about how much that kind of non real-world that gets compressed so for the remainder of this lecture we'll want to look at is a couple of things first thing we want to look at coding off symbols so we'll start looking at okay what does it mean to actually have a compression system and this will only comment with a method called Huffman coding that is actually used in many many of today's systems and it's actually quite intuitive very simple way to understand how compression could effectively work so I'm going to look at