Review of standard traditional distortion metrics and a need for perceptual distortion metric at a (sub) macroblock level

Joshi, Yetish and Shah, Purav and Loo, Jonathan and Rahman, Shahedur (2013) Review of standard traditional distortion metrics and a need for perceptual distortion metric at a (sub) macroblock level. In: IEEE International Symposium on Broadband Multimedia Systems and Broadcasting (IEEE BMSB), 4-7 June 2013, Brunel University, Uxbridge, UK.

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Abstract

Within a video encoder the distortion metric performs an Image Quality Assessment (IQA). However, to exploit perceptual redundancy to lower the convex hull of the Rate-
Distortion (R-D) curve, a Perceptual Distortion Metric (PDM)
modelling of the Human Visual System (HVS) should be used. Since block-based video encoders like H.264/AVC operate at the Sub-Macroblock (Sub-MB) level, there exists a need to produce a locally operating PDM. A locally operating PDM must meet the requirements of Standard Traditional Distortion Metrics (STDMs), in that it must satisfy the Triangle Equality Rule. Hence, this paper presents a review of STDMs of SSE, SAD and SATD against the perceptual IQA of Structural Similarity (SSIM) at the Sub-MB level. Furthermore, this paper illustrates the Universal Bounded Region (UBR) by block size that supports the triangle equality rule within the Sub-MB level, between SSIM and STDMs like SATD at the prediction stage.

Item Type: Conference or Workshop Item (Paper)
Research Areas: A. > School of Science and Technology > Computer Science > SensoLab group
A. > School of Science and Technology > Computer and Communications Engineering
Item ID: 10730
Useful Links:
Depositing User: Purav Shah
Date Deposited: 17 Jun 2013 08:08
Last Modified: 05 Jul 2017 11:51
URI: http://eprints.mdx.ac.uk/id/eprint/10730

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