Read this: Study shows compression gains
Summary: The tests showed that bit rate savings of 59 on average can be achieved by HEVC for the same perceived video quality, which is higher than a bit rate saving of 44 demonstrated using a standard objective quality metric. The evaluation suggests that for a given bit rate the subjective quality improvements of HEVC are typically greater than the objective quality improvements measured by the PSNR method that was mainly used during development of the standard. - informitv.cominformitv.comStudy shows compression gains…
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