TECHNICAL INNOVATION IN PURE LOSSLESS AUDIO SPEECH COMPRESSION

摘要

PROBLEM TO BE SOLVED: To use lossy and lossless compression in a unified way for a single audio signal.;SOLUTION: A lossless audio compression scheme is adapted for use in a unified lossy and lossless audio compression scheme. In the lossless compression, the adaptation rate of an adaptive filter is varied based on transient detection, such as increasing the adaptation rate where a transient is detected. A multi-channel lossless compression uses an adaptive filter that processes samples from multiple channels in predictive coding a current sample in a current channel. The lossless compression also encodes using an adaptive filter and Golomb coding with non-power of two divisor.;COPYRIGHT: (C)2004,JPO&NCIPI