Adaptive Quantization Parameter Selection Leveraging the Inter-Frame Distortion Propagation for HEVC Video Coding

摘要

In video coding, inter-frame motion prediction eliminates temporal correlation greatly however bring about strong dependency characterized by inter-frame distortion propagation, which makes currently independent rate-distortion optimization (RDO) non-optimal any more. This paper proposes adaptive quantization parameter (QP) selection algorithm for global RDO by modeling the function between change of distortion propagation (ΔD) and QP change (ΔQP) as well as change of bitrate (ΔR) and ΔQP. Experimental results show that the proposed algorithm achieves promising BD-BR performance.