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0.8 H. This table can be used in a number of ways : Find the optimal distance for a given screen. Example: for a 4K UHD screen 140 cm high (112 inches diagonal), the optimal distance is 140 × 1.6 = 224 cm. Find the right screen size. Example: for a 1080 HDTV used at a distance of 250 cm, you need to find a screen whose height is close to ...
The Lechner Distance chart illustrates the optimal viewing distances at which the human eye can best process the details an HDTV resolution has to offer. [6] For example, the optimal viewing distance for a 42 inches (110 cm) Full HD TV (1080p) is 5.5 feet (170 cm).
At this distance, the individual pixels cannot be resolved while simultaneously maximizing the viewing area. For more TV resolutions, see "The optimal viewing distance". [3] [4] The TV image is composed of many lines of pixels. Ideally, the TV watcher sits far enough away from the screen that the individual lines merge into one solid image.
A good rule of thumb is that your viewing distance should be about 1.5 to 2.5 times the TV's diagonal measurement. For a 50-inch TV, this means sitting between 75 and 125 inches away.
As the display size increases so does the ideal viewing distance. Bernard J. Lechner, while working for RCA, studied the best viewing distances for various conditions and derived the so-called Lechner distance. As a rule of thumb, the viewing distance should be roughly two to three times the screen size for standard definition (SD) displays.
The TABLE 1-1 : Image system Reference Aspect ratio Pixel aspect ratio Optimal horizontal viewing angle Optimal viewing distance. 720 × 483 ITU-R BT.601 4:3 0.89 11° 7H. 640 x 480 VGA 4:3 1 11° 7H. 720 × 576 ITU-R BT.601 4:3 1.07 13° 6 H. 1024 x 768 XGA 4:3 1 17° 4.5 H. 1280 x 720 ITU-R BT.1543 16:9 1 21° 4.8 H.
Test cards typically contain a set of patterns to enable television cameras and receivers to be adjusted to show the picture correctly (see SMPTE color bars).Most modern test cards include a set of calibrated color bars which will produce a characteristic pattern of "dot landings" on a vectorscope, allowing chroma and tint to be precisely adjusted between generations of videotape or network feeds.
In fact, a 1920 x 1080 pixel resolution UI has a size in space that varies with the size of the TV set. This is why, in television, distance is expressed in picture heights (H) and not in metres (or feet). [8] Furthermore, this 10-foot distance does not correspond to the optimal viewing distance or the Lechner distance (3.2 H for 1080 HD ...