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122 IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS FOR VIDEO TECHNOLOGY, VOL. 14, NO. 1, JANUARY 2004 An Enhanced Two-Stage Multiple Description Video Coder With Drift Reduction
 

Summary: 122 IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS FOR VIDEO TECHNOLOGY, VOL. 14, NO. 1, JANUARY 2004
An Enhanced Two-Stage Multiple Description Video Coder With Drift Reduction
Yen-Chi Lee, Student Member, IEEE, Yucel Altunbasak, Senior Member, IEEE, and
Russell M. Mersereau, Fellow, IEEE
Abstract--Multiple description coding (MDC) is a source coding
technique that exploits path diversity to increase the robustness of
transmitting a compressed signal over error-prone channels. How-
ever, the application of MDC to video coding is still problematic
because a prediction mismatch problem, called drift, may occur at
the decoder when one description is lost. In the literature, it has
been shown that drift can be effectively prevented by encoding this
prediction mismatch and sending it as side information in a three-
prediction-loop structure. However, this side information is totally
redundant when both descriptions are received. In this paper, we
propose a very simple, but efficient two-stage MDC in the central
prediction loop based on Reibman's three-prediction-loop struc-
ture. In our design, an additional multiple description scalar quan-
tizer is introduced into the central prediction loop. The encoding
of the side information is modified in such a way that it can be
used to improve the video quality when no drift occurs, but still

  

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

 

Collections: Engineering