Method and device for generating fingerprints of information signals
AssigneeTeletrax B.V.
InventorsJungong Han, Gerrit Comelis Langelaar
Life of this patent
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Abstract
Method and system for generating a fingerprint representing a portion of an information signal. The method comprises decomposing a portion of the information signal into plural frequency sub bands at a decomposition level, calculating a spectral property of the signal in each of said plural frequency sub bands, comparing each spectral property against a first criterion thereby generating a comparison result, combining each comparison result for constituting the fingerprint, at least once repeating the decomposing, calculating, comparing and combining, wherein for each repetition the decomposing is performed using a decomposition level different from a previous decomposition level.
Claims14
A method of generating a fingerprint representing an information signal, the method comprising the steps of:
- decomposing a portion of the information signal into plural frequency sub bands at a decomposition level;
- calculating a spectral property of the portion for each of the plural frequency sub bands;
- comparing each spectral property against a criterion, thereby generating a comparison result;
- and
- combining each comparison result for constituting the fingerprint;
- pharacterised by at least once repeating the decomposing, calculating, comparing and combining, wherein
- for each repetition the decomposing is performed using a decomposition level different from a previous decomposition level.
A device for generating a fingerprint representing an information signal, comprising:
- decomposition means for decomposing the portion of the information signal into plural frequency sub bands at a decomposition level;
- calculation means for calculating a spectral property of the portion for each of the plural frequency sub bands;
- comparison means for comparing each spectral property against a criterion;
- combining means for combining each comparison result for constituting the fingerprint;
- and
- repetition means arranged for at least once repeating the decomposing, calculating, comparing and combining respectively;
- wherein the decomposition means is arranged for performing the decomposing using a decomposition level different from a previous decomposition level.
Dependencies are inferred from the claim text.