公开(公告)号：US11825120B2

公开(公告)日：2023-11-21

申请号：US16800467

申请日：2020-02-25

Applicant: QUALCOMM Incorporated

Inventor： Adarsh Krishnan Ramasubramonian ,  Geert Van der Auwera ,  Cheng-Teh Hsieh ,  Vadim Seregin ,  Luong Pham Van ,  Marta Karczewicz

IPC: H04N7/12 ,  H04N19/645 ,  H04N19/174 ,  H04N19/176 ,  H04N19/159 ,  H04N19/436 ,  H04N19/189

CPC classification number: H04N19/645 ,  H04N19/159 ,  H04N19/174 ,  H04N19/176 ,  H04N19/189 ,  H04N19/436

Abstract: A video coder may be configured to code video data by performing splitting of a coding unit (CU) of video data using intra sub-partition (ISP) to form a set of prediction blocks. The video coder may group a plurality of the prediction blocks from the set of prediction blocks into a first prediction block group (PBG). The video coder may reconstruct samples of prediction blocks included in the first PBG independently of samples of other prediction blocks included in the first PBG.

公开(公告)号：US20230345044A1

公开(公告)日：2023-10-26

申请号：US18303373

申请日：2023-04-19

Applicant: QUALCOMM Incorporated

Inventor： Adarsh Krishnan Ramasubramonian ,  Geert Van der Auwera ,  Bappaditya Ray ,  Luong Pham Van ,  Marta Karczewicz

IPC: H04N19/597 ,  G06T19/00

CPC classification number: H04N19/597 ,  G06T19/006

Abstract: A device for decoding a point cloud includes a memory configured to store data representing the point cloud and one or more processors implemented in circuitry and configured to: decode a residual value; determine whether residual prediction is to be applied to a current point of the point cloud; in response to determining that residual prediction is to be applied to the current point of the point cloud: determine a residual predictor and add the residual predictor to the residual value to determine a final residual value; determine a predictor used to predict a current point of the point cloud; and use the predictor and the final residual value to determine a position of the current point.

公开(公告)号：US11743503B2

公开(公告)日：2023-08-29

申请号：US17319911

申请日：2021-05-13

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/70 ,  H04N19/174 ,  H04N19/172

CPC classification number: H04N19/70 ,  H04N19/172 ,  H04N19/174

Abstract: Example techniques and devices are disclosed. An example device for coding video data includes memory configured to store the video data and one or more processors implemented in circuitry and coupled to the memory. The one or more processors are configured to determine whether an entry in a reference picture list for a current picture is equal to no reference picture. Based on the entry being equal to no reference picture, the one or more processors are configured to determine additional information associated with the entry. The one or more processors are configured to check a constraint for the entry based on the additional information and code the current picture in accordance with the constraint.

公开(公告)号：US11651551B2

公开(公告)日：2023-05-16

申请号：US17484792

申请日：2021-09-24

Applicant: QUALCOMM Incorporated

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

IPC: G06T17/00 ,  G06T9/00 ,  G06T19/20

CPC classification number: G06T17/00 ,  G06T9/00 ,  G06T19/20 ,  G06T2210/36 ,  G06T2219/2016

Abstract: A device for decoding encoded point cloud data can be configured to: for a point of a point cloud, determine a first attribute value for a first color component based on a first predicted value and a first residual value; apply a scaling factor to the first residual value to determine a predicted second residual value, wherein the scaling factor has one or both of a non-integer value or an absolute value greater than one; for the point of the point cloud, receive a second residual value in the encoded point cloud data; determine a final second residual value based on the predicted second residual value and the received second residual value; and for the point of the point cloud, determine a second attribute value for a second color component based on a second predicted value and the final second residual value.

公开(公告)号：US11645812B2

公开(公告)日：2023-05-09

申请号：US17484525

申请日：2021-09-24

Applicant: QUALCOMM Incorporated

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

IPC: G06T17/00 ,  G06T9/00 ,  G06T19/20 ,  H04N13/161 ,  H04N19/70 ,  H04N19/186 ,  H04N19/50

CPC classification number: G06T17/00 ,  G06T9/00 ,  G06T19/20 ,  H04N13/161 ,  H04N19/186 ,  H04N19/50 ,  H04N19/70 ,  G06T2210/36 ,  G06T2219/2016

Abstract: A device for decoding encoded point cloud data can be configured to, for a point of a point cloud, determine a first color value for a first color component based on a first predicted value and a first residual value; apply a scaling factor to the first residual value to determine a predicted second residual value, wherein the scaling factor has one or both of a non-integer value or an absolute value greater than one; for the point of the point cloud, receive a second residual value in the encoded point cloud data; determine a final second residual value based on the predicted second residual value and the received second residual value; and for the point of the point cloud, determine a second color value for a second color component based on a second predicted value and the final second residual value.

公开(公告)号：US11641469B2

公开(公告)日：2023-05-02

申请号：US17147071

申请日：2021-01-12

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/124 ,  H04N19/51

Abstract: A video decoder can be configured to receive a syntax element indicating whether chroma scaling matrices are signaled for the video data; in response to determining that chroma scaling matrices are signaled for the video data, determine a chroma scaling matrix for a block of video data; determine a block of chroma transform coefficients for the block of video data; dequantize a first chroma transform coefficient of the block of chroma transform coefficients using a first scaling value from the chroma scaling matrix; dequantize a second chroma transform coefficient of the block of chroma transform coefficients using a second scaling value from the chroma quantization matrix; and determine a chroma residual block for the block of video data based on the first dequantized chroma transform coefficients and the second dequantized chroma transform coefficient.

公开(公告)号：US11432015B2

公开(公告)日：2022-08-30

申请号：US16921106

申请日：2020-07-06

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/80 ,  H04N19/119 ,  H04N19/172 ,  H04N19/174 ,  H04N19/176

Abstract: Systems, methods, and media are provided for loop filtering across raster scan slices. One example includes obtaining data comprising one or more pictures, including obtaining a first block located in a first slice of one of the pictures. The example then includes determining a second block is located in a second slice of the picture, the second block including one or more pixels for use in performing loop filtering of a pixel of the first block, and determining that loop filtering across slice boundaries is disabled. Based on this disabling, the example determines that the one or more pixels of the second block are unavailable for performing loop filtering of the pixel of the first block, and duplicates at least one pixel of the first block or at least one pixel of an additional block of the first slice for performing loop filtering of the pixel of the first block.

公开(公告)号：US11363284B2

公开(公告)日：2022-06-14

申请号：US16868982

申请日：2020-05-07

Applicant: QUALCOMM Incorporated

Inventor： Adarsh Krishnan Ramasubramonian ,  Geert Van der Auwera ,  Luong Pham Van ,  Marta Karczewicz

IPC: H04N19/176 ,  H04N19/159 ,  H04N19/117 ,  H04N19/44 ,  H04N19/105 ,  H04N19/132

Abstract: A device for decoding video data determine that a current block of video data is encoded in an affine linear weighted intra prediction (ALWIP) mode; derives, based on a set of left edge neighboring samples of the current block and a set of top edge neighboring samples of the current block, a subset of left edge samples and a subset of top edge samples; applies an affine model to the subset of left edge samples and the subset of top edge samples to generate an intermediate block of intermediate samples; filters the intermediate samples to generate a final prediction block; decodes the current block of video data based on the final prediction block.

公开(公告)号：US11356705B2

公开(公告)日：2022-06-07

申请号：US17130759

申请日：2020-12-22

Applicant: QUALCOMM Incorporated

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

IPC: H04B1/66 ,  H04N7/12 ,  H04N11/02 ,  H04N11/04 ,  H04N19/70 ,  H04N19/172 ,  H04N19/174 ,  H04N19/169 ,  H04N19/184

Abstract: A method of processing video data comprises obtaining a bitstream and locating intra random access pictures (IRAP) or Gradual Decoder Refresh (GDR) pictures among the encoded pictures in the bitstream. Locating the IRAP or GDR pictures may comprise obtaining, from a picture header Network Abstraction Layer (NAL) unit in the bitstream, a syntax element that indicates that a picture associated with the picture header NAL unit must be either an Intra Random Access Picture (IRAP) or a Gradual Decoder Refresh (GDR) picture. The picture header NAL unit contains syntax elements that apply to all slices of the picture associated with the picture header NAL unit.

公开(公告)号：US11350132B2

公开(公告)日：2022-05-31

申请号：US17143607

申请日：2021-01-07

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/70 ,  H04N19/597 ,  H04N19/174 ,  H04N19/30

Abstract: An example device for coding a point cloud includes a memory configured to store the point cloud and one or more processors communicatively coupled to the memory. The one or more processors are configured to determine a value of a numerator syntax element, the value of the numerator syntax element being indicative of a numerator of a scale factor of the point cloud. The one or more processors are configured to determine a value of a denominator syntax element, the value of the denominator syntax element being indicative of a denominator of the scale factor of the point cloud. The one or more processors are configured to process the point cloud at least in part based on the scale factor of the point cloud.