Mode Dependent Coefficients Scanning with Multi-Mode Analysis

Abstract:

In block transform based coding, coefficients scanning plays an important role in improving compression performance. A good scanning method has great potential to remove statistical redundancy, as it can apply an energy compaction coefficients vector. In this paper, a mode-dependent (MD) coefficients scanning method is introduced, with the idea of reducing the overall bit rate by adopting side information to coding mode indexes. In the experiment, we design 128 MD scanning tables according to the DCT coefficients energy distribution, and explore the relationship between the number of scanning table used and the bit saving in image coding. The results provide reference to choose scanning modes by considering the trade-off of the increasing of side information and the decrease of data redundancy.

• Periodical: Applied Mechanics and Materials (Volumes 719-720)
• Pages: 1056-1062
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.719-720.1056
• Online since: January 2015
• Authors: Dang Jing Liu*, Long Ye, Jing Ling Wang, Qin Zhang
• Keywords: Adaptive Scanning, Image Coding, Mode-Dependent Templates

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