| 摘要 |
PROBLEM TO BE SOLVED: To freely cut an arbitrary part out of long-period contents so that audio data can be reproduced. SOLUTION: An ACC/SBR separation part 42 separates SBR data from an encoded stream. An SBR analysis part 42 analyzes the SBR data. When a frame at the cutting head (IN point) is referred to forward, an SBR reconstitution part 44 reconstitutes data of sub-bands on which the SBR data of the frame are based so that the data are not referred to forward based upon information of past frames, replaces representation of data of other sub-bands so that the data are referred to in order in a frequency direction, and changes a flag indicating a referring direction. COPYRIGHT: (C)2006,JPO&NCIPI
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