Title:
雑音環境における音声信号の着実な分離
Document Type and Number:
Japanese Patent JP2009503568
Kind Code:
A
Abstract:
A method for improving the quality of a speech signal extracted from a noisy acoustic environment is provided. In one approach, a signal separation process is associated with a voice activity detector. The voice activity detector is a two-channel detector, which enables a particularly robust and accurate detection of voice activity. When speech is detected, the voice activity detector generates a control signal. The control signal is used to activate, adjust, or control signal separation processes or post-processing operations to improve the quality of the resulting speech signal. In another approach, a signal separation process is provided as a learning stage and an output stage. The learning stage aggressively adjusts to current acoustic conditions, and passes coefficients to the output stage. The output stage adapts more slowly, and generates a speech-content signal and a noise dominant signal. When the learning stage becomes unstable, only the learning stage is reset, allowing the output stage to continue outputting a high quality speech signal.
Inventors:
Eric, Bisa
Tohman, Jeremy
Chan, Quok Leong
Tohman, Jeremy
Chan, Quok Leong
Application Number:
JP2008523036A
Publication Date:
January 29, 2009
Filing Date:
July 21, 2006
Export Citation:
Assignee:
Softmax, Inc.
International Classes:
G10L21/02; G10L11/02; G10L25/93
Domestic Patent References:
| JPH10313498A | 1998-11-24 | |||
| JPH0918291A | 1997-01-17 | |||
| JP2003280696A | 2003-10-02 | |||
| JPH056193A | 1993-01-14 |
Attorney, Agent or Firm:
Hiroe Associates Patent Office