Data retrieval device using a skip table
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United States of America Patent
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Aug 14, 2012
Grant Date -
Apr 28, 2011
app pub date -
Jan 14, 2010
filing date -
Jan 23, 2009
priority date (Note) -
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Abstract
The data retrieval device includes a first skip correspondence table which corresponds to each piece of data in a retrieval target data series, and, for each possible similarity range which is taken by a similarity between corresponding data and retrieval data, records skip destination data information for specifying the data which appears first after the corresponding data among pieces of data in which similarities with the retrieval data have the possibility to have a predetermined relationship in comparison with a predetermined threshold. The data retrieval device also includes a control unit which, when retrieving data in which a similarity with the retrieval data is smaller than or equal to the threshold from among the retrieval target data series, selects data in the retrieval target data series for which calculation of a similarity with the retrieval data is necessary, using the first skip correspondence table.
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