AUDIO SIGNAL ENCODING METHOD AND AUDIO SIGNAL DECODING METHOD

摘要

PROBLEM TO BE SOLVED: To provide an audio signal encoding method and an audio signal decoding method for adaptively performing scalable coding so that sufficient performance can be presented when encoding various kinds of audio signals. SOLUTION: Adaptive scalable coding is performed for changing the frequency range of encoding by automatically deciding the character/distribution of source audio signals without performing fixed scalable coding.