Gop Size Effect on VVC Encoder Performance with MRF Varation
Rana Jassem, Taheni Damak, Mohamed Ali Ben Ayed, Nouri Masmoudi · 2024
The exponential growth of multimedia content and applications underscores the ongoing challenge of developing advanced video coding standards that not only enhance compression rates but also incorporate essential features while addressing increasing complexity in computational processing. Among these standards, the Versatile Video Coding (VVC) standard stands out for its superior efficiency compared to its predecessors. As one of the key parameters in video compression algorithms, the size of Group of Pictures (GOP) determines the frames interdependency in the encoded video. The GOP size significantly influences the performance of a Video Coding Standard (VVC) encoder, particularly in conjunction with Multiple Reference Frame (MRF) variation. Adjusting the GOP size can have a profound impact on compression efficiency and visual quality for video coding. In this study, we investigate the effect of varying MRF configurations and GOP sizes on the performance of VVC encoder. Furthermore, we advance the notion that achieving diverse MRF configurations is feasible through strategic adjustments to the number of reference frame within each reference list. In this paper, we present statistical results showing the impact of different Quantization Parameters (QPs) and GOP size on encoder performance for each configuration. Based on our results, varying GOP size with MRF configurations has a significant positive impact on encoder performance as measured by bitrate and execution time for several values of QP without affecting the quality of the reconstructed video and the resulted bitrate.