JPEG2000上下文形成算法的研究与实现  

Research and implementation of algorithms of context formation of JPEG2000

作　　者：高勇[1] 尹琦[1] 李存华[1] 

机构地区：[1]淮海工学院计算机科学系,江苏连云港222005

出　　处：《计算机工程与设计》2008年第18期4773-4776,共4页Computer Engineering and Design

摘　　要：在JPEG2000的EBCOT编码中,算术编码器需要使用上下文信息来编码相应的记号,上下文形成器是其重要基础。通过对位平面中的样本的条带扫描方式和记号的环境特征的详细分析,把记号和记号的上下文进行了合理的分类,这就为上下文形成算法的设计提供了理论根据。关于清理通道中的RLC上下文标志的形成,因为有关文献的论述并不清楚,所以有必要做出明确的解释,并给出了一个有效的算法。整个算法用Delphi实现,实验结果证明了其正确性。In the EBCOT of JPEG 2000, the arithmetic encoder uses the context information to encode the corresponding symbol, the context formation engine is the important foundation in the coding of JPEG2000. The stripe scan mode for the samples and the environment character of the symbols in Bit-plane are analyzed in detail, the classification is carried out to these symbols and their contexts, a basis of the design of the algorithms of context is provided. About the RLC algorithm of context formation in the clean pass, the describe of the references is not clear, thus, a clear explain is given, and the algorithm is designed in effect. The context formation engine is implemented based on Delphi, the results of the experiment support the research.

关 键 词：JPEG2000 EBCOT 编码 上下文 算法 

分 类 号：TN919[电子电信—通信与信息系统]