Television – Image signal processing circuitry specific to television – Noise or undesired signal reduction
Patent
1997-01-30
2000-02-08
Peng, John K.
Television
Image signal processing circuitry specific to television
Noise or undesired signal reduction
348609, 348607, 348665, 386 21, 386113, 386114, H04N 594
Patent
active
060233036
ABSTRACT:
An output signal of an 1H delaying circuit and a signal received from an input terminal are supplied to a subtracting circuit that forms a comb line filter. Thus, even if a dropout takes place in a luminance signal, not in a chroma signal, the chroma signal can be obtained from an output signal at intervals of 1H. When a dropout takes place, a limit operation of a feedback loop that forms a noise reduction circuit is stopped and the coefficient is increased. This process is performed with a dropout pulse that is delayed by 1H. Thus, the chroma signal can be obtained on the next line of the line having the dropout.
REFERENCES:
patent: 4245262 (1981-01-01), Ohtsu
patent: 4490748 (1984-12-01), Kamath
patent: 4510530 (1985-04-01), Miura et al.
patent: 4571613 (1986-02-01), Fukuda
patent: 4684976 (1987-08-01), Sugihara et al.
patent: 4748498 (1988-05-01), Yamanishi et al.
patent: 4750033 (1988-06-01), Fukuda et al.
patent: 4771341 (1988-09-01), Shimizu et al.
patent: 4786978 (1988-11-01), Kawasaki
patent: 4807050 (1989-02-01), Takeuchi et al.
patent: 4827342 (1989-05-01), Ohta et al.
patent: 4843457 (1989-06-01), Yamagata
patent: 4849808 (1989-07-01), Rossi
patent: 4930005 (1990-05-01), Yamada et al.
patent: 5016111 (1991-05-01), Sakamoto et al.
patent: 5047866 (1991-09-01), Watanabe et al.
patent: 5166794 (1992-11-01), Tanaka
patent: 5280396 (1994-01-01), Hamaguchi et al.
patent: 5291278 (1994-03-01), Nishigori
patent: 5333054 (1994-07-01), Tanaka et al.
patent: 5398114 (1995-03-01), Han
patent: 5448305 (1995-09-01), Hagino
patent: 5587804 (1996-12-01), Moon et al.
patent: 5633689 (1997-05-01), Willis et al.
patent: 5640211 (1997-06-01), Kawano et al.
Desir Jean W.
Frommer William S.
Peng John K.
Sony Corporation
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