公开(公告)号：EP3152905A2

公开(公告)日：2017-04-12

申请号：EP15731783.5

申请日：2015-06-09

申请人： Qualcomm Incorporated

发明人： THIRUMALAI, Vijayaraghavan ,  JACOBSON, Natan Haim ,  JOSHI, Rajan Laxman

IPC分类号： H04N19/176 ,  H04N19/119 ,  H04N19/46 ,  H04N19/13 ,  H04N19/91 ,  H04N19/132 ,  H04N19/136 ,  H04N19/186 ,  H04N19/157

CPC分类号： H04N19/91 ,  H04N19/105 ,  H04N19/119 ,  H04N19/13 ,  H04N19/132 ,  H04N19/136 ,  H04N19/157 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/46

摘要： Entropy coding techniques for display stream compression (DSC) are disclosed. In one aspect, a method of entropy coding video data includes partitioning a block of the video data into a plurality of groups of samples based at least in part on a coding mode of the block. The method further includes entropy coding the block via performing a group-wise skip on at least one of the groups in response to all of the samples in the at least one group being equal to a predetermined value.

摘要翻译： 公开了用于显示流压缩（DSC）的熵编码技术。 一方面，一种对视频数据进行熵编码的方法包括至少部分地基于块的编码模式将视频数据的块划分成多个采样组。 所述方法还包括：响应于所述至少一个组中的所有样本等于预定值，通过对所述组中的至少一个组执行基于组的跳跃来对所述块进行熵编码。

公开(公告)号：EP3146725A1

公开(公告)日：2017-03-29

申请号：EP15731750.4

申请日：2015-05-22

申请人： Qualcomm Incorporated

发明人： JOSHI, Rajan Laxman ,  SEREGIN, Vadim ,  PU, Wei ,  KARCZEWICZ, Marta ,  SOLE ROJALS, Joel ,  RAPAKA, Krishnakanth

IPC分类号： H04N19/70 ,  H04N19/463 ,  H04N19/93 ,  H04N19/176 ,  H04N19/186

CPC分类号： H04N19/583 ,  H04N19/132 ,  H04N19/176 ,  H04N19/186 ,  H04N19/44 ,  H04N19/463 ,  H04N19/70 ,  H04N19/93

摘要： In an example, a method of processing video data includes determining a value of a block-level syntax element that indicates, for all samples of a block of video data, whether at least one respective sample of the block is coded based on a color value of the at least one respective sample not being included in a palette of colors for coding the block of video data. The method also includes coding the block of video data based on the value.

摘要翻译： 在一个示例中，一种处理视频数据的方法包括确定块级语法元素的值，该块级语法元素指示对于视频数据块的所有采样，基于颜色值是否对该块的至少一个相应样本进行编码 所述至少一个相应样本不包括在用于对所述视频数据块进行编码的颜色调色板中。 该方法还包括基于该值对视频数据块进行编码。

公开(公告)号：EP3146717A1

公开(公告)日：2017-03-29

申请号：EP15729623.7

申请日：2015-05-22

申请人： Qualcomm Incorporated

发明人： SEREGIN, Vadim ,  JOSHI, Rajan Laxman ,  KARCZEWICZ, Marta ,  PU, Wei ,  SOLE ROJALS, Joel

IPC分类号： H04N19/176 ,  H04N19/105 ,  H04N19/186 ,  H04N19/157

CPC分类号： H04N19/50 ,  H04N19/105 ,  H04N19/119 ,  H04N19/157 ,  H04N19/176 ,  H04N19/186 ,  H04N19/96

摘要： In an example a method of processing video data includes determining a first palette for a first block of video data that is located in a first row of blocks, generating a predictor palette for constructing at least one second palette of at least one second block of video data in the first row of blocks coded, reinitializing the predictor palette for determining a third palette of a third block of video data that is located in a second row of blocks, wherein re-initializing the predictor palette comprises re-initializing the predictor palette based on the one or more palette entries of the first palette or an initial predictor palette generated after coding the first block, determining the third palette of the third block based on the re-initialized predictor palette, and coding the third block using the third palette.

摘要翻译： 在一个示例中，处理视频数据的方法包括确定位于第一行块中的第一视频数据块的第一调色板，产生用于构建至少一个第二视频块的至少一个第二调色板的预测器调色板 编码的第一行块中的数据，重新初始化预测器调色板，用于确定位于第二行块中的第三视频数据块的第三调色板，其中重新初始化预测器调色板包括基于预测器调色板重新初始化 在第一调色板的一个或多个调色板条目或在编码第一块之后生成的初始预测器调色板，基于重新初始化的预测器调色板确定第三块的第三调色板，并使用第三调色板对第三块进行编码。

公开(公告)号：EP3011743A2

公开(公告)日：2016-04-27

申请号：EP14740045.1

申请日：2014-06-20

申请人： Qualcomm Incorporated

发明人： GUO, Liwei ,  PANG, Chao ,  KIM, Woo-Shik ,  PU, Wei ,  SOLE ROJALS, Joel ,  JOSHI, Rajan Laxman ,  KARCZEWICZ, Marta

IPC分类号： H04N19/463 ,  H04N19/593

CPC分类号： H04N19/52 ,  H04N19/105 ,  H04N19/154 ,  H04N19/176 ,  H04N19/186 ,  H04N19/513 ,  H04N19/523 ,  H04N19/55 ,  H04N19/563 ,  H04N19/593 ,  H04N19/70 ,  H04N19/82

摘要： Techniques coding video data, including a mode for intra prediction of blocks of video data from predictive blocks of video data within the same picture, may include determining a predictive block of video data for the current block of video data, wherein the predictive block of video data is a reconstructed block of video data within the same picture as the current block of video data. A two-dimensional vector, which may be used by a video coder to identify the predictive block of video data, includes a horizontal displacement component and a vertical displacement component relative to the current block of video data. The mode for intra prediction of blocks of video data from predictive blocks of video data within the same picture may be referred to as Intra Block Copy or Intra Motion Compensation.

摘要翻译： 编码视频数据的技术（包括用于来自相同图片内的视频数据的预测性块的视频数据块的帧内预测的模式）可包含确定当前视频数据块的视频数据的预测性块，其中视频数据的预测性块 数据是与当前视频数据块在相同图片内的重建的视频数据块。 可由视频译码器用以识别视频数据的预测性块的二维向量包括相对于当前视频数据块的水平位移分量和垂直位移分量。 用于来自同一图片内的视频数据的预测块的视频数据块的帧内预测的模式可被称为帧内块复制或帧内运动补偿。

公开(公告)号：EP2984830A2

公开(公告)日：2016-02-17

申请号：EP14722509.8

申请日：2014-04-11

申请人： Qualcomm Incorporated

发明人： SOLE ROJALS, Joel ,  KARCZEWICZ, Marta ,  JOSHI, Rajan Laxman

IPC分类号： H04N19/13 ,  H04N19/91 ,  H04N19/176 ,  H04N19/156

CPC分类号： H04N19/13 ,  H04N19/156 ,  H04N19/176 ,  H04N19/44 ,  H04N19/60 ,  H04N19/91

摘要： Techniques are described for updating a value of a Rice parameter used to define Golomb codes for coefficient level coding. The Golomb codes defined by the Rice parameter may be used to code a remaining absolute value of a coefficient level for at least one coefficient in a coefficient group (CG). According to the techniques, the value of the Rice parameter is updated based on a selection of a minimum of either a maximum value of the Rice parameter or a variable increment of the value of the Rice parameter. The variable increment is determined based on the value of the Rice parameter and an absolute value of the coefficient level for the current coefficient being coded. Techniques are also described for adjusting the value of the Rice parameter used to define Golomb codes for coefficient level coding based on whether a transform is applied to a transform block.

公开(公告)号：EP2896206A1

公开(公告)日：2015-07-22

申请号：EP13765608.8

申请日：2013-09-13

申请人： QUALCOMM INCORPORATED

发明人： VAN DER AUWERA, Geert ,  JOSHI, Rajan Laxman ,  KARCZEWICZ, Marta

IPC分类号： H04N19/00

CPC分类号： H04N19/00909 ,  H04N19/463 ,  H04N19/70 ,  H04N19/86 ,  H04N19/96

摘要： A method of encoding video data includes encoding a quantization parameter delta value in a coding unit (CU) of the video data before coding a version of a block of the CU in a bitstream so as to facilitate deblocking filtering. Coding the quantization parameter delta value may comprise coding the quantization parameter delta value based on the value of a no_residual_syntax flag that indicates whether no blocks of the CU have residual transform coefficients.

摘要翻译： 一种编码视频数据的方法包括在将比特流中的CU的块的版本编码之前对视频数据的编码单位（CU）中的量化参数德耳塔值进行编码，以便于解块滤波。 编码量化参数增量值可以包括基于指示CU的块是否具有残余变换系数的无残留语法标志的值来对量化参数增量值进行编码。

公开(公告)号：EP2868081A1

公开(公告)日：2015-05-06

申请号：EP13734279.6

申请日：2013-06-24

申请人： Qualcomm Incorporated

发明人： RAMASUBRAMONIAN, Adarsh Krishnan ,  WANG, Ye-Kui ,  JOSHI, Rajan Laxman ,  CHEN, Ying

IPC分类号： H04N7/00

CPC分类号： H04N19/44 ,  H04N19/196 ,  H04N19/463 ,  H04N19/573 ,  H04N19/58 ,  H04N19/70

摘要： A video decoder may be configured to decode a first value representative of a difference between a base most significant bits (MSBs) value of a picture order count (POC) value of a current picture of video data and a first MSBs value of a first POC value of a first long-term reference picture of the video data, decode a second value representative of a difference between a second MSBs value of a second POC value of a second long-term reference picture of the video data and the first MSBs value, wherein the first POC value and the second POC value have different least significant bits values, and decode at least a portion of a current picture of the video data relative to at least one of the first long-term reference picture and the second long-term reference picture.

公开(公告)号：EP2820845A1

公开(公告)日：2015-01-07

申请号：EP13710220.8

申请日：2013-03-01

申请人： Qualcomm Incorporated

发明人： SOLE ROJALS, Joel ,  JOSHI, Rajan Laxman ,  CHIEN, Wei-Jung ,  SEREGIN, Vadim ,  CHEN, Jianle ,  KARCZEWICZ, Marta

IPC分类号： H04N7/26

CPC分类号： H04N19/129 ,  H04N19/13 ,  H04N19/134 ,  H04N19/18 ,  H04N19/436 ,  H04N19/91

摘要： A video coding process that includes defining a context derivation neighborhood for one of a plurality of transform coefficients based on a transform coefficient scan order. The process also includes determining a context for the one of the plurality of transform coefficients based on the context derivation neighborhood. The process also includes coding the one of the plurality of transform coefficients based on the determined context.

公开(公告)号：EP2777263A1

公开(公告)日：2014-09-17

申请号：EP12788057.3

申请日：2012-11-07

申请人： QUALCOMM INCORPORATED

发明人： JOSHI, Rajan Laxman ,  KARCZEWICZ, Marta

IPC分类号： H04N7/26

CPC分类号： H04N19/463 ,  H04N19/126 ,  H04N19/157 ,  H04N19/18

摘要： The techniques of this disclosure may be generally related to signaling values of a quantization matrix. In some examples, coefficient values in the quantization matrix may be downsampled with different factors based on where the coefficient values are located in the quantization matrix.

公开(公告)号：EP2727350A1

公开(公告)日：2014-05-07

申请号：EP12733831.7

申请日：2012-06-29

申请人： Qualcomm Incorporated

发明人： SOLE ROJALS, Joel ,  JOSHI, Rajan Laxman ,  KARCZEWICZ, Marta

IPC分类号： H04N7/26

CPC分类号： H04N19/60 ,  H04N19/129 ,  H04N19/13 ,  H04N19/176 ,  H04N19/18 ,  H04N19/45 ,  H04N19/625 ,  H04N19/91 ,  H04N19/93 ,  H04W88/02

摘要： Disclosed are techniques for coding coefficients of a video block having a nonsquare shape defined by a width and a height, comprising coding one or more of x- and y-coordinates that indicate a position of a last non-zero coefficient within the block according to an associated scanning order, including coding each coordinate by determining one or more contexts used to code the coordinate based on one of the width and the height that corresponds to the coordinate, and coding the coordinate by performing a context adaptive entropy coding process based on the contexts. Also disclosed are techniques for coding information that identifies positions of non-zero coefficients within the block, including determining one or more contexts used to code the information based on one or more of the width and the height, and coding the information by performing a context adaptive entropy coding process based on the contexts.