Predictive encoder with a non-linear quantizing characteristic

摘要

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.