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Parameter Optimization in VAD Used in Noise Spectral Estimation for Spectral Suppression Method

机译:频谱抑制方法在噪声频谱估计中使用的VAD参数优化

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摘要

In spectral suppression noise canceller, spectral gain is multiplied to the noisy speech spectrum to reduce noise. To calculate spectral gain, noise spectrum estimation is necessary. By using Voice Activiy Detector (VAD), noise spectrum is estimated by discriminating the input noisy speech into speech/quasi-speechon-speech frames. The threshold of noisy speech discrimination is not adaptive to input noise type in the conventional method. In this paper, threshold optimization method is proposed. Based on noise characteristics, optimal parameters for colorless noise and colored noise are proposed. Also, automatic detection of colorless noise and colored noise algorithm is proposed. Simulations are carried out in 5 different noise-changed conditions by using 3 sets of input speech signals.
机译:在频谱抑制噪声消除器中,频谱增益被乘以嘈杂的语音频谱以减少噪声。为了计算频谱增益,必须进行噪声频谱估计。通过使用语音活动检测器(VAD),可以通过将输入的有噪语音区分为语音/准语音/非语音帧来估计噪声频谱。在传统方法中,嘈杂语音辨别的阈值不适用于输入噪声类型。本文提出了阈值优化方法。基于噪声特性,提出了无色噪声和有色噪声的最优参数。同时,提出了无色噪声的自动检测和有色噪声算法。通过使用3组输入语音信号在5种不同的噪声变化条件下进行仿真。

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  • 来源
    《電子情報通信学会技術研究報告》 |2012年第466期|p.103-108|共6页
  • 作者单位

    Division of Electrical and Computer Engineering, Graduate School of Natural Science and Technology, Kanazawa University Kakuma-machi, Kanazawa, 920-1192 Japan;

    Division of Electrical and Computer Engineering, Graduate School of Natural Science and Technology, Kanazawa University Kakuma-machi, Kanazawa, 920-1192 Japan;

    Division of Electrical and Computer Engineering, Graduate School of Natural Science and Technology, Kanazawa University Kakuma-machi, Kanazawa, 920-1192 Japan;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    VAD; noise; canceller; noise; discrimination; colorless; noise; colored; noise;

    机译:VAD;噪声;抵消器;噪声;歧视无色;噪声;有色;噪声;

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