Patents Assigned to RadiSys Canada ULC
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Publication number: 20130250817Abstract: 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 certain embodiments, 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.Type: ApplicationFiled: May 16, 2013Publication date: September 26, 2013Applicant: RadiSys Canada ULCInventors: Adnan Saleem, Neil Gunn, Yong Xin, Jagtar Gill, Alvin Chubbs, Tim Woinoski
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Patent number: 8477661Abstract: Systems and methods are provided for a distributed conferencing service through an internet protocol (IP) network. A plurality of tributary mixers are configured communicate with a master mixer or a plurality of master mixers, at least one of which communicates through the IP network. Each tributary mixer is configured to join one or more respective participants to the distributed conference, generate a first mixed media stream by mixing a plurality of ingress media streams from the respective participants, and receive a second mixed media stream from the master mixer. The second mixed media stream includes media from at least one other participant joined to the distributed conference through another of the tributary mixers. Each tributary mixer also provides egress media streams to its respective participants based on a control signal from the master mixer.Type: GrantFiled: August 14, 2009Date of Patent: July 2, 2013Assignee: RadiSys Canada ULCInventors: Adnan Saleem, Neil M. Gunn, Timothy S. Woinoski, Yong Xin
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Patent number: 8446846Abstract: 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.Type: GrantFiled: January 31, 2008Date of Patent: May 21, 2013Assignee: Radisys Canada ULCInventors: Adnan Saleem, Neil Gunn, Yong Xin, Jagtar Gill, Alvin Chubbs, Tim Woinoski
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Publication number: 20120287769Abstract: System and methods provide acoustic echo monitoring and cancellation for real time media processing in an internet protocol (IP) media server in an IP network. An echo monitor is configured to selectively compare audio streams into and out of the IP media server through a selected port. The comparison determines an occurrence of an echo. An echo canceller in communication with the echo monitor is configured to respond to the determination by the echo monitor so as to remove the echo from at least one of the audio streams. A talk burst detector may be used to detect speech in at least one of the audio streams through the selected port. The echo monitor selectively compares the audio streams in response to a signal from the talk burst detector that indicates detection of speech.Type: ApplicationFiled: May 10, 2012Publication date: November 15, 2012Applicant: RADISYS CANADA ULCInventors: Adnan Saleem, Mohammed Aamir Husain, Timothy S. Woinoski, Neil M. Gunn
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Patent number: 8081191Abstract: In a media server for processing data packets, media server functions are implemented by a plurality of modules categorized by real-time response requirements.Type: GrantFiled: September 25, 2008Date of Patent: December 20, 2011Assignee: RadiSys Canada ULCInventors: Adnan Saleem, Alvin Chubbs, Neil Gunn, James Davidson, Serguei Smirnov
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Publication number: 20110038281Abstract: Systems and methods are provided for a distributed conferencing service through an internet protocol (IP) network. A plurality of tributary mixers are configured communicate with a master mixer or a plurality of master mixers, at least one of which communicates through the IP network. Each tributary mixer is configured to join one or more respective participants to the distributed conference, generate a first mixed media stream by mixing a plurality of ingress media streams from the respective participants, and receive a second mixed media stream from the master mixer. The second mixed media stream includes media from at least one other participant joined to the distributed conference through another of the tributary mixers. Each tributary mixer also provides egress media streams to its respective participants based on a control signal from the master mixer.Type: ApplicationFiled: August 14, 2009Publication date: February 17, 2011Applicant: RADISYS CANADA ULCInventors: Adnan Saleem, Neil M. Gunn, Timothy S. Woinoski, Yong Xin