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公开(公告)号:US20190387249A1
公开(公告)日:2019-12-19
申请号:US16443130
申请日:2019-06-17
Applicant: QUALCOMM Incorporated
Inventor: Han Huang , Wei-Jung Chien , Marta Karczewicz
IPC: H04N19/513 , H04N19/44
Abstract: A method of decoding video data includes receiving a plurality of blocks of video data, wherein each block of the plurality of blocks is encoded using a respective affine motion model of a plurality of affine motion models, and decoding the plurality of blocks of video data using the same affine motion field derivation process for each of the plurality of affine motion models.
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公开(公告)号:US10484721B2
公开(公告)日:2019-11-19
申请号:US14659122
申请日:2015-03-16
Applicant: QUALCOMM Incorporated
Inventor: Krishnakanth Rapaka , Joel Sole Rojals , Li Zhang , Marta Karczewicz
IPC: H04N19/96 , H04N19/56 , H04N19/557 , H04N19/52 , H04N19/53 , H04N19/57 , H04N19/196 , H04N19/567
Abstract: A method for motion estimation for screen and non-natural content coding is disclosed. In one aspect, the method may include selecting a candidate block of a first frame of the video data for matching with a current block of a second frame of the video data, calculating a first partial matching cost for matching a first subset of samples of the candidate block to the current block, and determining whether the candidate block has a lowest matching cost with the current block based at least in part on the first partial matching cost.
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183.
公开(公告)号:US20190320181A1
公开(公告)日:2019-10-17
申请号:US16385932
申请日:2019-04-16
Applicant: QUALCOMM Incorporated
Inventor: Yi-Wen Chen , Yung-Hsuan Chao , Wei-Jung Chien , Marta Karczewicz
IPC: H04N19/137 , H04N19/105 , H04N19/159 , H04N19/176
Abstract: Embodiments include techniques in video coding for deriving motion vectors or motion vector predictors for a current coding or prediction unit based on multiple spatial neighbors. For example, the motion vector or motion vector predictors may be derived as the weighted combination of motion vectors of multiple spatial neighbors. Alternatively, or additionally, motion vectors or motion vector predictors for an inter-prediction mode may be generated from respective MVs of two spatially neighboring blocks that are located asymmetrically to the current PU.
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公开(公告)号:US10448056B2
公开(公告)日:2019-10-15
申请号:US15646959
申请日:2017-07-11
Applicant: QUALCOMM Incorporated
Inventor: Xiang Li , Jianle Chen , Rajan Laxman Joshi , Vadim Seregin , Marta Karczewicz
IPC: H04N19/70 , H04N19/124 , H04N19/129 , H04N19/13 , H04N19/18 , H04N19/61 , H04N19/96 , H04N19/50 , H04N19/176 , H04N19/119 , H04N19/136
Abstract: A video decoder receives local quantization information for a current quantization group. The video decoder determines a partitioning of a coding tree unit (CTU) of a picture of the video data into a plurality of coding units (CUs). Additionally, the video decoder derives, based at least in part on the local quantization information for the current quantization group, a quantization parameter. The current quantization group is defined as a group of successive CUs so that boundaries of the current quantization group must be boundaries of the CUs. The current quantization group may or may not be square. Additionally, the video decoder inverse quantizes, based on the quantization parameter, at least one transform coefficient of a current CU being in the current quantization group. The video decoder reconstructs, based on inverse quantized transform coefficients of the current CU, a coding block of the current CU.
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公开(公告)号:US10448010B2
公开(公告)日:2019-10-15
申请号:US15725052
申请日:2017-10-04
Applicant: QUALCOMM Incorporated
Inventor: Yi-Wen Chen , Wei-Jung Chien , Li Zhang , Yu-Chen Sun , Jianle Chen , Marta Karczewicz
IPC: H04N19/105 , H04N19/176 , H04N19/139 , H04N19/52 , H04N19/537
Abstract: A video decoder selects a source affine block. The source affine block is an affine-coded block that spatially neighbors a current block. Additionally, the video decoder extrapolates motion vectors of control points of the source affine block to determine motion vector predictors for control points of the current block. The video decoder inserts, into an affine motion vector predictor (MVP) set candidate list, an affine MVP set that includes the motion vector predictors for the control points of the current block. The video decoder also determines, based on an index signaled in a bitstream, a selected affine MVP set in the affine MVP set candidate list. The video decoder obtains, from the bitstream, motion vector differences (MVDs) that indicate differences between motion vectors of the control points of the current block and motion vector predictors in the selected affine MVP set.
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公开(公告)号:US10447990B2
公开(公告)日:2019-10-15
申请号:US13779468
申请日:2013-02-27
Applicant: QUALCOMM Incorporated
Inventor: Ying Chen , Ye-Kui Wang , Marta Karczewicz
IPC: H04N13/161 , H04N19/597 , H04N19/70 , H04N19/12 , H04N19/169
Abstract: A video encoder generates a network abstraction layer (NAL) unit that includes at least a first syntax element and a second syntax element. The first syntax element indicates that the NAL unit belongs to a particular NAL unit type. Coded slices of texture view components and depth view components are encapsulated within NAL units that belong to the particular NAL unit type. The second syntax element indicates whether a NAL unit header of the NAL unit includes an Advanced Video Coding (AVC)-compatible 3-dimensional video (3DV) header extension or includes a Multiview Video Coding (MVC)-compatible 3DV header extension. The video encoder outputs a bitstream that includes the NAL unit. A video decoder receives the NAL unit and determines whether the second syntax element indicates that the NAL unit header of the NAL unit includes the AVC-compatible 3DV header extension or the MVC-compatible 3DV header extension.
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公开(公告)号:US20190313108A1
公开(公告)日:2019-10-10
申请号:US16375665
申请日:2019-04-04
Applicant: QUALCOMM Incorporated
Inventor: Li Zhang , Kai Zhang , Wei-Jung Chien , Marta Karczewicz
IPC: H04N19/18 , H04N19/96 , H04N19/176 , H04N19/122 , H04N19/129 , H04N19/159
Abstract: Techniques are described for decoding and encoding video data utilizing non-square coefficient groups (CGs). A coefficient group includes a plurality of coefficient values for a block of coefficient values. In one or more examples, the CGs that form at least part of the block of coefficient values are non-square shaped.
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公开(公告)号:US20190306522A1
公开(公告)日:2019-10-03
申请号:US16368455
申请日:2019-03-28
Applicant: QUALCOMM Incorporated
Inventor: Amir Said , Hilmi Enes Egilmez , Marta Karczewicz , Vadim Seregin
IPC: H04N19/44 , H04N19/625 , H04N19/96 , H04N19/176 , G06F17/16
Abstract: A device may perform a first prediction process for a first block of video data to produce a first residual. The device may apply a first transform process to the first residual to generate first transform coefficients for the first block of video data and encode the first transform coefficients. The device may perform a second prediction process for a second block of video data to produce a second residual. The device may determine that a second transform process, which includes the first transform process and at least one of a pre-adjustment operation or a post-adjustment operation, is to be applied to the second residual. The device may apply the first transform process and the pre- or post-adjustment operation to the second residual to generate second transform coefficients for the second block. The coding device may code the first and second transform coefficients.
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189.
公开(公告)号:US10432942B2
公开(公告)日:2019-10-01
申请号:US15654574
申请日:2017-07-19
Applicant: QUALCOMM Incorporated
Inventor: Xiang Li , Jianle Chen , Marta Karczewicz
IPC: H04N19/136 , H04N19/124 , H04N19/30 , H04N19/186 , H04N19/42 , H04N19/105 , H04N19/70
Abstract: Techniques are described for signaling information used to generate three-dimensional (3D) color lookup tables for color gamut scalability in multi-layer video coding. A lower layer of video data may include color data in a first color gamut and a higher layer of the video data may include color data in a second color gamut. To generate inter-layer reference pictures, a video encoder and/or video decoder performs color prediction to convert the color data of a reference picture in the first color gamut to the second color gamut. The video coder may perform color prediction using a 3D lookup table. According to the techniques, a video encoder may encode partition information and/or color values of a 3D lookup table generated for color gamut scalability. A video decoder may decode the partition information and/or color values to generate the 3D lookup table in order to perform color gamut scalability.
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190.
公开(公告)号:US10425648B2
公开(公告)日:2019-09-24
申请号:US15272034
申请日:2016-09-21
Applicant: QUALCOMM Incorporated
Inventor: Amir Said , Xin Zhao , Jianle Chen , Marta Karczewicz
IPC: H04N19/159 , H04N19/105 , H04N19/117 , H04N19/147 , H04N19/157 , H04N19/176 , H04N19/182 , H04N19/70 , H04N19/593 , H04N19/11 , H04N19/146 , H04N19/172
Abstract: Techniques are described to improved video intra prediction using position-dependent prediction combination in video coding. In High Efficiency Video Encoding a set of 35 linear predictors are used for doing intra coding and prediction can be computed from either a nonfiltered or a filtered set of neighboring “reference” pixels, depending on the selected predictor mode and block size. Techniques of this disclosure may use a weighted combination of both the nonfiltered and filtered set of reference pixels to achieve better compression via improved prediction and therefore small residual, enable effective parallel computation of all sets of prediction values, and maintain low complexity via applying filtering only to a set of reference pixels and not to predicted values themselves.
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