Abstract
This paper deals with the impact of constant rate factor value on the objective video quality assessment using PSNR and SSIM metrics. Compression efficiency of H.264 and H.265 codecs defined by different Constant rate factor (CRF) values was tested. The assessment was done for eight types of video sequences depending on content for High Definition (HD), Full HD (FHD) and Ultra HD (UHD) resolution. Finally, performance of both mentioned codecs with emphasis on compression ratio and efficiency of coding was compared.
Highlights
Modern telecommunication networks provide a wide range of multimedia services
The Peak Signal-toNoise Ratio (PSNR) trend line is different for Constant rate factor (CRF) values in the range from 0 to 10
The results indicate that PSNR differences are lower for static scenes; it means that the importance of codec selection is not so substantial for static scenes
Summary
Many research activities focus on objective [1], [2], [3], [4], [5], [6], [7], [8], [9], [10], [11] and [12] and subjective [4], [5], [7] and [13] video quality assessment, only few of them analyze the quality defined by the CRF value [14].
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