公开(公告)号：US20240414333A1

公开(公告)日：2024-12-12

申请号：US18734814

申请日：2024-06-05

Applicant: QUALCOMM Incorporated

Inventor： Ikram Jumakulyyev ,  Nan Hu ,  Vadim Seregin ,  Marta Karczewicz

IPC: H04N19/117 ,  H04N19/124 ,  H04N19/159 ,  H04N19/174 ,  H04N19/176 ,  H04N19/186 ,  H04N19/70 ,  H04N19/82 ,  H04N19/86

Abstract: A device for decoding video data, as part of applying a first stage of an adaptive loop filter (ALF) to a reconstructed sample of a reconstructed block for a color component, selects a first set of filters from a plurality of sets of fixed filters based on a quantization parameter of the block of video data and a second characteristic of the block of video data; determines a first class index for the reconstructed sample; selects a filter from a first set of filters based on the first class index; and applies the filter from the first set of filters to the reconstructed sample to determine a first intermediate sample value.

公开(公告)号：US20240357095A1

公开(公告)日：2024-10-24

申请号：US18605416

申请日：2024-03-14

Applicant: QUALCOMM Incorporated

Inventor： Marta Karczewicz ,  Nan Hu ,  Vadim Seregin

IPC: H04N19/117 ,  H04N19/176 ,  H04N19/82

CPC classification number: H04N19/117 ,  H04N19/176 ,  H04N19/82

Abstract: An example device includes one or more memories and one or more processors coupled to the one or more memories. The one or more processors are configured to determine a first value associated with a first window, the first window including a target block of video data. The one or more processors are configured to determine a respective difference between each sample value within a second window and the first value, the second window including the target block. The one or more processors are configured to determine a second value based on the respective differences. The one or more processors are configured to determine a Laplacian activity value of the target block. The one or more processors are configured to determine a class index based on the second value and the Laplacian activity value and decode the target block based on the class index.

公开(公告)号：US20240297989A1

公开(公告)日：2024-09-05

申请号：US18589777

申请日：2024-02-28

Applicant: QUALCOMM Incorporated

Inventor： Han Huang ,  Cheng-Teh Hsieh ,  Nan Hu ,  Vadim Seregin ,  Marta Karczewicz

IPC: H04N19/117 ,  H04N19/103 ,  H04N19/132 ,  H04N19/136 ,  H04N19/176

CPC classification number: H04N19/117 ,  H04N19/103 ,  H04N19/132 ,  H04N19/136 ,  H04N19/176

Abstract: A device for decoding video data can be configured to determine a prediction block for a current block of the video data; determine a residual block for the current block of the video data; process residual data of the residual block to determine processed residual data; store the processed residual data; add the prediction block to the residual block to determine a reconstructed block; and perform adaptive loop filtering (ALF) on the reconstructed block, based on the processed residual data.

公开(公告)号：US11716468B2

公开(公告)日：2023-08-01

申请号：US17128005

申请日：2020-12-19

Applicant: Qualcomm Incorporated

Inventor： Nan Hu ,  Vadim Seregin ,  Marta Karczewicz

IPC: H04N19/117 ,  H04N19/82 ,  H04N19/176 ,  H04N19/186 ,  H04N19/46

CPC classification number: H04N19/117 ,  H04N19/176 ,  H04N19/186 ,  H04N19/46 ,  H04N19/82

Abstract: A device capable of compressing video data includes a memory configured to store a luma new filter value, a chroma new filter value, a cross component Cb new filter value, and a cross component Cr new filter value. The device may also include one or more processors, coupled to the memory, configured to set a joint constraint on the luma new filter value, the chroma new filter value, the cross component Cb new filter value, and the cross component Cr new filter value, such that each of the luma new filter value, the chroma new filter value, the cross component Cb new filter value, and the cross component Cr new filter value are not disabled in a unit associated with an adaptation parameter set having a first adaptation parameter set identification (APS ID).

公开(公告)号：US11563963B2

公开(公告)日：2023-01-24

申请号：US17322510

申请日：2021-05-17

Applicant: QUALCOMM Incorporated

Inventor： Nan Hu ,  Vadim Seregin ,  Yong He ,  Marta Karczewicz

IPC: H04N19/44 ,  H04N19/117 ,  H04N19/82 ,  H04N19/174 ,  H04N19/46 ,  H04N19/159 ,  H04N19/169 ,  H04N19/70

Abstract: An example device for decoding video data, the device including a memory configured to store video data; and one or more processors implemented in circuitry and configured to: determine that adaptive loop filter (ALF) information can be present in a picture header of a picture of the video data and cannot be present in a slice header; in response to determining that the ALF information can be present in the picture header and cannot be present in the slice header, determine that a picture header syntax structure is not present in the slice header (e.g., without decoding data representing a value for a syntax element indicating whether the picture header syntax structure is present in the slice header); and decode the picture according to the determination that the picture header syntax structure is not present in the slice header.

公开(公告)号：US20220400292A1

公开(公告)日：2022-12-15

申请号：US17806192

申请日：2022-06-09

Applicant: QUALCOMM Incorporated

Inventor： Venkata Meher Satchit Anand Kotra ,  Nan Hu ,  Vadim Seregin ,  Marta Karczewicz

IPC: H04N19/82 ,  H04N19/117 ,  H04N19/132 ,  H04N19/85

Abstract: A video encoder or video decoder are configured to reconstruct the video data to generate reconstructed video data. The video encoder or video decoder may further perform a plurality of loop filter operations on the reconstructed video data in parallel, wherein the plurality of loop filter operations includes a first filter operation that is not a bilateral filter operation or a sample adaptive offset (SAO) filter operation, and perform a joint clipping operation on a first output of the first filter and a second output of a second loop filter operation of the plurality of loop filter operations. The first filter operation may be a cross-component sample adaptive offset (CCSAO) filter operation.

公开(公告)号：US11418779B2

公开(公告)日：2022-08-16

申请号：US16897049

申请日：2020-06-09

Applicant: QUALCOMM Incorporated

Inventor： Nan Hu ,  Vadim Seregin ,  Hilmi Enes Egilmez ,  Marta Karczewicz

IPC: H04N19/17 ,  H04N19/117 ,  H04N19/46 ,  H04N19/186 ,  H04N19/176

Abstract: A video coder is configured to code an adaptive loop filter (ALF) clipping index as a fixed-length unsigned integer. The video coder may apply, based on the ALF clipping index, an ALF to a block of a picture of the video data.

公开(公告)号：US11412262B2

公开(公告)日：2022-08-09

申请号：US16909603

申请日：2020-06-23

Applicant: QUALCOMM Incorporated

Inventor： Hilmi Enes Egilmez ,  Nan Hu ,  Vadim Seregin ,  Marta Karczewicz

IPC: H04N19/70 ,  H04N19/17 ,  H04N19/117 ,  H04N19/64

Abstract: A video coder may be configured to code video data by performing adaptive loop filtering processes. A video coder may decode a syntax element that indicates a manner in which to perform an adaptive loop filtering process, the syntax element indicating that a nonlinear operation is to be applied to the video data, where the nonlinear operation is configured to be applied in combination with a filtering operation of the adaptive loop filtering process. In addition, the video coder may perform the adaptive loop filtering process based on the syntax element.

公开(公告)号：US20210314579A1

公开(公告)日：2021-10-07

申请号：US17218898

申请日：2021-03-31

Applicant: QUALCOMM Incorporated

Inventor： Nan Hu ,  Vadim Seregin ,  Muhammed Zeyd Coban ,  Marta Karczewicz

IPC: H04N19/186 ,  H04N19/70 ,  H04N19/176 ,  H04N19/103 ,  H04N19/50 ,  H04N19/82

Abstract: A method of coding video data includes determining that chroma related syntax elements of the video data are present for luma mapping with chroma scaling (LMCS) for a coding unit (CU) of the video data, coding a syntax element of the video data when the chroma related syntax elements are present for LMCS for the CU, the syntax element is indicative of a value for determining a scaling parameter for chroma scaling in LMCS, and coding a chroma block of the CU based on the scaling parameter for chroma scaling.

公开(公告)号：US20210152841A1

公开(公告)日：2021-05-20

申请号：US17096740

申请日：2020-11-12

Applicant: QUALCOMM Incorporated

Inventor： Nan Hu ,  Vadim Seregin ,  Cheng-Teh Hsieh ,  Marta Karczewicz

IPC: H04N19/44 ,  H04N19/105 ,  H04N19/132 ,  H04N19/117 ,  H04N19/82 ,  H04N19/186 ,  H04N19/176

Abstract: An example device for decoding video data includes one or more processors implemented in circuitry and configured to: decode a coding tree unit (CTU) of video data, the CTU including a luminance (luma) block and a chrominance (chroma) block, to produce a decoded luma block and a decoded chroma block; determine that a chroma sample of the decoded chroma block is on a first side of an adaptive loop filter (ALF) virtual boundary and that a co-located luma sample of the decoded luma block is on a second side of the ALF virtual boundary, the co-located luma sample being co-located with the chroma sample, the first side being different than the second side; and in response to determining that the chroma sample is on the first side and the luma sample is on the second side, disable cross-component adaptive loop filtering (CC-ALF) for the chroma sample.