Technical Program

Paper Detail

Session:Multimedia Coding and Segmentation
Time:Tuesday, May 25, 10:24 - 10:42
Presentation: Lecture
Topic: Multimedia Systems and Applications: Multimedia Coding and Segmentation
Authors: Ming-Chieh Chi; Nation Dong-Hwa University 
 Mei-Juan Chen; Nation Dong-Hwa University 
 Ching-Ting Hsu; Nation Dong-Hwa University 
Abstract: This paper proposes an Region-of-Interest(ROI) video coding algorithm based on H.263+. The ability to give higher priority to ROI is the emerging functionality for nowadays video coding. In most videoconferencing and videophone, most existing compression schemes treat the entire image uniformly. However, the background is much less critical than the foreground, i.e. human face, moving objects, etc., for communication. A region-based video codec based on the H.263+ with the option mode of modified quantization is set up. A new algorithm based on TMN8 utilizes fuzzy logic control method to give adaptive weighted factor to each macroblock(MB) and allocate different bits to each MB according to the complexity and the variance variation in rate-and-distortion model. From experimental results, the proposed method can significantly improve the quality at ROI and multiple ROI functionality also has been implemented. Our method is suitable for real time videoconferencing.

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