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Digital Terrestrial Television

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Digital Terrestrial Television
TERRESTRIAL TELEVISION
“Digital television is a new television service representing the most significant development in television technology since the advent of color television.” Studente: Francesco Gui (matr.144187) Corso: Telecomunicazioni (a.a.2009/2010)

DIGITAL

INDEX
1. Technology - The digital signal - Digital television types - Transmission scheme 2. Advantages & Disadvantages - Spectrum reallocation . No Ridondance . Digital Dividend - Interaction - Other advantages - Disadvantages 3. Italian Transiction

TECHNOLOGY: The digital signal

Digital Terrestrial Television (DTTV or DTT) is the technological evolution and advance from analogue terrestrial television, which broadcasts land based (terrestrial) signals. Analog is a continuous waveform, with examples such as (naturally occurring) music and voice Digital is a discrete or non-continuous waveform with examples such as computer 1s and 0s
(*see online course material, chapter 2)

TECHNOLOGY: Digital television types
Digital terrestrial Television (Free-to-air, Pay TV) Digital Satellitar Television Digital Cable Television Digital Mobile Television W eb Television (IPTV, P2p TV)

The digital terrestrial tellevision (DTT) has more or less the same performances of analogue terrestrial television. This tecnology only needs users to buy a decoder as it uses the same infrastructures of analogue tv. DTT is divided in free-to-air television (gratis) and pay-tv (or premium), in this case you need to insert a rechargeable card in you decoder in order to see certain channels and transmission. Digital cable television (DCT) and Digital satellitar television (DST) are transmitted by coassial cable, optical fibre or by satellite instead of classical aerials. In these cases the transiction to digital television is easier as users already know they have to buy a decoder and how to use it. Digital mobile television (DMT) is provided by telephone companies which trasmit its signal by their


References: MAIN SOURCES: www.aeranti.it www.dgtvi.it www.digitaleterrestre.rai.it www.digitaltv.gov.hk www.fub.it (Fondazione Ugo Bordoni) www.javnost-thepublic.org www.ofcom.org www.wikipedia.com
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