Tech Feature: SSAO and Temporal Blur

[Red]

^ What he said

He said herb derb, hurb, durb.

I've never been keen in Ambient Occulsion. I've always turned them off to improve the performance, but after watching this demonstration, i've finally understood the stuff behind it. It makes
objects look more dynamic and thus more realistic.

But i am still yet confused what is between HDAO,HBAO and SSAO.
How they differ from each other?