公开(公告)号：US20240357114A1

公开(公告)日：2024-10-24

申请号：US18633239

申请日：2024-04-11

Applicant: QUALCOMM Incorporated

Inventor： Pavel Nikitin ,  Muhammed Zeyd Coban ,  Bappaditya Ray ,  Vadim Seregin ,  Marta Karczewicz

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

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

Abstract: An example device for coding (encoding and decoding) video data includes: a memory configured to store video data; and a processing system comprising one or more processors implemented in circuitry, the processing system being configured to: determine a context for context-based coding a current transform coefficient of a current block of video data according to previously coded transform coefficients, the previously coded transform coefficients being a sequence of immediately preceding transform coefficients to the current transform coefficient in scan order; and context-based code the current transform coefficient using the determined context.

公开(公告)号：US20250119586A1

公开(公告)日：2025-04-10

申请号：US18891068

申请日：2024-09-20

Applicant: QUALCOMM Incorporated

Inventor： Marta Karczewicz ,  Pavel Nikitin ,  Muhammed Zeyd Coban ,  Vadim Seregin

IPC: H04N19/70 ,  H04N19/12 ,  H04N19/176 ,  H04N19/18 ,  H04N19/61

Abstract: A video coder may be configured to code a plurality of syntax elements that indicate an absolute value of a transform coefficients in a block, wherein the plurality of syntax elements include a significance flag and four or more greater_than_N flags. The video coder may further determine first respective contexts for each syntax element in a first set of the plurality of syntax elements from respective context tables for each syntax element in the first set of the plurality of syntax elements, and determine second respective contexts for each syntax element in a second set of the plurality of syntax elements from a shared context table.

公开(公告)号：US20240223769A1

公开(公告)日：2024-07-04

申请号：US18540046

申请日：2023-12-14

Applicant: QUALCOMM Incorporated

Inventor： Zhi Zhang ,  Pavel Nikitin ,  Han Huang ,  Vadim Seregin ,  Marta Karczewicz

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

CPC classification number: H04N19/137 ,  H04N19/105 ,  H04N19/176

Abstract: A method of decoding video data includes determining a vector predictor for a current block; determining a first set of vector difference candidates based on a first pel-interval, the first pel-interval defining a first distance between consecutive vector difference candidates in the first set of vector difference candidates starting with the vector predictor; determining a second set of vector difference candidates based on the first set of vector difference candidates and a second pel-interval, the second pel-interval defining a second distance between consecutive vector difference candidates in the second set of vector difference candidates; constructing a vector difference candidate list based on the second set of vector difference candidates; determining a vector for the current block based on the vector predictor and a vector difference from the vector difference candidate list; and reconstructing the current block based on the vector for the current block.

公开(公告)号：US20240414339A1

公开(公告)日：2024-12-12

申请号：US18734509

申请日：2024-06-05

Applicant: QUALCOMM Incorporated

Inventor： Marta Karczewicz ,  Muhammed Zeyd Coban ,  Pavel Nikitin

IPC: H04N19/124 ,  H04N19/176 ,  H04N19/186 ,  H04N19/50

Abstract: A method of processing video data includes determining a quantization level for a coefficient of a current block from a plurality of quantization levels; determining an offset value based on the quantization level, wherein the offset value is a first offset value based on the quantization level being a first quantization level or a second, different offset value based on the quantization level being a second quantization level; determining a quantization parameter or an inverse-quantization parameter for the coefficient based on the determined offset value; and as part of encoding or decoding the current block, performing one of quantization or inverse-quantization for the coefficient based on the determined quantization parameter or the determined inverse-quantization parameter.