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.
By: Digital Landing
Posts Tagged ‘Sdtv’
Some Hdtv Technologies are Better Than Others at Displaying Sdtv
October 8th, 2009Despite the growing popularity of HDTV and the rising sales of HDTV sets, most of the TV content that’s watched on HDTV sets is in standard definition television- the older format that’s been around since the dawn of broadcast TV more than half a century ago. There are two major reasons for this. The most obvious reason is that there are still far more standard def channels than there are HDTV channels. In other words, not everything that every HDTV owner wants to watch has made the transition to HD.
The second reason why most of the TV programming that’s watched on HDTV sets is still standard def is because HDTV programming isn’t nearly as popular as HDTV sets. The evidence for this includes the fact that there are only about half as many households with subscriptions to HDTV programming packages as there are households with HDTV sets. There are several reasons for this. For one thing, HDTV has become something of a status symbol and the HDTV sets are much more evident of this status than having the HDTV programming to watch on them is. Another reason is that HDTV sets have the wide screen aspect ratio that many DVD’s and an increasingly large number of standard definition TV shows are available in. The wider viewing area is a good way to heighten enjoyment of watching TV, and in many ways is more noticeable than the high resolution picture that you get with HDTV. Yet another reason is that modern video game systems like the Xbox 360 and Sony’s Play Station 3 can display their graphics in high def resolutions and take advantage of the 16:9 aspect ratio of HDTV sets.
Despite all of this, many people find standard definition programming relatively unsatisfying on HDTV sets. There are several reasons for this. For one thing, the analog format that a lot of standard definition TV still comes in, isn’t completely compatible with a lot of HDTV sets. This causes a worse picture in many ways than if the same programming was just displayed on a standard def screen. Another problem comes from the fact that HDTV screens are simply designed to display more pixels which result in a more detailed picture than you can get from a standard definition TV set or standard def programming. Therefore, the result of displaying standard def programming on such a high def screen is missing pixels which cause the picture to look grainy and generally low quality. This is especially obvious when standard def programming is displayed on a relatively large high def screen.
There is a way to combat this problem though- buy an HDTV set that’s good at rendering standard def programming. There are a variety of sets that are better than average at doing this and they’re made in a variety of technologies. DLP projection TV’s and Plasma screen TV’s can both be good at this, but there are more LCD screen HDTV sets on the market that are well rated for displaying standard def programming than any other type on the market. One thing that will help is getting an HDTV set with a built in up converter that will fill in the absent pixels to make the SD picture look sharper. Barring that, a smaller screen will look better because the gaps in the picture will be harder to see.
In all, this is a problem, but not one that can’t be avoided with a little bit of foresight.
By: Emily Sanderson
