Voice activity detection and silence suppression in a packet network
US7272552B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 27, 2002 |
| Grant date | Sep 18, 2007 |
| Priority date | — |
| Expiry date | Mar 13, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J3/17
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present invention is a system and method that improves upon voice activity detection by packetizing actual noise signals, typically background noise. In accordance with the present invention an access network receives an input voice signal (including noise) and converts the input voice signal into a packetized voice signal. The packetized voice signal is transmitted via a network to an egress network. The egress network receives the packetized voice signal, converts the packetized voice signal into an output voice signal, and outputs the output voice signal. The egress network also extracts and stores noise packets from the received packetized voice signal and converts the packetized noise signal into an output noise signal. When the access network ceases to receive the input voice signal while the call is still ongoing, the access network instructs the egress network to continually output the output noise signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.