Methods and apparatus for generating signatures
First Claim
1. A method of characterizing media comprising:
- converting at least a portion of a 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 first characteristic of the first band and a second characteristic of a second band different from the first band, wherein the first characteristic of the first band occurs at a time that is different than a time at which the second characteristic of the second band takes place, and wherein the characteristic difference is determined differently based on whether a count value associated with the first band has a first property; and
determining a signature bit based on the characteristic difference.
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Accused Products
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.
119 Citations
31 Claims
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1. A method of characterizing media comprising:
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converting at least a portion of a 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 first characteristic of the first band and a second characteristic of a second band different from the first band, wherein the first characteristic of the first band occurs at a time that is different than a time at which the second characteristic of the second band takes place, and wherein the characteristic difference is determined differently based on whether a count value associated with the first band has a first property; and determining a signature bit based on the characteristic difference. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A signature generation system comprising:
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a transformer to convert at least a portion of a block of audio into a frequency domain representation; a divider to divide the frequency domain representation into a plurality of bands; a characteristic determiner to determine a first characteristic of a first band of the plurality of bands and a second characteristic of a second band different from the first band, wherein the first characteristic of the first band occurs at a time that is different than a time at which the second characteristic of the second band takes place; a subtractor to determine a characteristic difference between the first characteristic and the second characteristic, wherein the characteristic difference is determined differently based on whether a count value associated with the first band has a first property; and a signature determiner to determine a signature bit based on the characteristic difference. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A tangible machine readable medium comprising instructions that, when executed, cause a machine to at least:
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convert at least a portion of a block of audio into a frequency domain representation; divide the frequency domain representation into a plurality of bands; determine a characteristic difference of a first band of the plurality of bands based on a comparison of a first characteristic of the first band and a second characteristic of a second band different from the first band, wherein the first characteristic of the first band occurs at a time that is different than a time at which the second characteristic of the second band takes place, and wherein the characteristic difference is determined differently based on whether a count value associated with the first band has a first property; and determine a signature bit based on the characteristic difference. - View Dependent Claims (28, 29, 30, 31)
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Specification