Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1990-10-03
1991-05-14
Groody, James J.
Facsimile and static presentation processing
Static presentation processing
Attribute control
H04N 978
Patent
active
050160923
ABSTRACT:
A multimode comb filter for comb filtering, e.g., NTSC and/or PAL video signals includes delay means for concurrently providing video signals representing first, second and third adjacent horizontal lines. First and second combining means coupled to the delay means provide alternate 1-H comb filtered signals in both the NTSC and PAL modes. Control circuitry coupled to the delay means generates a control signal for adaptively selecting the one of the alternate 1-H comb filtered signals or appropriate proportions of both alternate 1-H comb filtered signals to form an output comb filtered signal. In the NTSC mode the control circuitry generates the control signal from sums of vertically aligned pairs of samples from said first and second lines and from said second and third lines. In the PAL mode the control signal is generated from alternating sums and differences of vertically aligned pairs of samples from said first and second lines and from said second and third lines.
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Ser. No. 07/437,952 filed 11/17/89, An Adaptive Multistandard Video Comb Filter, S. S. Perlman (priority document).
Greening Wendy R.
Groody James J.
Hayes James B.
Herrmann Eric P.
RCA Licensing Corporation
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