Everybody can see the difference between a good and a poorer picture quality. However, it is very hard to define for an average consumer what is picture quality. Contrast ratio is one very important element of picture quality, followed by color saturation and accuracy. Resolution should also be considered.
Contrast ratio is the ratio between the darkest and the brightest color your HDTV can produce. Obviously, the higher the contrast ratio is, the better your system is. Low contrast ratio means washed out pictures, dull images and lost details. In the recent years contrast ratio had been greatly improved. Best contrast ratios have a price premium, but technology is getting cheaper. At this time, even the low-end HDTV’s have decent contrast ratios.
Black levels are also very important: it can be very annoying to see grayish blacks when the user expects absolute black image. Poor black levels are especially visible in dim light conditions: this is when your eyes are very sensitive to dark images. To achieve absolute black, a lot of people set black levels too low: this is a mistake, because this way black shadow detail will be lost.
High white levels make images vivid and lively, and it is also makes daytime viewing more pleasant. Just as with the blacks, it is not a good idea to set the white levels too high, because details can be lost.
Color temperature, saturation and accuracy are also important elements of picture quality. The natural light temperature is 6500K, and this is the standard for setting the color temperature. Color temperature is below this will be yellowish or reddish, if above, will be bluish. Setting color temperature correctly is important because this can influence every color on your screen.
Color saturation can be relatively easily adjusted by using the color patterns that come with calibrations discs or TV channels. Color accuracy depends on how your HDTV decodes the image data. These are pretty complicated issues. You may want to read more about this elsewhere, but if you only want to stay at beginner-level, it is enough for you to know that the decoders of your system should match the color encoding used in film production.
Greyscale and display characteristic also affect the color reproduction of your HDTV, but again this is above the beginners knowledge about image calibration. You can choose to learn about this, or you can hire a specialist to do it for you.
The latest HD resolutions provide 5 times more pixel amount compared to Standard Definition. As a result, image is not simply clearer, but there is night and day difference: the smallest detail can be noticed on the image. If you want to have the best, go for 1080 capable HDTVs.
Another notion related to resolution is percieved sharpness. This is very similar to the concept of edge contrast used in photography, and it basically means that users have the choice to make the image borders crispier. This gives the sensation of better image quality with the same resolution.
Edward McKellen is an HDTV expert who writes HDTV reviews for HDTVreviewlab.com. To check out the latest Sharp HDTV reviews or learn more about HDTV televisions visit HDTVreviewlab.com
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