FIELD: information technology.
SUBSTANCE: when a frame immediately preceding a target encoding 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 target encoding frame can be encoded according to the linear predictive coding scheme by initialising the internal state of the first encoding unit. Consequently, 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.
7 cl, 5 dwg
