Cluster-based data compression system and method
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United States of America Patent
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Aug 8, 2000
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app pub date -
Dec 31, 1998
filing date -
Dec 31, 1998
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Abstract
The present invention is embodied in a method and system for compressing data using clustering techniques. The invention provides compression of a data ensemble composed of individual data sets. Each individual data set has associated data set context and history contexts. The present invention groups similar data set contexts and history contexts together so as to achieve a reduced total encoding cost. This total cost is minimized by selecting the clustering of the data set and history contexts such that the models or codebooks used to compress tokens are shared between tokens assigned to the same context clusters. Using clustering techniques, the present invention alternately varies the data set context clustering and history context clustering until a minimum total cost is achieved.
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