... SCTP Stream Control Transport Protocol 流控制传输协议 SD Standard Definition 标准清晰度 SDMA Space Division Multiple Access 空分多址 ...
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sd standard definition
Sd标准清晰度
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The 480p and 480i formats are called the SD (standard definition) formats, and 480i is roughly equivalent to a normal analog TV picture.
480i和480 p称为标清(standard definition sd)格式，480i的品质基本等同于模拟电视信号。
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Full HD (or Full High Definition) provides a resolution that is higher quality than that of HD (or High Definition) and substantially higher quality than that of SD (or standard definition).
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