Blocking-Effect Reduction in a Reversed-Complexity Video Codec Based on a Mixed-Quality Framework

This paper presents a blocking-effect reduction in a method for reversed-complexity video codec. We used intra predicted frames encoded at different quality (distortion) targets. We propose a technique to improve the enhancement layer of a mixed-quality encoded sequence, using information from the high-quality (key) frames to enhance the low-quality (nonkey) ones at the decoder. The results show that it is possible to subjectively reduce the blocking effect by using overlapped motion compensation at the enhancement layer. It is shown that the subjective quality is improved and the objective quality is incremented at the non-key frames.