Design and analysis of multimedia communication system

In this paper, we propose an efficient compression/decompression technology and encryption/decryption technology for a multimedia communication system. In order to reduce the volume of multimedia data over wireless channels, data compression techniques are widely used. Discrete cosine transform (DCT) is one of the major compression Scheme. Hence, we present Dynamic bit-width adaptation scheme in discrete cosine transform (DCT) as an efficient compression technique. We select the appropriate operand bit widths that achieve significant reduction of power consumption. It is essential to protect the confidential image data from unauthorized access for multimedia applications. Hence, in this paper, we present a modification to the Advanced Encryption Standard (MAES) to reflect a high level security and better image encryption. The modification is done by adjusting the Shift Row Transformation.