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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

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。

6. 发明申请

WO2013006483A1 VIDEO CODING USING ADAPTIVE MOTION VECTOR RESOLUTION 审中-公开
标题翻译：使用自适应运动矢量分辨率进行视频编码
公开(公告)号：WO2013006483A1
公开(公告)日：2013-01-10
申请号：PCT/US2012/045078
申请日：2012-06-29
申请人： QUALCOMM INCORPORATED , CHIEN, Wei-Jung , CHEN, Peisong , KARCZEWICZ, Marta
发明人： CHIEN, Wei-Jung , CHEN, Peisong , KARCZEWICZ, Marta
IPC分类号： H04N7/26 , H04N7/50 , H04N19/00
CPC分类号： H04N19/13 , H04N19/513 , H04N19/517 , H04N19/52 , H04N19/523 , H04N19/61 , H04N19/70 , H04N19/91
摘要： In one example, a video coding device includes a video coder configured to code information representative of whether an absolute value of an x-component of a motion vector difference value for a current block of video data is greater than zero, code information representative of whether an absolute value of a y-component of the motion vector difference value is greater than zero, when the absolute value of the x-component is greater than zero, code information representative of the absolute value of the x-component, when the absolute value of the y-component is greater than zero, code information representative of the absolute value of the y-component, when the absolute value of the x-component is greater than zero, code a sign of the x-component, and when the absolute value of the y-component is greater than zero, code a sign of the y-component.
摘要翻译：在一个示例中，视频编码装置包括视频编码器，被配置为对表示当前视频数据块的运动矢量差值的x分量的绝对值是否大于零的代码信息进行编码，代表信息是否表示当x分量的绝对值大于零时，运动矢量差值的y分量的绝对值大于零，表示x分量的绝对值的代码信息，当绝对值的y分量大于零，代表y分量的绝对值的代码信息，当x分量的绝对值大于零时，编码x分量的符号，当绝对值 y分量的值大于零，编码y分量的符号。

7. 发明申请

WO2012173991A1 BORDER PIXEL PADDING FOR INTRA PREDICTION IN VIDEO CODING 审中-公开
标题翻译：用于视频编码的内部预测的边界像素包装
公开(公告)号：WO2012173991A1
公开(公告)日：2012-12-20
申请号：PCT/US2012/042052
申请日：2012-06-12
申请人： QUALCOMM INCORPORATED , WANG, Xianglin , CHIEN, Wei-Jung , KARCZEWICZ, Marta , CHEN, Peisong , CHEN, Ying
发明人： WANG, Xianglin , CHIEN, Wei-Jung , KARCZEWICZ, Marta , CHEN, Peisong , CHEN, Ying
IPC分类号： H04N7/26 , H04N7/34 , H04N7/50
CPC分类号： H04N19/182 , H04N19/105 , H04N19/593 , H04N19/61
摘要： A video coder performs a padding operation that processes a set of border pixels according to an order. The order starts at a bottom-left border pixel and proceeds through the border pixels sequentially to a top-right border pixel. When the padding operation processes an unavailable border pixel, the padding operation predicts a value of the unavailable border pixel based on a value of a border pixel previously processed by the padding operation. The video coder may generate an intra-predicted video block based on the border pixels.
摘要翻译：视频编码器根据顺序执行处理一组边框像素的填充操作。该顺序从左下角的边框像素开始，并且顺序通过边框像素顺序到右上边框像素。当填补操作处理不可用边界像素时，填充操作基于先前由填充操作处理的边界像素的值来预测不可用边框像素的值。视频编码器可以基于边界像素生成帧内预测视频块。

8. 发明申请

WO2012102927A1 PERFORMING MOTION VECTOR PREDICTION FOR VIDEO CODING 审中-公开
标题翻译：执行视频编码运动矢量预测
公开(公告)号：WO2012102927A1
公开(公告)日：2012-08-02
申请号：PCT/US2012/021742
申请日：2012-01-18
申请人： QUALCOMM INCORPORATED , CHIEN, Wei-Jung , CHEN, Peisong , COBAN, Muhammed Zeyd , KARCZEWICZ, Marta
发明人： CHIEN, Wei-Jung , CHEN, Peisong , COBAN, Muhammed Zeyd , KARCZEWICZ, Marta
IPC分类号： H04N7/26 , H04N7/68
CPC分类号： H04N19/61 , H04N19/46 , H04N19/51 , H04N19/52 , H04N19/70 , H04N19/895
摘要： In general, techniques are described for performing motion vector prediction for video coding. An apparatus comprising a motion compensation unit may implement the techniques. The motion compensation unit determines spatial candidate motion vectors (MVPs) associated with a current portion of a video frame and prunes the spatial candidate motion vectors to remove duplicates without removing a temporal candidate motion vector. The motion compensation unit selects one of the temporal candidate motion vector or one of the spatial candidate motion vectors remaining after pruning as a selected candidate motion vector based on a motion vector predictor (MVP) index signaled in a bitstream and performs motion compensation based on the selected candidate motion vector.
摘要翻译：通常，描述了用于执行视频编码的运动矢量预测的技术。包括运动补偿单元的装置可以实现这些技术。运动补偿单元确定与视频帧的当前部分相关联的空间候选运动矢量（MVP），并修剪空间候选运动矢量以去除重复，而不去除时间候选运动矢量。运动补偿单元基于在比特流中发信号的运动矢量预测器（MVP）索引，选择剪枝之后剩余的时间候选运动矢量或空间候选运动矢量中的一个作为选择的候选运动矢量，并基于选择的候选运动矢量。

9. 发明申请

WO2012102973A1 SINGLE REFERENCE PICTURE LIST CONSTRUCTION FOR VIDEO CODING 审中-公开
标题翻译：用于视频编码的单一参考图片列表结构
公开(公告)号：WO2012102973A1
公开(公告)日：2012-08-02
申请号：PCT/US2012/022102
申请日：2012-01-20
申请人： QUALCOMM INCORPORATED , CHEN, Peisong , CHIEN, Wei-Jung , KARCZEWICZ, Marta , CHEN, Ying
发明人： CHEN, Peisong , CHIEN, Wei-Jung , KARCZEWICZ, Marta , CHEN, Ying
IPC分类号： H04N7/26 , H04N7/46 , H04N7/50
CPC分类号： H04N19/577 , H04N19/109 , H04N19/159 , H04N19/17 , H04N19/174 , H04N19/176 , H04N19/46 , H04N19/61
摘要： The example techniques described in this disclosure provide for an efficient manner to encode or decode a video block of a picture using a single reference picture list. The single reference picture list may include identifiers for reference picture or pictures used to encode or decode the video block. In some examples, a video encoder or decoder may encode or decode a video block that is predicted from two reference pictures using the single reference picture list, and encode or decode a video block that is predicted from one reference picture using the same, single reference picture list.
摘要翻译：本公开中描述的示例技术提供了使用单个参考图片列表对图像的视频块进行编码或解码的有效方式。单个参考图片列表可以包括用于编码或解码视频块的参考图片或图片的标识符。在一些示例中，视频编码器或解码器可以使用单个参考图片列表从两个参考图片预测的视频块编码或解码，并且使用相同的单个参考来对从一个参考图片预测的视频块进行编码或解码图片列表。

10. 发明申请

WO2012051000A1 ADAPTIVE MOTION VECTOR RESOLUTION SIGNALING FOR VIDEO CODING 审中-公开
标题翻译：自适应运动矢量分解信号用于视频编码
公开(公告)号：WO2012051000A1
公开(公告)日：2012-04-19
申请号：PCT/US2011/054629
申请日：2011-10-03
申请人： QUALCOMM INCORPORATED , CHIEN, Wei-Jung , CHEN, Peisong , KARCZEWICZ, Marta
发明人： CHIEN, Wei-Jung , CHEN, Peisong , KARCZEWICZ, Marta
IPC分类号： H04N7/26 , H04N7/36 , H04N7/46 , H04N7/50
CPC分类号： H04N19/523 , H04N19/13 , H04N19/139 , H04N19/176 , H04N19/463 , H04N19/91
摘要： A video encoder may be configured to adaptively select a sub-pixel precision for motion vectors used to encode video data. The video encoder may further entropy encode an indication of the sub-pixel precision using context adaptive binary arithmetic coding, where the context may correspond to the size of a block of video data for the motion vector. For example, the size may correspond to the depth of a coding unit, the size of a prediction unit of the coding unit, and/or a type for the prediction unit. The video encoder may also interpolate values for one-sixteenth pixel positions of chrominance data using bilinear interpolation. The video encoder may further encode a motion vector difference value for the motion vector using an encoding scheme corresponding to the sub-pixel precision of the motion vector. A video decoder may use similar, reciprocal techniques for decoding the video data.
摘要翻译：视频编码器可以被配置为自适应地选择用于对视频数据进行编码的运动矢量的子像素精度。视频编码器可以使用上下文自适应二进制算术编码进一步对子像素精度的指示进行熵编码，其中上下文可以对应于用于运动矢量的视频数据块的大小。例如，大小可以对应于编码单元的深度，编码单元的预测单元的大小和/或预测单元的类型。视频编码器也可以使用双线性插值内插色度数据的第十六象素位置的值。视频编码器可以使用与运动矢量的子像素精度相对应的编码方案来进一步编码运动矢量的运动矢量差值。视频解码器可以使用类似的互逆技术来解码视频数据。

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