arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2202.04882cs.SDeess.AS
收藏

基于听觉模型的相位感知贝叶斯谱幅度估计单通道语音增强

Auditory Model based Phase-Aware Bayesian Spectral Amplitude Estimator for Single-Channel Speech Enhancement

Indian Institute of Technology, Kharagpur(印度理工学院卡拉格普尔分校)

Suman Samui, Indrajit Chakrabarti, Soumya K. Ghosh

摘要:

短时谱幅度的贝叶斯估计是噪声污染语音增强的主要方法之一。当考虑任何感知相关的成本函数时,这些估计器的性能通常会显着提高。另一方面,基于相位的语音信号处理的最新进展表明,基于频谱相位估计方法的纯相位增强即使在低SNR条件下也可以提供感知语音质量和可懂度的联合改善。在本文中,利用感知动机的成本函数,涉及STSA估计和真正的干净的语音,并利用先验谱相位信息,我们推导出一个相位感知贝叶斯STSA估计。基于人类听觉系统的特性,即耳蜗的动态压缩非线性、感知响度理论和耳朵的同时掩蔽特性,来选择成本函数的参数。这种类型的参数选择方案导致更多的噪声降低,同时限制语音失真。推导出的STSA估计器是最佳的MMSE意义下,如果事先的相位信息是可用的。然而,在实践中,典型地,通过采用在过去几年中开发的不同类型的谱相位估计技术,仅能够获得干净语音相位的估计。在一个盲目的设置,我们已经评估了不同类型的标准相位估计方法,在文献中提出的贝叶斯STSA估计。实验结果表明,所提出的估计器可以实现性能上的显着改善比传统的相位盲方法。

英文摘要:

Bayesian estimation of short-time spectral amplitude is one of the most predominant approaches for the enhancement of the noise corrupted speech. The performance of these estimators are usually significantly improved when any perceptually relevant cost function is considered. On the other hand, the recent progress in the phase-based speech signal processing have shown that the phase-only enhancement based on spectral phase estimation methods can also provide joint improvement in the perceived speech quality and intelligibility, even in low SNR conditions. In this paper, to take advantage of both the perceptually motivated cost function involving STSAs of estimated and true clean speech and utilizing the prior spectral phase information, we have derived a phase-aware Bayesian STSA estimator. The parameters of the cost function are chosen based on the characteristics of the human auditory system, namely, the dynamic compressive nonlinearity of the cochlea, the perceived loudness theory and the simultaneous masking properties of the ear. This type of parameter selection scheme results in more noise reduction while limiting the speech distortion. The derived STSA estimator is optimal in the MMSE sense if the prior phase information is available. In practice, however, typically only an estimate of the clean speech phase can be obtained via employing different types of spectral phase estimation techniques which have been developed throughout the last few years. In a blind setup, we have evaluated the proposed Bayesian STSA estimator with different types of standard phase estimation methods available in the literature. Experimental results have shown that the proposed estimator can achieve substantial improvement in performance than the traditional phase-blind approaches.

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。

↑