Method and apparatus for verification of speaker authentication
US7809561B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 28, 2007 |
| Grant date | Oct 5, 2010 |
| Priority date | — |
| Expiry date | Jul 1, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L17/24
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present invention provides a method and apparatus for verification of speaker authentication. A method for verification of speaker authentication, comprising: inputting an utterance containing a password that is spoken by a speaker; extracting an acoustic feature vector sequence from said inputted utterance; DTW-matching said extracted acoustic feature vector sequence and a speaker template enrolled by an enrolled speaker; calculating each of a plurality of local distances between said DTW-matched acoustic feature vector sequence and said speaker template; nonlinear-transforming said each local distance calculated to give more weights on small local distances; calculating a DTW-matching score based on said plurality of local distances nonlinear-transformed; and comparing said matching score with a predefined discriminating threshold to determine whether said inputted utterance is an utterance containing a password spoken by the enrolled speaker.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.