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" The Good Housekeeping Research Institute evaluated 3-D televisions for:  High definition picture quality   Standard definition picture quality  3-D picture quality  Evaluation of black levels, white levels, and color levels  Performance of the 3-D glasses  Video resolution and film resolution, which differ in how much adjustment the television must make in order to produce a good quality picture.  Sound level and sound clarity  Ease of setup and comfort of the 3-D glasses  Ease of using the remote control  Ease of navigating the menus and settings  Additional features ease of use  How We Tested  Using calibration software, we calibrated black levels, white levels, and color. We then compared them to factory settings and determined how much adjustment the televisions would require when you set it up at home.  We used test patterns to evaluate the performance of the video processors of each television for both video resolution loss and film resolution loss.  Once each of the settings were calibrated, we assessed the picture quality of both high definition content and standard definition content for dark scenes and bright scenes using various Bluray Discs and DVDs.  Using 3-D Bluray discs we evaluated the quality of the 3-D content of both dark scenes and bright scenes.  Each television was viewed from various viewing angles to determine how much the picture quality was affected, simulating a person sitting to the far left or right of the television.  GHRI inspected the glasses and evaluated the performance of the active shutter glasses while watching 3-D content.  We measured the highest sound level the television was able to produce and determined the level of sound clarity at that level.  We evaluated the ease of use of the remote control as well as the navigation of menus and setting. We also rated the ease of switching between inputs to determine how easy it would be to switch from your cable/satellite source to a DVD player.  We evaluated many of the additional features of the televisions, such as picture-in-picture, internet connectivity, closed captioning and determined how easy and appealing they were to use.  Testers tried on and evaluated the comfort of the 3-D glasses as well as the 3-D quality while they watched 3-D content.    3-D glasses have infrared (IR) sensors that allow them to connect wirelessly to your television or display. As the 3-D content appears on the screen, the picture alternates between two sets of the same image. The two sets are offset from one another aren&amp;#039;t shown at the same time \u2014 they turn on and off at an incredible rate of speed.   The LCD lenses in the glasses alternate between being transparent and opaque as the images alternate on the screen. The left eye blacks out when the right eye&amp;#039;s image appears on television and vice versa. This happens so fast that your mind cannot detect the flickering lenses. But because it&amp;#039;s timed exactly with what&amp;#039;s on the screen, each eye sees only one set of the dual images you&amp;#039;d see if you weren&amp;#039;t wearing the glasses. In fact, if you were to look at the screen without wearing the glasses, it would appear as if there were two sets of images at the same time  For several years, LCD and plasma screens weren&amp;#039;t good candidates for this kind of technique. The refresh rates \u2014 the speed at which a television replaces the image on the screen \u2014 were too low for the technology to work without the viewer detecting a flicker from the glasses. But now you can find plasma and LCD displays with fast enough refresh rates to handle the 3-D content. Even if you have a 3-D-ready television, an emitter and a pair of active glasses, not everything on your television will appear to be three dimensional. Content providers must optimize the signal for 3-D first. "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.goodhousekeeping.com/electronics/hdtv-reviews/a18781/3d-tvs-tested/?src=shelter_footer>