Ghost canceling apparatus

Details Ghost canceling apparatus Ghost canceling apparatus

1981-10-29

1985-02-26

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 36, 358905, H04N 521, H04B 304

Patent

active

045020779

ABSTRACT:
A ghost canceling apparatus for effectively canceling ghosts in television signals and having a high capability for canceling ghosts in the frequency band in which the ghost canceling is required. The apparatus utilizes an error detector and a tap gain control in a closed loop to control the gain of a transversal filter. In addition, a frequency transfer characteristic modifier is utilized to modify the loop frequency transfer characteristics so as to optimize the cancelation of ghosts.

REFERENCES:
patent: 3320361 (1967-05-01), Stroh
patent: 4303895 (1981-12-01), Ohnishi
patent: 4389623 (1983-06-01), Onishi
Ciciora, "A Tutorial on Ghost Cancelling in Television Systems", IEEE Transactions on Consumer Electronics, vol. CE-25, Feb. 1979, pp. 9-43.
Murakami et al., "A Digitalized Automatic Ghost Canceller", IEEE Transactions on Consumer Electronics, vol. CE-25, Aug. 1979, pp. 555-561.

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