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MPEG-7
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{{Short description|Video encoding standard}} '''MPEG-7''' is a [[multimedia]] [[Content (media and publishing)|content]] description [[standardization|standard]]. It was standardized in [[International Organization for Standardization|ISO]]/[[International Electrotechnical Commission|IEC]] 15938 (Multimedia content description interface).<ref>{{cite web | url=https://www.iso.org/standard/34228.html | title=ISO/IEC 15938-1:2002 - Information technology -- Multimedia content description interface -- Part 1: Systems | author=ISO | access-date=2009-10-31}}</ref><ref>{{cite web|url=http://mpeg.chiariglione.org/achievements.htm |title=About MPEG - Achievements |author=MPEG |publisher=chiariglione.org |access-date=2009-10-31 |url-status=dead |archive-url=https://web.archive.org/web/20080708183405/http://mpeg.chiariglione.org/achievements.htm |archive-date=July 8, 2008 }}</ref><ref>{{cite web|url=http://mpeg.chiariglione.org/terms_of_reference.htm |title=Terms of Reference |author=MPEG |publisher=chiariglione.org |access-date=2009-10-31 |url-status=dead |archive-url=https://web.archive.org/web/20100221015538/http://mpeg.chiariglione.org/terms_of_reference.htm |archive-date=February 21, 2010 }}</ref><ref name="mpeg-standards">{{cite web|url=http://mpeg.chiariglione.org/standards.htm |title=MPEG standards - Full list of standards developed or under development |author=MPEG |publisher=chiariglione.org |access-date=2009-10-31 |url-status=dead |archive-url=https://web.archive.org/web/20100420192552/http://mpeg.chiariglione.org/standards.htm |archive-date=April 20, 2010 }}</ref> This description will be associated with the content itself, to allow fast and efficient searching for material that is of interest to the user. MPEG-7 is formally called ''Multimedia Content Description Interface''. Thus, it is ''not'' a standard which deals with the actual encoding of moving pictures and audio, like [[MPEG-1]], [[MPEG-2]] and [[MPEG-4]]. It uses [[XML]] to store [[Metadata (computing)|metadata]], and can be attached to [[timecode]] in order to tag particular events, or [[synchronise]] [[lyrics]] to a [[song]], for example. It was designed to standardize: * a set of Description Schemes ("DS") and Descriptors ("D") * a language to specify these schemes, called the [[Description Definition Language]] ("DDL") * a scheme for coding the description The combination of [[MPEG-4]] and MPEG-7 has been sometimes referred to as [[MPEG-47]].<ref>{{cite web |url=http://www.networkdictionary.com/protocols/m.php |title=Complete Protocol dictionary, glossary and reference - M |author=NetworkDictionary |access-date=2009-12-26 |archive-url=https://web.archive.org/web/20100101222717/http://networkdictionary.com/protocols/m.php |archive-date=2010-01-01 |url-status=dead }}</ref>
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