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    • 5. 发明授权
    • Variable length coding of video block coefficients
    • 视频块系数的可变长度编码
    • US09490839B2
    • 2016-11-08
    • US13338891
    • 2011-12-28
    • Marta KarczewiczXianglin WangWei-Jung ChienLiwei Guo
    • Marta KarczewiczXianglin WangWei-Jung ChienLiwei Guo
    • H04N11/04H03M7/42H04N19/13H04N19/60H04N19/93
    • H03M7/42H04N19/13H04N19/60H04N19/93
    • This disclosure describes techniques for coding transform coefficients for a block of video data. According to some aspects of this disclosure, a coder (e.g., an encoder or decoder) may map between a code number cn and level_ID and run values associated with a first transform coefficient of the block of video data according to a first technique (e.g., a structured mapping), and map between a code number cn and level_ID and run values associated with a second coefficient of the block using a second technique. According to other aspects of this disclosure, the coder may map between a code number cn and level_ID and run syntax elements using different mathematical relationships, depending on a determined value of the code number cn or the level_ID syntax element. For example, the coder may access a mapping table of a plurality of mapping tables differently, dependent on the determined value.
    • 本公开描述了用于编码视频数据块的变换系数的技术。 根据本公开的一些方面,编码器(例如,编码器或解码器)可以根据第一技术(例如,编码器或解码器)在视频数据块的第一变换系数与代码号cn和level_ID之间映射和运行值, 结构化映射),并且使用第二技术在代码号cn和level_ID之间映射和与块的第二系数相关联的运行值。 根据本公开的其他方面,编码器可以根据代码号cn或level_ID语法元素的确定值,在代码号cn和level_ID之间映射并使用不同的数学关系运行语法元素。 例如,编码器可以根据确定的值不同地访问多个映射表的映射表。
    • 7. 发明申请
    • TRANSITION BETWEEN RUN AND LEVEL CODING MODES
    • 运行和电平编码模式之间的过渡
    • US20130003859A1
    • 2013-01-03
    • US13467756
    • 2012-05-09
    • Marta KarczewiczLiwei GuoXianglin Wang
    • Marta KarczewiczLiwei GuoXianglin Wang
    • H04N7/26
    • H04N19/18H04N19/103H04N19/13H04N19/14H04N19/46H04N19/61H04N19/70
    • This disclosure describes techniques for coding transform coefficients for a block of video data. According to some aspects of this disclosure, a video coder (e.g., encoder, decoder) may code a first coefficient of a leaf-level unit of video data using a run encoding mode. The coder may code a second coefficient of the leaf-level unit of video data using a level encoding mode. After coding at least one coefficient using the level coding mode, the coder may use the run coding mode to code a third other coefficient of the leaf-level unit of video data. According to other aspects, an encoder may signal, to a decoder, at least one indication of a transition between level and run coding modes. According to still other aspects, a coder may automatically determine when to transition between the level and run coding modes.
    • 本公开描述了用于编码视频数据块的变换系数的技术。 根据本公开的一些方面,视频编码器(例如,编码器,解码器)可以使用运行编码模式来编码视频数据的叶级单元的第一系数。 编码器可以使用电平编码模式来编码视频数据的叶级单元的第二系数。 在使用电平编码模式编码至少一个系数之后,编码器可以使用运行编码模式来编码视频数据的叶级单元的第三其他系数。 根据其它方面,编码器可以向解码器发送电平和运行编码模式之间的转换的至少一个指示。 根据其他方面,编码器可以自动确定何时在电平和运行编码模式之间转换。