size thing but you wanted this let's say you had a video you wanted to watch on home if somebody first encodes the entire video sensitive crosses one file and only then you can decode and play it's not great you want to be able to stream it across so you have there are reasons to chunk where you're actually for bill optimality of compression but you reduce latency and getting things across we will look at some other codes a little later and it's a really good question that actually fits very well with her describing so the coding systems we'll