SPEECH QUALITY OBJECT ESTIMATE DEVICE

摘要

PROBLEM TO BE SOLVED: To improve the speech quality estimate accuracy by integrating a section to identify a coding system of a voice signal so as to select a standard deteriorating voice signal and a weight coefficient in matching with the coding system of a test voice signal. SOLUTION: A coding voice identification section 1 identifies a coding system of a coding voice signal having a code error. A similarity calculation section 3 obtains a time series of the similarity between the analysis result by a voice analysis section 2 and a standard deterioration voice signal selected based on the identification result by the coding voice identification section 1. A weight coefficient database 6 stores weight coefficients between units obtained by subject evaluation values of various deteriorated voice signals and learning processing by a neural net by the similarity time series. A quality estimate calculation section 4 applies input processing to the weight coefficient selected based on the time series of the similarity obtained by the similarity calculation section 3 and the identification result of the coded voice identification section 1 from the weight coefficient database 6 and estimates the speech quality.