JPS5481026A - Frequency converter for secam color video signal - Google Patents
Frequency converter for secam color video signalInfo
- Publication number
- JPS5481026A JPS5481026A JP14900877A JP14900877A JPS5481026A JP S5481026 A JPS5481026 A JP S5481026A JP 14900877 A JP14900877 A JP 14900877A JP 14900877 A JP14900877 A JP 14900877A JP S5481026 A JPS5481026 A JP S5481026A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- circuit
- converted
- video signal
- 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.)
- Granted
Links
Abstract
PURPOSE: To reject noise on the screen at reproduction, by performing frequency conversion with AC signal formed every horizontal pulse for the chrominance signal, and specifying the phase of the AC signal through picking up non-modulation signal component from the chrominance signal.
CONSTITUTION: The luminance signal Sy is picked up from the video signal via LPE, and it is converted into FM signal Sf with the FM modulation circuit 17 and is fed to the adder 19 via HPF 18. Further, chrominance signal Ss is picked up from the video signal via BPF 31 and it is converted with the AC signal Su through the frequency converter 34. The horizontal synchronizing signal Ss is converted into the discrimination signal Si since no modulation is made at the back porch period of the horizontal synchronizing pulse Ph and is fed as the regulation signal of the oscillation phase of the oscillator circuit 71. This circuit eliminates the cross talk between tracks and the circuit constitution is simplified.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP52149008A JPS6012835B2 (en) | 1977-12-12 | 1977-12-12 | SECAM color video signal frequency conversion device |
US05/960,839 US4220964A (en) | 1977-11-21 | 1978-11-15 | Secam recording and reproducing system |
AU41641/78A AU521182B2 (en) | 1977-11-21 | 1978-11-16 | Video signal recording and reproduction |
DE19782849759 DE2849759A1 (en) | 1977-11-21 | 1978-11-16 | CIRCUIT ARRANGEMENT FOR RECORDING SECAM COLOR IMAGE SIGNALS ON A RECORDING MEDIUM |
CA316,438A CA1124835A (en) | 1977-11-21 | 1978-11-17 | Secam recording and reproducing system |
GB7845196A GB2008891B (en) | 1977-11-21 | 1978-11-20 | Video signal recording and reproduction |
IT29964/78A IT1101115B (en) | 1977-11-21 | 1978-11-20 | VIDEO SIGNAL RECORDING AND REPRODUCTION APPARATUS |
NL7811465A NL7811465A (en) | 1977-11-21 | 1978-11-21 | DEVICE FOR RECORDING AND / OR DISPLAY OF COLOR VIDEO SIGNALS OF THE SECAM TYPE. |
FR7832817A FR2409650A1 (en) | 1977-11-21 | 1978-11-21 | SECAM TELEVISION SIGNAL RECORDING AND REPRODUCTION DEVICE |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP52149008A JPS6012835B2 (en) | 1977-12-12 | 1977-12-12 | SECAM color video signal frequency conversion device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5481026A true JPS5481026A (en) | 1979-06-28 |
JPS6012835B2 JPS6012835B2 (en) | 1985-04-03 |
Family
ID=15465644
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP52149008A Expired JPS6012835B2 (en) | 1977-11-21 | 1977-12-12 | SECAM color video signal frequency conversion device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6012835B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5619981U (en) * | 1979-07-20 | 1981-02-21 | ||
JPS5619982U (en) * | 1979-07-20 | 1981-02-21 |
-
1977
- 1977-12-12 JP JP52149008A patent/JPS6012835B2/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5619981U (en) * | 1979-07-20 | 1981-02-21 | ||
JPS5619982U (en) * | 1979-07-20 | 1981-02-21 | ||
JPS6119590Y2 (en) * | 1979-07-20 | 1986-06-12 | ||
JPS6119591Y2 (en) * | 1979-07-20 | 1986-06-12 |
Also Published As
Publication number | Publication date |
---|---|
JPS6012835B2 (en) | 1985-04-03 |
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