better way to represent audio than the raw data okay so let's let's write down the mathematical formalism of this problem right which is given a 14 by 14 image X image patch X one way to represent the image patch is with a list of 196 row numbers corresponding to the pixel intensity values the probably one opposes can we come up with a better feature vector to represent those pixels okay and if you can do so then this is what you can do here's a problem called a self-taught learning I guess which is well so in in traditional machine