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MPEG-4 and rate-distortion-based shape-coding techniques
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DOI：10.1109/5.687833.png)
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Abstract
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In this paper, 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, studies 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. Last, conclusions are drawn.
Keywords:
boundary coding
MPEG-4
rate-distortion theory
shape coding
video coding
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