Digitally controlled phase locked loop system having coarse and

Details Digitally controlled phase locked loop system having coarse and Digitally controlled phase locked loop system having coarse and

1984-11-30

1986-12-30

Shepperd, John W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 13, 358 19, H04N 964, H04N 966, H04N 1104

Patent

active

046332987

ABSTRACT:
A phase detector included in a digital television receiver develops first and second phase error signals based on samples of the color reference burst signal taken from one and two horizontal lines respectively. The first phase error signal is used to attain coarse synchronization between a sampling clock signal and the burst signal. The second phase error signal is used to enhance synchronization accuracy after coarse synchronization has been attained.

REFERENCES:
patent: 4122487 (1978-10-01), Beaulier et al.
patent: 4280099 (1981-07-01), Rattlingourd
patent: 4291332 (1981-09-01), Kato et al.
patent: 4484152 (1984-11-01), Lee

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