| 摘要 |
A pattern-search based method and apparatus for context-adaptive variable length coding/decoding (CAVLC/CAVLD) is provided. The method analyzes the correlation between bit patterns and blocks. Before CAVLD, a step of bit-stream pattern search is conducted. If a pattern is matched in a look-up table, this invention skips the CAVLD procedure and reconstructs a block directly. Before CAVLC, a step of zig-zag ordered coefficients search is conducted. If a sequence of zig-zag ordered coefficients is matched in a look-up table, a corresponding coded bit-stream can be obtained directly. Compared with the standard CAVLD procedures, this invention improves about 10% performance in memory access speed.
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