Compression Mechanism for Multimedia System in consideration of Information Security

This paper presents the compression mechanism based on the fractal coding and spiral architecture for the color image data of multimedia applications or system. This compression mechanism can be used prior to the encryption in multimedia system security mechanism. Proposed mechanism falls in lossy compression category. Basically, the fractal coding is applied on the grey level images and encoding time is very high. In proposed mechanism, construction of one composite image and use of spiral architecture accelerates the encoding process in comparison with the use of three grey planes of RGB color image with the square architecture. Experimental results show that the encoding time, compression ratio and peak signal to noise ratio varies with the quadtree partitioning tolerance value. Using this compression mechanism, different encryption mechanism can be developed.