Pretty sure he's just referring to backprop[0] correcting weights more dramatically at one layer vs. another layer [0]http://en.m.wikipedia.org/wiki/Backpropag

Pretty sure he's just referring to backprop[0] correcting weights more dramatically at one layer vs. another layer [0]http://en.m.wikipedia.org/wiki/Backpropagation http://en.m.wikipedia.org/wiki/Backpropagation