SOUND PACKET TRANSMITTING METHOD, SOUND PACKET TRANSMITTING APPARATUS, SOUND PACKET TRANSMITTING PROGRAM, AND RECORDING MEDIUM IN WHICH THAT PROGRAM HAS BEEN RECORDED

摘要

An encoding part (11) encodes an input sound; a decoding part (12) decodes the encoded sound; a complementing sound creating part (20) uses a previous decoded signal to create a complementing sound that complements the sound of a current frame; a sound quality determining part (40) uses the input sound and the complementing sound to evaluate the sound quality of the complementing sound, and produces a duplication level whose value becomes larger stepwise with the decreasing value of the sound quality evaluation; a packet producing part (15) produces, for the encoded sound, packets the number of which is the same as the number designated by the duplication level; and the produced packets are transmitted. In this way, the possibility of occurrence of packet loss at the receiving end can be reduced.