BBC Research and Development has released the details of verification tests on the H.265/HEVC video compression standard.
The results published in the IEEE Transactions on Circuits and Systems for Video Technology (TCSVT), January 2016. BBC R&D video coding research team focused on evaluations of UHD content and definition of analytics.
Tests confirmed the significant compression efficiency improvements achieved in HEVC, verifying the results previously reported using objective quality metrics (PSNR based methods).
Engineers found the compression gains of HEVC compared to AVC were noted to be significantly higher when the subjective metrics (Mean Opinion Scores – MOS) were considered compared to the same considering objective metrics (PSNR).
The overall average bit rate saving achieved by HEVC compared to AVC for the same subjective quality was found to be 59% as supposed to the 44% gain shown with objective quality metrics.
It was also noted that the bit rate savings for larger picture sizes were higher than smaller picture sizes, which is a very encouraging sign for future UHD deployments.
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