发明名称 LZW DATA COMPRESSION APPARATUS AND METHOD USING LOOK-AHEAD MATHEMATICAL RUN PROCESSING
摘要 The disclosed data compressor compresses an input stream of data characters using LZW data compression. When the occurence of a run of input data characters is detected, the run is processed by successively looking ahead into the input to determine the contiguous numerically increasing segments that exist in the run and by utilizing codes from the compressor code counte r to correspond to the contiguous numerically increasing run segments. Alternatively, the detected run is processed by determining the length of th e run and mathematically determining, from the length of the run, the respecti ve codes from the code counter corresponding to the contiguous numerically increasing segments that exist in the run. Specifically, an iterative mathematical algorithm or a quadratic equation algorithm are utilized to process the run.
申请公布号 CA2381381(A1) 申请公布日期 2001.02.22
申请号 CA20002381381 申请日期 2000.08.11
申请人 UNISYS CORPORATION 发明人 COOPER, ALBERT B.
分类号 H03M7/42;G06T9/00;H03M7/30;H03M7/46;(IPC1-7):H03M7/30 主分类号 H03M7/42
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