DTMF tone detection and suppression with application to computer telephony over packet switched networks
US6396851B1 · kind B1 · utility
1Cited by
4References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 9, 2001 |
| Grant date | May 28, 2002 |
| Priority date | — |
| Expiry date | Mar 9, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M7/1295
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method of facilitating telephony communications over a packet-switched network includes detecting signaling tones in an audio stream and blocking them from the stream in response to the detecting. After the blocking, the audio stream is sent over an undependable channel in the packet-switched network. The detected signaling tones can be sent over a dependable channel instead of the undependable audio channel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.