6 Tips nak beli HDTV

Ini antara tips-tips yang aku gunakan masa nak beli Toshiba Regza 40 inci aku :-

1. How big is your room?

Don't leave your home without figuring out where you're going to put your new HDTV. Measure the space, especially if you plan on putting the set in an existing media cabinet. Once you're surrounded by dozens of big-screen TVs in a store, it can be easy to lose perspective and end up with something that seemed reasonable next to its peers but dominates the space in your home.

2. How does aspect ratio affect screen size?

Aspect ratio refers to the proportion of screen width to height. High-definition televisions use a widescreen, rectangular 16:9 aspect ratio. Standard-definition TVs use a square 4:3 aspect ratio. Since screen sizes are measured diagonally (from the lower left corner to the upper right corner, for example), the diagonal measurement is shallower on a widescreen model. So, a 27-inch HDTV won't be as tall as a 27-inch standard-definition TV. You would need a 32-inch HDTV to match that height. As a rule of thumb, add five or six inches to standard TV sizes to find the equivalent HDTV size.

3. What HDTV technology is right for you?

There are currently three major HD display types:

Conventional LCD TVs are the most popular HDTVs right now, offering thin, lightweight, energy-efficient flat-panels at fairly reasonable prices.

LED-Backlit LCD TVs are the big HDTV trend this year. Sometimes marketed as LED TVs, these are actually thinner, more efficient LCD TVs backlit with light-emitting diodes (rather than fluorescent lamps). The technology allows for a brighter, more striking picture than conventional LCDs.

Plasma TVs offer excellent value. They're far cheaper and offer a better picture than conventional LCDs, though they are extremely heavy and relatively energy-inefficient.

4. What resolution do you need?

These days, most HDTVs come with either 720p or 1080p resolution. The numbers refer to the horizontal lines of pixels on the screen. The "p" stands for "progressive scan," which means that the TV draws every line every time it refreshes the picture. This results in a smoother picture than "interlacing" technology allowed for.

Although 1080p is the highest-quality HD resolution, those extra pixels effectively go to waste on screens under 40 inches in diameter. For those smaller sets, 720p provides excellent resolution. However, 1080p is essential on big-screen TVs, as they require more pixels to present the image clearly.

5. Does 120Hz matter?

Manufacturers and retailers are heavily promoting TVs with refresh rates of 120Hz or even 240Hz this year. Refresh rates indicate the frequency at which the picture is drawn on the screen. Higher rates draw the picture faster, reducing any motion blurring that occurs in fast-moving video (like sports).

Is this essential? Not really. If you're a true videophile that desires pristine images, then maybe the extra investment is worth your money. The average consumer and TV watcher won't notice a huge difference between 120Hz sets and TVs with lower refresh rates--and even experts have trouble discerning he difference between 120Hz and 240Hz.

6. What's a contrast ratio?

The contrast ratio is a measure of how well an HDTV displays the color black. Unfortunately, there is no industry standard for this term. Each manufacturer's definition can vary wildly from the next, so this specification is only useful when comparing models by the same manufacturer. In general, plasmas offer the best contrast, followed by LED-backlit LCDs, followed by conventional LCDs.

7. Are Internet-ready TVs worth the extra cost?

Since most HDTVs offer excellent picture quality by any standards, manufacturers now offer models with bells and whistles attached, like built-in Internet access via Ethernet or even wi-fi. These sets allow direct video streaming from services like Netflix. Some even support widgets for Facebook, Twitter, Flickr and the like. These features are all definitely cool, but it's probably worth waiting a while for this concept--and the infrastructure behind it--to mature. If you are going to buy this year, Vizio and LG offer the best Web services so far.

Kredit kepada Liam McCabe


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