VOICE DECODING DEVICE, VOICE ENCODING DEVICE, VOICE DECODING METHOD, VOICE ENCODING METHOD, VOICE DECODING PROGRAM AND VOICE ENCODING PROGRAM

摘要

PROBLEM TO BE SOLVED: To correct a time envelope shape of a decoded signal and reduce perceived distortion with a little information amount.SOLUTION: A voice decoding device, which decodes an encoded voice signal and outputs a voice signal, includes: a coded sequence analyzing unit which analyzes an encoded sequence including the encoded voice signal; a voice decoding unit which receives the encoded sequence including the encoded voice signal from the coded sequence analyzing unit, and acquires the voice signal by decoding it; a time envelop shape determination unit which receives information from at least one of the coded sequence analyzing unit and the voice decoding unit, and determines the time envelope shape of the decoded voice signal on the basis of the information; and a time envelope correction unit which corrects the time envelope shape of the decoded voice signal on the basis of the time envelope shape determined at the time envelope shape determination unit and outputs it.