发明名称 APPARATUS AND ALGORITHM FOR COMPRESSING AND DECOMPRESSING DATA
摘要 <p>A compression and a decompression algorithm resides in a memory of a data processing system. The data processing system communicates to another data processing system via an input/output means and a telecommunications network. When a message, to be communicated to the other data processing system, is ready for transmission, the data processing system compresses the message data. A processor or the data processing system compresses the data using the compression algorithm stored in the memory of the data processing system. The compression algorithm: identifies a mask character in the data representing the most frequently occurring character in the data, develops a mask byte in association with the mask character, the mask byte identifying the locations of the mask character in the data and identifying the locations of each portion of a residual message associated with the data, and develops the residual message, the residual message representing the message data with the mask character extracted from the message data. EN984046</p>
申请公布号 CA1252896(A) 申请公布日期 1989.04.18
申请号 CA19860506443 申请日期 1986.04.11
申请人 INTERNATIONAL BUSINESS MACHINES CORPORATION 发明人 LARSON, LAWRENCE E.
分类号 H03M7/30;(IPC1-7):H03M7/42 主分类号 H03M7/30
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