| 摘要 |
PROBLEM TO BE SOLVED: To provide an inexpensive audio decoder capable of down mixing by reducing a memory capacity required for a series of decode processing. SOLUTION: Inverse quantization processing for each channel and frequency base/time base conversion processing for each channel are performed through pipeline processing by using a work buffer 3 and then when the pipeline processing is conducted by a DMUX (inverse quantizing means) 1 and an IMDCT (frequency base/time base converting means) 2, the one work buffer 3 can be used in common and the same buffer region in the work buffer 3 can repeatedly be used, thereby reducing the memory capacity of the buffer memory needed for a series of decoding processing nearly without spoiling sound quality. COPYRIGHT: (C)2006,JPO&NCIPI
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