Signal offset circuitry for digital deghosting system

Details Signal offset circuitry for digital deghosting system Signal offset circuitry for digital deghosting system

1986-01-31

1987-03-17

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358160, 358188, 358905, H04N 521, H04N 514

Patent

active

046512128

ABSTRACT:
A digital deghosting system uses the interval between the sixth pre-equalization pulse and the first serration as a training signal to determine the timing and amplitude of ghost signals relative to the desired signal. The system includes level shifting circuitry to change the amplitude of the video signals during the training interval. This amplitude shift ensures that all of the information concerning the ghost signals is within the dynamic range of the analog to digital converter.

REFERENCES:
patent: 4275420 (1981-06-01), Yamada et al.
patent: 4333109 (1982-06-01), Ciciora
patent: 4517586 (1985-05-01), Balaban et al.
patent: 4540974 (1985-09-01), Schanne et al.
patent: 4542408 (1985-09-01), Lewis, Jr.

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