Title:
改良型独立成分分析を使用する音声処理ためのシステムおよび方法
Document Type and Number:
Japanese Patent JP2006510069
Kind Code:
A
Abstract:
A system and method for separating a mixture of audio signal into desired audio signals ( 430 ) (e.g., speech) and a noise sign ( 440 ) is disclosed. Microphones ( 310, 320 ) are positioned to receive the mixed audio signals, and an independent component analysis (ICA) processes ( 212 ) the sound mixture using stability constraints. The ICA process ( 508 ) uses predefined characteristics of the desired speech signal to identify and isolate a target sound signal ( 430 ). Filter coefficients are adapted with a learning rule and filter weight update dynamics are stabilized to assist convergence to a stable separated ICA signal result. The separated signals may be peripherally-processed to further reduce noise effects using post-processing ( 214 ) and pre-processing ( 220, 230 ) techniques and information. The proposed system is designed and easily adaptable for implementation on DSP units or CPUs in audio communication hardware environments.
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Inventors:
Eric, Bisa
Lee, Choi Won
Lee, Choi Won
Application Number:
JP2005511772A
Publication Date:
March 23, 2006
Filing Date:
December 11, 2003
Export Citation:
Assignee:
Softmax, ink
International Classes:
G10L21/02; H03H21/00
Domestic Patent References:
| JP2000097758A | 2000-04-07 | |||
| JP2001051689A | 2001-02-23 | |||
| JPH10253385A | 1998-09-25 | |||
| JPH09252235A | 1997-09-22 |
Foreign References:
| WO2002061732A1 | 2002-08-08 |
Attorney, Agent or Firm:
Takenori Hiroe
Takanobu Takekawa
High Shinichi Ara
Nakamura Shigenori
Tsutomu Nishio
Takanobu Takekawa
High Shinichi Ara
Nakamura Shigenori
Tsutomu Nishio