Auditory model based direction estimation of concurrent speakers from binaural signals
Auditory model based direction estimation of concurrent speakers from binaural signals
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DOI：
10.1016/j.specom.2010.05.006
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发表时间：
2011-05-01
影响因子：
3.2
通讯作者：
Hohmann, Volker
中科院分区：
文献类型：
--
作者：
Dietz, Mathias;Ewert, Stephan D.;Hohmann, Volker
人类在不利条件下显示出非常强大的定位声音的能力。双耳声音定位的计算模型和到达方向（DOA）估计的技术方法也表现出良好的性能，然而，它们的双耳特征提取和进一步分析的策略部分不同于目前已知的人类听觉系统。本研究探讨基于听觉模型的DOA估计，强调已知的功能和限制的听觉双耳处理，如（i）高的时间分辨率，（ii）有限的频率范围，以利用时间的精细结构，（iii）使用的时间包络的差异，和（iv）有限的范围内，以补偿耳间的时间延迟。DOA估计性能进行了研究，为多达五个并发扬声器在自由领域和多达三个扬声器在噪声的存在下。在这些条件下的DOA误差始终小于5度。还测试了移动扬声器的条件，并且可以同时跟踪多达三个移动扬声器。作为双耳时间分辨率的函数的DOA性能的分析表明，由听觉模型采用的约5 ms的短时间常数对并发源的鲁棒性是至关重要的。(C)2010爱思唯尔有限公司版权所有。
Humans show a very robust ability to localize sounds in adverse conditions. Computational models of binaural sound localization and technical approaches of direction-of-arrival (DOA) estimation also show good performance, however, both their binaural feature extraction and the strategies for further analysis partly differ from what is currently known about the human auditory system. This study investigates auditory model based DOA estimation emphasizing known features and limitations of the auditory binaural processing such as (i) high temporal resolution, (ii) restricted frequency range to exploit temporal fine-structure, (iii) use of temporal envelope disparities, and (iv) a limited range to compensate for interaural time delay. DOA estimation performance was investigated for up to five concurrent speakers in free field and for up to three speakers in the presence of noise. The DOA errors in these conditions were always smaller than 5 degrees. A condition with moving speakers was also tested and up to three moving speakers could be tracked simultaneously. Analysis of DOA performance as a function of the binaural temporal resolution showed that short time constants of about 5 ms employed by the auditory model were crucial for robustness against concurrent sources. (C) 2010 Elsevier B.V. All rights reserved.