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An Adaptive multialphabet arithmetic coding Based on Generalized Virtual Sliding Window

IEEE SIGNAL PROCESSING LETTERS 2017年第7期24卷 1034-1038页

作者： Belyaev, Evgeny Forchhammer, Soren Liu, Kai Tech Univ Denmark Dept Photon Engn DK-2800 Lyngby Denmark Xidian Univ Sch Comp Sci & Technol Xian 710126 Peoples R China

We propose a novel efficient multialphabet multiplication-free adaptive arithmetic coder. First, we generalize probability estimation via virtual sliding window for the multialphabet case and show that it does not require multiplications and provides a tradeoff between the probability adaptation speed and the precision of the probability estimation. Second, we show how the generalized virtual sliding window can be used to eliminate multiplications and divisions. Finally, we demonstrate that the proposed arithmetic coder provides better compression performance than existing implementations based on state-of-the-art multiplication-free binary arithmetic coders.

关键词： multialphabet arithmetic coding probability estimation

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A parallel scheme for implementing multialphabet arithmetic coding in high-speed programmable hardware

A parallel scheme for implementing multialphabet arithmetic ...

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International Conference on Information Technology - coding and Computing

作者： Mahapatra, S Singh, K Indian Inst Technol Dept Elect & Elect Commun Engn Kharagpur 721302 W Bengal India

ISBN: (纸本)0769523153

In this paper, a scheme is proposed for parallel-pipelined implementation of the multialphabet arithmetic-coding algorithm used in lossless data compression. Using this scheme, it is possible to parallelize both the encoding and decoding operations used respectively in data compression and decompression. The compression performance of the proposed implementation for both order 0 and order 1 models have been evaluated and compared with existing sequential implementations in terms of compression ratios as well as the execution time using the Canterbury Corpus benchmark set of files. The proposed scheme also facilitates hardware realisation of the respective modules and hence is suitable for integration into embedded microprocessor systems, an important area where lossless data compression is applied.

关键词： lossless data compression multialphabet arithmetic coding modelling code interval pipelined implementation compression efficiency

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An adaptive multialphabet arithmetic coding for video compression

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IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS FOR VIDEO TECHNOLOGY 1998年第2期8卷 130-137页

作者： Hsieh, MH Wei, CH Natl Chiao Tung Univ Dept Elect Engn Hsinchu 30010 Taiwan

In this paper, the hardware implementation issues far an adaptive multialphabet arithmetic coder are discussed. A simple weighted history model is proposed to encode the video dare, This model uses a weighted finite buffer to model the cumulative density function of the arithmetic coder. The performance of the weighted history model is evaluated together with several other well-known models. To access, search, and update the cumulative frequencies corresponding to model symbols in real rime, we present a low complexity multibase cumulative occurrence array structure that can offer the probability information Tor high-speed encoding and decoding, for the application in video compression, the multialphabet arithmetic coding with weighted history model can be a good choice as the variable length coding of the video symbols.

关键词： data compression multialphabet arithmetic coding symbol probability models

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