Our brains assimilate all the colors – quickly making the image into the picture that we see. Tiny little cubes, called pixels combine to make the picture. The right amount of pixels gives us clarity of the images we perceive. If you’re reading the specs on a television, lap top, desktop or cell phone and wondering what exactly those highly technical-sounding words mean, here’s a quick break down:
The more pixels we have, the better
Pixels, short for ‘picture elements’ fit together to create the image – the more the better. Ppi stands for pixels per inch. They consist of tiny square or rectangular liquid crystal display blocks. LCD (liquid crystal display), plasma and DLP (digital light processing) devices are considered ‘fixed-pixel’ displays because they are preset. You’ll notice that cameras are clearly marked with the amount of pixels because this is a big selling point. Without enough pixels in our pictures they’ll appear grainy and the colors will be uneven. The picture is made up of many little dots, for an example, a resolution of 640 x 840 contains 307,200 ‘dots’. For those who want to take their photo and blow it up into a poster, at least 7 megapixels is recommended. Pixels, being a large selling point also figure into the cost.
Native Resolution refers to the best quality image that a particular television is capable of displaying. So every image producing screen has its limits. These break down into the three standards of resolution that follow.
The higher the resolution in the product, the higher the cost
Resolution is made up of pixels. Naturally, lower resolution costs less and higher resolution costs more – sometimes much more. A television labeled ‘digital’ does not necessarily mean that it is capable of producing a high-definition picture. The values now in the digital television industry consist of three standards of resolution:
- Standard (SDTV)
- Enhanced (EDTV)
- High (HDTV)
Do not be misled by the word ‘digital’ on the label. You’d be better off looking for 1080i and HDTV, which are ultimate viewing.
Standard definition –
Our television system has undergone many changes – once being analog, they’re now becoming all digital. Standard definition consists of 480 interlaced horizontal lines or 480i which are stacked from the top to the bottom of the picture. Because it actually has 240 alternating fields woven into the image it’s considered ‘interlaced’. The image lines are scanned every 1/60th of a second creating the fluidity of what we view.
Enhanced Definition –
A DVD’s images can be viewed in either 480i or 480 progressively scanned lines. A progressively scanned line is used to give a more fluid appearance without scanned lines, and is also referred to as 480p. This is still not quite HDTV but can come across with a pretty decent picture. It can display 852 x 480 resolution, or 852 pixels across and 480 from top to bottom.
To view high-definition television in all its remarkable detail requires a television with LCD, plasma or DLP (digital light processing) device with a native resolution of either 1080i which breaks down to 1920 pixels across, interlaced with 1080 or 1280 X 720. The 1280 by 720 means 720 lines progressively scanned with a widescreen 16:9 aspect ratio. HDTV will quickly spoil you, and you will not want to settle for less.
So now you’ve got the pertinent information you need on those still and moving images tech terms you hear thrown around in your circles! You’re informed and know just what you need to get, for the results you want to achieve.
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