Method and apparatus for encoding component digital video signal

Details Method and apparatus for encoding component digital video signal Method and apparatus for encoding component digital video signal

1987-03-06

1988-05-03

Shepperd, John W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 23, 358 31, H04N 1104, H04N 1116

Patent

active

047423862

ABSTRACT:
A component digital video signal is encoded such that first and second color components CB, CR are modulated on the lower sideband of a carrier at the Nyquist frequency of the luminance component Y. The encoding method involves alternately adding and subtracting the luminance and color component signals Y+C, Y-C, Y+C, Y-C, (etc) and changing the phase relationship between this addition and subtraction for the first and second color components every field, so that in each alternate field the addition and subtraction operations are in phase for both color components CB, CR and in every other field, the operations are out of phase. Upon decoding, the encoded video signal is comb filtered to recover the luminance component Y and color components CB, CR, and the correct phase for the color components (CB, CR) is restored by a phase alternation operation which is inverse to that applied during encoding.

REFERENCES:
patent: 2736859 (1956-02-01), Pritchard et al.
patent: 4051516 (1977-09-01), Weston
patent: 4322739 (1982-03-01), Drewery et al.
patent: 4464685 (1984-08-01), Wilkinson
patent: 4589011 (1986-05-01), Rzeszewski
patent: 4660072 (1987-04-01), Fukinuki

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