Microphone array post - processing using instantaneous direction of arrival (original) (raw)

2006

Abstract

Inthis,paper ,we describe ,a novel ,algorithm ,for post- processing,a microphone ,array’s beamformer ,output ,to achieve better spatial filtering under noise and reverberation. For each audio frame and frequency ,bin the algorithm ,esti- mates,the spatial probability for sound ,source presence ,and applies a spatio-temporal filter towards the look-up direction. Itis implemented ,as a ,real-time post-processor after a time- invariant beamformer,and it substantially improves,the direc- tivity of the microphone,array.The algorithm is CPU efficient and,adapts quickly ,when ,the listening direction changes. It was,evaluated ,with a linear ,four element ,microphone ,array. The directivity index improvement is up to 8 dB, the suppres- sion of a jammer,40° from the sound source is up to 17 dB.

Ivan Tashev hasn't uploaded this paper.

Let Ivan know you want this paper to be uploaded.

Ask for this paper to be uploaded.