>Approximately 50% higher compression than x264 [1] and 30% higher than H.265 (HEVC) What is the relative improvement between codec generations (e.g. H.264 vs.

>Approximately 50% higher compression than x264 [1] and 30% higher than H.265 (HEVC) What is the relative improvement between codec generations (e.g. H.264 vs. H.265) compared to implementations of the same codec standard (e.g. early reference implementation of H.264 vs. current x264 with well-chosen parameters)?