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A DRIFT-FREE MOTION-COMPENSATED PREDICTIVE ENCODING TECHNIQUE FOR MULTIPLE DESCRIPTION CODING
 

Summary: A DRIFT-FREE MOTION-COMPENSATED PREDICTIVE ENCODING TECHNIQUE FOR
MULTIPLE DESCRIPTION CODING
Yen-Chi Lee, Yucel Altunbasak, and Russell M. Mersereau
Center for Signal and Image Processing
Georgia Institute of Technology
Atlanta, GA, 30332-0250
ABSTRACT
Multiple description coding (MDC) is a source coding tech-
nique that exploits path diversity to increase the robustness of trans-
mitting a compressed signal over error-prone channels. However,
the application of MDC to video coding is still problematic be-
cause a prediction mismatch problem, called drift, may occur at
the decoder when one description is lost. In this paper, we pro-
pose a drift free motion-compensated predictive coding method
for multiple description scalar quantizers. The proposed method
maintains two more prediction loops at the encoder side to pro-
duce all possible predictions. Then, the two descriptions are gen-
erated from these two additional prediction loops in such a way
that the drift can be prevented when only one description is re-
ceived. By receiving both descriptions, the decoder can still com-

  

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

 

Collections: Engineering