JPS57164686A - Synchronizing coupling system for pal synchronizing signal generator - Google Patents
Synchronizing coupling system for pal synchronizing signal generatorInfo
- Publication number
- JPS57164686A JPS57164686A JP4943981A JP4943981A JPS57164686A JP S57164686 A JPS57164686 A JP S57164686A JP 4943981 A JP4943981 A JP 4943981A JP 4943981 A JP4943981 A JP 4943981A JP S57164686 A JPS57164686 A JP S57164686A
- Authority
- JP
- Japan
- Prior art keywords
- pal
- signal
- burst
- pulse
- output
- 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
- H04N11/00—Colour television systems
- H04N11/06—Transmission systems characterised by the manner in which the individual colour picture signal components are combined
- H04N11/12—Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous signals only
- H04N11/14—Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous signals only in which one signal, modulated in phase and amplitude, conveys colour information and a second signal conveys brightness information, e.g. NTSC-system
- H04N11/16—Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous signals only in which one signal, modulated in phase and amplitude, conveys colour information and a second signal conveys brightness information, e.g. NTSC-system the chrominance signal alternating in phase, e.g. PAL-system
Abstract
PURPOSE:To simplify the circuit constitution, by synchronizingly coupling PAL pulses through the use of PAL pulse information included in a phase comparison voltage. CONSTITUTION:An input pulse system composite video signal becomes only a burst signal at a burst separating section 1, and when a subcarrier signal (a) of an output of a voltage controlled oscillator 7 is clamped to a ground potential with a clamp pulse b shaped with this burst signal at a clamp circuit 5, since the PAL burst is phase-separated at each line, the average value of the subcarrier signal (a) of the 1st line H is lower than the ground potential and is increased at the next line. This waveform is shaped and the average value is taken and the output frequency of an oscillator 7 is changed and the subcarrier output signal (a) is synchronizingly coupled with the burst of the input signal. This control signal d initially sets the counter of a PAL pulse generating section 9, allowing to synchronizingly couple this PAL pulse output with the PAL pulse information included in the input signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4943981A JPS57164686A (en) | 1981-04-03 | 1981-04-03 | Synchronizing coupling system for pal synchronizing signal generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4943981A JPS57164686A (en) | 1981-04-03 | 1981-04-03 | Synchronizing coupling system for pal synchronizing signal generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57164686A true JPS57164686A (en) | 1982-10-09 |
Family
ID=12831139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4943981A Pending JPS57164686A (en) | 1981-04-03 | 1981-04-03 | Synchronizing coupling system for pal synchronizing signal generator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57164686A (en) |
-
1981
- 1981-04-03 JP JP4943981A patent/JPS57164686A/en active Pending
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