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