JPS561684A - Recoder for color video signal - Google Patents
Recoder for color video signalInfo
- Publication number
- JPS561684A JPS561684A JP7741579A JP7741579A JPS561684A JP S561684 A JPS561684 A JP S561684A JP 7741579 A JP7741579 A JP 7741579A JP 7741579 A JP7741579 A JP 7741579A JP S561684 A JPS561684 A JP S561684A
- Authority
- JP
- Japan
- Prior art keywords
- amplitude
- signal
- circuit
- composite color
- amplifier
- 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.)
- Granted
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
- H04N9/793—Processing of colour television signals in connection with recording for controlling the level of the chrominance signal, e.g. by means of automatic chroma control circuits
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
Abstract
PURPOSE:To increase the S/N of the composite color signal as well as reduce the cross-color, by recording the amplitude of the recording composite color signal so as to approximate to the amplitude of the carrier chrominance signal and then to be set to the original state when reproduced. CONSTITUTION:Composite color signal Es obtained from input terminal 11 and through the band filter is applied to amplifier 12 to be amplified with amplification degree A>>1. After this, the output signal is applied to output terminal 13 and nonlinear circuit 14. The gain of amplifier 12 is controlled by the control signal sent from the negative feedback circuit consisting of circuit 14, amplitude detector 15 and time constant circuit 16 each. Thus the output of amplifier 12 is set to the fixed amplitude level. At the same time, circuit 14 is used as the diode limiter comprising diodes D1 and D2, and the amplitude of signal Es is recorded so as to approximate to the amplitude of the carrier chrominance signal and then set to the original state when reproduced. As a result, the S/N can be increased for the composite color signal.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7741579A JPS561684A (en) | 1979-06-18 | 1979-06-18 | Recoder for color video signal |
US06/158,729 US4356506A (en) | 1979-06-18 | 1980-06-12 | Automatic chrominance control circuit for a color video tape recorder |
DE3022781A DE3022781C2 (en) | 1979-06-18 | 1980-06-18 | Device for the automatic control of the amplification of a color signal for a video recording device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7741579A JPS561684A (en) | 1979-06-18 | 1979-06-18 | Recoder for color video signal |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS561684A true JPS561684A (en) | 1981-01-09 |
JPS6148317B2 JPS6148317B2 (en) | 1986-10-23 |
Family
ID=13633302
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7741579A Granted JPS561684A (en) | 1979-06-18 | 1979-06-18 | Recoder for color video signal |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS561684A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60154797A (en) * | 1984-01-25 | 1985-08-14 | Hitachi Ltd | Circuit for processing color signal |
-
1979
- 1979-06-18 JP JP7741579A patent/JPS561684A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60154797A (en) * | 1984-01-25 | 1985-08-14 | Hitachi Ltd | Circuit for processing color signal |
Also Published As
Publication number | Publication date |
---|---|
JPS6148317B2 (en) | 1986-10-23 |
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