JPS5625884A - Color demodulation unit - Google Patents
Color demodulation unitInfo
- Publication number
- JPS5625884A JPS5625884A JP10242279A JP10242279A JPS5625884A JP S5625884 A JPS5625884 A JP S5625884A JP 10242279 A JP10242279 A JP 10242279A JP 10242279 A JP10242279 A JP 10242279A JP S5625884 A JPS5625884 A JP S5625884A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- demodulator
- fed
- output
- switch 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.)
- Pending
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
- H04N9/465—Synchronisation of the PAL-switch
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Processing Of Color Television Signals (AREA)
Abstract
PURPOSE:To obtain two color difference signals R-Y and B-Y signals in PAL system, by using one local subcarrier oscillator without providing the local subcarrier oscillator. CONSTITUTION:In the carrier chrominance signal, it is fed to the difference operation circuits 2 and 6, phase shifters 3, 7 and switch circuits 4, 8 and the signal including R-Y chroma signal is fed to the R-Y demodulator 5, and that including B-Y is fed to the B-Y demodulator 9. On the other hand, the burst signal is picked up from the chroma carrier signal at the burst pickup circuit 10, this signal is fed to the switch circuit 13 and the automatic phase control circuit 17 controlled at the half frequency divider 15 to control the local subcarrier oscillator 18. The output of the oscillator 18 is demodulated at the R-Y demodulator 5 and the output of the phase shifter 19 demodulates the B-Y demodulator 9. Further, the switch circuit 4 is controlled at the frequency divider 15, and the switch circuit 8 is controlled with the output of the switch circuit and the output of the control circuit 16 taking the phase shifter 19 as the input.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10242279A JPS5625884A (en) | 1979-08-10 | 1979-08-10 | Color demodulation unit |
US06/139,222 US4337477A (en) | 1979-04-19 | 1980-04-11 | Color demodulating apparatus |
DE19803015459 DE3015459A1 (en) | 1979-04-19 | 1980-04-18 | COLOR DEMODULATOR CIRCUIT |
GB8012862A GB2054314B (en) | 1979-04-19 | 1980-04-18 | Colour signal demodulating apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10242279A JPS5625884A (en) | 1979-08-10 | 1979-08-10 | Color demodulation unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5625884A true JPS5625884A (en) | 1981-03-12 |
Family
ID=14327006
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10242279A Pending JPS5625884A (en) | 1979-04-19 | 1979-08-10 | Color demodulation unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5625884A (en) |
-
1979
- 1979-08-10 JP JP10242279A patent/JPS5625884A/en active Pending
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