Speech analysis system.

摘要

Speech analysis system in which segments of digitized speech are transformed into amplitude spectrums. For the voicedlunvoiced decision use is made of the peak value or spectral intensity in each amplitude spectrum. Basically a voiced decision is made when the spectral intensity increases monotonically over several segments by more than a given factor. An unvoiced decision is made if the spectral intensity drops below a given fraction of the maximum spectral intensity in the current voiced period. Refinements in the decisions are made by the use of fixed and adaptive thresholds.

Used in vocoders.