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    • 10. 发明申请
    • METHOD FOR ADAPTIVE ENTROPY CODING OF TREE STRUCTURES
    • 树结构的自适应熵编码方法
    • US20140185668A1
    • 2014-07-03
    • US14233519
    • 2011-07-18
    • Wenfei JiangKangying CaiZhibo Chen
    • Wenfei JiangKangying CaiZhibo Chen
    • H04N19/96H04N19/44
    • H04N19/96G06T9/00G06T9/001G06T9/005G06T9/40H03M7/40H03M7/4056H03M7/6088H03M7/6094H04N19/44
    • In 3D mesh coding, the geometry data is compressed by spatial tree based approaches. Bitstreams that result from the traversal of a tree structure of spatial tree based approaches for encoding 3D mesh models have systematically special redundancies, which is exploited for further improving the mesh model compression. A method for encoding a bitstream comprises steps of defining at least a first and a second symbol group of binary symbols, with S1 being a subset of S2, determining within the bitstream first portions, second portions and third portions, wherein first portions have Th1 or more consecutive S1 symbols and second portions have Th2 or more consecutive S2 symbols, encoding the bitstream, wherein first portions, second portions and third portions are encoded using different codes, and encoding values indicating the boundary positions between the first, second and third portions in the bitstream.
    • 在3D网格编码中,几何数据通过基于空间树的方法进行压缩。 通过遍历基于空间树的基于空间树的编码3D网格模型的方法产生的位流具有系统的特殊冗余,被用于进一步改进网格模型压缩。 一种用于编码比特流的方法包括以下步骤:定义二进制符号的至少第一和第二符号组,其中S1是S2的子集,在比特流第一部分,第二部分和第三部分内确定其中第一部分具有Th1或 更连续的S1符号和第二部分具有Th2或更多个连续的S2符号,对比特流进行编码,其中使用不同的代码对第一部分,第二部分和第三部分进行编码,并且编码指示第一,第二和第三部分之间的边界位置的值 比特流。