公开(公告)号：US20150063440A1

公开(公告)日：2015-03-05

申请号：US14472134

申请日：2014-08-28

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/105 ,  H04N19/176 ,  H04N19/174 ,  H04N19/159

CPC classification number: H04N19/105 ,  H04N19/159 ,  H04N19/174 ,  H04N19/176 ,  H04N19/593 ,  H04N19/61

Abstract: A method of encoding video data includes determining that a current block of video data is to be encoded using an intra block copy (BC) mode and constrained intra prediction, determining one or more reference blocks that may be used for encoding the current block using the intra BC mode, wherein each of the one or more reference blocks is encoded with an intra prediction mode, and encoding the current block of video data using the intra BC mode and at least one of the determined one or more reference blocks.

Abstract translation: 一种编码视频数据的方法包括：使用块内复制（BC）模式和约束的帧内预测来确定视频数据的当前块要被编码，确定一个或多个参考块，其可以用于使用 在BC内模式中，其中一个或多个参考块中的每一个被以帧内预测模式编码，并且使用帧内BC模式和所确定的一个或多个参考块中的至少一个对当前视频数据块进行编码。

公开(公告)号：US20150055703A1

公开(公告)日：2015-02-26

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

CPC classification number: H04N19/176 ,  H04N19/593 ,  H04N19/70 ,  H04N19/82

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.

Abstract translation: 通常，描述了执行块内复制处理以对视频数据进行编码的技术。 包括存储器和一个或多个处理器的视频解码装置可以执行这些技术。 存储器可以被配置为存储图片的当前块。 处理器可以被配置为执行块内复制处理，以使用来自与编码的当前块所在的相同片或相同片的预测块来解码当前块，预测块被限制在搜索范围内 区域，其仅包括与编码的当前块所在的相同的片或相同的片。

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：US20140307777A1

公开(公告)日：2014-10-16

申请号：US14270162

申请日：2014-05-05

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/129 ,  H04N19/18 ,  H04N19/167 ,  H04N19/61

CPC classification number: H04N19/129 ,  H04N19/00109 ,  H04N19/13 ,  H04N19/136 ,  H04N19/167 ,  H04N19/176 ,  H04N19/18 ,  H04N19/196 ,  H04N19/436 ,  H04N19/463 ,  H04N19/60 ,  H04N19/61 ,  H04N19/619 ,  H04N19/70 ,  H04N19/91

Abstract: This disclosure describes devices and methods for coding transform coefficients associated with a block of residual video data in a video coding process. Aspects of this disclosure include the selection of a scan order for both significance map coding and level coding, as well as the selection of contexts for entropy coding consistent with the selected scan order. This disclosure proposes a harmonization of the scan order to code both the significance map of the transform coefficients as well as to code the levels of the transform coefficient. It is proposed that the scan order for the significance map should be in the inverse direction (i.e., from the higher frequencies to the lower frequencies). This disclosure also proposes that transform coefficients be scanned in sub-sets as opposed to fixed sub-blocks. In particular, transform coefficients are scanned in a sub-set consisting of a number of consecutive coefficients according to the scan order.

Abstract translation: 本公开描述了用于编码与视频编码过程中的残留视频数据块相关联的变换系数的装置和方法。 本公开的方面包括选择重要性地图编码和级别编码的扫描顺序，以及与所选择的扫描顺序一致的用于熵编码的上下文的选择。 本公开提出了对扫描顺序进行协调以编码变换系数的重要性图以及对变换系数的等级进行编码。 提出，显着图的扫描顺序应该在相反方向（即，从较高频率到较低频率）。 本公开还提出了与固定子块相反的子集中的变换系数的扫描。 具体地，根据扫描顺序，在由多个连续系数组成的子集中扫描变换系数。

公开(公告)号：US20140286413A1

公开(公告)日：2014-09-25

申请号：US14223955

申请日：2014-03-24

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/61 ,  H04N19/90 ,  H04N19/46

CPC classification number: H04N19/467 ,  H04N19/436 ,  H04N19/593 ,  H04N19/70

Abstract: A video coder may determine that sign data hiding is disabled for a current block if the current block is generated using lossy coding without application of a transform to residual data and the current block is intra predicted using an intra prediction mode in which a residual differential pulse code modulation (DPCM) technique is used.

Abstract translation: 如果使用有损编码生成当前块而不对剩余数据进行变换，则视频编码器可以确定对当前块禁止符号数据隐藏，并且使用其中残差差分脉冲的帧内预测模式来对当前块进行帧内预测 使用码调制（DPCM）技术。

公开(公告)号：US20130188699A1

公开(公告)日：2013-07-25

申请号：US13744086

申请日：2013-01-17

Applicant: QUALCOMM INCORPORATED

Inventor： Rajan Laxman Joshi ,  Jianle Chen ,  Wei-Jung Chien ,  Vadim Seregin ,  Joel Sole Rojals ,  Marta Karczewicz

IPC: H04N7/26

CPC classification number: H04N19/103 ,  H03M7/4006 ,  H04N19/102 ,  H04N19/129 ,  H04N19/13 ,  H04N19/134 ,  H04N19/176 ,  H04N19/18 ,  H04N19/42 ,  H04N19/50 ,  H04N19/70

Abstract: A video encoder performs multiple coding passes on coefficients in a coefficient block. During each coding pass, the video encoder encodes a different set of syntax elements for coefficients in the coefficient block. A video decoder uses the syntax elements for a coefficient to determine the value of the coefficient. When the video encoder performs a coding pass, the video encoder selects a coding context for a syntax element based at least in part on a syntax element generated in an earlier coding pass for a non-causal coefficient and based at least in part on a value of a syntax element generated during the current coding pass for a causal coefficient. The video encoder entropy encodes the syntax element based on the selected coding context. A video decoder performs a similar series of coding passes in which the video decoder selects coding contexts and entropy decodes the syntax elements.

Abstract translation: 视频编码器对系数块中的系数进行多次编码。 在每个编码通过期间，视频编码器对系数块中的系数的不同语法元素集进行编码。 视频解码器使用用于系数的语法元素来确定系数的值。 当视频编码器执行编码通过时，视频编码器至少部分地基于在非因果系数的较早的编码路径中生成的语法元素来选择用于语法元素的编码上下文，并且至少部分地基于值 在当前编码过程中产生的语法元素是因果系数。 视频编码器基于所选择的编码上下文对语法元素进行熵编码。 视频解码器执行类似的一系列编码遍，其中视频解码器选择编码上下文，并对语法元素进行熵解码。

公开(公告)号：US20130114695A1

公开(公告)日：2013-05-09

申请号：US13670011

申请日：2012-11-06

Applicant: Qualcomm Incorporated

Inventor： Rajan Laxman Joshi ,  Marta Karczewicz

IPC: H04N7/26

CPC classification number: H04N19/463 ,  H04N19/126 ,  H04N19/157 ,  H04N19/18

Abstract: 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.

Abstract translation: 本公开的技术通常可以与量化矩阵的信令值有关。 在一些示例中，量化矩阵中的系数值可以基于系数值位于量化矩阵中的哪里不同的因素进行下采样。

公开(公告)号：US20130101033A1

公开(公告)日：2013-04-25

申请号：US13649836

申请日：2012-10-11

Applicant: QUALCOMM INCORPORATED

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

IPC: H04N7/26 ,  H04N7/50

CPC classification number: H03M7/4075 ,  H03M7/3068 ,  H03M7/3075 ,  H04N19/105 ,  H04N19/136 ,  H04N19/18 ,  H04N19/91

Abstract: This disclosure describes techniques for coding non-symmetric distributions of data and techniques for quantization matrix compression. The techniques for coding non-symmetric distributions of data may use a mapping that is configured to bias either positive data values or negative data values of a signed integer source towards shorter codewords of a variable length code that codes non-negative integers. This may allow signed integer data sources that have non-symmetric distributions of data to be coded in a more efficient manner. The quantization matrix compression techniques of this disclosure may use a predictor that is configured to generate prediction residuals for a quantization matrix that are skewed in favor of positive values. This may allow entropy coding techniques that favor data distributions which are skewed toward positive data values (e.g., the techniques for coding non-symmetric distributions described above) to be used to increase the coding efficiency of the quantization matrix.

Abstract translation: 本公开描述了用于编码用于量化矩阵压缩的数据和技术的非对称分布的技术。 用于编码数据的非对称分布的技术可以使用被配置为将有符号整数源的正数据值或负数据值偏置到编码非负整数的可变长度码的较短码字的映射。 这可以允许以更有效的方式编码数据的非对称分布的有符号整数数据源。 本公开的量化矩阵压缩技术可以使用预测器，其被配置为生成倾斜于有利于正值的量化矩阵的预测残差。 这可以允许有利于向正数据值偏斜的数据分布的熵编码技术（例如，用于编码上述非对称分布的技术）用于增加量化矩阵的编码效率。

公开(公告)号：US20240129531A1

公开(公告)日：2024-04-18

申请号：US18496152

申请日：2023-10-27

Applicant: QUALCOMM Incorporated

Inventor： Peisong Chen ,  Yunfei Zheng ,  Rajan Laxman Joshi ,  Muhammed Zeyd Coban ,  Marta Karczewicz

IPC: H04N19/60 ,  H04N19/122 ,  H04N19/129 ,  H04N19/147 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46

CPC classification number: H04N19/60 ,  H04N19/122 ,  H04N19/129 ,  H04N19/147 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46

Abstract: A video encoder may transform residual data by using a transform selected from a group of transforms. The transform is applied to the residual data to create a two-dimensional array of transform coefficients. A scanning mode is selected to scan the transform coefficients in the two-dimensional array into a one-dimensional array of transform coefficients. The combination of transform and scanning mode may be selected from a subset of combinations that is based on an intra-prediction mode. The scanning mode may also be selected based on the transform used to create the two-dimensional array. The transforms and/or scanning modes used may be signaled to a video decoder.

公开(公告)号：US11323733B2

公开(公告)日：2022-05-03

申请号：US14719260

申请日：2015-05-21

Applicant: QUALCOMM Incorporated

Inventor： Vadim Seregin ,  Rajan Laxman Joshi ,  Marta Karczewicz ,  Wei Pu ,  Joel Sole Rojals

IPC: H04N19/105 ,  H04N19/186 ,  H04N19/176 ,  H04N19/50 ,  H04N19/119 ,  H04N19/96 ,  H04N19/157

Abstract: 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.