公开(公告)号：US20150016512A1

公开(公告)日：2015-01-15

申请号：US14331166

申请日：2014-07-14

Applicant: QUALCOMM Incorporated

Inventor： Wei Pu ,  Woo-Shik Kim ,  Jianle Chen ,  Joel Sole Rojals ,  Liwei Guo ,  Chao Pang ,  Rajan Laxman Joshi ,  Marta Karczewicz

IPC: H04N19/186 ,  H04N19/176 ,  H04N19/147 ,  H04N19/105

CPC classification number: H04N19/147 ,  H04N19/105 ,  H04N19/176 ,  H04N19/186 ,  H04N19/61

Abstract: A device for decoding video data includes a memory configured to store video data, and at least one processor. The at least one processor may be configured to: determine luma residual samples for a block of video data, determine predictive chroma residual samples for the block of video data, scale the luma residual samples with a scale factor to produce scaled luma residual samples, and determine updated chroma residual samples based on the predictive chroma residual samples and the scaled luma residual samples.

Abstract translation: 用于解码视频数据的设备包括被配置为存储视频数据的存储器以及至少一个处理器。 所述至少一个处理器可以被配置为：确定视频数据块的亮度残差样本，确定视频数据块的预测色度残差样本，用比例因子缩放亮度残差样本以产生缩放的亮度残差样本，以及 基于预测色度残差样本和缩放的亮度残差样本确定更新的色度残差样本。

公开(公告)号：US20140064386A1

公开(公告)日：2014-03-06

申请号：US14017169

申请日：2013-09-03

Applicant: QUALCOMM Incorporated

Inventor： Jianle Chen ,  Liwei Guo ,  Xiang Li ,  Marta Karczewicz ,  Wei Pu

IPC: H04N7/26

CPC classification number: H04N19/30 ,  H04N19/117 ,  H04N19/187 ,  H04N19/33

Abstract: Methods and systems for video image coding are provided. Sets of filters may be selected and applied to video information at least partially based on phase displacement information between a first and second layer of video information. For example, the phase displacement information may correspond to a difference between a position of a pixel in the first layer and a corresponding position of the pixel in the second layer. The selected filter set can be an up-sampling filter or a down-sampling filter. The phase displacement information may be encoded as a syntax element embedded in the video bit stream.

Abstract translation: 提供了视频图像编码的方法和系统。 可以至少部分地基于第一和第二层视频信息之间的相位位移信息来选择并将其应用于视频信息。 例如，相位位移信息可以对应于第一层中的像素的位置与第二层中的像素的对应位置之间的差异。 所选择的滤波器组可以是上采样滤波器或下采样滤波器。 相位位移信息可以被编码为嵌入在视频比特流中的语法元素。

公开(公告)号：US20130272381A1

公开(公告)日：2013-10-17

申请号：US13863266

申请日：2013-04-15

Applicant: QUALCOMM INCORPORATED

Inventor： Liwei Guo ,  Xianglin Wang ,  Marta Karczewicz

IPC: H04N7/50

CPC classification number: H04N19/96 ,  H04N19/119 ,  H04N19/122 ,  H04N19/159 ,  H04N19/619

Abstract: In an example, a method of decoding video data includes determining a prediction partitioning structure for predicting pixel values associated with a block of video data. The method also includes determining a transform partitioning structure for applying one or more transforms to the predicted pixel values. Determining the transform split structure includes splitting a parent transform unit, upon determining the transform partitioning structure comprises splitting the parent transform unit into one or more square transforms, determining one or more square transforms such that each of the one or more square transforms correspond to exactly one prediction partition, and upon determining the transform partitioning structure comprises splitting the parent transform unit into one or more non-square transforms, determining whether to split the one or more non-square transforms based at least in part on the one or more non-square transforms being non-square.

Abstract translation: 在一个示例中，解码视频数据的方法包括确定用于预测与视频数据块相关联的像素值的预测分区结构。 该方法还包括确定用于将一个或多个变换应用于预测像素值的变换分割结构。 确定变换分割结构包括拆分父变换单元，在确定变换分割结构包括将父变换单元分解成一个或多个正方变换时，确定一个或多个正方变换，使得一个或多个正方变换中的每一个与精确对应 一个预测分区，并且在确定所述变换分割结构时，包括将所述父变换单元拆分为一个或多个非方变换，至少部分地基于所述一个或多个非平方变换确定是否分割所述一个或多个非方变换， 正方形变换为非正方形。

公开(公告)号：US20130266074A1

公开(公告)日：2013-10-10

申请号：US13739598

申请日：2013-01-11

Applicant: QUALCOMM INCORPORATED

Inventor： Liwei Guo ,  Xianglin Wang ,  Marta Karczewicz

IPC: H04N7/26

CPC classification number: H04N19/96 ,  H04N19/13 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/46 ,  H04N19/70

Abstract: A video encoder generates a bitstream that includes a residual quad tree (RQT) for a coding unit (CU). The CU is larger than a maximum-allowable transform unit (TU) size and the RQT includes a hierarchy of nodes. A root node of the RQT corresponds to the CU as a whole and leaf nodes of the RQT correspond to TUs of the CU. The root node is associated with a coded block flag (CBF) for a chroma component. The CBF for the chroma component indicates whether any of the TUs of the CU are associated with a significant coefficient block that is based on samples of the particular chroma component. A video decoder receives the bitstream and determines, based on the CBF, whether coefficient blocks associated with TUs that correspond to the leaf nodes include non-zero coefficients.

Abstract translation: 视频编码器生成包括用于编码单元（CU）的残余四叉树（RQT）的比特流。 CU大于最大允许变换单位（TU）大小，并且RQT包括节点层级。 RQT的根节点对应于CU，并且RQT的叶节点对应于CU的TU。 根节点与色度分量的编码块标志（CBF）相关联。 用于色度分量的CBF指示CU中的任何TU是否与基​​于特定色度分量的样本的显着系数块相关联。 视频解码器接收比特流并且基于CBF确定与叶节点对应的TU相关联的系数块是否包括非零系数。

公开(公告)号：US20130195199A1

公开(公告)日：2013-08-01

申请号：US13748257

申请日：2013-01-23

Applicant: QUALCOMM Incorporated

Inventor： Liwei Guo ,  Xianglin Wang ,  Marta Karczewicz

IPC: H04N7/26

CPC classification number: H04N19/91 ,  H04N19/463

Abstract: A video decoding device receives an array of transform coefficients for a chroma component of video data. The video decoding device receives entropy encoded data representing the value of a split flag associated with the chroma component. The value of the split flag indicates whether the array of transform coefficients is divided into smaller transform blocks. The video decoding device determines a context for the entropy encoded data representing the split flag. The context is based on the value of a split flag associated with another component of video data. The video decoding device entropy decodes the data representing the value of the split flag based on the determined context using context adaptive binary arithmetic coding (CABAC). The luma and chroma components have independent residual quadtree (RQT) structures.

Abstract translation: 视频解码装置接收视频数据的色度分量的变换系数的阵列。 视频解码装置接收表示与色度分量相关联的分割标志的值的熵编码数据。 分割标志的值指示变换系数的阵列是否被分割成更小的变换块。 视频解码装置确定表示分割标志的熵编码数据的上下文。 上下文基于与视频数据的另一个组件相关联的分割标志的值。 视频解码装置使用上下文自适应二进制算术编码（CABAC），基于所确定的上下文来熵解码表示分割标志的值的数据。 亮度和色度分量具有独立的残余四叉树（RQT）结构。

公开(公告)号：US20130128971A1

公开(公告)日：2013-05-23

申请号：US13682153

申请日：2012-11-20

Applicant: Qualcomm Incorporated

Inventor： Liwei Guo ,  Xianglin Wang ,  Marta Karczewicz

IPC: H04N7/26

CPC classification number: H04N19/159 ,  H04N19/122 ,  H04N19/176 ,  H04N19/186 ,  H04N19/61

Abstract: Aspects of this disclosure relate to coding video data. In an example, a method of coding video data includes determining a first residual quadtree (RQT) depth at which to apply one or more first transforms to residual video data based on at least one characteristic of the residual of video data. The method also includes determining a second RQT depth at which to apply one or more second transforms to the residual video data based on the at least one characteristic. The method also includes coding the residual video data using the one or more first transforms and the one or more second transforms.

Abstract translation: 本公开的方面涉及编码视频数据。 在一个示例中，视频数据编码的方法包括基于视频数据的剩余部分的至少一个特征来确定用于将一个或多个第一变换应用于残余视频数据的第一残余四叉树（RQT）深度。 所述方法还包括基于所述至少一个特征来确定用于将一个或多个第二变换应用于所述残余视频数据的第二RQT深度。 该方法还包括使用一个或多个第一变换和一个或多个第二变换对剩余视频数据进行编码。

公开(公告)号：US20130089145A1

公开(公告)日：2013-04-11

申请号：US13648121

申请日：2012-10-09

Applicant: QUALCOMM INCORPORATED

Inventor： Liwei Guo ,  Marta Karczewicz ,  Xianglin Wang

IPC: H04N7/32

CPC classification number: H04N19/11 ,  H04N19/122 ,  H04N19/147 ,  H04N19/176 ,  H04N19/46 ,  H04N19/61

Abstract: A video coder can be configured to determine an intra-prediction mode for a block of video data, identify a most probable transform based on the intra-prediction mode determined for the block of video data, and code an indication of whether the most probable transform is a transform used to encode the block of video data. The most probable transform can be a non-square transform.

Abstract translation: 视频编码器可以被配置为确定视频数据块的帧内预测模式，基于为视频数据块确定的帧内预测模式识别最可能的变换，并且编码最可能变换的指示 是用于对视频数据块进行编码的变换。 最可能的变换可以是非正方变换。

公开(公告)号：US11166016B2

公开(公告)日：2021-11-02

申请号：US16722033

申请日：2019-12-20

Applicant: Qualcomm Incorporated

Inventor： Liwei Guo ,  Marta Karczewicz ,  Xianglin Wang

IPC: H04N19/11 ,  H04N19/122 ,  H04N19/147 ,  H04N19/176 ,  H04N19/46 ,  H04N19/61

Abstract: A video coder can be configured to determine an intra-prediction mode for a block of video data, identify a most probable transform based on the intra-prediction mode determined for the block of video data, and code an indication of whether the most probable transform is a transform used to encode the block of video data. The most probable transform can be a non-square transform.

公开(公告)号：US10313682B2

公开(公告)日：2019-06-04

申请号：US14466407

申请日：2014-08-22

Applicant: QUALCOMM Incorporated

Inventor： Chao Pang ,  Liwei Guo ,  Jianle Chen ,  Rajan Laxman Joshi ,  Joel Sole Rojals ,  Marta Karczewicz

IPC: H04N19/593 ,  H04N19/82 ,  H04N19/176 ,  H04N19/70

Abstract: In general, techniques are described for performing an intra block copying process to code video data. A video decoding device that includes a memory and one or more processors may perform the techniques. The memory may be configured to store a current block of a picture. The processors may be configured to perform an intra block copying process to decode the current block using a prediction block that is from a same slice or a same tile as that in which the coded current block resides, the prediction block restricted to be within a search region that only includes the same slice or the same tile as that in which the coded current block resides.

公开(公告)号：US10021419B2

公开(公告)日：2018-07-10

申请号：US14327398

申请日：2014-07-09

Applicant: QUALCOMM Incorporated

Inventor： Marta Karczewicz ,  Joel Sole Rojals ,  Rajan Laxman Joshi ,  Liwei Guo

IPC: H04N7/12 ,  H04N19/91 ,  H04N19/60 ,  H04N19/176 ,  H04N19/13 ,  H04N19/136

CPC classification number: H04N19/60 ,  H04N19/13 ,  H04N19/136 ,  H04N19/176 ,  H04N19/91

Abstract: Techniques are described for initializing a Rice parameter used to define codes for coefficient level coding. According to the techniques, the initial value of the Rice parameter is determined for a coefficient group (CG) in a transform block of video data based on statistics of coefficient levels that are gathered for previously coded coefficients of the video data. The statistics may be statistics of absolute values of coefficient levels or remaining absolute values of coefficient levels of previously coded coefficients. A value of the statistics may be initialized to zero at a beginning of a video slice and updated based on coefficient levels coded in each CG of the slice. The statistics may be updated once per CG. In some cases, statistics may be gathered separately for each of a plurality of different categories of CGs that are defined based on characteristics of transform blocks that include the CGs.