公开(公告)号：US20170332099A1

公开(公告)日：2017-11-16

申请号：US15591813

申请日：2017-05-10

Applicant: QUALCOMM Incorporated

Inventor： Sungwon Lee ,  Wei-Jung Chien ,  Li Zhang ,  Marta Karczewicz

IPC: H04N19/56 ,  H04N19/122 ,  H04N19/176

CPC classification number: H04N19/56 ,  H04N19/122 ,  H04N19/176 ,  H04N19/51 ,  H04N19/52

Abstract: A method of decoding video data includes constructing a motion vector candidate list of merge candidates for the current block of video data based on motion information from a number of neighboring blocks relative to the current block, wherein the number of neighboring blocks considered for the motion vector candidate list is based on the size of the current block, and wherein the number of neighboring blocks is greater than 5. In some examples, the method includes deriving a histogram of motion vector information for the neighboring blocks, and constructing the motion vector candidate list based on the derived histogram.

公开(公告)号：US20170238005A1

公开(公告)日：2017-08-17

申请号：US15431321

申请日：2017-02-13

Applicant: QUALCOMM Incorporated

Inventor： Wei-Jung Chien ,  Sungwon Lee ,  Li Zhang ,  Marta Karczewicz

IPC: H04N19/513 ,  H04N19/94 ,  H04N19/70 ,  H04N19/573 ,  H04N19/172

CPC classification number: H04N19/513 ,  H04N19/139 ,  H04N19/172 ,  H04N19/176 ,  H04N19/196 ,  H04N19/52 ,  H04N19/573 ,  H04N19/70 ,  H04N19/94

Abstract: In general, this disclosure described techniques for pruning a list of motion vector prediction candidates based on picture order count (POC) values. A video coding device may be configured to generate the list of motion vector prediction candidates for a prediction unit (PU) of video data. The video coding device may prune a first motion vector prediction candidate from the list of motion vector prediction candidates when a POC value for a reference picture identified by the first motion vector prediction candidate is equal to a second POC value of a reference picture identified by a second motion vector prediction candidate in the list of motion vector prediction candidates. The video coding device may code the PU using the pruned list.

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。