ENCODING METHOD AND APPARATUS FOR SUPPORTING SCALABILITY FOR THE EXTENSION OF AUDIO DATA, DECODING METHOD AND APPARATUS THEREOF

摘要

An encoding method for supporting scalability for the extension of audio data, an apparatus therefor, a decoding method therefor, and an apparatus therefor are provided to reinforce the scalability of audio data and offer backward compatibility capable of supporting an existing BSAC(Bit Sliced Arithmetic Coding) method. The first to the Nth BASC units(62-65) encode audio data and extension data of the audio data. A bit stream processing/transmitting unit(35) groups payloads which are results encoded by the first to the Nth BASC units(62-65) and interleaves the grouped payloads. The bit stream processing/transmitting unit(35) clears a partial group among the interleaved payloads and transmits the other groups.