Digital color video signal encoder

Details Digital color video signal encoder Digital color video signal encoder

1983-06-22

1985-10-15

Shepperd, John W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 16, H04N 938

Patent

active

045477965

ABSTRACT:
A digital encoder for use with digital luminance and chrominance signals having black levels includes a level adjusting circuit which adjusts the chrominance and luminance signals to establish a predetermined relationship between the black levels of the level-adjusted chrominance and luminance signals, a chrominance signal with a predetermined relatively large dynamic range thereof modulating circuit which generates a modulated chrominance signal from the level-adjusted chrominance signal, an adding circuit which receives the modulated chrominance signal and the level-adjusted luminance signal and provides an encoded color video signal therefrom, an attenuator circuit which attenuates the encoded color video signal and a circuit for combining sync and burst signals with the attenuated encoded color video signal and with a predetermined pedestal level to provide a composite color video signal within the predetermined dynamic range.

REFERENCES:
patent: 4275411 (1981-06-01), Lippel
patent: 4396937 (1983-08-01), Reitmeier et al.

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