METHOD AND APPARATUS FOR ENCODING AND DECODING EXTENSION DATA FOR SURROUND

摘要

A method and an apparatus for encoding and decoding surround expansion data are provided to encode or decode additional information, capable of up-mixing an audio signal as a surround signal, as the expansion data. An audio data decoding unit(705) decodes audio data hierarchically encoded. A termination code detecting unit(720) detects an identification code indicating that a payload of the audio data is terminated. A start code detecting unit(725) detects an identification code indicating that the payload of expansion data is started. An expansion type detecting unit(730) detects a type of the expansion data. A judging unit judges whether or not the detected type indicates additional information for decoding the audio data by a surround type. If the detected type indicates the additional information, an expansion data decoding unit(735) decodes expansion data corresponding to the additional information.