公开(公告)号：US10368099B2

公开(公告)日：2019-07-30

申请号：US15670832

申请日：2017-08-07

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/30 ,  H04N19/597 ,  H04N19/52 ,  H04N19/70 ,  H04N19/46 ,  H04N19/186 ,  H04N19/85

Abstract: In one example, a method includes determining, by a video decoding unit, a peak brightness value of a current display; obtaining, by the video decoding unit and for a picture of video data, one or more color remapping messages that each correspond to a respective peak brightness value of a set of peak brightness values; selecting, by the video decoding unit and based on the peak brightness value of the current display, a color remapping message of the one or more color remapping messages; color remapping, by the video decoding unit and based on the selected color remapping message, samples of the picture of video data; and outputting, by the video decoding unit and for display at the current display, the color remapped samples of the picture of video data.

公开(公告)号：US10334277B2

公开(公告)日：2019-06-25

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 ,  H04N19/196 ,  H04N19/156 ,  H04N19/186 ,  H04N19/103 ,  H04N19/159

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：US10284863B2

公开(公告)日：2019-05-07

申请号：US15175570

申请日：2016-06-07

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/187 ,  H04N19/64 ,  H04N19/182 ,  H04N19/176 ,  H04N19/132 ,  H04N19/136 ,  H04N1/64 ,  H04N9/68 ,  H04N19/46 ,  H04N19/12 ,  H04N19/186 ,  H04N5/20

Abstract: A device may determine, based on data in a bitstream, a luma sample (Y) of a pixel, a Cb sample of the pixel, and the Cr sample of the pixel. Furthermore, the device may obtain, from the bitstream, a first scaling factor and a second scaling factor. Additionally, the device may determine, based on the first scaling factor, the Cb sample for the pixel, and Y, a converted B sample (B′) for the pixel. The device may determine, based on the second scaling factor, the Cr sample for the pixel, and Y, a converted R sample (R′) for the pixel. The device may apply an electro-optical transfer function (EOTF) to convert Y′, R′, and B′ to a luminance sample for the pixel, a R sample for the pixel, and a B sample for the pixel, respectively.

公开(公告)号：US10264272B2

公开(公告)日：2019-04-16

申请号：US14514153

申请日：2014-10-14

Applicant: QUALCOMM Incorporated

Inventor： Vadim Seregin ,  Adarsh Krishnan Ramasubramonian ,  Ye-Kui Wang

IPC: H04N19/33 ,  H04N19/46 ,  H04N19/174 ,  H04N19/597 ,  H04N19/70 ,  H04N19/30

Abstract: An apparatus may include a memory configured to store video data associated with a reference layer (RL) and an enhancement layer (EL) and a processor in communication with the memory. The processor may determine whether a first enhancement layer (EL) picture associated with a first parameter set is an intra random access point (IRAP) picture, determine whether a first access unit including the EL picture immediately follows a splice point, and perform one of (1) refraining from associating the first EL picture with a second parameter set different from the first parameter set, or (2) associating the first EL picture with a second parameter set different from the first parameter set. The processor may encode or decode the video data.

公开(公告)号：US20190098301A1

公开(公告)日：2019-03-28

申请号：US16141714

申请日：2018-09-25

Applicant: QUALCOMM Incorporated

Inventor： Sungwon Lee ,  Wei-Jung Chien ,  Adarsh Krishnan Ramasubramonian ,  Muhammed Zeyd Coban ,  Jianle Chen ,  Yi-Wen Chen ,  Marta Karczewicz

IPC: H04N19/114 ,  H04N19/159 ,  H04N19/70

Abstract: A device for encoding video data includes a memory configured to store video data, and a video encoder implemented in circuitry and configured to encode a future picture of the video data having a first display order position, the future picture being included in an intra period (IP) of the video data, the IP comprising a plurality of groups of pictures (GOPs), and after encoding the future picture, encode a picture of an ordinal first GOP of the plurality of GOPs using the future picture as a reference picture, each picture of the ordinal first GOP having display order positions earlier than the first display order position. Encoding the future picture in this manner may result in encoding performance improvements with minimal increases in encoding and decoding complexity.

公开(公告)号：US20190068969A1

公开(公告)日：2019-02-28

申请号：US15999393

申请日：2018-08-20

Applicant: QUALCOMM Incorporated

Inventor： Dmytro Rusanovskyy ,  Adarsh Krishnan Ramasubramonian ,  Marta Karczewicz

IPC: H04N19/124 ,  H04N19/186 ,  H04N19/169

Abstract: A method of processing video data including receiving video data, determining luma scale parameters for each of a plurality of ranges of codeword values for luminance components of the video data, performing a dynamic range adjustment process on the luminance components using the luma scale parameters, determining chroma scale parameters for chrominance components of the video data using a function of the luma scale parameters, and performing a dynamic range adjustment process on the chrominance components of the video data using the chroma scale parameters.

公开(公告)号：US10178397B2

公开(公告)日：2019-01-08

申请号：US14665923

申请日：2015-03-23

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/13 ,  H04N19/166 ,  H04N19/187 ,  H04N19/154 ,  H04N19/91 ,  H04N19/37 ,  H04N19/88 ,  H04N19/60 ,  H04N19/70 ,  H04N19/89 ,  H04N19/30

Abstract: In an example, a method of coding video data includes coding one or more non-video coding layer (VCL) network abstraction layer (NAL) units of a layer of a multi-layer bitstream, where the one or more non-VCL NAL units contain a decoded picture hash SEI message. The method also includes determining a set of layers of the multi-layer bitstream to which the decoded picture hash SEI message is applicable based on a layer identifier of the one or more non-VCL NAL units containing the decoded picture hash SEI message.

公开(公告)号：US10136152B2

公开(公告)日：2018-11-20

申请号：US14664699

申请日：2015-03-20

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/46 ,  H04N19/187 ,  H04N19/172 ,  H04N19/597 ,  H04N19/52 ,  H04N19/65 ,  H04N19/895 ,  H04N19/159 ,  H04N19/70 ,  H04N19/30 ,  H04N19/196 ,  H04N19/61 ,  H04N19/107 ,  H04N19/132 ,  H04N19/167

Abstract: Devices and methods for improving use of supplemental enhancement information (SEI) messages in multi-layer codecs for decoding multi-layer bitstreams containing video information are disclosed. In one aspect, a device may include a memory that stores video information associated with the multi-layer bitstream. The stored video information may include an SEI message and a processor connected to the memory. The processor determines whether the SEI message belongs to a first SEI message category or a second SEI message category based on an identifier in the SEI message. The processor further determines whether the SEI message applies to the operation points or the layers and, in response to the SEI message being of the first SEI message category and applying to the operation points, associates each semantic of the SEI message with each operation point among the operation points.

公开(公告)号：US10091532B2

公开(公告)日：2018-10-02

申请号：US14749533

申请日：2015-06-24

Applicant: QUALCOMM Incorporated

Inventor： Adarsh Krishnan Ramasubramonian ,  Ye-Kui Wang

IPC: H04B1/66 ,  H04N7/12 ,  H04N11/02 ,  H04N11/04 ,  H04N19/70 ,  H04N19/30 ,  H04N19/597 ,  H04N19/50

Abstract: An apparatus configured to code video information in a bitstream includes a memory and a processor in communication with the memory. The memory is configured to store video information associated with a first layer including a first picture and a second layer including a second picture, the first picture associated with a current access unit (AU). The processor is configured to determine whether the current AU satisfies a first condition associated with the first layer, and based on a determination that the current AU does not satisfy the first condition associated with the first layer, determine whether a difference between a highest picture order count (POC) and a lowest POC of a plurality of pictures in a decoded picture buffer (DPB) is less than a threshold value. The processor may encode or decode the video information in the bitstream.

公开(公告)号：US09930340B2

公开(公告)日：2018-03-27

申请号：US14742435

申请日：2015-06-17

Applicant: QUALCOMM Incorporated

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

IPC: H04N7/12 ,  H04N19/136 ,  H04N19/31 ,  H04N19/44 ,  H04N19/184 ,  H04N19/187 ,  H04N19/59 ,  H04N19/119 ,  H04N19/169 ,  H04N19/196 ,  H04N19/70 ,  H04N19/30

CPC classification number: H04N19/136 ,  H04N19/119 ,  H04N19/184 ,  H04N19/187 ,  H04N19/188 ,  H04N19/196 ,  H04N19/30 ,  H04N19/31 ,  H04N19/44 ,  H04N19/59 ,  H04N19/70

Abstract: Techniques and systems are provided for encoding video data. For example, a method of encoding video data includes generating an encoded video bitstream including multiple layers. The encoded video bitstream includes a parameter set defining parameters of the encoded video bitstream. The method further includes determining one or more parameters of the parameter set that include information describing a first sub-bitstream of the encoded video bitstream that includes one or more layers with video data and information describing a second sub-bitstream of the encoded video bitstream that includes one or more layers with no video data. The method further includes performing a bitstream conformance check on the first sub-bitstream or the second sub-bitstream based on whether at least one layer of the first sub-bitstream or the second sub-bitstream includes video data.