公开(公告)号：US10129558B2

公开(公告)日：2018-11-13

申请号：US15269497

申请日：2016-09-19

Applicant: QUALCOMM Incorporated

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

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

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 Supplemental Enhancement Information (SEI) Messages 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：US20180255324A1

公开(公告)日：2018-09-06

申请号：US15971373

申请日：2018-05-04

Applicant: QUALCOMM Incorporated

Inventor： Fnu Hendry ,  Ye-Kui Wang ,  Adarsh Krishnan Ramasubramonian

IPC: H04N19/70 ,  H04L29/06 ,  H04N19/423 ,  H04N19/30 ,  H04N19/44 ,  H04N21/2343 ,  H04N21/24

CPC classification number: H04N19/70 ,  H04L65/4069 ,  H04N19/30 ,  H04N19/423 ,  H04N19/44 ,  H04N21/234327 ,  H04N21/2401

Abstract: A video processing device obtains a data stream comprising a plurality of elementary streams and a High Efficiency Video Coding (HEVC) timing and Hypothetical Reference Decoder (HRD) descriptor. The HEVC timing and HRD descriptor comprises a target schedule index syntax element indicating an index of a delivery schedule. The video processing device may identify, based on a set of parameters, a syntax element in an array of syntax elements in a video parameter set (VPS). The set of parameters may comprise a parameter having a value equal to a value of the target schedule index syntax element. The video processing device may identify, based on an index specified by the identified syntax element, a particular HRD parameters syntax structure in a plurality of HRD parameters syntax structures as being applicable to a particular elementary stream.

公开(公告)号：US10003815B2

公开(公告)日：2018-06-19

申请号：US14293829

申请日：2014-06-02

Applicant: QUALCOMM Incorporated

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

IPC: H04N7/12 ,  H04N19/46 ,  H04N19/597 ,  H04N19/70 ,  H04N19/30 ,  H04N19/573 ,  H04N19/58

Abstract: A device may determine, based on a value, whether all cross-layer random access skipped (CL-RAS) pictures of an intra random access point (IRAP) access unit are present in a video data bitstream. In addition, the device may reconstruct pictures of the video data based at least in part on syntax elements decoded from the video data bitstream.

公开(公告)号：US20180160132A1

公开(公告)日：2018-06-07

申请号：US15884275

申请日：2018-01-30

Applicant: QUALCOMM Incorporated

Inventor： Fnu Hendry ,  Adarsh Krishnan Ramasubramonian ,  Ye-kui Wang

IPC: H04N19/187 ,  H04N19/70 ,  H04N19/597 ,  H04N19/52 ,  H04N19/51 ,  H04N19/50 ,  H04N19/105 ,  H04N19/30 ,  H04N19/176 ,  H04N19/172 ,  H04N19/124 ,  H04N19/31

CPC classification number: H04N19/187 ,  H04N19/105 ,  H04N19/124 ,  H04N19/172 ,  H04N19/176 ,  H04N19/30 ,  H04N19/31 ,  H04N19/50 ,  H04N19/51 ,  H04N19/52 ,  H04N19/597 ,  H04N19/70

Abstract: An apparatus for coding video information according to certain aspects includes a memory and a processor configured to: determine a value of a first flag indicative of whether preceding pictures that precede a current picture in a current layer in decoding order are used for temporal motion vector prediction (TMVP) of subsequent pictures that follow the current picture in the current layer in decoding order, the first flag associated with the current picture; and refrain from using the preceding pictures in the current layer as reference pictures for TMVP of the current picture, in response to determining that the value of the first flag indicates that the preceding pictures in the current layer should not be used for TMVP of the subsequent pictures in the current layer.

公开(公告)号：US20180070107A1

公开(公告)日：2018-03-08

申请号：US15693146

申请日：2017-08-31

Applicant: QUALCOMM Incorporated

Inventor： Adarsh Krishnan Ramasubramonian ,  Dmytro Rusanovskyy ,  Joel Sole Rojals ,  Done Bugdayci Sansli

IPC: H04N19/70 ,  H04N19/186 ,  H04N19/156 ,  H04N19/196

CPC classification number: H04N19/70 ,  H04N19/103 ,  H04N19/156 ,  H04N19/159 ,  H04N19/186 ,  H04N19/196

Abstract: This disclosure describes techniques for communicating optimal coding parameters between a source device and a sink device. The sink device may receive, in a bitstream, video data and a group of one or more supplemental enhancement information (SEI) messages, wherein each SEI message comprises indications of a set of display capabilities and a set of remapping parameters. The sink device may then, for each SEI message of the group of one or more SEI messages, compare the respective set of display capabilities indicated in the respective SEI message with a target set of display capabilities for the sink device. Responsive to determining that a first set of display capabilities indicated by a first SEI message is compatible with the target set of display capabilities, the sink device may adapt the video data using a respective set of remapping parameters indicated by the first SEI message.

公开(公告)号：US09900605B2

公开(公告)日：2018-02-20

申请号：US14513034

申请日：2014-10-13

Applicant: QUALCOMM Incorporated

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

IPC: H04N7/12 ,  H04N11/02 ,  H04N11/04 ,  H04N19/187 ,  H04N19/30 ,  H04N19/46 ,  H04N19/70 ,  H04N19/80 ,  H04N19/68 ,  H04N19/86

CPC classification number: H04N19/187 ,  H04N19/30 ,  H04N19/46 ,  H04N19/68 ,  H04N19/70 ,  H04N19/80 ,  H04N19/86

Abstract: An apparatus configured to code video information includes a memory unit and a processor in communication with the memory unit. The memory unit is configured to store video information associated with a video layer having a picture. The processor is configured to determine whether the picture is a non-picture-order-count (POC)-anchor picture, and based on the determination of whether the picture is a non-POC-anchor picture, perform one of (1) refraining from indicating a POC reset in connection with the picture, or (2) indicating the POC reset in connection with the picture. The processor may encode or decode the video information.

公开(公告)号：US20170332085A1

公开(公告)日：2017-11-16

申请号：US15588516

申请日：2017-05-05

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/167 ,  H04N19/70 ,  H04N19/172

CPC classification number: H04N19/167 ,  H04N19/172 ,  H04N19/70 ,  H04N19/80 ,  H04N19/85

Abstract: Systems, methods, and computer readable media are described for generating a regional nesting message. In some examples, a video bitstream is obtained and an encoded video bitstream is generated using the video data. The encoded video bitstream includes a regional nesting message that contains a plurality of nested messages and region data defining at least a first region of a picture of the encoded video bitstream. For example, a first nested message of the regional nesting message includes a first set of data and a first region identifier indicating the first region of the picture is associated with the first set of data.

公开(公告)号：US09794579B2

公开(公告)日：2017-10-17

申请号：US14330836

申请日：2014-07-14

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/29 ,  H04N19/30 ,  H04N19/597 ,  H04N19/70 ,  H04N19/423

CPC classification number: H04N19/29 ,  H04N19/30 ,  H04N19/423 ,  H04N19/597 ,  H04N19/70

Abstract: A method of decoding video data comprising partitioning a decoded picture buffer (DPB) into a plurality of sub-DPBs, receiving at least one indication of a sub-DPB size for the plurality of sub-DPBs for one or more operation points of a multi-layer video coding process, and allocating memory space for the plurality of sub-DPBs based on the at least one indication.

公开(公告)号：US09712843B2

公开(公告)日：2017-07-18

申请号：US14521153

申请日：2014-10-22

Applicant: QUALCOMM Incorporated

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

IPC: H04N5/76 ,  H04N19/597 ,  H04N19/46 ,  H04N19/136 ,  H04N5/91 ,  H04N19/70 ,  H04N19/30 ,  H04N19/573 ,  H04N19/58 ,  H04N19/59 ,  H04N21/845 ,  H04N21/854 ,  H04N19/52 ,  H04N19/91

CPC classification number: H04N19/597 ,  H04N5/91 ,  H04N19/136 ,  H04N19/30 ,  H04N19/46 ,  H04N19/52 ,  H04N19/573 ,  H04N19/58 ,  H04N19/59 ,  H04N19/70 ,  H04N19/91 ,  H04N21/8453 ,  H04N21/85406

Abstract: A computing device generates a file that comprises a media data box that encloses media content. The media content comprises a sequence of samples. Each of the samples is an access unit of multi-layer video data. Responsive to a determination that at least one access unit of a bitstream of the multi-layer video data includes a coded picture that has a picture output flag equal to a first value and a coded picture that has a picture output flag equal to a second value, the computing device uses at least two tracks to store the bitstream in the file. For each respective track from the at least two tracks, all coded pictures in each sample of the respective track have the same value of the picture output flag.

公开(公告)号：US20170195679A1

公开(公告)日：2017-07-06

申请号：US15465271

申请日：2017-03-21

Applicant: QUALCOMM Incorporated

Inventor： Krishnakanth Rapaka ,  Ye-Kui Wang ,  Adarsh Krishnan Ramasubramonian ,  Jianle Chen

IPC: H04N19/36 ,  H04N19/105 ,  H04N19/70

CPC classification number: H04N19/36 ,  H04N19/105 ,  H04N19/172 ,  H04N19/176 ,  H04N19/184 ,  H04N19/30 ,  H04N19/436 ,  H04N19/597 ,  H04N19/70 ,  H04N19/96

Abstract: Bitstream restrictions or constraints on the partitioning of pictures across layers of video data are described. In some examples, the number of tiles per picture for each layer of a plurality of layers is constrained based on a maximum number of tiles per picture for the layer. In some examples, the number of tiles per picture for each layer of the plurality of layers is no greater than the maximum number of tiles per picture for the layer. In some examples, a sum of the numbers of tiles per picture for the plurality of layers is no greater than a sum of the maximum numbers of tiles per picture for the plurality of layers. In some examples, a second largest coding unit (LCU) or coding tree block (CTB) size for a second layer is constrained based on, e.g., to be equal to, a first LCU size for a first layer.