Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1982-08-04
1985-02-19
Murray, Richard
Facsimile and static presentation processing
Static presentation processing
Attribute control
H04N 9535
Patent
active
045009120
ABSTRACT:
A sampled data filter for separating chrominance signal from digitized composite video sampled at a 4f.sub.sc rate produces filtered sampled data chrominance signal at one half the input sample rate. The input video signal occurring as a 4f.sub.sc +I, +Q, -I, -Q sample sequence is decimated in the filter so that only the filtered replicas of the +I and +Q samples are computed. This effectively doubles the computational time permitted the filter circuitry without substantially compromising signal content.
REFERENCES:
patent: 3863022 (1975-01-01), Bruch
patent: 4333104 (1982-06-01), Geller
R. E. Crochiere and L. R. Rabiner, "Interpolation and Decimation of Digital Signals--A Tutorial Review", Proc. IEEE, vol. 69, No. 3, Mar. 1981, pp. 300-331.
D. W. Rorabacher, "Efficient FIR Filter Design for Sample Rate Reduction or Interpolation", Proc. IEEE, Int. Symp. Circuits and Systems, pp. 396-399, Apr. 1975.
D. J. Goodman, et al., "Nine Digital Filters for Decimation and Interpolation", IEEE Trans. Acoustics, Speech and Signal Process, vol. ASSP-25, No. 2, Apr. 1975, pp. 121-126.
Herrmann E. P.
Murray Richard
Rasmussen P. J.
RCA Corporation
Whitacre E. M.
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