Ghost canceling circuit promptly responsive to channel change

Details Ghost canceling circuit promptly responsive to channel change Ghost canceling circuit promptly responsive to channel change

1994-01-21

1994-09-06

Groody, James J.

Television

Image signal processing circuitry specific to television

Noise or undesired signal reduction

348725, H04N 5213

Patent

active

053452747

ABSTRACT:
Digital ghost eliminating filters incorporated in a ghost canceling circuit are responsive to weighted coefficients for canceling ghost components of a digital video signal assigned to a selected channel for a clear video image, and has an auxiliary receiving circuit sequentially tuned in other channels so as to previously produce sets of weighted coefficients for non-selected channels, thereby immediately supplying one of the sets of weighted coefficients to the digital ghost eliminating filters when a main receiving circuit is tuned in another channel.

REFERENCES:
patent: 4897725 (1990-01-01), Tanaka et al.
patent: 4947252 (1990-08-01), Kobayashi et al.
patent: 4953026 (1990-08-01), Kobayashi et al.
Matsuura, Shigeo; Miyazawa, Hiroshi; Takayama, Susumo; Usui, Masao; Kobayashi, Relichi; and Iga, Hiroyuki. "Development of a Ghost Cancel Technology for TV Broadcasting", NAB: Engineering Conference Proceedings. pp. 229-238 (1990).

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