Resolution
Resolution – The sharpness or “crispness” of the picture. Resolution can be measured numerically by establishing the number of scanning lines used to create each frame of video. a) The number of bits (four, eight, ten, etc.) determines the resolution of the digital signal, 4-bits = a resolution of 1 in 16, 8-bits = a resolution of 1 in 256 (minimum for broadcast TV), 10-bits = a resolution of 1 in 1024. b) The basic measurement of how much information is on the screen. It is usually described as the number of pixels in the horizontal axis by the number of horizontal lines. The higher the numbers, the better the system’s resolution. Some typical resolutions are: NTSC VHS – 240 x 485, NTSC broadcast – 330 x 485, NTSC laserdisc – 425 x 485, ITU-R BT.601 (525/60) – 720 x 485, Computer screen – 1280 x 1024. c) The capability of making distinguishable individual parts of an image. A measure of how clear the picture looks. d) Perceivable detail. See also Chroma Resolution, Diagonal Resolution, Dynamic Resolution, Horizontal Resolution, Spatial Resolution, Static Resolution and Temporal Resolution. e) The amount of detail in an image. Higher resolution equals more detail. Generally expressed in “lines”. It is the number of vertical line pairs that the system can distinguish, and has no relationship to the number of horizontal scan lines.
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