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    • 1. 发明申请
    • BINARIZING METHOD AND DEVICE THEREOF
    • 二进制方法及其装置
    • US20080231483A1
    • 2008-09-25
    • 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。
    • 2. 发明申请
    • METHOD AND DEVICE FOR MULTI-VIEW ENCODING/DECODING USING DISPARITY VECTOR
    • 使用差分矢量进行多视图编码/解码的方法和装置
    • US20090022222A1
    • 2009-01-22
    • US12239226
    • 2008-09-26
    • Yun HEXiaozhong XUGang ZHUPing YANGJianhua ZHENGShujuan SHIXiaozhen ZHENGXinjian MENG
    • Yun HEXiaozhong XUGang ZHUPing YANGJianhua ZHENGShujuan SHIXiaozhen ZHENGXinjian MENG
    • H04N7/12
    • H04N19/597
    • A method of obtaining a disparity vector and its encoding/decoding in the multi-view coding process is disclosed. The present invention includes essentially: determining a disparity vector between two views during the multi-view image coding, and computing a disparity vector between the other two views according to the disparity vector between the two views and the known relative location information between each of the views. Thereafter, the disparity vector is used for multi-view encoding/decoding. The present invention further makes use of the correlation between the disparity vector and depth information of the spatial vector on one hand, and on the other hand makes use of the direct relationship between the disparity vector and the location of each of the cameras. It is experimentally proved that the disparity vector between several views can be accurately computed during the multi-view coding, thereby improving the performance of multi-view coding.
    • 公开了一种在多视图编码处理中获得视差矢量及其编码/解码的方法。 本发明基本上包括:在多视图图像编码期间确定两个视图之间的视差向量,以及根据两个视图之间的视差矢量和每个视图之间的已知相对位置信息来计算其他两个视图之间的视差矢量 意见 此后,视差矢量用于多视图编码/解码。 本发明进一步利用视差矢量与空间矢量的深度信息之间的相关性,另一方面利用视差矢量与每个摄像机的位置之间的直接关系。 实验证明,可以在多视图编码期间精确地计算出几个视图之间的视差矢量,从而提高了多视图编码的性能。
    • 3. 发明申请
    • METHOD AND APPARATUS FOR REALIZING ARITHMETIC CODING/DECODING
    • 用于实现算术编码/解码的方法和装置
    • US20080240597A1
    • 2008-10-02
    • US12133222
    • 2008-06-04
    • Yun HEWei YUPing YANGXinjian MENG
    • Yun HEWei YUPing YANGXinjian MENG
    • G06K9/36
    • H03M7/4006H04N19/91
    • A method and apparatus for performing arithmetic encoding/decoding in an arithmetic encoder is disclosed. It comprises: firstly, when performing binary arithmetic encoding/decoding in the arithmetic encoder, an interval update process for arithmetic encoding/decoding to be performed in the original domain is mapped to the logarithm domain, and the interval update computation is implemented with direct add/subtract operations; during arithmetic encoding/decoding in the logarithm domain, data conversions between the original domain and the logarithm domain are performed by approximations; and after encoding/decoding a symbol, its probability is updated when necessary, the update being performed with add/subtract operations in the logarithm domain. It can be seen that with the arithmetic encoding/decoding solutions of the disclosure, the arithmetic encoding/decoding process and the probability estimation involved therein are mapped to the logarithm domain. Data conversions between the original domain and the logarithm domain are performed by means of approximation equations. Accordingly, complicated computations and table looking-up are avoided effectively. Therefore, the disclosure provides a simple, efficient and suitable solution for performing arithmetic encoding/decoding.
    • 公开了一种用于在算术编码器中执行算术编码/解码的方法和装置。 它包括:首先,当在算术编码器中进行二进制算术编码/解码时,将在原始域中执行的算术编码/解码的间隔更新处理被映射到对数域,并且间隔更新计算用直接加法 /减操作; 在对数域中的算术编码/解码期间,通过近似来执行原始域和对数域之间的数据转换; 并且在对符号进行编码/解码之后,必要时更新其概率,通过对数域中的加/减操作执行更新。 可以看出,利用本公开的算术编码/解码解决方案,算术编码/解码处理及其中涉及的概率估计被映射到对数域。 原始域和对数域之间的数据转换通过近似方程来执行。 因此,有效地避免了复杂的计算和表查找。 因此,本公开提供了一种用于执行算术编码/解码的简单,有效和合适的解决方案。