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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