公开(公告)号：US20180288419A1

公开(公告)日：2018-10-04

申请号：US15940349

申请日：2018-03-29

Applicant: QUALCOMM Incorporated

Inventor： Yang Yu ,  In Suk Chong ,  Xianglin Wang ,  Marta Karczewicz

IPC: H04N19/147 ,  H04N19/124 ,  H04N19/176 ,  H04N19/64

CPC classification number: H04N19/147 ,  H04N19/124 ,  H04N19/132 ,  H04N19/14 ,  H04N19/149 ,  H04N19/172 ,  H04N19/176 ,  H04N19/194 ,  H04N19/647

Abstract: A video coding device may be configured to estimate, based on a combination of a first parameter and a number of non-zero coefficients in a frame, a number of bits for non-zero coefficients of the frame, to encode the frame based on the estimated number of bits for the non-zero coefficients, to collect an actual number of bits used to encode the non-zero coefficients of the frame and an actual number of the non-zero coefficients in the frame, to update, based on the actual number of bits used to encode the non-zero coefficients of the frame and the actual number of non-zero coefficients in the frame, only the first parameter to form an updated first parameter, to form a rate estimation model using the updated first parameter and a second parameter, and to select, based on the rate estimation model, a coding mode for each block in the frame.

公开(公告)号：US20180278951A1

公开(公告)日：2018-09-27

申请号：US15933070

申请日：2018-03-22

Applicant: QUALCOMM Incorporated

Inventor： Vadim Seregin ,  Yu-Chen Sun ,  Yi-Wen Chen ,  Wei-Jung Chien ,  Xin Zhao ,  Rajan Laxman Joshi ,  Marta Karczewicz

IPC: H04N19/52 ,  H04N19/176 ,  H04N19/44 ,  H04N19/70

Abstract: Techniques are described to increase the coding efficiency of information indicating a sign of a motion vector difference (MVD) component. A video coder may determine a MVD component sign predictor, and determine whether the MVD component sign predictor is the MVD component sign based on an indicator that is transmitted or received. In some examples, the indicator may be context coded, which promotes coding efficiencies.

公开(公告)号：US20180278942A1

公开(公告)日：2018-09-27

申请号：US15926550

申请日：2018-03-20

Applicant: QUALCOMM Incorporated

Inventor： Kai Zhang ,  Jianle Chen ,  Xiang Li ,  Marta Karczewicz

IPC: H04N19/159 ,  H04N19/176 ,  H04N19/61

CPC classification number: H04N19/159 ,  H04N19/105 ,  H04N19/11 ,  H04N19/139 ,  H04N19/176 ,  H04N19/463 ,  H04N19/593 ,  H04N19/61

Abstract: A method of decoding video data, including receiving a first block of video data encoded using an inter-prediction mode associating a first intra-prediction mode with the first block of video data, wherein the first intra-prediction mode is associated with a second block of video data, and determining a second intra-prediction mode for a neighbor block of video data based at least in part on the first intra-prediction mode.

公开(公告)号：US10085027B2

公开(公告)日：2018-09-25

申请号：US14737252

申请日：2015-06-11

Applicant: QUALCOMM Incorporated

Inventor： Chengjie Tu ,  Wei-Jung Chien ,  Xianglin Wang ,  Jaehong Chon ,  In Suk Chong ,  Marta Karczewicz ,  Woo-Shik Kim ,  Xin Zhao

IPC: H04N11/02 ,  H04N19/14 ,  H04N19/147 ,  H04N19/176 ,  H04N19/119 ,  H04N19/109 ,  H04N19/157 ,  H04N19/567 ,  H04N19/174

CPC classification number: H04N19/14 ,  H04N19/109 ,  H04N19/119 ,  H04N19/147 ,  H04N19/157 ,  H04N19/174 ,  H04N19/176 ,  H04N19/567

Abstract: A video encoding device comprises a memory configured and at least one processor configured to: determine whether a metric meets a condition based on statistics, wherein the statistics are associated with a first video encoding mode checking order and a second video encoding mode checking order, responsive to determining that the metric meets the condition, select a first encoding mode checking order to encode the first block of video data responsive to determining that the condition is not met, select a second encoding mode checking order different from the first encoding mode checking order to encode the first block of video data, update the statistics based on the selected first or second encoding mode checking order, and encode a second block of video data, based on the updated statistics, and using the first or second mode checking order.

公开(公告)号：US10070130B2

公开(公告)日：2018-09-04

申请号：US15009657

申请日：2016-01-28

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/119 ,  H04N19/105 ,  H04N19/176 ,  H04N19/70 ,  H04N19/513 ,  H04N19/11 ,  H04N19/117 ,  H04N19/13 ,  H04N19/137 ,  H04N19/182 ,  H04N19/186 ,  H04N19/44 ,  H04N19/52 ,  H04N19/593 ,  H04N19/61

Abstract: In one example, a method of coding video data includes coding, from an encoded video bitstream, a syntax element that indicates a number of lines of video data that are in one or more of a plurality of sub-PUs of a current prediction unit (PU) of a current coding unit (CU) of video data. In this example, the method further includes determining, for each respective sub-PU of the plurality of sub-PUs, a respective vector that represents a displacement between the respective sub-PU and a respective predictor block from a plurality of previously decoded blocks of video data. In this example, the method further includes reconstructing each sub-PU of the plurality of sub-PUs based on the respective predictor blocks of video data.

公开(公告)号：US20180199062A1

公开(公告)日：2018-07-12

申请号：US15866287

申请日：2018-01-09

Applicant: QUALCOMM Incorporated

Inventor： Kai Zhang ,  Jianle Chen ,  Vadim Seregin ,  Hsiao-Chiang Chuang ,  Xiang Li ,  Li Zhang ,  Cheng-Teh Hsieh ,  Marta Karczewicz

IPC: H04N19/593 ,  H04N19/59 ,  H04N19/13 ,  H04N19/96

Abstract: A video decoder determines a current block of a current picture of video data has a size of P×Q, wherein P is a first value corresponding to a width of the current block and Q is a second value corresponding to a height of the current block, wherein P is not equal to Q, wherein the current block includes a short side and a long side, and wherein the first value added to the second value does not equal a value that is a power of 2; decodes the current block of video data using intra DC mode prediction, wherein decoding the current block of video data using intra DC mode prediction comprises performing a shift operation to calculate a DC value and generating a prediction block for the current block of video data using the calculated DC value; and outputs a decoded version of the current picture.

公开(公告)号：US20180192050A1

公开(公告)日：2018-07-05

申请号：US15861165

申请日：2018-01-03

Applicant: QUALCOMM Incorporated

Inventor： Li Zhang ,  Wei-Jung Chien ,  Marta Karczewicz ,  Ye-Kui Wang

IPC: H04N19/117 ,  H04N19/80

Abstract: A video coder may reconstruct a current picture of video data. A current region of the current picture is associated with a temporal index indicating a temporal layer to which the current region belongs. Furthermore, for each respective array of a plurality of arrays that correspond to different temporal layers, the video coder may store, in the respective array, sets of adaptive loop filtering (ALF) parameters used in applying ALF filters to samples of regions of pictures of the video data that are decoded prior to the current region and that are in the temporal layer corresponding to the respective array or a lower temporal layer than the temporal layer corresponding to the respective array. The video coder determines, based on a selected set of ALF parameters in the array corresponding to the temporal layer to which the current region belongs, an applicable set of ALF parameters.

公开(公告)号：US20180184126A1

公开(公告)日：2018-06-28

申请号：US15851219

申请日：2017-12-21

Applicant: QUALCOMM Incorporated

Inventor： Li Zhang ,  Wei-Jung Chien ,  Marta Karczewicz

IPC: H04N19/82 ,  H04N19/176 ,  H04N19/13

CPC classification number: H04N19/82 ,  H04N19/117 ,  H04N19/124 ,  H04N19/13 ,  H04N19/137 ,  H04N19/157 ,  H04N19/159 ,  H04N19/176 ,  H04N19/182 ,  H04N19/197 ,  H04N19/44 ,  H04N19/463 ,  H04N19/537 ,  H04N19/593 ,  H04N19/70 ,  H04N19/80 ,  H04N19/86 ,  H04N19/91

Abstract: A device for decoding video data determines mode information for a current block of a current picture of the video data; derives weights for use in a bilateral filter based on the mode information for the current block; applies the bilateral filter to a current sample of the current block by assign the weights to neighboring samples of the current sample of the current block and the current sample of the current block and modifying a sample value for the current sample based on sample values of the neighboring samples, the weights assigned to the neighboring samples, the sample value for the current sample, and the weight assigned to the current sample; and based on the modified sample value for the current sample, outputs a decoded version of the current picture.

公开(公告)号：US20180176582A1

公开(公告)日：2018-06-21

申请号：US15848862

申请日：2017-12-20

Applicant: QUALCOMM Incorporated

Inventor： Xin Zhao ,  Vadim Seregin ,  Li Zhang ,  Marta Karczewicz ,  Amir Said

IPC: H04N19/18 ,  H04N19/129 ,  H04N19/176 ,  H04N19/51 ,  H04N19/593 ,  H04N19/61 ,  H04N19/124 ,  H04N19/13

CPC classification number: H04N19/105 ,  H04N19/122 ,  H04N19/124 ,  H04N19/126 ,  H04N19/129 ,  H04N19/13 ,  H04N19/136 ,  H04N19/176 ,  H04N19/18 ,  H04N19/184 ,  H04N19/51 ,  H04N19/593 ,  H04N19/619

Abstract: Techniques for cost function measurement with respect to sign prediction-based video coding are generally described. An example device includes processing circuitry is configured to apply first and second sign combinations to transform coefficients of a stored block of video data to obtain first and second hypothesis reconstructions of the block, to measure first and second cost functions with respect to the first and second hypothesis reconstructions by determining respective sets of pixel value gradients representing differences between samples of each hypothesis reconstruction of the block and samples of a neighboring block positioned adjacent to the block. The processing circuitry is further configured to compare the respective cost functions, to select, based on the comparison, one of the hypothesis reconstructions of the block, and to code the block using the respective sign combination associated with the selected hypothesis reconstruction.

公开(公告)号：US09998742B2

公开(公告)日：2018-06-12

申请号：US15006994

申请日：2016-01-26

Applicant: QUALCOMM Incorporated

Inventor： Jianle Chen ,  Hongbin Liu ,  Ying Chen ,  Li Zhang ,  Xiang Li ,  Xin Zhao ,  Marta Karczewicz

IPC: H04N19/186 ,  H04N19/463 ,  H04N19/105 ,  H04N19/593

CPC classification number: H04N19/186 ,  H04N19/105 ,  H04N19/463 ,  H04N19/593

Abstract: A system and method for encoding and decoding video data. A predicted residual signal of a target color component is determined as a function of one or more linear parameters of a linear model and of a residual signal of a source color component. A residual signal of the target color component is determined as a function of a remaining residual signal of the target color component and of the predicted residual signal of the target color component.