公开(公告)号：US10200709B2

公开(公告)日：2019-02-05

申请号：US13801731

申请日：2013-03-13

Applicant: QUALCOMM Incorporated

Inventor： Ying Chen ,  Ye-Kui Wang ,  Li Zhang

IPC: H04N19/58 ,  H04N19/51 ,  H04N19/597 ,  H04N19/52 ,  H04N19/70

Abstract: In one example, a device includes a video coder configured to code a picture order count (POC) value for a first picture of video data, code a second-dimension picture identifier for the first picture, and code, in accordance with a base video coding specification or an extension to the base video coding specification, a second picture based at least in part on the POC value and the second-dimension picture identifier of the first picture. The video coder may comprise a video encoder or a video decoder. The second-dimension picture identifier may comprise, for example, a view identifier, a view order index, a layer identifier, or other such identifier. The video coder may code the POC value and the second-dimension picture identifier during coding of a motion vector for a block of the second picture, e.g., during advanced motion vector prediction or merge mode coding.

公开(公告)号：US20190014349A1

公开(公告)日：2019-01-10

申请号：US16027173

申请日：2018-07-03

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/61 ,  H04N19/176 ,  H04N19/117 ,  H04N19/107 ,  H04N19/172

Abstract: A video decoder can be configured to perform a filtering operation by determining a first difference value that corresponds to a difference between the sample value of the selected sample and a sample value of a first neighboring sample; multiplying the first difference value by a first weighting parameter to determine a first weighted difference value; determining a second difference value that corresponds to a difference between the sample value of the selected sample and a sample value of a second neighboring sample; multiplying the second difference value by a second weighting parameter to determine a second weighted difference value; and adding the first weighted difference value and the second weighted difference value to the sample value of the selected sample to determine the modified sample value.

公开(公告)号：US20190014315A1

公开(公告)日：2019-01-10

申请号：US16025772

申请日：2018-07-02

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/117 ,  H04N19/82 ,  H04N19/124 ,  H04N19/176 ,  H04N19/159

CPC classification number: H04N19/117 ,  H04N19/124 ,  H04N19/14 ,  H04N19/159 ,  H04N19/176 ,  H04N19/463 ,  H04N19/82 ,  H04N19/86

Abstract: An apparatus configured to decode video data, including a memory configured to store a block of a current picture of the video data, and one or more processors in communication with the memory. The one or more processors may be configured to reconstruct the block of the current picture of the video data, determine a classification, from among a plurality of classifications, of the block according to a rule, wherein the rule is adaptively determined based on characteristics of coded sequences of the video data, and apply an adaptive loop filter (ALF) to the block based on the classification of the block.

公开(公告)号：US10136143B2

公开(公告)日：2018-11-20

申请号：US14098357

申请日：2013-12-05

Applicant: QUALCOMM Incorporated

Inventor： Li Zhang ,  Ying Chen ,  Marta Karczewicz

IPC: H04N19/159 ,  H04N19/105 ,  H04N19/597 ,  H04N19/31 ,  H04N19/176 ,  H04N19/70 ,  H04N19/30 ,  H04N19/61 ,  H04N19/103 ,  H04N19/107 ,  H04N19/136 ,  H04N19/187 ,  H04N19/577

Abstract: In an example, a method of coding video data includes determining a partition mode for coding a block of video data, where the partition mode indicates a division of the block of video data for predictive coding. The method also includes determining whether to code a weighting factor for an inter-view residual prediction process based on the partition mode, where, when the weighting factor is not coded, the inter-view residual prediction process is not applied to predict a residual for the block. The method also includes coding the block of video data with the determined partition mode.

公开(公告)号：US20180288441A1

公开(公告)日：2018-10-04

申请号：US15937687

申请日：2018-03-27

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/80 ,  H04N19/176 ,  H04N19/186 ,  H04N19/44 ,  H04N19/107 ,  H04N19/159

CPC classification number: H04N19/80 ,  H04N19/107 ,  H04N19/117 ,  H04N19/14 ,  H04N19/159 ,  H04N19/167 ,  H04N19/176 ,  H04N19/186 ,  H04N19/44 ,  H04N19/82

Abstract: A video decoder can be configured to determine first filter information for a first luma block unit of a current block; filter the first luma block unit based on the first filter information; determine second filter information for a second luma block unit of the current block; filter the second luma block unit based on the second filter information; and derive third filter information for a chroma block unit of the current block based on filter information determined for multiple luma block units, wherein the filter information determined for the multiple luma block units includes the first filter information for the first luma block unit and the second filter information for the second luma block unit; filter the chroma block unit based on the third filter information; and output a decoded version of the current block.

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.