Video ghost signal cancelling circuit having variable delay line

Details Video ghost signal cancelling circuit having variable delay line Video ghost signal cancelling circuit having variable delay line

1988-11-23

1990-08-28

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358905, H04N 5213

Patent

active

049530267

ABSTRACT:
A video ghost signal canceling circuit which has an adding means for adding a ghost canceling signal to a digital video signal thereby canceling ghost components of the video signal, and a ghost canceling signal generation means for generating a ghost canceling signal in accordance with an output of the adding means. The ghost canceling signal generation means of the present invention comprises a variable delay filter means composed by a parallel arrangement of a plurality of variable delay lines a delay amount of which is controllable from the outside, and a plurality of transversal filters with a coefficient which is controllable, wherein each transversal filter is connected in series to corresponding variable delay line, and the adding means for adding all outputs of the variable delay filter means and for outputting a ghost canceling signal.

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patent: 4698680 (1987-10-01), Lewis, Jr., et al.
patent: 4727424 (1988-02-01), Chao

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