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Digital Tv in USA
 

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Digital TV in the USA

The arrival of digital television in the United States has had a slow and long process; this system has been introduced since the forties and fifties to every American home, until nowadays, when from June the 12th, the digital signal will be the only one emitted.


The new system works specially between the 470 to 890 MHz band (between channels 14 to 83) and in UHF frequencies. The new system and the old one will have to coexist up to 2009, when NTSC emissions must be interrupted, in both, the 54 to 216 MHz (between channels 2 and 13) and in UHF and VHF frequencies.

This date has been postponed for 4 months due to the high cost of the converter boxes, but many television companies have started distributing the decoders so the users can watch digital television, although not all the broadcasters have migrated to the digital change, they are emitting both signals.
 

It is important to point out that the digital sign will change the experience of watching television, because it uses a digital method to send and receive the television transmissions, allowing the broadcasters to offer programs with better image and sound quality. It also offers many applications, such as multiple choices for programming and interactive capacity.

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It is also important to indicate that digital television can be sent through different media, such as cable (Tricom is offering this service), via satellite (several companies are already offering this service), via Internet through the IP TV concept and through the air or technically called Digital Terrestrial Television (DTT or DTTV) which is the one the viewers receive in their homes through their antennas, and is precisely the one people mean when they talk about the change to digital television.

The great benefit of changing the format of digital television is that some parts of the transmission specter will be released; this specter is really valuable for public security communications (such as police, firemen and rescue squads transmissions.

A major inconvenient is that everyone who wants to enjoy digital television would have to purchase the digital decoder, which is an extra spend for the already critic economic condition in which the American homes are found, because this equipment will convert the analog format into the digital one in order to retransmit the signal into the standard televisions.

Analogue televisions plugged to these decoders would be able of tuning digital images, but not necessarily with all the original digital quality.

Finally, I would like to make an observation regarding the postponement that the president Obama proposed before the American Congress, I think it was very clever because even though everything has been planned out, there are still some fails and setbacks because of the lack of federal subsidies; that is why it is better that they keep on with a slow process, so everyone can be benefitted from this new service and no one is left out of enjoying television’s new era.

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