Television – Image signal processing circuitry specific to television – Chrominance-luminance signal separation
Patent
1994-05-16
1996-07-09
Kostak, Victor R.
Television
Image signal processing circuitry specific to television
Chrominance-luminance signal separation
348665, H04N 978
Patent
active
055349471
ABSTRACT:
A method of determining a chrominance element for pixel signals of an optical image for a 1H delay circuit. The pixel signal(s) are first filtered through a band-pass filter to remove low frequency luminance components and a part of the filtered signal is fed through a 1H scan line delay. The result is a OH pixel signal and a 1H pixel signal one scan line apart. The OH pixel signal is added to the 1H pixel signal to generate a combed chrominance component, and the OH pixel signal and the combed chrominance component are compared to see which is the greater. If the value of the OH pixel signal is greater or equal to the combed chrominance component, the combed chrominance component is output as the chrominance element. If the value of the OH pixel signal is less than the combed chrominance component, the OH pixel signal is output as the chrominance element.
REFERENCES:
patent: 4050084 (1977-09-01), Rossi
patent: 4240105 (1980-12-01), Faroadja
patent: 4305091 (1981-12-01), Cooper
patent: 4388729 (1983-06-01), Spencer
patent: 4533070 (1986-02-01), Cooper
patent: 4591911 (1986-05-01), Tanaka
patent: 4803547 (1989-02-01), Stratton
"Separation of NTSC Signals by Minimum Mean Square Error filters and Adaptive Filters"; Maxemchuk and Sharma; IEEE Transactions on Communications; vol. Com-26, #5, May '78.
"Adaptive Noise Canally: Principles and Applications"; Widrow et al.; IEEE Proceedings; vol. 63 #12; Dec. '75.
Kostak Victor R.
Motorola Inc.
Wolin Harry A.
LandOfFree
Advanced comb filter does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Advanced comb filter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Advanced comb filter will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1870858