Dynamic Sliding Window Width Selection Strategies for Rate-Distortion Optimal Vertex-Based Shape Coding Algorithms

Sohel, F. A.; Karmakar, G. C. and Dooley, L. S. (2006). Dynamic Sliding Window Width Selection Strategies for Rate-Distortion Optimal Vertex-Based Shape Coding Algorithms. In: IEEE International Conference on Signal Processing (ICSP'06), 14-19 May 2006, Beijing.

DOI: https://doi.org/10.1109/ICOSP.2006.345628

URL: http://ieeexplore.ieee.org/search/srchabstract.jsp...

Abstract

Vertex-based operational-rate-distortion (ORD) shape coding algorithms frequently use a sliding window (SW) to both avoid trivial solutions and improve computational efficiency, with the choice of the SW-width enabling the encoder to trade between bit-rate and computational complexity. This paper presents some new strategies for dynamically determining the SW-width adaptive within the rate-distortion constraints. From a constrained bit-rate perspective, this is achieved by estimating the maximum number of significant points feasible for a prescribed bit-rate, while for an admissible distortion, an additional rate trade-off parameter selects the SW-width, with the optimal width determined for an encoder constrained by both rate and distortion. An efficient shape-adaptive technique is also presented that exploits the curvature of a shape to compute the SW-width. Experimental results confirm that the SW-width determined using the proposed strategies can be seamlessly and efficiently embedded into the ORD shape coding framework

Viewing alternatives

Metrics

Public Attention

Altmetrics from Altmetric

Number of Citations

Citations from Dimensions

Item Actions

Export

About

Recommendations