Menu
Home
People
Places
Arts
History
Plants & Animals
Science
Life & Culture
Technology
Reference.org
Standard-definition television
open-in-new
<p>Standard-definition television (SDTV; also standard definition or SD) is a television system that uses a resolution that is not considered to be either <a href="/facts/High-definition_television/AuE6FRFI">high</a> or <a href="/facts/Enhanced_definition/rPwFo5w3">enhanced definition</a>. <i>Standard</i> refers to offering a similar resolution to the <a href="/facts/Broadcast_television_systems/BT0FfFcy">analog broadcast systems</a> used when it was introduced. </p>