公开(公告)号：US10158885B2

公开(公告)日：2018-12-18

申请号：US14906860

申请日：2013-12-24

Applicant: QUALCOMM Incorporated

Inventor： Li Zhang ,  Ying Chen ,  Vijayaraghavan Thirumalai ,  Hongbin Liu

IPC: H04N19/597 ,  H04N19/52 ,  H04N19/70 ,  H04N19/96

Abstract: A video coder determines a candidate for inclusion in a candidate list for a current prediction unit (PU). The candidate is based on motion parameters of a plurality of sub-PUs of the current PU. If a reference block corresponding to a sub-PU is not coded using motion compensated prediction, the video coder sets the motion parameters of the sub-PU to default motion parameters. For each respective sub-PU from the plurality of sub-PUs, if a reference block for the respective sub-PU is not coded using motion compensated prediction, the motion parameters of the respective sub-PU are not set in response to a subsequent determination that a reference block for any later sub-PU in an order is coded using motion compensated prediction.

公开(公告)号：US20170201753A1

公开(公告)日：2017-07-13

申请号：US15398567

申请日：2017-01-04

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/154 ,  H04N19/60 ,  H04N19/103 ,  H04N19/174 ,  H04N19/186

CPC classification number: H04N19/154 ,  H04N19/103 ,  H04N19/117 ,  H04N19/12 ,  H04N19/147 ,  H04N19/174 ,  H04N19/176 ,  H04N19/186 ,  H04N19/60 ,  H04N19/85

Abstract: Systems and methods are disclosed for calculating a distortion value of a frame or block, in a number of color spaces, and determining an optimal coding mode based on the calculated distortion values. One embodiment includes a system having a video source that includes a video camera or a video archive that contains previously stored video content, and a processor configured to encode the stored video content.

公开(公告)号：US09596448B2

公开(公告)日：2017-03-14

申请号：US14215876

申请日：2014-03-17

Applicant: QUALCOMM Incorporated

Inventor： Vijayaraghavan Thirumalai ,  Li Zhang ,  Ying Chen ,  Marta Karczewicz

IPC: H04N13/00 ,  H04N19/597

CPC classification number: H04N13/161 ,  H04N19/597

Abstract: A video coder can be configured to perform texture first coding for a first texture view, a first depth view, a second texture view, and a second depth view; for a macroblock of the second texture view, locate a depth block of the first depth view that corresponds to the macroblock; based on at least one depth value of the depth block, derive a disparity vector for the macroblock; code a first sub-block of the macroblock based on the derived disparity vector; and, code a second sub-block of the macroblock based on the derived disparity vector.

Abstract translation: 视频编码器可以被配置为对第一纹理视图，第一深度视图，第二纹理视图和第二深度视图执行纹理第一编码; 对于第二纹理视图的宏块，定位与宏块对应的第一深度视图的深度块; 基于所述深度块的至少一个深度值，导出所述宏块的视差向量; 基于导出的视差矢量对宏块的第一子块进行编码; 并且基于导出的视差矢量对该宏块的第二子块进行编码。

公开(公告)号：US20160044308A1

公开(公告)日：2016-02-11

申请号：US14819306

申请日：2015-08-05

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/105 ,  H04N19/112 ,  H04N19/182 ,  H04N19/159 ,  H04N19/174

CPC classification number: H04N19/105 ,  H04N19/112 ,  H04N19/159 ,  H04N19/174 ,  H04N19/182 ,  H04N19/593

Abstract: A method and apparatus for video coding with spatial prediction mode for multi-mode video coding is disclosed. In one aspect, the method includes coding a slice of video data, the slice including a plurality of pixels organized into a first line and a plurality of non-first lines. The coding of the slice further includes coding a current pixel of the first line in a spatial prediction mode using a previous pixel of the first line as a predictor and coding another pixel of a non-first line in a coding mode other than the spatial prediction mode.

Abstract translation: 公开了一种用于多模式视频编码的空间预测模式的视频编码方法和装置。 在一个方面，该方法包括对视频数据片进行编码，该片包括组织成第一行和多个非第一行的多个像素。 切片的编码还包括使用第一行的先前像素作为预测器在空间预测模式中编码第一行的当前像素，并且以空间预测以外的编码模式对非第一行的另一个像素进行编码 模式。

公开(公告)号：US11431968B2

公开(公告)日：2022-08-30

申请号：US16670759

申请日：2019-10-31

Applicant: QUALCOMM Incorporated

Inventor： Vadim Seregin ,  Nan Hu ,  Wei-Jung Chien ,  Marta Karczewicz ,  Xin Zhao ,  Vijayaraghavan Thirumalai

IPC: H04N19/00 ,  H04N19/11 ,  H04N19/157 ,  H04N19/463 ,  H04N19/159 ,  H04N19/176 ,  H04N19/593 ,  H04N19/10 ,  H04N19/103 ,  H04N19/105 ,  H04N19/112 ,  H04N19/122 ,  H04N19/129 ,  H04N19/149 ,  H04N19/167 ,  H04N19/169 ,  H04N19/182

Abstract: A video coder determines a first block of the video data is intra mode coded; based on a first height and the first width of the first block, identifies a group of N available intra prediction modes for the first block of video data; selects from the group of N available intra prediction modes, a first intra prediction mode used to code the first block of the video data; and codes the first block using the first intra prediction mode. A video coder generates a first most probable mode (MPM) candidate list for the block; codes a first flag indicating an actual intra prediction mode used to code the block is not included in the first MPM candidate list; generates a second MPM candidate list by deriving at least one candidate intra prediction mode based on an intra prediction mode in the first MPM candidate list.

公开(公告)号：US11082703B2

公开(公告)日：2021-08-03

申请号：US16715756

申请日：2019-12-16

Applicant: QUALCOMM Incorporated

Inventor： Vadim Seregin ,  Xin Zhao ,  Amir Said ,  Marta Karczewicz ,  Nan Hu ,  Wei-Jung Chien ,  Vijayaraghavan Thirumalai

IPC: H04N19/11 ,  H04N19/159 ,  H04N19/463 ,  H04N19/176 ,  H04N19/91 ,  H04N19/157 ,  H04N19/593 ,  H04N1/417 ,  H04N5/926 ,  H04N9/804 ,  H04N9/808

Abstract: A device for coding video data is configured to determine that a current block of video data is coded using an intra prediction mode; add an intra prediction mode of a first neighboring block of the current block to a most probable mode candidate list for the current block; add an intra prediction mode for a second neighboring block of the current block to the most probable mode candidate list for the current block; add an intra prediction mode for a third neighboring block of the current block to the most probable mode candidate list for the current block; and code the current block of video data using an intra prediction mode.

公开(公告)号：US10567803B2

公开(公告)日：2020-02-18

申请号：US15950504

申请日：2018-04-11

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/65 ,  H04N19/176 ,  H04N19/91 ,  H04N19/46 ,  H04N19/124 ,  H04N19/98 ,  H04N19/53 ,  H04N19/136 ,  H04N19/182 ,  H04N19/82

Abstract: A method of content compression including receiving a first block of samples including at least a first sample and a second sample, calculating a predictor value for the first block of samples, calculating a residual between the predictor value and the first sample, quantizing the residual to generate a quantized residual, de-quantizing the quantized residual to generate a de-quantized residual, reconstructing the first sample using the de-quantized residual and the predictor value to generate a first reconstructed sample, calculating an error value based on the first sample and the first reconstructed sample, and modifying the second sample by the error value.

公开(公告)号：US10432952B2

公开(公告)日：2019-10-01

申请号：US15353468

申请日：2016-11-16

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/152 ,  H04N19/30 ,  H04N19/176 ,  H04N19/149 ,  H04N19/115 ,  H04N19/124

Abstract: Provided are systems and methods for used fixed-point instead of floating point techniques in order to calculate various parameters for coding video data, including target rate, QP adjustment, buffer fullness, a Lagrangian parameters for a bitrate, and/or a Lagrangian parameter for the fullness of the buffer. By determining one or more of the parameters using fixed-point, hardware implementation costs may be decreased.

公开(公告)号：US10123045B2

公开(公告)日：2018-11-06

申请号：US15213966

申请日：2016-07-19

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/167 ,  H04N19/176 ,  H04N19/60 ,  H04N19/154 ,  H04N19/147 ,  H04N19/122 ,  H04N19/14

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.

公开(公告)号：US09930346B2

公开(公告)日：2018-03-27

申请号：US14685479

申请日：2015-04-13

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/00 ,  H04N19/176 ,  H04N19/124 ,  H04N19/115 ,  H04N19/14

CPC classification number: H04N19/176 ,  H04N19/115 ,  H04N19/124 ,  H04N19/14

Abstract: A system and method for flatness detection for display stream compression (DSC) is disclosed. In one aspect, the method includes determining a first complexity value for a previous block of video data, a second complexity value for a current block of the video data, and a third complexity value for a next block of the video data. The method also includes determining whether the current block includes a transition from a complex region to a flat region based at least in part on the first, second, and third complexity values.