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 ‘Definition Television’
Extremely Large And Extremely Small Televisions
December 17th, 2009For the last 5 or 6 years the media (and therefore also the public) has focused either the huge television sets or the extremely small televisions that can be carried around in your pocket. On the tiny end of the scale you have the portable players with 2-4 inch screens that can pack enormous amounts of video into a piece of hardware the size of a wallet or even a credit card. On the other end of the spectrum there are the large HDTVs where anything smaller than 42 inches isn’t even worth talking or writing about if you ask much of the popular media. You are sometimes left wondering if there’s still anything in between these two extremes – while both of these types of technology are impressive nonetheless. Finding a normal television with a 4:3 aspect ratio in a similar size between twenty to thirty inches is actually becoming more and more difficult. That is unless you are then compensation by going for digital televisions like LCD screens or plasma screens. The most significant difference between the TV’s that are available today and those that were available ten years ago is the fact that modern standard definition television sets typically have digital tuners built in. The TV manufacturers are preparing for the change to digital television (planned for 2009) even though it’s unclear whether or not it will actually happen on schedule. There is a bigger question than whether or not standard TV sets are still available. There are many arguments against investing in a standard definition television right now and the most obvious argument against getting one is the fact that more and more TV shows are being produced in the HDTV format. Secondly many TV distributors are preparing to offer more HDTV channels over the next couple of years. As the popularity and availability of HDTV programming increases, we are likely to see a great (and expanding) effect in the number of TV channels and TV shows that will change to High Definition Television. The more channels and programs that make the switch, the more people will watch the programs on these channels and the public will begin to ask questions why the rest of the channels haven’t also made the switch to HDTV and will put pressure on them to do so. This is not to say that standard definition TV will be nonexistent in the future. But it is more likely that the TV programs and shows that are produced in the High Def format will be “down converted” to standard definition format and be shown on standard definition television channels, at least for some years to come. This is actually already happening to some extent as it was seen in the most recent Star Trek series which was shot in high definition. Because this was still a very popular show for people to watch on normal standard definition channels and while it originally aired in standard definition a lot of its fans probably didn’t even realize that it had actually been shot in HD. This brings us to another of the many advantages of HDTV sets – Even if you are not watching HDTV on it, there’s an increasing trend to broadcast normal television shows in the wide screen format that looks good on HDTV screens.
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
