Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1983-06-24
1986-02-25
Chin, Tommy P.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358 36, 358318, 307358, H04N 521, H04N 514
Patent
active
045730750
ABSTRACT:
A digital signal processing apparatus includes a digital coring circuit removing samples of digital input signals in a range determined by a digital threshold level signal. The threshold level signal developed by a coring control device is controllable according to the results of comparing at least a portion of the digital input signals to a digital reference level. In a television receiver having digital signal processing circuitry, for example, the coring range is decreased as the luminance signal level increases towards a brighter picture level and is increased as the luminance signal level decreases towards a darker picture level.
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J. Rossi, "Digital Techniques for Reducing Television Noise", SMPTE Journal, vol. 87, Mar. 1978, pp. 134-140.
Berard Jr. Clement A.
Chin Tommy P.
Rasmussen Paul J.
RCA Corporation
Whitacre Eugene M.
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