dct2mtx.m

来自「里面囊括了基于matlab滤波器设计的各种.m文件」· M 代码 · 共 17 行

 % C = dct2mtx(M)
% Provide the type II discrete cosine
% transform matrix
%


function C = dct2mtx(M);
for I = 1:M
   for L = 1:M
     if L==1
      c = sqrt(1/M);
     else
      c = sqrt(2/M);
     end
     C(I,L) = c*cos((pi/M)*(L-1)*((I-1)+0.5));
   end
end