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    Adaptive bypass mode for coding absolute values of transform coefficients
    1.
    发明公开
    Adaptive bypass mode for coding absolute values of transform coefficients 有权
    Adaptiver Bypass-Modefürdie Kodierung absoluter Werte von Transformationskoeffizienten

    公开(公告)号：EP2637405A1

    公开(公告)日：2013-09-11

    申请号：EP12164309.2

    申请日：2012-04-16

    申请人： BlackBerry Limited ,  Nguyen, Nguyen ,  Ji, Tianying ,  He, Dake

    发明人： Nguyen, Nguyen ,  Ji, Tianying ,  He, Dake

    IPC分类号： H04N7/26 ,  H04N7/30 ,  H04N7/50 ,  H03M7/40

    CPC分类号： H03M7/4006 ,  H03M7/4018 ,  H03M7/6011 ,  H03M7/6017 ,  H04N19/13 ,  H04N19/14 ,  H04N19/176 ,  H04N19/18 ,  H04N19/182 ,  H04N19/61

    摘要： Methods and devices for reconstructing coefficient levels from a bitstream of encoded video data for a coefficient group in a transform unit, using adaptive-threshold-based level coding. Threshold is set based upon level information from one or more previously-reconstructed coefficient groups in the transform unit. Threshold may be maximum number of level flags to decode for the coefficient group. Level information may include number of level flags decoded in previous coefficient groups. Previously-reconstructed coefficient groups may include coefficient group to the right and below the current coefficient group.

    摘要翻译： 用于使用基于自适应阈值的电平编码来从变换单元中的系数组的编码视频数据的比特流重建系数级的方法和装置。 基于来自变换单元中的一个或多个先前重构的系数组的级别信息设置阈值。 阈值可以是用于系数组解码的最大级别标志数。 电平信息可以包括在先前系数组中解码的电平标志的数量。 先前重建的系数组可以包括当前系数组右侧和下面的系数组。

    ROLLING INTRA PREDICTION FOR IMAGE AND VIDEO CODING
    3.
    发明公开
    ROLLING INTRA PREDICTION FOR IMAGE AND VIDEO CODING 审中-公开
    滚动帧内图像和视频编码预测

    公开(公告)号：EP3209019A1

    公开(公告)日：2017-08-23

    申请号：EP17154343.2

    申请日：2017-02-02

    申请人： BlackBerry Limited

    发明人： He, Dake

    IPC分类号： H04N19/11 ,  H04N19/105 ,  H04N19/147 ,  H04N19/176 ,  H04N19/61

    CPC分类号： H04N19/11 ,  H04N19/105 ,  H04N19/147 ,  H04N19/176 ,  H04N19/61

    摘要： Methods and devices for image and video coding using rolling intra prediction. The encoder selects a mode for a current block, the current block having a plurality of neighboring reference samples from an adjacent block, wherein the mode is associated with a prediction function. A predicted block of predicted pixels is constructed by initially determining at least some of the predicted pixels based on the prediction function with one or more of the neighboring reference samples as inputs to the prediction function, and by determining at least some other of the predicted pixels based on the prediction function with the at least some of the predicted pixels as inputs. The process proceeds to build the predicted block in a traversing order using predicted pixels of the same predicted block as inputs to the prediction function for determining other predicted pixels of the predicted block. The decoder performs the same prediction process.

    摘要翻译： 使用滚动帧内预测的图像和视频编码的方法和设备。 编码器为当前块选择模式，当前块具有来自相邻块的多个相邻参考样本，其中该模式与预测函数相关联。 预测像素的预测块通过以下方式构建：首先基于具有一个或多个相邻参考采样的预测函数来确定预测像素中的至少一些作为预测函数的输入，并且通过确定至少一些其他预测像素 基于至少一些预测像素的预测函数作为输入。 该过程继续以使用相同预测块的预测像素作为对预测函数的输入的遍历顺序构建预测块，以确定预测块的其他预测像素。 解码器执行相同的预测过程。

    Coding position data for the last non-zero transform coefficient in a coefficient group
    5.
    发明公开
    Coding position data for the last non-zero transform coefficient in a coefficient group 有权
    在einer Koeffizientengruppe的Codierung von Positionsdatenfürden letzten Nicht-Null-Umwandlungskoeffizienten

    公开(公告)号：EP2852166A1

    公开(公告)日：2015-03-25

    申请号：EP14185652.6

    申请日：2014-09-19

    申请人： BlackBerry Limited

    发明人： Wang, Xiaofeng ,  Wang, Jing ,  He, Dake ,  Ji, Tianying

    IPC分类号： H04N19/13 ,  H04N19/91 ,  H04N19/157

    CPC分类号： H04N19/593 ,  H04N19/103 ,  H04N19/122 ,  H04N19/129 ,  H04N19/13 ,  H04N19/157 ,  H04N19/159 ,  H04N19/176 ,  H04N19/18 ,  H04N19/423 ,  H04N19/44 ,  H04N19/513 ,  H04N19/91

    摘要： Methods and devices for video coding are described. When encoding a non-zero coefficient group (CG) prior to the last such group in a group scan ordering within a transform block, data representative of the true (x,y)-position of the last non-zero transform coefficient in a scan ordering within that CG is modified, to improve coding efficiency, based upon at least one of (a) an intra-prediction mode used to encode the block and (b) at least one coefficient group neighbouring that CG. Upon decoding a CG thus encoded, the modification is un-done to retrieve the true (x,y)-position.

    摘要翻译： 描述用于视频编码的方法和装置。 当在变换块内的组扫描排序中对最后一个这样的组之前的非零系数组（CG）进行编码时，表示扫描中最后非零变换系数的真（x，y）位的数据 基于（a）用于编码块的帧内预测模式和（b）与该CG相邻的至少一个系数组中的至少一个，修改该CG内的排序以提高编码效率。 在对由此编码的CG进行解码时，修改未被完成以检索真（x，y）位。

    Methods and devices for inter-layer prediction in scalable video compression
    8.
    发明公开
    Methods and devices for inter-layer prediction in scalable video compression 审中-公开
    Verfahren und Vorrichtungen zur Zwischenschichtvorhersage在skalierbarer Videokomprimierung

    公开(公告)号：EP2704440A2

    公开(公告)日：2014-03-05

    申请号：EP13157130.9

    申请日：2013-02-28

    申请人： BlackBerry Limited

    发明人： Wang, Jing ,  He, Dake ,  Yu, Xiang ,  Ji, Tianying

    IPC分类号： H04N19/33 ,  H04N19/187 ,  H04N19/59 ,  H04N19/61

    CPC分类号： H04N19/00533 ,  H04N19/187 ,  H04N19/33 ,  H04N19/503 ,  H04N19/59 ,  H04N19/61 ,  H04N19/80

    摘要： Methods and devices for encoding and decoding scalable video are described. In one aspect, a method of reconstructing, in a video decoder, an enhancement-layer image based upon a reconstructed reference-layer image using inter-layer prediction is described. The method includes reconstructing a reference-layer residual and a reference-layer prediction, wherein the reference-layer residual and the reference-layer prediction, when combined, form the reconstructed reference-layer image; up-sampling the reference-layer residual using a first up-sampling operation; up-sampling the reference-layer prediction using a second up-sampling operation different from the first up-sampling operation; generating an inter-layer prediction using the up-sampled reference-layer residual and the up-sampled reference-layer prediction; and reconstructing the enhancement-layer image based upon the inter-layer prediction.

    摘要翻译： 描述用于编码和解码可伸缩视频的方法和装置。 在一个方面，描述了一种在视频解码器中使用层间预测在基于重构的参考层图像的基础上重建增强层图像的方法。 该方法包括重建参考层残差和参考层预测，其中当组合时参考层残差和参考层预测形成重建的参考层图像; 使用第一上采样操作对参考层残差进行上采样; 使用与第一上采样操作不同的第二上采样操作对参考层预测进行上采样; 使用上采样参考层残差和上采样参考层预测产生层间预测; 以及基于层间预测重构增强层图像。

    Modified coding for transform skipping
    9.
    发明公开
    Modified coding for transform skipping 有权
    修改编码转换跳过

    公开(公告)号：EP2680579A1

    公开(公告)日：2014-01-01

    申请号：EP12173938.7

    申请日：2012-06-27

    申请人： BlackBerry Limited

    发明人： He, Dake ,  Wang, Jing ,  Martin-Cocher, Gaëlle Christine

    IPC分类号： H04N7/26

    CPC分类号： H04N19/157 ,  H04N19/122 ,  H04N19/136 ,  H04N19/176

    摘要： Methods and devices for modified coding of blocks of residuals in the case of transform skipping. To better align the data with assumptions upon which the entropy coding scheme is based, the block of residual data is permuted at the encoder prior to entropy coding. The block of reconstructed data is then inverse permuted at the decoder to recover the reconstructed block of residuals. The permutation may include 180 rotation of the block, which may be of particular benefit in the case of intra-coded residuals.

    摘要翻译： 在变换跳过的情况下对残差块进行修改编码的方法和设备。 为了更好地将数据与熵编码方案所基于的假设对齐，残差数据块在熵编码之前在编码器处被置换。 然后在解码器处对经重构的数据块进行逆置换以恢复重构的残差块。 置换可以包括块的180次旋转，这在帧内编码残差的情况下可能是特别有利的。

    Motion vector sign bit hiding
    10.
    发明公开
    Motion vector sign bit hiding 有权
    运动矢量符号位隐藏

    公开(公告)号：EP2637409A1

    公开(公告)日：2013-09-11

    申请号：EP13157145.7

    申请日：2013-02-28

    申请人： BlackBerry Limited

    发明人： Campbell, Steven Wayne ,  He, Dake ,  Yu, Xiang ,  Wang, Jing

    IPC分类号： H04N7/36

    CPC分类号： H04N19/513 ,  H04N19/467 ,  H04N19/48 ,  H04N19/52

    摘要： Methods of encoding and decoding for video data for encoding or decoding motion vector difference components for inter-coded video are described. The sign of one of the components is hidden within the parity of the sum of the magnitudes of the horizontal and vertical difference components. The sign of the other of the components is explicitly signaled in the bitstream. The hidden sign may be assigned to the larger in magnitude of the two components. In other cases, the hidden sign may always be assigned to the horizontal or vertical component. In another case, the hidden sign may always be assigned to one component, unless that component is zero, in which case the hidden sign is assigned to the other component. In another case, both components may have their signs hidden, in which case the sign hiding is based on their respective parity, rather than the parity of their sum.

    摘要翻译： 描述了用于编码或解码帧间编码视频的运动矢量差分分量的视频数据的编码和解码方法。 其中一个分量的符号隐藏在水平和垂直差分量的总和的奇偶校验中。 另一个组件的符号在比特流中明确地发出信号。 隐藏的符号可以被分配给两个分量的较大量。 在其他情况下，可以将隐藏标志始终分配给水平或垂直分量。 在另一种情况下，隐藏标志可能会始终分配给一个组件，除非该组件为零，在这种情况下，将隐藏标志分配给另一个组件。 在另一种情况下，两个组件都可能隐藏其标志，在这种情况下，标志隐藏是基于它们各自的奇偶校验，而不是其总和的奇偶性。