Multiple-nulls-steering beamformer based on both talker and noise direction-of-arrival estimation

Acoustical Science and Technology

Masato Nakayama²  Yoichi Yamashita²  Takanobu Nishiura²  Noboru Nakasako¹ 

[1] Faculty of Biology-Oriented Science and Technology, Kinki University;College of Information Science and Engineering, Ritsumeikan University

关键词: Beamforming;    Microphone-array;    Distant-talking speech recognition;    Talkers and noises localization;    Multiple-nulls-steering beamformer;   

DOI  :  10.1250/ast.34.80

学科分类：声学和超声波

来源: Acoustical Society of Japan

【 摘 要 】

References(13)Beamforming with a microphone-array is an ideal candidate for distant-talking speech recognition. An adaptive beamformer can achieve beamforming with a small microphone-array, but it had difficulty extracting distant-moving speech and reducing moving noises, because it must rapidly train long multiple-channel adaptive filters by using observed noises with a microphone-array. However, if positions of both talkers and noises can be estimated, adaptive filters may not need to be trained in real noisy environments. Therefore, we propose a multiple-nulls-steering beamformer based on both talker and noise localization that does not require adaptive training with observed noises. Finally, we confirmed the validity and effectiveness of the proposed method through computer simulations and evaluation experiments in real noisy environments.

【 授权许可】

Unknown