Progressive scan processor with plural frequency band interpolat

Details Progressive scan processor with plural frequency band interpolat Progressive scan processor with plural frequency band interpolat

1986-05-23

1987-06-16

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 11, H04N 701

Patent

active

046739785

ABSTRACT:
A speed-up circuit time compresses and interlaces field delayed and interpolated lines of a video input signal for display in progressive scan fashion. The interpolated lines are produced by adding low and high frequency components derived from the video input signal. The low frequency component is produced by frame-combing and low pass filtering the input signal. The high frequency component is obtained by field delaying, line comb filtering and low pass filtering the input signal. The combined low and high frequency components are spatially and temporally coincident thereby reducing the visibility of motion artifacts (double images) on the display.

REFERENCES:
patent: 4400719 (1983-08-01), Powers
patent: 4415931 (1983-11-01), Dischert
patent: 4521802 (1985-06-01), Ikeda
patent: 4524379 (1985-06-01), Okada

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