In a method, piece goods which differ from one another in at least one property are moved by at least one piece-good conveyor into depositing positions of at least one depositing-position conveyor, in order to form groups which are predefined with regard to this property. The BD-ROM playback apparatus includes a BD-J module executing an application, a playback control engine for playing the AVClip belonging to one title, and a module manager for controlling branching between a plurality of titles. Also generating a plurality of sets of projections in a movement frame, wherein each set of projections is generated from any sector amongst the set of sectors from the movement frame.