Extensible MPEG-4 Textual Format
Encyclopedia
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 JTC1
/SC29/WG11) and defined in MPEG-4 Part 11
Scene description and application engine (ISO/IEC 14496-11).
XMT provides a textual representation of the MPEG-4 binary composition technology, based on XML. The XMT framework accommodates substantial portions of 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).
XML
Extensible Markup Language is a set of rules for encoding documents in machine-readable form. It is defined in the XML 1.0 Specification produced by the W3C, and several other related specifications, all gratis open standards....
-based file format
File format
A file format is a particular way that information is encoded for storage in a computer file.Since a disk drive, or indeed any computer storage, can store only bits, the computer must have some way of converting information to 0s and 1s and vice-versa. There are different kinds of formats for...
for storing MPEG-4
MPEG-4
MPEG-4 is a method of defining compression of audio and visual digital data. It was introduced in late 1998 and designated a standard for a group of audio and video coding formats and related technology agreed upon by the ISO/IEC Moving Picture Experts Group under the formal standard ISO/IEC...
data in a way suitable for further editing. In contrast, the more common MPEG-4 Part 14
MPEG-4 Part 14
MPEG-4 Part 14 or MP4 is a multimedia container format standard specified as a part of MPEG-4. It is most commonly used to store digital video and digital audio streams, especially those defined by MPEG, but can also be used to store other data such as subtitles and still images...
(MP4) format is less flexible and used for distributing finished content.
It was developed by MPEG (ISO/IEC JTC1
ISO/IEC JTC1
ISO/IEC JTC 1 is Joint Technical Committee 1 of the International Organization for Standardization and the International Electrotechnical Commission . It deals with all matters of information technology....
/SC29/WG11) and defined in MPEG-4 Part 11
MPEG-4 Part 11
MPEG-4 Part 11 Scene description and application engine was published as ISO/IEC 14496-11 in 2005. MPEG-4 Part 11 is also known as BIFS, XMT, MPEG-J...
Scene description and application engine (ISO/IEC 14496-11).
XMT provides a textual representation of the MPEG-4 binary composition technology, based on XML. The XMT framework accommodates substantial portions of SMIL
Synchronized Multimedia Integration Language
SMIL , the Synchronized Multimedia Integration Language, is a W3C recommended XML markup language for describing multimedia presentations. It defines markup for timing, layout, animations, visual transitions, and media embedding, among other things...
, W3C Scalable Vector Graphics
Scalable Vector Graphics
Scalable Vector Graphics is a family of specifications of an XML-based file format for describing two-dimensional vector graphics, both static and dynamic . The SVG specification is an open standard that has been under development by the World Wide Web Consortium since 1999.SVG images and their...
(SVG) and X3D
X3D
X3D is the ISO standard XML-based file format for representing 3D computer graphics, the successor to the Virtual Reality Modeling Language . X3D features extensions to VRML X3D is the ISO standard XML-based file format for representing 3D computer graphics, the successor to the Virtual Reality...
(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
BiM
BiM is an international standard defining a generic binary format for encoding XML documents.The technical specifications for BiM are found in: MPEG systems technologies - Part 1: Binary MPEG format for XML It is also known as MPEG-B Part 1.- Overview :BiM addresses a broad spectrum of...
(Binary MPEG format for XML).