公开(公告)号：US20240029317A1

公开(公告)日：2024-01-25

申请号：US18350887

申请日：2023-07-12

Applicant: QUALCOMM Incorporated

Inventor： Adarsh Krishnan Ramasubramonian ,  Reetu Hooda ,  Geert Van der Auwera ,  Marta Karczewicz

IPC: G06T9/00 ,  G06F5/01

CPC classification number: G06T9/001 ,  G06F5/01

Abstract: A point cloud encoder and point cloud decoder are configured to convert Cartesian coordinates of a point of point cloud data to spherical coordinates. The spherical coordinates include a radius, an azimuth value, and a laser ID. The point cloud encoder and point cloud decoder may perform the conversion for the azimuth value using a fixed-point implementation using a variable shift value based on a number of bits used for coding azimuth.

公开(公告)号：US20240015337A1

公开(公告)日：2024-01-11

申请号：US18346613

申请日：2023-07-03

Applicant: QUALCOMM Incorporated

Inventor： Nan Hu ,  Marta Karczewicz ,  Vadim Seregin

IPC: H04N19/86 ,  H04N19/176 ,  H04N19/117

CPC classification number: H04N19/86 ,  H04N19/176 ,  H04N19/117

Abstract: A device for decoding video data may be configured to apply a deblocking filter to a block of video data to determine a first filtered block; apply a second filter to the block of video data in parallel with the deblocking filter to determine a second filtered block, wherein the second filter comprises one of a guided filter, a bilateral filter, or an adaptive loop filter; combine the first filtered block and the second filtered block to determine a combined block; apply a third filter to the combined block to determine a third filtered block; process the third filtered block to determine a decoded version of the block of video data; and output the decoded version of the block of video data.

公开(公告)号：US20240015312A1

公开(公告)日：2024-01-11

申请号：US18331674

申请日：2023-06-08

Applicant: QUALCOMM Incorporated

Inventor： Hongtao Wang ,  Samuel James Eadie ,  Muhammed Zeyd Coban ,  Marta Karczewicz

IPC: H04N19/186 ,  H04N19/70 ,  H04N19/42 ,  H04N19/176 ,  H04N19/80 ,  H04N19/124

CPC classification number: H04N19/186 ,  H04N19/70 ,  H04N19/42 ,  H04N19/176 ,  H04N19/80 ,  H04N19/124

Abstract: A method of processing video data includes receiving a syntax element that defines a filtering mode for a neural network (NN) model for both a first color component and a second color component, applying an instance of the NN model, in the defined filtering mode, to a first block of the first color component to generate a first filtered block, and storing the first filtered block for a coding unit (CU).

公开(公告)号：US20240015280A1

公开(公告)日：2024-01-11

申请号：US18338756

申请日：2023-06-21

Applicant: QUALCOMM Incorporated

Inventor： Yao-Jen Chang ,  Keming Cao ,  Vadim Seregin ,  Marta Karczewicz

IPC: H04N19/105 ,  H04N19/132 ,  H04N19/186 ,  H04N19/176

CPC classification number: H04N19/105 ,  H04N19/132 ,  H04N19/186 ,  H04N19/176

Abstract: A method of coding video data comprises determining, based on a comparison of a threshold and a quantity of reference samples in a selected template, whether the selected template is allowed, wherein a mode index indicates which template from among a plurality of templates is the selected template, wherein each of the templates includes a different set of reconstructed samples that neighbor a current coding unit (CU) of a current picture of the video data; based on determining that the selected template is allowed and that a convolutional cross-component model (CCCM) mode is to be used, applying the CCCM mode to predict chroma samples of the current CU based on reconstructed luma samples of the current CU and the reference samples in the selected template; and; and encoding or decoding the current CU based on the predicted chroma samples of the current CU.

公开(公告)号：US11871010B2

公开(公告)日：2024-01-09

申请号：US17326588

申请日：2021-05-21

Applicant: QUALCOMM Incorporated

Inventor： Hilmi Enes Egilmez ,  Vadim Seregin ,  Marta Karczewicz

IPC: H04N19/18 ,  H04N19/176 ,  H04N19/159 ,  H04N19/117

CPC classification number: H04N19/18 ,  H04N19/117 ,  H04N19/159 ,  H04N19/176

Abstract: A video decoder can be configured to determine a number of allowed non-zero coefficients for a block of video data based on a size of the block; obtain a set of dequantized coefficients for the block, wherein the set of dequantized coefficients comprises a first subset of dequantized coefficients that includes non-zero dequantized coefficients and a second subset of dequantized coefficients that includes all zero coefficients, wherein a number of coefficients in the first subset of dequantized coefficients is equal to the number of allowed non-zero coefficients for the block of video data; apply an inverse low-frequency non-separable transform (LFNST) to the first subset of dequantized coefficients to determine a first intermediate subset of coefficients; and apply an inverse separable transform to the first intermediate subset of coefficients and at least a portion of the second subset of coefficients to determine a block of reconstructed residual values.

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：US11849133B2

公开(公告)日：2023-12-19

申请号：US17547015

申请日：2021-12-09

Applicant: QUALCOMM Incorporated

Inventor： Dmytro Rusanovskyy ,  Marta Karczewicz

IPC: H04N19/44 ,  H04N19/132 ,  H04N19/176 ,  H04N19/70 ,  H04N19/18 ,  H04N19/105

CPC classification number: H04N19/44 ,  H04N19/105 ,  H04N19/132 ,  H04N19/176 ,  H04N19/18 ,  H04N19/70

Abstract: Techniques are described herein for processing video data using a history-based rice parameter derivation. For instance, a process can include obtaining a transform block including a plurality of samples. One or more parameters (e.g., rice parameters) can be determined for the plurality of samples by analyzing a local neighborhood of a current sample of the plurality of samples and determining that a number of neighboring transform coefficients of the current sample is less than a threshold amount. A historic parameter value (e.g., a historic rice parameter value) determined from one or more previously decoded transform blocks can be obtained and, based at least in part on the historic parameter value, a parameter (e.g., a rice parameter) can be determined for the current sample. The current sample can be decoded based on the determined parameter for the current sample.

公开(公告)号：US20230379503A1

公开(公告)日：2023-11-23

申请号：US18362832

申请日：2023-07-31

Applicant: QUALCOMM Incorporated

Inventor： Adarsh Krishnan Ramasubramonian ,  Bappaditya Ray ,  Geert Van der Auwera ,  Louis Joseph Kerofsky ,  Marta Karczewicz

IPC: H04N19/70 ,  H04N19/119 ,  H04N19/597 ,  H04N19/136 ,  H04N19/174

CPC classification number: H04N19/70 ,  H04N19/119 ,  H04N19/597 ,  H04N19/136 ,  H04N19/174

Abstract: An example device for decoding point cloud data includes memory configured to store the point cloud data and one or more processors implemented in circuitry and coupled to the memory. The one or more processors are configured to determine dimensions of a region box and determine dimensions of a slice bounding box. The one or more processors are also configured to decode a slice of the point cloud data associated with the slice bounding box. The dimensions of the region box are constrained to not exceed the dimensions of the slice bounding box.

公开(公告)号：US11825101B2

公开(公告)日：2023-11-21

申请号：US17493543

申请日：2021-10-04

Applicant: QUALCOMM Incorporated

Inventor： Jianle Chen ,  Hongtao Wang ,  Venkata Meher Satchit Anand Kotra ,  Marta Karczewicz

IPC: H04N19/00 ,  H04N19/186 ,  H04N19/117 ,  G06N3/10 ,  G06N3/04 ,  H04N19/176

CPC classification number: H04N19/186 ,  G06N3/04 ,  G06N3/10 ,  H04N19/117 ,  H04N19/176

Abstract: An example device for decoding video data includes a memory configured to store video data; and one or more processors implemented in circuitry and configured to: apply a downsampling convolutional neural network layer to a first color component of a block of video data, the first color component of the block having a first size, wherein applying the downsampling convolutional neural network layer to the first color component generates a downsampled first color component having a second size smaller than the first size; filter a second color component having the second size to form a filtered second color component; concatenate the downsampled first color component with the filtered second color component to form concatenated color components; and filter the concatenated color components to form a filtered concatenated component including a filtered downsampled first color component.

公开(公告)号：US11825073B2

公开(公告)日：2023-11-21

申请号：US17205578

申请日：2021-03-18

Applicant: QUALCOMM Incorporated

Inventor： Yong He ,  Vadim Seregin ,  Muhammed Zeyd Coban ,  Adarsh Krishnan Ramasubramonian ,  Marta Karczewicz

IPC: H04N19/70 ,  H04N19/105 ,  H04N5/40 ,  H04N19/169 ,  H04N19/176 ,  H04N19/172

CPC classification number: H04N19/105 ,  H04N5/40 ,  H04N19/172 ,  H04N19/176 ,  H04N19/188 ,  H04N19/70

Abstract: A video encoder maintains a first reference picture list; maintains a second reference picture list; determines that a picture is an instantaneous decoding refresh (IDR) picture; determines that reference picture list syntax elements are present in a slice header for the IDR picture; and in response to determining that the picture is the IDR picture and that the reference picture list syntax elements are present in the slice header for the IDR picture, updates the first reference picture list and the second reference picture list such that no picture in the first reference picture list and no picture in the second reference picture list precedes, in output order or decoding order, any preceding instant random access point (IRAP) picture in decoding order.