公开(公告)号：US20210314616A1

公开(公告)日：2021-10-07

申请号：US17223780

申请日：2021-04-06

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/61 ,  H04N19/44 ,  H04N13/161

Abstract: A method for decoding point cloud data comprises, based on a comparison of a maximum difference value and a threshold, applying an inverse function to a set of one or more jointly coded values to recover (i) residual values for attribute values of a current point of point cloud data and (ii) a predictor index that indicates a predictor in a predictor list, wherein predictors in the predictor list are based on attribute values of one or more neighbor points; determining predicted attribute values based on the predictor index; and reconstructing the attribute values of the current point based on the residual values and the predicted attribute values.

公开(公告)号：US20210281843A1

公开(公告)日：2021-09-09

申请号：US17191413

申请日：2021-03-03

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/124 ,  H04N19/70 ,  H04N19/176 ,  H04N19/103 ,  H04N19/18 ,  H04N19/136 ,  H04N19/186 ,  H04N19/30

Abstract: A video decoder can be configured to determine that a new scaling list for a set of scaling lists is to be predicted from a reference scaling list, wherein the new scaling list corresponds to a new scaling matrix; receive a syntax element that identifies an ID number corresponding to a scaling list of the set of scaling lists that is to be used as the reference scaling list; determine that the set of scaling lists does not include a scaling list with the ID number; and in response to determining that the set of scaling lists does not include the scaling list with the ID number, determine the new scaling matrix based on a set of default values.

公开(公告)号：US20210211734A1

公开(公告)日：2021-07-08

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 ,  H04N19/30 ,  H04N19/174 ,  H04N19/597

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：US20210209811A1

公开(公告)日：2021-07-08

申请号：US17143696

申请日：2021-01-07

Applicant: QUALCOMM Incorporated

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

IPC: G06T9/40 ,  G06T7/73

Abstract: A method of decoding a point cloud comprises: reconstructing a position of a point of the point cloud; determining a quantized attribute value for the point; deriving a quantization parameter (QP) bit depth offset for the point; deriving a QP range for the point based on the QP bit depth offset for the point; determining a quantization step size for the point based on the QP range for the point; and inverse quantizing the quantized attribute value for the point based on the quantization step size for the point.

公开(公告)号：US20210195248A1

公开(公告)日：2021-06-24

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: H04N19/70 ,  H04N19/172 ,  H04N19/184 ,  H04N19/169 ,  H04N19/174

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：US10812820B2

公开(公告)日：2020-10-20

申请号：US15826549

申请日：2017-11-29

Applicant: QUALCOMM Incorporated

Inventor： Dmytro Rusanovskyy ,  Adarsh Krishnan Ramasubramonian ,  Joel Sole Rojals

IPC: H04N19/50 ,  H04N1/64 ,  H04N19/17 ,  H04N19/70 ,  H04N19/176 ,  H04N19/18 ,  H04N19/186 ,  H04N19/12 ,  H04N19/136 ,  H04N19/46 ,  H04N21/431 ,  H04N5/445 ,  H04N19/39 ,  H04N19/52

Abstract: Provided are methods, apparatus, and computer-readable medium for processing video data by a video coding system that implements ST 2094-10. Video data can include at least two video signals, which can be displayed at the same time in different display regions of a video frame. In various implementations, various techniques can be used to determine an association between a set of color volume parameters and a video signal, and this association can be encoded into a bitstream. Upon decoding of the bitstream, the set of color volume parameters associated with a particular video signal can be used to compress the color volume of the video signal into a range that can be displayed by a particular display device.

公开(公告)号：US20200260091A1

公开(公告)日：2020-08-13

申请号：US16781751

申请日：2020-02-04

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/169

Abstract: An example device for coding (encoding or decoding) video data includes a memory for storing video data and one or more processors implemented in circuitry and configured to form an inter-prediction block for a current chrominance block of the video data; form an intra-prediction block for the current chrominance block of the video data; determine a number of neighboring blocks to a luminance block corresponding to the current chrominance block that are intra-prediction coded; determine a first weight and a second weight according to the number of neighboring blocks that are intra-prediction coded; apply the first weight to the inter-prediction block and the second weight to the intra-prediction block; combine the first weighted inter-prediction block and the second weighted intra-prediction block to form a prediction block for the current chrominance block; and code the current chrominance block using the prediction block.

公开(公告)号：US20200162728A1

公开(公告)日：2020-05-21

申请号：US16684440

申请日：2019-11-14

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/105 ,  H04N19/159 ,  H04N19/132 ,  H04N19/423 ,  H04N19/136 ,  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: determine a first number of neighboring blocks to a current block of the video data that are intra-predicted; determine a second number of the neighboring blocks that are inter-predicted; determine a first weight value to be applied to intra-prediction samples of an intra-prediction block for the current block; determine a second weight value to be applied to inter-prediction samples of an inter-prediction block for the current block; generate a prediction block for the current block as a weighted combination of the intra-prediction block to which the first weight value is applied and the inter-prediction block to which the second weight value is applied; and code the current block using the prediction block.

公开(公告)号：US10595032B2

公开(公告)日：2020-03-17

申请号：US16103622

申请日：2018-08-14

Applicant: QUALCOMM Incorporated

Inventor： Adarsh Krishnan Ramasubramonian ,  Dmytro Rusanovskyy ,  Joel Sole Rojals ,  Sungwon Lee ,  Done Bugdayci Sansli ,  Marta Karczewicz

IPC: H04N19/117 ,  H04N19/124 ,  H04N19/154 ,  H04N19/174 ,  H04N19/184 ,  H04N19/186 ,  H04N19/36 ,  H04N19/44 ,  H04N19/463 ,  H04N19/60 ,  H04N19/66 ,  H04N19/70 ,  H04N19/80 ,  H04N19/85 ,  H04N19/46

Abstract: This disclosure relates to processing video data, including processing video data that is represented by an HDR/WCG color representation. In accordance with one or more aspects of the present disclosure, one or more syntax structures may be used to signal syntax elements and or other information that allow a video decoder or video postprocessing device to reverse the dynamic range adjustment (DRA) techniques of this disclosure to reconstruct the original or native color representation of the video data. Dynamic range adjustment (DRA) parameters may be applied to video data in accordance with one or more aspects of this disclosure in order to make better use of an HDR/WCG color representation, and may include the use of global offset values, as well as local scale and offset values for partitions of color component values.

公开(公告)号：US10595031B2

公开(公告)日：2020-03-17

申请号：US14328406

申请日：2014-07-10

Applicant: QUALCOMM Incorporated

Inventor： Ying Chen ,  Adarsh Krishnan Ramasubramonian ,  Ye-Kui Wang

IPC: H04N19/46 ,  H04N19/30 ,  H04N19/44 ,  H04N19/597

Abstract: A method, apparatus, and manufacture for processing video data. A list of output layer sets in a video bitstream is received, and an index to at least one target output layer set in the list of output layer sets is received. Next, target output layers in the at least one target output layer set is determined based on the index. At least the target output layers from the video bitstream are decoded. Then, the decoded target output layers are output without outputting layers that are not targeted for output.