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次へ: Introduction

Accurate Detection Algorithm for Concurrent Sounds
Based on EM Algorithm and Information Criterion


Graduate School of Information Science and Technology, The University of Tokyo
7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan
{kameoka,nishi,sagayama}@hil.t.u-tokyo.ac.jp

概要:

In this paper, a single channel multi-pitch detection algorithm is described. Though the temporal continuity of pattern should be considered, we discuss a process done independently on each single frame for the first step. A model of multiple harmonic structures is constructed with a mixture of constrained Gaussian mixtures with which a single harmonic structure is modeled. Our algorithm enables to detect both a number of concurrent speakers, and each spectral envelope of underlying harmonic structure based on a maximum likelihood estimation of the model parameters using EM algorithm and an information criterion. It operates without a priori information of contours and a restriction of a number of speakers, and extracts accurate s as continuous values with spectral domain procedures. Experiments showed our algorithm outperformed well-known cepstrum for both speech signals of a single speaker and simultaneous two speakers.




next up previous
次へ: Introduction
平成16年3月25日