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1. 发明申请

US20120082231A1 ZERO-OUT OF HIGH FREQUENCY COEFFICIENTS AND ENTROPY CODING RETAINED COEFFICIENTS USING A JOINT CONTEXT MODEL 有权
标题翻译：使用联合语境模型对高频系数和熵编码保留系数进行归零
公开(公告)号：US20120082231A1
公开(公告)日：2012-04-05
申请号：US13249020
申请日：2011-09-29
申请人： Joel Sole Rojals , Rajan L. Joshi , Marta Karczewicz
发明人： Joel Sole Rojals , Rajan L. Joshi , Marta Karczewicz
IPC分类号： H04N7/30
CPC分类号： H04N19/13 , H04N19/132 , H04N19/14 , H04N19/146 , H04N19/149 , H04N19/176 , H04N19/18 , H04N19/60 , H04N19/625 , H04N19/64 , H04N19/91
摘要： This disclosure describes techniques for performing entropy encoding and decoding of video coefficients using a joint context model shared between transform units having different sizes. For example, the joint context model may be shared between transform units having a first size of 32×32 and transform units having a second size of 16×16. Performing entropy coding using a joint context model shared between transform units having different sizes may reduce an amount of memory necessary to store contexts and probabilities, and reduce computational costs of maintaining context models. In one example, the joint context model may be shared between transform units having the first size with coefficients zeroed out to generate a retained coefficient block having the second size and transform units having the second size. In another example, the joint context model may be shared between transform units having the first size and transform units having the second size.
摘要翻译：本公开描述了使用在具有不同大小的变换单元之间共享的联合上下文模型来执行视频系数的熵编码和解码的技术。例如，联合上下文模型可以在第一大小为32×32的变换单元和具有第二大小16×16的变换单元之间共享。使用具有不同大小的变换单元之间共享的联合上下文模型执行熵编码可以减少存储上下文和概率所需的存储量，并且减少维护上下文模型的计算成本。在一个示例中，联合上下文模型可以在具有第一尺寸的系数被清零以产生具有第二尺寸的保留系数块和具有第二尺寸的变换单元之间的变换单元之间共享。在另一示例中，联合上下文模型可以在具有第一尺寸的变换单元和具有第二尺寸的变换单元之间共享。

2. 发明授权

US08913666B2 Entropy coding coefficients using a joint context model 有权
标题翻译：使用联合上下文模型的熵编码系数
公开(公告)号：US08913666B2
公开(公告)日：2014-12-16
申请号：US13249079
申请日：2011-09-29
申请人： Joel Sole Rojals , Rajan L. Joshi , Marta Karczewicz
发明人： Joel Sole Rojals , Rajan L. Joshi , Marta Karczewicz
IPC分类号： H04N11/04 , H04N19/13 , H04N19/176 , H04N19/14 , H04N19/146 , H04N19/91 , H04N19/132 , H04N19/18
CPC分类号： H04N19/13 , H04N19/132 , H04N19/14 , H04N19/146 , H04N19/149 , H04N19/176 , H04N19/18 , H04N19/60 , H04N19/625 , H04N19/64 , H04N19/91
摘要： This disclosure describes techniques for performing entropy encoding and decoding of video coefficients using a joint context model shared between transform units having different sizes. For example, the joint context model may be shared between transform units having a first size of 32×32 and transform units having a second size of 16×16. Performing entropy coding using a joint context model shared between transform units having different sizes may reduce an amount of memory necessary to store contexts and probabilities, and reduce computational costs of maintaining context models. In one example, the joint context model may be shared between transform units having the first size with coefficients zeroed out to generate a retained coefficient block having the second size and transform units having the second size. In another example, the joint context model may be shared between transform units having the first size and transform units having the second size.
摘要翻译：本公开描述了使用在具有不同大小的变换单元之间共享的联合上下文模型来执行视频系数的熵编码和解码的技术。例如，联合上下文模型可以在具有32×32的第一大小的变换单元和具有第二大小16×16的变换单元之间共享。使用具有不同大小的变换单元之间共享的联合上下文模型执行熵编码可以减少存储上下文和概率所需的存储量，并且减少维护上下文模型的计算成本。在一个示例中，联合上下文模型可以在具有第一尺寸的系数被清零以产生具有第二尺寸的保留系数块和具有第二尺寸的变换单元之间的变换单元之间共享。在另一示例中，联合上下文模型可以在具有第一尺寸的变换单元和具有第二尺寸的变换单元之间共享。

3. 发明授权

US08902988B2 Zero-out of high frequency coefficients and entropy coding retained coefficients using a joint context model 有权
标题翻译：使用联合上下文模型对高频系数和熵编码保留系数进行归零
公开(公告)号：US08902988B2
公开(公告)日：2014-12-02
申请号：US13249020
申请日：2011-09-29
申请人： Joel Sole Rojals , Rajan L. Joshi , Marta Karczewicz
发明人： Joel Sole Rojals , Rajan L. Joshi , Marta Karczewicz
IPC分类号： H04N11/02 , H04N19/132 , H04N19/91 , H04N19/13 , H04N19/14 , H04N19/176 , H04N19/146 , H04N19/18
CPC分类号： H04N19/13 , H04N19/132 , H04N19/14 , H04N19/146 , H04N19/149 , H04N19/176 , H04N19/18 , H04N19/60 , H04N19/625 , H04N19/64 , H04N19/91
摘要： This disclosure describes techniques for performing entropy encoding and decoding of video coefficients using a joint context model shared between transform units having different sizes. For example, the joint context model may be shared between transform units having a first size of 32×32 and transform units having a second size of 16×16. Performing entropy coding using a joint context model shared between transform units having different sizes may reduce an amount of memory necessary to store contexts and probabilities, and reduce computational costs of maintaining context models. In one example, the joint context model may be shared between transform units having the first size with coefficients zeroed out to generate a retained coefficient block having the second size and transform units having the second size. In another example, the joint context model may be shared between transform units having the first size and transform units having the second size.
摘要翻译：本公开描述了使用在具有不同大小的变换单元之间共享的联合上下文模型来执行视频系数的熵编码和解码的技术。例如，联合上下文模型可以在第一大小为32×32的变换单元和具有第二大小16×16的变换单元之间共享。使用具有不同大小的变换单元之间共享的联合上下文模型执行熵编码可以减少存储上下文和概率所需的存储量，并且减少维护上下文模型的计算成本。在一个示例中，联合上下文模型可以在具有第一尺寸的系数被清零以产生具有第二尺寸的保留系数块和具有第二尺寸的变换单元之间的变换单元之间共享。在另一示例中，联合上下文模型可以在具有第一尺寸的变换单元和具有第二尺寸的变换单元之间共享。

4. 发明申请

US20120082232A1 ENTROPY CODING COEFFICIENTS USING A JOINT CONTEXT MODEL 有权
标题翻译：使用联合语境模型的熵编码系数
公开(公告)号：US20120082232A1
公开(公告)日：2012-04-05
申请号：US13249079
申请日：2011-09-29
申请人： Joel Sole Rojals , Rajan L. Joshi , Marta Karczewicz
发明人： Joel Sole Rojals , Rajan L. Joshi , Marta Karczewicz
IPC分类号： H04N7/12
CPC分类号： H04N19/13 , H04N19/132 , H04N19/14 , H04N19/146 , H04N19/149 , H04N19/176 , H04N19/18 , H04N19/60 , H04N19/625 , H04N19/64 , H04N19/91
摘要： This disclosure describes techniques for performing entropy encoding and decoding of video coefficients using a joint context model shared between transform units having different sizes. For example, the joint context model may be shared between transform units having a first size of 32×32 and transform units having a second size of 16×16. Performing entropy coding using a joint context model shared between transform units having different sizes may reduce an amount of memory necessary to store contexts and probabilities, and reduce computational costs of maintaining context models. In one example, the joint context model may be shared between transform units having the first size with coefficients zeroed out to generate a retained coefficient block having the second size and transform units having the second size. In another example, the joint context model may be shared between transform units having the first size and transform units having the second size.
摘要翻译：本公开描述了使用在具有不同大小的变换单元之间共享的联合上下文模型来执行视频系数的熵编码和解码的技术。例如，联合上下文模型可以在第一大小为32×32的变换单元和具有第二大小16×16的变换单元之间共享。使用具有不同大小的变换单元之间共享的联合上下文模型执行熵编码可以减少存储上下文和概率所需的存储量，并且减少维护上下文模型的计算成本。在一个示例中，联合上下文模型可以在具有第一尺寸的系数被清零以产生具有第二尺寸的保留系数块和具有第二尺寸的变换单元之间的变换单元之间共享。在另一示例中，联合上下文模型可以在具有第一尺寸的变换单元和具有第二尺寸的变换单元之间共享。

5. 发明申请

US20110249737A1 MIXED TAP FILTERS 有权
标题翻译：混合TAP过滤器
公开(公告)号：US20110249737A1
公开(公告)日：2011-10-13
申请号：US13012583
申请日：2011-01-24
申请人： Rajan L. Joshi , Marta Karczewicz , Wei-Jung Chien
发明人： Rajan L. Joshi , Marta Karczewicz , Wei-Jung Chien
IPC分类号： H04N7/32
CPC分类号： H04N19/523 , H04N19/117 , H04N19/70 , H04N19/82
摘要： During the prediction stage of a video encoding and/or decoding process, a video coder can use relatively longer filters for certain motion vectors pointing to certain sub-pixel positions and relatively shorter filters for motion vectors pointing to other sub-pixel positions, where a longer filter generally refers to an interpolation filter with a greater number of filter coefficients, also called taps, while a shorter filter generally refers to an interpolation filter with fewer taps.
摘要翻译：在视频编码和/或解码处理的预测阶段期间，视频编码器可以针对指向某些子像素位置的特定运动矢量使用相对较长的滤波器，并且对于指向其它子像素位置的运动矢量可以使用相对较短的滤波器，其中更长的滤波器通常是指具有更多数量的滤波器系数的插值滤波器，也称为抽头，而较短的滤波器通常是指具有较少抽头的插值滤波器。

6. 发明授权

US09081733B2 16-point transform for media data coding 有权
标题翻译：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。

7. 发明授权

US08665964B2 Video coding based on first order prediction and pre-defined second order prediction mode 有权
标题翻译：基于一阶预测和预定义二阶预测模式的视频编码
公开(公告)号：US08665964B2
公开(公告)日：2014-03-04
申请号：US12495613
申请日：2009-06-30
申请人： Rajan L. Joshi , Peisong Chen , Marta Karczewicz
发明人： Rajan L. Joshi , Peisong Chen , Marta Karczewicz
IPC分类号： H04N7/18
CPC分类号： H04N19/567 , H04N19/102 , H04N19/105 , H04N19/109 , H04N19/11 , H04N19/147 , H04N19/176 , H04N19/61
摘要： This disclosure describes video encoding and decoding techniques in which a first order prediction process and a second order prediction process are used in combination to generate predictive video blocks for video coding. First order prediction may be similar to conventional motion estimation and motion compensation that generates residual video blocks. The second order prediction may involve a process similar to conventional intra-prediction, but is performed on the residual video blocks. The techniques of this disclosure may pre-define the second order prediction to a specific mode, such as a mode similar to the intra-DC mode used in intra coding. In addition, the techniques of this disclosure may combine aspects of the first order and second order prediction into a single process so that the effects of second order prediction on the residuals are taken into account during the first order prediction process, which may improve compression.
摘要翻译：本公开描述了视频编码和解码技术，其中组合使用一阶预测处理和二阶预测处理以产生用于视频编码的预测视频块。第一阶预测可以类似于产生残余视频块的常规运动估计和运动补偿。二阶预测可以涉及与常规帧内预测类似的处理，但是对剩余视频块执行。本公开的技术可以预定义到特定模式的二阶预测，例如类似于帧内编码中使用的DC内模式的模式。此外，本公开的技术可以将一阶和二阶预测的方面组合成单个过程，使得在第一阶预测过程期间考虑二阶预测对残差的影响，这可以改善压缩。

8. 发明申请

US20100329329A1 8-POINT TRANSFORM FOR MEDIA DATA CODING 有权
标题翻译：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。

9. 发明授权

US09661338B2 Coding syntax elements for adaptive scans of transform coefficients for video coding 有权
公开(公告)号：US09661338B2
公开(公告)日：2017-05-23
申请号：US13178438
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： H04N19/194 , H04N19/159 , H04N19/176 , H04N19/46 , H04N19/196 , H04N19/13 , H04N19/122 , H04N19/129 , H04N19/61 , H04N19/96 , H04N19/593 , H04N19/11 , H04N19/132 , H04N19/14 , H04N19/157 , H04N19/60 , H04N19/85
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 scan a two-dimensional block of transform coefficients to produce a one-dimensional vector of the transform coefficients, determine values indicative of whether the transform coefficients in the one-dimensional vector are significant; and entropy encode at least one of the values using a context model selected based on at least a percentage of significant coefficients in a predetermined number of the values encoded before the at least one of the values.

10. 发明授权

US09185422B2 Variable localized bit-depth increase for fixed-point transforms in video coding 有权
标题翻译：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。

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