TY - GEN
T1 - Speech enhancement using square microphone array for mobile devices
AU - Takada, Shintaro
AU - Ogawa, Tetsuji
AU - Akagiri, Kenzo
AU - Kobayashi, Tetsunori
PY - 2008/9/16
Y1 - 2008/9/16
N2 - In this paper, we propose a new type of speech enhancement method that is suitable for mobile devices used in noisy environments. For the sake of achieving high-performance speech recognition and auditory perception in the mobile devices, disturbance noises have to be removed under the requirements of a space-saving microphone arrangement and a low computational cost. The proposed method can reduce both the directional and the diffuse noises under the requirements for the mobile devices by applying the square microphone array and the low-cost processing that consists of multiple null beam-forming, their minimum power channel selection and Wiener filtering. The effectiveness of the proposed method is clarified for speech recognition accuracies and speech qualities under the condition in which both the directional and the diffuse noises exist simultaneously: it reduced 40% of recognition errors and improved PESQ-based MOS value by 0.75 point.
AB - In this paper, we propose a new type of speech enhancement method that is suitable for mobile devices used in noisy environments. For the sake of achieving high-performance speech recognition and auditory perception in the mobile devices, disturbance noises have to be removed under the requirements of a space-saving microphone arrangement and a low computational cost. The proposed method can reduce both the directional and the diffuse noises under the requirements for the mobile devices by applying the square microphone array and the low-cost processing that consists of multiple null beam-forming, their minimum power channel selection and Wiener filtering. The effectiveness of the proposed method is clarified for speech recognition accuracies and speech qualities under the condition in which both the directional and the diffuse noises exist simultaneously: it reduced 40% of recognition errors and improved PESQ-based MOS value by 0.75 point.
KW - Array signal processing
KW - Mobile devices
KW - Speech enhancement
KW - Speech recognition
KW - Wiener tittering
UR - http://www.scopus.com/inward/record.url?scp=51449115019&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=51449115019&partnerID=8YFLogxK
U2 - 10.1109/ICASSP.2008.4517609
DO - 10.1109/ICASSP.2008.4517609
M3 - Conference contribution
AN - SCOPUS:51449115019
SN - 1424414849
SN - 9781424414840
T3 - ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
SP - 313
EP - 316
BT - 2008 IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP
T2 - 2008 IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP
Y2 - 31 March 2008 through 4 April 2008
ER -