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arXiv 1506.03604cs.SD
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基于ITD模型的双耳相干扩散比估计

Binaural coherent-to-diffuse-ratio estimation for dereverberation using an ITD model

Institute of Acoustics, CAS(中国科学院声学研究所)

Chengshi Zheng, Andreas Schwarz, Walter Kellermann, Xiaodong Li

摘要:

大多数以前提出的双通道相干扩散比(CDR)估计是基于自由场模型。当用于双耳信号时,例如,对于双耳助听器中的去混响,由于头部的影响,它们的性能可能降低,即使当所需扬声器的到达方向是精确已知的。在本文中,头部阴影效应考虑CDR估计通过使用一个简化的模型的频率相关的双耳时间差和模型的双耳相干的扩散噪声场。基于CDR的去混响与测量的双耳脉冲响应的评估表明,建议的双耳CDR估计可以提高PESQ分数。

英文摘要:

Most previously proposed dual-channel coherent-to-diffuse-ratio (CDR) estimators are based on a free-field model. When used for binaural signals, e.g., for dereverberation in binaural hearing aids, their performance may degrade due to the influence of the head, even when the direction-of-arrival of the desired speaker is exactly known. In this paper, the head shadowing effect is taken into account for CDR estimation by using a simplified model for the frequency-dependent interaural time difference and a model for the binaural coherence of the diffuse noise field. Evaluation of CDR-based dereverberation with measured binaural impulse responses indicates that the proposed binaural CDR estimators can improve PESQ scores.

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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