If {HEAD ~ shrinking} of {TAIL ~ 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 2×2×12 vectors 
of
If { HEAD ~ shrinking } of { TAIL ~ 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 2×2×12 vectors
OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL 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 OTH OTH