公开(公告)号：WO2018067729A1

公开(公告)日：2018-04-12

申请号：PCT/US2017/055185

申请日：2017-10-04

Applicant: QUALCOMM INCORPORATED

Inventor： CHUANG, Hsiao-Chiang ,  CHEN, Jianle ,  LI, Xiang ,  ZHANG, Kai ,  BUGDAYCI SANSLI, Done ,  KARCZEWICZ, Marta ,  CHIEN, Wei-Jung ,  SUN, Yu-Chen

IPC: H04N19/105 ,  H04N19/176 ,  H04N19/137 ,  H04N19/44 ,  H04N19/577

Abstract: Techniques and systems are provided for processing video data. For example, video data can be obtained for processing by an encoding device or a decoding device. Bi- predictive motion compensation can then be performed for a current block of a picture of the video data. Performing the bi-predictive motion compensation includes deriving one or more local illumination compensation parameters for the current block using a template of the current block, a first template of a first reference picture, and a second template of a second reference picture. The templates can include neighboring samples of the current block, the first reference picture, and the second reference picture. The first template of the first reference picture and the second template of the second reference picture can be used simultaneously to derive the one or more local illumination compensation parameters.

Abstract translation: 提供了用于处理视频数据的技术和系统。 例如，可以获得视频数据以供编码装置或解码装置处理。 然后可以针对视频数据的图片的当前块执行双向预测运动补偿。 执行双向预测运动补偿包括使用当前块的模板，第一参考图片的第一模板和第二参考图片的第二模板来导出当前块的一个或多个局部照明补偿参数。 模板可以包括当前块的相邻样本，第一参考图片和第二参考图片。 可以同时使用第一参考图片的第一模板和第二参考图片的第二模板来导出一个或多个局部照明补偿参数。

公开(公告)号：WO2019199953A1

公开(公告)日：2019-10-17

申请号：PCT/US2019/026766

申请日：2019-04-10

Applicant: QUALCOMM INCORPORATED

Inventor： CHAO, Yung-Hsuan ,  SUN, Yu-Chen ,  CHIEN, Wei-Jung ,  CHEN, Yi-Wen ,  KARCZEWICZ, Marta

IPC: H04N19/513 ,  H04N19/44 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/577

Abstract: A method of decoding video data comprising performing a prediction process for one or more neighboring blocks of video data that are neighboring a current block of video data to obtain prediction pixel values for neighboring pixels of the current block of video data, deriving a template for the current block of video data using the prediction pixel values, performing a decoder-side motion vector derivation technique using the derived template to derive a motion vector for the current block of video data, and decoding the current block of video data using the derived motion vector.

公开(公告)号：WO2019143795A1

公开(公告)日：2019-07-25

申请号：PCT/US2019/013977

申请日：2019-01-17

Applicant: QUALCOMM INCORPORATED

Inventor： CHEN, Yi-Wen ,  CHIEN, Wei-Jung ,  SUN, Yu-Chen ,  ZHANG, Li ,  CHUANG, Hsiao-Chiang ,  KARCZEWICZ, Marta

IPC: H04N19/513 ,  H04N19/44 ,  H04N19/57

Abstract: Improved systems and methods related to decoder-side motion vector derivation (DMVD), for example, in applying one or more constraints to motion information, such as a MV derived by DMVD, and/or a MV difference between an initial MV and an MV derived by DMVD. These techniques may be applied to any of the existing video codecs, such as HEVC (High Efficiency Video Coding), and/or may be an efficient coding tool in any future video coding standards. In one example, the block size used for DMVD can be restricted. In another example, FRUC bilateral matching can be simplified by not searching outside reference blocks indicated by the original motion vector.

公开(公告)号：WO2018156628A1

公开(公告)日：2018-08-30

申请号：PCT/US2018/019018

申请日：2018-02-21

Applicant: QUALCOMM INCORPORATED

Inventor： CHEN, Yi-Wen ,  CHIEN, Wei-Jung ,  CHUANG, Hsiao-Chiang ,  CHEN, Jianle ,  LI, Xiang ,  KARCZEWICZ, Marta ,  SUN, Yu-Chen

IPC: H04N19/51 ,  H04N19/44 ,  H04N19/583 ,  H04N19/573 ,  H04N19/577 ,  H04N19/109

Abstract: An example device for decoding video data includes a memory configured to store video data, and a video decoder implemented in circuitry and configured to determine that motion information of a current block of the video data is to be derived using decoder-side motion vector derivation (DMVD), determine a pixels clue for the current block, the pixels clue comprising pixel data obtained from one or more groups of previously decoded pixels, derive the motion information for the current block according to DMVD from the pixels clue, and decode the current block using the motion information. The video decoder may generate the pixels clue using multiple hypothesis predictions from multiple motion compensated blocks. The video decoder may determine an inter-prediction direction for the motion information according to matching costs between different prediction directions. The video decoder may refine the motion information using a calculated matching cost for the pixels clue.