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IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS FOR VIDEO TECHNOLOGY, VOL. 15, NO. 8, AUGUST 2005 1007 Asynchronous Rate Control for Multi-Object Videos
 

Summary: IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS FOR VIDEO TECHNOLOGY, VOL. 15, NO. 8, AUGUST 2005 1007
Asynchronous Rate Control for Multi-Object Videos
Yu Sun, Member, IEEE, and Ishfaq Ahmad, Senior Member, IEEE
Abstract--Object-based coding can potentially achieve a higher
degree of compression and better visual quality. The objects in
a scene are not always synchronous, that is, they have different
temporal resolutions. In some applications, it is more efficient
to transmit asynchronous objects with different temporal rates
so as to achieve a better tradeoff between temporal and spatial
resolutions. This requires to balance the qualities of individual ob-
jects while ensuring an overall visual quality with a given bit rate.
This paper proposes a rate control algorithm for multiple video
object encoding, which is suitable for both synchronous and asyn-
chronous transmissions. The algorithm aims to maximize scene
quality with an accurate bit rate, while efficiently handling buffer
fullness. Using an efficient bit allocation strategy, the algorithm
achieves accurate target bit rates, provides good coding quality,
and decreases buffer overflow/underflow. The proposed algorithm
also allows flexible priority adjustment among multiple objects
to ensure overall better visual perception. Designed primarily

  

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

 

Collections: Computer Technologies and Information Sciences