Portable acoustic interface for remote access to automatic speech/speaker recognition server
US5953700A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 11, 1997 |
| Grant date | Sep 14, 1999 |
| Priority date | — |
| Expiry date | Jun 11, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L15/30
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A portable acoustic signal (speech signal) preprocessing (SSP) device for accessing an automatic speech/speaker recognition (ASSR) server comprises a microphone for converting sound including speech, silence and background noise signals to analog signals; an analog signals to digital converter for converting the analog signals to digital signals; a digital signal processor (DSP) for generating feature vector data representing the digitized speech and silence/background noise, and for generating channel characterization signals; and an acoustic coupler for converting the feature vector data and the characterization signals to acoustic signals and coupling the acoustic signals to a communication channel to access the ASSR server to perform speech and speaker recognition at a remote location. The SSP device may also be configured to compress and encrypt data transmitted to the ASSR server via the DSP and encryption keys stored in a memory. The ASSR server receives the preprocessed acoustic signals to perform speech/speaker recognition by setting references, selecting appropriate decoding models and algorithms to decode the acoustic signals by modeling the channel transfer function fro…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.