Color television signal sampling clock phase control system

Details Color television signal sampling clock phase control system Color television signal sampling clock phase control system

1988-08-19

1989-06-27

Shepperd, John W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 17, 358 19, 370103, 375111, H04N 1104

Patent

active

048434558

ABSTRACT:
A sampling clock phase control system includes, at a transmitter side, a circuit for generating a first phase reference signal phase-locked with a color burst of an input color television signal, and a multiplexer for multiplexing the color television signal encoded by a first sampling clock and the first phase reference signal and outputting the multiplexed signal to a channel. The control system includes, at a receiver side, a circuit for generating a second phase reference signal phase-locked with a color burst of a decoded color television signal, a phase comparator for comparing the phases of the first and second phase reference signals, and a circuit which is feedback-controlled by an output signal from the phase comparator and generates a sampling clock for D/A-converting a decoded reception signal.

REFERENCES:
patent: 4054904 (1977-10-01), Saitoh et al.
patent: 4591909 (1986-05-01), Kuroda et al.
patent: 4731646 (1988-03-01), Kliem

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