FIRフィルタによるsinc関数の近似に基づく音源定位

カテゴリ: 論文誌(論文単位)

グループ名: 【C】電子・情報・システム部門

発行日: 2024/02/01

タイトル(英語): Sound Source Localization Based on Approximation of Sinc Function by FIR Filter

著者名: 藤田　一輝（東京電機大学工学部電気電子工学科），陶山　健仁（東京電機大学工学部電気電子工学科）

著者名(英語): Kazuki Fujita (Department of Electrical and Electronic Engineering, School of Engineering, Tokyo Denki University), Kenji Suyama (Department of Electrical and Electronic Engineering, School of Engineering, Tokyo Denki University)

キーワード: 音源定位，伝搬遅延特性，sinc関数，FIRフィルタ，最適化問題 sound source localization，propagation delay characteristics，sinc function，FIR filter，optimization problem

要約(英語): Sound source localization is carried out based on TDOA (Time-Difference-Of-Arrival) between microphones. When the TDOA is detected from a phase difference between two microphones, an ambiguity of phase difference often occurs under a high resolution situation and thus the estimation accuracy degrades significantly. In this paper, a propagation delay characteristic is approximated directly using FIR (Finite Impulse Response) filter, in which an impulse response is described by sinc function and an adjustable parameter is just a TDOA. Although there is not the ambiguity of phase difference in this procedure, an appropriate TDOA has to be searched using any optimization because the TDOA takes a real value. This falls into a non-linear optimization problem and there are many local minima in the search space therefore, a local minimum stagnation often occurs when applying a normal steepest decent algorithm for the search. In the proposed method, TDOA is estimated by introduction an avoidance method of local minimum stagnation. The validity of the proposed method is shown from several experimental results.

本誌: 電気学会論文誌C（電子・情報・システム部門誌） Vol.144 No.2 （2024） 特集：ディジタル信号処理の基礎と応用

本誌掲載ページ: 73-79 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejeiss/144/2/144_73/_article/-char/ja/