Speech recognition using multiple recognizers (selectively) applied to the same input sample
US6122613A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 30, 1997 |
| Grant date | Sep 19, 2000 |
| Priority date | — |
| Expiry date | Jan 30, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L15/22
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A speech sample is recognized with a computer system by processing the speech sample with at least two speech recognizers, each of which has a different performance characteristic. One speech recognizer may be a large-vocabulary, continuous speech recognizer optimized for real-time responsiveness and another speech recognizer may be an offline recognizer optimized for high accuracy. The speech content of the sample is recognized based on processing results from the speech recognizers. The speaker is provided with a real-time, yet potentially error-laden, text display corresponding to the speech sample while, subsequently, a human transcriptionist may use recognition results from multiple recognizers to produce an essentially error-free transcription. The performance characteristics of the recognizers may be based on style or subject matter, and the recognizers may operate serially or in parallel. Sets of candidates produced by the two recognizers may be combined by merging the scores to generate a combined set of candidates that corresponds to the union of the two sets. Offline processing may be performed based on input from a human operator, cost, processing times, confidence leve…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.