Clock generation apparatus for a digital television system

Details Clock generation apparatus for a digital television system Clock generation apparatus for a digital television system

1983-05-17

1984-07-31

Chin, Tommy P.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 19, H04N 504

Patent

active

044633718

ABSTRACT:
A digital signal processing system of a television receiver includes a digital to analog converter for converting an analog television signal to representative digital samples at times corresponding to pulses of a sampling signal. Clock signal generating is provided to selectively shift the phase of the sampling signal from that corresponding to the -(B-Y) and (R-Y) color reference vectors to that corresponding to the I and Q, color reference vectors as modified by a tint adjustment, at a time during each horizontal scanning interval before beginning of the image interval. In this manner, digital -(B-Y) chrominance samples corresponding to the peaks of the color burst signal component are made available for digital automatic chrominance gain control and digital I and Q chrominance samples are made available for digital color demodulation.

REFERENCES:
patent: 3946432 (1976-03-01), Goldberg et al.
patent: 4122487 (1978-10-01), Beaulier et al.
patent: 4376948 (1983-03-01), Dischert et al.

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