关键词: 计算声场景分析, 运动声源定位, 过零点, Teager能量算子, 双耳时间差

Abstract: In CASA（Computational Auditory Scene Analysis）, the main factor of source localization is ITD. To estimate ITD, conventional methods use cross-correlation of binaural firing rates of neurons. However, these methods have two obvious flaws with complex calculation and weak anti-noise ability, bringing a huge bottleneck to realize moving source real-time localization. The very prevalent method of Zero-Crossing Time Differences（ZCTD） is improved in the proposed method. The novel method uses Teager Energy Operator（TEO） to directly extract reliable ITD samples, and omits the procedure of extracting the reliable ITD samples by estimated SNR. The simulation results show that this method can more rapidly and more accurately estimate ITD and has strong anti-noise ability. This method is applied to locating the moving sound. This paper presents the model of moving sound location on zero-crossing points binaural time differences, and verifies the possibility of realizing moving sound real-time localization by simulation.

Key words: Computational Auditory Scene Analysis（CASA）, moving sound localization, zero-crossing points, Teager Energy Operator, Interaural Time Differences（ITD）