Picture signal processing system including spatio-temporal filte

Details Picture signal processing system including spatio-temporal filte Picture signal processing system including spatio-temporal filte

1982-12-09

1985-11-05

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358133, 358138, H04N 502

Patent

active

045517533

ABSTRACT:
A picture signal processing for converting a wideband high quality picture signal between interlace and sequential scanning systems is effected through a spatio-temporal filter based on multi-dimensional coordinates consisting of at least vertical frequency and temporal frequency axes. A passing region of the spatio-temporal filter is restricted to lower regions of the multi-dimensional coordinates including an origin thereof for separating original picture signal components from unnecessary signal components generated by the scanning conversion in order to maintain the high picture quality. The performance of the spatio-temporal filter is improved in consideration of the motion of the picture and the ambiguous contour of the still picture which is caused by the scanning conversion.

REFERENCES:
patent: 3832487 (1974-08-01), de Miet
patent: 4275422 (1981-06-01), Le Couteur
patent: 4298888 (1981-11-01), Colles et al.
patent: 4386367 (1983-05-01), Peterson et al.
patent: 4449143 (1984-05-01), Dischert et al.

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