Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1991-06-10
1992-08-11
Groody, James J.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358905, H04N 5213, H04N 5210
Patent
active
051384531
ABSTRACT:
A circuit for detecting a wave distortion in a circuit for eliminating a ghost wave component, wherein a received video signal is applied to a transversal filter, a reference signal for cancelling a ghost signal (GCR signal) is taken out from an output signal from the transversal filter, a ghost wave component is picked up from the GCR signal, a signal for controlling a transmission characteristic of the transversal filter is formed on the basis of the picked-up ghost wave component, and the control signal is applied to the transversal filter to thereby extract from the filter a video signal from which the ghost wave component is cancelled. This circuit includes a variable limiter provided on a signal line for transmitting the control signal to the transversal filter and an unit for controlling a limiter level of the variable limiter to be decreased with time.
REFERENCES:
patent: 4413282 (1983-11-01), Wargo
patent: 4458269 (1984-07-01), Schroeder
patent: 4476491 (1984-10-01), Murata
patent: 4667241 (1987-05-01), Saito
patent: 5053870 (1991-10-01), Ito
Kobayashi Satoshi
Kume Tsutomu
Nagamine Takatomo
Saito Jun'ya
Eslinger Lewis H.
Groody James J.
Hsia Sherrie
Maioli Jay H.
Sony Corporation
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