JPS643373U - - Google Patents
Info
- Publication number
- JPS643373U JPS643373U JP9808087U JP9808087U JPS643373U JP S643373 U JPS643373 U JP S643373U JP 9808087 U JP9808087 U JP 9808087U JP 9808087 U JP9808087 U JP 9808087U JP S643373 U JPS643373 U JP S643373U
- Authority
- JP
- Japan
- Prior art keywords
- converter
- frequency
- carrier wave
- signal
- amplitude
- 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
- 230000005236 sound signal Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 4
Description
第１図は本考案の映像信号の帯域制限回路を示
すブロツク図、第２図は映像信号及び音声信号の
周波数−レベル特性図、第３図はＲＦコンバータ
を内蔵した従来のＶＴＲ技術を示すブロツク図で
ある。
１８……ＲＦコンバータ、２０……ＶＴＲ、２
２……チユーナ、２９……テレビジヨン受像機、
３０……低域フイルタ。
Fig. 1 is a block diagram showing the video signal band limiting circuit of the present invention, Fig. 2 is a frequency-level characteristic diagram of the video signal and audio signal, and Fig. 3 is a block diagram showing the conventional VTR technology with a built-in RF converter. It is a diagram. 18...RF converter, 20...VTR, 2
2...Cyuna, 29...TV receiver,
30...Low frequency filter.
Claims (1)
波を振幅変調して得られる振幅変調信号と、ＶＴ
Ｒにて信号処理された音声信号で音声搬送波を周
波数変調又は振幅変調して得られる周波数変調信
号又は振幅変調信号とを混合して得られる高周波
信号を、テレビジヨン受像機のチユーナに入力さ
せるＲＦコンバータにおいて、該ＲＦコンバータ
の内部或は該ＲＦコンバータの前段に、広帯域化
に伴つて前記音声搬送波に干渉する前記映像信号
の周波数帯域のみを除去する低域フイルタを設け
たことを特徴とする映像信号の帯域制限回路。 An amplitude modulated signal obtained by amplitude modulating a video carrier wave with a video signal processed by a VTR, and a VT
RF that inputs into the tuner of a television receiver a high frequency signal obtained by mixing a frequency modulated signal or an amplitude modulated signal obtained by frequency modulating or amplitude modulating an audio carrier wave with an audio signal processed by R. In the converter, a low-pass filter is provided inside the RF converter or at a stage before the RF converter to remove only the frequency band of the video signal that interferes with the audio carrier wave as the band becomes wider. Signal band limiting circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9808087U JPS643373U (en) | 1987-06-25 | 1987-06-25 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9808087U JPS643373U (en) | 1987-06-25 | 1987-06-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS643373U true JPS643373U (en) | 1989-01-10 |
Family
ID=31324024
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9808087U Pending JPS643373U (en) | 1987-06-25 | 1987-06-25 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS643373U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51138120A (en) * | 1975-05-23 | 1976-11-29 | Mitsumi Electric Co Ltd | Simplified type television signal transmitter |
-
1987
- 1987-06-25 JP JP9808087U patent/JPS643373U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51138120A (en) * | 1975-05-23 | 1976-11-29 | Mitsumi Electric Co Ltd | Simplified type television signal transmitter |
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