FIXED TEXT SPEAKER VERIFICATION METHOD AND APPARATUS
Assignee
TEXAS INSTRUMENTS INCORPORATED
Filed
Apr 3, 1987
Granted
Aug 20, 1996
Location
DALLAS TX US
Abstract
Speaker verification is performed by computing principal components of a fixed text statement comprising a speaker identification code and a two-word phrase, and principal spectral components of a random word phrase. A multi-phrase strategy is utilized in access control to allow successive verification attempts in a single session, if the speaker fails initial attempts. Based upon a verification attempt, the system produces a verification score which is compared with a threshold value. On successive attempts, the criterion for acceptance is changed, and one of a number of criteria must be satisfied for acceptance in subsequent attempts. A speaker normalization function can also be invoked to modify the verification score of persons enrolled with the system who inherently produce scores which result in denial of access. Accuracy of the verification system is enhanced by updating the reference template which then more accurately symbolizes the person's speech signature.
Source: Google Patents
35 USC §181 Secrecy Order
Imposed
Feb 2, 1988
Rescinded
Nov 30, 1993
Duration
5 years, 10 months
Inventor
- 1JAYANT M. NAIK
Record Details
- Patent number
- US 5548647
- Application
- 07034315
- Aerospace match
- Yes
- Dataset source
- 35 USC §181 SO records
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