Processing dual tone multi-frequency signals for use with a natural language understanding system
US6845356B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 31, 2001 |
| Grant date | Jan 18, 2005 |
| Priority date | — |
| Expiry date | Jan 30, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L15/18
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for processing dual tone multi-frequency signals for use with a natural language understanding system can include several steps. The step of determining whether a audio input signal is a dual tone multi-frequency signal or a human speech signal can be included. If the audio input signal is determined to be a dual tone multi-frequency signal, the audio input signal can be converted to at least one text equivalent. Also, the step of providing the at least one text equivalent to a natural language understanding system can be included. The natural language understanding system can determine a meaning from the text equivalent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.