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The Composite Media Group has had a significant influence in and provided major contributions
to the MPEG-4 standard. The following is a list of publications in which our group has contributed.
MPEG-4 Systems
ISO/IEC 14496-1, Information Technology - Coding of Audio-Visual Objects-Part 1: Systems
Amendment 2
"Flextime" |
Chair and editorship for this amendment. Flextime is IBM's technology specifying flexible temporal relationships
for application defined behavior in the presence of non-deterministic network delays. |
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Amendment 3
"XMT" |
Chair and editorship for this amendment. XMT-O is IBM's technology for specifying scenes for MPEG-4 in a high-level
XML-based representation to facilitate both machine generation and exchange of files preserving authors intentions.
This textual format can then be 'compiled' into the compressed MPEG-4 binary format for transmission/playback by
standard MPEG-4 devices. |
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Amendment 4
"Main2D Profile" |
Main2D is a device profile, proposed and supported by IBM, for MPEG-4 systems where the tools
selected were chosen to support Internet based applications. The profile includes IBM's Flextime technology. |
SMIL 2.0
W3C Synchronized Multimedia Integration Language 2.0
| SMIL 2.0 |
The Composite Media Group was part of the working group developing the SMIL 2.0 recommendation and
one of the editors. We were most active in the timing module where we added min and max attributes to
allow flexibility and bound the timing by defined limits. This added functionality to SMIL that was
commensurate with Flextime in MPEG-4.
The Synchronized Multimedia Integration Language 2.0
(SMIL 2.0) became a W3C Recommendation in August 2001.
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