Method and device for producing a fingerprint and method and method and device for identifying an audio signal
First Claim
1. A method for producing a fingerprint of an audio signal using information defining a plurality of predetermined fingerprint modi, all of the fingerprint modi relating to the same type of fingerprint, the fingerprint modi, however, providing different fingerprints differing from each other with regard to their data volume, on the one hand, and to their characterizing strength for characterizing the audio signal, on the other hand, the fingerprint modi being predetermined such that a fingerprint in accordance with a fingerprint modus having a first characterizing strength is convertible to a fingerprint in accordance with a fingerprint modus having a second characterizing strength, without using the audio signal, the method comprising:
- setting a predetermined fingerprint modus of the plurality of predetermined fingerprint modi; and
computing, a fingerprint in accordance with the set predetermined fingerprint modus.
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Accused Products
Abstract
For producing a fingerprint of an audio signal, use is made of information defining a plurality of predetermined fingerprint modi, all of the fingerprint modi relating to the same type of fingerprint, the fingerprint modi, however, providing different fingerprints differing from each other with regard to their data volume, on the one hand, and to their characterizing strength for characterizing the audio signal, on the other hand, the fingerprint modi being predetermined such that a fingerprint in accordance with a fingerprint modus having a first characterizing strength is convertible to a fingerprint in accordance with a fingerprint modus having a second characterizing strength, without using the audio signal. A predetermined fingerprint modus of the plurality of predetermined fingerprint modi is set and subsequently used for computing a fingerprint using the audio signal. The convertibility feature of the fingerprints having been produced by the different fingerprint modi enables setting a flexible compromise between the data volume and the characterizing strength for certain applications without having to re-generate a fingerprint database with each change of the fingerprint modus. Fingerprint representations scaled with regard to time or frequency may readily be converted to a different fingerprint modus.
59 Citations
18 Claims
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1. A method for producing a fingerprint of an audio signal using information defining a plurality of predetermined fingerprint modi, all of the fingerprint modi relating to the same type of fingerprint, the fingerprint modi, however, providing different fingerprints differing from each other with regard to their data volume, on the one hand, and to their characterizing strength for characterizing the audio signal, on the other hand, the fingerprint modi being predetermined such that a fingerprint in accordance with a fingerprint modus having a first characterizing strength is convertible to a fingerprint in accordance with a fingerprint modus having a second characterizing strength, without using the audio signal, the method comprising:
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setting a predetermined fingerprint modus of the plurality of predetermined fingerprint modi; and
computing, a fingerprint in accordance with the set predetermined fingerprint modus. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of characterizing an audio signal, comprising:
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producing a fingerprint of the audio signal using information defining a plurality of predetermined fingerprint modi, all of the fingerprint modi relating to the same type of fingerprint, the fingerprint modi, however, providing different fingerprints differing from each other with regard to their data volume, on the one hand, and to their characterizing strength for characterizing the audio signal, on the other hand, the fingerprint modi being predetermined such that a fingerprint in accordance with a fingerprint modus having a first characterizing strength is convertible to a fingerprint in accordance with a fingerprint modus having a second characterizing strength, without using the audio signal, the method comprising;
setting a predetermined fingerprint modus of the plurality of predetermined fingerprint modi; and
computing a fingerprint in accordance with the set predetermined fingerprint modus;
comparing the computed fingerprint with a plurality of stored fingerprints representing known audio signals to characterize the audio signal, the stored fingerprints having been produced in accordance with one of the plurality of fingerprint modi, the step of comparing comprising;
examining whether the search fingerprint and the database fingerprint have been produced in accordance with different fingerprint modi;
converting the search fingerprint and/or the database fingerprint so that the fingerprints to be compared exist in accordance with the same fingerprint modus; and
performing the comparison using the fingerprints existing in the same fingerprint modus. - View Dependent Claims (12, 13, 14)
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- 15. A fingerprint representation for an audio signal, with a fingerprint, the fingerprint being configured in accordance with one of a plurality of predetermined fingerprint modi, all of the fingerprint modi relating to the same type of fingerprint, the fingerprint modi, however, providing different fingerprints differing from each other with regard to their data volume, on the one hand, and to their characterizing strength for characterizing the audio signal, on the other hand, the fingerprint modi being predetermined such that a fingerprint in accordance with a fingerprint modus having a first characterizing strength is convertible to a fingerprint in accordance with a fingerprint modus having a second characterizing strength, without using the audio signal.
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17. An apparatus for producing a fingerprint of an audio signal using information defining a plurality of predetermined fingerprint modi, all of the fingerprint modi relating to the same type of fingerprint, the fingerprint modi, however, providing different fingerprints differing from each other with regard to their data volume, on the one hand, and to their characterizing strength for characterizing the audio signal, on the other hand, the fingerprint modi being predetermined such that a fingerprint in accordance with a fingerprint modus having a first characterizing strength is convertible to a fingerprint in accordance with a fingerprint modus having a second characterizing strength, without using the audio signal, the apparatus comprising:
means for setting a predetermined fingerprint modus of the plurality of predetermined fingerprint modi; and
means for computing a fingerprint in accordance with the set predetermined fingerprint modus.
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18. An apparatus for characterizing an audio signal, comprising:
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means for producing a search fingerprint of the audio signal using information defining a plurality of predetermined fingerprint modi, all of the fingerprint modi relating to the same type of fingerprint, the fingerprint modi, however, providing different fingerprints differing from each other with regard to their data volume, on the one hand, and to their characterizing strength for characterizing the audio signal, on the other hand, the fingerprint modi being predetermined such that a fingerprint in accordance with a fingerprint modus having a first characterizing strength is convertible to a fingerprint in accordance with a fingerprint modus having a second characterizing strength, without using the audio signal, the means comprising;
means for setting a predetermined fingerprint modus of the plurality of predetermined fingerprint modi; and
means for computing a fingerprint in accordance with the set predetermined fingerprint modus;
means for comparing the computed fingerprint with a plurality of stored fingerprints representing known audio signals to characterize the audio signal, the stored fingerprints having been produced in accordance with one of the plurality of fingerprint modi, the means comprising;
means for examining whether the search fingerprint and the database fingerprint have been produced in accordance with different fingerprint modi;
means for converting the search fingerprint and/or the database fingerprint so that the fingerprints to be compared exist in accordance with the same fingerprint modus; and
means for performing the comparison using the fingerprints existing in the same fingerprint modus.
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Specification