We propose a beamforming method that is applicable to near sound fields, where a filter-and-sum microphone array which maintains better quality for the target sound than the conventional delay-and-sum array, and describe a real-time implementation that includes steering of the beam to detected talker locations. With the use of a microphone array, our system also reduces levels of noise, to achieve high-quality sound acquisition; furthermore, it allows the talker to be in any position. Computer simulation and experiments show that our method will be effective in teleconferencing systems.

Authors: Kobayashi, Kazunori; Furuya, Ken-ichi; Kataoka, Akitoshi
Affiliation: NTT Cyber Space Laboratories, Nippon Telegraph and Telephone Corporation, Tokyo, Japan
AES Convention: 113 (October 2002) Paper Number: 5642
Publication Date: October 1, 2002
Subject: Signal Processing

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