Television – Image signal processing circuitry specific to television – Dc insertion
Patent
1993-02-05
1995-09-05
Groody, James J.
Television
Image signal processing circuitry specific to television
Dc insertion
348697, H04N 516
Patent
active
054483085
ABSTRACT:
A video signal clamp involves evaluating the difference between the signal level and the desired clamp level during the back porch interval. A correction signal indicates whether the signal level must be increased or decreased to establish the desired clamp level. Generation of the correction signal involves a median filter algorithm. Any required increase or decrease of the signal level occurs continuously throughout each horizontal line interval.
REFERENCES:
patent: 4729026 (1988-03-01), Suzuki et al.
patent: 5084700 (1992-01-01), Christopher
Christopher Todd J.
Ersoz Nathaniel H.
Romesburg Eric D.
Walby Mark D.
Emanuel Peter M.
Groody James J.
Harvey David E.
Shedd Robert D.
Thomson Consumer Electronics Inc.
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