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#Evolution of the AV1 codec between October 2016, July 2017 and February 2018

###Lossless compression ratio and Weissman score:

codec avg. compression ratio avg. space saving wavg. encode time wavg. decode time Weissman score
daala 2.798 64.26% 1.4952 1.2960 3.2145
av1-20160930 2.912 65.66% 31.1063 1.6304 2.3640
av1-20170809 3.020 66.89% 118.6229 1.1642 2.1707
av1-20180222 2.943 66.02% 97.6492 1.0156 2.1509
Reference (mozjpeg) 1.137 12.05% 14.0222 0.6776 1.0000
bpg 1.150 13.03% 21.4230 5.8602 0.9682

###Encoding times:

![Encodinq time in function of bits per pixel](subset1.encoding_time.(av1-20160930,av1-20170809,av1-20180222).svg)

###Bits per pixel at equivalent quality according to VMAF

![Bits per pixel at equivalent quality according to VMAF](subset1.vmaf.(av1-20160930,av1-20170809,av1-20180222).svg)

###Bits per pixel at equivalent quality according to Y-PSNR-HVS-M

![Bits per pixel at equivalent quality according to Y-PSNR-HVS-M](subset1.psnr-hvs-m.(av1-20160930,av1-20170809,av1-20180222).svg)

###Bits per pixel at equivalent quality according to Y-MSSSIM

![Bits per pixel at equivalent quality according to Y-MSSSIM](subset1.ms-ssim.(av1-20160930,av1-20170809,av1-20180222).svg)

###Bits per pixel at equivalent quality according to Y-SSIM

![Bits per pixel at equivalent quality according to Y-SSIM](subset1.y-ssim.(av1-20160930,av1-20170809,av1-20180222).svg)

###Bits per pixel at equivalent quality according to RGB-SSIM

![Bits per pixel at equivalent quality according to RGB-SSIM](subset1.rgb-ssim.(av1-20160930,av1-20170809,av1-20180222).svg)