Multiplex communications – Data flow congestion prevention or control
Reexamination Certificate
2005-05-17
2005-05-17
Sam, Phirin (Department: 2661)
Multiplex communications
Data flow congestion prevention or control
C370S235000, C348S025000
Reexamination Certificate
active
06894973
ABSTRACT:
An apparatus and a smethod providing fair bandwidth sharing by adjusting video image quality in a data packet network comprises a network load detection means for detecting a network load and a video encoding control circuit. The network load has an uncongested state, a loaded state, and a congested state. The video encoding control circuit adjusts a video quality to a target video quality, by increasing the video quality when the network load is in the uncongested state and decreasing the video quality when the network load is in the congested state. The video quality is determined as a peak mean squared error between an uncompressed image and a corresponding decoded image. The network load is detected by using a forward explicit congestion notification bit.
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AT&T Corp.
Sam Phirin
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