Aha, so the frame rate of my TV sufficiently undersamples the motion of the ball that a blur would appear. Clearly, a zero phase noncausal filter used because

Aha, so the frame rate of my TV sufficiently undersamples the motion of the ball that a blur would appear. Clearly, a zero phase noncausal filter used because there is a pre-echo, and it’s symmetric. But I’d still like to know something about the details of that filter.