Voice and data exchange over a packet based network with echo cancellation
US8515054B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 10, 2010 |
| Grant date | Aug 20, 2013 |
| Priority date | — |
| Expiry date | Jul 9, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q1/45
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A signal processing system which discriminates between voice signals and data signals modulated by a voiceband carrier. The signal processing system includes a voice exchange, a data exchange and a call discriminator. The voice exchange is capable of exchanging voice signals between a switched circuit network and a packet based network. The signal processing system also includes a data exchange capable of exchanging data signals modulated by a voiceband carrier on the switched circuit network with unmodulated data signal packets on the packet based network. The data exchange is performed by demodulating data signals from the switched circuit network for transmission on the packet based network, and modulating data signal packets from the packet based network for transmission on the switched circuit network. The call discriminator is used to selectively enable the voice exchange and data exchange.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.