JPS5694893A - Process circuit of color video signal - Google Patents
Process circuit of color video signalInfo
- Publication number
- JPS5694893A JPS5694893A JP17224879A JP17224879A JPS5694893A JP S5694893 A JPS5694893 A JP S5694893A JP 17224879 A JP17224879 A JP 17224879A JP 17224879 A JP17224879 A JP 17224879A JP S5694893 A JPS5694893 A JP S5694893A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- signal
- output
- carrier chrominance
- comb
- 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
- H04N9/77—Circuits for processing the brightness signal and the chrominance signal relative to each other, e.g. adjusting the phase of the brightness signal relative to the colour signal, correcting differential gain or differential phase
- H04N9/78—Circuits for processing the brightness signal and the chrominance signal relative to each other, e.g. adjusting the phase of the brightness signal relative to the colour signal, correcting differential gain or differential phase for separating the brightness signal or the chrominance signal from the colour television signal, e.g. using comb filter
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Processing Of Color Television Signals (AREA)
Abstract
PURPOSE:To eliminate the cross-color disturbance and thus obtain a high-quality color picture, by constituting a process circuit with a comb-shaped filter using a delay circuit which separtates and delivers the luminance signal or the carrier chrominace signal plus a level expanding circuit which gives the level expansion property. CONSTITUTION:The color video signal supplied from the input terminal 1 is supplied to the 1H-delay circuit 2, and the carrier chrominance signal is extracted out of the output of the circuit 2 and by the subtractor circuit 3. Then the carrier chrominance signal of a prescribed frequency is delivered from the band pass filter 9 using a comb-shaped filter. At the same time, the luminance signal of a prescribed frequency is delivered from the band pass filter 13 using a comb-shaped filter. The outputs of the filters 9 and 16 are applied to the level expanders 10 and 14 respectively with te level expansion property given. Thus the carrier chrominance signal with the cross-color disturbance eliminated is delivered from the output terminal 11 of the expander 10. The output of the expander 14 is applid to the adder 15 to be added by the output of the band blocking filter 12. Thus the carrier chrominance signal of a prescribed frequency is eliminated to deliver the luminance signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17224879A JPS5694893A (en) | 1979-12-28 | 1979-12-28 | Process circuit of color video signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17224879A JPS5694893A (en) | 1979-12-28 | 1979-12-28 | Process circuit of color video signal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5694893A true JPS5694893A (en) | 1981-07-31 |
Family
ID=15938361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17224879A Pending JPS5694893A (en) | 1979-12-28 | 1979-12-28 | Process circuit of color video signal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5694893A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6129583U (en) * | 1984-07-26 | 1986-02-22 | ソニー株式会社 | Luminance signal separation circuit |
| US4766484A (en) * | 1986-04-11 | 1988-08-23 | Avesco P.L.C. | NTSC/PAL switchable video color decoder using a digital comb filter and method |
| JPH01236889A (en) * | 1988-03-17 | 1989-09-21 | Fujitsu General Ltd | Y/c separating circuit |
-
1979
- 1979-12-28 JP JP17224879A patent/JPS5694893A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6129583U (en) * | 1984-07-26 | 1986-02-22 | ソニー株式会社 | Luminance signal separation circuit |
| JPH04632Y2 (en) * | 1984-07-26 | 1992-01-09 | ||
| US4766484A (en) * | 1986-04-11 | 1988-08-23 | Avesco P.L.C. | NTSC/PAL switchable video color decoder using a digital comb filter and method |
| JPH01236889A (en) * | 1988-03-17 | 1989-09-21 | Fujitsu General Ltd | Y/c separating circuit |
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