Authors:
Samira Bouchama
1
;
Latifa Hamami
2
and
Hassina Aliane
1
Affiliations:
1
Research Center on Scientific and Technical Information, Algeria
;
2
National Polytechnic School, Algeria
Keyword(s):
Video watermarking, H.264/AVC standard, Quantized DCT coefficients, Intercorrelation function.
Related
Ontology
Subjects/Areas/Topics:
Computer Vision, Visualization and Computer Graphics
;
Image and Video Analysis
;
Image and Video Watermarking
Abstract:
Considering the importance of watermarking of compressed video, several watermarking methods have been proposed for authentication, copyrights protection or simply for a secure data carrying through the Internet. Applied to the H.264/AVC video standard, in most of cases, these methods are based on the use of the quantized DCT coefficients often experimentally or randomly selected. In this paper, we introduce a watermarking method based on the DCT coefficients using two steps: the first one consists in a watermark pre-processing based on similarity measurement which can allow to adapt the best the watermark to the carrying coefficients of low frequencies. A second step takes advantage from the coefficients of high frequencies in order to maintain the video quality and reduce the bitrate. Results show that it is possible to achieve a very good compromise between video quality, embedding capacity and bitrate.