Extensible MPEG-4 Textual Format: Difference between revisions

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The '''Extensible MPEG-4 Textual Format''' (XMT) is a high-level, [[XML]]-based [[file format]] for storing [[MPEG-4]] data in a way suitable for further editing. In contrast, the more common [[MPEG-4 Part 14]] ([[MP4]]) format is less flexible and used for distributing finished content.

It was developed by [[MPEG]] ([[ISO/IEC JTC 1]]/SC29/WG11) and defined in [[MPEG-4 Part 11]] ''Scene description and application engine'' (ISO/IEC 14496-11).<ref name="mpeg4-part11">{{cite web | url=http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=38560 | title=ISO/IEC 14496-11:2005 - Information technology -- Coding of audio-visual objects -- Part 11: Scene description and application engine | author=ISO | publisher=ISO | accessdate=2009-10-30}}</ref>

XMT provides a textual representation of the MPEG-4 binary composition technology, based on XML. The XMT framework accommodates substantial portions of [[Synchronized Multimedia Integration Language|SMIL]], W3C [[Scalable Vector Graphics]] (SVG) and [[X3D]] (the new name of VRML). Such a representation can be directly played back by a SMIL or VRML player, but can also be binarised to become a native MPEG-4 representation that can be played by an MPEG-4 player. Another bridge has been created with [[BiM]] (Binary MPEG format for XML).<ref>{{cite web | url=http://ride.chiariglione.org/bits_and_bytes/bits_and_bytes.htm | title=Riding the media bits - Bits and bytes | author=Leonardo Chiariglione |date=2005-03-08 | accessdate=2009-10-30}}</ref>

XMT provides a textual representation of the MPEG-4 binary composition technology, based on XML. The XMT framework accommodates substantial portions of [[Synchronized Multimedia Integration Language|SMIL]], W3C [[Scalable Vector Graphics]] (SVG) and [[X3D]] (the new name of VRML). Such a representation can be directly played back by a SMIL or VRML player, but can also be binarised to become a native MPEG-4 representation that can be played by an MPEG-4 player. Another bridge has been created with [[BiM]] (Binary MPEG format for XML).<ref>{{cite web | url=http://ride.chiariglione.org/bits_and_bytes/bits_and_bytes.htm | title=Riding the media bits - Bits and bytes | author=Leonardo Chiariglione | date=2005-03-08 | accessdate=2009-10-30 | url-status=dead | archiveurl=https://web.archive.org/web/20100925220237/http://ride.chiariglione.org/bits_and_bytes/bits_and_bytes.htm | archivedate=2010-09-25 }}</ref>

==See also==

*[[MPEG-4 Part 11]]

==References==

{{reflistReflist}}

==External links==

* [http://www.digitalpreservation.gov/formats/fdd/fdd000156.shtml MPEG-4, eXtensible MPEG-4 Textual Format (XMT)] - Library of Congress

* [http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=38560 ISO/IEC 14496-11:2005 - Information technology -- Coding of audio-visual objects -- Part 11: Scene description and application engine]

* [http://www.research.ibm.com/mpeg4/Projects/XMTInterop.htm XMT: MPEG-4 Textual Format for Cross-Standard Interoperability] by IBM

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[[Category:Computer file formats]]

[[Category:MPEG-4]]

[[Category:XML-based standards]]