In the media signal processing laboratory, the research field for each theme is as follows. The first research field concerned with "coding theory" is targeted to develop the advanced coding and decoding techniques based on graph theory or algebraic theory for various communication systems including networks and data storage. The second research field concerned with "signal processing" is targeted to design element signal processing technologies for future ultra-high density magnetic recording system. The third research field concerned with "neural networks" is targeted to introduce the new neural network techniques for non-linear signal processing, or related to pattern recognition, machine learning and data mining. The fourth research filed concerned with "optimal theory" is targeted to formulate efficient algorithms for statistical learning or linear prediction for signal processing. The fifth research field concerned with "information theory" is targeted to apply information compression technologies in various multimedia contents.