06404745 is referenced by 47 patents.

A centralized multipoint conferencing arrangement uses a combination of multicast and unicast transmissions that is bandwidth efficient. A method of conferencing includes transmitting multimedia streams from endpoint terminals to a central resource such as a multipoint control unit (MCU) using unicast transmission. The multimedia streams are processed in the MCU and transmitted back to the endpoint terminals using multicast transmission. In addition, the MCU transmits other multimedia streams to selected endpoint terminals using unicast transmission. At the selected endpoint terminals, processing of the multimedia streams is inhibited in favor of processing the other multimedia streams.

Title
Method and apparatus for centralized multipoint conferencing in a packet network
Application Number
9/373873
Publication Number
6404745 (B1)
Application Date
August 12, 1999
Publication Date
June 11, 2002
Inventor
George W Kajos
Westboro
MA, US
John E O&apos Neil
Framingham
MA, US
Agent
Hamilton Brook Smith & Reynolds P c
US
Assignee
Ezenia&excl
MA, US
IPC
G04L 12/18
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