lpcencode.m

来自「常用图像压缩编码码matlab实现。包括：DM编码、变换编码（FFT和DCT）、」· M 代码 · 共 18 行

function y = LPCencode(x, f)
%LPCencode函数用一维无损预测编码压缩图像x，f为预测系数，如果f默认，则f=1，
%就是前值预测。

error(nargchk(1, 2, nargin))
if nargin < 2
    f = 1;
end
x = double(x);
[m, n] = size(x);
p = zeros(m, n);    %存放预测值
xs = x;
zc = zeros(m, 1);
for j = 1: length(f)
    xs = [zc xs(:, 1: end-1)];
    p = p + f(j) * xs;
end
y = x - round(p);