JPS54134925A - Recorder for pal color video signal - Google Patents
Recorder for pal color video signalInfo
- Publication number
- JPS54134925A JPS54134925A JP4286978A JP4286978A JPS54134925A JP S54134925 A JPS54134925 A JP S54134925A JP 4286978 A JP4286978 A JP 4286978A JP 4286978 A JP4286978 A JP 4286978A JP S54134925 A JPS54134925 A JP S54134925A
- Authority
- JP
- Japan
- Prior art keywords
- pilot signal
- signal
- phase
- pulse
- recorder
- 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
- Color Television Systems (AREA)
Abstract
PURPOSE: To prevent the occurrence of a color noise and variation in chromaticity with the definite operation of an APC circuit, by stabilizing the phase of a chrominance signal by inputting a pilot signal with constant phase at a recording time in a horizontal blanking interval.
CONSTITUTION: A color burst signal is smoothed by a filter circuit to obtain a mean phase within one period. A pulse synchronizing with this phase is inputted to a gate circuit and a gate pulse is formed from a horizontal synchronizing pulse. A pilot signal in a burst shape is therefore formed in each horizontal blanking interval. The pilot signal is added to a chrominance signal and then frequency- converted before being recorded. At the time of regeneration, only the pilot signal can be extracted and on the basis of the pilot signal, APC of the chrominance signal is performed.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4286978A JPS54134925A (en) | 1978-04-12 | 1978-04-12 | Recorder for pal color video signal |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4286978A JPS54134925A (en) | 1978-04-12 | 1978-04-12 | Recorder for pal color video signal |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54134925A true JPS54134925A (en) | 1979-10-19 |
JPS643116B2 JPS643116B2 (en) | 1989-01-19 |
Family
ID=12648034
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4286978A Granted JPS54134925A (en) | 1978-04-12 | 1978-04-12 | Recorder for pal color video signal |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54134925A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4809084A (en) * | 1985-02-04 | 1989-02-28 | Matsushita Electric Industrial Co., Ltd. | Apparatus for processing video signal |
EP0311117A2 (en) * | 1987-10-08 | 1989-04-12 | Victor Company Of Japan, Limited | VTR having pilot signal control function for selecting playback luminance signal filter characteristics |
-
1978
- 1978-04-12 JP JP4286978A patent/JPS54134925A/en active Granted
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4809084A (en) * | 1985-02-04 | 1989-02-28 | Matsushita Electric Industrial Co., Ltd. | Apparatus for processing video signal |
EP0311117A2 (en) * | 1987-10-08 | 1989-04-12 | Victor Company Of Japan, Limited | VTR having pilot signal control function for selecting playback luminance signal filter characteristics |
EP0669770A2 (en) * | 1987-10-08 | 1995-08-30 | Victor Company Of Japan, Limited | VTR having a chrominance sub-carrier phase shifting circuit |
EP0669770A3 (en) * | 1987-10-08 | 1996-01-03 | Victor Company Of Japan | VTR having a chrominance sub-carrier phase shifting circuit. |
Also Published As
Publication number | Publication date |
---|---|
JPS643116B2 (en) | 1989-01-19 |
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