Television ghost signal detector with color burst phase delay co

Details Television ghost signal detector with color burst phase delay co Television ghost signal detector with color burst phase delay co

1981-10-05

1983-07-12

Chin, Tommy P.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358167, 358905, H04N 521

Patent

active

043933971

ABSTRACT:
A television ghost signal detector system is provided which includes a variable delay line for delaying training signal components of the main video signal. The training signal includes burst signals and may comprise, for example, the horizontal sync pulse and burst signals of the lines of the vertical blanking interval which follow the last equalizing pulse interval. The delay of the delay line is first varied until the delayed horizontal sync pulse of the main signal is in substantial time coincidence with its ghost horizontal sync pulse at the input of the delay line, and the delayed main burst signal and its ghost are in substantial time coincidence. Thereafter, the two burst signals are compared by a phase detector, the output of which is used as a control signal to control the delay of the variable delay line so as to maintain the delayed and undelayed signal in virtually complete coincidence.

REFERENCES:
patent: 3824340 (1974-07-01), Sensney
patent: 3974520 (1976-08-01), Kuroyanagi
patent: 4128848 (1978-12-01), Nakagawa
patent: 4314277 (1982-02-01), Pritchard et al.
patent: 4359760 (1982-11-01), Holmes
Article "Performance Evaluations of Selected Automatic Deghosting Systems for Television" by S. Goyal, et al., published in the IEEE Transactions on Consumer Electronics, vol. CE-26, 2/80, p. 102.

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