公开(公告)号：US09397694B2

公开(公告)日：2016-07-19

申请号：US13874549

申请日：2013-05-01

申请人： Research In Motion Limited

发明人： Dake He ,  Jing Wang

IPC分类号： H03M7/00 ,  H03M7/40 ,  H03M7/30

CPC分类号： H03M7/40 ,  H03M7/3075 ,  H03M7/3079

摘要： Methods and devices are described for entropy coding data using an entropy coder to encode quantized transform domain coefficient data. Last significant coefficient information is signaled in the bitstream using two-dimensional coordinates for the last significant coefficient. The context for bins of one of the coordinates is based, in part, upon the value of the other of the coordinates. In one case, instead of signaling last significant coefficient information, the number of non-zero coefficients is binarized and entropy encoded.

公开(公告)号：US09854235B2

公开(公告)日：2017-12-26

申请号：US13777079

申请日：2013-02-26

申请人： RESEARCH IN MOTION LIMITED

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

IPC分类号： H04N7/26 ,  H04N19/61 ,  H04N19/176 ,  H04N19/70 ,  H04N19/30 ,  H04N19/13 ,  H04N19/91 ,  H04N19/18 ,  H04N19/187 ,  H03M7/40 ,  H03M7/30 ,  H04N19/597 ,  H04N19/129 ,  H04N19/59

CPC分类号： H04N19/174 ,  H03M7/3079 ,  H03M7/4018 ,  H04N19/129 ,  H04N19/13 ,  H04N19/176 ,  H04N19/18 ,  H04N19/187 ,  H04N19/30 ,  H04N19/59 ,  H04N19/597 ,  H04N19/61 ,  H04N19/70 ,  H04N19/91

摘要： Methods and devices for decoding, in a video decoder, a block of enhancement-layer transform domain data for an enhancement-layer encoded video and corresponding to a reconstructed block of reference-layer transform domain data, are provided. The method includes determining a context for an enhancement-layer element based, at least in part, upon elements in the corresponding reconstructed block of reference-layer transform domain data, wherein the elements are identified by a template and wherein the position of the template in the reference-layer reconstructed block is based upon the position of that enhancement-layer element in the block of enhancement-layer transform domain data.

公开(公告)号：US09363512B2

公开(公告)日：2016-06-07

申请号：US13774199

申请日：2013-02-22

申请人： Research In Motion Limited

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

IPC分类号： H04N7/12 ,  H04N11/02 ,  H04N19/51 ,  H04N19/52 ,  H04N19/513 ,  H04N19/48 ,  H04N19/467

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： 描述用于编码或解码用于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。 其中一个组件的符号隐藏在水平和垂直差分分量的大小之和的奇偶校验之内。 在比特流中明确地显示了其他组件的符号。 隐藏的符号可以分配给两个组件的较大的大小。 在其他情况下，隐藏的标志总是可以分配给水平或垂直分量。 在另一种情况下，隐藏的符号总是可以分配给一个组件，除非该组件为零，在这种情况下，隐藏的符号被分配给另一个组件。 在另一种情况下，两个组件可能会隐藏其标志，在这种情况下，标识隐藏是基于它们各自的奇偶性而不是它们的和的奇偶校验。

公开(公告)号：US08942495B2

公开(公告)日：2015-01-27

申请号：US13681551

申请日：2012-11-20

申请人： Research In Motion Limited

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

IPC分类号： G06K9/62 ,  G06T9/00 ,  H04N19/117 ,  H04N19/19 ,  H04N19/625 ,  H04N19/82

CPC分类号： H04N19/117 ,  G06T9/004 ,  H04N19/19 ,  H04N19/50 ,  H04N19/60 ,  H04N19/625 ,  H04N19/82

摘要： Methods and devices for encoding and decoding data using transform domain filtering are described. The encoder determines a set of transform domain filter coefficients to be applied to a transform domain prediction. The filtering may, in some cases, also apply to transform domain reconstructions. Rate-distortion optimization may be used to determine the optimal filter coefficients on a frame-basis, coding-unit-basis, or other basis. Multiple filters may be developed and communicated from the encoder to the decoder for different combinations of transform block size, coding mode, prediction mode, and texture type. In other cases, the filtering is applied in the pixel-domain to a pixel-domain prediction or a pixel-domain reconstruction of a block of samples.

摘要翻译： 描述了使用变换域过滤对数据进行编码和解码的方法和设备。 编码器确定要应用于变换域预测的一组变换域滤波器系数。 在某些情况下，过滤可能也适用于变换域重建。 可以使用速率失真优化来确定基于帧，基于编码单位或其它基础的最佳滤波器系数。 可以针对变换块大小，编码模式，预测模式和纹理类型的不同组合，从编码器开发多个滤波器并将其传送到解码器。 在其他情况下，将滤波在像素域中应用于像素域预测或样本块的像素域重构。