Circuit arrangement for digitizing and storing color video signa

Details Circuit arrangement for digitizing and storing color video signa Circuit arrangement for digitizing and storing color video signa

1983-10-28

1985-10-22

Shepperd, John W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358310, 360 331, H04N 932

Patent

active

045492018

ABSTRACT:
An input composite color video signal is processed to derive a luminance signal and three primary color signals first, and then only a high frequency component of the luminance signal is A/D converted by a first A/D converter, while only low frequency component of each of the three primary color signals is A/D converted by a second A/D converter with the low frequency component of the three primary color signals being time-shared by a first switching circuit to be a single analog signal. The A/D converted chrominance information is fed to a second switching circuit comprising shift registers of parallel-in and serial-out type so that three bits respectively indicative of red, green and blue signals are simultaneously outputted therefrom. The A/D converted luminance data of a plurality of bits, and three bits indicative of three primary colors are simultaneously written into a memory.

REFERENCES:
patent: 3921203 (1975-11-01), Okey
patent: 3946431 (1976-03-01), Gantert
patent: 4376948 (1983-03-01), Dischert et al.
I. G. Brown, Primary Signal Component Coding, 1980 International Broadcasting Convention Conference Publication 191, pp. 344-349.

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