means for obtaining a picture information part, wherein said {HEAD ~ picture information part} comprises first blocks having substantial picture information selected from {TAIL ~ said picture information signal}, no substantial picture information being omitted therefrom and guard bands being inserted in each and between blocks of information 
means for obtaining a picture information part , wherein said { HEAD ~ picture information part } comprises first blocks having substantial picture information selected from { TAIL ~ said picture information signal } , no substantial picture information being omitted therefrom and guard bands being inserted in each and between blocks of information
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH