公开(公告)号：US20210385303A1

公开(公告)日：2021-12-09

申请号：US17342249

申请日：2021-06-08

Applicant: QUALCOMM Incorporated

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

IPC: H04L29/06 ,  H04L12/801

Abstract: An example method of encoding a point cloud includes determining that residual values for all components except one component of an attribute of a point in the point cloud are equal to zero; based on the determination that the residual values for all components except the one component of the attribute are equal to zero, determining a value for the one component that is equal to a magnitude of a residual value of the one component of the attribute minus an offset; encoding the value of the one component; and signaling the encoded value in a bitstream.

公开(公告)号：US11178427B2

公开(公告)日：2021-11-16

申请号：US16783748

申请日：2020-02-06

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/593 ,  H04N19/147 ,  H04N19/176

Abstract: An example device for coding (encoding or decoding) video data includes a memory configured to store video data; and one or more processors implemented in circuitry and configured to: partition a coding unit (CU) of video data into sub-blocks, the sub-blocks being arranged into a number of rows and a number of columns, the number of rows being greater than 1 and the number of columns being greater than 1; form intra-prediction blocks for each of the sub-blocks; and code the CU using the intra-prediction blocks.

公开(公告)号：US20210319595A1

公开(公告)日：2021-10-14

申请号：US17224674

申请日：2021-04-07

Applicant: QUALCOMM Incorporated

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

IPC: G06T9/20

Abstract: An example device for processing point cloud data includes a 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 count a number of edges of a cube of point cloud data comprising a vertex. The one or more processors are configured to set a variable based on a total of the counting. The one or more processors are also configured to process the point cloud data based on the variable.

公开(公告)号：US11128872B2

公开(公告)日：2021-09-21

申请号：US16510863

申请日：2019-07-12

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/159 ,  H04N19/52 ,  H04N19/105 ,  H04N19/96 ,  H04N19/593 ,  H04N19/176 ,  H04N19/11

Abstract: Techniques are described using Position Dependent Intra Prediction Combination (PDPC) with wide angle intra prediction. For example, a size of the current block of video data can be determined. Based on the size, a wide angle intra-prediction mode can be determined for the current block. A prediction block for the current block can be determined using the wide angle intra-prediction mode. A prediction sample from the prediction block can be modified to generate a modified prediction sample using PDPC, which can include determining one or more reference samples that are external to the current block based on the wide angle intra-prediction mode, and modifying the prediction sample to generate the modified prediction sample based on the determined one or more reference samples.

公开(公告)号：US20210203993A1

公开(公告)日：2021-07-01

申请号：US17136856

申请日：2020-12-29

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/625 ,  H04N19/186 ,  H04N19/147 ,  H04N19/176 ,  H04N19/12 ,  H04N19/132

Abstract: A method of encoding video data includes determining a first rate-distortion value associated with encoding a first chroma block of a coding unit of the video data with a first transform type, determining a second rate-distortion value associated with encoding the first chroma block of the coding unit of the video data with a second transform type, determining that the first transform type provides better rate-distortion than second transform type based on the first rate-distortion value and the second rate-distortion value, based on the determination that the first transform type provides better rate-distortion, determining a third rate-distortion value associated with encoding the coding unit with joint coding of chroma residuals (JCCR) with the first transform type, and avoiding determining a fourth rate-distortion value associated with encoding the coding unit with JCCR with the second transform type, and encoding the coding unit with JCCR with the first transform type.

公开(公告)号：US20210176464A1

公开(公告)日：2021-06-10

申请号：US17115544

申请日：2020-12-08

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/107 ,  H04N19/159 ,  H04N19/186 ,  H04N19/176

Abstract: A video decoder can be configured to receive, for a first chroma component of a block of the video data, information for first residual samples that correspond to a difference between a first chroma block of the first chroma component and a first prediction block of the first chroma component; determine intermediate reconstructed samples based on the first residual samples; receive, for a second chroma component of the block of video data, information for second residual samples that correspond to a difference between a second chroma block of the second chroma component and the intermediate reconstructed samples; reconstruct the first chroma block based on the first residual samples and the first prediction block; reconstruct the second chroma block based on the second residual samples and the intermediate reconstructed samples; and output decoded video data comprising the reconstructed first chroma block and the reconstructed second chroma block.

公开(公告)号：US20210092408A1

公开(公告)日：2021-03-25

申请号：US17024551

申请日：2020-09-17

Applicant: QUALCOMM Incorporated

Inventor： Adarsh Krishnan Ramasubramonian ,  Geert Van der Auwera ,  Vadim Seregin ,  Hilmi Enes Egilmez ,  Marta Karczewicz

IPC: H04N19/176 ,  H04N19/70 ,  H04N19/136 ,  H04N19/159 ,  H04N19/60 ,  H04N19/186 ,  H04N19/33

Abstract: An example device for coding video data includes a memory configured to store the video data and one or more processors implemented in circuitry and communicatively coupled to the memory. The one or more processors are configured to determine whether scaling matrices may be applied to a low-frequency non-separable transform (LFNST) coded block. The one or more processors are also configured to, based on a determination that scaling matrices may not be applied to the LFNST coded block, not applying the scaling matrices to the LFNST coded block. The one or more processors are also configured to code the video data without applying the scaling matrices to the LFNST coded block.

公开(公告)号：US10779006B2

公开(公告)日：2020-09-15

申请号：US16274674

申请日：2019-02-13

Applicant: QUALCOMM Incorporated

Inventor： Fnu Hendry ,  Muhammed Zeyd Coban ,  Geert Van der Auwera ,  Marta Karczewicz

IPC: H04N19/184 ,  H04N19/70 ,  H04N19/136 ,  H04N19/597

Abstract: This disclosure describes techniques for signaling 360-degree video information in syntax structures. As one example, this disclosure describes examples for signaling projection types and related information for 360-degree video in syntax structures that include one or more syntax elements. In some examples, the same syntax structures may include non-360-degree video information as well. Accordingly, the syntax structure may be used for encoding and decoding a bitstream carrying only non-360-degree video data, only 360-degree video data, or both non-360-degree video data and 360-degree video data.

公开(公告)号：US10699389B2

公开(公告)日：2020-06-30

申请号：US15495709

申请日：2017-04-24

Applicant: QUALCOMM Incorporated

Inventor： Geert Van der Auwera ,  Muhammed Coban ,  Marta Karczewicz

IPC: G06T5/00 ,  H04N5/232 ,  G06T3/00

Abstract: In various implementations, computing systems and computer-implemented methods can be used for correcting the distortion present in a fisheye image, and rendering the image for display as 360-degree video. In various implementations, a computing device can receive 2-dimensional video data captured by an omnidirectional camera. The computing device can map an image from each video frame to a 3-dimensional hemispherical representation. In various implementations, this mapping can be executed using a polynomial model. The 3-dimensional hemispherical representation can then be used in a 360-degree video presentation, to provide a virtual reality experience.

公开(公告)号：US20170345136A1

公开(公告)日：2017-11-30

申请号：US15495709

申请日：2017-04-24

Applicant: QUALCOMM Incorporated

Inventor： Geert Van der Auwera ,  Muhammed Coban ,  Marta Karczewicz

IPC: G06T5/00 ,  H04N5/232

Abstract: In various implementations, provided are systems and methods for correcting the distortion present in a fisheye image, and rendering the image for display as 360-degree video. In various implementations, a computing device can receive 2-dimensional video data captured by an omnidirectional camera. The computing device can map an image from each video frame to a 3-dimensional hemispherical representation. In various implementations, this mapping can be executed using a polynomial model. The 3-dimensional hemispherical representation can then be used in a 360-degree video presentation, to provide a virtual reality experience.