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International Conference on Signals and Electronic Systems (ICSES 2008)

作者： Ulacha, Grzegorz Stasinski, Ryszard Tech Univ Szczecin Dept Comp Sci PL-71210 Szczecin Poland

ISBN: (纸本)9788388309472

In the paper a lossless image coding method intended for real-time hardware intra-frame video coding system is described. Data modeling stage of the method is based on predictor blending idea, the following entropy coding stage is realized as an advanced adaptive context arithmetic coder. The stages can be separated by a quantizer, in which case the coder is becoming a near-lossless one. Experiments show that indeed, the new algorithm is not only time efficient, but has also excellent data compression performance.

关键词： lossless/near-lossless image coding predictor blending prediction error bias correction adaptive context arithmetic coder

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Method of lossless and near-lossless Color image Compression

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JOURNAL OF INFORMATION SCIENCE AND ENGINEERING 2011年第2期27卷 621-642页

作者： Ulacha, Grzegorz W Pomeranian Univ Technol Dept Comp Sci PL-71210 Szczecin Poland

In this paper, it is presented a detailed description of a proposal of an effective image encoder suitable for hardware realizations. A modelling block based on the blending prediction method and an encoding block performing a contextual, adaptive arithmetic encoding are proposed. The encoding operation in both lossless and near-lossless modes are described. It is analyzed how to lossless transform colours to obtain the best solution. An effectiveness analysis is also done by comparison of the compression rate of the proposed method with another hardware realization and a number of software implementations known from literature. Some suggestions are made regarding the implementation of the algorithm as the video sequence encoding system working in the real-time utilizing an efficient Network on Chip architecture.

关键词： lossless/near-lossless image coding predictor blending prediction error bias correction adaptive context arithmetic coder color transformation

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