Video Watermarking in H.264/AVC Compressed Domain Using CAVLC Mapping
In this paper, a fragile watermarking algorithm for H.264/AVC compressed video using CAVLC mapping is proposed. By extensive analysis with several video sequences, we observed that not all code words appear in the bit stream. Watermark bits can be embedded by mapping used CAVLC code words to unused code words. During the embedding process, the eligible code words are first identified, and then the mapping rules between these code words- and the watermark bits are established. The watermark information can be extracted directly from the encoded stream without resorting to the original video, and merely requires decoding the CAVLC code from bit stream rather than decoding the whole video. Experimental results show that the proposed watermarking scheme can effectively embed information with little bit rate increase and almost no quality degradation.
Compressed domain watermarking Context-adaptive variable length coding (CA VLC) Code-space Code words mapping Integrity verification
XU Da-wen WANG Rang-ding
School of Electronics and Information Engineering Ningbo University of Technology Ningbo, China CKC software lab Ningbo University Ningbo, China
国际会议
重庆
英文
1510-1513
2011-08-20（万方平台首次上网日期，不代表论文的发表时间）