Analog To Digital

On February 17, 2009, Americans will enter the age of digital television — ready or not.

On that date, all full-power broadcast television stations will begin broadcasting only in digital, improving sound and picture quality as well as allowing for stations to offer multiple programming choices, called multicasting.

The government-mandated change will free up needed frequencies for public safety and new wireless communication offerings.

What’s the difference between analog and digital?

Since television was invented, stations have broadcast analog signals, or continuously varying radio waves. The familiar “snow” or ghosting of images is one problem with this way of sending broadcast signals.  Another issue is the limited bandwidth for an ever increasing number of television channels.

After the transition, broadcasts will be sent only via digital signals, which use a series of zeroes and ones to transmit data just as a computer does. The result is clearer, more reliable picture and sound as well as the opportunity for more programming options and interactive features.

Because of how a digital signal transmits information, it has more room for additional data. So now television stations that once broadcast on one channel, such as channel 3, can now broadcast on several segments of that channel, for example: 3-1, 3-2, 3-3, 3-4. Each channel could offer specialized programming for a particular audience.

HDTV is the highest level of digital television quality, but it is not the only one. SDTV, or standard definition television format, is the quality at which basic digital broadcasts will be provided. SDTV offers an enhancement over traditional analog broadcasts, but it is not as sharp as HDTV.

What do I need to do to be ready?

If you have an analog input television and currently receive your television service through cable or satellite, you will continue to receive your current stations without needing to purchase additional equipment.  However, to receive the full, original quality digital signal, you may need to upgrade your set or get special equipment from your service provider. Simply check with your cable or satellite company for more details.

Note that if your service goes out due to weather or other circumstances, you will no longer be able to receive traditional television channels without a digital tuner or digital-to-analog converter box.

If you have an analog input television and receive your signal via an outside antenna or “rabbit ears,” then you will need to purchase a digital-to-analog converter box to be able to continue watch television. Your set will continue to work as before with gaming consoles, DVD players, VCRs and other similar systems.

The new converter boxes are expected to be available in early 2008 and run between $50 and $70. From January 1, 2008 through March 31, 2009, all U.S. households are eligible for a government coupon program to offset $40 of the cost for up to two boxes per household.  A list of eligible boxes is available from the National Telecommunications and Information Administration, which manages the program.

Aside from buying a converter box or signing up for a cable or satellite service, you could also choose to buy a new digital-input ready television. After May 2007, all new televisions must be ready for receiving digital signals or be clearly marked that additional equipment will be needed.

These next generation television sets are the best way to experience all that digital television has to offer.

Originally published here.

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Originally published here.

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In today’s world, communications are of utmost importance, there is absolutely no doubt about that. Satellite tv is one of the technological breakthroughs of the 20th century. Made possible because of the massive satellite fleets deployed by different companies and with different purposes, satellite tv has in a way revolutionized communications.

The communications satellites of different companies relay on an increasingly diverse range of TV programming. And when it comes to the options you have for your satellite tv receiver, this will greatly depend on the very nature of the satellite tv service you desire to view. There are satellite tv programs which are (FTA). FTA is an abbreviation from “free to air”. However, there are other satellite tv services which are encrypted, and are only available to subscribers of various satellite tv companies.

Another important distinction must also be made between satellite tv services which are analog and those which are digital. The analog services are based on electromagnetic waves that vary in their frequency. I am sure you have heard of the term FM, which is short for frequency modulation. Also, analogue transmissions can vary in intensity. In the latter case, the process is called amplitude modulation, or AM.

But digital signals are a different story entirely. And yes, we have entered in the digital age, where everything is made up from many 0s and 1s. This is also how a digital signal is broadcast, in a series of binary digits called bits. 1 means on, 0 means off, and this is how information is actually transmitted to the computer circuitry.

When speaking about the costs of an analog satellite tv receiver, it depends on the number of features offered (as every other electronic product). There are some low cost receivers which equal the high priced items in quality. However, there is a downside. And the downside is the fact that the operator must remember all the adjustments that need to be made and execute them, with each satellite tv broadcast.

However, since we are in the digital era, there are dozens of digital satellite tv services which are emerging all over the place. And their number will only increase in the following years, there is absolutely no doubt about that. The question of MPEG compliancy is a very debatable issue though.

And another difference from the analogue services is the fact that digital services are usually a part of a big package, which consists in a wide array of channel options. This is because digital compression makes combining more channels in a single digital stream possible. This is how “bouquets” are created, and these packages have a great appeal to people who always want “all in one”. Having multiple channels in a single package is very convenient, as more and more types of tv stations emerge all over the world. These stations are very specialized. If you want to want sports, entertainment, or everything else and from over the world, there never has been a better time for that with the help of digital satellite tv.

Originally published here.

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