Method for direct recognition of encoded speech data
US6223157A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 7, 1998 |
| Grant date | Apr 24, 2001 |
| Priority date | — |
| Expiry date | May 7, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L15/02
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Digital Cellular telephony requires voice compression designed to minimize the bandwidth required for the digital cellular channel. The features used in speech recognition have similar components to those used in the vocoding process. The present invention provides a system that bypasses the de-compression or decoding phase of the vocoding and converts the digital cellular parameters directly into features that can be processed by a recognition engine. More specifically, the present invention provides a system and method for mapping a vocoded representation of parameters defining speech components, which in turn define a particular waveform, into a base feature type representation of parameters defining speech components (e.g. LPC parameters), which in turn define the same digital waveform.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.