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    VIDEO CODING USING DIRECTIONAL TRANSFORMS
    1.
    发明申请
    VIDEO CODING USING DIRECTIONAL TRANSFORMS 有权
    使用方向变换的视频编码

    公开(公告)号：US20120008682A1

    公开(公告)日：2012-01-12

    申请号：US13178427

    申请日：2011-07-07

    申请人： Marta Karczewicz ,  Muhammed Zeyd Coban ,  Peisong Chen ,  Hsiao-Chiang Chuang ,  Rajan L. Joshi

    发明人： Marta Karczewicz ,  Muhammed Zeyd Coban ,  Peisong Chen ,  Hsiao-Chiang Chuang ,  Rajan L. Joshi

    IPC分类号： H04N7/32

    CPC分类号： H04N19/61 ,  H04N19/11 ,  H04N19/122 ,  H04N19/129 ,  H04N19/13 ,  H04N19/132 ,  H04N19/14 ,  H04N19/157 ,  H04N19/159 ,  H04N19/176 ,  H04N19/194 ,  H04N19/196 ,  H04N19/46 ,  H04N19/593 ,  H04N19/60 ,  H04N19/85 ,  H04N19/96

    摘要： In one example, an apparatus for encoding video data includes a video encoder configured to calculate a residual block for a block of video data based on a predicted block formed using an intra-prediction mode, and transform the residual block using a transform mapped from the intra-prediction mode. In another example, an apparatus includes video encoder configured to receive an indication of a first intra-prediction mode in a first set of intra-prediction modes for a block of video data, determine a second intra-prediction mode from a second set of intra-prediction modes, smaller than the first set of intra-prediction modes, to which the first intra-prediction mode is mapped, determine a directional transform to which the second intra-prediction mode is mapped, and apply the directional transform to residual data of the block.

    摘要翻译： 在一个示例中，用于对视频数据进行编码的装置包括视频编码器，被配置为基于使用帧内预测模式形成的预测块来计算视频数据块的残差块，并且使用从 帧内预测模式。 在另一示例中，一种装置包括视频编码器，其被配置为在视频数据块的第一组帧内预测模式中接收第一帧内预测模式的指示，从第二组帧内预测模式中确定第二帧内预测模式 小于第一帧内预测模式映射的第一组帧内预测模式的预测模式确定映射了第二帧内预测模式的方向变换，并将定向变换应用于 块。

    Variable Localized Bit-Depth Increase for Fixed-Point Transforms in Video Coding
    6.
    发明申请
    Variable Localized Bit-Depth Increase for Fixed-Point Transforms in Video Coding 有权
    视频编码中定点变换的可变局部位深增加

    公开(公告)号：US20120014455A1

    公开(公告)日：2012-01-19

    申请号：US13159063

    申请日：2011-06-13

    申请人： Rajan L. Joshi ,  Wei-Jung Chien ,  Marta Karczewicz ,  Yuriy Reznik ,  Peisong Chen ,  Hsiao-Chiang Chuang

    发明人： Rajan L. Joshi ,  Wei-Jung Chien ,  Marta Karczewicz ,  Yuriy Reznik ,  Peisong Chen ,  Hsiao-Chiang Chuang

    IPC分类号： H04N7/30

    CPC分类号： H04N19/42 ,  H04N19/122 ,  H04N19/157 ,  H04N19/176 ,  H04N19/184 ,  H04N19/196 ,  H04N19/46 ,  H04N19/60 ,  H04N19/61

    摘要： This disclosure describes techniques for mitigating rounding errors in a fixed-point transform associated with video coding by applying a variable localized bit-depth increase at the transform. More specifically, the techniques include selecting a constant value based on a size of a fixed-point transform in a video coding device and applying a variable localized bit-depth increase at the transform with a value equal to the constant value. Applying the variable localized bit-depth increase includes left-shifting a transform input signal by a number of bits equal to the constant value before the fixed-point transform, and right-shifting a transform output signal by a number of bits equal to the constant value after the fixed-point transform. The constant value is selected from a plurality of constant values stored on the video coding device. Each of the constant values is pre-calculated for one of a plurality of different transform sizes supported by the video coding.

    摘要翻译： 本公开描述了通过在变换处应用可变局部位深增加来减轻与视频编码相关联的定点变换中的舍入误差的技术。 更具体地，这些技术包括基于视频编码装置中的定点变换的大小来选择常数值，并且在变换时以等于常数值的值应用可变的局部位深增加。 应用可变局部位置深度增加包括将变换输入信号左移到等于定点变换之前的常数值的位数，并且将变换输出信号右移到等于常数的位数 定点变换后的值。 从存储在视频编码装置上的多个常数值中选择常数值。 对于由视频编码支持的多个不同的变换大小之一，预先计算每个常数值。

    Variable localized bit-depth increase for fixed-point transforms in video coding
    7.
    发明授权
    Variable localized bit-depth increase for fixed-point transforms in video coding 有权
    视频编码中定点变换的可变局部化位深增加

    公开(公告)号：US09185422B2

    公开(公告)日：2015-11-10

    申请号：US13159063

    申请日：2011-06-13

    申请人： Rajan L. Joshi ,  Wei-Jung Chien ,  Marta Karczewicz ,  Yuriy Reznik ,  Peisong Chen ,  Hsiao-Chiang Chuang

    发明人： Rajan L. Joshi ,  Wei-Jung Chien ,  Marta Karczewicz ,  Yuriy Reznik ,  Peisong Chen ,  Hsiao-Chiang Chuang

    IPC分类号： H04N7/12 ,  H04N19/42 ,  H04N19/176 ,  H04N19/46 ,  H04N19/196 ,  H04N19/122 ,  H04N19/61 ,  H04N19/60 ,  H04N19/157 ,  H04N19/184

    CPC分类号： H04N19/42 ,  H04N19/122 ,  H04N19/157 ,  H04N19/176 ,  H04N19/184 ,  H04N19/196 ,  H04N19/46 ,  H04N19/60 ,  H04N19/61

    摘要： This disclosure describes techniques for mitigating rounding errors in a fixed-point transform associated with video coding by applying a variable localized bit-depth increase at the transform. More specifically, the techniques include selecting a constant value based on a size of a fixed-point transform in a video coding device and applying a variable localized bit-depth increase at the transform with a value equal to the constant value. Applying the variable localized bit-depth increase includes left-shifting a transform input signal by a number of bits equal to the constant value before the fixed-point transform, and right-shifting a transform output signal by a number of bits equal to the constant value after the fixed-point transform. The constant value is selected from a plurality of constant values stored on the video coding device. Each of the constant values is pre-calculated for one of a plurality of different transform sizes supported by the video coding.

    摘要翻译： 本公开描述了通过在变换处应用可变局部位深增加来减轻与视频编码相关联的定点变换中的舍入误差的技术。 更具体地，这些技术包括基于视频编码装置中的定点变换的大小来选择常数值，并且在变换时以等于常数值的值应用可变的局部位深增加。 应用可变局部位置深度增加包括将变换输入信号左移到等于定点变换之前的常数值的位数，并且将变换输出信号右移到等于常数的位数 定点变换后的值。 从存储在视频编码装置上的多个常数值中选择常数值。 对于由视频编码支持的多个不同的变换大小之一，预先计算每个常数值。

    COMBINED REFERENCE PICTURE LIST CONSTRUCTION FOR VIDEO CODING
    8.
    发明申请
    COMBINED REFERENCE PICTURE LIST CONSTRUCTION FOR VIDEO CODING 有权
    用于视频编码的组合参考图片列表构造

    公开(公告)号：US20120189053A1

    公开(公告)日：2012-07-26

    申请号：US13274196

    申请日：2011-10-14

    申请人： Ying Chen ,  Muhammed Zeyd Coban ,  Wei-Jung Chien ,  Marta Karczewicz ,  Peisong Chen

    发明人： Ying Chen ,  Muhammed Zeyd Coban ,  Wei-Jung Chien ,  Marta Karczewicz ,  Peisong Chen

    IPC分类号： H04N7/32

    CPC分类号： H04N19/577 ,  H04N19/105 ,  H04N19/147 ,  H04N19/176 ,  H04N19/46 ,  H04N19/56 ,  H04N19/573 ,  H04N19/70

    摘要： This disclosure relates to techniques for constructing a combined reference picture list, List C, based on List 0 and List 1, used for uni-directional prediction of video blocks in any direction. The techniques include coding one or more syntax elements defined to indicate construction information for List C, and performing reference picture list construction for List C from List 0 and List 1 based on the syntax elements. The one or more syntax elements may indicate that List C is used for uni-directional prediction, and may also indicate a number of reference pictures identified in List C and a reference index of a reference picture for each entry in List C. Each coded video block of a B slice may have an associated syntax element, i.e., inter_pred_idc, to indicate whether the video block is bi-predicted from List 0 and List 1 (Bi) or uni-directional predicted from List C (Pred_LC).

    摘要翻译： 本公开涉及用于构建基于列表0和列表1的组合参考图片列表C的技术，其用于在任何方向上对视频块进行单向预测。 这些技术包括编码一个或多个语法元素，其定义为指示列表C的构造信息，并且基于语法元素从列表0和列表1执行列表C的参考图像列表构造。 一个或多个语法元素可以指示列表C用于单向预测，并且还可以指示列表C中标识的参考图片的数量和列表C中的每个条目的参考图片的参考索引。每个编码视频 B片的块可以具有相关联的语法元素，即inter_pred_idc，以指示视频块是从列表0和列表1（Bi）是双向预测的还是从列表C预测的单向（Pred_LC）。

    VIDEO CODING USING MAPPED TRANSFORMS AND SCANNING MODES
    9.
    发明申请
    VIDEO CODING USING MAPPED TRANSFORMS AND SCANNING MODES 审中-公开
    使用映射变换和扫描模式进行视频编码

    公开(公告)号：US20120170649A1

    公开(公告)日：2012-07-05

    申请号：US13336682

    申请日：2011-12-23

    申请人： Peisong Chen ,  Yunfei Zheng ,  Rajan Laxman Joshi ,  Muhammed Zeyd Coban ,  Marta Karczewicz

    发明人： Peisong Chen ,  Yunfei Zheng ,  Rajan Laxman Joshi ,  Muhammed Zeyd Coban ,  Marta Karczewicz

    IPC分类号： H04N7/50 ,  H04N7/30

    CPC分类号： H04N19/60 ,  H04N19/122 ,  H04N19/129 ,  H04N19/147 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46

    摘要： A video encoder may transform residual data by using a transform selected from a group of transforms. The transform is applied to the residual data to create a two-dimensional array of transform coefficients. A scanning mode is selected to scan the transform coefficients in the two-dimensional array into a one-dimensional array of transform coefficients. The combination of transform and scanning mode may be selected from a subset of combinations that is based on an intra-prediction mode. The scanning mode may also be selected based on the transform used to create the two-dimensional array. The transforms and/or scanning modes used may be signaled to a video decoder.

    摘要翻译： 视频编码器可以通过使用从一组变换中选择的变换来变换残差数据。 将变换应用于残差数据以创建变换系数的二维阵列。 选择扫描模式以将二维阵列中的变换系数扫描成变换系数的一维阵列。 可以从基于帧内预测模式的组合的子集中选择变换和扫描模式的组合。 也可以基于用于创建二维阵列的变换来选择扫描模式。 所使用的变换和/或扫描模式可以被通知给视频解码器。