公开(公告)号：US20210076054A1

公开(公告)日：2021-03-11

申请号：US16561478

申请日：2019-09-05

申请人： Apple Inc.

发明人： Mei GUO ,  Jun XIN ,  Yeping SU ,  Hsi-Jung WU ,  Alexandros TOURAPIS

IPC分类号： H04N19/44 ,  H04N19/159 ,  H04N19/46 ,  H04N19/172 ,  H04N19/177

摘要： Techniques for video exchange are disclosed in which a video source sends redundant copies of video coded at a given presentation time. A decoder may determine, from metadata stored with a first decoded frame, whether other decoded frames have been designated as correlated to the first decoded frame. If so, the decoder may fetch other decoding frames using time indicator values of other decoded frames in metadata stored with the first decoded frame. When other decoded frame(s) are found, the decoder may blend content of the first coded frame and the other decoded frame(s). The decoder may render the blended frame. When one such coded frame is an intra-coded frame, the proposed technique may alleviate beating artifacts by blending recovered data of the intra-coded frame with recovered data of another frame, which may be inter-coded.

公开(公告)号：US20200120345A1

公开(公告)日：2020-04-16

申请号：US16156193

申请日：2018-10-10

申请人： Apple Inc.

发明人： Mei GUO ,  Jun XIN ,  Jun XU ,  Yeping SU ,  Chris CHUNG ,  Xiaosong ZHOU ,  Hsi-Jung WU

IPC分类号： H04N19/186 ,  H04N19/12 ,  H04N19/136 ,  H04N19/51

摘要： Systems and methods are disclosed for reshaping HDR video content to improve compression efficiency while using standard encoding/decoding techniques. Input HDR video frames, e.g., represented in an IPT color space, may be reshaped before the encoding/decoding process and the corresponding reconstructed HDR video frames may then be reverse reshaped. The disclosed reshaping methods may be combinations of scene-based or segment-based methods.

公开(公告)号：US20230096567A1

公开(公告)日：2023-03-30

申请号：US17951919

申请日：2022-09-23

申请人： APPLE INC.

发明人： Alican NALCI ,  Alexandros TOURAPIS ,  Hsi-Jung WU ,  Jiefu ZHAI ,  Jingteng XUE ,  Jun XIN ,  Mei GUO ,  Xingyu ZHANG ,  Yeqing WU ,  Yunfei ZHENG ,  Jean Begaint

IPC分类号： H04N19/147 ,  H04N19/42 ,  H04N19/172 ,  H04N19/176 ,  H04N19/186 ,  H04N19/119 ,  H04N19/91 ,  H04N19/70 ,  H04N19/124 ,  H04N19/60

摘要： Improved neural-network-based image and video coding techniques are presented, including hybrid techniques that include both tools of a host codec and neural-network-based tools. In these improved techniques, the host coding tools may include conventional video coding standards such H.266 (VVC). In an aspects, source frames may be partitioned and either host or neural-network-based tools may be selected per partition. Coding parameter decisions for a partition may be constrained based on the partitioning and coding tool selection. Rate control for host and neural network tools may be combined. Multi-stage processing of neural network output may use a checkerboard prediction pattern.