Generalized chrominance signal demodulator for a sampled data te

Details Generalized chrominance signal demodulator for a sampled data te Generalized chrominance signal demodulator for a sampled data te

1986-09-25

1988-05-17

Groody, James J.

Facsimile and static presentation processing

Static presentation processing

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358 13, H04N 950

Patent

active

047454636

ABSTRACT:
In an NTSC digital television receiver, the composite video signal is digitized with a sampling frequency of 32/13 times the color subcarrier frequency, f.sub.c. The chrominance signal component of this video signal is demodulated using a pair of finite impulse responsive filters having programmable weighting factors. The weighting factors are changed in a 32 step sequence as 32 consecutive chrominance samples are applied to the filters. The circuitry which generates the weighting factors is responsive to a phase alignment signal to determine when the 32 step sequence begins.

REFERENCES:
patent: 4322739 (1982-03-01), Drewery et al.
patent: 4349833 (1982-09-01), Clarke

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