Computer Hardware Terms, Glossary and Dictionary

Standard-definition television (SDTV) refers to television systems that have a resolution that meets standards but not considered high definition. The term is usually used in reference to digital television, in particular when broadcasting at the same (or similar) resolution as analog systems. In ATSC, SDTV can be broadcast in 704 pixels × 480 lines with 16:9 aspect ratio (40:33 rectangular pixel), 704 pixels × 480 lines with 4:3 aspect ratio (10:11 rectangular pixel) or 640 pixels × 480 lines with 4:3 ratio (and square pixels). The refresh rate can be any of 24, 30 or 60 pictures per second.

Related Terms

SDTV: Standard-definition television