Scalable shape encoding is an important requirement of highly scalable object-based video coding. In this paper, a new scalable vertex-based shape coding scheme is proposed that uses temporal prediction. During shape coding of a video object, the object shape in the first frame is scalable intra-coded using the method described in [1]. For scalable shape coding of subsequent frames, temporal prediction is conducted during the coding of coarser layers. Contour matching in the curvature scale

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... e domain is conducted in order to get higher matching accuracy. Experimental results show that the proposed scalable shape coding scheme can achieve better R-D performance than existing predictive shape coding methods [2] and CAE in .