blockidct2.m

用matlab写的仿真H.263标准的程序

function IDctData = BlockIDct2(DQCoeff)
%块级的二维反余弦变换
%输入 DQCoeff:8x8,double
%输出 IDctData: 8x8, double

%检查输入参数个数
msg = nargchk(1,1,nargin);

if ~(isempty(msg)) %检查输入参数是否为1个
    disp(msg)
    return ;
end

[M,N] = size(DQCoeff);
if M ~= 8 || N ~= 8
    disp('输入参数维数不对');
    return ;
end

IDctData = idct2(DQCoeff(1:8,1:8));