have the a be channel prediction you quantized it and now you're going to use Krauser to be lost to predict your actual a B channel information so that is basically how the colorization work is done another version of this done by Richard Zhang was trying to do something like a split brain or encode or a split view or encoder which is you've separate the channels in your source you have encoders that try to predict the other channel from the current channel so where X 2 hat is the other channel prediction and X 1 hat is the prediction