AUDIO SIGNAL ENCODING METHOD, AUDIO SIGNAL DECODING METHOD, ENCODING DEVICE, DECODING DEVICE, AUDIO SIGNAL PROCESSING SYSTEM, AUDIO SIGNAL ENCODING PROGRAM AND AUDIO SIGNAL DECODING PROGRAM

摘要

FIELD: information technology.SUBSTANCE: when a frame immediately preceding an encoding target frame to be encoded by a first encoding unit operating according to a linear predictive coding scheme is encoded by a second encoding unit operating according to a coding scheme different from the linear predictive coding scheme, the encoding target frame can be encoded according to the linear predictive coding scheme by initialising the internal state of the first encoding unit. Therefore, encoding processing performed according to a plurality of coding schemes including the linear predictive coding scheme and a coding scheme different from the linear predictive coding scheme can be realised.EFFECT: improved speech quality.9 cl, 5 dwg