Projector HDTV

This week, we ll talk about digital and High-Definition TV, and what these technologies offer us. First, let s talk a little about how regular TV works. Traditional TVs display an image on your screen by painting the picture one line at a time until all 480 lines are on the screen. These 480 lines are drawn in an alternating fashion, know as interlacing. This means that all the odd numbered lines are drawn so that exactly half the picture on the TV is displayed, then the even numbered lines are drawn in, giving you the whole picture. After one image is completely drawn, the whole process starts again. This happens 60 times per second, giving us the illusion

of motion. Interlacing allows our eyes to see the image as a whole otherwise we might actually see the TV image being drawn top to bottom. Since standard TV only shows us 480 lines drawn on the screen, the larger the TV screen the less crisp the picture. To see what I mean, the next time you are at an electronics store compare the same show on a 19″ TV and a 36″. See those lines that are visible in the 36″ screen? Those are the TV scan lines, 480 in total. All standard analog TVs have the same resolution, regardless of screen size. Also, standard TV has an aspect ratio of 4:3, meaning that for every one inch of width the screen is three inches high, making a TV screen almost square.

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If you are a TV lover and have spent any time at all walking past the displays of big screen TV’s in your local stores, I can fully understand what happens — your remote control finger starts to twitch, your rear end starts to long for that comfortable spot in your favorite recliner, and you have a sudden urge to take your shoes off. At least that’s what happens to me. I admit it, I am a TV junkie. Not that I spend a lot of time in front of the TV but when I am there, I require quality, and the more quality in video and audio, the happier I am.

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A Guide to AV Equipment Racks

It is true that you can place your audio and video system components almost anywhere, yet it is recommended that these systems are installed in a fixed dedicated enclosure, or component rack.

Keeping system components in an appropriate equipment rack will help you ensure the safety of your equipment, while making the system easy to access for service and future growth.

In its simplest form, inexpensive rack systems are merely a cabinet with shelves to take your AV equipment. Yet today’s rack mounting solutions have evolved far beyond the simple enclosure designed to stack your gear. Rather, the more elaborate and expensive racking solutions found in advanced home theater installations form a system

in itself; these include accessories for power distribution, thermal protection, and cable management.

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