JPS6489692A - Chrominance signal modulation and demodulation device - Google Patents
Chrominance signal modulation and demodulation deviceInfo
- Publication number
- JPS6489692A JPS6489692A JP62243949A JP24394987A JPS6489692A JP S6489692 A JPS6489692 A JP S6489692A JP 62243949 A JP62243949 A JP 62243949A JP 24394987 A JP24394987 A JP 24394987A JP S6489692 A JPS6489692 A JP S6489692A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- burst
- carrier chrominance
- phase
- reference signal
- 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
- Processing Of Color Television Signals (AREA)
Abstract
PURPOSE:To dispense with two pieces of PLL circuits for modulating/ demodulating a reproduced carrier chrominance signal by making the color difference signal of the reproduced carrier chrominance signal capable of being both demodulated and modulated in synchronism with the burst signal of other carrier chrominance signal. CONSTITUTION:The reproduced carrier chrominance signal is inputted to a frequency converter 20, and the burst signal is extracted by a burst extraction circuit 21. After synchronizing the phase of this burst signal with the phase of a reference signal from a reference signal oscillator 23, the carrier chrominance signal is fetched, and the color difference signals of two kinds are demodulated by synchronous detection circuits 25A, 25B, and those are stored in a memory 27 through A/D converters 26A, 26B. The phase of the reference signal from the reference signal oscillator 23 is synchronized with the phase of the burst signal in a received video signal. The color difference signal, read out of the memory 27, is modulated by a carrier signal, generated based on the reference signal from the reference signal oscillator 23.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62243949A JPS6489692A (en) | 1987-09-30 | 1987-09-30 | Chrominance signal modulation and demodulation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62243949A JPS6489692A (en) | 1987-09-30 | 1987-09-30 | Chrominance signal modulation and demodulation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6489692A true JPS6489692A (en) | 1989-04-04 |
Family
ID=17111433
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62243949A Pending JPS6489692A (en) | 1987-09-30 | 1987-09-30 | Chrominance signal modulation and demodulation device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6489692A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05199538A (en) * | 1992-01-20 | 1993-08-06 | Matsushita Electric Ind Co Ltd | Double screen display circuit |
| JPH077741A (en) * | 1993-02-26 | 1995-01-10 | Samsung Electron Co Ltd | Method and circuit for color signal demodulation |
| WO1996033577A1 (en) * | 1995-04-21 | 1996-10-24 | Sony Corporation | Method and circuit for synchronizing phase of video signal, and combining device |
-
1987
- 1987-09-30 JP JP62243949A patent/JPS6489692A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05199538A (en) * | 1992-01-20 | 1993-08-06 | Matsushita Electric Ind Co Ltd | Double screen display circuit |
| JPH077741A (en) * | 1993-02-26 | 1995-01-10 | Samsung Electron Co Ltd | Method and circuit for color signal demodulation |
| WO1996033577A1 (en) * | 1995-04-21 | 1996-10-24 | Sony Corporation | Method and circuit for synchronizing phase of video signal, and combining device |
| CN1110969C (en) * | 1995-04-21 | 2003-06-04 | 索尼公司 | Method and circuit for synchronizing phase of video signal, and combining device |
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