JPS54124636A - Color demodulation circuit - Google Patents
Color demodulation circuitInfo
- Publication number
- JPS54124636A JPS54124636A JP3249578A JP3249578A JPS54124636A JP S54124636 A JPS54124636 A JP S54124636A JP 3249578 A JP3249578 A JP 3249578A JP 3249578 A JP3249578 A JP 3249578A JP S54124636 A JPS54124636 A JP S54124636A
- Authority
- JP
- Japan
- Prior art keywords
- color
- signals
- pulse
- color difference
- circuit
- 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
Landscapes
- Processing Of Color Television Signals (AREA)
Abstract
PURPOSE: To demodulate signals accurately and simply by utilizing the non-modulation carrier, which is included in chrominance signals, in the demodulation of a SECAM-system color television.
CONSTITUTION: Original chrominance signals DI include blue and red color difference signals and are transmitted to color difference signal demodulator circuit 5 and 6 for blue and red at a prescribed timing by switching circuit 3. Switching is performed by output FO of the flip-flop which uses fly-back pulse EP as trigger pulse TR. Demodulated color difference signals BO and RO are supplied to color blanking circuits 7 and 8. Then, horizontal periodical pulse WH is obtained from fly-back pulse FP and is supplied to a color blanking circuit, and color demodulation signals B-Y and R-Y are outputted. The period of the non-modulation carrier is utilized as a sampling hold voltage of control output circuits 9 and 10.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3249578A JPS54124636A (en) | 1978-03-22 | 1978-03-22 | Color demodulation circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3249578A JPS54124636A (en) | 1978-03-22 | 1978-03-22 | Color demodulation circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54124636A true JPS54124636A (en) | 1979-09-27 |
JPS6142918B2 JPS6142918B2 (en) | 1986-09-24 |
Family
ID=12360568
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3249578A Granted JPS54124636A (en) | 1978-03-22 | 1978-03-22 | Color demodulation circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54124636A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03111510U (en) * | 1990-02-26 | 1991-11-14 |
-
1978
- 1978-03-22 JP JP3249578A patent/JPS54124636A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS6142918B2 (en) | 1986-09-24 |
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