JP3025918B2 - Program switching method - Google Patents
Program switching methodInfo
- Publication number
- JP3025918B2 JP3025918B2 JP3124228A JP12422891A JP3025918B2 JP 3025918 B2 JP3025918 B2 JP 3025918B2 JP 3124228 A JP3124228 A JP 3124228A JP 12422891 A JP12422891 A JP 12422891A JP 3025918 B2 JP3025918 B2 JP 3025918B2
- Authority
- JP
- Japan
- Prior art keywords
- program
- station
- signal
- satellite
- 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 - Lifetime
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Description
【０００１】[0001]
【産業上の利用分野】本発明はテレビジョンの番組切替
方式に関し、特に遠隔地の衛星通信地球局をコンピュー
タで制御する番組切替方式に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a program switching system for television, and more particularly to a program switching system for controlling a remote satellite communication earth station by a computer.
【０００２】[0002]
【従来の技術】従来、数十Ｋｍ程度離れた遠隔地の衛星
通信地球局をコンピュータで制御する番組切替方式は図
３に示す如き構成であった。2. Description of the Related Art Conventionally, a program switching system for controlling a satellite communication earth station at a remote place at a distance of about several tens of kilometers by a computer has a configuration as shown in FIG.
【０００３】図３において、１は送信ＴＶ信号の入力端
子、２は受信ＴＶ信号の出力端子、３は中継回線装置、
４はコンピュータを使用する主制御装置、５は通信用の
モデム、１１は中継回線装置、１２は番組伝送制御装
置、１３は送信装置、１４は受信装置、１５は分波器、
１６はアンテナ、１７は通信用のモデム、１８はコンピ
ュータを使用する従制御装置、２１は送信ＴＶ信号の入
力端子、２２は受信ＴＶ信号の出力端子、２３は番組伝
送制御装置、２４は送信装置、２５は受信装置、２６は
分波器、２７はアンテナ、２８は制御装置である。参照
番号が１〜５の各機器は主局に配置され、参照番号が１
１〜１８の各機器は遠隔地に設置された第１の衛星通信
地球局に配置され、参照番号が２１〜２７の各機器は車
載局等の第２の衛星通信地球局に配置され、第１の衛星
通信地球局と第２の衛星通信地球局との間でＴＶ番組の
切替えを行う。In FIG. 3, 1 is an input terminal of a transmission TV signal, 2 is an output terminal of a reception TV signal, 3 is a trunk line device,
4 is a main control device using a computer, 5 is a modem for communication, 11 is a relay line device, 12 is a program transmission control device, 13 is a transmitting device, 14 is a receiving device, 15 is a duplexer,
16 is an antenna, 17 is a modem for communication, 18 is a slave controller using a computer, 21 is an input terminal of a transmission TV signal, 22 is an output terminal of a reception TV signal, 23 is a program transmission control device, and 24 is a transmission device. , 25 are a receiving device, 26 is a duplexer, 27 is an antenna, and 28 is a control device. The devices with reference numbers 1 to 5 are arranged in the master station, and the devices with reference numbers 1
Each of the devices 1 to 18 is arranged in a first satellite communication earth station installed in a remote place, and each of the devices having reference numbers 21 to 27 is arranged in a second satellite communication earth station such as an on-vehicle station. The TV program is switched between the first satellite communication earth station and the second satellite communication earth station.
【０００４】図３を参照して、本従来例の動作を説明す
る。主局の入力端子１に加えられたＴＶ信号は中継回線
装置３で変換されて、中継回線を経て遠隔地にある第１
の衛星通信地球局へ送られる。送られてきた信号は中継
回線装置１１でＴＶ信号に変換されて、番組伝送制御装
置１２に入力される。番組伝送制御装置１２は、その送
信部に於いて、外部からのＴＸ ＯＦＦ制御信号を受け
てＴＶ信号の垂直ブランキング期間の特定のライン区間
に番組制御用のＱC 信号を重畳し、さらに、一定時間Ｄ
S 後に送信装置をオフにする制御信号を送出するととも
に、その受信部に於いては、外部からのＴＸ ＯＮ制御
信号を受けた後にＱC 信号を受信すると一定時間ＤR 後
に送信装置をオンにする制御信号を送出する機能を有す
る。Referring to FIG. 3, the operation of the conventional example will be described. The TV signal applied to the input terminal 1 of the main station is converted by the trunk line device 3, and is converted via the trunk line into the first remote terminal.
To the satellite earth station. The transmitted signal is converted into a TV signal by the relay line device 11 and input to the program transmission control device 12. Program transmission control apparatus 12, at its transmission section superimposes the Q C signal for program control to a particular line range of the vertical blanking interval of the TV signal receiving TX OFF control signal from the outside, further, Fixed time D
It sends out a control signal to turn off the transmission apparatus after S, the In the reception unit, to select the transmission apparatus after a predetermined time D R and receives the Q C signal after receiving the TX ON control signal from the outside And a function of transmitting a control signal.
【０００５】番組伝送制御装置１２の出力は送信装置１
３に入力される。送信装置１３は、入力信号でＩＦ帯搬
送波を変調する変調器（ＭＯＤ）、ＴＸ ＯＮ／ＴＸ
ＯＦＦ制御信号を受けて変調器出力信号をオンオフする
ＩＦ切替器、ＩＦ帯信号を送信周波数帯に変換する送信
周波数変換器（Ｕ／Ｃ）、及び、大電力増幅器（ＨＰ
Ａ）から構成される。送信装置１３に入力された信号で
変調されたＩＦ帯信号は送信周波数帯に周波数変換され
た後ＨＰＡで増幅され、分波器１５を経てアンテナ１６
から衛星に向けて送信される。The output of the program transmission control device 12 is
3 is input. The transmission device 13 includes a modulator (MOD) that modulates an IF band carrier with an input signal, a TX ON / TX
An IF switch for turning on / off a modulator output signal in response to an OFF control signal, a transmission frequency converter (U / C) for converting an IF band signal to a transmission frequency band, and a high power amplifier (HP)
A). The IF band signal modulated by the signal input to the transmission device 13 is frequency-converted into a transmission frequency band, amplified by the HPA, passed through the duplexer 15,
Transmitted to the satellite.
【０００６】衛星で周波数変換された信号は第２の衛星
通信地球局のアンテナ２７で受信され、分波器２６を経
て受信装置２５に入力される。受信装置２５は低雑音増
幅器（ＬＮＡ）、受信信号をＩＦ帯信号に周波数変換す
る受信周波数変換器（Ｄ／Ｃ）、及び、ＩＦ帯信号を復
調する復調器（ＤＥＭ）から構成される。受信装置２５
に入力された信号は、低雑音増幅された後、ＩＦ帯に周
波数変換され、復調器で復調される。復調されたＴＶ信
号は、番組伝送制御装置１２と同じ機能を有する番組伝
送制御装置２３を経て、出力端子２２へ出力される。The signal whose frequency has been converted by the satellite is received by the antenna 27 of the second earth station for satellite communication, and is input to the receiving device 25 via the duplexer 26. The receiving device 25 includes a low-noise amplifier (LNA), a receiving frequency converter (D / C) for converting a received signal into an IF band signal, and a demodulator (DEM) for demodulating the IF band signal. Receiving device 25
The signal input to is subjected to low-noise amplification, frequency conversion to an IF band, and demodulation by a demodulator. The demodulated TV signal is output to an output terminal 22 via a program transmission control device 23 having the same function as the program transmission control device 12.
【０００７】第２の衛星通信地球局の入力端子２１に加
えられたＴＶ信号は番組伝送制御装置２３に入力され、
その出力は送信装置１３と同じ構成の送信装置２４に入
力される。送信装置２４に入力された信号で変調された
ＩＦ帯信号は周波数変換された後ＨＰＡで増幅され、分
波器２６を経てアンテナ２７から衛星に向けて送信され
る。[0007] The TV signal applied to the input terminal 21 of the second satellite communication earth station is input to the program transmission control device 23,
The output is input to a transmission device 24 having the same configuration as the transmission device 13. The IF band signal modulated by the signal input to the transmission device 24 is frequency-converted, amplified by the HPA, and transmitted from the antenna 27 to the satellite via the duplexer 26.
【０００８】衛星で周波数変換された信号は第１の衛星
通信地球局のアンテナ１６で受信され、分波器１５を経
て受信装置２５と同じ構成の受信装置１４に入力され
る。受信装置１４に入力された信号は、低雑音増幅され
た後ＩＦ帯に周波数変換され、復調器で復調される。復
調されたＴＶ信号は番組伝送制御装置１２を経て中継回
線装置１１へ入力される。中継回線装置１１へ加えられ
たＴＶ信号は中継回線装置１１で変換されて中継回線を
経て主局の中継回線装置３へ送られ、そこでＴＶ信号に
変換されて出力端子２に出力される。The signal frequency-converted by the satellite is received by the antenna 16 of the first satellite communication earth station, and is input to the receiving device 14 having the same configuration as the receiving device 25 via the duplexer 15. The signal input to the receiving device 14 is frequency-converted into an IF band after low-noise amplification, and is demodulated by a demodulator. The demodulated TV signal is input to the relay line device 11 via the program transmission control device 12. The TV signal applied to the trunk line device 11 is converted by the trunk line device 11 and sent to the trunk line device 3 of the main station via the trunk line, where it is converted into a TV signal and output to the output terminal 2.
【０００９】コンピュータを使用する主制御装置４は主
局に設置され、主局の中継回線装置３の監視制御を行う
とともに、モデム５及び１７を介して第１の衛星通信地
球局の従制御装置１８と接続される。第１の衛星通信地
球局内の各装置は従制御装置１８により監視制御され
る。第２の衛星通信地球局内の各装置は制御装置２８に
より監視制御される。A main controller 4 using a computer is installed in the main station, monitors and controls the trunk line device 3 of the main station, and controls the slave controller of the first satellite earth station via modems 5 and 17. 18 is connected. Each device in the first satellite earth station is monitored and controlled by the slave controller 18. Each device in the second satellite earth station is monitored and controlled by the controller 28.
【００１０】今、第１の衛星通信地球局からＴＶ番組を
送出中であり、第２の衛星通信地球局からのＴＶ番組に
切替える場合、まず主制御装置４からＴＸ ＯＦＦ制御
信号を送出する。ＴＸ ＯＦＦ制御信号はモデム５及び
１７を経て従制御装置１８から番組伝送制御装置１２に
入力される。ＴＸ ＯＦＦ制御信号が入力されると番組
伝送制御装置１２の送信部に於いて、ＱC 信号をＴＶ信
号に重畳し、時間ＤS 後に送信装置１３をオフにする制
御信号を送出して衛星への送信出力をオフにする。[0010] Now, a TV program is being transmitted from the first satellite communication earth station, and when switching to a TV program from the second satellite communication earth station, the main control unit 4 first sends a TX OFF control signal. The TX OFF control signal is input from the slave controller 18 to the program transmission controller 12 via the modems 5 and 17. In the TX OFF control signal is input to the transmitting unit of the program transmission control apparatus 12 superimposes the Q C signal to the TV signal, and transmits a control signal to turn off the transmitting device 13 after a time D S Satellite Turn off the transmission output of.
【００１１】第２の衛星通信地球局では、あらかじめオ
ーダーワイヤ電話等の連絡を主局から受けて、制御装置
２８からＴＸ ＯＮ制御信号を番組伝送制御装置２３に
送出し待機する。その後第２の衛星通信地球局で衛星か
らのＴＶ信号を受信すると、番組伝送制御装置２３の受
信部ではＱC 信号を検出し、ＤR2時間後に送信装置２４
をオンにする制御信号を送出して衛星への送信出力をオ
ンとしてＴＶ番組の切替を行う。第１及び第２の衛星通
信地球局から衛星までの電波の伝播時間をそれぞれｔ1
及びｔ2 とすると、次式が成立すれば第１及び第２の衛
星通信地球局のＴＶ番組が衛星上で同一時刻に切替わる
ことになる。The second satellite communication earth station receives a notification such as an order wire telephone from the main station in advance, sends a TX ON control signal from the control device 28 to the program transmission control device 23, and waits. Thereafter, when the second satellite communication earth station receives the TV signal from the satellite, the receiving section of the program transmission control device 23 detects the QC signal, and after the DR2 time, the transmitting device 24
Is turned on, the transmission output to the satellite is turned on, and the TV program is switched. The propagation times of radio waves from the first and second satellite communication earth stations to the satellites are respectively t 1
And t 2 , the TV program of the first and second satellite communication earth stations is switched on the satellite at the same time if the following equation is satisfied.
【００１２】 ＤS ＋ｔ1 ＝ｔ1 ＋ｔ2 ＋ＤR2＋ｔ2 ……（１） （１）式の左辺は、ＴＸ ＯＦＦ制御信号を送出してか
ら衛星上で第１の衛星通信地球局のＴＶ番組がオフとな
るまでの時間である。又、（１）式の右辺のｔ1 ＋ｔ2
はＴＸ ＯＦＦ制御信号を送出してから第２の衛星通信
地球局でＱC 信号を検出するまでの時間であり、ＤR2＋
ｔ2 はＱC 信号を検出してから衛星上で第２の衛星通信
地球局のＴＶ番組がオンとなるまでの時間である。以上
の如く、（１）式の右辺はＴＸ ＯＦＦ制御信号を送出
してから衛星上で第２の衛星通信地球局のＴＶ番組がオ
ンとなるまでの時間である。（１）式から下記の（２）
式を得る。[0012] D S + t 1 = t 1 + t 2 + D R2 + t 2 ...... (1) (1) equation left side, after sending the TX OFF control signal of the first satellite earth station on a satellite TV This is the time until the program is turned off. Also, t 1 + t 2 on the right side of equation (1)
Is the time to detect the Q C signal at a second satellite earth station after sending the TX OFF control signal, D R2 +
t 2 is the time from the detection of the Q C signal to a second satellite earth station of the TV program is turned on on the satellite. As described above, the right side of the equation (1) is the time from when the TX OFF control signal is transmitted to when the TV program of the second satellite communication earth station is turned on on the satellite. From equation (1), the following (2)
Get the expression.
【００１３】 ＤR2＝ＤS −２ｔ2 ……（２） すなわち、ＤS を一定時間とすれば、次発局では（２）
式を満足する様に時間ＤR を設定すれば、衛星上での同
一時刻にＴＶ番組が切替わる。D R2 = D S −2t 2 (2) That is, assuming that D S is a fixed time, (2)
By setting the time D R so as to satisfy the formula, TV program is switched at the same time on the satellite.
【００１４】次に、第２の衛星通信地球局からＴＶ番組
を送出中であり、第１の衛星通信地球局からのＴＶ番組
に切替える場合は、前述と逆の手順により衛星上で同一
時刻に切替わることになる。この場合には、次式の成立
することが必要となる。Next, when a TV program is being transmitted from the second satellite communication earth station and switching to a TV program from the first satellite communication earth station is performed at the same time on the satellite by the procedure reverse to that described above. Will be switched. In this case, the following equation must be satisfied.
【００１５】 ＤS ＋ｔ2 ＝ｔ2 ＋ｔ1 ＋ＤR1＋ｔ1 ……（３） 時間ＤR1は番組伝送制御装置１２の受信部のＤR の設定
時間である。（３）式から下記の（４）式を得る。[0015] a D S + t 2 = t 2 + t 1 + D R1 + t 1 ...... (3) time D R1 is set time D R of the receiving portion of the program transmission control device 12. The following equation (4) is obtained from the equation (3).
【００１６】 ＤR1＝ＤS −２ｔ1 ……（４） （２）式及び（４）式から、各地球局が自局と衛星との
間の伝播時間の２倍を一定時間ＤS から差引いた値を自
局のＤR の設定時間とすれば、ＴＶ番組の切替えが衛星
上でずれ及び重なりなく行われることになる。[0016] D from R1 = D S -2t 1 ...... ( 4) (2) and Formula (4) below, the predetermined time D S twice the propagation time between each earth station is own station and satellite if the value obtained by subtracting the set time D R of the own station, so that the switching of TV program is performed without misalignment and overlap on the satellite.
【００１７】[0017]
【発明が解決しようとする課題】この従来の番組切替方
式では、コンピュータを使用した制御装置を用いている
為、主局と遠隔地に設置された衛星通信地球局との制御
・監視信号の受渡しに数秒程度の時間がかかることもま
れではない。又、主局から遠隔地の衛星通信地球局への
制御信号の伝送時間及び遠隔地の衛星通信地球局から主
局への監視信号の伝送時間は、コンピュータ内の処理時
間により左右される為、０．５〜１秒程度のばらつきが
生ずる。これらの原因のため、主局からＴＸ ＯＦＦ制
御信号を送出しても、遠隔地の衛星通信地球局の送出装
置の送信出力がオフとなる正確な時間はわからないこと
になる。又、遠隔地の衛星通信地球局から送信する場合
にも、遠隔地の衛星通信地球局の番組伝送制御装置の受
信部でＱC 信号を受信した後、時間ＤR 後に送信装置が
オンになるが、主局ではＱC 信号を受信した情報を制御
装置を介して得ている為、送信出力がオンとなる正確な
時間はわからないことになる。送信出力がオンとなる時
間及びオフとなる時間のうち特に送信出力がオンとなる
時間は、主局にとって番組製作上重要である。例えば、
主局から送出中に挿入された他局の番組から主局の番組
に切替えたり、主局からのコマーシャル番組を挿入する
タイミングを正確に知る必要があるからである。In this conventional program switching method, since a control device using a computer is used, the transfer of control / monitoring signals between a main station and a satellite communication earth station installed at a remote place is performed. It is not unusual for it to take several seconds. Also, the transmission time of the control signal from the master station to the remote satellite communication earth station and the transmission time of the monitoring signal from the remote satellite communication earth station to the master station are affected by the processing time in the computer. A variation of about 0.5 to 1 second occurs. Due to these causes, even when the TX OFF control signal is transmitted from the main station, the exact time at which the transmission output of the transmitting device of the remote satellite communication earth station is turned off cannot be known. Further, when transmitting from the remote satellite earth station may, after receiving a Q C signal at the receiving end of the program transmission control apparatus for a remote satellite earth station, the transmitter is turned on after a time D R However, since the master station obtains the information on the reception of the QC signal via the control device, the exact time at which the transmission output is turned on cannot be known. Of the time when the transmission output is turned on and the time when the transmission output is turned off, particularly the time when the transmission output is turned on is important for the master station in program production. For example,
This is because it is necessary to switch from a program of another station inserted during transmission from the main station to a program of the main station, or to accurately know the timing of inserting a commercial program from the main station.
【００１８】以上説明したように従来の番組切替方式で
は、遠隔地の衛星通信地球局の送信出力がオンとなる時
間を主局で正確に知ることが出来ないという問題点があ
った。As described above, the conventional program switching method has a problem that the main station cannot accurately know the time when the transmission output of the remote satellite communication earth station is turned on.
【００１９】[0019]
【課題を解決するための手段】本発明の番組切替方式
は、主局には第１の中継回線装置、コンピュータを使用
した主制御装置、及び第１の通信用モデムを備え、前記
主局の遠隔地に設置された第１の衛星通信地球局には第
２の中継回線装置、第１の番組伝送制御装置、第１の送
信装置、第１の受信装置、第１の分波器、第１のアンテ
ナ、第２の通信用モデム、及びコンピュータを使用した
従制御装置を備え、前記主局からのテレビジョン信号を
前記第１及び第２の中継回線装置ならびに前記第１及び
第２の通信用モデムを用いて前記第１の衛星通信地球局
へ伝送して前記第１の衛星通信地球局から衛星へ向けて
送信し、前記衛星からの折返しの信号を第２の番組伝送
制御装置を備えた第２の衛星通信地球局で受信し、この
第２の衛星通信地球局から前記衛星へ向けて送信された
テレビジョン信号を前記第１の衛星通信地球局で受信し
て前記第１及び第２の中継回線装置ならびに前記第１及
び第２の通信用モデムを用いて前記主局へ伝送し、前記
第１及び第２の番組伝送制御装置のうち一方がテレビジ
ョン信号に重畳して番組制御用信号を送出した後前記一
方に対応してあらかじめ定めた第１の時間経過後に前記
一方が属する衛星通信地球局の送信出力をオフにし、他
方が前記衛星を介して前記番組制御用信号を受信した後
前記他方に対応してあらかじめ定めた第２の時間経過後
に前記他方が属する衛星通信地球局の送信出力をオンし
て前記主局と前記第２の衛星通信地球局との間でテレビ
ジョン番組の切替を行う番組切替方式に於いて、前記主
局に分配増幅器と第３の番組伝送制御装置とを備え、前
記第１の中継回線装置の受信出力に前記分配増幅器の入
力端を接続し、前記分配増幅器の２出力のうち一方に前
記第３の番組伝送制御装置を接続し、この第３の番組伝
送制御装置が前記番組制御用信号を受信した後前記第２
の時間経過後に出力する送信オン制御信号を前記第１の
衛星通信地球局の前記第１の送信装置の送信出力がオン
となる時間として使用する。According to a program switching method of the present invention, a main station is provided with a first trunk line device, a main control device using a computer, and a first communication modem. A first satellite communication earth station installed in a remote place has a second relay line device, a first program transmission control device, a first transmitting device, a first receiving device, a first duplexer, And a slave control device using a computer, and transmitting a television signal from the master station to the first and second relay line devices and the first and second communication devices. And a second program transmission control device for transmitting a signal from the first satellite communication earth station to the satellite by using the modem for transmission to the first satellite communication earth station and transmitting the return signal from the satellite. Received by the second satellite communication earth station, The first satellite communication earth station receives a television signal transmitted to the satellite from the first satellite communication earth station and uses the first and second relay line devices and the first and second communication modems to receive the television signal. After transmitting to the main station, one of the first and second program transmission control devices transmits a program control signal superimposed on the television signal, and then a first time elapse determined in advance corresponding to the one. Later, the transmission output of the satellite communication earth station to which the one belongs belongs is turned off, and after the other receives the program control signal via the satellite, after the second time predetermined corresponding to the other elapses, the other becomes In a program switching system in which a transmission output of a satellite communication earth station to which the satellite station belongs is switched on to switch a television program between the master station and the second satellite communication earth station, a distribution amplifier and a second amplifier are connected to the master station. 3 program transmission control An input terminal of the distribution amplifier is connected to a reception output of the first trunk line device, and the third program transmission control device is connected to one of two outputs of the distribution amplifier. 3 after the program transmission control device receives the program control signal.
Is used as the time when the transmission output of the first transmitting device of the first satellite communication earth station is turned on.
【００２０】又、本発明の番組切替方式は、前記主局に
テレビジョン信号切替器、第４の番組伝送制御装置、第
２の送信装置、第２の受信装置、第２の分波器、及び第
２のアンテナを含み、前記主局からのテレビジョン信号
を前記テレビジョン信号切替器で前記主局向けと前記第
１の衛星通信地球局向けとに切替えて前記主局又は前記
第１の衛星通信地球局のいずれか一方にて送受信するサ
イトダイバーシティシステムを構成することもできる。Further, the program switching system of the present invention is characterized in that the main station includes a television signal switch, a fourth program transmission control device, a second transmitting device, a second receiving device, a second duplexer, And a second antenna, wherein the television signal from the master station is switched by the television signal switch between the master station and the first satellite communication earth station, and the master station or the first antenna is switched. It is also possible to configure a site diversity system for transmitting and receiving at any one of the satellite communication earth stations.
【００２１】[0021]
【実施例】次に本発明について図面を参照して説明す
る。DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.
【００２２】図１は本発明の第１の実施例を示すブロッ
ク図である。FIG. 1 is a block diagram showing a first embodiment of the present invention.
【００２３】図１に示す実施例は、図３に示す従来例の
主局に番組伝送制御装置６及び分配増幅器７を付加して
構成されている。分配増幅器７は、中継回線装置３が変
換出力したＴＶ信号を受け、２つの出力のうち一方を受
信ＴＶ信号の出力端子２に出力し、他方を番組伝送制御
装置６へ入力する。The embodiment shown in FIG. 1 is configured by adding a program transmission control device 6 and a distribution amplifier 7 to the main station of the conventional example shown in FIG. The distribution amplifier 7 receives the TV signal converted and output by the relay line device 3, outputs one of the two outputs to the output terminal 2 of the received TV signal, and inputs the other to the program transmission control device 6.
【００２４】ＴＶ番組の送出を第１の衛星通信地球局か
ら第２の衛星通信地球局へ切替える場合の動作は、図３
の従来例におけると同じである。The operation for switching the transmission of the TV program from the first satellite communication earth station to the second satellite communication earth station is shown in FIG.
Is the same as in the conventional example.
【００２５】ＴＶ番組の送出を第２の衛星通信地球局か
ら第１の衛星通信地球局へ切替える場合は、第２の衛星
通信地球局において制御装置２８からＴＸ ＯＦＦ制御
信号を番組伝送制御装置２３へ送出する。ＴＸ ＯＦＦ
制御信号が入力されると番組伝送制御装置２の送信部で
はＱC 信号をＴＶ信号に重畳し、時間ＤS 後に送信装置
２４をオフする制御信号を送出して衛星への送信出力を
オフにする。When the transmission of a TV program is switched from the second satellite communication earth station to the first satellite communication earth station, the second satellite communication earth station transmits a TX OFF control signal from the control device 28 to the program transmission control device 23. Send to TX OFF
When the control signal is input in the transmission section of the program transmission control device 2 superimposes the Q C signal to the TV signal, turns off the transmission output of sending a control signal to turn off the transmitting device 24 after a time D S Satellite I do.
【００２６】第１の衛星通信地球局では、あらかじめオ
ーダワイヤ電話等の連絡を第２の衛星通信地球局から受
けて、主制御装置４からＴＸ ＯＮ制御信号を番組伝送
制御装置６及び１２へ送出して待機する。その後、第１
の衛星通信地球局で衛星からのＴＶ信号を受信すると、
番組伝送制御装置１２の受信部では、ＱC 信号を検出
し、時間ＤR1後に送信装置１３をオンする制御信号を送
出して衛星への送信出力をオンとしてＴＶ番組の切替え
を行う。さらに、第１の衛星通信地球局からの受信ＴＶ
信号は中継回線装置１１及び３を経て分配増幅器７へ入
力され、その出力の１つは番組伝送制御装置６の受信部
に入力される、番組伝送制御装置６の受信部でも、ＱC
信号を検出し、時間ＤR1後に送信装置をオンする為の制
御信号を送出する。In the first satellite communication earth station, a communication such as an order wire telephone is received from the second satellite communication earth station in advance, and a TX ON control signal is transmitted from the main controller 4 to the program transmission controllers 6 and 12. Wait. Then the first
When a satellite communication earth station receives a TV signal from a satellite,
The receiving portion of the program transmission control apparatus 12 detects the Q C signal, and switches the TV program transmission output to the satellite as an on and sends a control signal to turn on the transmitting device 13 after a time D R1. Further, the reception TV from the first satellite earth station
Signal is input to the distribution amplifier 7 via a trunk line 11 and 3, one of its output is inputted to the reception section of the program transmission control device 6, in the receiving portion of the program transmission control apparatus 6, Q C
A signal is detected, and a control signal for turning on the transmitting device is transmitted after a time DR1 .
【００２７】この番組伝送制御装置６からの制御信号
は、番組伝送制御装置１２からの同じ制御信号と比べる
と、第１の衛星通信地球局と主局との間の距離分のＴＶ
信号の伝送時間分の遅れが生ずることになるが、その遅
れは、両局間の距離が数十Ｋｍとしてたかだか１００〜
２００μｓにすぎない。従って、この番組伝送制御装置
６からの送信装置をオンにする為の制御信号を主局から
の番組の送信タイミングとして使用すれば、図３に示す
従来の番組切替方式の様に遠隔地からの制御信号をコン
ピュータを使用した制御装置を経由して利用する場合に
比べて、送信出力がオンとなる正確な時間を主局に於い
て知ることが出来る。The control signal from the program transmission control device 6 is different from the same control signal from the program transmission control device 12 in the TV signal for the distance between the first satellite communication earth station and the main station.
A delay corresponding to the signal transmission time occurs, but the delay is at most 100 to 100 km when the distance between the two stations is several tens km.
Only 200 μs. Therefore, if a control signal for turning on the transmission device from the program transmission control device 6 is used as the transmission timing of the program from the main station, it can be transmitted from a remote location as in the conventional program switching method shown in FIG. Compared to the case where the control signal is used via a control device using a computer, the master station can know the exact time at which the transmission output is turned on.
【００２８】又、主局と第１の衛星通信地球局との間の
距離は固定であるので、これら両局間のＴＶ信号伝送時
間も固定であり、その固定時間を主局の番組伝送制御装
置６の設定時間ＤR1から差引いて設定すれば、送信出力
がオンとなるより正確な時間を主局に於いて知ることが
出来る。Further, since the distance between the main station and the first satellite communication earth station is fixed, the TV signal transmission time between these two stations is also fixed, and the fixed time is determined by the program transmission control of the main station. it is set by subtracting from the set time D R1 of the apparatus 6 can be known at the main station a precise time from the transmission output is turned on.
【００２９】図２は本発明をサイトダイバーシティシス
テムに応用した第２の実施例を示すブロック図である。FIG. 2 is a block diagram showing a second embodiment in which the present invention is applied to a site diversity system.
【００３０】図２において、参照番号が１〜８及び３１
〜３５の各機器は主局に配置され、参照番号が１１〜１
８の各機器は図１の実施例におけると同様に遠隔地に設
置された第１の衛星通信地球局に配置され、参照番号が
２１〜２７の各機器は図１の実施例におけると同様に第
２の衛星通信地球局に配置されている。主局と第１の衛
星通信地球局とでサイトダイバーシティシステムを構成
しており、降雨減衰が規定値を越えた場合にはこれら両
局を切替えて回線不稼働率を低くすることが出来る。In FIG. 2, reference numerals 1 to 8 and 31
To 35 are arranged in the main station and reference numbers 11 to 1 are assigned.
Each of the devices 8 is located at the first satellite communication earth station installed in the remote place as in the embodiment of FIG. 1, and each of the devices with reference numerals 21 to 27 is the same as in the embodiment of FIG. It is located at a second satellite earth station. A site diversity system is configured by the main station and the first satellite communication earth station. When rainfall attenuation exceeds a specified value, both stations can be switched to reduce the line non-operation rate.
【００３１】第１及び第２の衛星通信地球局の構成は図
１の実施例におけると同じである。主局に於いて、１は
送信ＴＶ信号の入力端子、２は受信ＴＶ信号の出力端
子、３は中継回線装置、４はコンピュータを使用した主
制御装置、５は通信用のモデム、６は番組伝送制御装
置、７は分配増幅器、８は主局と第１の衛星通信地球局
とのＴＶ信号を切替えるＴＶ信号切替器、３１は番組伝
送制御装置、３２は送信装置、３３は受信装置、３４は
分波器、３５はアンテナである。The structure of the first and second satellite communication earth stations is the same as in the embodiment of FIG. In the main station, 1 is an input terminal of a transmission TV signal, 2 is an output terminal of a reception TV signal, 3 is a trunk line device, 4 is a main control device using a computer, 5 is a communication modem, 6 is a program. A transmission control device, 7 is a distribution amplifier, 8 is a TV signal switch for switching a TV signal between the main station and the first satellite communication earth station, 31 is a program transmission control device, 32 is a transmitting device, 33 is a receiving device, 34 Is a duplexer, and 35 is an antenna.
【００３２】主局の入力端子１に加えられたＴＶ信号は
ＴＶ信号切替器８で主局又は第１の衛星通信地球局のど
ちらへ送出するかを切替えられる。主局へ送出する場合
はＴＶ信号切替器８の出力は番組伝送制御装置３１へ入
力される。番組伝送制御装置３１の出力は送信装置３２
に入力される。送信装置３２の出力の送信信号は分波器
３４を経てアンテナ３５から衛星に向けて送信される。
衛星で周波数変換された信号は第２の衛星通信地球局で
受信される。又、第２の衛星通信地球局からの送信信号
は衛星で周波数変換され主局のアンテナ３５で受信され
分波器３４を経て受信装置３３に入力される。受信装置
３３で復調されたＴＶ信号は番組伝送制御装置３１を経
て、ＴＶ信号切替器８を通り、出力端子２へ出力され
る。The TV signal applied to the input terminal 1 of the master station is switched by the TV signal switch 8 between the master station and the first satellite communication earth station. When transmitting to the main station, the output of the TV signal switch 8 is input to the program transmission control device 31. The output of the program transmission control device 31 is
Is input to A transmission signal output from the transmission device 32 is transmitted from the antenna 35 to the satellite via the duplexer 34.
The signal frequency-converted by the satellite is received by the second satellite earth station. The transmission signal from the second satellite communication earth station is frequency-converted by the satellite, received by the antenna 35 of the main station, and input to the receiving device 33 via the duplexer 34. The TV signal demodulated by the receiving device 33 passes through the program transmission control device 31, passes through the TV signal switch 8, and is output to the output terminal 2.
【００３３】第１の衛星通信地球局へ送出する場合は、
入力端子１に加えられたＴＶ信号はＴＶ信号切替器８で
切替えて中継回線装置３へ入力され、第１の衛星通信地
球局へ送られる。又第１の衛星通信地球局からの受信信
号は中継回線装置３で変換されて分配増幅器７へ入力さ
れる。分配増幅器７の出力のうち１つはＴＶ信号切替器
８へ入力され、そこで切替えられて出力端子２に出力さ
れる。分配増幅器７の他の出力は番組伝送制御装置６へ
入力される。When transmitting to the first satellite communication earth station,
The TV signal applied to the input terminal 1 is switched by the TV signal switch 8 and input to the relay line device 3 to be sent to the first satellite earth station. A signal received from the first satellite communication earth station is converted by the relay line device 3 and input to the distribution amplifier 7. One of the outputs of the distribution amplifier 7 is input to the TV signal switch 8, where it is switched and output to the output terminal 2. The other output of the distribution amplifier 7 is input to the program transmission control device 6.
【００３４】コンピュータを使用する主制御装置４は主
局に設置され、主局の各装置の監視制御を行うとともに
モデム５を介して第１の衛星通信地球局内の各装置の監
視制御を行う。A main controller 4 using a computer is installed in the main station, monitors and controls each device of the main station, and monitors and controls each device in the first satellite earth station via the modem 5.
【００３５】番組切替動作については、第１の衛星通信
地球局を経由する番組切替えは、ＴＶ信号切替器８が追
加になった他は図１の実施例におけると同じである。主
局から送信する場合の番組切替えは、番組伝送制御装置
３１が同一局内に設置されるため、送信装置３２をオン
する為の制御信号を主局からの送信タイミングとして利
用すれば、コンピュータを使用した制御装置を経由しな
いので、制御時間のばらつきが入らず、送信出力がオン
となる正確な時間を主局に於いて知ることが出来る。With respect to the program switching operation, the program switching via the first satellite earth station is the same as in the embodiment of FIG. 1 except that a TV signal switch 8 is added. Program switching when transmitting from the main station uses a computer if the control signal for turning on the transmitting device 32 is used as transmission timing from the main station because the program transmission control device 31 is installed in the same station. Since the control does not pass through the control device, there is no variation in the control time, and the accurate time at which the transmission output is turned on can be known in the master station.
【００３６】以上述べた様に、図２に示すサイトダイバ
ーシティシステムにおいても、本発明の番組切替方式に
よれば、主局あるいは第１の衛星通信地球局のいずれか
ら送信する場合にも、送信出力がオンとなる正確な時間
を主局に於いて知ることが出来る。As described above, even in the site diversity system shown in FIG. 2, according to the program switching system of the present invention, the transmission output is not limited to the transmission from either the master station or the first satellite earth station. The exact time at which is turned on can be known at the master station.
【００３７】[0037]
【発明の効果】以上説明したように本発明は、遠隔地に
設置された衛星通信地球局に対応する番組伝送制御装置
を主局側にも備える様にしたので、送信出力がオンとな
る正確な時間を主局に於いて知ることが出来るという効
果がある。As described above, according to the present invention, since the program transmission control device corresponding to the satellite communication earth station installed in the remote place is also provided on the master station side, the transmission output can be accurately turned on. There is an effect that the master station can know a proper time.
【図１】本発明の第１の実施例のブロック図である。FIG. 1 is a block diagram of a first embodiment of the present invention.
【図２】本発明の第２の実施例のブロック図である。FIG. 2 is a block diagram of a second embodiment of the present invention.
【図３】従来の番組切替方式のブロック図である。FIG. 3 is a block diagram of a conventional program switching method.
１，２１ 送信ＴＶ信号入力端子 ２，２２ 受信ＴＶ信号出力端子 ３，１１ 中継回線装置 ４ 主制御装置 ５，１７ モデム ６，１２，２３，３１ 番組伝送制御装置 ７ 分配増幅器 ８ ＴＶ信号切替器 １３，２４，３２ 送信装置 １４，２５，３３ 受信装置 1,21 transmission TV signal input terminal 2,22 reception TV signal output terminal 3,11 trunk line device 4 main control device 5,17 modem 6,12,23,31 program transmission control device 7 distribution amplifier 8 TV signal switch 13 , 24,32 Transmitter 14,25,33 Receiver
Claims (2)
ータを使用した主制御装置、及び第１の通信用モデムを
備え、前記主局の遠隔地に設置された第１の衛星通信地
球局には第２の中継回線装置、第１の番組伝送制御装
置、第１の送信装置、第１の受信装置、第１の分波器、
第１のアンテナ、第２の通信用モデム、及びコンピュー
タを使用した従制御装置を備え、前記主局からのテレビ
ジョン信号を前記第１及び第２の中継回線装置ならびに
前記第１及び第２の通信用モデムを用いて前記第１の衛
星通信地球局へ伝送して前記第１の衛星通信地球局から
衛星へ向けて送信し、前記衛星からの折返しの信号を第
２の番組伝送制御装置を備えた第２の衛星通信地球局で
受信し、この第２の衛星通信地球局から前記衛星へ向け
て送信されたテレビジョン信号を前記第１の衛星通信地
球局で受信して前記第１及び第２の中継回線装置ならび
に前記第１及び第２の通信用モデムを用いて前記主局へ
伝送し、前記第１及び第２の番組伝送制御装置のうち一
方がテレビジョン信号に重畳して番組制御用信号を送出
した後前記一方に対応してあらかじめ定めた第１の時間
経過後に前記一方が属する衛星通信地球局の送信出力を
オフにし、他方が前記衛星を介して前記番組制御用信号
を受信した後前記他方に対応してあらかじめ定めた第２
の時間経過後に前記他方が属する衛星通信地球局の送信
出力をオンして前記主局と前記第２の衛星通信地球局と
の間でテレビジョン番組の切替を行う番組切替方式に於
いて、前記主局に分配増幅器と第３の番組伝送制御装置
とを備え、前記第１の中継回線装置の受信出力に前記分
配増幅器の入力端を接続し、前記分配増幅器の２出力の
うち一方に前記第３の番組伝送制御装置を接続し、この
第３の番組伝送制御装置が前記番組制御用信号を受信し
た後前記第２の時間経過後に出力する送信オン制御信号
を前記第１の衛星通信地球局の前記第１の送信装置の送
信出力がオンとなる時間として使用することを特徴とす
る番組切替方式。A master station includes a first trunk line device, a main controller using a computer, and a first communication modem, and a first satellite communication earth installed at a remote location of the master station. The station includes a second trunk line device, a first program transmission control device, a first transmitting device, a first receiving device, a first duplexer,
A first antenna, a second communication modem, and a slave control device using a computer; and a television signal from the master station is transmitted to the first and second relay line devices and the first and second relay line devices. A communication modem is used to transmit to the first satellite communication earth station, transmit from the first satellite communication earth station to a satellite, and return a signal from the satellite to a second program transmission control device. The first satellite communication earth station receives the television signal transmitted from the second satellite communication earth station and transmitted from the second satellite communication earth station to the satellite. A program is transmitted to the master station using a second trunk line device and the first and second communication modems, and one of the first and second program transmission control devices is superimposed on a television signal to transmit a program. After sending the control signal, Accordingly, after a predetermined first time has elapsed, the transmission output of the satellite communication earth station to which the one belongs belongs is turned off, and after the other receives the program control signal via the satellite, The second decided
In the program switching system for turning on the transmission output of the satellite communication earth station to which the other belongs to and switching the television program between the master station and the second satellite communication earth station after a lapse of time, The main station includes a distribution amplifier and a third program transmission control device. An input terminal of the distribution amplifier is connected to a reception output of the first trunk line device, and one of the two outputs of the distribution amplifier is connected to the first output. And a transmission-on control signal that is output after the second time has passed after the third program transmission control device has received the program control signal. The program switching method is used as a time when the transmission output of the first transmission device is turned on.
４の番組伝送制御装置、第２の送信装置、第２の受信装
置、第２の分波器、及び第２のアンテナを含み、前記主
局からのテレビジョン信号を前記テレビジョン信号切替
器で前記主局向けと前記第１の衛星通信地球局向けとに
切替えて前記主局又は前記第１の衛星通信地球局のいず
れか一方にて送受信するサイトダイバーシティシステム
を構成したことを特徴とする請求項１記載の番組切替方
式。2. The master station includes a television signal switch, a fourth program transmission control device, a second transmitting device, a second receiving device, a second duplexer, and a second antenna, The television signal from the master station is switched by the television signal switch between the master station and the first satellite communication earth station, and either the master station or the first satellite communication earth station is switched. 2. The program switching system according to claim 1, wherein a site diversity system for transmitting and receiving is configured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3124228A JP3025918B2 (en) | 1991-05-29 | 1991-05-29 | Program switching method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3124228A JP3025918B2 (en) | 1991-05-29 | 1991-05-29 | Program switching method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04351027A JPH04351027A (en) | 1992-12-04 |
| JP3025918B2 true JP3025918B2 (en) | 2000-03-27 |
Family
ID=14880161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3124228A Expired - Lifetime JP3025918B2 (en) | 1991-05-29 | 1991-05-29 | Program switching method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3025918B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7143070B2 (en) * | 2017-11-14 | 2022-09-28 | 株式会社東芝 | Display control device and display control method |
| JP7034674B2 (en) * | 2017-11-14 | 2022-03-14 | 株式会社東芝 | Display control device and display control method |
-
1991
- 1991-05-29 JP JP3124228A patent/JP3025918B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04351027A (en) | 1992-12-04 |
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| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19991207 |