A decoding method 49 wherein said adapting and grouping also segments said spectral blocks into subblocks, and wherein said {HEAD ~ generating sample blocks} effectively applies a single inverse discrete transform to pairs of {TAIL ~ said subblocks} 
A decoding method 49 wherein said adapting and grouping also segments said spectral blocks into subblocks , and wherein said { HEAD ~ generating sample blocks } effectively applies a single inverse discrete transform to pairs of { TAIL ~ said subblocks }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH 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 OTH TAIL TAIL TAIL TAIL TAIL TAIL