A simple spread spectrum watermarking algorithm voice, including pn generation function, watermark embedding and extraction algorithms, watermark and attack functions, plus two test functions, which out_test is watermarking attack after watermark extraction.

bupt.bmp
dh_ds.m
hide_ds.m
image_attack.m
lena.bmp
out_test.m
pn_gen.m
test.m
Vector2Matrix.m

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