JPS6231549B2 - - Google Patents
Info
- Publication number
- JPS6231549B2 JPS6231549B2 JP56195999A JP19599981A JPS6231549B2 JP S6231549 B2 JPS6231549 B2 JP S6231549B2 JP 56195999 A JP56195999 A JP 56195999A JP 19599981 A JP19599981 A JP 19599981A JP S6231549 B2 JPS6231549 B2 JP S6231549B2
- Authority
- JP
- Japan
- Prior art keywords
- reception mode
- signal
- stereo
- input
- switching
- 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
Links
- 238000001514 detection method Methods 0.000 claims description 4
- 230000009977 dual effect Effects 0.000 description 5
- 239000002131 composite material Substances 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H40/00—Arrangements specially adapted for receiving broadcast information
- H04H40/18—Arrangements characterised by circuits or components specially adapted for receiving
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/60—Receiver circuitry for the reception of television signals according to analogue transmission standards for the sound signals
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Television Receiver Circuits (AREA)
Description
【発明の詳細な説明】
本発明は音声多重放送受信機に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an audio multiplex broadcast receiver.
第１図は従来のテレビジヨン音声多重放送受信
機を示し、同図において、１はアンテナ、２はテ
レビジヨンフロントエンド、３はIF部、４はFM
検波部で、アンテナ１で受信した電波をフロンド
エンド２及びIF部３を介して入力し、この電波
をFM変調した複合信号Ｓを出力する。５は主音
声フイルター部で、複合信号Ｓを入力して和信号
（Ｌ＋Ｒ）を出力する。６は副音声検波部で、複
合信号Ｓを入力し、これをFM変調して差信号
（Ｌ−Ｒ）を出力する。７は制御信号検波部で、
複合信号Ｓを入力し、アンテナ１の受信電波がス
テレ放送の電波が或いは二重放送の電波かを検出
し、ステレオ放送であればステレオ表示器８にス
テレオ受信信号Ｂを出力して、ステレオ表示器８
を駆動し、また二重放送であれば二重放送受信信
号Ｃを出力して、二重放送表示器９を駆動する。
１０はマトリクス回路で、和信号（Ｌ＋Ｒ）及び
差信号（Ｌ−Ｒ）を入力し二重放送の受信時に入
力端子Ｄに切替信号Ａを入力する時出力端子Ｌ，
Ｒから主チヤンネル信号を出力し、入力端子Ｅに
切替信号Ａを入力するとき副チヤンネル信号を出
力し、入力端子Ｆに切替信号Ａを入力するとき
主・副チヤンネル使号を出力して受信機の受信モ
ードを主チヤンネル受信モード、副チヤンネル受
信モード及び主・副チヤンネル受信モードに夫々
切替える。またステレオ放送の受信時に入力端子
Ｇに切替信号Ａを入力しないとき出力端子Ｌ，Ｒ
からステレオ信号を出力できると共に、切替信号
Ａを入力するとき強制モノラル信号を出力し、受
信モードをステレオ受信モードと強制モノラル受
信モードに切替えるように構成され、受信電波が
弱いためにステレオ受信モードでは聞き取りにく
いときでも、モノラル受信モードによつて明瞭に
聞くことが可能な場合があるので、ステレオ放送
をモノラルモードで聞けるようにしている。とこ
ろが従来は二重放送の受信モードの切替スイツチ
として、マトリクス回路１０の入力端子Ｄ，Ｅ，
Ｆに対応した主チヤンネル、副チヤンネル及び
主・副チヤンネル用の切替スイツチ１１，１２，
１３を夫々別個に設け、またステレオ放送受信時
に強制モノラル受信モードに切替える切替スイツ
チ１４を入力端子Ｇに対応して設けており、従つ
て非常に不経済であつた。 Figure 1 shows a conventional television audio multiplex broadcast receiver, in which 1 is an antenna, 2 is a television front end, 3 is an IF section, and 4 is an FM section.
The detection section inputs the radio waves received by the antenna 1 via the front end 2 and the IF section 3, and outputs a composite signal S obtained by FM modulating the radio waves. 5 is a main audio filter unit which inputs the composite signal S and outputs a sum signal (L+R). Reference numeral 6 denotes a sub-audio detection section which inputs the composite signal S, performs FM modulation on this, and outputs a difference signal (LR). 7 is a control signal detection section;
Inputs composite signal S, detects whether the radio waves received by antenna 1 are stereo broadcast radio waves or dual broadcast radio waves, and if stereo broadcast, outputs stereo reception signal B to stereo display 8 to display stereo. Vessel 8
If it is a double broadcast, a double broadcast reception signal C is outputted to drive the double broadcast display 9.
10 is a matrix circuit which inputs a sum signal (L+R) and a difference signal (L-R), and when receiving a double broadcast, outputs terminals L, when switching signal A is input to input terminal D;
The main channel signal is output from R, and when the switching signal A is input to the input terminal E, the sub channel signal is output, and when the switching signal A is input to the input terminal F, the main and sub channel signals are output, and the receiver is The receiving mode is switched to the main channel receiving mode, the sub-channel receiving mode, and the main/sub-channel receiving mode, respectively. Also, when receiving stereo broadcasting, if switching signal A is not input to input terminal G, output terminals L and R
It is configured so that it can output a stereo signal, and also output a forced monaural signal when switching signal A is input, and switch the reception mode between stereo reception mode and forced monaural reception mode. Even when it is difficult to hear, it may be possible to hear clearly in monaural reception mode, so stereo broadcasts can be listened to in monaural mode. However, conventionally, the input terminals D, E, and
F-compatible main channel, sub-channel, and main/sub-channel changeover switches 11, 12,
13 are provided separately, and a changeover switch 14 for switching to the forced monaural reception mode when receiving stereo broadcasting is provided corresponding to the input terminal G, which is very uneconomical.
本発明は上記問題点に鑑み、１個の切替スイツ
チで二重放送受信モードを切替えることができ、
しかもステレオ受信モードとモノラル受信モード
とを切替えることができるようにしたものであ
る。 In view of the above problems, the present invention can switch the dual broadcast reception mode with one switch,
Moreover, it is possible to switch between stereo reception mode and monaural reception mode.
以下、本発明を図示の実施例に従つて説明する
と、第２図において、Ｓ１は切替スイツチで、オ
ン操作毎に切替信号Ａを出力する。１５は切替回
路で、ステレオ受信信号Ｂの入力時に切替スイツ
チＳ１からの切替信号Ａをフリツプフロツプ１６
へ送出すると共に、ステレオ受信信号Ｂの停止時
に前記切替信号Ａをシフトレジスタ１７に送出す
る。シフトレジスタ１７は切替信号Ａをクロツク
パルスとして入力し、その各段の出力端子Ｈ，
Ｉ，Ｊがマトリクス回路１０の入力端子Ｄ，Ｅ，
Ｆに夫々対応しており、切替信号Ａの入力毎に出
力端子Ｈ，Ｉ，Ｊから順次切替信号A′を出力す
る。フリツプフロツプ１６は切替信号Ａの入力毎
にセツトとリセツトを繰返し、セツト時にマトリ
クス回路１０の入力端子Ｇに切替信号A′を出力
すると共に、リセツト時に切替信号A′を停止す
る。 Hereinafter, the present invention will be explained according to the illustrated embodiment. In FIG. 2, S1 is a changeover switch, which outputs a changeover signal A every time it is turned on. Reference numeral 15 designates a switching circuit which transfers the switching signal A from the switching switch S1 when the stereo reception signal B is input to the flip-flop 16.
At the same time, when the stereo reception signal B stops, the switching signal A is also sent to the shift register 17. The shift register 17 inputs the switching signal A as a clock pulse, and outputs the output terminals H,
I, J are input terminals D, E, and
Each time the switching signal A is input, the switching signal A' is sequentially outputted from the output terminals H, I, and J. The flip-flop 16 repeats setting and resetting every time the switching signal A is input, outputs the switching signal A' to the input terminal G of the matrix circuit 10 at the time of setting, and stops the switching signal A' at the time of reset.
上記実施例の構成によれば、アンテナ１がステ
レオ放送を受信した時、切替回路１５にステレオ
受信信号Ｂが入力し、切替回路１５は切替スイツ
チＳ１からの切替信号Ａをフリツプフロツプ１６
側に送出可能になる。この状態で切替スイツチＳ
１をオン操作すると、そのオン操作毎にフリツプ
フロツプ１６はセツト、リセツトを繰返すので、
マトリクス回路１０の出力端子Ｌ，Ｒかステレオ
信号と強制モノラル信号とを順次出力し、受信機
はステレオ受信モードとモノラル受信モードとを
繰返す。又、アンテナ１がステレオ放送以外の例
えば二重放送あるいはモノラル放送を受信したと
き、切替回路１５は切替信号Ａをシフトレジスタ
１７側に送出可能となり、切替スイツチＳ１のオ
ン繰作毎にシフトレジスタ１７は切替信号Ａを入
力し、シフト動作して出力端子Ｈ，Ｉ，Ｊから順
次切替信号A′を出力するので、マトリクス回路
１０の出力端子Ｌ，Ｒから主チヤンネル信号、副
チヤンネル及び主・副チヤンネル信号が順次出力
し、受信モードを主チヤンネル受信モード、副チ
ヤンネル受信モード、主・副チヤンネル受信モー
ドと順次切替える。従つて二重放送受信モードの
切替えと強制モノラル受信モードの切替えを１個
の切替スイツチＳ１により行うことができる。 According to the configuration of the above embodiment, when the antenna 1 receives a stereo broadcast, the stereo reception signal B is input to the switching circuit 15, and the switching circuit 15 transfers the switching signal A from the switching switch S1 to the flip-flop 16.
It becomes possible to send it to the side. In this state, switch S
1, the flip-flop 16 repeats setting and resetting each time it is turned on.
The output terminals L and R of the matrix circuit 10 sequentially output a stereo signal and a forced monaural signal, and the receiver repeats the stereo reception mode and the monaural reception mode. Further, when the antenna 1 receives a double broadcast or a monaural broadcast other than a stereo broadcast, the switching circuit 15 becomes capable of sending the switching signal A to the shift register 17 side, and the shift register 17 is switched on each time the switching switch S1 is turned on. inputs the switching signal A, performs a shift operation, and sequentially outputs the switching signal A' from the output terminals H, I, and J. Therefore, the output terminals L and R of the matrix circuit 10 output the main channel signal, the subchannel, and the main/sub channels. Channel signals are sequentially output, and the reception mode is sequentially switched to main channel reception mode, subchannel reception mode, and main/subchannel reception mode. Therefore, switching between the dual broadcast reception mode and the forced monaural reception mode can be performed using one changeover switch S1.
なお、コンピユータのソフトウエアを使つて前
記切替回路１５、フリツプフロツプ１６及びシフ
トレジスタ１７と同様の動作を実現するようにし
てもよい。 Note that operations similar to those of the switching circuit 15, flip-flop 16, and shift register 17 may be realized using computer software.
本発明によれば、１個の切替スイツチで二重放
送受信モードを主チヤンネル受信モード、副チヤ
ンネル受信モード及び主・副チヤンネル受信モー
ドに順次切替えることができ、しかもステレオ受
信モードとモノラル受信モードとを切替えること
ができるので、切替スイツチが１個で済み、経済
的に非常に有利であると共に、構成が簡単になつ
て製造容易でかつ受信モードの切替えも楽にな
る。 According to the present invention, the dual broadcast reception mode can be sequentially switched to the main channel reception mode, the subchannel reception mode, and the main/subchannel reception mode with a single changeover switch, and moreover, the dual broadcast reception mode can be switched sequentially to the main channel reception mode, the subchannel reception mode, and the main/subchannel reception mode. Since only one changeover switch is required, it is very economically advantageous, and the structure is simple, making it easy to manufacture and switching the reception mode.
第１図は従来例を示すブロツク図、第２図は本
発明の一実施例を示すブロツク図であるＳ１は切
替スイツチ、１５は切替回路、１６はフリツプフ
ロツプ、１７はシフトレジスタである。
FIG. 1 is a block diagram showing a conventional example, and FIG. 2 is a block diagram showing an embodiment of the present invention. S1 is a changeover switch, 15 is a changeover circuit, 16 is a flip-flop, and 17 is a shift register.
Claims (1)
イツチと、切替信号の入力毎に受信モードを主チ
ヤンネル受信モード、副チヤンネル受信モード及
び主・副チヤンネル受信モードに順次切替えるシ
フトレジスタと、切替信号の入力毎に受信モード
をステレオ放送受信モードと強制モノラル受信モ
ードに順次切替えるフリツプフロツプと、受信電
波の状態を検出する制御信号検出部と、前記切替
スイツチの切替信号をステレオ放送の受信時にフ
リツプフロツプに送出し、その他の放送受信時に
シフトレジスタに送出する切替回路とを備えるこ
とを特徴とする音声多重放送受信機。1 A changeover switch that outputs a changeover signal each time the switch is operated, a shift register that sequentially changes the reception mode to main channel reception mode, subchannel reception mode, and main/subchannel reception mode each time the changeover signal is input, and an input of the changeover signal. a flip-flop that sequentially switches the reception mode between a stereo broadcast reception mode and a forced monaural reception mode each time a stereo broadcast reception mode is received; a control signal detection section that detects the state of the received radio waves; An audio multiplex broadcast receiver characterized by comprising a switching circuit for transmitting signals to a shift register when receiving other broadcasts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56195999A JPS5897980A (en) | 1981-12-05 | 1981-12-05 | Receiver for sound multiplex broadcast |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56195999A JPS5897980A (en) | 1981-12-05 | 1981-12-05 | Receiver for sound multiplex broadcast |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5897980A JPS5897980A (en) | 1983-06-10 |
| JPS6231549B2 true JPS6231549B2 (en) | 1987-07-09 |
Family
ID=16350531
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56195999A Granted JPS5897980A (en) | 1981-12-05 | 1981-12-05 | Receiver for sound multiplex broadcast |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5897980A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56168478A (en) * | 1980-05-28 | 1981-12-24 | Mitsubishi Electric Corp | Switching device of multiplex broadcasting |
-
1981
- 1981-12-05 JP JP56195999A patent/JPS5897980A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56168478A (en) * | 1980-05-28 | 1981-12-24 | Mitsubishi Electric Corp | Switching device of multiplex broadcasting |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5897980A (en) | 1983-06-10 |
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