Audio file retrieval method and device

An audio file and audio technology, which is applied in the field of audio file retrieval methods and devices, can solve the problems of poor accuracy of audio fingerprints, achieve the effects of improving accuracy, avoiding false formant problems, and ensuring accuracy

Inactive Publication Date: 2018-04-17
TENCENT TECH (SHENZHEN) CO LTD +1
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  • Abstract
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  • Application Information

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Problems solved by technology

[0006] The embodiment of the present invention provides an audio file retrieval method and dev...

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  • Audio file retrieval method and device
  • Audio file retrieval method and device

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Embodiment Construction

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0034] For ease of understanding, first explain the nouns involved in the embodiments of the present invention:

[0035] Audio frame: A piece of audio obtained by dividing an audio clip in the time domain according to a preset duration.

[0036] Pseudo-formant problem: refers to the problem of misidentifying two superimposed non-formant peaks in the spectrum as formant peaks.

[0037] Time domain misalignment: refers to the situation where the au...

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Abstract

The invention discloses an audio file retrieval method and an audio file retrieval device and belongs to the field of audio processing. The method comprises the steps of collecting a to-be-retrieved audio fragment in real time; acquiring a difference value of frequency spectrum centroids of corresponding sub-bands of every two audio frames of adjacent time sequences in a plurality of audio framesof the audio fragment to obtain a plurality of difference values; obtaining an audio fingerprint corresponding to the two audio frames based on the plurality of difference values and a preset difference value threshold, wherein each bit of the audio fingerprint is determined by whether the difference value corresponding to the bit meets the preset condition of the difference value; and retrievingin an audio file library based on the audio fingerprint of multiple audio frames to obtain a target audio file matched with the audio fragment. According to the audio file retrieval method and the audio file retrieval device, the accuracy for retrieval of the audio file is improved.

Description

technical field [0001] The invention relates to the field of audio processing, in particular to an audio file retrieval method and device. Background technique [0002] With the rapid increase of the number of audio files in the network, the demand for retrieving a large number of audio files is becoming more and more urgent. In various practical application scenarios, audio clips are often obtained. At this time, how to retrieve a target audio file matching the audio clip from an audio file library storing a large number of audio files has become a hot spot in the industry. [0003] In the related art, the audio file is retrieved based on the Philips algorithm: the audio clip is stacked according to a certain frame and framed, and after obtaining a plurality of audio frames, each audio frame is subjected to Fast Fourier Transform (FFT, FastFourier Transformation) ), to obtain the spectrum of each audio frame, divide each audio frame into 33 subbands in the frequency domain...

Claims

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Application Information

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IPC IPC(8): G06F17/30G06F40/00
CPCG06F16/683G06F16/634G06F16/686
Inventor 张菁芸王辉
Owner TENCENT TECH (SHENZHEN) CO LTD
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