function v = ds_quantize(y,n)%v = ds_quantize(y,n=2)%Quantize y to % an odd integer in [-n+1, n-1], if n is even, or% an even integer in [-n+1, n-1], if n is odd.%%This definition gives the same step height for both mid-rise%and mid-tread quantizers.if nargin<2    n=2;endif rem(n,2)==0	% mid-rise quantizer    v = 2*floor(0.5*y)+1;else 		% mid-tread quantizer    v = 2*floor(0.5*(y+1));end% Limit the outputL = n-1;i = v>L; if any(i)    v(i) = L(ones(size(v(i))));endi = v<-L;if any(i)    v(i) = -L(ones(size(v(i))));end