Ghost cancelling system

Details Ghost cancelling system Ghost cancelling system

1981-01-05

1982-08-10

Murray, Richard

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358166, 358905, H04N 521

Patent

active

043440894

ABSTRACT:
A ghost cancelling system for eliminating a ghost by using a ghost cancelling signal formed from an input video signal including the ghost and adding the ghost cancelling signal to the input video signal. In this ghost cancelling system, the divergence of the ghost cancelling circuit is avoided during the transient time of the channel selection or during the ghost cancelling process, and when there is the possibility that the ghost cancelling circuit diverges, the circuit is firstly made operable as a feed-forward type circuit for a predetermined period and thereafter made operable as a feedback type circuit.

REFERENCES:
patent: 4044381 (1977-08-01), Shimano et al.
patent: 4127874 (1978-11-01), Iwasawa et al.

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