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公开(公告)号：US20120189053A1
公开(公告)日：2012-07-26
申请号：US13274196
申请日：2011-10-14
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）。
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公开(公告)号：US20120170649A1
公开(公告)日：2012-07-05
申请号：US13336682
申请日：2011-12-23
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。
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公开(公告)号：US20120008682A1
公开(公告)日：2012-01-12
申请号：US13178427
申请日：2011-07-07
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。
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公开(公告)号：US09706227B2
公开(公告)日：2017-07-11
申请号：US13415453
申请日：2012-03-08
申请人： Ying Chen , Muhammed Zeyd Coban , Peisong Chen , Marta Karczewicz
发明人： Ying Chen , Muhammed Zeyd Coban , Peisong Chen , Marta Karczewicz
IPC分类号： H04N7/12 , H04N19/70 , H04N19/503 , G06T9/00 , H04N19/61
CPC分类号： H04N19/70 , G06T9/004 , H04N19/503 , H04N19/61
摘要： In general, this disclosure describes techniques for coding video data for random access. In particular, this disclosure proposes to code a syntax element that indicates if a dependent picture may be successfully decoded in the event of a random access request to a clean decoding refresh (CDR) picture and may be required for decoding the pictures following the clean decoding refresh (CDR) picture in display order.
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公开(公告)号：US09319716B2
公开(公告)日：2016-04-19
申请号：US13351980
申请日：2012-01-17
IPC分类号： H04N7/12 , H04N11/02 , H04N11/04 , H04N19/895 , H04N19/52 , H04N19/70 , H04N19/46 , H04N19/51 , H04N19/61
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。
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公开(公告)号：US20130010865A1
公开(公告)日：2013-01-10
申请号：US13536484
申请日：2012-06-28
IPC分类号： H04N7/32
CPC分类号： H04N19/59 , H04N19/117 , H04N19/156 , H04N19/184 , H04N19/43
摘要： An offset can be applied to intermediate values obtained while performing an interpolation filtering operation such that applying the offset reduces the bitdepth of the intermediate value. The intermediate value can be stored with the reduced bitdepth, and when retrieved, the offset can be added back such that future calculation can be performed using the intermediate value with the original bitdepth.
摘要翻译： 可以对执行内插滤波操作时获得的中间值应用偏移，使得应用偏移减少中间值的位差。 中间值可以用减少的位差存储，并且当检索时，可以将偏移量加回，以便可以使用具有原始bitdepth的中间值来执行将来的计算。
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公开(公告)号：US20120195368A1
公开(公告)日：2012-08-02
申请号：US13351980
申请日：2012-01-17
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。
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公开(公告)号：US20120008683A1
公开(公告)日：2012-01-12
申请号：US13178434
申请日：2011-07-07
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 select an intra-prediction mode to use to encode a block of video data, 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, when the block includes the sub-block of the 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, transform the sub-block using the selected one of the multiple possible transforms, and provide an indication of the selected one of the multiple possible transforms for the size 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，被配置为选择帧内预测模式以用于对视频数据块进行编码，确定该块是否包括可能进行多次转换的大小的子块 基于子块的大小和所选择的帧内预测模式，当该块包括基于子块的大小和所选择的帧内预测模式的可能的多个变换的大小的子块时 ，选择多个可能的变换之一，使用所选择的多个可能的变换中的一个来对子块进行变换，并且为块的大小提供所选择的多个可能变换中的一个的指示。
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公开(公告)号：US10992958B2
公开(公告)日：2021-04-27
申请号：US13336682
申请日：2011-12-23
IPC分类号： H04N19/60 , H04N19/46 , H04N19/129 , H04N19/176 , H04N19/159 , H04N19/147 , H04N19/122
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.
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公开(公告)号：US09661338B2
公开(公告)日：2017-05-23
申请号：US13178438
申请日：2011-07-07
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.
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