Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1990-04-30
1993-05-11
Groody, James J.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358160, 358164, H04N 504
Patent
active
052106063
ABSTRACT:
A television receiver includes a "one-chip" television signal processing IC which has a terminal for receiving a composite video signal including both image and synchronization pulse components. A composite video signal which has been non-linearly processed by a so-called "black-stretch" circuit is coupled to the composite video signal input terminal of the "one-chip" IC. In order that a sync separator of the "one-chip" IC can reliably separate the synchronization pulses from the composite video signal after it has been non-linearly processed, a sync correction circuit, including an auxiliary sync separator, is used to modify the synchronization pulses of the composite video signal after it is non-linearly processed and before it is coupled to the "one-chip" television IC.
REFERENCES:
patent: 2227050 (1940-12-01), White et al.
patent: 4489349 (1984-12-01), Okada
patent: 4583120 (1986-04-01), Murakami et al.
patent: 4667234 (1987-05-01), Kluth
Data sheet Sony CX20125 IC.
Section 13-3-1. "Black level correction (dynamic black) circuit", p. 71 of technical description of G7U.
Lagoni William A.
Lineberry Roger L.
Emanuel Peter M.
Groody James J.
Harvey David E.
Thomson Consumer Electronics Inc.
Tripoli Joseph S.
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