Television standards converters for converting an input digital

Details Television standards converters for converting an input digital Television standards converters for converting an input digital

1992-01-15

1994-01-18

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 11, 358136, 358105, H04N 701

Patent

active

052803511

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 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 low-pass filters (59) for filtering the resulting correlation magnitudes, subtracters (55 to 58) for subtracting from each correlation magnitude in the range the correlation magnitude corresponding to zero pixel offset, 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: 4862266 (1989-08-01), Gillard
patent: 5023717 (1991-06-01), Lamnabhi et al.
patent: 5068722 (1991-11-01), Sugiyama
patent: 5070403 (1991-12-01), Wilkinson
patent: 5095354 (1992-03-01), Sokawa et al.
patent: 5177610 (1993-01-01), Wilkinson

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