Timing correction circuitry as for TV signal recursive filters

Details Timing correction circuitry as for TV signal recursive filters Timing correction circuitry as for TV signal recursive filters

1985-07-31

1987-05-19

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358337, 358 36, 360 361, H04N 5213, H04N 595

Patent

active

046672400

ABSTRACT:
In memory-based video signal processing systems such as frame recursive filters, for example, system performance is dependent upon critical timing relationships between incoming signals and delayed signals produced from the memory. Video signal from various sources, e.g. VTR's, tend to have jittering time bases that generally have prevented the use of such memory-based processing systems. The jittering signals may be standardized, in sampled data format, by effecting adaptive signal delays responsive to a measure of the relative phase of the sampling clock with respect to horizontal synchronizing pulses. The phase measure is used to control an interpolator which combines successive samples in proportions to develop sample values that should have occurred at the sample times had the signal not been jittering.

REFERENCES:
patent: 4393397 (1983-07-01), Holmes
patent: 4559560 (1985-12-01), Murata et al.
patent: 4581642 (1986-04-01), Poetsch et al.

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