Title:
ADDED AND SUPERIMPOSED NOISE ADAPTING METHOD WHEN CONDUCTING AUTOMATIC VOICE RECOGNITION USING CONVERSION MATRIX
Document Type and Number:
Japanese Patent JP2002049388
Kind Code:
A
Abstract:
To provide a noise adaptive system and its method in which a noise adaptation is performed in a voice recognition system.
The method includes a step in which a reference model (70) is generated based on training voice signals and the model (70) is compensated for added noise in a cepstrum region. The model (70) is also compensated for superimposed noise in the cepstrum region. In one exection form, superimposed noise is compensated for by estimating a superimposed bias between the model (70) and a target voice signal (79). The bias is converted by a channel adaptive matrix (88) and the converted superimposed bias is added to the model (70) in the cepstrum region.
Inventors:
CERISARA CHRISTOPHE
RIGAZIO LUCA
BOMEN ROBERT
JUNQUA JEAN-CLAUDE
RIGAZIO LUCA
BOMEN ROBERT
JUNQUA JEAN-CLAUDE
Application Number:
JP2001230183A
Publication Date:
February 15, 2002
Filing Date:
July 30, 2001
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
G10L15/14; G10L15/20; G10L21/0216; (IPC1-7): G10L15/06; G10L15/14; G10L15/20; G10L21/02
Attorney, Agent or Firm:
Takashi Watanabe (2 outside)