inverse transforming the demultiplexed signals to obtain {HEAD ~ image domain signals representative} of {TAIL ~ subsampled spatially offset frames}; and 
of
inverse transforming the demultiplexed signals to obtain { HEAD ~ image domain signals representative } of { TAIL ~ subsampled spatially offset frames } ; and
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH