JPH05168028A - Television receiver - Google Patents
Television receiverInfo
- Publication number
- JPH05168028A JPH05168028A JP33021491A JP33021491A JPH05168028A JP H05168028 A JPH05168028 A JP H05168028A JP 33021491 A JP33021491 A JP 33021491A JP 33021491 A JP33021491 A JP 33021491A JP H05168028 A JPH05168028 A JP H05168028A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- circuit
- luminance
- chrominance
- 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.)
- Pending
Links
Landscapes
- Color Television Systems (AREA)
- Processing Of Color Television Signals (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、例えば複数の色信号方
式を受信するテレビジョン受信機などに適用して好適な
ものである。BACKGROUND OF THE INVENTION The present invention is suitable for application to, for example, a television receiver which receives a plurality of color signal systems.
【0002】[0002]
【従来の技術】従来複数の異なる色信号方式を受信する
テレビジョン受信機(以下マルチ方式テレビと略す)に
おいては、入力された複合映像信号(以下映像信号と略
す)を選択し、その信号は色信号方式に応じて複数具え
られた輝度、色信号分離回路(以下Y/C分離回路と略
す)に加えられ、輝度信号と色信号に分離される。分離
された輝度信号映像処理回路へ、色信号は色復調回路へ
と伝送されて復調され、最終的にはCRT上に映像とし
て再生される。2. Description of the Related Art Conventionally, in a television receiver (hereinafter, abbreviated as a multi-channel television) which receives a plurality of different color signal systems, an input composite video signal (hereinafter abbreviated as a video signal) is selected and the signal is A plurality of luminance and color signal separation circuits (hereinafter abbreviated as Y / C separation circuits) provided according to the color signal system are added to separate the luminance signal and the color signal. The chrominance signal is transmitted to the separated luminance signal image processing circuit, demodulated and transmitted to the color demodulation circuit, and finally reproduced as an image on the CRT.
【0003】[0003]
【発明が解決しようとする課題】ところが一般にマルチ
方式テレビにおいては、輝度信号、色信号が信号方式に
応じて正しく再生されるために、映像信号がその色信号
方式に応じたY/C分離回路に加えられるよう回路選択
が必要である。すなわち、図3に示すように、入力信号
が選択された後、信号方式に対応するY/C分離回路へ
の切り換え回路により信号切り換えが行われる。またこ
の信号切り換えの制御は制御回路からの専用信号線を介
して行われる。したがって従来のマルチ方式テレビにお
いては信号の切り換え回路が複雑化するという問題点を
有していた。本発明は以上の点を考慮しなされたもの
で、単純化された信号切り換え回路を持つテレビジョン
受信機を提供しようとするものである。In general, however, in a multi-system television, since a luminance signal and a color signal are correctly reproduced according to the signal system, a Y / C separation circuit in which the video signal corresponds to the color signal system. Circuit selection is required to be added to. That is, as shown in FIG. 3, after the input signal is selected, the switching circuit to the Y / C separation circuit corresponding to the signal system switches the signal. Further, this signal switching control is performed via a dedicated signal line from the control circuit. Therefore, the conventional multi-system television has a problem that the signal switching circuit becomes complicated. The present invention has been made in consideration of the above points, and an object of the present invention is to provide a television receiver having a simplified signal switching circuit.
【0004】[0004]
【課題を解決するための手段】かかる問題点を解決する
ため本発明においては、複合映像信号の選択回路と、選
択された信号を輝度信号と色信号へ分離するためのY/
C分離回路への出力回路と、複数のY/C分離回路から
の信号切り換え手段を持ち、複合映像信号選択回路の制
御とY/C分離回路からの入力信号切り換えの制御とを
同一の制御信号線で行う集積回路を設けるようにする。In order to solve such a problem, in the present invention, a selection circuit for a composite video signal and Y / Y for separating the selected signal into a luminance signal and a chrominance signal are provided.
An output circuit to the C separation circuit and a signal switching means from a plurality of Y / C separation circuits are provided, and the control of the composite video signal selection circuit and the control of the input signal switching from the Y / C separation circuit are the same control signal. Provide an integrated circuit that is performed by wires.
【0005】[0005]
【作用】複合映像信号の選択と、Y/C分離回路からの
輝度信号および色信号の切り換えをひとつの集積回路
で、また、同一の制御信号線を使用することで、切り換
え回路が単純化される。The switching circuit is simplified by selecting the composite video signal and switching the luminance signal and the chrominance signal from the Y / C separation circuit by one integrated circuit and by using the same control signal line. It
【0006】[0006]
【実施例】以下図面に基づいて、本発明をマルチ方式テ
レビに適用した一実施例を詳述する。図1において、ア
ンテナ1から得られた高周波信号はチューナ2により複
合映像信号に復調される。また外部入力端子3には外部
映像機器からの複合映像信号が入力される。これらの信
号は信号切り換え集積回路5により画面に表示すべき信
号が選択され、偏向回路8、Y/C信号分離回路6、分
離回路7に加えられる。偏向回路へ加えられた映像信号
は走査線の制御を行う。Y/C信号分離回路6およびY
/C分離回路7は映像信号の色方式に対応して異なった
回路特性を持っている。分離された輝度信号(以下Y信
号と略す)と色信号(以下C信号と略す)はそれぞれ輝
度信号処理回路9、色信号復調回路10で処理された
後、CRTに加えられる。色信号復調回路では色信号の
復調とともに色信号方式の判別を行っており、正しい色
復調が行われるよう、受像したい信号の色信号方式に対
応したY/C分離回路からの信号が輝度処理回路、色信
号変調回路に加わるよう制御回路4を通じて信号切り換
え集積回路5を切り換える。図2は信号切り換え集積回
路5の詳細である。複合映像信号は入力端子13に加え
られ、内部スイッチ14により切り換えられ、増幅器1
5で増幅された後映像出力端子16より出力される。Y
/C分離回路からの輝度信号は端子17より入力され、
内部スイッチ18で切り換えられた後出力端子19より
出力される。色信号も同様の構成の回路を通る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a multi system television will be described in detail below with reference to the drawings. In FIG. 1, the high frequency signal obtained from the antenna 1 is demodulated by the tuner 2 into a composite video signal. A composite video signal from an external video device is input to the external input terminal 3. For these signals, signals to be displayed on the screen are selected by the signal switching integrated circuit 5 and added to the deflection circuit 8, the Y / C signal separation circuit 6 and the separation circuit 7. The video signal applied to the deflection circuit controls the scanning line. Y / C signal separation circuit 6 and Y
The / C separation circuit 7 has different circuit characteristics corresponding to the color system of the video signal. The separated luminance signal (hereinafter abbreviated as Y signal) and color signal (hereinafter abbreviated as C signal) are processed by the luminance signal processing circuit 9 and the color signal demodulation circuit 10, respectively, and then added to the CRT. The color signal demodulation circuit discriminates the color signal system as well as the color signal demodulation, and the signal from the Y / C separation circuit corresponding to the color signal system of the signal to be received is the luminance processing circuit so that the correct color demodulation is performed. , The signal switching integrated circuit 5 is switched through the control circuit 4 so as to be added to the color signal modulation circuit. FIG. 2 shows the details of the signal switching integrated circuit 5. The composite video signal is applied to the input terminal 13 and switched by the internal switch 14, and the amplifier 1
After being amplified at 5, it is output from the video output terminal 16. Y
The luminance signal from the / C separation circuit is input from terminal 17,
After being switched by the internal switch 18, it is output from the output terminal 19. The color signal also passes through a circuit having a similar configuration.
【0007】これら内部スイッチ14、18、21の切
り換えは制御信号線22を通して制御部からの制御信号
により行われる。Switching of these internal switches 14, 18 and 21 is performed by a control signal from a control section through a control signal line 22.
【0008】以上の構成によれば、新たなY/C分離信
号切り換え回路を使用することなく色信号方式に応じた
Y/C分離信号の切り換えを行うことができる。According to the above configuration, it is possible to switch the Y / C separation signal according to the color signal system without using a new Y / C separation signal switching circuit.
【0009】[0009]
【発明の効果】以上のように本発明によれば、入力映像
信号選択回路とY/C分離回路への出力回路と、Y/C
分離回路からの輝度および色信号の切り換え回路をも
ち、切り換えを入力映像信号と同一の信号線制御により
行うことのできる信号集積回路を具えることにより信号
切り換え回路が簡略化でき、マルチ方式テレビの実現が
容易になる。As described above, according to the present invention, the input video signal selection circuit, the output circuit to the Y / C separation circuit, and the Y / C
The signal switching circuit can be simplified by using a signal integrated circuit that has a switching circuit for the luminance and chrominance signals from the separation circuit and can be switched by the same signal line control as that of the input video signal. Realization becomes easy.
【図1】本発明の一実施例におけるテレビジョン受信機
のブロック図FIG. 1 is a block diagram of a television receiver according to an embodiment of the present invention.
【図2】本発明の信号切り換え集積回路の詳細ブロック
図FIG. 2 is a detailed block diagram of a signal switching integrated circuit of the present invention.
【図3】従来のテレビジョン受信機のブロック図FIG. 3 is a block diagram of a conventional television receiver.
5 信号切り換え集積回路 6 Y/C分離回路 7 Y/C分離回路 14 映像入力切り換えスイッチ 16 映像出力端子 17 輝度信号切り換えスイッチ 21 色信号切り換えスイッチ 5 signal changeover integrated circuit 6 Y / C separation circuit 7 Y / C separation circuit 14 video input changeover switch 16 video output terminal 17 luminance signal changeover switch 21 color signal changeover switch
───────────────────────────────────────────────────── フロントページの続き (72)発明者 平原 裕明 大阪府門真市大字門真1006番地 松下電器 産業株式会社内 (72)発明者 中谷 昭男 大阪府門真市大字門真1006番地 松下電器 産業株式会社内 (72)発明者 渡辺 喜直 大阪府門真市大字門真1006番地 松下電器 産業株式会社内 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Hiroaki Hirahara 1006 Kadoma, Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Akio Nakatani, 1006 Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd. 72) Inventor Yoshinao Watanabe 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.
Claims (2)
選択された信号を輝度信号と色信号へ分離するための分
離回路への出力回路と、複数の輝度、色信号分離回路か
らの入力の切り換え手段を持つ集積回路を具えたことを
特徴とするテレビジョン受信機1. A selection circuit for inputting a plurality of composite video signals,
A television characterized by comprising an output circuit to a separation circuit for separating the selected signal into a luminance signal and a chrominance signal, and an integrated circuit having means for switching the inputs from the plurality of luminance and chrominance signal separation circuits. John receiver
手段は、複合映像信号の切り換え制御信号と同一の信号
線を使用する手段でなる請求項1記載のテレビジョン受
信機2. The television receiver according to claim 1, wherein the switching means for the plurality of luminance and color signal input circuits is means for using the same signal line as the switching control signal for the composite video signal.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP33021491A JPH05168028A (en) | 1991-12-13 | 1991-12-13 | Television receiver |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP33021491A JPH05168028A (en) | 1991-12-13 | 1991-12-13 | Television receiver |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH05168028A true JPH05168028A (en) | 1993-07-02 |
Family
ID=18230125
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP33021491A Pending JPH05168028A (en) | 1991-12-13 | 1991-12-13 | Television receiver |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH05168028A (en) |
-
1991
- 1991-12-13 JP JP33021491A patent/JPH05168028A/en active Pending
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