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：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：US11611757B2

公开(公告)日：2023-03-21

申请号：US16371638

申请日：2019-04-01

Applicant: QUALCOMM Incorporated

Inventor： Geert Van der Auwera ,  Vadim Seregin ,  Amir Said ,  Marta Karczewicz

IPC: H04N19/105 ,  H04N19/139 ,  H04N19/159 ,  H04N19/176

Abstract: Techniques are described of using Position Dependent Intra Prediction Combination (PDPC). A video coder such as a video encoder or a video decoder utilizes PDPC in cases where a current block intra mode predicted using an angular intra prediction mode.

公开(公告)号：US11388443B2

公开(公告)日：2022-07-12

申请号：US17024458

申请日：2020-09-17

Applicant: QUALCOMM Incorporated

Inventor： Bappaditya Ray ,  Geert Van der Auwera ,  Marta Karczewicz

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

Abstract: A video coder determines whether a coding mode of a first block of the video data is in a set of applicable coding modes. The set of applicable coding modes includes at least one of a block-based delta pulse code modulation mode, a transform skip mode, or a palette mode. The video coder determines whether a coding mode of a second block of the video data is in the set of applicable coding modes, wherein the second block is adjacent to the first block. The video coder determines that a deblocking filter is disabled for a color component of at least one of the first block or the second block based on at least one of: the coding mode of the first block being in the set of applicable coding modes or the coding mode of the second block being in the set of applicable coding modes.

公开(公告)号：US11368715B2

公开(公告)日：2022-06-21

申请号：US17126585

申请日：2020-12-18

Applicant: QUALCOMM Incorporated

Inventor： Alican Nalci ,  Luong Pham Van ,  Marta Karczewicz ,  Geert Van der Auwera ,  Muhammed Zeyd Coban ,  Hilmi Enes Egilmez

IPC: H04N19/11 ,  H04N19/593 ,  H04N19/176 ,  H04N19/61 ,  H04N19/70 ,  H04N19/132 ,  H04N19/186

Abstract: A video encoder and video decoder may code video data using intra prediction and a block-based delta pulse code modulation (BDPCM) mode. The BDPCM mode may include a vertical mode and a horizontal mode. The video encoder and video decoder may be configured to align the direction of an intra prediction mode to the direction of a BDPCM mode for both luma and chroma blocks.

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：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.

公开(公告)号：US20220108486A1

公开(公告)日：2022-04-07

申请号：US17492095

申请日：2021-10-01

Applicant: QUALCOMM Incorporated

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

IPC: G06T9/00 ,  G06T9/40

Abstract: A G-PCC coder is configured to receive the point cloud data, determine a final quantization parameter (QP) value for the point cloud data as a function of a node QP offset multiplied by a geometry QP multiplier, and code the point cloud data using the final QP value to create an coded point cloud.