Method and apparatus for sharpening television pictures while re

Details Method and apparatus for sharpening television pictures while re Method and apparatus for sharpening television pictures while re

1990-05-08

1991-09-10

Kostak, Victor R.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358167, H04N 514, H04N 5208

Patent

active

050478567

ABSTRACT:
A method and apparatus for shortening the transition times in a video signal while at the same time reducing incidental noise present during the non-transition portions of the video signal. An adjustable sharpness signal is provided which is modulated by a waveform derived from the video signal. This modulated signal is used to provide a boost to the sharpness signal during transition portions of the video signal. An adjustable noise reduction signal may also be provided to adjust the amplitude response of the non-transition portions of the signal.

REFERENCES:
patent: 2678964 (1954-05-01), Loughlin
patent: 2740071 (1956-05-01), Goldmark et al.
patent: 2851522 (1958-09-01), Hollywood
patent: 2863999 (1958-12-01), French
patent: 3946152 (1976-03-01), Illetschko et al.
patent: 4030121 (1977-06-01), Faroudja
patent: 4766489 (1988-08-01), Kato

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