서지주요정보
Performance improvement of filterbank ICA with sound localization = 음원탐지를 이용한 필터뱅크 독립요소분석 기법의 성능향상
서명 / 저자 Performance improvement of filterbank ICA with sound localization = 음원탐지를 이용한 필터뱅크 독립요소분석 기법의 성능향상 / Chandra Shekhar Dhir.
저자명 Dhir, Chandra Shekhar ; 디르, 찬드라
발행사항 [대전 : 한국과학기술원, 2006].
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등록번호

8017378

소장위치/청구기호

학술문화관(문화관) 보존서고

MBiS 06007

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초록정보

In an attempt to improve the performance of ICA based blind source separation methods, the stationarity of the mixing environment is exploited. The similarity between the structural modality of filterbank ICA and human auditory pathway is utilized to develop a binaural system for sound localization and speech enhancement. The developed system includes a filterbank and blind signal separation is conducted on each filtered mixtures which may be decimated for reducing computational complexity. The filterbank architecture is also advantageous to estimate sound directions from noisy multi-source mixtures. The estimated time delays are collected at each subband and are utilized to localize the multiple sources from convolved mixtures. The source arrival time differences are imposed as an additional constraint on filterbankbased ICA approaches. Initialization of subband separation network according to the source directions in localized space results in faster convergence. Though initialization results in faster convergence, no improvement is observed in the final separation performance. However, directional constraint along with initialization on the separation network provides robust behavior to the learning of subband demixing filters even if the mixtures are corrupted with additive noise. Constraining the subband demixing network to the location of source signals in constant mixing environment results in faster convergence and effective permutation correction for noisy observations, moreover, final performance improvement is also observed.

서지기타정보

서지기타정보
청구기호 {MBiS 06007
형태사항 ix, 69 p. : 삽도 ; 26 cm
언어 영어
일반주기 저자명의 한글표기 : 찬드라 디르
지도교수의 영문표기 : Soo-Young Lee
지도교수의 한글표기 : 이수영
학위논문 학위논문(석사) - 한국과학기술원 : 바이오시스템학과,
서지주기 Reference : p. 66-69
주제 ICA
Filterbank
Blind Source Separation
Arrival Time Difference
독립요소분석
필터뱅크
암묵신호분리
음원의 도착시간차이
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