Predictive encoder with a non-linear quantizing characteristic

Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry

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179 1555R, 358 13, H04N 540, H04N 940

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active

041797108

ABSTRACT:
A predictive encoder is disclosed which has a non-linear quantizing characteristic. The transmission gain of the quantizer is less than unity when the amplitude component of the predictive error signal is smaller than a predetermined level and is substantially equal to unity when the amplitude component of the predictive error signal is higher than the predetermined level. As a result, undesired redundancy components are effectively suppressed without causing an increase in quantizing noise and a deterioration in information quality.

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Analog Devices Inc: A/D Conversion Handbook, Norwood, MA., Jun. 1972, pp. I-64/65.

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