System for voice verification of telephone transactions
US5937381A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 10, 1996 |
| Grant date | Aug 10, 1999 |
| Priority date | — |
| Expiry date | Apr 10, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L17/24
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A system and a method is disclosed for verifying a voice of a user conducting a telephone transaction. The system and method includes a mechanism for prompting the user to speak in a limited vocabulary. A feature extractor converts the limited vocabulary into a plurality of speech frames. A pre-processor is coupled to the feature extractor for processing the plurality of speech frames to produce a plurality of processed frames. The processing includes frame selection, which eliminates each of the plurality of speech frames having an absence of words. A Viterbi decoder is also coupled to said feature extractor for assigning a frame label to each of the plurality of speech frames to produce a plurality of frame labels. The processed frames and frame labels are then combined to produce a voice model, which includes each of the plurality of frame labels that correspond to the number of plurality of processed frames. A mechanism is also provided for comparing the voice model with the claimant's voice model, derived during a previous enrollment session. The voice model also is compared with an alternate voice model set, derived during previous enrollment sessions. The identity claimed is…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.