公开(公告)号：US11418795B2

公开(公告)日：2022-08-16

申请号：US17460360

申请日：2021-08-30

Applicant: University of Electronic Science and Technology of China

Inventor： Ce Zhu ,  Han Qin ,  Yonghua Wang ,  Yipeng Liu ,  Kai Liu

IPC: H04N19/147 ,  H04N19/176 ,  H04N19/51 ,  H04N19/149

Abstract: A temporal domain rate distortion optimization based on video content characteristic and QP-λ correction provides the temporal domain rate distortion optimization based on the video content characteristic and the QP-λ correction for a new generation encoder AV1, wherein according to a previous temporal domain dependency relationship under an HEVC-RA coding structure, a feature of the new generation encoder AV1 and a video sequence feature, an aggregation distortion of a current coding unit and an affected future coding unit is estimated and ta propagation factor of the current coding unit in a temporal domain distortion propagation model is calculated by constructing a temporal domain distortion propagation chain, wherein a Lagrange multiplier is adjusted through a more accurate propagation factor to realize a temporal domain dependency rate distortion optimization, and a relationship of QP-λ is re-corrected and an I frame is adjusted to achieve a better coding effect.