Rafael Diniz holds a PhD in Computer Science. He has experience in the areas of digital TV and radio broadcasting, HF radio technologies, hypermedia and multimedia systems, computer graphics and electromagnetic spectrum management. Dr. Diniz has been supporting the free/community radio and TV movements in South America for years. In the 2000’s Rafael participated heavily in the Brazilian Indymedia network and free software movement. In the 2010’s Rafael worked on the development and installation of the first community DTV ISDB-T channel in the world, broadcasting from Buenos Aires on channel 20, and in the deployment of digital HF networks in the Amazon region of Brazil.