arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1003.5627cs.SDcs.LG
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基于小波变换的Mel倒谱系数用于说话人辨识

Wavelet-Based Mel-Frequency Cepstral Coefficients for Speaker Identification using Hidden Markov Models

Zagazig University(扎加齐克大学)

Mahmoud I. Abdalla, Hanaa S. Ali

摘要:

为了提高说话人辨识系统的性能,提出了一种有效的、鲁棒的、能够在噪声环境下工作的语音特征提取方法。利用小波变换的时频多分辨率特性,将输入的语音信号分解到各个频率通道。为了捕捉信号的特征,计算小波通道的梅尔倒谱系数(MFCC)。隐马尔可夫模型(HHHT)用于识别阶段,因为它们比动态时间规整(DTW)更好地识别说话人的特征。与传统的MFCC特征提取方法的比较表明,该方法不仅有效地降低了噪声的影响,而且提高了识别率。使用所提出的特征提取技术获得了99.3%的识别率相比,98.7%,使用MFCC。当测试模式被信噪比为20 dB的加性高斯白噪声污染时,使用该方法的识别率为97.3%,而使用MFCC的识别率为93.3%。

英文摘要:

To improve the performance of speaker identification systems, an effective and robust method is proposed to extract speech features, capable of operating in noisy environment. Based on the time-frequency multi-resolution property of wavelet transform, the input speech signal is decomposed into various frequency channels. For capturing the characteristic of the signal, the Mel-Frequency Cepstral Coefficients (MFCCs) of the wavelet channels are calculated. Hidden Markov Models (HMMs) were used for the recognition stage as they give better recognition for the speaker's features than Dynamic Time Warping (DTW). Comparison of the proposed approach with the MFCCs conventional feature extraction method shows that the proposed method not only effectively reduces the influence of noise, but also improves recognition. A recognition rate of 99.3% was obtained using the proposed feature extraction technique compared to 98.7% using the MFCCs. When the test patterns were corrupted by additive white Gaussian noise with 20 dB S/N ratio, the recognition rate was 97.3% using the proposed method compared to 93.3% using the MFCCs.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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