が前記テレビ局で発生される第２のテ
レビ信号と選択的に切替えられて放送のため送出される
テレビ中継方式において、 （Ａ）送信側に設けられ、前記第１のテレビ信号が衛星
通信回線又は地上通信回線のいずれを経由したか識別す
るために前記第１のテレビ信号に付加して用いる識別信
号を発振する識別信号発振回路、 （Ｂ）送信側に設けられ、衛星通信回線又は地上通信回
線のいずれかを経由して送信される前記第１のテレビ信
号に前記識別信号を付加する識別信号挿入回路、 （Ｃ）受信側に設けられ、受信信号から前記識別信号を
分離する識別信号分離回路、 （Ｄ）受信側に設けられ、分離された前記識別信号を検
出し、送信されてきた前記第１のテレビ信号が衛星通信
回線又は地上通信回線のいずれを経由したか識別し、識
別結果を示す検出信号を送信する識別信号検出回路、 （Ｅ）前記検出信号を受信したとき、衛星通信回線によ
るテレビ信号の伝送遅延時間の補正を行うため、受信側
テレビ局の前記第２のテレビ信号と送信側から送信され
てきた前記第１のテレビ信号との切替時刻を前記伝送遅
延時間だけずらして前記第１及び第２のテレビ信号の切
替えを行うオンエアテレビ信号切替回路、 を備えたことを特徴とするテレビ中継方式。1. A transmitting side selectively switches between a satellite communication line and a terrestrial communication line to send a first television signal to either one, and a receiving side receives the received first television signal from a receiving side. In a television relay system for transmitting to a television station, the first television signal received by the television station is selectively switched to a second television signal generated by the television station, and is transmitted for broadcasting. An identification signal oscillating circuit that is provided on the transmitting side and oscillates an identification signal that is used in addition to the first television signal to identify whether the first television signal has passed through a satellite communication line or a terrestrial communication line. (B) an identification signal insertion circuit which is provided on the transmission side and adds the identification signal to the first television signal transmitted via either a satellite communication line or a terrestrial communication line, (C) a reception side Set up An identification signal separation circuit for separating the identification signal from the received signal, (D) the first television signal transmitted from the first television signal, which is provided on the receiving side, detects the separated identification signal, and is transmitted. An identification signal detection circuit that identifies which one of the terrestrial communication lines is used and transmits a detection signal indicating the identification result, (E) When the detection signal is received, corrects the transmission delay time of the television signal by the satellite communication line. To do so, the switching time between the second television signal of the receiving side television station and the first television signal transmitted from the transmitting side is shifted by the transmission delay time to switch between the first and second television signals. An on-air television signal switching circuit for performing a television relay system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11429788A JPH078043B2 (en) | 1988-05-10 | 1988-05-10 | TV relay system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11429788A JPH078043B2 (en) | 1988-05-10 | 1988-05-10 | TV relay system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01284086A JPH01284086A (en) | 1989-11-15 |
| JPH078043B2 true JPH078043B2 (en) | 1995-01-30 |
Family
ID=14634340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11429788A Expired - Fee Related JPH078043B2 (en) | 1988-05-10 | 1988-05-10 | TV relay system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH078043B2 (en) |
-
1988
- 1988-05-10 JP JP11429788A patent/JPH078043B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01284086A (en) | 1989-11-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |