Data transition enhancement
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United States of America Patent
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-
Aug 28, 1984
Grant Date -
N/A
app pub date -
Dec 7, 1981
filing date -
Dec 7, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A data enhancement circuit for a facsimile receiver is provided. The circuit includes positive and negative slope detectors as well as a signal threshold detector. Incoming signals above the signal threshold and having a positive slope are considered black. Incoming signals above the signal threshold but with a negative slope are considered white. Incoming signals below the threshold are always considered white. Incoming signals above the signal threshold and with a negative slope having a slope magnitude less than a predetermined slope magnitude are considered gray. The circuit of the present invention reacts to high speed data and provides enhancement for images in a gray scale.
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