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Abstract

A machine accesses audio data that may be included in a media item, and the audio data includes multiple segments. The machine detects a silent segment among non-silent segments of the audio data. The machine generates sub-fingerprints of the non-silent segments by hashing the non-silent segments with a same fingerprinting algorithm, but the machine generates a sub-fingerprint of the silent segment based on a predetermined non-zero value that represents fingerprinted silence. With these sub-fingerprints generated, the machine generates a fingerprint of the audio data, of the media item, or of both, by storing the generated sub-fingerprints mapped to locations of their corresponding segments in the audio data. The machine then indexes the fingerprint by indexing the sub-fingerprints of the non-silent segments, without indexing the sub-fingerprint of the silent segment.

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First Claim