JPS57127373A - Reproducer of color video signal - Google Patents
Reproducer of color video signalInfo
- Publication number
- JPS57127373A JPS57127373A JP56012569A JP1256981A JPS57127373A JP S57127373 A JPS57127373 A JP S57127373A JP 56012569 A JP56012569 A JP 56012569A JP 1256981 A JP1256981 A JP 1256981A JP S57127373 A JPS57127373 A JP S57127373A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- jitter
- video signal
- signal
- color
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/79—Processing of colour television signals in connection with recording
- H04N9/80—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
- H04N9/82—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only
- H04N9/83—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only the recorded chrominance signal occupying a frequency band under the frequency band of the recorded brightness signal
- H04N9/84—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only the recorded chrominance signal occupying a frequency band under the frequency band of the recorded brightness signal the recorded signal showing a feature, which is different in adjacent track parts, e.g. different phase or frequency
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
Abstract
PURPOSE:To reproduce and deliver a color video signal of an SECAN system of a high quality with a simple circuit constitution, by processing a synthetic color signal reproduced out of a recording medium with a jitter and accordingly reducing the phase shift to completely eliminate the jitter. CONSTITUTION:A synthetic color video signal containing a jitter which is reproduced out of a recording medium is supplied to an input terminal 1. This video signal is applied to a delaying circuit 10 and a frequency converter 11, and the frequency of the signal is converted by the difference to a prescribed frequency. Thus the phase shift is reduced for a carrier chrominance signal supplied from a subtracter circuit 13 forming a comb-shaped filter. The output of the circuit 13 is supplied to an automatic phase control circuit 24, a demodulating circuit 28, etc., and a demodulating color subcarrier which is synchronous with the color burst signal in the carrier chrominance signal with elimination of the phase shift caused by the jitter is delivered from the circuit 24 to be applied to a switch circuit 27. Then the subcarrier waves having the phases different of each other by 90 deg. are applied to the circuit 28 with every 1H. Thus the fluctuation of the hue due to the jitter can be completely eliminated. In such way, a color video signal of an SECAN system is obtained with high quality through a simple constitution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56012569A JPS57127373A (en) | 1981-01-30 | 1981-01-30 | Reproducer of color video signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56012569A JPS57127373A (en) | 1981-01-30 | 1981-01-30 | Reproducer of color video signal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57127373A true JPS57127373A (en) | 1982-08-07 |
Family
ID=11808978
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56012569A Pending JPS57127373A (en) | 1981-01-30 | 1981-01-30 | Reproducer of color video signal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57127373A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5320817A (en) * | 1976-08-09 | 1978-02-25 | Rca Corp | Device for forming synthesized color video signal |
-
1981
- 1981-01-30 JP JP56012569A patent/JPS57127373A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5320817A (en) * | 1976-08-09 | 1978-02-25 | Rca Corp | Device for forming synthesized color video signal |
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