Long time structure vocal print-based multi-layer filtering audio frequency search method and device

Abstract

The embodiment of the invention discloses a sample-based audio frequency search method, namely, a long time structure vocal print-based multi-layer filtering audio frequency search method, which can search for the complete information of the entire audio frequency through a recorded audio frequency clip. The invention discloses a novel method for generating a vocal print having long time structure information and search effect is enhanced by a two-layer filtering method. The method comprises the following steps of: extracting the vocal print characteristic of an input clip; processing by using a first layer filter; calculating result reliability; determining whether second filtering is performed or not; and realizing secondary filtering by inquiring vocal print expansion. The invention also discloses a long time structure vocal print-based multi-layer filtering audio frequency search device. Experiments indicate that the accuracy of up to 99.7 percent can be reached for an audio frequency library containing 10,000 songs when an inquired clip lasts for 5 seconds and the signal-to-noise ratio is 0 db by the embodiment of the invention.

Description

technical field [0001] The invention belongs to the field of computer technology applications, and in particular relates to a method and device for querying an audio database, in particular to a content-based sample audio retrieval method, that is, to search for the complete information of the entire audio through recorded original audio clips. Background technique [0002] With the rapid development of modern information technology, especially multimedia technology and network technology, a large amount of multimedia information can be obtained from the Internet. And various audio files have become the most frequently searched objects by users in various search engines (such as Baidu, Google, etc.). The traditional audio information retrieval technology is mainly based on text, but the traditional text-based audio information retrieval cannot meet people's needs for audio retrieval. That is to say, if the user hears a piece of very familiar audio and wants to query the inf...

AI Technical Summary

Problems solved by technology

[0007] In view of this, the object of the present invention is to provide an audio retrieval method based on long-term structural voiceprint and multi-layer filtering, which can effectively solve the problem of conflict between voiceprint stability and collision rate. For massive audio databases, the present invention It can effectively improve the retrieval accuracy, retrieval efficiency and anti-noise performance of audio retrieval

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