JPS57118489A - Color killer circuit - Google Patents
Color killer circuitInfo
- Publication number
- JPS57118489A JPS57118489A JP12758280A JP12758280A JPS57118489A JP S57118489 A JPS57118489 A JP S57118489A JP 12758280 A JP12758280 A JP 12758280A JP 12758280 A JP12758280 A JP 12758280A JP S57118489 A JPS57118489 A JP S57118489A
- Authority
- JP
- Japan
- Prior art keywords
- demodulator
- color
- circuit
- noise
- color killer
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/64—Circuits for processing colour signals
- H04N9/70—Circuits for processing colour signals for colour killing
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Processing Of Color Television Signals (AREA)
Abstract
PURPOSE:To eliminate the malfunction, by comparing the color burst demodulation outputs of two color modulators with each other to produce a color killer signal so that the noise is given from both demodulators in the same way and is cancelled with each other. CONSTITUTION:A color killer circuit 7 carries out the comparison of amplitude between the color burst period output of a B-Y demodulator 6 and the color burst period output of an R-Y demodulator 4 or a G-Y demodulator 5 to obtain a killer signal. Thus the noise is supplied to the circuit 7 from the demodulator 6 and the demodulator 4 or 5 in nearly the same condition to be offset by the in-phase eliminating effect, etc. within the circuit 7. As a result, the circuit 7 has a stable operation to the noise.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12758280A JPS57118489A (en) | 1980-09-11 | 1980-09-11 | Color killer circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12758280A JPS57118489A (en) | 1980-09-11 | 1980-09-11 | Color killer circuit |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16846381A Division JPS57131189A (en) | 1981-10-20 | 1981-10-20 | Color killing circuit |
JP16846481A Division JPS57127372A (en) | 1981-10-20 | 1981-10-20 | Color killer circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57118489A true JPS57118489A (en) | 1982-07-23 |
JPS6254274B2 JPS6254274B2 (en) | 1987-11-13 |
Family
ID=14963623
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12758280A Granted JPS57118489A (en) | 1980-09-11 | 1980-09-11 | Color killer circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57118489A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6194488A (en) * | 1984-10-15 | 1986-05-13 | Matsushita Electric Ind Co Ltd | Chrominance components processing device |
-
1980
- 1980-09-11 JP JP12758280A patent/JPS57118489A/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6194488A (en) * | 1984-10-15 | 1986-05-13 | Matsushita Electric Ind Co Ltd | Chrominance components processing device |
JPH058630B2 (en) * | 1984-10-15 | 1993-02-02 | Matsushita Electric Ind Co Ltd |
Also Published As
Publication number | Publication date |
---|---|
JPS6254274B2 (en) | 1987-11-13 |
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