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arXiv 2007.10729eess.AScs.CVcs.SD
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说话人自动确认中数据驱动滤波器组的优化

Optimization of data-driven filterbank for automatic speaker verification

Université de Lorraine(洛林大学);CNRS(法国国家科学研究中心);Inria(法国国家信息与自动化研究所);LORIA(洛林计算机科学与应用研究实验室)

Susanta Sarangi, Md Sahidullah, Goutam Saha

摘要:

大多数的语音处理应用程序使用三角形滤波器在梅尔尺度间隔的特征提取。在本文中,我们提出了一种新的数据驱动的滤波器设计方法,优化滤波器参数从一个给定的语音数据。首先,我们介绍了一种基于帧选择的方法,用于开发基于语音信号的频率弯曲尺度。然后,我们提出了一种新的方法来计算滤波器的频率响应,通过使用主成分分析(PCA)。与最近引入的基于深度学习的方法相比,所提出的方法的主要优点是它需要非常有限的未标记语音数据。我们证明,建议的滤波器组有更多的发言人区分能力比常用的梅尔滤波器组以及现有的数据驱动滤波器组。我们进行自动说话人确认(ASV)实验与不同的语料库使用各种分类器后端。我们发现,在大多数情况下,建议的滤波器组创建的声学特征优于现有的梅尔频率倒谱系数(MFCC)和基于语音信号的频率倒谱系数(SFCC)。在VoxCeleb 1和流行的i-vector后端的实验中,我们观察到MFCC的等错误率(EER)相对提高了9.75%。类似地,最近引入的x向量系统的相对改进为4.43%。我们得到进一步的改进,融合所提出的方法与标准的基于MFCC的方法。

英文摘要:

Most of the speech processing applications use triangular filters spaced in mel-scale for feature extraction. In this paper, we propose a new data-driven filter design method which optimizes filter parameters from a given speech data. First, we introduce a frame-selection based approach for developing speech-signal-based frequency warping scale. Then, we propose a new method for computing the filter frequency responses by using principal component analysis (PCA). The main advantage of the proposed method over the recently introduced deep learning based methods is that it requires very limited amount of unlabeled speech-data. We demonstrate that the proposed filterbank has more speaker discriminative power than commonly used mel filterbank as well as existing data-driven filterbank. We conduct automatic speaker verification (ASV) experiments with different corpora using various classifier back-ends. We show that the acoustic features created with proposed filterbank are better than existing mel-frequency cepstral coefficients (MFCCs) and speech-signal-based frequency cepstral coefficients (SFCCs) in most cases. In the experiments with VoxCeleb1 and popular i-vector back-end, we observe 9.75% relative improvement in equal error rate (EER) over MFCCs. Similarly, the relative improvement is 4.43% with recently introduced x-vector system. We obtain further improvement using fusion of the proposed method with standard MFCC-based approach.

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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