Sync detector having noise adjusted slice level

Details Sync detector having noise adjusted slice level Sync detector having noise adjusted slice level

1986-04-11

1987-11-17

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358155, H04N 508

Patent

active

047077409

ABSTRACT:
A sync detector is provided for recovering or extracting a sync signal from a video signal. The circuitry includes a slice level comparator for comparing the video signal against a slice level signal for providing a sync signal in dependence upon the comparison. The slice level signal is adjusted as a function of noise measured during a nonpicture portion of the video signal.

REFERENCES:
patent: 4185299 (1980-01-01), Harford
patent: 4357629 (1982-11-01), McGinn
"Variable Threshold Circuit Separates Sync Pulses from Composite Video Signal", Strange, Electronic Design, vol. 20-No. 21, Oct. 12, 1972, p. 100.

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