So far, the bandwidth needed for streaming 4K UHD content to homes through the internet has been crunched down to the point where a connection of between 15 and 25Mbps (more practically the higher end of this scale) is normally enough to let you watch Netflix 4K episodes of House of Cards in their native resolution.
However, for many internet connections to potential subscribers, even this isn’t enough. The HEVC (H.265) and VP9 compression technologies that crunch 4K UHD video from sources like Netflix and Amazon Prime Instant Video or YouTube down so that they can be squeezed through these kinds of internet speeds still exclude many users from access to web content.
Read More:
http://4k.com/news/new-perseus-video-compression-tech-for-4k-streams-6400/