Abstract:

A new digital watermarking algorithm for MPEG-4 video based on low density parity check (LDPC) coding is proposed. The watermark is embedded into and retrieved from the MPEG-4 video using the LDPC coding technique and human visual characteristics. The watermark is first encoded with LDPC before embedding into the intermediate frequency coefficients of the luminance components of the I-VOP. The watermark is retrieved blindly from the marked video using the LDPC iterative method. Experimental results show that the proposed algorithm can decrease errors in the extracted watermark and is robust to common video attacking.

Key words: low density parity check (LDPC), MPEG-4, video watermarking