The European Broadcasting Union (EBU) is the largest professional association of national broadcasters in the world. Cooperation in the technical sphere is one of the EBU's major activities. The Union is in the forefront of research and development of new broadcast media, and has led or contributed to the development of many new radio and TV systems: radio data system (RDS), digital audio broadcasting (DAB), digital television (DVB), high- definition TV (HDTV). There are a number of open publications on video and audio streaming and broadcasting, relevant marketing and production issues (
see'>http://www.ebu.ch/en/technical/trev/trev_frameset-index.html... EBU Technical Review).