Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1992-01-15
1993-10-26
Kostak, Victor R.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358105, H04N 701
Patent
active
052571025
ABSTRACT:
A television standards converter for converting an input digital video signal from one television standard to another, comprises a first low-pass filter (35) for filtering the input video signal, a high-pass filter (36) for filtering the low-pass filtered input video signal horizontally and vertically, a plurality 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, respective second low-pass filters (59) for filtering the resulting correlation magnitudes, a selector (62) for determining for each pixel of said video signal 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: 4853775 (1989-08-01), Rouvrais et al.
patent: 4862266 (1989-08-01), Gillard
patent: 5023717 (1991-06-01), Lamnabhi et al.
patent: 5070403 (1991-12-01), Wilkinson
Frommer William S.
Kostak Victor R.
Sinderbrand Alvin
Sony United Kingdom Limited
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