Method for segmenting audio frequencies on basis of lay reliability variation trend

A technology with changing trends and reliability, applied in speech analysis, instruments, etc., can solve the problems of redundant segmentation points, limitations of hard judgment methods, missed detection, etc., and achieve the effect of improving comprehensive performance and reducing redundant segmentation points

Inactive Publication Date: 2017-01-04
XI AN JIAOTONG UNIV
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Problems solved by technology

[0004] In order to solve the problems in the existing segmentation method that the setting of the threshold leads to redundant or missed detection of the segmentation point, the cumulative error caused by the window dete

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  • Method for segmenting audio frequencies on basis of lay reliability variation trend
  • Method for segmenting audio frequencies on basis of lay reliability variation trend
  • Method for segmenting audio frequencies on basis of lay reliability variation trend

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Embodiment Construction

[0026] The specific embodiment of the present invention will be described in detail below in conjunction with the accompanying drawings, but the present invention is not limited to this embodiment. In order to provide the public with a thorough understanding of the present invention, specific details are specified in the following preferred embodiments of the present invention.

[0027] In order to solve the problem of too many redundant points and the limitation of hard judgment in audio segmentation, the present invention detects the acoustic jump point according to the variation trend of reliability, and its principle is as follows:

[0028] Extract audio features by frame for each signal segment X={x 1 ,x 2 ,..,x N}, where N is the number of audio frames, and the dimension of each frame feature is P. assuming x k ∈X is an audio segmentation point of this song, then x k The audio feature X is divided into two parts, X 1 ={x 1 ,x 2 ,..,x k} with X 2 ={x k+1 ,x k+...

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Abstract

The invention discloses a method for segmenting audio frequencies on the basis of lay reliability variation trend. The method includes particular steps of 1), detecting layer jump points in fixed-length analysis windows on the basis of reliability variation trend; 2), segmenting the audio frequencies on the basis of detection on the jump points in the fixed-length analysis windows. The method has the advantages that accumulative errors due to split-window detection can be prevented by the aid of the fixed-length analysis windows, the acoustic jump points are detected in the fixed-length analysis windows according to the reliability variation trend, and accordingly limitation problems of excessive redundant points and hard decision can be solved; the problem of mixing detection of existing jump points can be solved by the aid of the fixed-length analysis windows in top-down layer detection modes, redundant segmentation points can be effectively reduced, and accordingly the comprehensive performance can be improved.

Description

【Technical field】 [0001] The invention belongs to the field of audio signal processing, in particular to an audio segmentation method based on the variation trend of hierarchical reliability. 【Background technique】 [0002] In recent years, in the field of signal processing, in terms of signal segmentation processing, content-based audio signal segmentation, also known as jump point detection, refers to the phenomenon that there are differences between auditory features when a continuous audio signal stream changes. Audio is divided into segments, each of which is either consistent in content or similar in acoustic characteristics. At present, content-based audio signal segmentation methods are mainly divided into three categories: distance-based, model-based, and model-selection-based segmentation methods. Among them, the distance-based segmentation method uses the distance between samples of adjacent windows to measure the similarity of adjacent audio segments. It has the...

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Application Information

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IPC IPC(8): G10L25/45G10L25/27G10L21/0272
CPCG10L21/0272G10L25/27G10L25/45
Inventor 杨新宇王银瑞丁建行董怡卓罗晶杨泽正王艺蒙李雨墨
Owner XI AN JIAOTONG UNIV
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