tailieunhanh - Báo cáo hóa học: " Particle Filter Design Using Importance Sampling for Acoustic Source Localisation and Tracking in Reverberant Environments"

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: Particle Filter Design Using Importance Sampling for Acoustic Source Localisation and Tracking in Reverberant Environments | Hindawi Publishing Corporation EURASIP Journal on Applied Signal Processing Volume 2006 Article ID 17021 Pages 1-9 DOI ASP 2006 17021 Particle Filter Design Using Importance Sampling for Acoustic Source Localisation and Tracking in Reverberant Environments Eric A. Lehmann1 and Robert C. Williamson2 3 1 Western Australian Telecommunications Research Institute 35 Stirling Highway Crawley WA 6009 Australia 2 National ICT Australia Locked Bag 8001 Canberra ACT 2601 Australia 3 Computer Science Laboratory Australian National University Canberra ACT 0200 Australia Received 23 January 2005 Revised 29 May 2005 Accepted 22 August 2005 Sequential Monte Carlo methods have been recently proposed to deal with the problem of acoustic source localisation and tracking using an array of microphones. Previous implementations make use of the basic bootstrap particle filter whereas a more general approach involves the concept of importance sampling. In this paper we develop a new particle filter for acoustic source localisation using importance sampling and compare its tracking ability with that of a bootstrap algorithm proposed previously in the literature. Experimental results obtained with simulated reverberant samples and real audio recordings demonstrate that the new algorithm is more suitable for practical applications due to its reinitialisation capabilities despite showing a slightly lower average tracking accuracy. A real-time implementation of the algorithm also shows that the proposed particle filter can reliably track a person talking in real reverberant rooms. Copyright 2006 Hindawi Publishing Corporation. All rights reserved. 1. INTRODUCTION The concept of acoustic source localisation and tracking ASLT plays an important role in many practical speech acquisition systems. Domains of application include teleconferencing multimedia information processing and handsfree telephony to name but a few. Other applications such as automatic speech recognition and speaker .