公开(公告)号：US11128878B2

公开(公告)日：2021-09-21

申请号：US16284886

申请日：2019-02-25

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/44 ,  H04N19/132 ,  H04N19/184 ,  H04N19/46 ,  H04N19/80 ,  H04N19/85 ,  H04N19/36 ,  H04N19/117 ,  H04N19/154 ,  H04N19/187

Abstract: Processing high dynamic range and or wide color gamut video data using a fixed-point implementation. A method of processing video data may include receiving one or more supplemental enhancement information (SEI) messages that contain information specifying how to determine parameters for performing an inverse dynamic range adjustment process, receiving decoded video data, and performing the inverse dynamic range adjustment process on the decoded video data using fixed-point computing in accordance with the information in the one or more SEI messages.

公开(公告)号：US20210195175A1

公开(公告)日：2021-06-24

申请号：US17128767

申请日：2020-12-21

Applicant: QUALCOMM Incorporated

Inventor： Vadim Seregin ,  Adarsh Krishnan Ramasubramonian ,  Muhammed Zeyd Coban

IPC: H04N19/105 ,  H04N19/44 ,  H04N19/30 ,  H04N19/139 ,  H04N19/172

Abstract: A video decoder for decoding multi-layer video data can be configured to maintain a decoded picture buffer (DPB) for storing reference pictures for a plurality of layers, wherein the plurality of layers comprise at least a first layer and a second layer; prior to decoding a current picture of an access unit of the first layer, perform a picture output and removal process on the DPB, wherein to perform the picture output and removal process on the DPB, the one or more processors are further configured to remove from the DPB only decoded pictures that belong to the first layer; and after removing a last decoding unit of the current picture from a coded picture buffer (CPB), perform a picture bumping process across all layers of the DPB.

公开(公告)号：US20210099732A1

公开(公告)日：2021-04-01

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：US20210058622A1

公开(公告)日：2021-02-25

申请号：US16998665

申请日：2020-08-20

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/132 ,  H04N19/117 ,  H04N19/105 ,  H04N19/119 ,  H04N19/186 ,  H04N19/176

Abstract: A method of decoding video data includes generating a prediction block for a current block of the video data and decoding a residual block for the current block of the video data. The method includes combining the prediction block and the residual block to generate a reconstructed block of the video data and determining a variable M×N sample pattern based on a block size of the current block. The method includes estimating a local luma level for samples of the reconstructed block using the variable M×N sample pattern and applying, based on the estimated local luma level, a deblocking filter to the samples of the reconstructed block to generate filtered samples. The method includes generating final samples of the video data based on the filtered samples.

公开(公告)号：US20210044828A1

公开(公告)日：2021-02-11

申请号：US16947489

申请日：2020-08-04

Applicant: QUALCOMM Incorporated

Inventor： Luong Pham Van ,  Han Huang ,  Geert Van der Auwera ,  Adarsh Krishnan Ramasubramonian ,  Cheng-Teh Hsieh ,  Wei-Jung Chien ,  Vadim Seregin ,  Marta Karczewicz

IPC: H04N19/593 ,  H04N19/176 ,  H04N19/186 ,  H04N19/96

Abstract: A video decoder can be configured to determine that a block of the video data is formatted in accordance with a 4:4:4 video coding format; determine that the block of the video data is encoded in an intra prediction mode; determine that a smallest chroma intra prediction unit (SCIPU) is disabled for the block in response to determining that the block has the 4:4:4 video coding format; decode the block of the video data based on the determination that the SCIPU is disabled; and output decoded video data comprising a decoded version of the block.

公开(公告)号：US20200288159A1

公开(公告)日：2020-09-10

申请号：US16810680

申请日：2020-03-05

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/44 ,  H04N19/186 ,  H04N19/176 ,  H04N19/159

Abstract: A video decoder may apply a first inverse residual modification function to first decoded modified chroma residual data to generate first inverse modified chroma residual data. Additionally, the video decoder may apply a second inverse residual modification function to second decoded modified chroma residual data to generate second inverse modified chroma residual data. The first decoded modified chroma residual data is associated with a first chroma component and the second decoded modified chroma residual data is associated with a second chroma component. The video decoder may reconstruct a block of video data based on the first inverse modified chroma residual data and the second inverse modified chroma residual data.

公开(公告)号：US10757385B2

公开(公告)日：2020-08-25

申请号：US15684732

申请日：2017-08-23

Applicant: QUALCOMM Incorporated

Inventor： Dmytro Rusanovskyy ,  Adarsh Krishnan Ramasubramonian

IPC: H04N7/12 ,  H04N11/02 ,  H04N11/04 ,  H04N9/67 ,  H04N21/81 ,  H04N21/485 ,  H04N21/41 ,  H04N21/4402 ,  H04N21/4363 ,  H04N21/658 ,  G09G5/00 ,  G09G5/04 ,  G09G5/02 ,  H04N5/235 ,  H04N19/117 ,  H04N19/124 ,  H04N19/176 ,  H04N19/44 ,  G09G3/20

Abstract: In general, this disclosure describes techniques for communicating preferred color gamut settings from a sink device to a source device. The source device may send, through a video interface, first video data to the sink device, which receives the first video data through the video interface. The sink device may then send, through a feedback channel of the video interface, preferred color gamut settings of the sink device to the source device. The preferred color gamut settings may be for content received from the source device. The source device may adapt second video data using the preferred color gamut settings. The source device may then send, through the video interface, the second video data adapted to the preferred color gamut settings to the sink device.

公开(公告)号：US20200221099A1

公开(公告)日：2020-07-09

申请号：US16718594

申请日：2019-12-18

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/159 ,  H04N19/105 ,  H04N19/119 ,  H04N19/70 ,  H04N19/176

Abstract: A video coder is configured to determine a split type of a block of video data from an intra prediction mode associated with a neighboring block. The video coder may determine an intra prediction mode associated with a neighboring block of the current block of video data, determine a split type of the current block of video data based on the intra prediction mode associated with the neighboring block, split the current block of video data into a plurality of sub-partitions based on the determined split type, and code the plurality of sub-partitions.

公开(公告)号：US10536695B2

公开(公告)日：2020-01-14

申请号：US15260148

申请日：2016-09-08

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/186 ,  H04N19/124

Abstract: In an example, a method of processing video may include receiving a bitstream including encoded video data and a colour remapping information (CRI) supplemental enhancement information (SEI) message. The CRI SEI message may include information corresponding to one or more colour remapping processes. The method may include decoding the encoded video data to generate decoded video data. The method may include applying a process that does not correspond to the CRI SEI message to the decoded video data before applying at least one of the one or more colour remapping processes to the decoded video data to produce processed decoded video data.

公开(公告)号：US20190335184A1

公开(公告)日：2019-10-31

申请号：US16506723

申请日：2019-07-09

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/186 ,  H04N1/60 ,  G06T5/00 ,  H04N19/124 ,  H04N19/85 ,  H04N19/132

Abstract: In general, techniques are described for processing high dynamic range (HDR) and wide color gamut (WCG) video data for video coding. A device comprising a memory and a processor may perform the techniques. The memory may store compacted fractional chromaticity coordinate (FCC) formatted video data. The processor may inverse compact the compacted FCC formatted video data using one or more inverse adaptive transfer functions (TFs) to obtain decompacted FCC formatted video data. The processor may next inverse adjust a chromaticity component of the decompacted FCC formatted video data based on a corresponding luminance component of the decompacted FCC formatted video data to obtain inverse adjusted FCC formatted video data. The processor may convert the chromaticity component of the inverse adjusted FCC formatted video data from the FCC format to a color representation format to obtain High Dynamic Range (HDR) and Wide Color Gamut (WCG) video data.