Multiplex communications – Pathfinding or routing – Combined circuit switching and packet switching
Reexamination Certificate
2008-05-27
2008-05-27
Tran, Len (Department: 4183)
Multiplex communications
Pathfinding or routing
Combined circuit switching and packet switching
C370S356000, C370S261000, C707S793000
Reexamination Certificate
active
07379450
ABSTRACT:
A system, method, and computer program product for establishing multi-party VoIP conference audio calls in a distributed, peer-to-peer network where any number of nodes are able to arbitrarily and asynchronously start or stop producing audio output to be mixed into a single composite audio stream that is distributed to all nodes. A single distribution tree is used that has optimal communications characteristics to distribute the composite audio signal to all nodes. An audio mixing tree is established and maintained by adaptively and dynamically adding and merging intermediate mixing nodes operating between user nodes and the root of the single distribution tree. The intermediate mixing nodes and the root of the single distribution tree are all hosted, in an exemplary embodiment, on user nodes that are endpoints of the distribution tree.
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Gu Xiaohui
Shae Zon-Yin
Wen Zhen
Yu Philip S.
Fleit Kain Gibbons Gutman Bongini & Bianco P.L.
Giunta Jeffrey N.
International Business Machines - Corporation
Nguyen Phung-Hoang J
Tran Len
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