Comparison of data signals using characteristic electronic thumbprints
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United States of America Patent
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Sep 2, 2008
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app pub date -
Apr 24, 2002
filing date -
Apr 24, 2001
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Abstract
A characteristic thumbprint is extracted from a data signal, the thumbprint based on statistics relating to the data signal. The data signal can be compared indirectly by matching this thumbprint against one or more reference thumbprints. The data signal may be any type of signal, including streaming digitized audio or obtained from static files. A database for containing a number of such thumbprints and methods for searching the database are also described.
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