公开(公告)号：US11240503B2

公开(公告)日：2022-02-01

申请号：US17117142

申请日：2020-12-10

Applicant: University of Electronic Science and Technology of China

Inventor： Ce Zhu ,  Hongwei Guo ,  Yuyang Liu ,  Mao Ye

IPC: H04N19/124 ,  H04N19/147 ,  H04N19/177 ,  H04N19/52

Abstract: A method for optimizing a second coding is provided. The method includes: Setting a quantization parameter of a start frame of a video sequence according to a range of an input quantization parameter QP0 of a coder; performing first coding with a simplified method, and calculating a frame-level temporal impact factor ki of a current frame and a block-level temporal impact factor kB,j of all 16×16 pixel blocks in the current frame; restoring reference list information of the coder after the first coding is completed, and then determining whether a scene is switched; and performing the second coding by setting quantization parameters with different strategies according to whether the scene is switched.

公开(公告)号：US20210185318A1

公开(公告)日：2021-06-17

申请号：US17117142

申请日：2020-12-10

Applicant: University of Electronic Science and Technology of China

Inventor： Ce Zhu ,  Hongwei Guo ,  Yuyang Liu ,  Mao Ye

IPC: H04N19/124 ,  H04N19/177 ,  H04N19/147 ,  H04N19/52

Abstract: A method for optimizing a second coding is provided. The method includes: Setting a quantization parameter of a start frame of a video sequence according to a range of an input quantization parameter QP0 of a coder; performing first coding with a simplified method, and calculating a frame-level temporal impact factor ki of a current frame and a block-level temporal impact factor kB,j of all 16×16 pixel blocks in the current frame; restoring reference list information of the coder after the first coding is completed, and then determining whether a scene is switched; and performing the second coding by setting quantization parameters with different strategies according to whether the scene is switched.