Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1982-08-04
1984-08-07
Masinick, Michael A.
Facsimile and static presentation processing
Static presentation processing
Attribute control
H04N 9535
Patent
active
044646755
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 first 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 a second bandpass filter, which provides a sequence of codewords at the codeword rate of the original digitized composite video signal over a given frequency band. 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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Balaban Alvin R.
Steckler Steven A.
Herrmann E. P.
Masinick Michael A.
Rasmussen P. J.
RCA Corporation
Whitacre E. M.
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