公开(公告)号：US20150016533A1

公开(公告)日：2015-01-15

申请号：US14328498

申请日：2014-07-10

Applicant: QUALCOMM Incorporated

Inventor： Chao Pang ,  Joel Sole Rojals ,  Marta Karczewicz

IPC: H04N19/51 ,  H04N19/583

CPC classification number: H04N19/51 ,  H04N19/105 ,  H04N19/176 ,  H04N19/186 ,  H04N19/513 ,  H04N19/523 ,  H04N19/593

Abstract: A video coder comprising one or more processors determines that a current block of the video data is encoded using an intra motion compensation (IMC) mode, wherein the current block is in a frame of video; determines an offset vector for a first color component of the current block of the video data; locates, in the frame of video, a reference block of the first color component using the offset vector; modifies the offset vector to generate a modified offset vector in response to the offset vector pointing to a sub-pixel position for a second color component of the current block of video data; locates, in the frame of video, a reference block for the second color component using the modified offset vector; and codes the current block based on the reference block for the first color component and the reference block for the second color component.

Abstract translation: 包括一个或多个处理器的视频编码器确定使用帧内运动补偿（IMC）模式对视频数据的当前块进行编码，其中当前块在视频帧中; 确定视频数据的当前块的第一颜色分量的偏移矢量; 在视频帧中，使用偏移矢量位于第一颜色分量的参考块; 修改偏移矢量以响应于指向当前视频数据块的第二颜色分量的子像素位置的偏移矢量来生成修改的偏移矢量; 在视频帧中，使用修改的偏移向量来定位用于第二颜色分量的参考块; 并且基于第一颜色分量的参考块和第二颜色分量的参考块对当前块进行编码。

公开(公告)号：US20140376634A1

公开(公告)日：2014-12-25

申请号：US14309730

申请日：2014-06-19

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/583 ,  H04N19/82 ,  H04N19/51

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

Abstract: 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.

Abstract translation: 编码视频数据的技术，包括用于从同一图像内的视频数据的预测块对视频数据块进行帧内预测的模式，可以包括确定用于当前视频数据块的视频数据的预测块，其中视频预测块 数据是与当前视频数据块相同的图像内的视频数据的重建块。 可以由视频编码器使用以识别视频数据的预测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。 用于对来自同一图像内的视频数据的预测块的视频数据块进行帧内预测的模式可以被称为帧内复制或帧内补偿。

公开(公告)号：US20140226721A1

公开(公告)日：2014-08-14

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: H04N19/50 ,  H04N19/44 ,  H04N19/593

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，并且当剩余块具有小于或等于块的块大小时，确定以帧内预测模式重新定位残余块 等于阈值大小。

公开(公告)号：US10477232B2

公开(公告)日：2019-11-12

申请号：US14663161

申请日：2015-03-19

Applicant: QUALCOMM Incorporated

Inventor： Chao Pang ,  Joel Sole Rojals ,  Cheng-Teh Hsieh ,  Marta Karczewicz

IPC: H04N19/176 ,  H04N19/593 ,  H04N19/105 ,  H04N19/52 ,  H04N19/139 ,  H04N19/182 ,  H04N19/56 ,  H04N19/563 ,  H04N19/57

Abstract: A video coder may determine a search region for coding a current block of video data using Intra Block Copy (Intra BC). In some examples, the video coder determines a central point for the search region, and determines the search region for the current block based on the central point and a defined size for the search region. The video coder stores reconstructed blocks of the video data from a current picture that includes the current block in a memory based on the determined search region. The video coder codes information from which to identify one of the reconstructed blocks within the search region, and codes the current block based on the identified one of the reconstructed blocks according to Intra BC.

公开(公告)号：US10327002B2

公开(公告)日：2019-06-18

申请号：US14743253

申请日：2015-06-18

Applicant: QUALCOMM Incorporated

Inventor： Chao Pang ,  Krishnakanth Rapaka ,  Xiang Li ,  Joel Sole Rojals ,  Cheng-Teh Hsieh ,  Marta Karczewicz

IPC: H04N19/513 ,  H04N19/52 ,  H04N19/176 ,  H04N19/184 ,  H04N19/174 ,  H04N19/503 ,  H04N19/172 ,  H04N19/105 ,  H04N19/159 ,  H04N19/593 ,  H04N19/109

Abstract: Techniques and systems are provided for encoding and decoding video data. For example, a method of encoding video data including a plurality of pictures is described. The method includes performing intra-picture prediction on a block of one of the pictures to generate a prediction unit. Performing the intra-picture prediction includes selecting a reference block for intra-block copy prediction of a coding tree unit (CTU). The reference block is selected from a plurality of encoded blocks, and blocks within the CTU encoded with bi-prediction are excluded from selection as the reference block. Performing the intra-picture prediction further includes performing intra-block copy prediction with the selected reference block to generate the prediction unit. The method also includes generating syntax elements encoding the prediction unit based on the performed intra-picture prediction.

公开(公告)号：US10327001B2

公开(公告)日：2019-06-18

申请号：US14743176

申请日：2015-06-18

Applicant: QUALCOMM Incorporated

Inventor： Chao Pang ,  Krishnakanth Rapaka ,  Xiang Li ,  Joel Sole Rojals ,  Cheng-Teh Hsieh ,  Marta Karczewicz

IPC: H04N19/513 ,  H04N19/184 ,  H04N19/172 ,  H04N19/503 ,  H04N19/52 ,  H04N19/176 ,  H04N19/174 ,  H04N19/105 ,  H04N19/159 ,  H04N19/593 ,  H04N19/109

Abstract: Techniques and systems are provided for encoding and decoding video data. For example, a method of encoding video data includes obtaining video data at an encoder, and determining to perform intra-picture prediction on the video data, using intra-block copy prediction, to generate the plurality of encoded video pictures. The method also includes performing the intra-picture prediction on the video data using the intra-block copy prediction, and, in response to determining to perform the intra-picture prediction on the video data using the intra-block copy prediction, disabling at least one of inter-picture bi-prediction or inter-picture uni-prediction for the plurality of encoded video pictures. The method also includes generating the plurality of encoded video pictures based on the received video data according to the performed intra-block copy prediction.

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：US10218975B2

公开(公告)日：2019-02-26

申请号：US15278855

申请日：2016-09-28

Applicant: QUALCOMM Incorporated

Inventor： Wei-Jung Chien ,  Chao Pang ,  Li Zhang ,  Jianle Chen ,  Marta Karczewicz

IPC: H04N7/12 ,  H04N19/124 ,  H04N19/44 ,  H04N19/50 ,  H04N19/91 ,  H04N19/159 ,  H04N19/176 ,  H04N19/119 ,  H04N19/122 ,  H04N19/129 ,  H04N19/593 ,  H04N19/11 ,  H04N19/463 ,  H04N19/126 ,  H04N19/43

Abstract: An example device includes a memory device configured to store encoded video data, and processing circuitry coupled to the memory device. The processing circuitry is configured to determine that a rectangular transform unit (TU) of the stored video data includes a number of pixel rows denoted by a first integer value ‘K’ and a number of pixel columns denoted by a second integer value ‘L,’ where K has a value equal to an integer value ‘m’ left shifted by one, and where L has a value equal to an integer value ‘n’ left shifted by one, to determine that a sum of n and m is an odd number, and based on the sum of n and m being the odd number, to add a delta quantization parameter value to a quantization parameter (QP) value for the rectangular TU to obtain a modified QP value for the rectangular TU.

公开(公告)号：US10212445B2

公开(公告)日：2019-02-19

申请号：US14878825

申请日：2015-10-08

Applicant: QUALCOMM Incorporated

Inventor： Krishnakanth Rapaka ,  Chao Pang ,  Vadim Seregin ,  Marta Karczewicz

IPC: H04N19/50 ,  H04N19/44 ,  H04N19/593 ,  H04N19/11 ,  H04N19/157 ,  H04N19/174 ,  H04N19/436 ,  H04N19/55

Abstract: According to techniques of this disclosure, a video decoder can be configured to, for one or more blocks coded with wavefront parallel processing enabled, determine a coding tree block (CTB) delay, wherein the CTB delay identifies a delay between when a first row of CTBs starts being decoded and when a second row of CTBs below the first row of CTBs starts being decoded; for a current block of video data coded in an intra-block copy (IBC) mode and coded with wavefront parallel processing disabled, determine an IBC prediction region for the current block within a picture that includes the current block based on the CTB delay that was determined for the one or more blocks coded with wavefront parallel processing enabled; identify, from within the determined IBC prediction region for the current block, a predictive block for the current block; and IBC decode the current block based on the predictive block.

公开(公告)号：US09877035B2

公开(公告)日：2018-01-23

申请号：US14659358

申请日：2015-03-16

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/126 ,  H04N19/463 ,  H04N19/196 ,  H04N19/157

CPC classification number: H04N19/463 ,  H04N19/126 ,  H04N19/157 ,  H04N19/197

Abstract: In an example, system and method for coding encoded video data. A quantized residue differences block associated with a current block of a picture is generated and a reconstructed prediction residue for each quantized residue difference in the block of quantized residue differences is generated. Each reconstructed prediction residue is added to its corresponding original prediction value to produce a current block of a picture. Generating the reconstructed prediction residue includes performing inverse quantization on blocks of quantized residue differences, wherein the inverse quantization reconstructs data to which uniform quantization residue differential pulse code modulation (RDPCM) has been applied and wherein the quantization is of the form: ΔXq=floor((X+αQ)/Q) where Q is quantization step and α is quantization offset.