System for adjusting filters processing the composite video sign

Details System for adjusting filters processing the composite video sign System for adjusting filters processing the composite video sign

1991-08-21

1993-11-23

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 38, 358904, H04N 546

Patent

active

052649369

ABSTRACT:
A system for adjusting filters processing the composite video signal in a multistandard set by determining the tuning phases during the quiescent phases of the composite video signal. A reference signal (f.sub.ref) is applied to the filter during the tuning phases; a phase-locked loop supplies an error signal corresponding to the phase-shift of the filter; and means (14) are provided for storing the error signal of the phase-locked loop.

REFERENCES:
patent: 4476491 (1984-10-01), Murata et al.
patent: 5032916 (1991-07-01), Matsura et al.
Elektor Electronics, "Single-Chip Multi-Standard Colour Decoder", No. 156, May 1988, pp. 57-59.
IEEE Transactions on Consumer Electronics, "Cost Effective Hi-Performance Color Television", No. 4, Nov. 1987, CE-33, pp. 499-506.
IEEE Transactions on Consumer Electronics, "A Fully Automatic Multistandard TV Chrominance Decoder", CE-31, No. 3, Aug. 1985, pp. 147-155.

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