公开(公告)号：US09866829B2

公开(公告)日：2018-01-09

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: H04N19/134 ,  H04N19/50 ,  H03M7/40 ,  H04N19/176 ,  H04N19/70 ,  H04N19/13 ,  H04N19/129 ,  H04N19/102 ,  H04N19/103 ,  H04N19/18 ,  H04N19/42

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.

公开(公告)号：US09843816B2

公开(公告)日：2017-12-12

申请号：US14691376

申请日：2015-04-20

Applicant: QUALCOMM Incorporated

Inventor： Natan Haim Jacobson ,  Vijayaraghavan Thirumalai ,  Rajan Laxman Joshi ,  Min Dai

IPC: H04N19/10 ,  H04N19/196 ,  H04N19/167 ,  H04N19/593 ,  H04N19/94

CPC classification number: H04N19/196 ,  H04N19/167 ,  H04N19/593 ,  H04N19/94

Abstract: A system and method for coding video data in pattern mode for display stream compression (DSC) is disclosed. In one aspect, the method includes determining that a first pattern in a current block of video data is not in a pattern database comprising a plurality of patterns, and adding the first pattern to the pattern database. The first pattern may be associated with a first index identifying a location of the first pattern in the pattern database. The method further includes coding the current block in pattern mode at least in part via signaling (i) the first pattern determined not to be in the pattern database and (ii) the first index identifying the location of the first pattern in the first database.

公开(公告)号：US09826242B2

公开(公告)日：2017-11-21

申请号：US14656087

申请日：2015-03-12

Applicant: QUALCOMM Incorporated

Inventor： Wei Pu ,  Feng Zou ,  Rajan Laxman Joshi ,  Joel Sole Rojals ,  Marta Karczewicz

IPC: H04N7/12 ,  H04N11/02 ,  H04N11/04 ,  H04N19/186 ,  H04N19/70 ,  H04N19/176 ,  H04N19/90 ,  H04N19/93

CPC classification number: H04N19/186 ,  H04N19/176 ,  H04N19/70 ,  H04N19/90 ,  H04N19/93

Abstract: In an example, a method of coding video data includes determining, by a video coder and for a block of video data, a palette having a plurality of entries indicating a plurality of respective color values, wherein a first line of the block of video data includes a pixel located adjacent to an edge of the block of video data, and wherein a second line of the block of video data includes a pixel located adjacent to the edge of the block and adjacent to the pixel of the first line. In this example, the method also includes coding, in a scan order, index values that map pixels of the block to entries in the palette, wherein the pixel of the second line immediately follows the pixel of the first line in the scan order.

公开(公告)号：US20170302951A1

公开(公告)日：2017-10-19

申请号：US15484879

申请日：2017-04-11

Applicant: QUALCOMM Incorporated

Inventor： Rajan Laxman Joshi ,  Vadim Seregin ,  Ye-Kui Wang ,  Krishnakanth Rapaka ,  Marta Karczewicz

IPC: H04N19/513 ,  H04N19/46 ,  H04N19/105 ,  H04N19/159 ,  H04N19/70 ,  H04N19/174 ,  H04N19/172 ,  H04N19/184

Abstract: A method of encoding video data comprising encoding a current picture of video data, generating a respective collocated reference picture index syntax element for one or more slices of the current picture, and performing a bitstream conformance check only for slices of the one or more slices that do not have an intra slice type and for which a temporal motion vector predictor is enabled, the bitstream conformance check constraining the values of the respective collocated reference picture index syntax elements such that each respective collocated reference picture index syntax element points to the same picture and does not reference the current picture itself.

公开(公告)号：US09706200B2

公开(公告)日：2017-07-11

申请号：US13919936

申请日：2013-06-17

Applicant: QUALCOMM Incorporated

Inventor： Rajan Laxman Joshi ,  Geert Van der Auwera ,  Marta Karczewicz

IPC: H04N7/12 ,  H04N19/85 ,  H04N19/176 ,  H04N19/70 ,  H04N19/127 ,  H04N19/162 ,  H04N19/82

CPC classification number: H04N19/85 ,  H04N19/127 ,  H04N19/162 ,  H04N19/176 ,  H04N19/70 ,  H04N19/82

Abstract: Techniques described herein are related to harmonizing the signaling of coding modes and filtering in video coding. In one example, a method of decoding video data is provided that includes decoding a first syntax element to determine whether PCM coding mode is used for one or more video blocks, wherein the PCM coding mode refers to a mode that codes pixel values as PCM samples. The method further includes decoding a second syntax element to determine whether in-loop filtering is applied to the one or more video blocks. Responsive to the first syntax element indicating that the PCM coding mode is used, the method further includes applying in-loop filtering to the one or more video blocks based at least in part on the second syntax element and decoding the one or more video blocks based at least in part on the first and second syntax elements.

公开(公告)号：US09667994B2

公开(公告)日：2017-05-30

申请号：US14038536

申请日：2013-09-26

Applicant: QUALCOMM Incorporated

Inventor： Rajan Laxman Joshi ,  Liwei Guo ,  Marta Karczewicz

IPC: H04N19/70 ,  H04N19/593 ,  H04N19/176 ,  H04N19/96 ,  H04N19/11 ,  H04N19/186 ,  H04N19/645 ,  H04N19/105

CPC classification number: H04N19/593 ,  H04N19/11 ,  H04N19/176 ,  H04N19/186 ,  H04N19/645 ,  H04N19/70 ,  H04N19/96

Abstract: Systems, methods, and devices for video coding that may receive a rectangular chroma block are disclosed. The rectangular chroma block may be divided into a first square sub-block and a second square sub-block. The systems, methods, and devices may reconstruct the first square sub-block and intra-predict the second square sub-block using reference samples from the reconstructed first square sub-block.

公开(公告)号：US09648330B2

公开(公告)日：2017-05-09

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 ,  H04N19/147 ,  H04N19/105 ,  H04N19/61 ,  H04N19/176

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.

公开(公告)号：US20170026663A1

公开(公告)日：2017-01-26

申请号：US15213966

申请日：2016-07-19

Applicant: QUALCOMM Incorporated

Inventor： Vijayaraghavan Thirumalai ,  Natan Haim Jacobson ,  Rajan Laxman Joshi

IPC: H04N19/60 ,  H04N19/154 ,  H04N19/167 ,  H04N19/176

CPC classification number: H04N19/60 ,  H04N19/122 ,  H04N19/14 ,  H04N19/147 ,  H04N19/154 ,  H04N19/167 ,  H04N19/176

Abstract: Methods and apparatuses for modification to block size for transform mode in display stream compression are disclosed. In one aspect, the method involves selecting a current block and a next block of video data, calculating a first rate-distortion (RD) cost for coding the current and next blocks with a larger block size transform (LBT) mode, and calculating a second RD cost for coding each of the current and next blocks with another coding mode different from the LBT mode. The method may further involve determining whether the first RD cost is less than a sum of the second RD costs for the current and next blocks and coding the current and next blocks with the LBT mode in response to the first RD cost being less than the sum of the second RD costs for the current and next blocks.

Abstract translation: 公开了用于在显示流压缩中对变形模式的块大小进行修改的方法和装置。 一方面，该方法涉及选择视频数据的当前块和下一块，计算用于以较大的块大小变换（LBT）模式对当前块和下一个块进行编码的第一速率失真（RD）成本，并计算 用于使用与LBT模式不同的另一编码模式对每个当前块和下一个块进行编码的第二RD成本。 该方法还可以包括确定第一RD成本是否小于当前块和下一个块的第二RD成本之和，并且响应于第一RD成本小于总和，对具有LBT模式的当前块和下一个块进行编码 的当前和下一个块的第二个RD成本。

公开(公告)号：US09549182B2

公开(公告)日：2017-01-17

申请号：US14259046

申请日：2014-04-22

Applicant: QUALCOMM Incorporated

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

IPC: H04N11/02 ,  H04N19/593 ,  H04N19/159 ,  H04N19/176 ,  H04N19/129 ,  H04N19/14 ,  H04N19/88 ,  H04N19/46

CPC classification number: H04N19/159 ,  H04N19/129 ,  H04N19/14 ,  H04N19/176 ,  H04N19/46 ,  H04N19/593 ,  H04N19/88

Abstract: Techniques are described for coding residual data of a prediction residual block in either a lossy or lossless coding mode, in which a transform is skipped or bypassed. The techniques of this disclosure include determining whether to reposition, e.g., rotate or flip, residual data of a residual block prior to coding the residual data of the residual block. For both the lossy and lossless coding modes, a video coding device determines whether to reposition residual data of a residual block based on a prediction mode of the residual block and a size of the residual block. In some examples, the techniques disable repositioning for all residual blocks in the inter-prediction mode and the intra block copying prediction mode, and determine to reposition residual blocks in the intra-prediction mode when the residual blocks have block sizes that are less than or equal to a threshold size.

Abstract translation: 描述了用于在有损或无损编码模式中编码预测残差块的残差数据的技术，其中跳变或旁路转换。 本公开的技术包括在对残余块的残差数据进行编码之前确定是否重新定位（例如）旋转或翻转残余块的残差数据。 对于有损和无损编码模式，视频编码装置基于残差块的预测模式和残余块的大小来确定是否重新定位残余块的残差数据。 在一些示例中，这些技术禁止在帧间预测模式和帧内块复制预测模式中的所有残余块的重新定位，并且当残差块具有小于或等于或小于块的块大小时，确定在帧内预测模式中重新定位残余块 等于阈值大小。

公开(公告)号：US20160373745A1

公开(公告)日：2016-12-22

申请号：US15177201

申请日：2016-06-08

Applicant: QUALCOMM Incorporated

Inventor： Rajan Laxman Joshi ,  Vadim Seregin ,  Wei Pu ,  Feng Zou ,  Marta Karczewicz

IPC: H04N19/119 ,  H04N19/13 ,  H04N19/159 ,  H04N19/184

CPC classification number: H04N19/119 ,  H04N19/13 ,  H04N19/159 ,  H04N19/176 ,  H04N19/184 ,  H04N19/186 ,  H04N19/70 ,  H04N19/91

Abstract: An example method of coding video data includes coding, from a coded video bitstream, a syntax element that indicates whether a transpose process is applied to palette indices of a palette for a current block of video data; decoding, from the coded video bitstream and at a position in the coded video bitstream that is after the syntax element that indicates whether the transpose process is applied to palette indices of the palette for the current block of video data, one or more syntax elements related to delta quantization parameter (QP) and/or chroma QP offsets for the current block of video data; and decoding the current block of video data based on the palette for the current block of video data and the one or more syntax elements related to delta QP and/or chroma QP offsets for the current block of video data.

Abstract translation: 编码视频数据的示例性方法包括从编码视频比特流中编码一个语法元素，该语法元素指示转置处理是否应用于当前视频数据块的调色板的调色板索引; 从经编码的视频比特流和编码视频比特流中的位于语法元素之后的位置，该语法元素指示转置处理是否被应用于当前视频数据块的调色板的调色板索引，一个或多个语法元素相关 到当前视频数据块的Δ量化参数（QP）和/或色度QP偏移量; 以及基于用于当前视频数据块的调色板和与当前视频数据块的delta QP和/或chroma QP偏移相关的一个或多个语法元素来解码当前视频数据块。