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IEEE TRANSACTIONS ON MULTIMEDIA, VOL. 8, NO. 1, FEBRUARY 2006 1 Region-Based Rate Control and Bit Allocation
 

Summary: IEEE TRANSACTIONS ON MULTIMEDIA, VOL. 8, NO. 1, FEBRUARY 2006 1
Region-Based Rate Control and Bit Allocation
for Wireless Video Transmission
Yu Sun, Member, IEEE, Ishfaq Ahmad, Senior Member, IEEE, Dongdong Li, Student Member, IEEE, and
Ya-Qin Zhang, Fellow, IEEE
Abstract--In this paper, we propose a joint source-channel
region-based rate control algorithm for real-time video transmis-
sions over wireless systems. During the video transmission, the
channel throughput available to the video encoder in the wireless
systems is inherently variable, due to the retransmission of the
error packets using the automatic repeat request (ARQ) error con-
trol. The variable data rate of the wireless system is characterized
by the packet-level Gilbert two-state Markov Model, the param-
eters of which are extracted from the statistical properties of the
channel information obtained from the wireless channel simulator.
The proposed algorithm adopts a fast but effective block-based
segmentation method to extract the regions of interest. Unlike
traditional bit allocation methods used in the region/content-based
rate control, the algorithm exploits the most effective criteria
"coding qualities" as quantitative factors to directly control bit

  

Source: Ahmad, Ishfaq - Department of Computer Science and Engineering, University of Texas at Arlington

 

Collections: Computer Technologies and Information Sciences