公开(公告)号：US20210084343A1

公开(公告)日：2021-03-18

申请号：US17024422

申请日：2020-09-17

Applicant: QUALCOMM Incorporated

Inventor： Adarsh Krishnan Ramasubramonian ,  Geert Van der Auwera ,  Vadim Seregin ,  Marta Karczewicz

IPC: H04N19/96 ,  H04N19/186

Abstract: An example device includes a memory and one or more processors. The one or more processors are configured to determine whether a first coding tree unit (CTU) is coded using single tree and based on the first CTU being coded using single tree, determine a first transform unit (TU) based on a first transform block (TB) of luma samples and a first two corresponding TBs of chroma samples. The one or more processors are also configured to determine whether a second CTU is coded using dual tree and based on the second CTU being coded using dual tree, determine a second TU based on either (i) a second TB of luma samples or (ii) a second two TBs of chroma samples. The first TU includes syntax structures used to transform first TB samples and the second TU includes syntax structures used to transform second TB samples.

公开(公告)号：US20210084324A1

公开(公告)日：2021-03-18

申请号：US17022700

申请日：2020-09-16

Applicant: QUALCOMM Incorporated

Inventor： Bappaditya Ray ,  Han Huang ,  Geert Van der Auwera ,  Marta Karczewicz

IPC: H04N19/51 ,  H04N19/176 ,  H04N19/117

Abstract: An example device for decoding video data includes memory configured to store the video data and one or more processors implemented in circuitry and communicatively coupled to the memory. The one or more processors are configured to determine whether a coding mode for a current block of the video data is an affine mode. The one or more processors are also configured to determine whether pattern refined optical flow (PROF) is enabled in the sequence parameter set (SPS) for the current block. Based at least in part on the coding mode for the current block being the affine mode and PROF being enabled in the SPS for the current block, the one or more processors are configured to disable a deblocking filter for subblock boundaries of the current block and decode the current block with the deblocking filter disabled for the subblock boundaries of the current block.

公开(公告)号：US10951913B2

公开(公告)日：2021-03-16

申请号：US16677417

申请日：2019-11-07

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/56 ,  H04N19/176 ,  H04N19/52 ,  H04N19/51 ,  H04N19/122

Abstract: A method of decoding and encoding video data includes constructing a motion vector candidate list for the current block of video data based on the motion information from the neighboring blocks relative to the current block determined to include motion information, and adaptively ordering the constructed motion vector candidate list for the current block of video data based on at least one weight among a plurality of weights associated with motion information included in each neighboring block determined to include motion information.

公开(公告)号：US20210076032A1

公开(公告)日：2021-03-11

申请号：US16929868

申请日：2020-07-15

Applicant: QUALCOMM Incorporated

Inventor： Nan Hu ,  Jie Dong ,  Vadim Seregin ,  Marta Karczewicz

IPC: H04N19/117 ,  H04N19/132 ,  H04N19/159 ,  H04N19/186 ,  H04N19/172

Abstract: As part of a process to encode or decode video data, a video coding device determines a value by applying an adaptive loop filter (ALF) to luma samples corresponding to a chroma sample of a current picture, the luma samples corresponding to the chroma sample being within a filter pattern that is the same for all chroma formats and types of chroma samples. A center coefficient of the filter pattern is applied to a collocated luma sample of the chroma sample. The video coding device adds the value to the chroma sample to determine a modified chroma value.

公开(公告)号：US20210058642A1

公开(公告)日：2021-02-25

申请号：US16993785

申请日：2020-08-14

Applicant: QUALCOMM Incorporated

Inventor： Hilmi Enes Egilmez ,  Vadim Seregin ,  Marta Karczewicz

IPC: H04N19/61 ,  H04N19/18 ,  H04N19/176 ,  H04N19/593

Abstract: A method of decoding video data includes receiving encoded data for a current block and decoding N bins for a low-frequency non-separable transform (LFNST) index from the encoded data. The N bins comprises a first bin and a second bin. Decoding the N bins comprises context decoding each bin of the N bins. The method further includes determining the LFNST index using the N bins and decoding the encoded data to generate transform coefficients. The method further includes applying an inverse LFNST to the transform coefficients using the LFNST index to produce a residual block for the current block and reconstructing the current block of the video data using the residual block and a prediction block for the current block.

公开(公告)号：US20210058620A1

公开(公告)日：2021-02-25

申请号：US16997321

申请日：2020-08-19

Applicant: QUALCOMM Incorporated

Inventor： Adarsh Krishnan Ramasubramonian ,  Geert Van der Auwera ,  Wei-Jung Chien ,  Han Huang ,  Yu Han ,  Bappaditya Ray ,  Marta Karczewicz

IPC: H04N19/124 ,  H04N19/44 ,  H04N19/186 ,  H04N19/176

Abstract: Techniques are described for decoding video data. A video decoder may determine chroma blocks in a chroma quantization group (QG) of the video data, determine a quantization parameter predictor that is the same for each of the chroma blocks of the chroma QG, determine an offset value that is the same for two or more of the chroma blocks of the chroma QG, determine a quantization parameter value for each of the two or more of the chroma blocks in the chroma QG based on the quantization parameter predictor and the offset value inverse quantize coefficients of one or more residual blocks for the chroma blocks based on the determined quantization parameter value, generate the one or more residual blocks based on the inverse quantized coefficients, and reconstruct the chroma blocks based on the one or more residual blocks.

公开(公告)号：US20210044812A1

公开(公告)日：2021-02-11

申请号：US16947463

申请日：2020-08-03

Applicant: QUALCOMM Incorporated

Inventor： Yung-Hsuan Chao ,  Chao-Hsiung Hung ,  Wei-Jung Chien ,  Marta Karczewicz

IPC: H04N19/186 ,  H04N19/593 ,  H04N19/70 ,  H04N19/13 ,  H04N19/91 ,  H04N19/176

Abstract: An example device for decoding video data includes a memory for storing the video data and one or more processors implemented in circuitry and communicatively coupled to the memory. The one or more processors are configured to determine whether a first coding unit (CU) is a skip mode CU, and based on the first CU not being a skip mode CU, determine whether the first CU is encoded using one of an intra mode or a palette mode. The one or more processors are also configured to determine whether the first CU is encoded using the palette mode based on the first CU being encoded using one of the intra mode or the palette mode. The one or more processors are also configured to decode the first CU based on the determination of whether the first CU is encoded using the palette mode.

公开(公告)号：US10915986B2

公开(公告)日：2021-02-09

申请号：US15925674

申请日：2018-03-19

Applicant: QUALCOMM Incorporated

Inventor： Muhammed Coban ,  Geert Van Der Auwera ,  Marta Karczewicz

IPC: G06K9/46 ,  G06T3/00 ,  H04N19/172 ,  H04N19/174 ,  G06F17/17 ,  H04N19/597 ,  H04N19/85 ,  G06T17/00 ,  G06T15/20

Abstract: Methods and systems for processing video data are provided. In one example, a first video bitstream can be obtained, which can include video frames of a spherical representation of 360-degree video data. Two-dimensional pixel coordinates of a pixel location of a planar surface of a geometry can be determined. The planar surface can be part of a plurality of planar surfaces of the geometry. Two-dimensional normalized coordinates can be determined for the pixel location based on an adaptation parameter and the two-dimensional pixel coordinates. Three-dimensional coordinates of a sample point of the spherical representation of the 360-degree video data can be determined based on the two-dimensional normalized coordinates. A pixel value for the pixel location of the planar surface of the geometry can be determined based on the sample point, and a second video bitstream can be generated that includes pixel values determined for pixel locations of the plurality of planar surfaces of the geometry.

公开(公告)号：US10904548B2

公开(公告)日：2021-01-26

申请号：US16704995

申请日：2019-12-05

Applicant: QUALCOMM Incorporated

Inventor： Marta Karczewicz ,  Muhammed Zeyd Coban

IPC: H04N19/44 ,  H04N19/70 ,  G06F17/18 ,  H04N19/13 ,  H04N19/176 ,  H04N19/46

Abstract: A video coder may be configured to determine a value for a zero parameter based on the Rice parameter, wherein the value for the zero parameter identifies a coded value that corresponds to a coefficient level of zero; receive a first coded value for a first coefficient of the second set of coefficients; and based on the value for the zero parameter and the first coded value for the first coefficient, determine a level for the first coefficient.

公开(公告)号：US10904529B2

公开(公告)日：2021-01-26

申请号：US16250845

申请日：2019-01-17

Applicant: QUALCOMM Incorporated

Inventor： Yung-Hsuan Chao ,  Yi-Wen Chen ,  Wei-Jung Chien ,  Marta Karczewicz

IPC: H04N19/124 ,  H04N19/196 ,  H04N19/157 ,  H04N19/119 ,  H04N19/174 ,  H04N19/176 ,  H04N19/96

Abstract: A method of coding video data comprising determining a quantization group (QG) based on one or more of a size of a CU splitting node and a value of a region-based parameter, determining a single quantization parameter for all blocks of video data within the determined quantization group, and performing a quantization process on transform coefficients of all blocks of video data within the determined quantization group using the determined single quantization parameter.