| 摘要 |
PROBLEM TO BE SOLVED: To provide effective lossless compression of both photographic and graphics content in image and video media using predictive reversible encoding. SOLUTION: Predictive reversible encoding can operate on a macroblock basis for compatibility with existing image and video codecs. Predictive reversible encoding chooses and applies one of multiple available different pulse-code modulation (DPCM) modes to individual macro-blocks to produce DPCM residuals having a closer to optimal distribution for run-length, Golomb Rice RLGR entropy encoding. This permits effective entropy encoding despite the differing characteristics of photographic and graphics image content. COPYRIGHT: (C)2006,JPO&NCIPI |
