JPS5549089A - Color signal reproduction system of video player - Google Patents
Color signal reproduction system of video playerInfo
- Publication number
- JPS5549089A JPS5549089A JP12405278A JP12405278A JPS5549089A JP S5549089 A JPS5549089 A JP S5549089A JP 12405278 A JP12405278 A JP 12405278A JP 12405278 A JP12405278 A JP 12405278A JP S5549089 A JPS5549089 A JP S5549089A
- Authority
- JP
- Japan
- Prior art keywords
- carrier
- signal
- phase
- output
- modulation
- 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
Abstract
PURPOSE: To eliminate color phase irregularity by canceling variation in time axis of a recording and reproducing system by performing carrier suppressing AM modulation and recording of a sub-carrier phase-inverted by a color difference signal in each line period and than obtaining the mean phase of adjacent scanning line outputs of a reproduction output of a picture signal.
CONSTITUTION: First color difference signal B-Y is applied to AM modulator 5 and an output from sub-carrier wave generator 3 which generates frequency fS= (n+1/4)fH (fH; line frequency) is passed through 90°-phase shifter 4 to obtain a signal, by which carrier suppressing AM modulation is performed. Further, 2nd phase difference signal R-Y is applied to AM modulator 10 and carrier suppressing AM modulation is performed by a signal leading or lagging a sub-carrier from generator 3 by 90° by turns. Further, outputs from modulators 5 and 10 are added by adder 11, whose output and luminance signal Y is added by adder 12, an output from which is recorded on a recording medium where chroma signals have been recorded. In reproduction, chroma signals are reproduced and signals, obtained by inverting sum and difference components of chroma signals between adjacent scanning lines, are added, thereby canceling variation in time axis.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12405278A JPS5549089A (en) | 1978-10-04 | 1978-10-04 | Color signal reproduction system of video player |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12405278A JPS5549089A (en) | 1978-10-04 | 1978-10-04 | Color signal reproduction system of video player |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5549089A true JPS5549089A (en) | 1980-04-08 |
Family
ID=14875777
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12405278A Pending JPS5549089A (en) | 1978-10-04 | 1978-10-04 | Color signal reproduction system of video player |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5549089A (en) |
-
1978
- 1978-10-04 JP JP12405278A patent/JPS5549089A/en active Pending
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