JPS574682A - Secam color discriminating circuit - Google Patents
Secam color discriminating circuitInfo
- Publication number
- JPS574682A JPS574682A JP7774280A JP7774280A JPS574682A JP S574682 A JPS574682 A JP S574682A JP 7774280 A JP7774280 A JP 7774280A JP 7774280 A JP7774280 A JP 7774280A JP S574682 A JPS574682 A JP S574682A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- color
- circuit
- supplied
- signals
- 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
- H04N9/47—Colour synchronisation for sequential signals
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Processing Of Color Television Signals (AREA)
Abstract
PURPOSE:To obtaifn an SECAM color discriminating circuit with high resistivity to noise and assured operation, by discriminating the color with the burst signals of both the R-Y and B-Y signals of two color subcarrier waves. CONSTITUTION:The color signal supplied from an input terminal 3 is supplied to a band pass filter 16 from an amplifying circuit 17 via an amplitude limiting circuit 17, and the signal component containing the B-Y signal of reference subcarrier wave is extracted to suply to an input of a multiplication/wave detection circuit 18. The color signal supplied to an SECAM switch 10 from the circuit 8 is separated into the R-Y and B-Y signals in terms of an output to extract. Then the signal is supplied to the other input of the circuit 18 from the output in which the R-Y signal emerges when the working phase of an FF7 is correct. The difference signal of these two color subcarrier waves is extracted through a band pass filter 19, and a correct color discriminating state is decided when the output level of the difference signal exceeds a certain value. Thus the killer signal is released.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7774280A JPS574682A (en) | 1980-06-11 | 1980-06-11 | Secam color discriminating circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7774280A JPS574682A (en) | 1980-06-11 | 1980-06-11 | Secam color discriminating circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS574682A true JPS574682A (en) | 1982-01-11 |
Family
ID=13642355
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7774280A Pending JPS574682A (en) | 1980-06-11 | 1980-06-11 | Secam color discriminating circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS574682A (en) |
-
1980
- 1980-06-11 JP JP7774280A patent/JPS574682A/en active Pending
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