JPH06217231A - Switching device for satellite broadcat receiver - Google Patents
Switching device for satellite broadcat receiverInfo
- Publication number
- JPH06217231A JPH06217231A JP720693A JP720693A JPH06217231A JP H06217231 A JPH06217231 A JP H06217231A JP 720693 A JP720693 A JP 720693A JP 720693 A JP720693 A JP 720693A JP H06217231 A JPH06217231 A JP H06217231A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- audio
- broadcast
- switching
- satellite
- 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.)
- Pending
Links
Landscapes
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、衛星（ＢＳ、ＣＳ等）
によるＰＣＭ音声放送およびテレビ放送の双方を受信可
能とする衛星放送受信機の音声および映像の自動切換に
関する。The present invention relates to satellites (BS, CS, etc.)
The present invention relates to automatic switching of audio and video of a satellite broadcast receiver capable of receiving both PCM audio broadcast and television broadcast.
【０００２】[0002]
【従来の技術】近年、ＢＳ（放送衛星）やＣＳ（通信衛
星）等が次々と打ち上げられ、多種多様の番組が放送さ
れる状況となってきている。これら衛星放送を大別する
と映像と音声とからなるテレビ放送と、音楽番組を中心
としたＰＣＭ方式による音声のみの放送（ＰＣＭ音声放
送）とに分けられる。そして、これら双方の衛星放送を
１台の受信機で受信可能とすることは時代の要請でもあ
る。しかし、テレビ放送とＰＣＭ音声放送とは放送方式
が異なるので、受信機側も別個の受信回路が必要とな
り、従って、受信電波から復調した信号も別個独立とな
る。この復調信号は後段の共通音声信号処理装置（又
は、回路）や映像信号処理装置（又は回路）へ入力する
ので該復調出力はそれぞれ別個の出力端子を設けるか、
又は共通出力端子として手動により出力信号を切り換え
る等する必要がある。この場合、前者の、出力端子をテ
レビ放送用と音声放送用とをそれぞれ別個に設けること
はコスト的やスペース性を害し、また、後者の手動切り
換えでは操作上煩わしいという欠点がある。2. Description of the Related Art In recent years, BS (broadcast satellite), CS (communication satellite), etc. have been launched one after another, and a variety of programs are being broadcast. These satellite broadcasts are roughly classified into television broadcasts consisting of video and audio, and audio-only broadcasts (PCM audio broadcasts) in the PCM system centering on music programs. It is also a requirement of the times that both satellite broadcasts can be received by a single receiver. However, since the broadcasting system is different between the television broadcasting and the PCM audio broadcasting, a separate receiving circuit is required on the receiver side, and therefore, the signals demodulated from the received radio waves are also independent. Since this demodulated signal is input to the common audio signal processing device (or circuit) or the video signal processing device (or circuit) in the subsequent stage, the demodulated output is provided with separate output terminals, or
Alternatively, it is necessary to manually switch the output signal as a common output terminal. In this case, providing the output terminals for the television broadcasting and the audio broadcasting separately for the former impairs the cost and space, and the latter manual switching has a drawback that the operation is troublesome.
【０００３】[0003]
【発明が解決しようとする課題】本発明は、テレビ放送
とＰＣＭ音声放送の両者を１台で受信する機器を経済的
且つ合理的なものとするため、それぞれの放送の信号を
自動的に切り換えて１つの端子に出力するようにした衛
星放送受信機の切換装置を提供することを目的とする。SUMMARY OF THE INVENTION The present invention automatically switches the signals of respective broadcasts in order to make a device for receiving both television broadcasts and PCM audio broadcasts economical and rational. It is an object of the present invention to provide a switching device for a satellite broadcast receiver, which is adapted to output to one terminal.
【０００４】[0004]
【課題を解決するための手段】本発明は、前記衛星放送
受信機において、前記ＰＣＭ音声放送から再生した原音
声信号である第１の音声信号と、前記テレビ放送から再
生した原音声信号である第２の音声信号との切り換えを
なす切換回路と、前記ＰＣＭ音声放送の前記再生過程で
行われるビダビ復号の際に発生し、該ＰＣＭ音声放送を
受信したことを示す受信同期状態信号か否かを判別する
判別部とを設け、前記受信同期状態信号であることを判
別したときには前記切換回路を第１の音声信号側へ切り
換え、前記受信同期状態信号であることを判別しないと
きには第２の音声信号側へ切り換えるようにし、さらに
は前記判別部の制御により文字信号等を発生するキャラ
クタゼネレータと、前記音声信号切り換えと連動して切
り換わる映像切換回路とを設け、前記切換回路を第１の
音声信号側へ切り換えたときには映像信号として前記文
字信号を選択するように切り換えるようにした衛星放送
受信機の切換装置を提供するものである。The present invention provides, in the satellite broadcast receiver, a first audio signal which is an original audio signal reproduced from the PCM audio broadcast and an original audio signal reproduced from the television broadcast. A switching circuit for switching to the second audio signal, and whether or not the reception synchronization status signal is generated at the time of Vidabi decoding performed in the reproduction process of the PCM audio broadcast and indicates that the PCM audio broadcast is received. A switching unit for switching to the first audio signal side when it is determined that the reception synchronization state signal is present, and a second audio when it is not determined to be the reception synchronization state signal. A signal generator that switches to the signal side, and further, a character generator that generates a character signal or the like under the control of the determination unit, and a video switch that switches in conjunction with the audio signal switching. A road provided, when switches the switching circuit to the first audio signal side is to provide a switching device of a satellite broadcast receiver has to switch to select the character signal as a video signal.
【０００５】[0005]
【作用】ＰＣＭ音声放送の原信号再生過程ではビタビ復
号を行うが、ＰＣＭ音声を受信した場合には、該ビタビ
復号の際に受信同期状態信号が出力される。判別部は前
記受信同期状態信号を検知したときには切換回路をＰＣ
Ｍ音声放送側へ切り換える。この場合、映像信号もキャ
ラクタゼネレータで発生させた文字信号等に連動して切
り換える。前記受信同期状態信号を検知しない場合に
は、テレビ放送の映像信号および音声信号を選択する。In the original signal reproducing process of PCM audio broadcasting, Viterbi decoding is performed. When PCM audio is received, a reception synchronization state signal is output at the time of Viterbi decoding. When the discriminating unit detects the reception synchronization state signal, the discriminator switches the switching circuit to the PC.
Switch to the M audio broadcasting side. In this case, the video signal is also switched in synchronization with the character signal generated by the character generator. If the reception synchronization state signal is not detected, the video signal and the audio signal of the television broadcast are selected.
【０００６】[0006]
【実施例】以下、図面に基づいて本発明による衛星放送
受信機の切換装置を説明する。図１は本発明による衛星
放送受信機の切換装置の一実施例を示す要部ブロック図
である。図において、１は、アンテナからのＭＳＫ変調
方式ＰＣＭ音声放送信号の搬送周波数を低い周波数に変
換する２ndコンバータ２と、前記ＭＳＫ変調方式のＰＣ
Ｍ音声放送信号を復調するＭＳＫ復調部３と、前記ＭＳ
Ｋ復調した信号の符号誤り訂正をなすビタビ復号部４等
が設けられ、前記音声放送信号から原音声信号である第
１の音声信号（L1／R1）を再生するＰＣＭ音声放送受信
ブロック、５はビタビ復号部４よりの受信同期状態信号
の有無に応じて下記切換回路８の切換制御等をなす判別
部、６は判別部５の制御により、音声放送信号側へ切り
換えた際の映出用である映像信号（文字信号等）V1を生
成するキャラクタゼネレータ、７はアンテナよりのテレ
ビ放送信号から再生した原音声信号である第２の音声信
号（L2／R2）および映像信号V2を再生するテレビ放送受
信ブロック、８は音声放送の第１の音声信号とテレビ放
送の第２の音声信号、及び映像信号の切り換えとを制御
用マイコン５の切換信号S1により切り換える切換回路で
ある。なお、本発明が対象とする音声放送は、ＰＣＭ且
つＭＳＫ変調方式による音声のみの放送である。また、
この音声放送は一般に有料放送のためスクランブルがか
けられており、受信にはスクランブル解除が必要とな
る。DESCRIPTION OF THE PREFERRED EMBODIMENTS A satellite broadcast receiver switching device according to the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of essential parts showing an embodiment of a switching device for a satellite broadcast receiver according to the present invention. In the figure, reference numeral 1 is a 2nd converter 2 for converting a carrier frequency of an MSK modulation type PCM audio broadcast signal from an antenna into a low frequency, and the MSK modulation type PC.
An MSK demodulation unit 3 for demodulating an M audio broadcasting signal;
A PCM audio broadcast receiving block 5 for reproducing a first audio signal (L1 / R1), which is an original audio signal from the audio broadcast signal, is provided with a Viterbi decoding unit 4 for performing code error correction of the K demodulated signal. A discriminating unit for performing switching control of the following switching circuit 8 according to the presence / absence of a reception synchronization state signal from the Viterbi decoding unit 4, and 6 for controlling the discriminating unit 5 for displaying when switching to the audio broadcast signal side. A character generator that generates a certain video signal (character signal, etc.) V1, and 7 is a television broadcast that reproduces the second audio signal (L2 / R2) and the video signal V2, which is the original audio signal reproduced from the television broadcast signal from the antenna. A receiving block 8 is a switching circuit that switches between a first audio signal for audio broadcasting, a second audio signal for television broadcasting, and a video signal by a switching signal S1 of the control microcomputer 5. The audio broadcast targeted by the present invention is an audio-only broadcast based on the PCM and MSK modulation methods. Also,
Since this audio broadcast is generally a pay broadcast, it is scrambled, and descramble is required for reception.
【０００７】次に、本発明の動作について説明する。ア
ンテナで受信し、該アンテナと一体に設けてある１STコ
ンバータ（図示せず）で周波数変換した信号はさらに２
ndコンバータ２で周波数を低い側へ変換してＭＳＫ復調
部３へ送る。該ＭＳＫ復調部３で復調した信号を一般に
「高次多重信号」と称しており、該高次多重信号には、
一般に「低次多重信号」（個々のチャンネル信号）と称
している信号がさらに多重されている。ビタビ復号部４
は上記の高次多重信号（ディジタル信号）に対しビタビ
復号方式による符号誤り訂正を行うものである。この符
号誤り訂正処理後の高次多重信号から低次多重信号を選
局処理することがDEーMULTIPLEX 処理であり、さらにス
クランブル解除の処理がデスクランブル処理である。そ
の他、所定の処理を行い、ＰＣＭ音声放送受信ブロック
１は第１の音声信号（L1／R1）を出力する。Next, the operation of the present invention will be described. The signal received by the antenna and frequency-converted by the 1ST converter (not shown) provided integrally with the antenna is further 2
The nd converter 2 converts the frequency to the lower side and sends it to the MSK demodulator 3. The signal demodulated by the MSK demodulator 3 is generally referred to as "higher-order multiplexed signal".
Signals generally called "low-order multiplexed signals" (individual channel signals) are further multiplexed. Viterbi decoding unit 4
Is a code error correction for the above high-order multiplexed signal (digital signal) by the Viterbi decoding method. The DE-MULTIPLEX process is a process of selecting a low-order multiplex signal from the high-order multiplex signal after the code error correction process, and the descrambling process is a descrambling process. In addition, the PCM audio broadcast receiving block 1 outputs a first audio signal (L1 / R1) by performing a predetermined process.
【０００８】また、テレビ放送受信ブロック７からは、
前記ＰＣＭ音声放送とは方式を異にするテレビ放送を復
調等した第２の音声信号（L2／R2）と映像信号V2（第２
の映像信号）とが出力される。両受信ブロック（１、
７）よりの第１の音声信号（L1／R1）、第２の音声信号
（L2／R2）および第２の映像信号V2の各出力信号は図示
のように切換回路８へ送られる。一方、ビタビ復号部４
において、前述の符号誤り訂正が行われた際には音声放
送を受信していること、即ち、受信同期状態を表す、所
謂「受信同期状態信号」が出力される。該受信同期状態
信号は音声放送を受信しているときには出力されるが、
受信していない場合には出力されない。従って、この受
信同期状態信号の有無でＰＣＭ音声放送を受信したか否
かが判別できる。判別部５はビタビ復号部４が出力する
該受信同期状態信号を検知（判別）したときには切換信
号S1により切換回路８のSW１〜SW３を全てａ側へ切り換
える。この切り換えで本装置はＰＣＭ音声放送を出力す
ることになる（SW１〜３出力端）。From the TV broadcast receiving block 7,
The second audio signal (L2 / R2) and the video signal V2 (second
Video signal) and are output. Both receive blocks (1,
The respective output signals of the first audio signal (L1 / R1), the second audio signal (L2 / R2) and the second video signal V2 from 7) are sent to the switching circuit 8 as shown. On the other hand, the Viterbi decoding unit 4
In the above, when the above-mentioned code error correction is performed, a so-called "reception synchronization state signal" indicating that the audio broadcast is being received, that is, a reception synchronization state is output. The reception synchronization status signal is output when receiving audio broadcasting,
No output if not received. Therefore, it is possible to determine whether or not the PCM audio broadcast is received based on the presence or absence of the reception synchronization state signal. When the determination unit 5 detects (determines) the reception synchronization state signal output from the Viterbi decoding unit 4, the switching signal S1 switches all of SW1 to SW3 of the switching circuit 8 to the a side. By this switching, this device outputs PCM audio broadcasting (SW1 to 3 output terminals).
【０００９】受信同期状態信号を検知しない場合には切
換回路８のSW１〜SW３は全てｂ側を維持する。判別部５
は一般にマイコン等を使用することで容易に実現でき
る。即ち、マイコンのメモリ機能に予め受信同期状態信
号を記憶しておき、ビタビ復号部４より入力される信号
と、該受信同期状態信号とを判別機能で判別し、双方が
一致したと判別したときにはＰＣＭ音声放送を受信した
ことになるので、切換回路８をａ側へ切り換える切換信
号S1を出力する。双方不一致の場合の切換信号S1はｂ側
維持の信号となる。When the reception synchronization state signal is not detected, SW1 to SW3 of the switching circuit 8 are all kept on the side b. Discrimination unit 5
Can generally be easily realized by using a microcomputer or the like. That is, the reception synchronization state signal is stored in advance in the memory function of the microcomputer, and the signal input from the Viterbi decoding unit 4 and the reception synchronization state signal are discriminated by the discrimination function. Since the PCM audio broadcast has been received, the switching signal S1 for switching the switching circuit 8 to the side a is output. The switching signal S1 when both do not match is a signal for maintaining the b side.
【００１０】ここで、切換回路８のSW３（ａ）端に入力
される映像信号V1（第１の映像信号）はキャラクタゼネ
レータ６より出力される文字や図形等の映像信号であ
る。音声放送には映像信号は存在しないので、音声放送
受信時には任意の文字や図形を表示することでディスプ
レイ機能の有効活用を図る目的である。この表示文字や
図形等は判別部５の制御に基づきキャラクタゼネレータ
６より出力される。尚、該キャラクタゼネレータ６には
水平同期信号（HD）と垂直同期信号（VD）とが入力して
おり、映出画像の同期がとられる。映出画像の内容は自
由である。以上の説明のように、音声放送出力とテレビ
放送出力とが自動的に切り換えられることになる。Here, the video signal V1 (first video signal) input to the SW3 (a) end of the switching circuit 8 is a video signal such as a character or a graphic output from the character generator 6. Since the video signal does not exist in the audio broadcast, the purpose is to effectively utilize the display function by displaying arbitrary characters and figures when receiving the audio broadcast. The displayed characters and figures are output from the character generator 6 under the control of the discrimination unit 5. A horizontal synchronizing signal (HD) and a vertical synchronizing signal (VD) are input to the character generator 6 to synchronize the projected image. The content of the projected image is free. As described above, the audio broadcast output and the television broadcast output are automatically switched.
【００１１】[0011]
【発明の効果】以上説明したように本発明によれば、音
声放送受信時のみビタビ復号部で発生する受信同期状態
信号を検知することにより、ＰＣＭ音声放送の音声信号
等とテレビ放送の音声信号等とを自動的に切り換えるこ
とができ、衛星によるＰＣＭ音声放送とテレビ放送との
双方を受信可能とする受信装置の機能向上に寄与するも
のである。As described above, according to the present invention, by detecting the reception synchronization status signal generated in the Viterbi decoding section only when the audio broadcast is received, the audio signal of the PCM audio broadcast and the audio signal of the television broadcast are received. And the like can be automatically switched, which contributes to the improvement of the function of the receiving device capable of receiving both PCM voice broadcasting and television broadcasting by satellite.
【図１】本発明による衛星放送受信機の切換装置の一実
施例を示す要部ブロック図である。FIG. 1 is a block diagram of essential parts showing an embodiment of a switching device for a satellite broadcast receiver according to the present invention.
１ ＰＣＭ音声放送受信ブロック ２ ２ndコンバータ ３ ＭＳＫ復調部 ４ ビタビ復号部 ５ 判別部 ６ キャラクタゼネレータ ７ テレビ放送受信ブロック ８ 切換回路 L1 第１の左音声信号 R1 第１の右音声信号 V1 第１の映像信号 L2 第２の左音声信号 R2 第２の右音声信号 V2 第２の映像信号 S1 切換信号 1 PCM audio broadcast reception block 2 2nd converter 3 MSK demodulation unit 4 Viterbi decoding unit 5 Discrimination unit 6 Character generator 7 TV broadcast reception block 8 Switching circuit L1 First left audio signal R1 First right audio signal V1 First video Signal L2 Second left audio signal R2 Second right audio signal V2 Second video signal S1 Switching signal
Claims (2)
放送の双方を受信可能とする衛星放送受信機において、
前記ＰＣＭ音声放送から再生した原音声信号である第１
の音声信号と、前記テレビ放送から再生した原音声信号
である第２の音声信号との切り換えをなす切換回路と、
前記ＰＣＭ音声放送の前記再生過程で行われるビダビ復
号の際に発生し、該ＰＣＭ音声放送を受信したことを示
す受信同期状態信号か否かを判別する判別部とを設け、
前記受信同期状態信号であることを判別したときには前
記切換回路を第１の音声信号側へ切り換え、前記受信同
期状態信号であることを判別しないときには第２の音声
信号側へ切り換えるようにしたことを特徴とする衛星放
送受信機の切換装置。1. A satellite broadcast receiver capable of receiving both PCM audio broadcast and television broadcast by satellite,
The first audio signal reproduced from the PCM audio broadcast
A switching circuit for switching between the second audio signal, which is the original audio signal reproduced from the television broadcast,
And a determination unit that determines whether or not the reception synchronization state signal is generated during Vidabi decoding performed in the reproduction process of the PCM audio broadcast and indicates that the PCM audio broadcast is received,
The switching circuit is switched to the first audio signal side when it is determined that the signal is the reception synchronization state signal, and is switched to the second audio signal side when it is not determined that the signal is the reception synchronization state signal. A switching device for a characteristic satellite broadcasting receiver.
により文字信号等を発生するキャラクタゼネレータと、
前記音声信号切り換えと連動して切り換わる映像切換回
路とを設け、前記切換回路を第１の音声信号側へ切り換
えたときには映像信号として前記文字信号を選択するよ
うに切り換えることを特徴とする請求項１記載の衛星放
送受信機の切換装置。2. A character generator for generating a character signal and the like under the control of the discrimination unit in the switching device,
A video switching circuit that switches in association with the switching of the audio signal is provided, and switching is performed so that the character signal is selected as a video signal when the switching circuit is switched to the first audio signal side. 1. A switching device for a satellite broadcast receiver according to 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP720693A JPH06217231A (en) | 1993-01-20 | 1993-01-20 | Switching device for satellite broadcat receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP720693A JPH06217231A (en) | 1993-01-20 | 1993-01-20 | Switching device for satellite broadcat receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06217231A true JPH06217231A (en) | 1994-08-05 |
Family
ID=11659546
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP720693A Pending JPH06217231A (en) | 1993-01-20 | 1993-01-20 | Switching device for satellite broadcat receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06217231A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5877817A (en) * | 1996-05-28 | 1999-03-02 | Samsung Electro-Mechanics Co., Ltd. | Digital satellite broadcast receiver having simultaneous multi-channel search function, and control method therefor |
| US7019791B2 (en) | 2001-11-09 | 2006-03-28 | Hitachi, Ltd. | Video processing device |
-
1993
- 1993-01-20 JP JP720693A patent/JPH06217231A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5877817A (en) * | 1996-05-28 | 1999-03-02 | Samsung Electro-Mechanics Co., Ltd. | Digital satellite broadcast receiver having simultaneous multi-channel search function, and control method therefor |
| US7019791B2 (en) | 2001-11-09 | 2006-03-28 | Hitachi, Ltd. | Video processing device |
| US7289168B2 (en) | 2001-11-09 | 2007-10-30 | Hitachi, Ltd. | Video processing device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0828386B1 (en) | Data tranmission and reception device and system, data transmission method and parameter setting method for data reception device | |
| US20060039482A1 (en) | Digital broadcasting system for storing broadcast data and method for transmitting and receiving broadcast data | |
| JP3360399B2 (en) | Digital audio broadcasting receiver | |
| KR19980023115A (en) | Vcr recording system and method for highlight | |
| JP2006191344A (en) | Analog/digital broadcasting reception recording/reproducing device | |
| JPH06217231A (en) | Switching device for satellite broadcat receiver | |
| JPH07162384A (en) | Television receiver and output method for audio signal thereof | |
| KR100775169B1 (en) | Method for playing broadcasting stream stored in digital broadcasting receiver | |
| KR20020014875A (en) | Digital broadcasting receiver built-in MP3 player function | |
| JP4309870B2 (en) | Digital broadcast receiver | |
| US5414456A (en) | Signal receiving apparatus with automatically activated scrambled signal decoder | |
| JP3851069B2 (en) | Digital broadcast receiving system and recording apparatus used therefor | |
| JPH08275073A (en) | Television signal receiver | |
| JPH07240913A (en) | Scramble signal receiver | |
| KR100698648B1 (en) | Mobile communication terminal for streaming without interruption | |
| KR100205815B1 (en) | Method for time setting by kbps in vcr | |
| KR100343708B1 (en) | Audio receiving apparatus for tvcr and control method thereof | |
| KR100233544B1 (en) | Multi-type digital broadcasting receiver | |
| JPH06237423A (en) | Television signal receiver | |
| JP2001339665A (en) | Shared receiver | |
| JPH11275475A (en) | Digital broadcast receiving method and digital broadcast recording and/or reproducing method | |
| JPH06189273A (en) | Transmitted signal reproducing device and signal reproducing device | |
| JP2001008129A (en) | Reception method for digital audio signal and digital audio signal receiver | |
| JPH02172330A (en) | Satellite broadcast receiver | |
| JPH0595552A (en) | Receiver for scramble signal |