Acoustic parameters encoding, decoding method, apparatus and program, acoustic signal encoding, decoding method, apparatus and program, acoustic signal transmitting apparatus, acoustic signal receiving apparatus

摘要

PROBLEM TO BE SOLVED: To realize vector encoding/decoding having low quality degradation of LSP parameters in a silence interval or a steady state noise interval. SOLUTION: While conducting vector encoding/decoding of LSP parameters of moving average type voice, a vector of the spectrum equivalent to a steady noise interval or a vector from which beforehand obtained average value vector of a voice interval is subtracted, is stored as one vector C0 of a vector coding table 14A and a spectrum equivalent to a silence interval or a steady noise is outputted as one of the coded vectors.