Now that you've bought an HDTV, make sure you hook it up correctly.
Ah, the golden age of television. The only thing I loved more than Lucy was the solitary input on the back of my TV. It was a simpler time. Now we must choose between 300 channels and only slightly fewer inputs. Add HDTV to the mix, with all of its inherent confusion, and it's a recipe for connection disaster.
The most frequently asked questions I've received this year have been about the difference between 1080i and 1080p. Many people felt—or others erroneously told them—that their brand-new 1080p TVs were actually 1080i, as that was the highest resolution they could accept on any input. I did a blog post on this topic and received excellent questions, which I followed up on. It is an important enough question—and one that creates a significant amount of confusion—that I felt I should address it here, as well.
Earlier this year, we tested 54 2005 HDTV sets to learn how they process all the detail contained within 1080i high-definition signals. The results were disappointing. Slightly less than half of the models tested failed to properly deinterlace a 1080i high-definition signal, resulting in a loss of picture resolution. Thanks to our readers' response to dealers when shopping for high-definition TVs, a number of manufacturers took notice.
If there is one thing that just screams "future" to me, it's lasers. Sure, they've been around since the 1960s, but come on—it's lasers! Right now, they can be found in your CD and DVD players, but a few companies are hoping to put them in your TV, as well.
No matter what type of display you're looking for, you're no doubt going to be comparing the specs and feature lists of each. Things like contrast ratio, lumens, 3:2 pull down, and others are a marketing departments favorite tools to make their product sound better than another. Take many of these with a grain of salt. Take others as an undersold but vital aspect of a product. To sort though them, here's what they all mean.
Bulbs are so 20th century. You can gussy them up, charge a bunch of money for them, even call them fancy names (lamps), but the fact of the matter is, they're still basically light bulbs. Almost all new RPTVs and front projectors use UHP (ultrahigh pressure) lamps to create light. These lamps are fairly efficient for the light they put out but are very hot, costly, and don't last very long. One new technology that's aiming to replace the UHP monopoly is LED, or light-emitting diode.
It may not sound very exciting, but Advanced Super In-Plane Switching (AS-IPS) is a pretty neat technology. It is yet another improvement in the world of LCD, brought to you by Hitachi, as well as Panasonic and Toshiba.
The current top HDTV broadcast resolution is 1080i (interlaced). Most television and cable networks use it, including CBS, NBC, the WB, HBO, Showtime, HDNet, The Movie Channel, Starz HDTV, and others. What happens to this HDTV signal when one of the latest digital HDTVs processes it? Does it take the full 1,080 lines of transmitted resolution, change the signal from interlaced to progressive (called deinterlacing), detect and compensate for motion, and send it to the screen, as it should? Or does the display's processor cheat you out of seeing all the detail within the broadcast?
I'm sure many of you read over the measurement boxes in our video reviews, take what you need from them, and move on. But what does it all mean, really? Why do we do it the way we do? For those of you new to the magazine or video displays in general, what does any of it mean? These are excellent questions.
You know those little plastic plug thingies you put in electrical outlets so that kids don't stick their fingers and such into them? Turns out, they're there for a reason. My parents dutifully put these in all the outlets in our house, and, when I was just past the age where they figured I couldn't possibly be stupid enough to stick anything into an outlet, I found an innocent little piece of copper wire. At this point, you can see where this story is headed. Lacking any polyvinyl chloride polymer to impede my process, and always having an inquisitive mind, I inserted said wire into said outlet. The results were predictable. I believe vaporization was involved. Since then, I've had a healthy (ahem) respect for electricity.
MPEG-4 Advanced Video Coding (AVC) is a next-generation video codec (coder/decoder) that's about to change the face of digital television—slimming it down, enabling it to move into narrower channels, and probably changing how it looks. I can almost see your eyes glazing over: Lucy, you got some 'splainin' to do.
It's no secret that, if you have a new projection display (front or rear), you'll eventually need to replace its light source. Take one look at them, and you'll see that these aren't your ordinary 100-watt bulbs—that, and the fact that these light sources cost hundreds of dollars each.
In my GearWorks column in our January 2005 issue, I talked about how, depending on your viewing distance, the resolution of your display may not matter. To sum up, your eye has a finite resolution (like a digital camera), and, as objects get smaller with distance, there is a point where your eye can no longer distinguish between bigger and smaller pixels. Over long distances, this is obvious, but it surprised a lot of people that it could be so noticeable in shorter (in-room) distances.