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Adaptive playout for low latency video streaming

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3 Author(s)
Steinbach, E. ; Dept. of Electr. Eng., Stanford Univ., CA, USA ; Farber, N. ; Girod, B.

Network variations in video streaming require sufficient data to be prebuffered at the client prior to playout. This receiver buffer prevents the display process from starvation in case of network congestion. Prebuffering, however, is also responsible for the major part of the delay between requesting a media stream and playing it at the receiver. We show how adaptive media playout can be employed to reduce the delay introduced by the receiver buffer while preserving the same resilience against buffer underflow as in non-adaptive media playout. For adaptive media playout we adjust the playout speed of the media packets depending on the condition of the channel and the current client buffer fullness. We employ a two-state Markov channel model to analyze the buffer underflow-delay trade-off for our adaptive playout strategy and show that for typical parameters the average end-to-end delay can be reduced by 1 to 2 seconds

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Image Processing, 2001. Proceedings. 2001 International Conference on  (Volume:1 )

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