covers the background on essentially information theory slack impression that we'll be covering in this lecture at least the first half in the second half will dive a lot more in the deep learning aspects and how and tied it into this so some applications you might have seen jarick file compression gz p z 7z a zip file systems various multimedia formats you might have seen a file - fake file gif file mp3 mp4 communications that maybe you don't see news anymore now but where compression played a big role in the