Sound Localization Method Using Modified SRP-PHAT Algorithm
改进的SRP-PHAT声源定位方法

A method, which combines Steered Response Power with PHAse Transform (SRP-PHAT), is a robust speech localization approach with microphone arrays. A relatively precise direction of arrival (DOA) estimation can be achieved by using it in the environment of weak noise and moderate reverberation. However, the localization performance degrades sharply in the environment of low SNR and strong reverberation. Moreover, a real-time localization system is also difficult to be realized due to its heavy computation load. Aiming at these problems, a modified SRP-PHAT localization algorithm is proposed in order to improve the performance of speech localization system. The modified SRP-PHAT algorithm reduces computation load greatly. The results of simulation experiment indicate that the proposed method gives higher localization precision even in an environment of low SNR and strong reverberation.