tailieunhanh - Báo cáo hóa học: "Research Article A Robust Statistical-Based Speaker’s Location Detection Algorithm in a Vehicular Environment"

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 A Robust Statistical-Based Speaker’s Location Detection Algorithm in a Vehicular Environment | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2007 Article ID 13601 11 pages doi 2007 13601 Research Article A Robust Statistical-Based Speaker s Location Detection Algorithm in a Vehicular Environment Jwu-Sheng Hu Chieh-Cheng Cheng and Wei-Han Liu Department of Electrical and Control Engineering National Chiao Tung University Hsinchu 300 Taiwan Received 1 May 2006 Revised 27 July 2006 Accepted 26 August 2006 Recommended by Aki Harma This work presents a robust speaker s location detection algorithm using a single linear microphone array that is capable of detecting multiple speech sources under the assumption that there exist nonoverlapped speech segments among sources. Namely the overlapped speech segments are treated as uncertainty and are not used for detection. The location detection algorithm is derived from a previous work 2006 where Gaussian mixture models GMMs are used to model location-dependent and content and speaker-independent phase difference distributions. The proposed algorithm is proven to be robust against the complex vehicular acoustics including noise reverberation near-filed far-field line-of-sight and non-line-of-sight conditions and microphones mismatch. An adaptive system architecture is developed to adjust the Gaussian mixture GM location model to environmental noises. To deal with unmodeled speech sources as well as overlapped speech signals a threshold adaptation scheme is proposed in this work. Experimental results demonstrate high detection accuracy in a noisy vehicular environment. Copyright 2007 Jwu-Sheng Hu 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 Electronic systems such as mobile phones global positioning systems GPS CD or VCD players air conditioners and so forth are becoming increasingly .