SYSTEM AND METHOD FOR CODING/DECODING VOICE PACKET IN REAL TIME

摘要

PURPOSE: A system and a method for coding/decoding a voice packet in real time are provided to improve the coding speed of the voice packet by extracting a specific component from the voice packet. CONSTITUTION: A vocoder(110) compresses a voice signal to output it as a voice packet. A formant extractor(120) separates a formant component and a residual component from voice packet components outputted from the vocoder(110). A substitution table generator(140) generates a substitution table used for coding the formant component. A coding unit(130) codes the formant component by using the substitution table. A packet coupling unit(150) couples the coded formant component to the residual component of the voice packet transmitted from the formant extractor(120).