Patent ID: 7069223
Filing Date: 2006-06-27
Classification: G10L

Abstract:
1. An audio decoding device for decoding N A (where N A >1) channels of audio signals by a sub-band synthesis operation using sub-band synthesis filter data and sub-band signal data, the device comprising: a first memory section for storing M a second memory section for storing at least some of N an operation section for receiving encoded audio data and decoding the encoded audio data into sub-band signal data, performing a sub-band synthesis filter operation using the data stored in the first memory section so as to output M a data transfer section for, based on the request from the operation section, switching, by M the first memory section comprises, in addition to the first memory area and the second memory area, a third memory area for storing data not limited to use with the sub-band synthesis operation; and the operation section comprises a sub-band signal transfer section for, when a number of channels of input encoded audio data is three or greater, copying or transferring at least some of the sub-band signals for a particular channel stored in the first memory section to a particular area in the first memory section.