System and method for obtaining reliable speech recognition...

Details System and method for obtaining reliable speech recognition... System and method for obtaining reliable speech recognition...

2007-08-21

2007-08-21

Azad, Abul K. (Department: 2626)

Data processing: speech signal processing, linguistics, language

Speech signal processing

Recognition

C704S226000

Reexamination Certificate

active

10445923

ABSTRACT:
The present invention provides a method and a system for determining reliable speech recognition coefficients in noisy environment, which can increase the recognition rate in a noisy environment, such as an in-car environment. The present invention utilizes the feature that most of the energy of in-car noise is concentrated in the low frequency band. Therefore, the input speech signal is filtered to remove the signal at the frequency range in which the noise energy is concentrated. Then, the energy contour of the speech signal is calculated, so as to determine the related speech recognition coefficients. Accordingly, the influence caused by the noise can be reduced, and the recognition rate for the noisy speech can be improved.

REFERENCES:
patent: 6009391 (1999-12-01), Asghar et al.
patent: 6633843 (2003-10-01), Gong
patent: 2002/0062211 (2002-05-01), Li et al.
patent: 2003/0115054 (2003-06-01), Iso-Sipila

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