Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1980-05-07
1982-02-02
Martin, John C.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358905, H04N 521
Patent
active
043142770
ABSTRACT:
A television signal ghost eliminator is described, including a transversal filter having an input terminal, an output terminal at which a processed video signal is produced, a plurality of signal processing stages serially coupled between the input and output terminals, and a plurality of input taps coupled to the signal processing stages. A detected video signal is applied to the input terminal of the transversal filter and is transferred through the serially coupled stages. A circuit is responsive to the processed video signal for developing a plurality of weighting function signals which are applied to the input taps. The weighting function signals applied to the taps are combined with the detected video signal as it appears at the tapped stages, resulting in reduction in ghost signal components in the processed video signal which is produced at the output terminal of the transversal filter.
REFERENCES:
patent: 3935536 (1976-01-01), Kimura et al.
patent: 4044381 (1977-08-01), Shimano et al.
patent: 4127874 (1978-11-01), Iwasawa et al.
patent: 4158209 (1979-06-01), Levine
patent: 4162411 (1979-07-01), Sakaue
Sakaue et al., "Digitally-Controlled and Electrically-Programmable CCD Transversal Filter LSI," Proceedings of 5th International Conference on Charge-Coupled Devices, (1979), pp. 222-229.
Makino et al., "A Fully Automatic Ghost Canceller," IEEE Trans. on C.E., vol. CE-24, No. 3, Aug. 1978, pp. 267 et seq.
Ciciora, "A Tutorial on Ghost Cancelling in Television Systems," IEEE Trans. on C.E., vol. CE-25, Feb. 1979, pp. 9-44.
Pritchard Dalton H.
Schroeder Alfred C.
Brinton Yorks, Jr. W.
Martin John C.
Meagher William H.
Rasmussen Paul J.
RCA Corporation
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