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New dynamic enhancements to the Vertex-Based rate-distortion optimal shape coding framework
Journal article   Open access   Peer reviewed

New dynamic enhancements to the Vertex-Based rate-distortion optimal shape coding framework

F.A. Sohel, L.S. Dooley and G.C. Karmakar
IEEE Transactions on Circuits and Systems for Video Technology, Vol.17(10), pp.1408-1413
2007
DOI: https://doi.org/10.1109/TCSVT.2007.903788
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Abstract

Existing vertex-based operational rate-distortion (ORD) optimal shape coding algorithms use a vertex band around the shape boundary as the source of candidate control points (CP) usually in combination with a tolerance band (TB) and sliding window (SW) arrangement, as their distortion measuring technique. These algorithms however, employ a fixed vertex-band width irrespective of the shape and admissible distortion (AD), so the full bit-rate reduction potential is not fulfilled. Moreover, despite the causal impact of the SW-length upon both the bit-rate and computational-speed, there is no formal mechanism for determining the most suitable SW-length. This paper introduces the concept of a variable width admissible CP band and new adaptive SW-length selection strategy to address these issues. The presented quantitative and qualitative results analysis endorses the superior performance achieved by integrating these enhancements into the existing vertex-based ORD optimal algorithms.

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Citation topics
4 Electrical Engineering, Electronics & Computer Science
4.101 Security, Encryption & Encoding
4.101.178 Video Coding
Web Of Science research areas
Engineering, Electrical & Electronic
ESI research areas
Engineering
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