Digital video processing system with raster distortion correctio

Details Digital video processing system with raster distortion correctio Digital video processing system with raster distortion correctio

1983-03-31

1986-07-15

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358242, H04N 514, H04N 568

Patent

active

046009450

ABSTRACT:
In a color television receiver in which video signals are processed in digital form, the rate at which the digital video samples are supplied to a digital-to-analog converter arrangement is varied in a predetermined manner to produce a display that is substantially free of raster distortion. The digital video samples are first entered into a digital store such as a FIFO and then read out of the FIFO by a selected one of four read clocks. The read clocks are of the same frequency but of different phase. By selecting different read clocks to apply to the digital store, the rate at which the store reads out the digital samples is varied.

REFERENCES:
patent: 3893174 (1975-07-01), Sano et al.
patent: 4032888 (1977-06-01), Broyles et al.
patent: 4191998 (1980-03-01), Carmody
patent: 4277797 (1981-07-01), Dangschat et al.
patent: 4281340 (1981-07-01), Mitamura et al.
patent: 4301473 (1981-11-01), Wallace et al.

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