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：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：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：US11212438B2

公开(公告)日：2021-12-28

申请号：US16270275

申请日：2019-02-07

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/597 ,  H04N19/82 ,  H04N19/503 ,  H04N19/86 ,  H04N5/232 ,  H04N19/46 ,  H04N19/167 ,  H04N19/33

Abstract: An example method includes, receiving an encoded picture of 360-degree video data, the encoded picture of 360-degree video data being arranged in packed faces obtained from a projection of a sphere of the 360-degree video data; decoding the picture of encoded 360-degree video data to obtain a reconstructed picture of 360-degree video data, the reconstructed picture of 360-degree video data being arranged in the packed faces; padding the reconstructed picture of 360-degree video data to generate a padded reconstructed picture of 360-degree video data; in-loop filtering the padded reconstructed picture of 360-degree video data to generate a padded and filtered reconstructed picture of 360-degree video data; and storing the padded and filtered reconstructed picture of 360-degree video data in a reference picture memory for use in predicting subsequent pictures of 360-degree video data.

公开(公告)号：US11159806B2

公开(公告)日：2021-10-26

申请号：US16434113

申请日：2019-06-06

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/174 ,  H04N19/11 ,  H04N19/176 ,  H04N19/61 ,  H04N19/70

Abstract: Techniques are described using Position Dependent Intra Prediction Combination (PDPC) and multiple reference lines. For example, a video coder (e.g., an encoder and/or decoder) can predict an initial prediction sample value for a sample of a current block using an intra-prediction mode. The initial prediction sample value can be predicted from a first neighboring block and/or a second neighboring block of the current block. One or more reference sample values can be determined from at least one line of multiple lines of reference samples from the first neighboring block and/or the second neighboring block. At least one of the lines from the multiple lines used for determining the reference sample value(s) is not adjacent to the current block. A final prediction sample value can be determined for the sample of the current block, such as by modifying the initial prediction sample value using the one or more reference sample values.

公开(公告)号：US11115658B2

公开(公告)日：2021-09-07

申请号：US16893974

申请日：2020-06-05

Applicant: QUALCOMM Incorporated

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

IPC: H04N7/18 ,  H04N19/11 ,  H04N19/59 ,  H04N19/176 ,  H04N19/70 ,  H04N19/159 ,  H04N19/105 ,  H04N19/132 ,  H04N19/186 ,  H04N19/91 ,  H04N19/167 ,  H04N19/61 ,  H04N19/23 ,  H04N19/136 ,  G06T3/40 ,  G06T7/50

Abstract: A method of decoding video data includes predicting luma samples for a block of the video data using matrix intra prediction (MIP), where using MIP comprises down-sampling a set of luma neighboring samples to generate down-sampled luma neighboring samples. The method further includes predicting chroma samples for the block using cross-component linear model (CCLM) prediction, where using CCLM prediction comprises predicting the chroma samples for the block based on the down-sampled luma neighboring samples generated from the MIP. The method further includes determining a prediction block for the block based on the luma samples and the chroma samples, decoding a residual block for the block, and combining the prediction block and the residual block to decode the block.

公开(公告)号：US11057622B2

公开(公告)日：2021-07-06

申请号：US16714432

申请日：2019-12-13

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/11 ,  H04N19/176

Abstract: A video decoder configured to determine a block of video data is intra predicted using an angular intra prediction mode, wherein the angular intra prediction mode is one of a bottom-left intra prediction mode or a top-right intra prediction mode; determine an aspect ratio of the block; locate one or more reference samples corresponding to the angular intra prediction mode; apply position dependent intra prediction combination to the reference samples to determine modified reference samples based on the aspect ratio of the block; and generate a predictive block for the block based on the modified reference samples.