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Frequently Asked Questions about HDTV
Why do I need a different TV?
HD signals are different than the analog signals used in standard televisions. You'll need an HDTV to display high definition's true resolution. Note that these new HDTVs are backwards compatible... you will still be able to receive all standard programming just like you get on your current TV.
What is HDTV?
High definition television is a digital format for broadcasting TV signals. The standard TV transmission broadcasts 480 lines of information at a time, while HDTV sends up to 1,080 lines. This leads to much better quality in the picture and coloring.
What is an aspect ratio?
Analog televison has an aspect ratio of 4 x 3, which basically refers to the rectangular nature of the picture... 4 units wide, 3 units high. The aspect ratio of HDTV is a widescreen 16 x 9, matching that of movie theater screens. That is why the HDTVs you see have a different shape relative to standard TVs. Note that HDTVs can be adjusted for different aspect ratios, so if you are watching a show that is in standard definition, you will still be able to watch it in the 4 x 3 format.
When will the transition to HDTV be complete?
The transition to digital signals from analog will continue over the next few years. By February 17, 2009, all signals are to be digital and broadcasters will return the old frequencies to the government. (This spectrum will be auctioned by the FCC beginning in early 2008. Some of it will go to emerging technologies, and some of it will improve the communication abilities of public safety agencies.) Note that there are several kinds of digital television, including (in order of quality): Standard Definition TV, Enhanced Definition TV, and true High Definition TV. While all signals should be digital by later this decade, the amount of programming actually broadcast in HDTV will only be a subset of this, probably determined by consumer demand for this level of quality.
How do locals work with HDTV and satellite TV?
2006 is the year that DIRECTV and Dish Network began to offer significant numbers of local channels over satellite, with more locations to be added this year. You'll be able to receive those HD locals, where available, with HD equipment and a subscription to the provider's local channel package. Alternately, you may be able to receive these channels over the air via an HD tuner in the HD satellite receiver you buy and an antenna attached to your HD satellite receiver.
What kind of antenna do I need and what local channels are available?
A listing of currently operational HD broadcast channels can be found at this FCC page. Note that the capture of HD signals via antenna are subject to the same issues as regular signals: Distance and topography can affect your ability to receive the signal. Note also that while some antennas are being marketed as best for picking up HD signals, the reality is that a decent set of "rabbit ears" with a 75 ohm. connection should do fine. We bought a $20 antenna, and it works great on our HDTV.
What is an HDTV monitor?
When shopping for an HDTV, you may notice that some TVs are HDTV monitors (sometimes called HD Ready), while others are full HD sets. A full HD set has a built-in decoder, and is all set to receive any local over-the-air HD signals with just the addtion of an antenna. The HD monitor, on the other hand, is kind of like your computer monitor, and will need additional equipment to receive television signals. In both cases, however, if you want satellite TV, you will need the satellite HD system, which will function as your HD converter for satellite signals. What this means is that if you are going to get HD satellite TV, you don't need to purchase a full-blown HD set... an HDTV monitor will do fine.
How do HDTV signals affect sound?
The digital signal of HDTV is integrated with 5-channel digital surround sound, providing the type of sound + picture experience you get with DVD players or in a theater itself. Note that a set of surround speakers is generally required to take full advantage of the home theater experience.
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