Technical Program

Paper Detail

Session:Multimedia Communication and Transmission
Time:Monday, May 24, 16:36 - 16:54
Presentation: Lecture
Topic: Multimedia Systems and Applications: Multimedia Communications and Transmission
Authors: Wen Nung Lie; National Chung Cheng University 
 Zhi-Wei Gao; National Chung Cheng University 
Abstract: This paper addresses the technique of error conceal-ment to recover the video quality at decoders under transmission errors. We proposed Kalman filtering as a post-processing technique to traditional boundary matching algorithm (BMA) which estimates the motion vector (MV) of a corrupted macroblcok by using boundary pixels of the top and bottom-adjacent MBs as the reference. Due to less information from boundary pixels, MVs estimated by using BMA are mostly inaccurate. Experiments show that by proper mathematical modeling, the Kalman filter is able to filter out the inherit noise so that the recovered MVs lead to a quality improvement of 0.4 dB ~ 0.72 dB for our test sequences.

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