Television deghosting apparatus using pseudorandom sequence dete

Details Television deghosting apparatus using pseudorandom sequence dete Television deghosting apparatus using pseudorandom sequence dete

1992-04-16

1994-01-18

Kostak, Victor R.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358905, H04N 521

Patent

active

052803554

ABSTRACT:
Apparatus for detecting the presence of a pseudorandom number (PRN) sequence used in a television receiver for reducing multipath interference such as image ghosts includes a multiplier responsive to a video signal containing the PRN sequence test signal component, and to a delayed version of such video signal. The amount of the delay is related to the duration of a PRN sequence, and one of the multiplier inputs is substantially devoid of average and DC components. A multiplier output representing correlation of the input signals indicates the presence of the test signal component, which is then passed to a network for processing to develop coefficients for a deghosting filter.

REFERENCES:
patent: 4542408 (1985-09-01), Lewis, Jr.
patent: 4980767 (1990-12-01), Chao et al.
patent: 5060067 (1991-10-01), Lee et al.
patent: 5065242 (1991-11-01), Dieterich et al.

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