Technical Program

Paper Detail

Paper:SPCOM-P3.7
Session:Joint Source/Channel Coding and Quantization
Time:Wednesday, May 19, 09:30 - 11:30
Presentation: Poster
Topic: Signal Processing for Communications: Joint Source-Channel Coding
Title: ROBUST RECONSTRUCTION OF MOTION VECTORS USING FRAME EXPANSION
Authors: Chang-Ming Lee; LSS-Supelec-Universite Paris-Sud 
 Michel Kieffer; LSS-Supelec-Universite Paris-Sud 
 Pierre Duhamel; LSS-Supelec-Universite Paris-Sud 
Abstract: Transmitting video streams on channels impaired with transmission errors is a very demanding task, mainly when images are predicted from previous ones. In this case, errors on motion vectors can be very harmful. In order to overcome this problem, this paper presents a modified H263+ scheme without motion vector transmission. This is obtained by re-estimating these motion vectors at the receiver, based on a properties of frame expansions. This procedure is obtained at the cost of an increased bit rate, but shows that robust (and efficient) transmission can indeed be obtained in conjunction with image prediction.
 
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