| 摘要 |
PROBLEM TO BE SOLVED: To use lossy and lossless compression in a unified way for a single audio signal. SOLUTION: A unified lossy and lossless audio compression scheme combines lossy and lossless compression within a same audio signal. This approach employs mixed lossless coding of a transition frame between lossy and lossless coding frames to product seamless transitions. The mixed lossless coding performs a lapped transform and inverse lapped transform to produce an appropriately windowed and folded pseudo-time domain frame, which can then be losslessly coded. The mixed lossless coding also can be applied for frames that exhibit poor lossy compression performance. COPYRIGHT: (C)2004,JPO&NCIPI
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