JPH0865271A - Identification signal transmitter - Google Patents

Abstract

PURPOSE: To provide the identification signal transmitter with which the number of dedicated transmission lines can be decreased for one line by transmitting an identification signal while multiplexing its frequency with a sub-audio signal. CONSTITUTION: The frequencies of a sub-voice and the identification signal are multiplexed on the side of a playing place. At such a time, while using a carrier wave fH generated from the horizontal synchronizing signal of a video signal, those frequencies are mutually multiplexed by performing AM modulation with an authogonal exchange system while using balanced modulators 1 and 6. On the side of a transmitting place, synchronism is detected while using a frequency signal similarly generated from the horizontal synchronizing signal of the video signal so that the multiplexed sub-audio signal and identification signal can be demodulated and demultiplexed. Thus, two signals can be transmitted by one dedicated line. Then, one dedicated transmission line between the playing place and the transmitting place is enough besides two lines for the video signal and the main audio signal, totally, three lines are provided, and the number can be decreased for one line. Further, any deviation in the switching timing of an audio program can be prevented from being generated as well.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は識別信号伝送装置に関
し、特にテレビジョン音声多重信号の番組内容を示す識
別信号を、演奏所と送信所との間で伝送するため識別信
号伝送装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an identification signal transmission device, and more particularly to an identification signal transmission device for transmitting an identification signal indicating a program content of a television sound multiplex signal between a play place and a transmission place.

【０００２】[0002]

【従来の技術】従来のこの種の装置の概略構成を図３に
システムブロック図として示す。演奏所側において、映
像，主音声，副音声の各々を送出するための伝送装置２
６と、音声多重信号の番組内容（ステレオ，モノラル，
二重音声）を示す識別信号を送出するための伝送装置２
８とが設けられている。2. Description of the Related Art A schematic block diagram of a conventional device of this type is shown in FIG. 3 as a system block diagram. Transmission device 2 for transmitting each of video, main audio, and sub audio on the performance side
6 and program content of audio multiplex signal (stereo, monaural,
Transmission device 2 for transmitting an identification signal indicating dual voice)
And 8 are provided.

【０００３】これ等各信号は個別の伝送ラインＬ１〜Ｌ
４を夫々介して送信所側へ送出されており、送信所側で
は、映像，主音声，副音声の各々を受信する伝送装置２
７と、識別信号を受信する伝送装置２９とが設けられて
いる。また、音声多重変調器３０が設けられており、主
音声，副音声，更には識別信号が多重化されて音声多重
コンポジット信号として映像信号と共に送信機（図示せ
ず）へ送出されるようになっている。Each of these signals has its own individual transmission lines L1 to L.
4 is transmitted to the transmitting station side, and the transmitting station side receives the video, the main audio, and the sub audio respectively.
7 and a transmission device 29 for receiving the identification signal. Further, an audio multiplex modulator 30 is provided so that the main audio, the sub audio, and further the identification signal are multiplexed and transmitted as an audio multiplex composite signal together with a video signal to a transmitter (not shown). ing.

【０００４】[0004]

【発明が解決しようとする課題】この種の従来の伝送シ
ステムでは、映像，主音声，副音声を夫々伝送するプロ
グラム回線Ｌ１〜Ｌ３の他に識別信号伝送用の回線Ｌ４
が必要であると共に、それ専用の送受用の伝送装置（Ｔ
Ｘ，ＲＸ）２８，２９が必要になるという問題がある。In the conventional transmission system of this type, in addition to the program lines L1 to L3 for transmitting video, main audio and sub-audio, respectively, a line L4 for transmitting an identification signal is provided.
Is required and the transmission / reception device (T
There is a problem that X, RX) 28 and 29 are required.

【０００５】また、独立回線Ｌ４で識別信号のみを伝送
する方式であるために、モノラル／ステレオ／二重音声
の各番組のモード切替え時に時間差を生じることがあ
り、切替えタイミングの調整をなす必要があり、煩雑で
あるとう欠点がある。Further, since only the identification signal is transmitted through the independent line L4, there may be a time difference at the time of mode switching of each program of monaural / stereo / duplex audio, and it is necessary to adjust the switching timing. There is a drawback that it is complicated.

【０００６】本発明の目的は、識別信号を副音声信号と
周波数多重化して伝送することにより、専用伝送回線を
一本減らすことができる識別信号伝送装置を提供するこ
とである。An object of the present invention is to provide an identification signal transmission device capable of reducing the number of dedicated transmission lines by frequency-multiplexing an identification signal with a sub-audio signal and transmitting the same.

【０００７】本発明の他の目的は、音声番組モード切替
え時のタイミングずれのない識別信号伝送装置を提供す
ることである。Another object of the present invention is to provide an identification signal transmission device which does not have a timing shift when switching the audio program mode.

【０００８】[0008]

【課題を解決するための手段】本発明によれば、テレビ
ジョン音声多重信号の番組内容を示す識別信号を、演奏
所と送信所との間で伝送する識別信号伝送装置であつ
て、前記演奏所側において、前記識別信号を発生する手
段と、テレビジョン信号の水平同期信号に位相同期した
搬送波信号及びそれに直交する直交搬送波信号を生成す
る手段と、前記搬送波信号及び直交搬送波信号の一方を
音声多重信号の副音声信号により振幅変調する手段と、
前記搬送波信号及び直交搬送波信号の他方を前記識別信
号により振幅変調する手段と、これ等２つの振幅変調出
力を加算合成して送出する手段と、を有することを特徴
とする識別信号伝送装置が得られる。According to the present invention, there is provided an identification signal transmission device for transmitting an identification signal indicating a program content of a television sound multiplex signal between a performance place and a transmission place, wherein the performance is performed. At the local side, a means for generating the identification signal, a means for generating a carrier signal phase-synchronized with the horizontal synchronizing signal of the television signal and a quadrature carrier signal orthogonal thereto, and one of the carrier signal and the quadrature carrier signal are voiced. Means for amplitude modulation by the sub-audio signal of the multiplex signal,
An identification signal transmission device comprising: means for amplitude-modulating the other of the carrier signal and the quadrature carrier signal by the identification signal; and means for adding and synthesizing these two amplitude-modulated outputs and sending out. To be

【０００９】更に本発明によれば、送信所側において、
前記演奏所からの送出テレビジョン信号の水平同期信号
に位相同期した周波数信号を及びそれに直交する直交周
波数信号を生成する手段と、前記演奏所からの送出振幅
変調出力を前記周波数信号及び直交周波数信号により夫
々検波する検波手段と、を有し、前記検波手段の検波出
力から前記識別信号及び副音声信号を夫々導出すること
を特徴とする識別信号伝送装置が得られる。Further, according to the present invention, at the transmitting station side,
Means for generating a frequency signal phase-synchronized with a horizontal synchronizing signal of a television signal transmitted from the playing place and a quadrature frequency signal orthogonal thereto, and a transmission amplitude modulation output from the playing place is the frequency signal and the quadrature frequency signal. According to the present invention, there is provided a detection means for respectively detecting, and the identification signal transmission device is obtained, wherein the identification signal and the sub audio signal are respectively derived from the detection output of the detection means.

【００１０】[0010]

【作用】副音声と識別信号とを周波数多重化する。この
とき、映像信号の水平同期信号から生成した搬送波を用
いて互いに直交変調方式にてＡＭ変調することで多重化
する。送信所側では、同じく映像信号の水平同期信号か
ら生成した周波数信号を用いて同期検波することで、多
重化された副音声信号と識別信号とを復調分離する。The sub-voice and the identification signal are frequency-multiplexed. At this time, the carrier waves generated from the horizontal synchronizing signal of the video signal are used to perform the AM modulation by the quadrature modulation method to perform the multiplexing. At the transmitting station side, the multiplexed sub audio signal and the identification signal are demodulated and separated by performing synchronous detection using the frequency signal generated from the horizontal synchronizing signal of the video signal.

【００１１】これにより、一本の専用回線で２つの信号
が伝送可能となると共に、副音声と識別信号とを多重化
して伝送するので、両者の時間差がなくなり、番組モー
ドの切替えタイミングのずれもなくなる。As a result, two signals can be transmitted by one dedicated line, and since the sub-voice and the identification signal are multiplexed and transmitted, there is no time difference between them, and there is a shift in the program mode switching timing. Disappear.

【００１２】[0012]

【実施例】以下、図面を用いて本発明の実施例について
説明する。Embodiments of the present invention will be described below with reference to the drawings.

【００１３】図１及び図２は本発明の一実施例のブロッ
ク図である。先ず図１を参照すると、演奏所側の構成を
示すブロック図であり、映像信号から水平同期分離部２
にて水平同期信号が分離され、ＰＬＬ（フェイズロック
ドループ）回路３によりこの水平同期信号に位相同期し
た搬送波（周波数は水平同期信号のそれｆH と同一とす
る）及び１／２の周波数（ｆH ／２）を有する周波数信
号が生成される。1 and 2 are block diagrams of an embodiment of the present invention. First of all, referring to FIG. 1, there is shown a block diagram showing a configuration on the side of a playing room, in which a horizontal sync separation unit 2 from a video signal is provided.
The horizontal synchronizing signal is separated at, and the carrier (frequency is the same as that of the horizontal synchronizing signal fH) phase-synchronized with this horizontal synchronizing signal by the PLL (phase locked loop) circuit 3 and 1/2 frequency (fH / A frequency signal having 2) is generated.

【００１４】ｆH の搬送波は平衡変調器１へ入力されて
副音声のＡＭ変調のための搬送波信号となる。また、こ
のｆH の搬送波は位相遅延器４にて９０°位相遅延され
て直交搬送波となり、平衡変調器６へ入力されて識別信
号のＡＭ変調のための搬送波信号となる。The carrier of fH is input to the balanced modulator 1 and becomes a carrier signal for AM modulation of sub-voice. Further, the carrier of fH is phase-delayed by 90 ° in the phase delay unit 4 to become a quadrature carrier, which is input to the balanced modulator 6 and becomes a carrier signal for AM modulation of the identification signal.

【００１５】識別信号はモノラル，ステレオ，２ケ国語
の各モードに対応したモノトーン発振器１５，１６，１
７から発生されて平衡変調器６へ入力される。The identification signal is a monotone oscillator 15, 16, 1 corresponding to each of monophonic, stereo and bilingual modes.
7 is generated and input to the balanced modulator 6.

【００１６】これ等平衡変調器１，６の各直交変調出力
は加算器７で加算合成されて周波数変換器８でＰＬＬ回
路３からのｆH ／２の周波数信号をローカル信号として
用いて周波数変換を行い、可聴帯域へ落される。可聴帯
域とするのは、伝送回線としてＮＴＴ第２種伝送サービ
ス（１０ＫＨZ 帯域）または第３種伝送サービス（１５
ＫＨZ 帯域）を用いるためである。そして、ＬＰＦ９に
より下側帯波のみを抽出して伝送装置１０へ映像信号と
主音声信号と共に、送出される。The quadrature modulation outputs of the balanced modulators 1 and 6 are added and synthesized by the adder 7 and frequency-converted by the frequency converter 8 using the frequency signal fH / 2 from the PLL circuit 3 as a local signal. Performed and dropped to the audible band. The audible band is the NTT type 2 transmission service (10 kHz band) or the type 3 transmission service (15
This is because the KHZ band) is used. Then, only the lower sideband is extracted by the LPF 9 and transmitted to the transmission device 10 together with the video signal and the main audio signal.

【００１７】図２は送信所側の本発明の実施例のブロッ
ク図であり、受信用伝送装置２０にて受信された映像信
号，主音声，副音声と識別信号との多重信号のうち、多
重信号は周波数変換部２１へ入力されて再びｆH の周波
数に変換される。そのために、水平同期分離部２２及び
ＰＬＬ回路２３が設けられており、受信映像信号から水
平同期分離部２２にて水平同期信号が分離され、ＰＬＬ
回路２３によりこの水平同期信号に位相同期したｆH 及
びｆH ／２の周波数信号が生成される。FIG. 2 is a block diagram of an embodiment of the present invention on the transmitting station side. Of the multiplex signals of the video signal, the main audio, the sub audio and the identification signal received by the receiving transmission device 20, multiplex signals are multiplexed. The signal is input to the frequency converter 21 and converted again to the frequency of fH. Therefore, the horizontal synchronization separation unit 22 and the PLL circuit 23 are provided, and the horizontal synchronization signal is separated from the received video signal by the horizontal synchronization separation unit 22, and the PLL
The circuit 23 generates frequency signals fH and fH / 2 which are phase-locked with the horizontal synchronizing signal.

【００１８】このｆH ／２の周波数信号と先の多重信号
とが周波数変換部で周波数混合されてｆH の周波数に変
換されるのである。この周波数変換後の信号のうち上側
帯波のみがＨＰＦ２４により抽出され２分配器２５にて
２分配される。The frequency signal of fH / 2 and the above multiplex signal are frequency-mixed by the frequency converter to be converted into the frequency of fH. Of the signal after the frequency conversion, only the upper sideband is extracted by the HPF 24 and divided by the 2 divider 25.

【００１９】これ等各分配出力は同期検波器２６，２７
へ入力され、ＰＬＬ回路２３からのｆH の周波数信号に
より同期検波される。このとき、一方の同期検波器２７
では、位相遅延器２８にて９０°位相遅延されたｆH の
周波数信号が同期検波用に用いられており、直交同期検
波がなされるのである。The respective distributed outputs are synchronized detectors 26 and 27.
Is input to the PLL circuit 23 and is synchronously detected by the fH frequency signal from the PLL circuit 23. At this time, one of the synchronous detectors 27
In this case, the frequency signal of fH, which is phase-delayed by 90 ° in the phase delay device 28, is used for synchronous detection, and quadrature synchronous detection is performed.

【００２０】同期検波器２６の出力は副音声となり、同
期検波器２７の出力は識別信号となり、この識別信号は
ＢＰＦ２９〜３１により夫々トーン識別され、増幅判定
器３２〜３４にて各番組プログラムの識別信号毎に接点
のオンオフを行うことになる。The output of the synchronous detector 26 becomes a sub-sound, and the output of the synchronous detector 27 becomes an identification signal. The identification signals are tone-identified by the BPFs 29-31, respectively, and the amplification decision-making units 32-34 make each of the program programs. The contact is turned on and off for each identification signal.

【００２１】尚、ＮＴＴ第３種伝送サービス（１５ＫＨ
Z 帯域）を多重信号伝送に用いる場合には、図１におい
ては、直交変調波（ｆH ）の合成波（加算器７の出力）
を、低いｆH ／２の周波数へ落すための周波数変換は必
要ではなく、加算器２７の出力を直接ＬＰＦ９へ入力し
て下側帯波のみをそのまま送出するようにしても良いこ
とになる。この場合、図２の送信所側でも、周波数変換
器２１は必要なくなり、そのまま２分配器２５へ入力す
れば良いものである。Incidentally, the NTT type 3 transmission service (15 KH
When the Z band) is used for multiplex signal transmission, in FIG. 1, a composite wave of the orthogonal modulation wave (fH) (output of the adder 7)
Need not be converted to a low frequency fH / 2, but the output of the adder 27 may be directly input to the LPF 9 and only the lower sideband may be sent out. In this case, the frequency converter 21 is not necessary even at the transmitting station side of FIG.

【００２２】また、平衡変調器１において、ｆH の搬送
波を完全に抑圧せずに搬送波残留方式の変調方式とすれ
ば、送信所側での同期検波時に、この残留搬送波を抽出
して同期検波用のｆH 周波数信号を生成できるので、図
２の水平同期分離部２２及びＰＬＬ回路２３が不要とな
る。Further, in the balanced modulator 1, if the carrier of fH is not completely suppressed and a carrier residual method is used, the residual carrier is extracted for synchronous detection at the time of synchronous detection at the transmitting station side. Since the fH frequency signal can be generated, the horizontal sync separation unit 22 and the PLL circuit 23 of FIG. 2 are unnecessary.

【００２３】[0023]

【発明の効果】以上述べた如く、本発明によれば、音声
プログラム識別信号を副音声信号と多重化したので、演
奏所間と送信所間との専用伝送回線が映像信号，主音声
信号の２本の他に１本で良く合計３本のみで良く、また
音声プログラムの切替えタイミングのずれも生じないと
いう効果がある。As described above, according to the present invention, the audio program identification signal is multiplexed with the sub audio signal, so that the dedicated transmission line between the performance stations and the transmission station is the video signal and the main audio signal. In addition to two, only one is required and only three in total, and there is an effect that the timing of switching the voice program does not shift.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明の実施例の演奏所側ブロック図である。FIG. 1 is a block diagram of a playing room side of an embodiment of the present invention.

【図２】本発明の実施例の送信所側ブロック図である。FIG. 2 is a block diagram of a transmitting station according to the embodiment of the present invention.

【図３】従来の識別信号伝送方式を説明するためのブロ
ック図である。FIG. 3 is a block diagram for explaining a conventional identification signal transmission system.

【符号の説明】[Explanation of symbols]

１，６ 平衡変調器 ２，２２ 水平同期分離部 ３，２３ ＰＬＬ回路 ４，２８ 位相遅延器 ７ 加算器 ８，２１ 周波数変換器 ９ ＬＰＦ １０ 送信側伝送装置 ２０ 受信側伝送装置 ２４ ＨＰＦ ２５ ２分配器 ２６，２７ 同期検波器 ２９〜３１ ＢＰＦ ３２〜３４ 増幅判定器 1,6 Balanced modulator 2,22 Horizontal sync separation part 3,23 PLL circuit 4,28 Phase delayer 7 Adder 8,21 Frequency converter 9 LPF 10 Transmission side transmission device 20 Reception side transmission device 24 HPF 252 Distribution Device 26, 27 Synchronous detector 29-31 BPF 32-34 Amplification judgment device

Claims (3)

【特許請求の範囲】[Claims] 【請求項１】 テレビジョン音声多重信号の番組内容を
示す識別信号を、演奏所と送信所との間で伝送する識別
信号伝送装置であつて、 前記演奏所側において、 前記識別信号を発生する手段と、 テレビジョン信号の水平同期信号に位相同期した搬送波
信号及びそれに直交する直交搬送波信号を生成する手段
と、 前記搬送波信号及び直交搬送波信号の一方を音声多重信
号の副音声信号により振幅変調する手段と、 前記搬送波信号及び直交搬送波信号の他方を前記識別信
号により振幅変調する手段と、 これ等２つの振幅変調出力を加算合成して送出する手段
と、 を有することを特徴とする識別信号伝送装置。1. An identification signal transmission device for transmitting an identification signal indicating a program content of a television sound multiplex signal between a play station and a transmission station, wherein the identification signal is generated at the play station side. Means, means for generating a carrier signal phase-synchronized with the horizontal synchronizing signal of the television signal and a quadrature carrier signal orthogonal thereto, and one of the carrier signal and the quadrature carrier signal is amplitude-modulated by the sub-voice signal of the voice multiplex signal. And a means for amplitude-modulating the other of the carrier signal and the quadrature carrier signal by the identification signal, and means for adding and synthesizing these two amplitude-modulated outputs to send out the identification signal transmission. apparatus. 【請求項２】 送信所側において、 前記演奏所からの送出テレビジョン信号の水平同期信号
に位相同期した周波数信号を及びそれに直交する直交周
波数信号を生成する手段と、 前記演奏所からの送出振幅変調出力を前記周波数信号及
び直交周波数信号により夫々検波する検波手段と、 を有し、前記検波手段の検波出力から前記識別信号及び
副音声信号を夫々導出することを特徴とする請求項１記
載の識別信号伝送装置。2. A means for generating, on the transmitting station side, a frequency signal phase-synchronized with a horizontal synchronizing signal of a television signal sent from the playing station and an orthogonal frequency signal orthogonal thereto, and an amplitude sent from the playing station. The detection means for detecting the modulated output by the frequency signal and the quadrature frequency signal, respectively, and the identification signal and the sub-voice signal are respectively derived from the detection output of the detection means. Identification signal transmission device. 【請求項３】 前記演奏所側において前記加算手段の加
算出力を可聴周波数帯域へ周波数変換する手段を有し、
前記送信所側において前記検波手段の前段で前記演奏所
からの送出振幅変調出力を前記周波数信号の周波数に変
換する手段を有することを特徴とする請求項２記載の識
別信号伝送装置。3. A means for converting the addition output of the addition means into an audible frequency band on the side of the playing room,
3. The identification signal transmission device according to claim 2, further comprising means for converting the amplitude-modulated output of the transmission from the performance station into a frequency of the frequency signal before the detection means on the transmission station side.