function y = bunquantize(q)% Calculate the value corresponding to a bidirectionally quantized quantity.% q is a 2n by m matrix containing the powers of 2 and their signs for each% quantized value.% See also bquantize.m.n = size(q,1)/2;y = zeros(n,1);signs = 2:2:2*n;powers = signs - 1;for i = 1:size(q,2);    y = y + 2.^q(powers,i).*q(signs,i);end