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Information search method and apparatus of time-series data using multi-dimensional time-series feature vector and program storage medium

  • US 7,490,107 B2
  • Filed: 05/18/2001
  • Issued: 02/10/2009
  • Est. Priority Date: 05/19/2000
  • Status: Active Grant
First Claim
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1. An information search system comprising:

  • a terminal of an information provider having a processor;

    a terminal of a user having a processor; and

    an information search server having a processor, the processor of the information search server comprising;

    an information accumulation section which accumulates in advance accompanying information related to reference time-series data;

    a time-series signal feature accumulation section which accumulates in advance reference time-series signal feature data, said reference time-series signal feature data being associated with respective accompanying information related to the reference time-series data;

    a search key input section configured to receive a piece of search key time-series data from said terminal of said user as a search key;

    a feature calculation section configured to generate search key time-series signal feature data in a form of a multi-dimensional feature vector based on said piece of said search key time-series data, wherein each element of said multi-dimensional feature vector represents an average value of a corresponding one of a plurality of portions which are obtained by dividing said piece of search key time-series data into the plurality of portions;

    a feature collating section configured to perform collation between said search key time-series signal feature data and said reference time-series signal feature data to determine a similar portion in said reference time-series signal feature data, and searches out collating reference time-series signal feature data which includes the similar portion;

    a search information selection section configured to select, from said information accumulation section, accompanying information based upon the collating reference time-series signal feature data;

    an information presentation section configured to output, as a search result, said accompanying information which is selected by said search information selection section; and

    an information update section which, when reference time-series signal feature data, which has been obtained by feature calculation of reference time-series data, and accompanying information related to said reference time-series signal feature data have been received from the terminal of the information provider, performs addition to the reference time-series signal feature data which is accumulated in said time-series signal feature accumulation section and the accompanying information which is accumulated in said information accumulation section, according to said received reference time-series signal feature data and accompanying information, and which, when a signal for commanding the deletion of reference time-series signal feature data and accompanying information, and data for specifying the reference time-series signal feature data and the accompanying information which are to be deleted have been received from said terminal of said information provider, performs deletion of said reference time-series signal feature data and said accompanying information which are to be deleted from said time-series signal feature accumulation section and said information accumulation section, respectively,wherein the processor of said information search server performs updating of said accompanying information which is presented to said user.

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