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    • 19. 发明授权
    • Binarizing method and device thereof
    • 二价法及其装置
    • US07564384B2
    • 2009-07-21
    • US12132959
    • 2008-06-04
    • Yun HePing YangWei YuXinjian MengJianhua Zheng
    • Yun HePing YangWei YuXinjian MengJianhua Zheng
    • H03M7/00
    • H04N19/517H04N19/139H04N19/50H04N19/91
    • A binary coding and decoding method and apparatus for MVD (Motion Vector Difference) absolute values, includes: dividing symbols for MVD absolute values to be coded into a plurality of subsets according to probability distribution properties; assigning a binary codeword for each subset; assigning a binary codeword for each symbol in each subset; concatenating and outputting the binary codeword for each subset and the binary codeword for each symbol in the subset, as the binary coding result. At the decoding side, decoding operations are performed by using a principle corresponding to that at the coding side. In this manner, the invention makes full use of the source properties on one hand, and effectively prevents the codeword length from being too long on the other hand. It has been experimentally testified that a better compression effect may be achieved during arithmetic coding process and thus the image coding performance may be improved effectively.
    • 用于MVD(运动矢量差)绝对值的二进制编码和解码方法和装置包括:根据概率分布特性将要编码的MVD绝对值的符号划分成多个子集; 为每个子集分配二进制码字; 为每个子集中的每个符号分配二进制码字; 作为二进制编码结果,连接并输出每个子集的二进制码字和子集中每个符号的二进制码字。 在解码侧,通过使用与编码侧对应的原理进行解码操作。 以这种方式,本发明一方面充分利用了源特性,另一方面有效地防止了码字长度过长。 已经通过实验证明,在算术编码过程中可以获得更好的压缩效果,因此可以有效地提高图像编码性能。