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Proceedings Paper

Performance comparison of loop filtering in generic MC/DPCM/DCT video coding
Author(s): Michael Yuen; Hong Ren Wu
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Paper Abstract

This paper presents a performance comparison of different loop filtering techniques in a generic hybrid video coding algorithm. This study will compare the performance of the filtering techniques by integrating each of the loop filters separately into a MPEG-1 compliant codec, and coding a number of video sequences at various bit-rates and motion compensation (MC) accuracies. The performance of the filters will be assessed in terms of the energy of the displaced frame difference. Comparisons are conducted between four filtering techniques: (1) the 1:2:1 loop filter described in ITU Recommendation H.261; (2) an MC-accuracy dependent 3-tap filter, whose tap weights are based upon a first-order Markov model of the source; (3) a spatially-adaptive filter for the blocking-effect based on the theory of Projections Onto Convex Sets (POCS); and (4) an anisotropic filter for the reduction of the blocking-effect. Our results will examine the effect that traditional low-pass loop filters have on MC prediction quality, and compare this to a POCS-based loop filter. The filtering of only the blocking-effect will also provide an indication of the contribution that the blocking-effect has on the overall high- frequency distortions that are reduced by the low-pass loop filters.

Paper Details

Date Published: 22 March 1996
PDF: 10 pages
Proc. SPIE 2668, Digital Video Compression: Algorithms and Technologies 1996, (22 March 1996); doi: 10.1117/12.235441
Show Author Affiliations
Michael Yuen, Monash Univ. (Australia)
Hong Ren Wu, Monash Univ. (Australia)


Published in SPIE Proceedings Vol. 2668:
Digital Video Compression: Algorithms and Technologies 1996
Vasudev Bhaskaran; Frans Sijstermans; Sethuraman Panchanathan, Editor(s)

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