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Optimal Dynamic Rate Shaping for Compressed Video Streaming

Summary: Optimal Dynamic Rate Shaping
for Compressed Video Streaming
Minjung Kim and Yucel Altunbasak
School of Electrical and Computer Engineering
Georgia Institute of Technology
Atlanta, GA 30332-0250
Abstract. The available channel bandwidth may vary due to many
factors including network traffic congestion. Therefore, a video server
should be able to decide how to reduce the transmission rate so as to
maximize the signal quality at the receiver. The video encoder can scale
the spatial resolution, temporal resolution or SNR to decrease the rate.
In this paper, we study which option or which particular combination of
these three scalability options needs to be employed to maximize the per-
ceived signal quality for a given video sequence. The existing research in
this area primarily concentrates on down-conversion of MPEG video by
frame-dropping or by changing the quantization scale factor as opposed
to considering the full spectrum of scalability options.
1 Introduction
In recent years, the rapid growth in popularity of Internet applications has lead


Source: Altunbasak, Yucel - School of Electrical and Computer Engineering, Georgia Institute of Technology


Collections: Engineering