公开(公告)号：US11683489B2

公开(公告)日：2023-06-20

申请号：US17132836

申请日：2020-12-23

Applicant: QUALCOMM Incorporated

Inventor： Yung-Hsuan Chao ,  Vadim Seregin ,  Marta Karczewicz

IPC: H04N19/119 ,  H04N19/176 ,  H04N19/157 ,  H04N19/70 ,  H04N19/186

CPC classification number: H04N19/119 ,  H04N19/157 ,  H04N19/176 ,  H04N19/186 ,  H04N19/70

Abstract: A method of decoding video data includes determining that a current block of the video data is coded in palette mode, determining, between single tree or dual tree partitioning, that the current block is coded with single tree partitioning enabled, determining that the current block is coded in monochrome format, when the current block is coded with single tree partitioning enabled and when the current block is coded in monochrome format, determining that a number of color components used for palette mode decoding the current block is equal to one, and palette mode decoding the current block based on the determined number of color components used for palette mode decoding the current block being equal to one.

公开(公告)号：US11627327B2

公开(公告)日：2023-04-11

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 ,  H04N19/176 ,  H04N19/13 ,  H04N19/91

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：US11470334B2

公开(公告)日：2022-10-11

申请号：US17028928

申请日：2020-09-22

Applicant: QUALCOMM Incorporated

Inventor： Marta Karczewicz ,  Hongtao Wang ,  Yung-Hsuan Chao ,  Muhammed Zeyd Coban

IPC: H04N19/189 ,  H04N19/105 ,  H04N19/176 ,  H04N19/70 ,  H04N19/91

Abstract: Embodiments are directed to systems and methods of using rice code in video coding. In one embodiment includes a method of encoding or decoding video data, e.g., on a video encoder or decoder. The method includes determining available residual coefficients neighboring a current position in a transform unit of video data and determining a sum of the available residual coefficients. The method further includes modifying the sum based on the number of available residual coefficients and determining a rice parameter based on the modified sum. The method further includes encoding or decoding a syntax element of video data based on the determined rice parameter.

公开(公告)号：US11277611B2

公开(公告)日：2022-03-15

申请号：US16934679

申请日：2020-07-21

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/124 ,  H04N19/176 ,  H04N19/96 ,  H04N19/91 ,  H04N19/159

Abstract: A method of decoding video data includes receiving encoded data for a current block of the video data, the current block comprising one or more escape mode encoded samples and decoding, from the encoded data, a value indicating that the current block includes the one or more escape mode encoded samples. The method further includes, in response to determining that the value indicates that the current block includes the one or more escape mode encoded samples and that a current tree type for the current block is not dual tree chroma, decoding an absolute value for a luma delta quantization parameter for the current block and a sign for the luma delta quantization parameter. The method further includes reconstructing the current block based on the absolute value for the luma delta quantization parameter for the current block and the sign for the luma delta quantization parameter.

公开(公告)号：US11259052B2

公开(公告)日：2022-02-22

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 ,  H04N19/61 ,  H04N19/20

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：US11202101B2

公开(公告)日：2021-12-14

申请号：US16815605

申请日：2020-03-11

Applicant: QUALCOMM Incorporated

Inventor： Yung-Hsuan Chao ,  Marta Karczewicz

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

Abstract: A video decoder may divide a current coding unit (CU) of video data into a plurality of index groups. The video decoder may decode syntax elements common to all of the index groups and then separately and sequentially decode syntax elements for each of the index groups. By first decoding the syntax elements used by all the index groups and then separately grouping the decoding of the syntax elements for the index groups, the video decoder may begin the construction process of some samples of the current CU without having to wait to complete decoding of all of the syntax elements of the current CU. As such, the techniques of this disclosure may decrease the amount of time required and/or the delay introduced by the decoding process.

公开(公告)号：US11128876B2

公开(公告)日：2021-09-21

申请号：US16816107

申请日：2020-03-11

Applicant: QUALCOMM Incorporated

Inventor： Yung-Hsuan Chao ,  Muhammed Zeyd Coban ,  Hongtao Wang ,  Marta Karczewicz

IPC: H04N19/186 ,  H04N19/176 ,  H04N19/61 ,  H04N19/50 ,  H04N19/70

Abstract: A video decoder configured to receive a first syntax element indicating if any coding group (CG) of a plurality of CGs includes at least one non-zero coefficient, wherein the plurality of CGs includes a luma CG and at least one chroma CG; in response to the first syntax element indicating that a CG of a plurality of CGs includes at least one non-zero coefficient, receive, for each CG of the plurality of CGs, a flag indicating if a corresponding CG of the plurality of CGs includes at least one non-zero coefficient; and for a CG with a corresponding flag indicating that the CG includes at least one non-zero coefficient, receive additional syntax indicating values for coefficients of the CG.

公开(公告)号：US20210092376A1

公开(公告)日：2021-03-25

申请号：US17028492

申请日：2020-09-22

Applicant: QUALCOMM Incorporated

Inventor： Alican Nalci ,  Hilmi Enes Egilmez ,  Yung-Hsuan Chao ,  Muhammed Zeyd Coban ,  Hongtao Wang ,  Marta Karczewicz

IPC: H04N19/119 ,  H04N19/46 ,  H04N19/176 ,  H04N19/103 ,  H04N19/18

Abstract: A video decoder may be configured to determine whether a block of video data is to be further partitioned based on the size of the block of video data and a lossless coding flag. A video decoder may decode a lossless coding flag for a block of video data, wherein the block of video data is in a picture that includes both lossy coded blocks and lossless coded blocks, determine that the lossless coding flag indicates a lossless coding mode for the block, and partition the block into sub-blocks based on a size of the block and the determination of the lossless coding mode.

公开(公告)号：US10958900B2

公开(公告)日：2021-03-23

申请号：US16705174

申请日：2019-12-05

Applicant: QUALCOMM Incorporated

Inventor： Yung-Hsuan Chao ,  Dmytro Rusanovskyy ,  Yu Han ,  Wei-Jung Chien ,  Vadim Seregin ,  Marta Karczewicz

IPC: H04N19/105 ,  H04N19/176 ,  H04N19/159 ,  H04N19/137

Abstract: Embodiments include systems and methods of generating merge candidates for an inter-prediction mode of a video block. In particular, embodiments include methods of generating spatial-temporal motion vector predictor candidates. Embodiments may include video encoders and video decoders.

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.