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2012 Vol.31, Issue 5 Preview Page
Audio Source Separation Method based on Beamspace-domain Multichannel Non-negative Matrix Factorization, Part II: A Study on the Beamspace Transform Algorithms

빔공간-영역 다채널 비음수 행렬 분해 알고리즘을 이용한 음원 분리 기법 Part II: 빔공간-변환 기법에 대한 고찰

Seokjin Lee1*
,
Sang Ha Park2
,
Koeng-Mo Sung3
이 석진1*
,
박 상하2
,
성 굉모3
1서울대학교 전기컴퓨터공학부 뉴미디어통신공동연구소 음향공학연구실
*Corresponding Author
31 July 2012. pp. 332-339
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Abstract

Beamspace transform algorithm transforms spatial-domain data - such as x, y, z dimension - into incidence-angle-domain data, which is called beamspace-domain data. The beamspace transform method is generally used in source localization and tracking, and adaptive beamforming problem. When the beamspace transform method is used in multichannel audio source separation, the inverse beamspace transform is also important because the source image have to be reconstructed. This paper studies the beamspace transform and inverse transform algorithms for multichannel audio source separation system, especially for the beamspace-domain multichannel NMF algorithm.

Keywords
Multichannel audio source separation
Non-negative matrix factorization (NMF)
Beamspace-transform.

빔공간 변환(beamspace transform) 기법은 공간 영역의 신호를 입사각 혹은 그 사인함수의 영역으로 변환하는 기법으로, MUSIC과 같은 음원 정위 및 추적(source localization and tracking) 문제나 적응 빔형성(adaptive beamforming)과 같은 문제에서 많이 사용되는 기법이다. 다채널 음원 분리 기법에 사용될 때에는, 음원의 정보 뿐만 아니라 해당 음원의 이미지(image)를 재구성하여야 하므로 역변환 기법 또한 중요하다. 본 논문에서는 멀티 채널 음원 분리 기법을 위한 빔공간 변환 기법과 그 역변환 기법에 대하여 고찰하였으며, 특히 빔공간-영역 다채널 비음수 행렬 분해 기법에 적용되었을 때 그 성능에 미치는 영향을 중점적으로 살펴보았다.

키워드
다채널 음원 분리
비음수 행렬 분해
빔공간 변환
References
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Information
  • Publisher :The Acoustical Society of Korea
  • Publisher(Ko) :한국음향학회
  • Journal Title :The Journal of the Acoustical Society of Korea
  • Journal Title(Ko) :한국음향학회지
  • Volume : 31
  • No :5
  • Pages :332-339
  • Received Date : 2012-02-27
  • Revised Date : 2012-04-19
  • Accepted Date : 2012-05-16
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