A New DCT based Color Video Watermarking using Luminance Component

This paper presents a new blind secure video watermarking algorithm using DCT (discrete cosine transform). In this proposed algorithm cover video is divided into frames and watermark is inserted into selected frames. For selected video frames two-dimensional 8×8 discrete cosine transform is carried out on luminance component. Finally binary watermark is embedded into mid frequency DC coefficients by adjusting coefficients DCT(4,3) and DCT(5,2). Experimental results shows that the proposed algorithm is imperceptible as well as robust against wide variety of signal and video processing attacks like Gaussian noise, Salt –pepper noise, Gaussian filter, Median filter, Histogram Equalization etc. The technique is fairly acceptable and watermarked video is of good quality, achieves high PSNR. The technique shows efficient extraction of watermark with NC value of the retrieved watermark as 1.