公开(公告)号：US20230199226A1

公开(公告)日：2023-06-22

申请号：US18168925

申请日：2023-02-14

Applicant: QUALCOMM Incorporated

Inventor： Alican Nalci ,  Marta Karczewicz ,  Muhammed Zeyd Coban

IPC: H04N19/70 ,  H04N19/124 ,  H04N19/174 ,  H04N19/176 ,  H04N19/46

CPC classification number: H04N19/70 ,  H04N19/124 ,  H04N19/174 ,  H04N19/176 ,  H04N19/46

Abstract: An example device includes memory and one or more processors implemented in circuitry and communicatively coupled to the memory. The one or more processors are configured to receive a first slice header syntax element for a slice of the video data and determine a first value for the first slice header syntax element, the first value being indicative of whether dependent quantization is enabled. The one or more processors are configured to receive a second slice header syntax element for the slice of the video data and determine a second value for the second slice header syntax element, the second value being indicative of whether sign data hiding is enabled. The one or more processors are configured to determine whether transform skip residual coding is disabled for the slice based on the first value and the second value and decode the slice based on the determinations.

公开(公告)号：US20210314625A1

公开(公告)日：2021-10-07

申请号：US17220829

申请日：2021-04-01

Applicant: QUALCOMM Incorporated

Inventor： Alican Nalci ,  Marta Karczewicz ,  Muhammed Zeyd Coban

IPC: H04N19/70 ,  H04N19/124 ,  H04N19/46 ,  H04N19/176 ,  H04N19/174

Abstract: An example device includes memory and one or more processors implemented in circuitry and communicatively coupled to the memory. The one or more processors are configured to receive a first slice header syntax element for a slice of the video data and determine a first value for the first slice header syntax element, the first value being indicative of whether dependent quantization is enabled. The one or more processors are configured to receive a second slice header syntax element for the slice of the video data and determine a second value for the second slice header syntax element, the second value being indicative of whether sign data hiding is enabled. The one or more processors are configured to determine whether transform skip residual coding is disabled for the slice based on the first value and the second value and decode the slice based on the determinations.

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：US11973983B2

公开(公告)日：2024-04-30

申请号：US17066308

申请日：2020-10-08

Applicant: QUALCOMM Incorporated

Inventor： Marta Karczewicz ,  Muhammed Zeyd Coban ,  Alican Nalci ,  Hilmi Enes Egilmez

IPC: H04N19/61 ,  H04N19/103 ,  H04N19/124 ,  H04N19/176 ,  H04N19/46 ,  H04N19/70

CPC classification number: H04N19/61 ,  H04N19/103 ,  H04N19/124 ,  H04N19/176 ,  H04N19/46 ,  H04N19/70

Abstract: An example method of decoding video data that includes receiving one or more syntax elements of the video data indicative of whether a first type of coding scheme or a second type of coding scheme is applied to residual values of a block of video data coded with transform skip, wherein the residual values are indicative of a difference between the block and a prediction block, and wherein, in transform skip, the residual values are not transformed from a sample domain to a frequency domain. The method includes determining a type of coding scheme to apply to the residual values based on the one or more syntax elements, determining the residual values based on the determined type of coding scheme, and reconstructing the block based on the determined residual values and the prediction block.

公开(公告)号：US11418787B2

公开(公告)日：2022-08-16

申请号：US16912232

申请日：2020-06-25

Applicant: QUALCOMM Incorporated

Inventor： Yu Han ,  Geert Van der Auwera ,  Muhammed Zeyd Coban ,  Wei-Jung Chien ,  Yung-Hsuan Chao ,  Alican Nalci ,  Marta Karczewicz

IPC: H04N19/186 ,  H04N19/124 ,  H04N19/176 ,  H04N19/169 ,  H04N19/70

Abstract: A video decoder can be configured to determine a predicted luma quantization parameter (QP) for a luma component of a coding unit; receive, in the bitstream of encoded video data, first syntax indicating a luma delta QP value for the luma component; determine a QP value for the luma component based on the predicted luma QP and the luma delta QP value; determine a predicted chroma QP for a chroma component of the coding unit; receive, in the bitstream of encoded video data, second syntax indicating a chroma delta QP value for the chroma component of the coding unit; and determine a QP value for the chroma component of the coding unit based on the predicted chroma QP and the chroma delta QP value.

公开(公告)号：US11381819B2

公开(公告)日：2022-07-05

申请号：US16918741

申请日：2020-07-01

Applicant: QUALCOMM Incorporated

Inventor： Yu Han ,  Geert Van der Auwera ,  Muhammed Zeyd Coban ,  Wei-Jung Chien ,  Yung-Hsuan Chao ,  Alican Nalci ,  Marta Karczewicz

IPC: H04N19/124 ,  H04N19/176 ,  H04N19/96 ,  H04N19/463 ,  H04N19/186

Abstract: Examples of block-level signaling of quantization parameter offsets is described. Such block-level signaling of quantization parameter offsets provides block level flexibility to determine a more precise chroma quantization parameter (QP) for a chroma block. With the block-level quantization parameter offset signaling described in this disclosure, there is more flexibility in defining the chroma QP, resulting in more accurate determination of chroma QP on a chroma block-by-chroma block basis.

公开(公告)号：US20210176468A1

公开(公告)日：2021-06-10

申请号：US17109958

申请日：2020-12-02

Applicant: QUALCOMM Incorporated

Inventor： Alican Nalci ,  Hongtao Wang ,  Muhammed Zeyd Coban ,  Marta Karczewicz

IPC: H04N19/12 ,  H04N19/14 ,  H04N19/196 ,  H04N19/13 ,  H04N19/61 ,  H04N19/176 ,  H04N19/103

Abstract: A video coder may determine a quantization parameter (QP) value for a block of video data, determine a residual coding method from a plurality of residual coding methods based on the QP value, wherein the plurality of residual coding methods include transform skip (TS) residual coding and regular residual coding, and code a residual of the block of video data using the determined residual coding method.

公开(公告)号：US20230412844A1

公开(公告)日：2023-12-21

申请号：US18321372

申请日：2023-05-22

Applicant: QUALCOMM Incorporated

Inventor： Alican Nalci ,  Hilmi Enes Egilmez ,  Vadim Seregin ,  Muhammed Zeyd Coban ,  Marta Karczewicz

IPC: H04N19/645 ,  H04N19/18 ,  H04N19/124 ,  H04N19/70 ,  H04N19/186 ,  H04N19/176

CPC classification number: H04N19/645 ,  H04N19/18 ,  H04N19/176 ,  H04N19/70 ,  H04N19/186 ,  H04N19/124

Abstract: A video decoder determines, based on a block size of a current block and a low-frequency non-separable transform (LFNST) syntax element, a zero-out pattern of normatively defined zero-coefficients. The LFNST syntax element is signaled at a transform unit (TU) level. Additionally, the video decoder determines transform coefficients of the current block. The transform coefficients of the current block include transform coefficients in an LFNST region of the current block and transform coefficients outside the LFNST region of the current block. As part of determining the transform coefficients of the current block, the video decoder applies an inverse LFNST to determine values of one or more transform coefficients in the LFNST region of the current block. The video decoder also determines that transform coefficients of the current block in a region of the current block defined by the zero-out pattern are equal to 0.

公开(公告)号：US11582491B2

公开(公告)日：2023-02-14

申请号：US17210918

申请日：2021-03-24

Applicant: QUALCOMM Incorporated

Inventor： Hilmi Enes Egilmez ,  Alican Nalci ,  Vadim Seregin ,  Marta Karczewicz

IPC: H04N19/96 ,  H04N19/169 ,  H04N19/186 ,  H04N19/176 ,  H04N19/91

Abstract: An example video codec 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 that a current mode of coding a current block of the video data is a single tree partitioning mode. Based on the current mode being the single tree partitioning mode, the one or more processors are configured to refrain from determining whether there is a non-DC coefficient for a chroma component of a transform unit (TU) for the current block and refrain from coding a low-frequency non-separable transformation (LFNST) index in response to the refraining of the determination of whether there is the non-DC coefficient. The one or more processors are configured to code the current block in the single partitioning mode with LFNST disabled.

公开(公告)号：US20210297685A1

公开(公告)日：2021-09-23

申请号：US17205883

申请日：2021-03-18

Applicant: QUALCOMM Incorporated

Inventor： Marta Karczewicz ,  Alican Nalci ,  Muhammed Zeyd Coban ,  Vadim Seregin

IPC: H04N19/44 ,  H04N19/105 ,  H04N19/189 ,  H04N19/176

Abstract: An example method of decoding video data includes determining that one or more lossy coding tools are enabled at a picture level or slice level for a picture or slice of video data that includes a current block, determining that the current block is decoded with transform skip, bypassing use of the one or more lossy coding tools for the current block based on the determination that the current block is decoded with transform skip, performing a residual coding scheme to generate a residual block, and reconstructing the current block based on the residual block.