Multiplex communications – Data flow congestion prevention or control – Control of data admission to the network
Reexamination Certificate
2006-02-17
2010-11-30
Wong, Warner (Department: 2471)
Multiplex communications
Data flow congestion prevention or control
Control of data admission to the network
C370S235000, C348S500000
Reexamination Certificate
active
07843818
ABSTRACT:
In order to minimize the delay of the video images viewed by a network conference attendee, an intelligent buffering process (IB process) selectively discards video frames from at least one point, and in an embodiment, many network points, such as at “in” and/or “out” buffers of clients, servers, routers, etc. Packets of video frame data arrive at a buffer, which can fill to a predetermined limit if the packets cannot be forwarded due to delays or slow connections. To forward the most current video images, old frames in the buffer are discarded rather than forwarded. In a particular embodiment, when the buffer is full, the next arriving delta frame packet is discarded. To avoid distortion, each subsequent delta frame is discarded until a new key frame eventually arrives. If the buffer is still full when the key frame arrives, the buffer is purged and the new key frame is added.
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Ben-Shachar Ido M.
Chu Lon-Chan
Collins Leonard Alan
Giloi Claus T.
Leichtling Ivan J.
Merchant & Gould P.C.
Microsoft Corporation
Wong Warner
LandOfFree
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