Ghost canceller

Details Ghost canceller Ghost canceller

1990-12-04

1992-03-24

Kostak, Victor R.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358905, 358 36, H04N 5213, H04N 5205

Patent

active

050993283

ABSTRACT:
A ghost canceller includes a ghost cancelling circuit, waveform memories, a CPU, a training signal generating circuit, and a ghost variation detection circuit. By taking in GCR signals from the waveform memories into the CPU, synchronous addition and field sequence processing are effected, and they are transferred to the training signal generating circuit. The input video signal is changed over to the training signal to cancel ghosts, and when ghost variations are is not detected by the ghost variation detection circuit, the input video signal is fed into the ghost cancelling circuit, and is delivered as an output video signal.

REFERENCES:
patent: 4303895 (1981-12-01), Ohnishi
patent: 4502077 (1985-02-01), Morotomi
patent: 4575857 (1986-03-01), Murakami
Ghost Canceller with GCR Signal, ITEJ Techincal Report ROFT 89-6, pp. 31-36, Jun. 1989.
Development of Ghost Reduction Tuner, ITEJ Technical Report vol. 13, No. 53, pp. 1-6, Oct. 1989, NEC HomeElectronics, Ltd. Reiichi Kobayashi et al.
Ghost Clean System, ITEJ Technical Report, vol. 13, No. 53, pp. 7-12, Oct. 1989, Iga Hiroyuki et al., Toshiba Corporation, Toshiba Audio Video Engineering Corp.
ITEJ (The Institute of Television Engineers of Japan) Technical Report RE80-6, pp. 9-14, Feb. 1980.

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