Apparatus and method for improving the compressibility of an enh

Details Apparatus and method for improving the compressibility of an enh Apparatus and method for improving the compressibility of an enh

1987-07-24

1989-09-19

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358464, 382 54, H04N 140, G06K 940

Patent

active

048686700

ABSTRACT:
Apparatus and an accompanying method are disclosed herein for improving the compressibility of an enhanced digital video signal, illustratively comprised of a serial bit stream, such as that generated by scanning a video image produced, for example, by a microfilm scanner. Specifically, whenever a video transition occurs in the a stream of incoming pixels, this apparatus momentarily varies a threshold level, in an appropriate direction, during the transition in order to reduce the noise content in threshold pixel values and thereby enhance the compressibility of these pixels.

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