{HEAD ~ a circuit} for decoding the first prediction picture and the second prediction picture from the reference picture and {TAIL ~ a display picture} from the first prediction picture and the second prediction picture 
{ HEAD ~ a circuit } for decoding the first prediction picture and the second prediction picture from the reference picture and { TAIL ~ a display picture } from the first prediction picture and the second prediction picture
HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH