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: A Robust Formant Extraction Algorithm Combining Spectral Peak Picking and Root Polishing | Hindawi Publishing Corporation EURASIP Journal on Applied Signal Processing Volume 2006 Article ID 67960 Pages 1-16 DOI ASP 2006 67960 A Robust Formant Extraction Algorithm Combining Spectral Peak Picking and Root Polishing Chanwoo Kim 1 Kwang-deokSeo 2 and Wonyong Sung3 1 School of Computer Science Carnegie Mellon University Pittsburgh PA 15213-3891 USA 2 Computer and Telecommunications Engineering Division Yonsei University Wonju Gangwon 220-710 Korea 3 School of Electrical Engineering and Computer Science Seoul National University Gwanak-gu Seoul 151-744 Korea Received 22 September 2004 Revised 27 July 2005 Accepted 22 August 2005 Recommended for Publication by Ulrich Heute We propose a robust formant extraction algorithm that combines the spectral peak picking formants location examining for peak merger checking and the root extraction methods. The spectral peak picking method is employed to locate the formant candidates and the root extraction is used for solving the peak merger problem. The location and the distance between the extracted formants are also utilized to efficiently find out suspected peak mergers. The proposed algorithm does not require much computation and is shown to be superior to previous formant extraction algorithms through extensive tests using TIMIT speech database. Copyright 2006 Hindawi Publishing Corporation. All rights reserved. 1. INTRODUCTION The formant is one of the most important features in speech signals and is used for many applications such as speech recognition speech characterization and synthesis. Previous formant extraction methods can largely be classified into spectral peak picking root extraction and analysis by synthesis 1-4 . The spectral peak picking methods and their variants have been widely used for a long time because of low computational complexity but they often seriously suffer from the peak merger problems 1-3 where two adjoining formants are identified into a single one. The root extraction methods
