Ghost reduction device for removing ghost components of a televi

Details Ghost reduction device for removing ghost components of a televi Ghost reduction device for removing ghost components of a televi

1991-05-14

1993-05-11

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358167, 358 36, 358 37, H04N 521

Patent

active

052106071

ABSTRACT:
A ghost elimination device equipped in a television receiver extracts a reference signal from the television signal, the reference signal being inserted in the television signal in a certain sequence or at random with the intention of ghost elimination, implements the sequence decoding process and noise elimination process for the reference signal, and controls the characteristics of the ghost eliminating transversal filter which suppresses the transmission distortion. The device includes a sequence decoding circuit for decoding the transmission sequence of the reference signal, a transversal filter for suppressing the distortion of transmission path disposed in a rear stage of sequence decoding circuit, and a controller which introduces the reference signal provided by the filter to control the characteristics of the filter or apply the output of the sequence decoding circuit to the transversal filter through a noise elimination filter. The transversal filter has a tapped delay line formed of registers with an initialization terminal and an input terminal for controlling the initialization terminal.

REFERENCES:
patent: 4476491 (1984-10-01), Murata et al.
patent: 4559560 (1985-11-01), Murata et al.
patent: 4882614 (1989-11-01), Kageyama et al.
patent: 5053870 (1991-11-01), Ito et al.
Development of a Ghost Cancel Reference Signal for TV Broadcasting, IEEE Transactions on Broadcasting vol. 35, No. 4, Dec. 1989.
New Ghost Reduction Tuner Using a Training Method, IEEE Transaction on Consumer Electronics, vol. 36, No. 3, Aug. 1990.
Technical Report of the Institute of Television Engineers of Japan vol. 13, No. 32 pp. 1-36 (1989, 6).

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