This is a very interesting work, but I'm a bit confused about whether the Posterior Branch and Prior Branch share the same set of parameters or if they are separate with no parameter sharing, forming an MOT structure. If they do share parameters, then why is feature alignment still necessary? These are my questions.

This is a very interesting work, but I'm a bit confused about whether the Posterior Branch and Prior Branch share the same set of parameters or if they are separate with no parameter sharing, forming an MOT structure. If they do share parameters, then why is feature alignment still necessary? These are my questions.