Ghost canceling circuit

Details Ghost canceling circuit Ghost canceling circuit

1989-03-13

1990-01-30

Peng, John K.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 36, 358905, H04N 5123, H04N 964

Patent

active

048977250

ABSTRACT:
A ghost canceling circuit comprising a Fourier transforming circuit for Fourier transforming a reference waveform contained in the received television signal while converting the analogue signal into digital form, a device for holding and outputting a reference waveform Fourier coefficient obtained by Fourier transforming the reference waveform contained in the television signal at the transmission side, a signal processing portion in which the outputted reference waveform Fourier coefficient is divided by the result of the A/D conversion, the divided Fourier coefficient is reverse Fourier transformed, and the reverse Fourier transformed Fourier coefficient is supplied to a transversal filter recognizing it as a tap gain.

REFERENCES:
patent: 3956585 (1976-05-01), Butler et al.
patent: 4476491 (1984-10-01), Murata et al.
patent: 4502077 (1985-02-01), Morotomi et al.

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