If shrinking of {HEAD ~ vectors} is to be performed, the block 1215 implements this function, which is achieved by selecting the largest 4 of the sixteen vector coefficients in order to shrink each vector to {TAIL ~ 2×2×12 vectors} 
If shrinking of { HEAD ~ vectors } is to be performed , the block 1215 implements this function , which is achieved by selecting the largest 4 of the sixteen vector coefficients in order to shrink each vector to { TAIL ~ 2×2×12 vectors }
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL