现代电子技术2024，Vol.47Issue(10)：18-22,5.DOI:10.16652/j.issn.1004-373x.2024.10.004
非平稳强噪声环境中的音频信号端点检测系统
Audio signal endpoint detection system in non-stationary strong noise environment
摘要
Abstract
In order to improve the ability of audio signal endpoint recognition,an audio signal endpoint detection system is designed in non-stationary and strong noise environments.A hardware unit for audio signal endpoint detection is constructed,and a preprocessing unit is used to perform pre emphasis,framing,and windowing processing on the audio signal.On the basis of extracting the MFCC cepstral distance feature and frequency band variance feature of the audio signal,the endpoint detection unit can determine the appropriate threshold based on the dynamic threshold estimation strategy.The dual feature parameter and dual threshold method is used to determine the start and end points of the audio signal and separate the speech and non speech frames.The envelope is used to determine the delay unit to prevent the noise segment from being incorrectly recognized as a speech segment and to avoid the problem of too long trailing.The experimental results show that the designed system can reailze the endpoint detection of audio signals in non-stationary strong noise environments,and the detection error can meet the set requirements.关键词
非平稳噪声/强噪声/音频信号/端点检测/MFCC特征/频带方差/动态阈值估计/双门限法Key words
non-stationary noise/strong noise/audio signal/endpoint detection/MFCC features/frequency band variance/dynamic threshold estimation/dual threshold method分类
电子信息工程引用本文复制引用
郭凯丽,王建英..非平稳强噪声环境中的音频信号端点检测系统[J].现代电子技术,2024,47(10):18-22,5.
