Methods and apparatus for generating signatures
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United States of America Patent
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Jun 4, 2013
Grant Date -
Nov 6, 2008
app pub date -
Apr 28, 2008
filing date -
May 2, 2007
priority date (Note) -
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Abstract
Methods and apparatus for characterizing media are described. In one example, a method of characterizing media includes capturing a block of audio; converting at least a portion of the block of audio into a frequency domain representation; dividing the frequency domain representation into a plurality of bands; determining a characteristic difference of a first band of the plurality of bands based on a comparison of a characteristic of the first band and a characteristic of a second band different from the first band, wherein the characteristic of the first band occurs at a time that is different than a time at which the characteristic of the second band takes place; and determining a signature bit based on a characteristic difference. Other examples are shown and described.
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