“B-格式”声信号实值MUSIC算法的DOA估计

Real-valued MUSIC algorithm DOA estimation based on B-format signal

到达方向(DOA)是声学场景分析中非常重要的参数,其估计的准确性、高效性将直接影响对声信号处理的有效性。本文提出了“B-格式”麦克风信号中的实值MUSIC方法估计DOA,将复数信号空间扩展为实数信号空间,用于抑制信号中存在的混响、噪声等所引起的DOA估计偏差。该估计方式可以在每个时间和频率上进行DOA估计,对音频的分块操作提供了良好的依据。实验表明,该方法相比于复数空间MUSIC算法和声强DOA估计均有一定程度的性能提升。

The direction of arrival(DOA)is a very important parameter in acoustic scene analysis.The accuracy and efficiency of its estimation will directly affect the effectiveness of acoustic signal processing.In this paper,a real-valued MUSIC method from the"B-format"microphone signal is proposed to expand the space of complex signal to real signal space to suppress DOA estimation bias caused by reverberation and noise in the signal.This estimation method can perform DOA estimation at each time and frequency,and provides a good basis for audio block operation.Experiments show that this method has a certain degree of performance improvement over the complex space MUSIC algorithm and sound intensity DOA estimation.