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1. 发明申请

WO2012009237A1 VARIABLE LOCALIZED BIT DEPTH INCREASE FOR FIXED-POINT TRANSFORMS IN VIDEO CODING 审中-公开
标题翻译：视频编码中固定点变换的可变本地化位深度增加
公开(公告)号：WO2012009237A1
公开(公告)日：2012-01-19
申请号：PCT/US2011/043462
申请日：2011-07-08
申请人： QUALCOMM INCORPORATED , JOSHI, Rajan, L. , CHIEN, Wei-Jung , KARCZEWICZ, Marta , REZNIK, Yuriy , CHEN, Peisong , CHUANG, Hsiao-Chiang
发明人： JOSHI, Rajan, L. , CHIEN, Wei-Jung , KARCZEWICZ, Marta , REZNIK, Yuriy , CHEN, Peisong , CHUANG, Hsiao-Chiang
IPC分类号： H04N7/26 , H04N7/30 , H04N7/50
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。

2. 发明申请

WO2012006568A1 VIDEO CODING USING A SUBSET OF INTRA PREDICTION MODES AND CORRESPONDING DIRECTIONAL TRANSFORMS 审中-公开
标题翻译：使用内部预测模式和对应方向转换的视频编码
公开(公告)号：WO2012006568A1
公开(公告)日：2012-01-12
申请号：PCT/US2011/043422
申请日：2011-07-08
申请人： QUALCOMM INCORPORATED , KARCZEWICZ, Marta , COBAN, Muhammed, Z. , CHEN, Peisong , CHUANG, Hsiao-Chiang , JOSHI, Rajan, L.
发明人： KARCZEWICZ, Marta , COBAN, Muhammed, Z. , CHEN, Peisong , CHUANG, Hsiao-Chiang , JOSHI, Rajan, L.
IPC分类号： H04N7/26 , H04N7/34 , H04N7/50 , H04N7/30
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，用于编码视频数据的装置包括：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。

3. 发明申请

WO2012006574A3 ADAPTING FREQUENCY TRANSFORMS FOR INTRA BLOCKS CODING BASED ON SIZE AND INTRA MODE OR BASED ON EDGE DETECTION 审中-公开
公开(公告)号：WO2012006574A3
公开(公告)日：2012-01-12
申请号：PCT/US2011/043434
申请日：2011-07-08
申请人： QUALCOMM INCORPORATED , KARCZEWICZ, Marta , COBAN, Muhammed, Z. , CHEN, Peisong , CHUANG, Hsiao-Chiang , JOSHI, Rajan, L.
发明人： KARCZEWICZ, Marta , COBAN, Muhammed, Z. , CHEN, Peisong , CHUANG, Hsiao-Chiang , JOSHI, Rajan, L.
IPC分类号： H04N7/26 , H04N7/34 , H04N7/50 , H04N7/30
摘要： In a first example, the apparatus is configured to select an intra-prediction mode, determine whether the block includes a sub-block of a size for which multiple transforms are possible based on the size of the sub-block and the selected intra-prediction mode, select one of the multiple possible transforms to transform the sub-block, and provide an indication of the selected transform. In a second example, the apparatus is configured to determine that a block to be intra-prediction encoded contains an edge within the block, select an edge-based intra-prediction mode, transform the residual block using a directional transform mapped from a directional intra-prediction mode having an angle that approximates an angle of the edge, and output information indicating that the block was predicted using a DC intra-prediction mode.

4. 发明申请

WO2012006576A2 CODING SYNTAX ELEMENTS FOR ADAPTIVE SCANS OF TRANSFORM COEFFICIENTS FOR VIDEO CODING 审中-公开
标题翻译：用于视频编码的变换系数自适应扫描的语法元素编码
公开(公告)号：WO2012006576A2
公开(公告)日：2012-01-12
申请号：PCT/US2011/043437
申请日：2011-07-08
申请人： QUALCOMM INCORPORATED , KARCZEWICZ, Marta , COBAN, Muhammed, Z. , CHEN, Peisong , CHUANG, Hsiao-Chiang , JOSHI, Rajan, L.
发明人： KARCZEWICZ, Marta , COBAN, Muhammed, Z. , CHEN, Peisong , CHUANG, Hsiao-Chiang , JOSHI, Rajan, L.
IPC分类号： H04N7/26
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.
摘要翻译：在一个示例中，一种用于对视频数据进行编码的设备包括：视频编码器，其被配置为扫描变换系数的二维块以产生变换系数的一维矢量;确定指示是否一维矢量中的变换系数是显着的; 并且使用基于在所述至少一个值之前编码的预定数量的值中的有效系数的至少一个百分比选择的上下文模型来对所述值中的至少一个进行熵编码。

5. 发明申请

WO2011130187A1 MIXED TAP FILTERS 审中-公开
标题翻译：混合TAP过滤器
公开(公告)号：WO2011130187A1
公开(公告)日：2011-10-20
申请号：PCT/US2011/031998
申请日：2011-04-11
申请人： QUALCOMM INCORPORATED , JOSHI, Rajan L. , KARCZEWICZ, Marta , CHIEN, Wei-Jung
发明人： JOSHI, Rajan L. , KARCZEWICZ, Marta , CHIEN, Wei-Jung
IPC分类号： H04N7/26 , H04N7/36
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. 发明申请

WO2011005573A2 8-POINT TRANSFORM FOR MEDIA DATA CODING 审中-公开
标题翻译：用于媒体数据编码的8点变换
公开(公告)号：WO2011005573A2
公开(公告)日：2011-01-13
申请号：PCT/US2010/039660
申请日：2010-06-23
申请人： QUALCOMM Incorporated , REZNIK, Yuriy , JOSHI, Rajan, L. , KARCZEWICZ, Marta
发明人： REZNIK, Yuriy , JOSHI, Rajan, L. , KARCZEWICZ, Marta
IPC分类号： G06F17/14
CPC分类号： H04N19/00812 , G06F17/147 , H04N19/42 , H04N19/45 , H04N19/61 , H04N19/625
摘要： In general, techniques are described for implementing an 8-point discrete cosine transform (DCT). An apparatus comprising an 8-point discrete cosine transform (DCT) hardware unit may implement these techniques to transform media data from a spatial domain to a frequency domain. The 8-point DCT 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 DCT 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 internal factor and a fourth internal factor, as well as, the fifth internal factor and a sixth internal factor.
摘要翻译：通常，描述了用于实现8点离散余弦变换（DCT）的技术。包括8点离散余弦变换（DCT）硬件单元的装置可以实施这些技术以将媒体数据从空间域转换到频域。 8点DCT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DCT硬件单元还包括与根据第二关系的第二比例因子（α）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缩放因子与第三个内在因素和第四个内在因素以及第五个内在因素和第六个内在因素联系起来。

7. 发明申请

WO2011005572A2 8-POINT TRANSFORM FOR MEDIA DATA CODING 审中-公开
标题翻译：用于媒体数据编码的8点变换
公开(公告)号：WO2011005572A2
公开(公告)日：2011-01-13
申请号：PCT/US2010/039657
申请日：2010-06-23
申请人： QUALCOMM Incorporated , REZNIK, Yuriy , JOSHI, Rajan L. , KARCZEWICZ, Marta
发明人： REZNIK, Yuriy , JOSHI, Rajan L. , KARCZEWICZ, Marta
IPC分类号： G06F17/14
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）硬件单元的装置可以实现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缩放因子（α）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相关联。

8. 发明申请

WO2011005583A2 16-POINT TRANSFORM FOR MEDIA DATA CODING 审中-公开
标题翻译：用于媒体数据编码的16点变换
公开(公告)号：WO2011005583A2
公开(公告)日：2011-01-13
申请号：PCT/US2010/039692
申请日：2010-06-23
申请人： QUALCOMM INCORPORATED , REZNIK, Yuriy , JOSHI, Rajan, L. , KARCZEWICZ, Marta
发明人： REZNIK, Yuriy , JOSHI, Rajan, L. , KARCZEWICZ, Marta
IPC分类号： G06F17/14
CPC分类号： G06F17/147 , H04N19/122 , H04N19/176 , H04N19/42 , H04N19/61 , H04N19/625
摘要： In general, techniques are described for implementing a 16-point discrete cosine transform (DCT) that is capable of applying multiple IDCT of different sizes. For example, an apparatus comprising a 16-point discrete cosine transform of type II (DCT-II) unit may implement the techniques of this disclosure. The 16-point DCT-II unit performs these DCTs-II of different sizes to transform data from a spatial to a frequency domain. The 16-point DCT-II unit includes an 8-point DCT-II unit that performs one of the DCTs-II of size 8 and a first 4-point DCT-II unit that performs one of the DCTs-II of size 4. The 8-point DCT-II unit includes the first 4-point DCT-II unit. The 16-point DCT-II unit also comprises an 8-point DCT-IV unit that includes a second 4-point DCT-II unit and a third 4-point DCT-II unit. Each of the second and third 4-point DCT-II units performs one of the DCTs-II of size 4.
摘要翻译：通常，描述了用于实现能够应用不同大小的多个IDCT的16点离散余弦变换（DCT）的技术。例如，包括II型（DCT-II）单元的16点离散余弦变换的装置可以实现本公开的技术。 16点DCT-II单元执行不同尺寸的DCT-II以将数据从空间变换到频域。 16点DCT-II单元包括执行尺寸为8的DCT-II之一的8点DCT-II单元和执行尺寸为4的DCT-II之一的第一个4点DCT-II单元。 8点DCT-II单元包括第一个4点DCT-II单元。 16点DCT-II单元还包括8点DCT-IV单元，其包括第二个4点DCT-II单元和第三个4点DCT-II单元。第二和第三4点DCT-II单元中的每一个执行大小为4的DCT-II之一。

9. 发明申请

WO2011005578A3 16-POINT TRANSFORM FOR MEDIA DATA CODING 审中-公开
公开(公告)号：WO2011005578A3
公开(公告)日：2011-01-13
申请号：PCT/US2010/039676
申请日：2010-06-23
申请人： QUALCOMM Incorporated , REZNIK, Yuriy , JOSHI, Rajan L. , KARCZEWICZ, Marta
发明人： REZNIK, Yuriy , JOSHI, Rajan L. , KARCZEWICZ, Marta
IPC分类号： G06F17/14 , H04N7/26
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 these techniques. 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.

10. 发明申请

WO2011103206A1 ADAPTIVE MOTION RESOLUTION FOR VIDEO CODING 审中-公开
标题翻译：用于视频编码的自适应运动分辨率
公开(公告)号：WO2011103206A1
公开(公告)日：2011-08-25
申请号：PCT/US2011/025113
申请日：2011-02-16
申请人： QUALCOMM INCORPORATED , CHIEN, Wei-Jung , KARCZEWICZ, Marta , CHEN, Peisong
发明人： CHIEN, Wei-Jung , KARCZEWICZ, Marta , CHEN, Peisong
IPC分类号： H04N7/26 , H04N7/36 , H04N7/50
CPC分类号： H04N19/58 , H04N19/102 , H04N19/147 , H04N19/172 , H04N19/176 , H04N19/46 , H04N19/52 , H04N19/523 , H04N19/61
摘要： A video encoder may encode video data by adaptively selecting between one-eighth-pixel and one-quarter-pixel precision motion vectors, and signal the selected precision. In one example, an apparatus includes a video encoder to encode a block of video data using a one-eighth-pixel precision motion vector when use of the one-eighth-pixel precision motion vector is determined to be preferable for the block over a one-quarter-pixel precision motion vector, and to generate a signal value indicative of the use of the one-eighth-pixel precision motion vector for the block, and an output interface to output the encoded block and the signal value. A video decoder may be configured to receive the signal value and the encoded block, analyze the signal value to determine whether the block was encoded using one-eighth-pixel precision or one-quarter-pixel precision, and decode the block based on the determination.
摘要翻译：视频编码器可以通过在八分之一像素和四分之一像素精度的运动矢量之间进行自适应选择来对视频数据进行编码，并且将所选精度发信号。在一个示例中，一种装置包括：视频编码器，当使用八分之一像素的精确运动矢量被确定为优于一块时，使用八分之一像素的精确运动矢量对视频数据块进行编码并且生成指示使用该块的八分之一像素精度运动矢量的信号值，以及输出接口以输出编码块和信号值。视频解码器可以被配置为接收信号值和编码块，分析信号值以确定块是使用八分之一像素精度还是四分之一像素精度进行编码，并且基于该确定对块进行解码。

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