Thresholding then proceeds by initializing the vector block and coefficient indices and then computing {TAIL ~ the vector length} as the square root of the sum of squares of {HEAD ~ the vectors component values}  
Thresholding then proceeds by initializing the vector block and coefficient indices and then computing { TAIL ~ the vector length } as the square root of the sum of squares of { HEAD ~ the vectors component values }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH