Related, how h265 works:
http://forum.doom9.org/showthread.php?t=167081
This is a great overview and the techniques are similar to those of h264.
I found it invaluable to get up to speed when I had to do some work on the screen content coding extensions of hevc in Argon Streams. They are a set of bit streams to verify hevc and vp9, take a look, it is a very innovative technique:
http://www.argondesign.com/products/argon-streams-hevc/ http://www.argondesign.com/products/argon-streams-vp9/