How to Install a Home Theater - Progressive and Interlaced
Hi, it’s Keith Harmon from with Smart Wired Home and we’re back to talk about selecting the correct television screen for your home theater. So when we start to look at screens, we’re immediately looking at high definition screens. Basically, don’t even want to conspit at this point in 2007, you’re not considering any standard definition TVs. Most people will be looking at either a high definition either a flat panel or perhaps a rear projection or front projection screen. We’ll talk about some of the differences there but first we’re gonna talk about the differences in resolutions. So when we say standard definition TV, what does that mean? Well, we’re talking about lines of resolution. So when we have the existing standard broadcast that all the stations are using, non high def broadcast 330 lines of resolution, we’re talking about. Now you move from that to a DVD and you jump from 330 lines to 480 lines. Now you’ve got more resolution, more detail, you can usually tell the difference when you’re playing a DVD versus watching a broadcast. That 480 lines resolution is also the same resolution that you’ll get from a digital television broadcast, which is really only available from your cable company. You can also get that over the air to some extent although if they’re doing digital TV, they’re pretty much broadcasting in HD TV. Now, when we look at high definition television, that means 720 lines or up to 1,080 lines of resolution. So we’re really talking about a significant jump in the resolution from the old DVD and really from the old TV broadcast. Now, when you’re looking at the resolution, there’s always a little letter after, you see an I or P and you probably already noticed that which is interlaced or progressive. So what does that mean? Well, first of all, you got the lines there but how are those lines refreshed. They refreshed usually up to 60 times every second so that’s really fast, faster than your eye can recognize. So that’s why you can, that’s why the pictures appear to be moving all the time because they’re flashing so quickly. But how are, when you look at the interlaced, that’s where we first gonna look at, every other line is refreshed each time you refresh the cycle. So, first one then the other, goes back and forth. So that keeps the processor a little less tax, so it’s easier for the equipment manufacturers to do interlaced than it is progressive because they have to do twice amount or you have twice amount of processing depending on which way you wanna look at it. Then when we look at progressive, progressive is gonna take all the lines and refresh them each time. So you start to see this kind of refresh. So everything’s just a little bit smoother because all the lines are being refreshed at the same time instead of alternating back and forth. Next, we’re gonna talk about the different kinds of technologies that are available first one being the flat panel, flat panel looking at both the LCD and the plasma. And we’re gonna take a look at a plasma that’s mounted on the wall so it will give you an idea on how that would look.