Television standards converters

Details Television standards converters Television standards converters

1992-01-15

1993-01-05

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358105, H04N 701

Patent

active

051776103

ABSTRACT:
A television standards converter for converting an input digital video signal from one television standard to another, comprises a high-pass filter (36) for filtering the input video signal horizontally and vertically, a pluraity of parallel processing channels comprising respective circuits (43 to 58) for determining pixel by pixel of the high-pass filtered video signal the correlation magnitudes for a range of horizontal and vertical pixel offsets, low-pass filters (59) for filtering the resulting correlation magnitudes, a selecter (62) for determining for each pixel of said video signal, from the relationship between motion vector magnitude and the correlation magnitude, the motion vector corresponding to the maximum correlation magnitude, and a temporal interpolator (FIG. 14) for deriving interpolated fields or frames by combining sample values offset by the motion vectors.

REFERENCES:
patent: 5068722 (1991-11-01), Sugiyama
patent: 5089887 (1992-02-01), Robert
patent: 5095354 (1992-03-01), Sokawa

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