Abstract: A method of introducing a non-perceptional signal (watermark) to a digital media data is disclosed. The method is based on the representation of source digital data using a special matrix, insertion of a digital watermark into the special matrix to receive the watermarked matrix, and generation of the watermarked data using the source data and the watermarked matrix. In addition, watermark detection of the watermarked data is performed by calculating the special matrix from the watermarked data.

Abstract: Methods of embedding and detecting a watermark into/from a digital image are disclosed. A method of embedding a watermark in accordance with the present invention includes generating a predicted image of an original image by using a linear predictor; generating a difference image by subtracting said predicted image from said original image or vice versa; and segmenting said difference image into sub-regions. The method further includes the steps of calculating a watermark amplitude for each sub-region or for each pixel of each sub-region; performing a channel coding process on a set of watermark data bits; calculating a watermark block for each sub-region by using said encoded data bits, a pseudo random sequence (PRS) and said watermark amplitude; and embedding said watermark block into each sub-region by adding said watermark block with pixel values of each sub-region.