Method and system for updating audio fingerprint retrieval database

Abstract

The invention relates to a method and system for updating an audio fingerprint search library. The method comprises the following steps of: storing audio fingerprints and retrieval indexes of all old songs in a basic search library; updating audio fingerprints and retrieval indexes of new songs in an incremental search library; judging whether the volume of the incremental search library is more than or equal to a preset threshold, if so, combining the incremental search library with the basic search library and generating a new basic search library, and updating the audio fingerprints and the retrieval indexes of the new songs in a new incremental search library; and, if not, updating the audio fingerprints and the retrieval indexes of the new songs in the incremental search library. According to the method and system disclosed by the invention, aiming at the condition that new songs are frequently added, when the incremental search library is very small and the cost for updating theincremental search library is very low, the incremental search library is only updated at each time, therefore, the time for updating the audio fingerprint search library is saved; and the audio fingerprint search library can be updated rapidly.

Description

technical field [0001] The invention relates to the technical field of audio fingerprint retrieval, in particular to a method and system for updating an audio fingerprint retrieval database. Background technique [0002] At present, users often encounter such a situation. When hearing a very nice song but because they do not know the name of the song, they cannot obtain the song through various channels (such as downloading from the Internet or buying it in a video store). . [0003] To help find the song title of a certain song, a kind of audio fingerprint retrieval library technology has appeared in the industry to solve this problem. In simple terms, the basic principle of this audio fingerprint retrieval library technology is: first record for a period of time (usually several second) want to know the sound of the song title, and then convert the recorded sound into an audio fingerprint. This audio fingerprint can be a series of digital features extracted from the sound...

AI Technical Summary

Problems solved by technology

[0004] However, the biggest problem currently facing this audio fingerprint retrieval library technology is its update problem. In order to ensure the subsequent rapid retrieval of audio fingerprints, when new tracks are added to the music library, the new music library will be converted into audio fingerprints. This audio fingerprint cannot simply be attached to the existing audio fingerprint retrieval library, but must be regenerated to facilitate the retrieval of a new audio fingerprint retrieval library. However, for an audio fingerprint retrieval library that already has millions of songs As far as the library is concerned, its update time will be quite long, so it is impossible to update it timely and quickly every day

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