The Extensible MPEG-4 Textual Format (XMT) is a high-level,

XML Extensible Markup Language (XML) is a markup language and file format for storing, transmitting, and reconstructing arbitrary data. It defines a set of rules for encoding documents in a format that is both human-readable and machine-readable. ...

-based

file format A file format is a Computer standard, standard way that information is encoded for storage in a computer file. It specifies how bits are used to encode information in a digital storage medium. File formats may be either proprietary format, pr ...

for storing

MPEG-4 MPEG-4 is a group of international standards for the compression of digital audio and visual data, multimedia systems, and file storage formats. It was originally introduced in late 1998 as a group of audio and video coding formats and related ...

data in a way suitable for further editing. In contrast, the more common

MPEG-4 Part 14 MPEG-4 Part 14 or MP4 is a digital multimedia container format most commonly used to store video and audio, but it can also be used to store other data such as subtitles and still images. Like most modern container formats, it allows stream ...

( MP4) format is less flexible and used for distributing finished content. It was developed by

MPEG The Moving Picture Experts Group (MPEG) is an alliance of working groups established jointly by ISO and IEC that sets standards for media coding, including compression coding of audio, video, graphics, and genomic data; and transmission and fi ...

(

ISO/IEC JTC 1 ISO/IEC JTC 1, entitled "Information technology", is a joint technical committee (JTC) of the International Organization for Standardization (ISO) and the International Electrotechnical Commission (IEC). Its purpose is to develop, maintain and pr ...

/SC29/WG11) and defined in

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. It defines: * the coded representation of the spatio-temporal positioning of audio-visual obj ...

''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 Scalable Vector Graphics (SVG) is an XML-based vector image format for defining two-dimensional graphics, having support for interactivity and animation. The SVG specification is an open standard developed by the World Wide Web Consortium sin ...

(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).

References

External links

MPEG-4, eXtensible MPEG-4 Textual Format (XMT)
- Library of Congress

* ttp://www.research.ibm.com/mpeg4/Projects/XMTInterop.htm XMT: MPEG-4 Textual Format for Cross-Standard Interoperabilityby IBM Computer file formats MPEG-4 XML-based standards {{Markup-languages-stub

See also

References

External links