Ghost canceller

Details Ghost canceller Ghost canceller

1984-05-10

1986-04-15

Masinick, Michael A.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358166, 358905, H04N 5213, H04N 514

Patent

active

045831203

ABSTRACT:
A ghost canceller includes a ghost canceling circuit having a transversal filter for receiving a television input signal and a tap gain holding circuit for holding tap gains of the filter, a ghost detector, and a means for writing tap gain data into the tap gain data holding circuit in response to the ghost detector to permit a ghost component in an output signal of the ghost canceling circuit to be canceled out. In order to prevent the disturbance of a TV screen due to a transient response which occurs upon writing tap gain data into the tap gain data holding circuit, an output means is provided for permitting a signal other than the output signal of the ghost canceling circuit to be selectively taken out during a first time period including an interval in which tap gain data is written into the tap gain holding circuit and for permitting an output signal of the ghost canceling circuit to be selectively taken out during a second time period other than the first time period.

REFERENCES:
patent: 4344089 (1982-08-01), Utsunomiya et al.
Patents Abstracts of Japan, vol. 5, No. 133 (E-71) [805], 25th Aug. 1981; & JP-A-56 69 973 (Tokyo Shibaura Denki K.K.).

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