standard-definition television

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picture tube aspect ratios for SDTV and HDTV

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standard-definition television

electronics

Also known as: SDTV

Learn about this topic in these articles:

television image analysis

In television: Resolution
Standard-definition television (SDTV) is designed on the assumption that viewers in the typical home setting are located at a distance equal to six or seven times the height of the picture screen—on average some 3 metres (10 feet) away. Even high-definition television (HDTV) assumes a…
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