Signal quality monitoring system

Details Signal quality monitoring system Signal quality monitoring system

1991-05-08

1993-06-22

Boudreau, Leo H.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

382 43, H04N 1700, G06K 900

Patent

active

052219674

ABSTRACT:
A cable television signal for example may be monitored and impairments determined and in many cases classified by grabbing at least portion of a transmitted frame of video information somewhere on the network to provide a video signal, performing a two dimensional Fourier transform on the video signal and analyzing the Fourier transform so obtained to determine the location of areas indicating above average occurrence of specific frequencies to provide an indication of an impairment.

REFERENCES:
patent: 4351062 (1982-09-01), Yoshiya
patent: 4558358 (1985-12-01), Onda
patent: 4630228 (1986-12-01), Tarczy-Hornoch et al.
patent: 4633411 (1986-12-01), Bliss et al.
patent: 4843631 (1989-06-01), Steinpichler et al.
patent: 4901147 (1990-02-01), Tajima
patent: 5047724 (1991-09-01), Boksiner et al.
patent: 5073822 (1991-12-01), Gumm et al.

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