公开(公告)号：US20220224946A1

公开(公告)日：2022-07-14

申请号：US17707581

申请日：2022-03-29

Applicant: DOLBY LABORATORIES LICENSING CORPORATION

Inventor： Peng Yin ,  Fangjun Pu ,  Taoran Lu ,  Tao Chen ,  Walter J. Husak ,  Sean Thomas McCarthy

IPC: H04N19/85 ,  H04N19/119 ,  H04N19/136 ,  H04N19/147 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46

Abstract: Given a sequence of images in a first codeword representation, methods, processes, and systems are presented for image reshaping using rate distortion optimization, wherein reshaping allows the images to be coded in a second codeword representation which allows more efficient compression than using the first codeword representation. Syntax methods for signaling reshaping parameters are also presented.

公开(公告)号：US11323728B2

公开(公告)日：2022-05-03

申请号：US17212701

申请日：2021-03-25

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Robin Atkins ,  Peng Yin ,  Taoran Lu ,  Fangjun Pu ,  Sean Thomas McCarthy ,  Walter J. Husak ,  Tao Chen ,  Guan-Ming Su

IPC: H04N19/31 ,  H04N19/187

Abstract: Methods and systems for frame rate scalability are described. Support is provided for input and output video sequences with variable frame rate and variable shutter angle across scenes, or for input video sequences with fixed input frame rate and input shutter angle, but allowing a decoder to generate a video output at a different output frame rate and shutter angle than the corresponding input values. Techniques allowing a decoder to decode more computationally-efficiently a specific backward compatible target frame rate and shutter angle among those allowed are also presented.

公开(公告)号：US11277623B2

公开(公告)日：2022-03-15

申请号：US17008671

申请日：2020-09-01

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Peng Yin ,  Taoran Lu ,  Fangjun Pu ,  Sean Thomas McCarthy

IPC: H04N19/159 ,  H04N19/46 ,  H04N19/82 ,  H04N19/36 ,  H04N19/107 ,  H04N19/51 ,  H04N19/176

Abstract: To support lossless mode at the block level when in-loop reshaping (LMCS) is enabled, the following changes are proposed to the existing LMCS pipeline. In intra mode, encode lossless blocks in the original domain, thus bypassing inverse mapping after reconstruction in the decoder. In inter mode, encode lossless blocks in the original domain, thus bypassing both forward mapping after motion compensation and inverse mapping after reconstruction in the decoder. In both modes, disable any LMCS-related color scaling.

公开(公告)号：US20210084307A1

公开(公告)日：2021-03-18

申请号：US17008671

申请日：2020-09-01

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Peng Yin ,  Taoran Lu ,  Fangjun Pu ,  Sean Thomas McCarthy

IPC: H04N19/159 ,  H04N19/46 ,  H04N19/82 ,  H04N19/176 ,  H04N19/107 ,  H04N19/51 ,  H04N19/36

Abstract: To support lossless mode at the block level when in-loop reshaping (LMCS) is enabled, the following changes are proposed to the existing LMCS pipeline. In intra mode, encode lossless blocks in the original domain, thus bypassing inverse mapping after reconstruction in the decoder. In inter mode, encode lossless blocks in the original domain, thus bypassing both forward mapping after motion compensation and inverse mapping after reconstruction in the decoder. In both modes, disable any LMCS-related color scaling.