24/06/2005 - Controller General of Patents, Designs, and Trade Marks

(21) Application No. IN/PCT/2000/211/DEL A (22) Date of filing of Application: 20/09/2000
(54) Title of the invention: “GENERATOR OF AN ADAPTED SPEECH RECOGNIZER.”
(51) International Classification 7 : G 01L 5/06
(30) Priority Data :
(31) Document No.: 60/082,656, 09/066,113
(32) Date : 22/04/1998, 23/04/1998
(33) Name of convention country : U.S.A.
(66) Filed U/s 5(2) : NIL
(61) Patent of addition to application No. : NA
(62) Filed on : NA
(63) Divisional to Application No. :NIL
(64) Filed on : NA
Total No. of Pages: 25
(57) Abstract:
(71) Name of the applicant:
INTERNATIONAL BUSINESS
MACHINES CORPORATION.
Address of the Applicant:
Armonk, New York 10504, U.S.A.
(72) Name of the Inventor:
FISCHER VOLKER
GAO YUQING
PICHENY MICHAEL A.
FUNZMANN SIEGFRIED
The invention relates to a generator and a method for generating an adapted speaker independent
speech recognizer.
The generator of an adapted speech recognizer is being based upon a base speech recognizer of an
arbitrary base language. The generator also comprises an additional speech data corpus used for
generation of said adapted speech recognizer. Said additional speech data corpus comprises a
collection of domain specific speech data and/or dialect specific speech data. Said generator
comprises reestimation means for reestimating language or domain specific acoustic model
parameters of the base speech recognizer by a speaker adaption technique. Said additional speech
data corpus is exploited by said reestimation means for generating the adapted speech recognizer.
The invention proposes smoothing means for smoothing means for smoothing the reestimated
acoustic model parameters. A beneficial range for the smoothing factor of a Bayesian smoothing
is given.
It is further suggested to iterate the adaption process.
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