The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 21, 2013
Filed:
Jan. 31, 2008
Adnan Saleem, Surrey, CA;
Neil Gunn, Coquitlam, CA;
Yong Xin, Coquitlam, CA;
Jagtar Gill, Surrey, CA;
Alvin Chubbs, Vancouver, CA;
Tim Woinoski, Coquitlam, CA;
Adnan Saleem, Surrey, CA;
Neil Gunn, Coquitlam, CA;
Yong Xin, Coquitlam, CA;
Jagtar Gill, Surrey, CA;
Alvin Chubbs, Vancouver, CA;
Tim Woinoski, Coquitlam, CA;
Radisys Canada ULC, Burnaby BC, CA;
Abstract
In Voice-over-IP or like systems, audio mixers are used for implanting conferencing applications for IP networks. In such systems, a problem exists as how to pass through user signal events, such a DTMF digits, in-band as well as out-of-band telephony events (RFC 2833/4733) because they are not handled well in such systems. In accordance with the invention, a signalling event in incoming audio packets or user signalling event received out-of-band is detected at one of the inputs. A meta-data representation of the signal event is attached to the audio and passed through the mixer for regeneration, as in-band or out-of-band telephony events, on the other side of the mixer.