DIGITALER SPRACHDEKODIERER UNTER VERWENDUNG EINER NACHFILTERUNG MIT EINER REDUZIERTEN SPEKTRALVERZERRUNG

摘要

An adaptive spectral postfilter (108) in a synthesized speech platform has a denominator characteristic that corresponds to a preceding LPC filter stage (106) and a numerator characteristic that is developed as a function of the denominator characteristic through application of spectral smoothing techniques. This allows the numerator to track the denominator without the introduction of spectral distortion that would otherwise affect the processing in an adverse way.