- 480i
480i is the shorthand name for a video mode. The "i", which is sometimes uppercase, stands for "
interlaced ", the "480" for a vertical frame resolution of 480 lines. The digitally transmitted horizontal resolution is usually 720 or 704pixel s with an aspect ratio of 4:3 and therefore a display resolution of 640 × 480 (VGA); that isstandard-definition television (SDTV).The
field rate (not theframe rate ) is usually (60/100.1% ≈) 59.94hertz for color TV and can be rounded up to 60 Hz. There are several conventions for written shorthands for the combination of resolution and rate: 480i60, 480i/60 (EBU) and 480/60i. 480i is usually used in countries that conventionally useNTSC (North America, Japan), because the 525 transmitted lines at 60 hertz of analogue NTSC contain 480 visible ones.480i can be transported by all majordigital television formats, ATSC, DVB and ISDB. NTSCDVD s use 480i whenhigh motion is desired, but for movies 24 progressive frames per second (480p ) are used instead. The 480i resolution is used in most standard-definition TVs.See also
*
480p
*Enhanced-definition television (EDTV)References
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480i — es el nombre abreviado para un modo de vídeo, es decir, el sistema de televisión estadounidense NTSC o sistemas de televisión digital con las mismas características. La i, que a veces está en mayúscula, significa interlaced ( entrelazada en… … Wikipedia Español
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480i — Le 480i est une des définitions d écran utilisées par le format vidéo SDTV. Le terme 480i désigne une définition de 640×480 pixels. On parle de 480i60 lorsque l image a un taux de rafraichissement de 60 hertz). Le « i » signifie que la… … Wikipédia en Français
480i — PP A video mode with a resolution of either 720x480 or 704x480 pixels. The 480part refers to the number of horizontal lines and the i part refers to interlacing. This video mode is used in most standard definition televisions … Audio and video glossary
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