Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1982-08-04
1984-09-04
Murray, Richard
Facsimile and static presentation processing
Static presentation processing
Attribute control
H04N 9535
Patent
active
044700695
ABSTRACT:
A comb filter arrangement operating at a reduced data rate is provided, which requires comparably fewer storage locations than previous arrangements. A digitized composite video signal of a given codeword rate is applied to a bandpass filter, which produces a filtered signal restricted to a portion of the passband of the composite video signal. The filtered signal is then subsampled at a rate which satisfies the Nyquist criterion for information of the restricted passband. Codewords, now at a reduced data rate, are applied to a one-H delay line, and delayed and undelayed signals are combined to produce a first comb-filtered signal. The first comb-filtered signal is then applied to an interpolator, which provides a sequence of codewords at the codeword rate of the original digitized composite video signal. This sequence of codewords is then combined with the codewords of the composite video signal to produce a second comb-filtered signal.
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Bolger Thomas V.
Lewis, Jr. Henry G.
Herrmann Eric P.
Murray Richard
Rasmussen Paul J.
RCA Corporation
Whitacre Eugene M.
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