MPEG-4 and rate-distortion-based shape-coding techniques |
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Authors: | Katsaggelos AK Kondi LP Meier FW Ostermann J Schuster GM |
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Affiliation: | Dept. of Electr. & Comput. Eng., Northwestern Univ., Evanston, IL; |
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Abstract: | We address the problem of the efficient encoding of object boundaries. This problem is becoming increasingly important in applications such as content-based storage and retrieval, studio and television postproduction, and mobile multimedia applications. The MPEG-4 visual standard will allow the transmission of arbitrarily shaped video objects. The techniques developed for shape coding within the MPEG-4 standardization effort are described and compared first. A framework for the representation of shapes using their contours is presented next. Such representations are achieved using curves of various orders, and they are optimal in the rate-distortion sense. Finally, conclusions are drawn |
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