480i is a standard resolution in video technology, specifically referring to a display resolution of 720 x 480 pixels, with an interlaced refresh rate of 30 frames per second. This resolution is commonly used for standard definition television broadcasts and DVDs.
The "i" in 480i stands for interlaced, which means that the odd and even lines of pixels are displayed alternately, rather than simultaneously. This can sometimes result in a slight flickering effect or lower image quality compared to a progressive scan display.
480i is considered to be lower in quality compared to higher resolutions such as 720p or 1080p, but it is still widely used in many older televisions and broadcast systems. It is also the standard resolution for analog video signals and some video game consoles.
Overall, 480i provides a decent level of video quality for standard definition content, but may appear outdated or lower quality when compared to higher resolution formats.
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