Ghost cancellation circuit

Details Ghost cancellation circuit Ghost cancellation circuit

1991-03-28

1992-11-03

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 37, H04N 521, H04N 964, H04N 5208

Patent

active

051610175

ABSTRACT:
A ghost cancellation circuit has serially connected non-recursive and recursive filters. The circuit first calculates filter coefficients for the non-recursive filter based on a received ghost cancellation reference (GCR) signal and a GCR signal previously stored in this circuit. The calculated coefficients are set to the non-recursive filter. Then, time-series data of an output of the non-recursive filter with regard to the received GCR signal are set to the recursive filter as its filter coefficients.

REFERENCES:
patent: 4404600 (1983-09-01), Murakami
patent: 4476491 (1984-10-01), Murata et al.
patent: 4583120 (1986-04-01), Murakami et al.
patent: 5065241 (1991-11-01), Iga

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