Commonalities and peculiarities of DVB-S, DVB-C and DVB-SMATV systems (COMM´s and PEC´s of DVB systems)

A brief summary of the key elements of the different baseline systems, as defined by the digital video broadcasting (DVB) project, is presented. As a major issue, in order to ensure economies of scale in the manufacturing phase and equipment connectivity, attention is paid to identify the common elements of DVB systems for each delivery media. The strategy followed by the DVB project has been to increase the number of common elements while keeping as peculiarities only those aspects strictly related to the physical properties of the transmission media. New ideas are flashed on the ways to implement interactive services by using existing infrastructure or by means of innovative concepts, as the SMATV grouping may be considered