Robust temporal video watermarking using YCbCr color space in Wavelet domain

Abstract

This paper presents a robust watermarking scheme of digital videos using YCbCr color space and Wavelet based techniques. The proposed scheme divides the given watermark in two parts. One smaller part is embedded in Y channel with lesser embedding strength, while other larger part is embedded in Cr channel with higher embedding strength to achieve good balance of imperceptibility and robustness. Embedding in the Y channel provides robustness against compression attacks while embedding in Cr channel provides robustness against other types of attacks. Spread Spectrum Technique of watermarking is used. In the proposed scheme, the watermark is embedded in a plane which is specifically prepared by the temporal information of the video to achieve maximum imperceptibility. The proposed algorithm is tested against various types of attacks. The results are presented on the basis of PSNR between original and modified video as well as correlation of the original and extracted watermark. It is demonstrated that the proposed algorithm performs well on both the counts.