UCVC: A Unified Contextual Video Compression Framework with Joint
  P-frame and B-frame Coding
Jiayu Yang Wei Jiang Yongqi Zhai Chunhui Yang Ronggang Wang
This paper presents a learned video compression method in response to video
compression track of the 6th Challenge on Learned Image Compression (CLIC), at
DCC 2024.Specifically, we propose a unified contextual video compression
framework (UCVC) for joint P-frame and B-frame coding. Each non-intra frame
refers to two neighboring decoded frames, which can be either both from the
past for P-frame compression, or one from the past and one from the future for
B-frame compression. In training stage, the model parameters are jointly
optimized with both P-frames and B-frames. Benefiting from the designs, the
framework can support both P-frame and B-frame coding and achieve comparable
compression efficiency with that specifically designed for P-frame or
B-frame.As for challenge submission, we report the optimal compression
efficiency by selecting appropriate frame types for each test sequence. Our
team name is PKUSZ-LVC.