Title :
Digital watermarking for object-based compressed video
Author :
Lie, Weit Nuitg ; Lin, Guo Shiaizg ; Wang, Ta-Chuiz
Author_Institution :
Dept. of Electr. Eng., Nat. Chung Cheng Univ., Chia-Yi, Taiwan
Abstract :
This paper describes a watermarking algorithm for MPEG4 object-based compressed video. To be compatible to conventional 8×8 DCT, MPEG-4 proposed several graylevel padding algorithms for transparent background pixels of object boundary blocks. Though conventional block-based watermarking schemes can be also applicable to these padded boundary blocks, we would like to devise a method capable of embedding data in both the interior and boundary blocks with equal robustness. In this paper, we have considered the so-called re-padding and re-quantization attacks for segmented objects. Experiments show that our algorithm obtains good robustness and is promising for integration into the MPEG-4 codec for versatile applications
Keywords :
codecs; copy protection; data compression; image segmentation; video coding; MPEG-4 codec; MPEG4 object-based compressed video; graylevel padding algorithms; object boundary blocks; re-padding; re-quantization attacks; robustness; segmented objects; transparent background pixels; watermarking algorithm; Codecs; Decoding; Discrete cosine transforms; Electronic mail; Image coding; MPEG 4 Standard; Robustness; Shape; Video compression; Watermarking;
Conference_Titel :
Circuits and Systems, 2001. ISCAS 2001. The 2001 IEEE International Symposium on
Conference_Location :
Sydney, NSW
Print_ISBN :
0-7803-6685-9
DOI :
10.1109/ISCAS.2001.921003