公开(公告)号：US09866869B2

公开(公告)日：2018-01-09

申请号：US14659213

申请日：2015-03-16

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/70 ,  H04N19/30 ,  H04N19/46 ,  H04N19/597 ,  H04N19/105 ,  H04N19/68

CPC classification number: H04N19/70 ,  H04N19/105 ,  H04N19/30 ,  H04N19/46 ,  H04N19/597 ,  H04N19/68

Abstract: In an example, a method of coding video data includes coding, by a video coder, at least a portion of a picture of an independently decodable non-base layer of a multi-layer bitstream. The method also includes coding, by the video coder, data indicating a picture order count (POC) value reset for a POC least significant bits (LSB) value of the picture only when the picture has a POC LSB value for the picture is equal to zero.

公开(公告)号：US09866852B2

公开(公告)日：2018-01-09

申请号：US14743327

申请日：2015-06-18

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/169 ,  H04N19/105 ,  H04N19/159 ,  H04N19/187 ,  H04N19/30 ,  H04N19/70 ,  H04N19/172

CPC classification number: H04N19/188 ,  H04N19/105 ,  H04N19/159 ,  H04N19/172 ,  H04N19/187 ,  H04N19/30 ,  H04N19/70

Abstract: Techniques and systems are provided for decoding and processing video data. For example, a method of decoding video data includes accessing an encoded video bitstream comprising multiple layers. The encoded video bitstream includes multiple access units, with a first access unit including an end of sequence network abstraction layer unit. A second access unit includes an intra random access point picture and is a next subsequent access unit in decoding order following the first access unit. The method further includes reinitializing decoding at the second access unit based on the second access unit being the next subsequent access unit in decoding order following the end of sequence network abstraction layer unit of the first access unit.

公开(公告)号：US20170257529A1

公开(公告)日：2017-09-07

申请号：US15436313

申请日：2017-02-17

Applicant: QUALCOMM Incorporated

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

IPC: H04N1/60 ,  G06T7/90

CPC classification number: H04N1/60 ,  G06T7/90 ,  G06T2207/10016 ,  G06T2207/10024 ,  H04N19/186 ,  H04N19/70

Abstract: Systems, methods, and computer readable media are described for providing improved color remapping. In some examples, a video bitstream is obtained that includes a plurality of pictures having a first color characteristic. A color remapping information (CRI) supplemental enhancement information (SEI) message is identified from the video bitstream. A restriction is placed on the CRI SEI message such that a value of a syntax element of the CRI SEI message is restricted based on a condition. One or more samples of the plurality of pictures is remapped from the first color characteristic to a second color characteristic using a color remapping model of the CRI SEI message according to the restriction. In some cases, the condition is a chroma format of the plurality of pictures, in which case the value of the syntax element of the CRI SEI message is restricted based on the chroma format. In some cases, the condition is a color remap value identifying a purpose of the color remapping model of the CRI SEI message, in which case the value of the syntax element of the CRI SEI message is restricted based on the color remap value.

公开(公告)号：US09729887B2

公开(公告)日：2017-08-08

申请号：US14749534

申请日：2015-06-24

Applicant: QUALCOMM Incorporated

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

IPC: H04B1/66 ,  H04N19/174 ,  H04N19/70 ,  H04N19/187 ,  H04N19/423 ,  H04N19/44 ,  H04N19/129 ,  H04N19/30 ,  H04N19/513 ,  H04N19/196 ,  H04N19/40

CPC classification number: H04N19/174 ,  H04N19/129 ,  H04N19/187 ,  H04N19/196 ,  H04N19/30 ,  H04N19/40 ,  H04N19/423 ,  H04N19/44 ,  H04N19/513 ,  H04N19/70

Abstract: A device for encoding video data includes a memory configured to store at least a portion of a multi-layer bitstream of video data and one or more processors configured to determine that a supplemental enhancement information (SEI) message applies to more than one layer of the multi-layer video data; determine that the SEI message references a syntax element that has multiple instances associated with the more than one layer of the multi-layer video data; and set all of the multiple instances to a same value.

公开(公告)号：US09674544B2

公开(公告)日：2017-06-06

申请号：US14552129

申请日：2014-11-24

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/513 ,  H04N19/597 ,  H04N19/70 ,  H04N19/46 ,  H04N19/30 ,  H04N19/68 ,  H04N19/80

CPC classification number: H04N19/513 ,  H04N19/30 ,  H04N19/46 ,  H04N19/597 ,  H04N19/68 ,  H04N19/70 ,  H04N19/80

Abstract: In an example, a method of decoding video data includes decoding data that indicates a picture order count (POC) reset for a POC value of a first picture of a first layer of multi-layer video data, wherein the first picture is included in an access unit. The example method also includes, based on the data that indicates the POC reset for the POC value of the first picture and prior to decoding the first picture, decrementing POC values of all pictures stored to a decoded picture buffer (DPB) that precede the first picture in coding order including at least one picture of a second layer of the multi-layer video data.

公开(公告)号：US20170111643A1

公开(公告)日：2017-04-20

申请号：US15293199

申请日：2016-10-13

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/30 ,  H04N19/186 ,  H04N19/46 ,  H04N19/184

CPC classification number: H04N19/30 ,  H04N19/184 ,  H04N19/186 ,  H04N19/46

Abstract: Techniques are described for processing video data to conform to a high dynamic range (HDR)/wide color gamut (WCG) color container. Operations may be applied to video data in certain color spaces to enable compression of High Dynamic Range (HDR) and Wide Color Gamut (WCG) video in such a way that an existing receiver without HDR and WCG capabilities would be able to display a viewable Standard Dynamic Range (SDR) video from the received bitstream without any additional processing. Certain embodiments enable delivery of a single bitstream from which an existing decoder obtains the viewable SDR video directly and an HDR capable receiver reconstruct the HDR and WCG video by applying the specified processing. Such embodiments may improve the compression efficiency of hybrid based video coding systems utilized for coding HDR and WCG video data.

公开(公告)号：US20170085896A1

公开(公告)日：2017-03-23

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: H04N19/463 ,  H04N19/66 ,  H04N19/184

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

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：US20160360235A1

公开(公告)日：2016-12-08

申请号：US15175944

申请日：2016-06-07

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/86 ,  H04N19/615 ,  H04N19/147 ,  H04N19/13 ,  H04N19/587 ,  H04N19/105 ,  H04N19/96 ,  H04N19/187 ,  H04N19/119

CPC classification number: H04N19/86 ,  H04N19/103 ,  H04N19/105 ,  H04N19/119 ,  H04N19/13 ,  H04N19/147 ,  H04N19/176 ,  H04N19/186 ,  H04N19/187 ,  H04N19/30 ,  H04N19/36 ,  H04N19/50 ,  H04N19/587 ,  H04N19/615 ,  H04N19/96

Abstract: Techniques are described for identifying and reducing the incidence of artifacts in video using color gamut scalability (CGS) parameters and tables in scalable video coding (SVC). Derivation of CGS mapping tables are performed for each partition of pixel values in a color space. The pixel value domain is split into partitions and each is optimized independently. Color prediction techniques for CGS may be used by video encoders and/or video decoders to generate inter-layer reference pictures when a color gamut for a lower layer of video data is different than a color gamut for a higher layer of the video data. When mapped values are used as inter-layer predication references for the enhancement layer blocks, artifacts may appear in some frames of the sequences. A video encoder may identify blocks that potentially contain these artifacts and disable inter-layer prediction in those identified blocks.

Abstract translation: 描述了使用可缩放视频编码（SVC）中的色域可伸缩性（CGS）参数和表来识别和减少视频中伪像的发生率的技术。 对颜色空间中的像素值的每个分区执行CGS映射表的推导。 像素值域被分割成分区，并且各自被独立地优化。 当用于较低层视频数据的色域不同于用于较高层视频数据的色域时，CGS的颜色预测技术可被视频编码器和/或视频解码器用于生成层间参考图像。 当映射值用作增强层块的层间预测引用时，伪像可能出现在序列的某些帧中。 视频编码器可以标识潜在地包含这些伪像并且在那些识别的块中禁用层间预测的块。

公开(公告)号：US09319679B2

公开(公告)日：2016-04-19

申请号：US13828354

申请日：2013-03-14

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/70 ,  H04N19/61 ,  H04N19/58 ,  H04N19/50

CPC classification number: H04N19/00569 ,  H04N19/58 ,  H04N19/61 ,  H04N19/70

Abstract: A video coder codes a slice header for a slice of video data. The slice header includes a syntax element comprising identifying information for a long term reference picture, wherein the identifying information is explicitly signaled in the slice header or derived from a sequence parameter set corresponding to the slice. When the syntax element indicates that the identifying information for the long term reference picture is explicitly signaled, to code the slice header, the video coder is further configured to code a value for the identifying information for the long term reference picture in the slice header.

Abstract translation: 视频编码器对切片的视频数据进行编码。 切片标题包括语法元素，其包括识别用于长期参考图像的信息，其中识别信息在切片标题中被明确地发信号，或者从对应于切片的序列参数集导出。 当语法元素指示明确地用信号通知长期参考图像的识别信息时，为了对切片标题进行编码，视频编码器还被配置为在切片标题中编码用于长期参考图片的识别信息的值。

公开(公告)号：US20150382022A1

公开(公告)日：2015-12-31

申请号：US14749527

申请日：2015-06-24

Applicant: QUALCOMM Incorporated

Inventor： Adarsh Krishnan Ramasubramonian ,  Ye-Kui WANG

IPC: H04N19/70 ,  H04N19/30

CPC classification number: H04N19/70 ,  H04N19/30 ,  H04N19/50 ,  H04N19/597

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 plurality of video layers in the bitstream, the plurality of video layers in the bitstream divided into a plurality of bitstream partitions, herein each bitstream partition contains at least one of the plurality of video layers. The processor is configured to process a bitstream conformance parameter associated with a first bitstream partition of the plurality of bitstream partitions, wherein the bitstream conformance parameter is applicable to the first bitstream partition but not to another portion of the bitstream not encompassed by the first bitstream partition. The processor may encode or decode the video information in the bitstream.

Abstract translation: 被配置为对位流中的视频信息进行编码的装置包括存储器和与存储器通信的处理器。 存储器被配置为存储与比特流中的多个视频层相关联的视频信息，将比特流中的多个视频层分成多个比特流分区，这里每个比特流分区包含多个视频层中的至少一个。 处理器被配置为处理与多个比特流分区中的第一比特流分区相关联的比特比特流一致性参数，其中比特流一致性参数可应用于第一比特流分区，但不适用于比特流的另一部分，不包括第一比特流分区 。 处理器可以对比特流中的视频信息进行编码或解码。