Data hiding method for broadcasting system

A novel method of hiding data into multimedia contents by using watermarking technology is described in this paper. This method can be used for analog images, digital raw images, JPEG and other compressed images and has advantages over the existing data hiding methods in terms of less distortion to original multimedia contents, robustness against noise attacks, and efficient data embedding/detection. By modifying the summed value of selected DCT coefficients and making the quantization adaptive to the DCT amplitudes and other parameters, the data hiding method is found to be robust against signal distortions in broadcasting system due to noise, contrast and luminance change, pixel shift, and multi-path interference.