Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1989-04-28
1991-11-05
Shepperd, John W.
Facsimile and static presentation processing
Static presentation processing
Attribute control
358312, H04N 964
Patent
active
050634372
ABSTRACT:
This invention relates to a method and apparatus for processing a color video signal. The processing method separates an input composite color video signal into a luminance signal and chrominance signal, demodulates the separated chrominance signal into color difference signals, stores the separated luminance signal and color difference signals in a memory, reads out the luminance signal and color differnece signals in units of 1-field period from the memory, implements the extension or reduction of the field period length alternately for every certain number of fields in reading out the luminance signal and color difference signals from the memory thereby to fix the phase relation between a residual chrominance signal component in the luminance signal read out of the memory and a chrominance signal produced by modulating the color subcarrier with the color difference signals read out of the memory, implements an intended signal processing for the readout signals, modulates the color subcarrier with processed color difference signals to produce a chrominance signal, and mixes the chrominance signal with processed luminance signal to produce a composite color video signal.
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Masuda Michio
Minabe Kohji
Nishijima Hideo
Ohtsubo Hiroyasu
Owashi Hitoaki
Hitachi , Ltd.
Shepperd John W.
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