公开(公告)号：US20150003518A1

公开(公告)日：2015-01-01

申请号：US13930089

申请日：2013-06-28

申请人： RESEARCH IN MOTION LIMITED

发明人： Nguyen NGUYEN ,  Dake HE ,  David FLYNN

IPC分类号： H04N19/126 ,  H04N19/182 ,  H04N19/136

CPC分类号： H04N19/134 ,  H04N19/126 ,  H04N19/176 ,  H04N19/186 ,  H04N19/46

摘要： Methods of encoding and decoding video in a low-fidelity mode are described. A coding unit level low-fidelity flag is present in the bitstream to signal whether low-fidelity mode is enabled for a particular coding unit or not. If enabled, then, for that coding unit, the chroma quantization parameter is determined using the luma quantization parameter adjusted by a low-fidelity-mode offset. If not enabled, then, for that coding unit, the chroma quantization parameter is determined using the luma quantization parameter without adjustment by the low-fidelity-mode offset. The chroma quantization parameter is then used in the scaling of quantized chroma transform domain coefficients. Use with luma or other video components is also proposed.

摘要翻译： 描述以低保真模式对视频进行编码和解码的方法。 比特流中存在编码单元级低保真标志，以指示是否为特定编码单元启用低保真模式。 如果启用，则对于该编码单元，使用由低保真度模式偏移调整的亮度量化参数来确定色度量化参数。 如果没有使能，则对于该编码单元，使用亮度量化参数来确定色度量化参数，而不通过低保真度模式偏移进行调整。 色度量化参数然后用于量化色度变换域系数的缩放。 还提出使用亮度或其他视频组件。

公开(公告)号：US20140362905A1

公开(公告)日：2014-12-11

申请号：US13914670

申请日：2013-06-11

申请人： RESEARCH IN MOTION LIMITED

发明人： Nguyen NGUYEN ,  Dake HE

IPC分类号： H04N19/126

CPC分类号： H04N19/126 ,  H04N19/14 ,  H04N19/157 ,  H04N19/18 ,  H04N19/593

摘要： Methods of encoding and decoding video are described. The methods for encoding and decoding a picture partitioned into blocks include determining an activity rank for a block, based on a block size of the block and an intra-coding mode for the block; calculating a normalization value based on the activity rank divided by an average activity rank determined over a plurality of previously-encoded/decoded blocks; and quantizing/dequantizing a set of transform domain coefficients for the block using a quantization step size adjusted by the normalization value.

摘要翻译： 描述编码和解码视频的方法。 用于编码和解码分割成块的图像的方法包括：基于块的块大小和块的帧内编码模式来确定块的活动等级; 基于活动秩除以由多个先前编码/解码的块确定的平均活动等级来计算归一化值; 以及使用由归一化值调整的量化步长来量化/去量化块的变换域系数集合。

公开(公告)号：US20140003488A1

公开(公告)日：2014-01-02

申请号：US13775286

申请日：2013-02-25

申请人： RESEARCH IN MOTION LIMITED

发明人： Tianying JI ,  Xiang YU ,  Dake HE

IPC分类号： H04N7/26

CPC分类号： H04N19/134 ,  H04N19/70

摘要： Methods of encoding and decoding for video data for encoding or decoding a sequence of greater-than-one flags for a coefficient group are provided. Context-based encoding and decoding selects a context for encoding or decoding the greater-than-one flag based upon the position of the greater-than-one flag in the sequence of greater-than-one flags. Selection of the context may also be based upon the position of the last-non-zero coefficient in the coefficient group.

摘要翻译： 提供了用于编码或解码用于系数组的大于一个标志的序列的视频数据的编码和解码方法。 基于上下文的编码和解码基于大于一个标志的序列中的大于1的标志的位置来选择用于对大于1的标记进行编码或解码的上下文。 上下文的选择也可以基于系数组中最后非零系数的位置。

公开(公告)号：US20130235936A1

公开(公告)日：2013-09-12

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： H04N7/26

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，隐藏的符号总是被分配给一个组件，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：US20140064365A1

公开(公告)日：2014-03-06

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

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.

摘要翻译： 在视频解码器中，解码用于增强层编码视频的增强层变换域数据块并与重构的参考层变换域数据块对应的方法和装置。 该方法包括至少部分地基于参考层转换域数据的对应的重建块中的元素来确定增强层元素的上下文，其中元素由模板识别，并且其中模板的位置 参考层重建块基于该增强层元素在增强层变换域数据块中的位置。

公开(公告)号：US20140064364A1

公开(公告)日：2014-03-06

申请号：US13776755

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

CPC分类号： H04N19/503 ,  H04N19/187 ,  H04N19/33 ,  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： 描述了用于编码和解码可缩放视频的方法和设备。 在一个方面中，描述了一种在视频解码器中使用层间预测基于重构的参考层图像来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; 以及基于层间预测来重构增强层图像。

公开(公告)号：US20130235940A1

公开(公告)日：2013-09-12

申请号：US13871015

申请日：2013-04-26

申请人： RESEARCH IN MOTION LIMITED

发明人： Nguyen NGUYEN ,  Tianying JI ,  Dake HE

IPC分类号： H04N7/30

CPC分类号： H04N19/60 ,  H04N19/13 ,  H04N19/176 ,  H04N19/18 ,  H04N19/196 ,  H04N19/463

摘要： Methods of encoding and decoding for video data are described for encoding or decoding coefficients for a transform unit. In particular, the significant-coefficient flags for a coefficient group are encoded and decoded based upon a context determination, and the context is determined based upon the values of neighboring flags. The neighborhood used to determine the context varies depending on whether the significant-coefficient flag to be encoded or decoded is in the right column or bottom row of the coefficient group or not. If it is in the right column or bottom row one of the alternative context neighborhoods is used to avoid relying on significant-coefficient flags in other coefficient groups except for the flags immediately adjacent the right border and bottom border of the coefficient group, and the flag diagonally to the lower-right.

摘要翻译： 描述了用于视频数据的编码和解码的方法，用于对变换单元的系数进行编码或解码。 特别地，基于上下文确定对系数组的有效系数标志进行编码和解码，并且基于相邻标志的值确定上下文。 用于确定上下文的邻域取决于要编码或解码的有效系数标志是否在系数组的右列或底行。 如果它在右列或底行中，则使用替代上下文邻域之一来避免依赖于除系数组的右边界和底边界之外的标志紧邻的其他系数组中的有效系数标志，并且标志 对角线到右下角。

公开(公告)号：US20140355675A1

公开(公告)日：2014-12-04

申请号：US13904062

申请日：2013-05-29

申请人： RESEARCH IN MOTION LIMITED

发明人： Dake HE ,  Nguyen NGUYEN ,  Gaëlle Christine MARTIN-COCHER ,  David FLYNN

IPC分类号： H04N19/50

CPC分类号： H04N19/50 ,  H04N19/117 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46 ,  H04N19/82

摘要： Methods of encoding and decoding media, for example video, using conditional reconstruction refinement are described. The encoding and decoding relies upon predictions that are based on previously encoded and decoded samples. Prediction information identifies the previously reconstructed samples upon which a prediction is to be based and is available to both the encoder and decoder. On the basis that a previously-reconstructed sample is going to be used as source data for a prediction, the encoder refines that reconstructed sample, uses the refined reconstructed sample for the prediction, and encodes refinement data to enable the decoder to also refine the previously-reconstructed sample during decoding. In some cases, a reconstructed sample may be refined more than once. Various flags or bits may be used to signal when refinement is enabled or disabled and may be signaled at various hierarchical points in the coding structure.

摘要翻译： 描述使用条件重构细化来对介质（例如视频）进行编码和解码的方法。 编码和解码依赖于基于先前编码和解码的样本的预测。 预测信息识别先前重建的样本，预测将基于该样本，并且可用于编码器和解码器。 在先前重建的样本将被用作预测的源数据的基础上，编码器精炼该重构样本，使用精确的重构样本进行预测，并且对细化数据进行编码以使解码器能够先前改进 - 解码过程中重构样本。 在某些情况下，重建的样本可能会被多次精炼。 可以使用各种标志或位来在细化被启用或禁用时发出信号，并且可以在编码结构中的各个分层点发信号通知。

公开(公告)号：US20140192862A1

公开(公告)日：2014-07-10

申请号：US13735782

申请日：2013-01-07

申请人： RESEARCH IN MOTION LIMITED

发明人： David FLYNN ,  Dake HE

IPC分类号： H04N7/26

CPC分类号： H04N19/50 ,  H04N19/117 ,  H04N19/176 ,  H04N19/186 ,  H04N19/44 ,  H04N19/46 ,  H04N19/503 ,  H04N19/593 ,  H04N19/82

摘要： Methods of encoding and decoding video, in particular chroma components, using filtered predictions, are described. An intra or inter predicted block is first filtered before being used to determine residual data at the encoder or to reconstruct chroma data at the decoder. The filtering tends to be low-pass filtering, which removes high-frequency components from the prediction block. The encoder signals the use of the filter to the decoder by including a filtered-prediction flag for each coding unit, or other region within a picture, that has been subject to prediction filtering. The syntax may provide that only coding units above a threshold size have an associated filtered-prediction flag; smaller coding units are governed by a filtered-prediction flag sent in connection with a higher node in the coding tree block.

摘要翻译： 描述了使用滤波预测对视频，特别是色度分量进行编码和解码的方法。 在用于确定编码器处的残差数据或在解码器处重构色度数据之前，首先对帧内或帧内预测块进行滤波。 滤波往往是低通滤波，其从预测块中去除高频分量。 编码器通过对已经进行预测过滤的每个编码单元或图像内的其他区域包括滤波预测标志，向滤波器通知滤波器的使用。 语法可以规定，仅高于阈值大小的编码单元具有相关联的滤波预测标志; 较小的编码单元由与编码树块中的较高节点相关联地发送的滤波预测标志来管理。

公开(公告)号：US20130272384A1

公开(公告)日：2013-10-17

申请号：US13775284

申请日：2013-02-25

申请人： RESEARCH IN MOTION LIMITED

发明人： Xiang YU ,  Jing WANG ,  Dake HE

IPC分类号： H04N7/26

CPC分类号： H04N19/129 ,  H04N19/124 ,  H04N19/61 ,  H04N19/91

摘要： Methods and devices for reconstructing coefficient levels from a bitstream of encoded video data for a coefficient group in a transform unit, and corresponding methods and devices for encoding are provided. The method of reconstructing includes, for each of the non-zero coefficients in the coefficient group, in scan order, decoding a greater-than-one flag for that non-zero coefficient if fewer than two previously-decoded greater-than-one flags for that coefficient group are equal to one. The coefficient levels for the non-zero coefficients are reconstructed based, at least in part, upon the decoded greater-than-one flags.

摘要翻译： 提供了用于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，以及用于编码的相应方法和装置。 重建方法对于系数组中的每个非零系数包括扫描顺序，如果少于两个先前解码的大于1的标志，则对于该非零系数解码大于一个标志 该系数组等于1。 至少部分地基于解码的大于1的标记来重构非零系数的系数级别。