Television – Format – Specified color signal format
Patent
1992-06-18
1994-11-15
Peng, John K.
Television
Format
Specified color signal format
348492, 348642, 348182, H04N 1116, H04N 1104
Patent
active
053652754
ABSTRACT:
Disclosed is a method and apparatus for highly stably and accurately generating a PAL video signal by digital processing. The method and apparatus comprise generating a basic clock having a frequency which is 11.times.N times (N: an integer) as high as a horizontal synchronization frequency F.sub.H, producing digital data of orthogonal color subcarriers, color difference signals and a luminance signal respectively with the timing of the basic clock, multiplying the digital data D.sub.B-Y D.sub.R-Y of the color difference signals by the digital data Dsin and Dcos of the color subcarriers respectively to obtain digital data of two kinds of modulation signals, adding the digital data D.sub.Y+S of the luminance signal to the digital data of the two modulation signals, and effecting digital/analog conversion of the addition to provide the PAL video signal.
REFERENCES:
patent: 4349833 (1982-09-01), Clarke
patent: 4500909 (1985-02-01), Machida
patent: 4605953 (1986-08-01), Wilkinson et al.
patent: 4663654 (1987-05-01), Morrison
patent: 4982179 (1991-01-01), Ogawa et al.
Hill A.
Matsushita Electric - Industrial Co., Ltd.
Peng John K.
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