mulaw_e.m

用DSP译文版课本的程序,相信对学DSP的同学会有所帮助

function [sq] = mulaw_e(yq,B,mu)
% mu-law expander
% ---------------
% [sq] = mulaw_e(yq,B,mu)
% sq = expanded quantized signal
% yq = quantized input in integers: 0 <=yq <= 2^B-1
%  B = bits/sample
% mu = compander parameter
%
swing = (2^B-1)/2;
yq = ((yq-swing)/swing);
if mu == 0
  sq = yq;
else
  sq = (((1+mu).^(abs(yq))-1)/mu).*sign(yq);
end