Year 57 - Issue 2 - August 2008
Cover Contents G.F. Barbieri
Editorial
Torino, 8-12 maggio 2008
“La TV con un libro dentro”
A new service proposal of “Televideo RAI”
on Digital Terrestrial Television
During the last International Book Fair of Turin, the main event in Italy dedicated to books, reading and culture, RAI presented a location demo of the future service of Televideo RAI named “Digital Television Telesoftware”. In partnership with Direzione Televideo, Direzione Strategie Tecnologiche and Centro Ricerche e Innovazione Tecnologica is now available a transmission trial of databroadcasting system to deliver multimedia information to blind and partially sighted people. Using the new Telesoftware system the user could be able to receive up to date multimedia content over a PC platform. The offer provides daily informations, audiobooks, fable for children, text, music and so on…
Ravello, 21-23 giugno 2008
“Il nuovo nella Musica”
Qualità Tecnica e
Piattaforme Innovative
 .
Amsterdam, 11-16 settmbre 2008
Super Hi-Vision a IBC 2008
Live Demonstrations.
Leonardo Scopece
Holophony - Trials with Holophone H2-PRO microphone
From January to June 2008 we carried out trials with Holophone H2-Pro microphone, to verify its handiness in various shooting conditions and the quality of obtainable results. The characterization of a wide selection of events and shooting conditions implied the displacement into various Italian sites. These experiences contriubuted not only to the technical knowledge enrichment, but also to the cultural awarness of the participants.
Andrea Bertella, Bruno Sacco, Mirto Tabone
SFN DVB-T: Q&A
(Everything You Always Wanted to Know About SFN,
But Were Afraid to Ask)
We gathered some “frequently asked questions” about the design, maintenance and control of SFN (single-frequency network). Although DVB-T is explicitly addressed, same concepts also apply to other OFDM-based system. We added some basic questions and tried to give simple and clear answers, yet based on years of hands-on experience.
Marzio Barbero, Natasha Shpuza
Near Shannon limit.
60 years after
Sixty years ago, Claude E. Shannon formulated a fundamental equation, a landmark in the communication theory. It is the relationship between the channel capacity and its bandwidth. In the following years, the evolution of the error correcting codes was rapid, with the objective to find coding schemes to approach channel capacity , hereafter called "the Shannon limit". At the beginning, applications were mainly found for Deep-Space Communications. More recently, achievents in this field were fundamental to implement applications and services nowdays essentials, as mobile services and digital TV broadcasting. In the last 15 years, with the Turbo Code breakthrough and the following rediscovery of LDPC Codes, we are able to approach, and nearly reach, the Limit. Among the first applications to meet the result, the second generation TV broadcasting system DVB-S2 is preeminent.