Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1989-02-13
1990-04-17
Groody, James J.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358148, H04N 508
Patent
active
049185250
ABSTRACT:
A method based on clamping of composite video signals on sync level and on level black, summation of the two differently clamped signals and comparing with the constant clamping level. Processing is simplified and the slicing precision is improved. The device includes two clamping units (1, 2), and adder (3) and a level comparator (4).
REFERENCES:
patent: 3699256 (1972-10-01), Roth
patent: 4233629 (1980-11-01), Dayton
Hedlund, Lee V. "A Self Starting and Clamping Sync Separator for Television Signals" RCA TN No. 709 6/67.
AMPEX TBC-3, Catalog No. 1809636-01 issued Feb. 1985 (401 Broadway, Redwood City, CA 94063.
Bulgarska Televisia Kam Komitet SA Televisia I Radio
Dubno Herbert
Groody James J.
Harvey David E.
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