Oblivious watermarking scheme for the application of the multimedia communication

This paper presents a watermarking scheme for the application of the multimedia communication. In the proposed algorithm based on the frequency domain, the watermark is embedded into the medium-frequency region using the similar approach to JPEG quantization. However, which position of the medium-frequency region can to provide the better effect in the watermarking system? Hence, we would like to explore the results of that each two DCT coefficients are selected from the different positions in this paper. And, the effect of the different types of host images and watermarks will be analyzed and obtained a better understanded. Moreover, the original image and watermark are not needed in the extracting process. This technique is designed as oblivious.