Reduction of latency in video distribution networks using adaptive bit rates
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United States of America Patent
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Dec 1, 2015
Grant Date -
Oct 11, 2012
app pub date -
Apr 3, 2012
filing date -
Apr 7, 2011
priority date (Note) -
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Abstract
Systems and methods are provided for reducing and controlling playback latency in an unmanaged, buffered data network. A delay cost function is determined, the function representing the effect of playback latency on end user experience. An encoder transmits audiovisual data through the network to a client device. Network latency is measured, and the delay cost function is evaluated to establish an encoding bitrate for the encoder. The encoding of the audiovisual data is altered in response to dynamic network conditions, thereby controlling end-to-end playback latency of the system, which is represented by the playout length of data buffered between the encoder and the client device.
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