Implementation and Optimization of an Enhanced PWD Metric for H.264/AVC on a TMS320C64 DSP

Authors:
A. Samet;A. Hachicha;M. A. Ayed;N. Masmoudi
Affiliations:
Electronics and Information Technology Laboratory, Sfax National Engineering School, Sfax, TUNISIA BP W 3038;Electronics and Information Technology Laboratory, Sfax National Engineering School, Sfax, TUNISIA BP W 3038;Electronics and Information Technology Laboratory, Sfax National Engineering School, Sfax, TUNISIA BP W 3038;Electronics and Information Technology Laboratory, Sfax National Engineering School, Sfax, TUNISIA BP W 3038
Venue:
Journal of Signal Processing Systems
Year:
2012

Citing 8
Cited 0

Digital Pictures: Representation and Compression

Digital Pictures: Representation and Compression
Image quality assessment: from error visibility to structural similarity

IEEE Transactions on Image Processing
A perceptually tuned subband image coder based on the measure of just-noticeable-distortion profile

IEEE Transactions on Circuits and Systems for Video Technology
Reduction of blocking artifacts in image and video coding

IEEE Transactions on Circuits and Systems for Video Technology
A DCT-based spatially adaptive post-processing technique to reduce the blocking artifacts in transform coded images

IEEE Transactions on Circuits and Systems for Video Technology
Efficient DCT-domain blind measurement and reduction of blocking artifacts

IEEE Transactions on Circuits and Systems for Video Technology
Overview of the H.264/AVC video coding standard

IEEE Transactions on Circuits and Systems for Video Technology
POCS-based blocking artifacts suppression using a smoothness constraint set with explicit region modeling

IEEE Transactions on Circuits and Systems for Video Technology

Quantified Score

Hi-index	0.00

Visualization

Abstract

A common method for selecting the best prediction mode based on block matching algorithm is to compare, for each source block, the associated distortions among the available prediction candidates. The human visual perception is sensitive to luminance contrast rather than absolute luminance values. In fact, the human eyes ability to detect the magnitude difference between an object and its background depends on the background luminance average value. The Perceptually Weighted Distortion (PWD) is a new distortion measure that can produce better image quality. In this paper, we propose to add a new feature to the PWD by introducing another diagonal component that yields to a significant quality improvement. The enhanced PWD metric actually outperforms the original PWD and the SAD metric, according to the experimental results, especially in the aspect of reducing block artifacts. An increase in terms of implementation complexity will be noticed as a result of this contribution. Therefore, optimized implementation of the Enhanced PWD exploiting the C64 DSP-Core assets will be presented. In fact, Standard Assembly (SA) is used to implement the different Enhanced PWD functions in order to exploit efficiently the C64 internal architecture and resources. Experimental results show more than 85% improvement in terms of cycle cost compared to C code.