公开(公告)号：US11330298B2

公开(公告)日：2022-05-10

申请号：US16855462

申请日：2020-04-22

Applicant: QUALCOMM Incorporated

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

IPC: H04N7/18 ,  H04N19/593 ,  H04N19/169 ,  H04N19/186 ,  H04N19/174

Abstract: This disclosure describes video encoding and video decoding techniques for encoding and decoding video data in a chroma intra prediction mode. The techniques may improve the encoding and decoding process by simplifying aspects of the encoding and decoding process and by reducing a number of binarization tables used for the encoding and decoding. Moreover, reducing the number binarization tables may, in turn, reduce the amount of memory needed in an encoder device or decoder device to perform the video encoding or decoding process.

公开(公告)号：US11310533B2

公开(公告)日：2022-04-19

申请号：US17031238

申请日：2020-09-24

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/70 ,  H04N19/46 ,  H04N19/186 ,  H04N19/176

Abstract: An example method includes decoding, from an encoded video bitstream, a sequence parameter set (SPS) referred to by one or more pictures of video data, wherein decoding the SPS comprises: parsing, at a first position in the SPS, a syntax element that indicates whether joint coding of chroma residuals is enabled or disabled for the one or more pictures of video data referring to the SPS; and parsing, at a second position in the SPS that is after the first position, one or more syntax elements representing a quantization parameter (QP) mapping table.

公开(公告)号：US11310497B2

公开(公告)日：2022-04-19

申请号：US17078710

申请日：2020-10-23

Applicant: QUALCOMM Incorporated

Inventor： Kevin Pascal Andre Reuze ,  Han Huang ,  Chun-Chi Chen ,  Po-Han Lin ,  Wei-Jung Chien ,  Vadim Seregin ,  Marta Karczewicz

IPC: H04N19/119 ,  H04N19/167 ,  G06F1/03 ,  H04N19/176 ,  H04N19/159

Abstract: An example device for decoding video data includes a 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 a first distance index associated with a first geometric partition mode (GEO) angle for a first prediction unit (PU) of the video data to be 4. The one or more processors are configured to determine a first displacement value based on the first distance index, the first displacement value being indicative of a distance from a center of the first PU to a GEO split. The one or more processors are configured to decode the first PU based on the first GEO angle and the first displacement value. The first displacement value is half of a displacement value associated with a distance index of 2.

公开(公告)号：US11303885B2

公开(公告)日：2022-04-12

申请号：US16663193

申请日：2019-10-24

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/105 ,  H04N19/117 ,  H04N19/159 ,  H04N19/172 ,  H04N19/176

Abstract: A device for decoding video data can be configured to determine a size for a block of video data, wherein the block of video data comprises a rectangular, non-square block; determine an intra prediction mode for the block of video data; locate, in a neighboring block of the block of video data, reference samples corresponding to the determined intra prediction mode; in response to the intra prediction mode for the block of video data being a wide-angle intra prediction mode and corresponding to a diagonal direction of the block, filter the reference samples to determine filtered reference samples; generate a predictive block for the block of video data from the filtered reference samples; determine decoded version of the block of video data from the predictive block; and output the decoded version of the block of video data.

公开(公告)号：US20220109816A1

公开(公告)日：2022-04-07

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: H04N13/161 ,  H04N19/50 ,  H04N19/186 ,  H04N19/70

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：US20220108484A1

公开(公告)日：2022-04-07

申请号：US17449003

申请日：2021-09-27

Applicant: QUALCOMM Incorporated

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

IPC: G06T9/00 ,  G06T9/40

Abstract: An example method of encoding a point cloud includes obtaining a value of a secondary residual for geometry coding a current predictive tree node of the point cloud; and encoding the value of the secondary residual, wherein encoding the value comprises: encoding, using a first set of context-adaptive binary arithmetic coding (CABAC) contexts, prefix bins of a syntax element having a value that specifies an absolute value of the value of the secondary residual minus 2; and encoding, using a second set of CABAC contexts that is different than the first set of contexts, suffix bins of the syntax element.

公开(公告)号：US20220103845A1

公开(公告)日：2022-03-31

申请号：US17489459

申请日：2021-09-29

Applicant: QUALCOMM Incorporated

Inventor： Hongtao Wang ,  Jianle Chen ,  Marta Karczewicz

IPC: H04N19/436 ,  H04N19/176 ,  H04N19/117 ,  H04N19/70 ,  H04N19/184 ,  G06N3/04

Abstract: A method of coding video data, the method comprising: reconstructing a block of the video data; and applying a Convolutional Neural Network (CNN)-based filter to the reconstructed block, wherein the CNN-based filter uses a LeakyReLU activation function.

公开(公告)号：US11277641B2

公开(公告)日：2022-03-15

申请号：US17136856

申请日：2020-12-29

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/00 ,  H04N19/625 ,  H04N19/186 ,  H04N19/132 ,  H04N19/176 ,  H04N19/12 ,  H04N19/147

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：US11277611B2

公开(公告)日：2022-03-15

申请号：US16934679

申请日：2020-07-21

Applicant: QUALCOMM Incorporated

Inventor： Yung-Hsuan Chao ,  Wei-Jung Chien ,  Marta Karczewicz

IPC: H04N19/124 ,  H04N19/176 ,  H04N19/96 ,  H04N19/91 ,  H04N19/159

Abstract: A method of decoding video data includes receiving encoded data for a current block of the video data, the current block comprising one or more escape mode encoded samples and decoding, from the encoded data, a value indicating that the current block includes the one or more escape mode encoded samples. The method further includes, in response to determining that the value indicates that the current block includes the one or more escape mode encoded samples and that a current tree type for the current block is not dual tree chroma, decoding an absolute value for a luma delta quantization parameter for the current block and a sign for the luma delta quantization parameter. The method further includes reconstructing the current block based on the absolute value for the luma delta quantization parameter for the current block and the sign for the luma delta quantization parameter.

公开(公告)号：US11259052B2

公开(公告)日：2022-02-22

申请号：US16511927

申请日：2019-07-15

Applicant: QUALCOMM Incorporated

Inventor： Yung-Hsuan Chao ,  Amir Said ,  Hilmi Enes Egilmez ,  Vadim Seregin ,  Marta Karczewicz

IPC: H04N19/625 ,  H04N19/61 ,  H04N19/20

Abstract: This disclosure describes examples of extending the number of available discrete cosine transform (DCT) and discrete sine transform (DST) for encoding and decoding. A video coder may determine one or more transforms or inverse transforms to apply from a set of transforms or inverse transforms that includes DCT-2 or inverse DCT-2, DST-7 or inverse DST-7, DST-8 or inverse DST-8, DCT-3 or inverse DCT-3, DST-2 or inverse DST-2, DST-3 or inverse DST-3, DCT-4 or inverse DCT-4, DST-4 or inverse DST-4, DST-5 or inverse DST-5, DST-6 or inverse DST-6, and identity transform an inverse identity transform (IDT).