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.

公开(公告)号：US20200296423A1

公开(公告)日：2020-09-17

申请号：US16815605

申请日：2020-03-11

Applicant: QUALCOMM Incorporated

Inventor： Yung-Hsuan Chao ,  Marta Karczewicz

IPC: H04N19/70 ,  H04N19/50 ,  H04N19/184

Abstract: An example method includes dividing a current coding unit (CU) of video data into a plurality of index groups, the current CU of video data coded using a palette mode; parsing syntax elements for a first index group of the plurality of index groups; after parsing the syntax elements for the first index group, parsing syntax elements for a second index group of the plurality of index groups; and reconstructing the current CU of video data based on the syntax elements for the first index group and the syntax elements for the second index group.

公开(公告)号：US20200186799A1

公开(公告)日：2020-06-11

申请号：US16703495

申请日：2019-12-04

Applicant: QUALCOMM Incorporated

Inventor： Hongtao Wang ,  Yung-Hsuan Chao ,  Han Huang ,  Vadim Seregin ,  Wei-Jung Chien ,  Marta Karczewicz

IPC: H04N19/119 ,  H04N19/115 ,  H04N19/176 ,  H04N19/70 ,  H04N19/51

Abstract: This disclosure describes determining triangular prediction blocks for a current block partitioned in a triangle mode. A video coder may determine indices in a motion vector predictor list to identify motion vector predictors used to determine the triangular prediction block. If a first index value in the motion vector predictor list for a first triangular prediction block is less than a second index value in the motion vector predictor list for a second triangular prediction block, the signaled or received value for the second triangular prediction block may be the second index value reduced by an offset.

公开(公告)号：US20200021852A1

公开(公告)日：2020-01-16

申请号：US16511927

申请日：2019-07-15

Applicant: QUALCOMM Incorporated

Inventor： Yung-Hsuan Chao ,  Amir Said ,  Hilmi Enes Egilmez ,  Vadim Seregin ,  Marta Karczewicz

IPC: H04N19/625 ,  H04N19/20 ,  H04N19/61

Abstract: This disclosure describes examples of extending the number of available discrete cosine transform (DCT) and discrete sine transform (DST) for encoding and decoding. A video coder may determine one or more transforms or inverse transforms to apply from a set of transforms or inverse transforms that includes DCT-2 or inverse DCT-2, DST-7 or inverse DST-7, DST-8 or inverse DST-8, DCT-3 or inverse DCT-3, DST-2 or inverse DST-2, DST-3 or inverse DST-3, DCT-4 or inverse DCT-4, DST-4 or inverse DST-4, DST-5 or inverse DST-5, DST-6 or inverse DST-6, and identity transform an inverse identity transform (IDT).

公开(公告)号：US20200007889A1

公开(公告)日：2020-01-02

申请号：US16455444

申请日：2019-06-27

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/52 ,  H04N19/176 ,  H04N19/70 ,  H04N19/96

Abstract: An example device for coding video data includes a memory configured to store video data; and one or more processors implemented in circuitry and configured to: construct a motion vector predictor candidate list for a current block of the video data, the motion vector predictor candidate list identifying one or more blocks that are non-adjacent to the current block, each of the non-adjacent blocks being in a coding tree unit (CTU) including the current block or a line buffer including the current block; select a motion vector predictor from one of the blocks that is non-adjacent to the current block and in the motion vector predictor candidate list; and code motion information of the current block using the motion vector predictor.

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.

公开(公告)号：US20190208225A1

公开(公告)日：2019-07-04

申请号：US16225393

申请日：2018-12-19

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/61 ,  H04N19/13 ,  H04N19/70 ,  H04N19/124 ,  H04N19/18 ,  H04N19/176

CPC classification number: H04N19/61 ,  H04N19/124 ,  H04N19/13 ,  H04N19/176 ,  H04N19/18 ,  H04N19/70

Abstract: A device for coding video data is configured to determine a predicted sign value for a transform coefficient of a current block of a current picture of the video data. The device may further determine, based on a quantized value for the transform coefficient being greater or less than a threshold, a Context Adaptive Binary Arithmetic Coding (CABAC) context. Additionally, the device may use the determined CABAC context to CABAC code a syntax element indicating whether the predicted sign value for the transform coefficient is correct.