A digital video watermarking algorithm using 3D-DCT and intra-cubic correlation is proposed. More specifically, we divide the video sequence into non-overlapping image cubes and take a 3D-DCT on each image cube. The coefficients in the frequency domain in the cube are randomly selected and partitioned into two equal sets. Then, by referring the user-defined logo, a small value is added to the coefficients in one set while the same amount is subtracted from those of the other set. By taking the difference of mean values of the two sets in each cube, we can extract the watermark bits embedded into the cube. Collecting all watermark bits and visually inspecting the collected image logo, one can assert the copyright of the video. Experimental results show that we can extract over 90% of the binary logo image for various possible attacks such as MPEG compression, frame-rate changes, format conversion and frame skipping.

Date Published: 1 August 2001
PDF: 9 pages
Proc. SPIE 4314, Security and Watermarking of Multimedia Contents III, (1 August 2001); doi: 10.1117/12.435455

Published in SPIE Proceedings Vol. 4314:
Security and Watermarking of Multimedia Contents III
Ping Wah Wong; Edward J. Delp III, Editor(s)