所谓标清,英文为“Standard Definition”,是物理分辨率在1280P*720P以下的一种视频格式,是指视频的垂直分辨率为720线逐行扫描。具体的说,是指分辨率在400线左右的VCD、DVD、电视节目等“标清”视频格式,即标准清晰度。而物理分辨率达到720p以上则称作为高清,(英文表述High Definition)简称HD。关于高清的标准,国际上公认的有两条:视频垂直分辨率超过720p或1080i;视频宽纵比为16:9。
虽然能在Fire上租借高清视频,但它本身只支持标清视频播放。
Though you can rent HD content on it, the Fire only supports standard definition video.
图象播放流畅,能够达到30fps,超过正常标清电视的25fps。
Images broadcast fluent, 30fps is able to reach more than normal standard definition TV 25fps.
高清电视并不像标清电视那样平常,但是如果这个榜单上其他的科技进步有所暗示的话,这将会改变。
HD television is still not quite as common as standard definition but if the other advancements on this list are any indication - that is about to change.
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