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    Variable Localized Bit-Depth Increase for Fixed-Point Transforms in Video Coding
    1.
    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
    2.
    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。

    VIDEO CODING USING DIRECTIONAL TRANSFORMS
    4.
    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。

    16-point transform for media data coding
    8.
    发明授权
    16-point transform for media data coding 有权
    用于媒体数据编码的16点变换

    公开(公告)号：US09081733B2

    公开(公告)日：2015-07-14

    申请号：US12820346

    申请日：2010-06-22

    申请人： Yuriy Reznik ,  Rajan L. Joshi ,  Marta Karczewicz

    发明人： Yuriy Reznik ,  Rajan L. Joshi ,  Marta Karczewicz

    IPC分类号： H04N7/12 ,  H04N11/02 ,  G06F17/14

    CPC分类号： G06F17/147 ,  H04N19/42 ,  H04N19/61 ,  H04N19/625

    摘要： In general, techniques are described for implementing a 16-point inverse discrete cosine transform (IDCT) that is capable of applying multiple IDCTs of different sizes. For example, an apparatus comprising a 16-point inverse discrete cosine transform of type II (IDCT-II) unit may implement the techniques of this disclosure. The 16-point IDCT-II unit performs these IDCTs-II of different sizes to transform data from a spatial to a frequency domain. The 16-point IDCT-II unit includes an 8-point IDCT-II unit that performs one of the IDCTs-II of size 8 and a first 4-point IDCT-II unit that performs one of the IDCTs-II of size 4. The 8-point IDCT-II unit includes the first 4-point DCT-II unit. The 16-point IDCT-II unit also comprises an inverse 8-point DCT-IV unit that includes a second 4-point IDCT-II unit and a third 4-point IDCT-II unit. Each of the second and third 4-point IDCT-II units performs one of the IDCTs-II of size 4.

    摘要翻译： 一般来说，描述了实现能够应用不同大小的多个IDCT的16点离散余弦变换（IDCT）的技术。 例如，包括II型（IDCT-II）单元的16点逆离散余弦变换的装置可以实现本公开的技术。 16点IDCT-II单元执行不同尺寸的这些IDCT-II以将数据从空间变换到频域。 16点IDCT-II单元包括执行尺寸为8的IDCT-II之一的8点IDCT-II单元和执行大小为4的IDCT-II之一的第一个4点IDCT-II单元。 8点IDCT-II单元包括第一个4点DCT-II单元。 16点IDCT-II单元还包括具有第二4点IDCT-II单元和第三个4点IDCT-II单元的逆8点DCT-IV单元。 第二和第三4点IDCT-II单元中的每一个执行大小为4的IDCT-II之一。

    8-POINT TRANSFORM FOR MEDIA DATA CODING
    9.
    发明申请
    8-POINT TRANSFORM FOR MEDIA DATA CODING 有权
    用于媒体数据编码的8点变换

    公开(公告)号：US20100329329A1

    公开(公告)日：2010-12-30

    申请号：US12820312

    申请日：2010-06-22

    申请人： Yuriy Reznik ,  Rajan L. Joshi ,  Marta Karczewicz

    发明人： Yuriy Reznik ,  Rajan L. Joshi ,  Marta Karczewicz

    IPC分类号： H04N7/12

    CPC分类号： H04N19/625 ,  G06F17/147 ,  H04N19/60

    摘要： In general, techniques are described for implementing an 8-point inverse discrete cosine transform (IDCT). An apparatus comprising an 8-point inverse discrete cosine transform (IDCT) hardware unit may implement these techniques to transform media data from a frequency domain to a spatial domain. The 8-point IDCT hardware unit includes an even portion comprising factors A, B that are related to a first scaled factor (μ) in accordance with a first relationship. The 8-point IDCT hardware unit also includes an odd portion comprising third, fourth, fifth and sixth internal factors (G, D, E, Z) that are related to a second scaled factor (η) in accordance with a second relationship. The first relationship relates the first scaled factor to the first and second internal factors. The second relationship relates the second scaled factor to the third, fourth, fifth and sixth internal factors.

    摘要翻译： 通常，描述了用于实现8点逆离散余弦变换（IDCT）的技术。 包括8点逆离散余弦变换（IDCT）硬件单元的装置可实施这些技术以将媒体数据从频域转换为空间域。 8点IDCT硬件单元包括与根据第一关系的第一缩放因子（μ）相关的因子A，B的偶数部分。 8点IDCT硬件单元还包括与根据第二关系的第二比例因子（＆eegr）相关的第三，第四，第五和第六内部因素（G，D，E，Z）的奇数部分。 第一个关系将第一个缩放因子与第一个和第二个内部因素相关联。 第二个关系将第二个比例因素与第三个，第四个，第五个和第六个内部因素联系起来。

    8-point transform for media data coding
    10.
    发明授权
    8-point transform for media data coding 有权
    用于媒体数据编码的8点变换

    公开(公告)号：US09118898B2

    公开(公告)日：2015-08-25

    申请号：US12820312

    申请日：2010-06-22

    申请人： Yuriy Reznik ,  Rajan L. Joshi ,  Marta Karczewicz

    发明人： Yuriy Reznik ,  Rajan L. Joshi ,  Marta Karczewicz

    IPC分类号： H04N7/12 ,  H04N19/625 ,  G06F17/14 ,  H04N19/60

    CPC分类号： H04N19/625 ,  G06F17/147 ,  H04N19/60

    摘要： In general, techniques are described for implementing an 8-point inverse discrete cosine transform (IDCT). An apparatus comprising an 8-point inverse discrete cosine transform (IDCT) hardware unit may implement these techniques to transform media data from a frequency domain to a spatial domain. The 8-point IDCT hardware unit includes an even portion comprising factors A, B that are related to a first scaled factor (μ) in accordance with a first relationship. The 8-point IDCT hardware unit also includes an odd portion comprising third, fourth, fifth and sixth internal factors (G, D, E, Z) that are related to a second scaled factor (η) in accordance with a second relationship. The first relationship relates the first scaled factor to the first and second internal factors. The second relationship relates the second scaled factor to the third, fourth, fifth and sixth internal factors.

    摘要翻译： 通常，描述了用于实现8点逆离散余弦变换（IDCT）的技术。 包括8点逆离散余弦变换（IDCT）硬件单元的装置可实施这些技术以将媒体数据从频域转换为空间域。 8点IDCT硬件单元包括与根据第一关系的第一缩放因子（μ）相关的因子A，B的偶数部分。 8点IDCT硬件单元还包括与根据第二关系的第二比例因子（＆eegr）相关的第三，第四，第五和第六内部因素（G，D，E，Z）的奇数部分。 第一个关系将第一个缩放因子与第一个和第二个内部因素相关联。 第二个关系将第二个比例因素与第三个，第四个，第五个和第六个内部因素联系起来。