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<title>SDTV</title>
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<h2 class="pHeading2">
SDTV
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SDTV 是&quot;标准清晰电视&quot;的缩写，与高清晰电视系统 (HDTV) 相比，标准清晰电视可以识别较低的分辨率系统。SDTV 系统和普通模拟电视一样，使用相同的 4:3 纵横比和 480 个扫描行产生图像，而数字解码提高了信号质量，显示的图像更加清晰和鲜明。SDTV 广播采用隔行扫描 (480i) 或 逐行扫描 (480p)，后者可提供更好的整体图像质量。
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