The results are listed in the table below, from where we can see that VP9 does better than HEVC in CPU usage. When it comes to the CPU usage, there are already tests conducted using different resolutions.
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For example, when you play, stream or download HEVC movies to mobiles, your devices is more likely to gets stuck or overheat than H.264. The UHD codecs will requires more power than their predecessors. Playback CPUĬPU usage means how much processing power the codec needs to playback. Small differences can be observed: at low bitrates, HEVC slightly outperforms VP9, and vice versa when the bitrates are high. You can see that the gap between the red and green lines gets larger as the bitrate goes down, and smaller when it goes up.
While for higher bitrates, VP9 can be better than HEVC.īelow is a figure that uses SSIM to show you the quality comparison between HEVC and VP9. In other words, videos encoded with H265 or HEVC have a better visual quality on low bitrates than VP9. Video quality is an important factor to consider, which gives the better quality? Massive tests have shown that HEVC H265 offers superior quality to VP9, but how exactly? HEVC can grab 64圆4, 32x32, or even 16x16 superblocks for low resolutions, while VP9 is fixed to 64圆4. Netflix's tests also clearly showed that HEVC is 20% more efficient than VP9.
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But which will save you more data when you download or stream 720p and 1080p content? VP9 or HEVC? There are many experiments conducted between HEVC and VP9, and the results indicate that HEVC provides from 0.6% to 38.2% bitrate savings over VP9 depending on the objective metric which is used. Both codecs are designed to compress 4K UHD videos to smaller size.
Higher compression efficiency means that less data a codec uses to display an image without quality loss. But yes, if bringing up VP9 vs HEVC comparison, there are differences on compression effectiveness, picture quality and other factors. What's the Difference between VP9 and HEVC?Īpparently, both HEVC and VP9 serve the same purpose of compressing data-intensive HD and 4K videos to half the size as required now, so as to survive the limits of internet requirements, and make it possible to stream UHD videos to users' UHD TVs at less bandwidth without affecting the visual quality.
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