JPS5651187A - Burst control oscillator - Google Patents
Burst control oscillatorInfo
- Publication number
- JPS5651187A JPS5651187A JP12835079A JP12835079A JPS5651187A JP S5651187 A JPS5651187 A JP S5651187A JP 12835079 A JP12835079 A JP 12835079A JP 12835079 A JP12835079 A JP 12835079A JP S5651187 A JPS5651187 A JP S5651187A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- circuit
- color
- inverting
- gate
- 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
- H04N9/44—Colour synchronisation
- H04N9/455—Generation of colour burst signals; Insertion of colour burst signals in colour picture signals or separation of colour burst signals from colour picture signals
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Color Television Systems (AREA)
- Processing Of Color Television Signals (AREA)
Abstract
PURPOSE:To facilitate the digital processing of the color TV signal, by obtaining an oscillation signal having the relation of an integral multiple of the horizontal scanning frequency synchronously with the chrominance subcarrier signal of the color TV signal. CONSTITUTION:The color TV signal is given to Y/C separating circuit 2, and luminance signal Y and color signal C are supplied to synchronizing separating circuit 3 and inverting circuit 4 respectively. The horizontal synchronizing signal extracted by circuit 3 is given to counter 5 and burst flag generating circuit 7. Counter 5 generates signal f/2 inverting for every H and signal f/4 inverting for every 2H and supplies them to circuits 4 and 7, and circuit 7 generates burst flag pulse BF for every other 1H and supplied it to gate circuit 6. Circuit 4 inverts the phase of color signal C according to the inversion signal and applied it to gate 6. Gate 6 thins out the output of circuit 4 for every other 1H and gates only the chrominance carrier part of it by signal BF and applies the result to the PLL. The PLL oscillates always frequency f1 matched to the chrominance subcarrier of the input video signal, and f1 becomes an integral multiple of the horizontal frequency.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12835079A JPS5651187A (en) | 1979-10-03 | 1979-10-03 | Burst control oscillator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12835079A JPS5651187A (en) | 1979-10-03 | 1979-10-03 | Burst control oscillator |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5651187A true JPS5651187A (en) | 1981-05-08 |
JPS637078B2 JPS637078B2 (en) | 1988-02-15 |
Family
ID=14982631
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12835079A Granted JPS5651187A (en) | 1979-10-03 | 1979-10-03 | Burst control oscillator |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5651187A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS614390A (en) * | 1984-06-19 | 1986-01-10 | Fujitsu Ltd | Chrominance signal modulating and demodulating system |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5338060A (en) * | 1976-09-21 | 1978-04-07 | Kureha Chemical Ind Co Ltd | Constanttamount transporting apparatus |
-
1979
- 1979-10-03 JP JP12835079A patent/JPS5651187A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5338060A (en) * | 1976-09-21 | 1978-04-07 | Kureha Chemical Ind Co Ltd | Constanttamount transporting apparatus |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS614390A (en) * | 1984-06-19 | 1986-01-10 | Fujitsu Ltd | Chrominance signal modulating and demodulating system |
Also Published As
Publication number | Publication date |
---|---|
JPS637078B2 (en) | 1988-02-15 |
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