Unusual teaching short-cuts to the Levinson and lattice algorithms

The Levinson and lattice algorithms are taught in many signal processing curricula. If only for one reason, the fact that every cell phone solves Yule-Walker equations every 10 ms justifies it all. These algorithms, however, tend to be hard to conceptualize in a few mental images. The paper proposes two such short-cut views, geometric in the wide sense, which have proved to help students "see" the essence of these tools.