tailieunhanh - Báo cáo hóa học: " Research Article Interface for Barge-in Free Spoken Dialogue System Based on Sound Field Reproduction and Microphone Array"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Interface for Barge-in Free Spoken Dialogue System Based on Sound Field Reproduction and Microphone Array | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2007 Article ID 57470 13 pages doi 2007 57470 Research Article Interface for Barge-in Free Spoken Dialogue System Based on Sound Field Reproduction and Microphone Array Shigeki Miyabe 1 Yoichi Hinamoto 2 Hiroshi Saruwatari 1 Kiyohiro Shikano 1 and Yosuke Tatekura3 1 Graduate School of Information Science Nara Institute of Science and Technology Takayama-Cho 8916-5 Ikoma-Shi Nara 630-0192 Japan 2 Department of Control Engineering Takuma National College of Technology Takuma-Cho Koda 551 Mitoyo-Shi Kagawa 769-1192 Japan 3 Faculty of Engineering Shizuoka University Johoku 3-5-1 Hamamatsu-Shi Shizuoka 432-8561 Japan Received 1 May 2006 Revised 17 October 2006 Accepted 29 October 2006 Recommended by Aki Harma A barge-in free spoken dialogue interface using sound field control and microphone array is proposed. In the conventional spoken dialogue system using an acoustic echo canceller it is indispensable to estimate a room transfer function especially when the transfer function is changed by various interferences. However the estimation is difficult when the user and the system speak simultaneously. To resolve the problem we propose a sound field control technique to prevent the response sound from being observed. Combined with a microphone array the proposed method can achieve high elimination performance with no adaptive process. The efficacy of the proposed interface is ascertained in the experiments on the basis of sound elimination and speech recognition. Copyright 2007 Shigeki Miyabe et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. 1. INTRODUCTION For hands-free realization of smooth communication with a spoken dialogue system it should be guaranteed that a user s command utterance reaches the system .