Digital Watermark System based on improved security through Pre-Processing of watermarked data using Information of Image Discrete Frequency

Digital watermarking is an insertion technique where specific data that represents copyrights and ownership of multimedia contents such as audio, video, image and texts are inserted, which is a method to prevent illegal distribution, or copying of the product without proper authorization from maker or owner. In this research, unlike the existing image watermarking method wherein watermark is done to the frame itself, a model which extracts audio information within the moving picture, inserts image watermark into the extracted audio information which represents the owner, then combines original image together with digital audio watermark image. Also, suggests a model that improves security of watermark itself, by conducting pre-processing of watermark.