Securing Copyright of Digital Video by Exploiting Quantized DC coefficients

Abstract

The scheme developed the method to protect the copyright of digital video while encoding the video through MPEG standard. The technique suggested to insert the same watermark at two different locations in intra-coded frame. As these frames have highest degree of luminance part as comparision to Bi-directional(B-frames) and Predicting-frames (P-frames), therefore a little alteration to such frames doesn’t degraded the perceptibility of proposed video watermarking method. The scheme also tested the robustness by applying intentional and unintenional attacks which provides satisfactory results for most of the attack A reasonable size of watermark bits can also be adjusted in a single I-frames as it contains the sufficient number of quantized discrete cosine transform block therefore great size of watermark can be accomodated in the video object.