{HEAD ~ Corresponding segments} are shown for {TAIL ~ the case} of four bit planes and four bitrate groups  
are shown for
{ HEAD ~ Corresponding segments } are shown for { TAIL ~ the case } of four bit planes and four bitrate groups
HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH