Separation of Sound Sources Propagated in the Same Direction(Blind Source Separation, <Special Section>Multi-channel Acoustic Signal Processing)

• ANDO Akio

  NHK

• IWAKI Masakazu

  NHK

• ONO Kazuho

  NHK

• KUROZUMI Koichi

  NHK

Abstract

This paper describes a method for separating a target sound from other noise arriving in a single direction when the target cannot, therefore, be separated by directivity control. Microphones are arranged in a line toward the sources to form null sensitivity points at given distances from the microphones. The null points exclude non-target sound sources on the basis of weighting coefficients for microphone outputs determined by blind source separation. The separation problem is thereby simplified to instantaneous separation by adjustment of the time-delays for microphone outputs. The system uses a direct (i.e. non-iterative) algorithm for blind separation based on second-order statistics, assuming that all sources are non-stationary signals. Simulations show that the 2-microphone system can separate a target sound with separability of more than 40dB for the 2-source problem, and 25dB for the 3-source problem when the other sources are adjacent.

Journal

• IEICE transactions on fundamentals of electronics, communications and computer sciences

  IEICE transactions on fundamentals of electronics, communications and computer sciences 88 (7), 1665-1672, 2005-07-01

  The Institute of Electronics, Information and Communication Engineers

Keywords

• blind separation of signals
• independent component analysis
• microphone system
• direct algorithm
• decorrelation

Details

• CRID: 1573950400000252032
• NII Article ID: 10016780838
• NII Book ID: AA10826239
• ISSN: 09168508
• Text Lang: en
• Data Source:
  • CiNii Articles