公开(公告)号：WO2021061784A1

公开(公告)日：2021-04-01

申请号：PCT/US2020/052234

申请日：2020-09-23

Applicant: QUALCOMM INCORPORATED

Inventor： REUZE, Kevin, Pascal Andre ,  CHEN, Chun-chi ,  HUANG, Han ,  CHIEN, Wei-Jung ,  SEREGIN, Vadim ,  KARCZEWICZ, Marta

IPC: H04N19/119 ,  H04N19/176 ,  H04N19/147 ,  H04N19/503 ,  H04N19/70

Abstract: A video decoder can be configured to determine, for a block of video data encoded in a geometric partition mode, an angle for the block for the geometric partition mode; determine a separation line displacement relative to a center of the block for the geometric partition mode; partition the block into first and second partitions based on the angle and the separation line displacement; determine first predictive samples for the block using a motion vector for the first partition and second predictive samples for the block using a motion vector for the second partition; determine a power-of-2 number based on the angle for the block; determine weighting values based on the power-of-2 number; perform a blending operation on the first predictive samples and the second predictive samples based on the weighting values to determine a prediction block for the block.

公开(公告)号：WO2021061616A1

公开(公告)日：2021-04-01

申请号：PCT/US2020/051948

申请日：2020-09-22

Applicant: QUALCOMM INCORPORATED

Inventor： SEREGIN, Vadim ,  COBAN, Muhammed Zeyd

IPC: H04N19/30 ,  H04N19/463 ,  H04N19/58 ,  H04N19/70

Abstract: An example of encoding video data includes determining a number of actual dependent layers of video data for a current layer, the actual dependent layers being a subset of layers having a layer identification value less than a layer identification value of the current layer, the actual dependent layers being available for inter-layer coding a block in a current picture in the current layer, wherein the number of actual dependent layers is fewer than a number of layers having the layer identification value less than the layer identification value of the current layer, determining a layer, other than the current layer, that includes an inter-layer reference picture for inter-predicting the block in the current picture in the current layer, and signaling information indicative of a layer index value to identify the layer other than the current layer based on the determined number of actual dependent layers for the current layer.

公开(公告)号：WO2021055559A1

公开(公告)日：2021-03-25

申请号：PCT/US2020/051205

申请日：2020-09-17

Applicant: QUALCOMM INCORPORATED

Inventor： CHANG, Yao-Jen ,  SEREGIN, Vadim ,  COBAN, Muhammed Zeyd ,  KARCZEWICZ, Marta

IPC: H04N19/70 ,  H04N19/119 ,  H04N19/167 ,  H04N19/17

Abstract: An example device includes a memory and one or more processors implemented in circuitry and communicatively coupled to the memory. The one or more processors are configured to determine a value of a first syntax element indicative of a number of subpictures in a picture of video data. The one or more processors are configured to determine, for each subpicture among the subpictures in the picture, a value of a respective second syntax element indicative of an identification of a respective subpicture. The one or more processors are also configured to code the respective subpicture identified by the respective second syntax element.

公开(公告)号：WO2021050517A1

公开(公告)日：2021-03-18

申请号：PCT/US2020/049901

申请日：2020-09-09

Applicant: QUALCOMM INCORPORATED

Inventor： CHANG, Yao-Jen ,  COBAN, Muhammed Zeyd ,  SEREGIN, Vadim ,  RAMASUBRAMONIAN, Adarsh Krishnan ,  KARCZEWICZ, Marta

IPC: H04N19/119 ,  H04N19/70 ,  H04N19/96

Abstract: An example device for coding video data codes, in a parameter set, a first syntax element indicative of a luma coding tree block size of coding tree units (CTUs) to which the parameter set is applicable minus 5. The device codes, in the parameter set, a second syntax element indicative of a minimum luma coding block size minus 2 of luma coding blocks to which the parameter set is applicable, wherein a value of the second syntax element is in a range of 0 to a value based on the first syntax element, inclusive. The device codes the luma coding blocks to which the parameter set is applicable in accordance with the first syntax element and the second syntax element in the parameter set.

公开(公告)号：WO2020263916A1

公开(公告)日：2020-12-30

申请号：PCT/US2020/039273

申请日：2020-06-24

Applicant: QUALCOMM INCORPORATED

Inventor： COBAN, Muhammed Zeyd ,  RAMASUBRAMONIAN, Adarsh Krishnan ,  SEREGIN, Vadim ,  KARCZEWICZ, Marta

IPC: H04N19/70 ,  H04N19/46 ,  H04N19/172

Abstract: A method of decoding video data includes decoding, from a coded video bitstream and as an unsigned integer 0-th order Exp-Golomb-coded syntax element with the left bit first, a value that specifies a target recovery point picture for a current picture of a current sequence of pictures, wherein the target recovery point picture is located at or after the current picture in display order; and recovering decoding of the current sequence of pictures at the target recovery point picture.

公开(公告)号：WO2020257570A1

公开(公告)日：2020-12-24

申请号：PCT/US2020/038621

申请日：2020-06-19

Applicant: QUALCOMM INCORPORATED

Inventor： NALCI, Alican ,  EGILMEZ, Hilmi Enes ,  SEREGIN, Vadim ,  COBAN, Muhammed Zeyd ,  KARCZEWICZ, Marta

IPC: H04N19/13 ,  H04N19/186 ,  H04N19/184 ,  H04N19/60

Abstract: An example method includes determining a color component of a unit of video data; determining, based at least on the color component, a context for context-adaptive binary arithmetic coding (CABAC) a syntax element that specifies a value of a low-frequency non-separable transform (LFNST) index for the unit of video data; CABAC decoding, based on the determined context and via a syntax structure for the unit of video data, the syntax element that specifies the value of the LFNST index for the unit of video data; and inverse-transforming, based on a transform indicated by the value of the LFNST index, transform coefficients of the unit of video data.

公开(公告)号：WO2020252154A1

公开(公告)日：2020-12-17

申请号：PCT/US2020/037217

申请日：2020-06-11

Applicant: QUALCOMM INCORPORATED

Inventor： HU, Nan ,  SEREGIN, Vadim ,  EGILMEZ, Hilmi Enes ,  KARCZEWICZ, Marta

IPC: H04N19/70 ,  H04N19/82 ,  H04N19/91

Abstract: A video coder is configured to code an adaptive loop filter (ALF) clipping index as a fixed-length unsigned integer. The video coder may apply, based on the ALF clipping index, an ALF to a block of a picture of the video data.

公开(公告)号：WO2020251801A1

公开(公告)日：2020-12-17

申请号：PCT/US2020/035700

申请日：2020-06-02

Applicant: QUALCOMM INCORPORATED

Inventor： SEREGIN, Vadim ,  RAMASUBRAMONIAN, Adarsh Krishnan ,  COBAN, Muhammed Zeyd ,  KARCZEWICZ, Marta

IPC: H04N19/174 ,  H04N19/187 ,  H04N19/105 ,  H04N19/70

Abstract: Techniques are described for video encoding and decoding with same picture or count numbering for scalability support. One example involves obtaining a portion of a picture (e.g., a slice, a block, or other portion) and determining if weighted prediction is enabled for the portion of the picture. When weighted prediction is enabled, a zero value picture order count offset indicating a reference picture from a reference picture can be used, though different portion of the picture (e.g., different slices of a picture) can have different picture order count offset values. The portion of the picture can then be reconstructed using the reference picture identified by the zero value picture order count offset. Additional embodiments can use weighted prediction flags and different offset value determinations to support scalability or reference pictures in weighted prediction with a different size than the picture being reconstructed.

公开(公告)号：WO2020247715A1

公开(公告)日：2020-12-10

申请号：PCT/US2020/036264

申请日：2020-06-05

Applicant: QUALCOMM INCORPORATED

Inventor： SEREGIN, Vadim ,  COBAN, Muhammed Zeyd ,  RAMASUBRAMONIAN, Adarsh Krishnan

IPC: H04N19/70 ,  H04N19/30

Abstract: A device is configured to obtain a bitstream that comprises an encoded representation of the video data. Additionally, the device is configured to determine that the bitstream does not satisfy a constraint imposed by a video coding standard based on a layer identifier of an applicable Luma Mapping and Chroma Scaling (LMCS) Adaptation Parameter Set (APS) Network Abstraction Layer (NAL) unit not being equal to a layer identifier of the coded slice NAL unit and not being equal to a layer identifier of any layer that is allowed to be used to predict a layer of the coded slice NAL unit. The applicable LMCS APS NAL unit has an APS identifier specified by a LMCS APS identifier syntax element for the coded slice NAL unit.

公开(公告)号：WO2020242883A1

公开(公告)日：2020-12-03

申请号：PCT/US2020/034002

申请日：2020-05-21

Applicant: QUALCOMM INCORPORATED

Inventor： HUANG, Han ,  CHIEN, Wei-Jung ,  SEREGIN, Vadim ,  KARCZEWICZ, Marta

IPC: H04N19/103 ,  H04N19/463 ,  H04N19/70 ,  H04N19/517 ,  H04N19/96 ,  H04N19/157 ,  H04N19/46

Abstract: An example device for coding video data determines for a first block of the video data whether to use a sub-block merge mode. Based on the determination not to use the sub-block merge mode for the first block, the device determines whether to use a merge mode with blending for the first block. Based on the determination to use the merge mode with blending for the first block, the device codes the first block with the merge mode with blending.