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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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22.发明申请公开(公告)号：US20120140822A1
公开(公告)日：2012-06-07
申请号：US13237412
申请日：2011-09-20
CPC分类号： H04N19/14 , H04N19/129 , H04N19/176 , H04N19/196 , H04N19/197
摘要： Video coding devices and methods use a function-based definition of scan order to scan transform coefficients associated with a block of residual video data. A video coder may define a scan order for coefficients based on a predefined function and one or more parameter values. A video encoder may use a function-based scan order to scan a two-dimensional array of coefficients to produce a one-dimensional array of coefficients for use in producing encoded video data. The video encoder may signal the parameters to a video decoder, or the video decoder may infer one or more of the parameters. The video decoder may use the function-based scan order to scan a one-dimensional array of coefficients to reproduce the two-dimensional array of coefficients for use in producing decoded video data. In each case, the scan order may vary according to the parameter values, which may include block size, orientation, and/or orientation strength.
摘要翻译： 视频编码设备和方法使用扫描顺序的基于功能的定义来扫描与一组残留视频数据相关联的变换系数。 视频编码器可以基于预定义的功能和一个或多个参数值来定义系数的扫描顺序。 视频编码器可以使用基于功能的扫描顺序来扫描系数的二维阵列以产生用于产生编码视频数据的一维系数阵列。 视频编码器可以将参数发送给视频解码器，或者视频解码器可以推断一个或多个参数。 视频解码器可以使用基于功能的扫描顺序来扫描系数的一维阵列，以再现用于产生解码视频数据的二维系数阵列。 在每种情况下，扫描顺序可以根据可能包括块大小，取向和/或取向强度的参数值而变化。
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公开(公告)号：US20120099646A1
公开(公告)日：2012-04-26
申请号：US13275128
申请日：2011-10-17
CPC分类号： H04N19/14 , H04N19/129 , H04N19/176 , H04N19/46 , H04N19/70
摘要： In an example, an apparatus for decoding video data includes a video decoder that is configured to determine a number of transform coefficients associated with a block of video data, and to determine whether the number of transform coefficients exceeds a predetermined threshold. The video decoder is also configured to identify a scan order when the number of transform coefficients exceeds the predetermined threshold, wherein the scan order indicates an order in which the transform coefficients have been serialized from a two-dimensional array to a one-dimensional array, and to apply the scan order to inverse scan the number of transform coefficients associated with a block of video data.
摘要翻译： 在一个示例中，用于解码视频数据的装置包括视频解码器，其被配置为确定与视频数据块相关联的变换系数的数量，并且确定变换系数的数量是否超过预定阈值。 视频解码器还被配置为当变换系数的数量超过预定阈值时识别扫描顺序，其中扫描顺序指示变换系数已经从二维阵列串行化为一维阵列的顺序， 并且应用扫描顺序对与视频数据块相关联的变换系数的数量进行逆扫描。
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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：US09215473B2
公开(公告)日：2015-12-15
申请号：US13357386
申请日：2012-01-24
IPC分类号： H04N19/436 , H04N19/196 , H04N19/70 , H04N19/13 , H04N19/96 , H04N19/174
CPC分类号： H04N19/436 , H04N19/13 , H04N19/174 , H04N19/197 , H04N19/70 , H04N19/96
摘要： A video encoder partitions a slice of a picture into a plurality of sub-slices. When the video encoder encodes the slice, the video encoder generates a coded slice that includes coded sub-slices that correspond to the sub-slices. Each of the sub-slices can be parsed independently of each other one of the sub-slices and can be reconstructed independently of each other one of the sub-slices. Accordingly, a video decoder may parse two or more of the sub-slices in parallel and decode two or more of the sub-slices in parallel.
摘要翻译： 视频编码器将图片的片分割成多个子片。 当视频编码器对切片进行编码时，视频编码器生成包括对应于子切片的编码子切片的编码切片。 每个子片段可以彼此独立地解析子片之一，并且可以彼此独立地重建子片之一。 因此，视频解码器可以并行地解析两个或更多个子片段，并且并行地解码两个或更多个子片段。
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公开(公告)号：US09083983B2
公开(公告)日：2015-07-14
申请号：US13532392
申请日：2012-06-25
IPC分类号： H04N7/26 , H04N19/55 , H04N19/563 , H04N19/52 , H04N19/51
CPC分类号： H04N19/55 , H04N19/51 , H04N19/52 , H04N19/563
摘要： This disclosure describes techniques for coding a video block based on an unclipped version of a motion vector predictor candidate. The techniques include determining a motion vector predictor candidate list including motion vector predictor candidates from neighboring video blocks without clipping the motion vector predictor candidates. More specifically, if one of the motion vector predictor candidates points to a prediction block located outside of a reference picture boundary relative to the current video block, the techniques allow an unclipped version of the motion vector predictor candidate to be included in the candidate list. The current video block is then coded based on a determined unclipped motion vector predictor candidate of the candidate list. Elimination of the motion vector predictor candidate clipping process reduces complexity at both the video encoder and the video decoder.
摘要翻译： 本公开描述了基于运动矢量预测器候选的未剪切版本对视频块进行编码的技术。 这些技术包括：确定包括来自相邻视频块的运动矢量预测器候选的运动矢量预测器候选列表，而不限制运动矢量预测器候选。 更具体地，如果运动矢量预测器候选中的一个指向相对于当前视频块的参考图像边界外部的预测块，则该技术允许运动矢量预测器候选的未剪切版本被包括在候选列表中。 然后基于候选列表的确定的未剪切的运动矢量预测器候选来对当前视频块进行编码。 消除运动矢量预测器候选削波处理降低了视频编码器和视频解码器的复杂度。
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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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