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720p - Wikipedia, the free encyclopedia
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日期：2024-04-29
720p (aka HD) is a progressive HDTV signal format with 720 horizontal lines and an aspect ratio (AR) of 16:9 (1.78:1). All major HDTV broadcasting standards (such as SMPTE 292M) include a 720p format which has a resolution of 1280x720; however, there are ...看更多
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