INTERNATIONAL ORGANIZATION FOR STANDARDIZATION

ORGANISATION INTERNATIONALE NORMALISATION

ISO/IEC JTC 1/SC 29/WG 11

CODING OF MOVING PICTURES AND AUDIO

 ISO/IEC JTC 1/SC 29/WG 11/N8600
October 2006, Hangzhou, China 

Source:	Multimedia Description Schemes (MDS) Group
Title:	MPEG-21 Session mobility
Status:	Approved

 

Introduction

This document describes utility software integrating ISO/IEC 21000-2 [1], ISO/IEC 21000-7 [2], and ISO/IEC 21000-10 [3]. This utility software demonstrates how enhanced interoperability for session mobility can be achieved by combining those three parts of the MPEG-21 standard.

What does the integrated utility software for DID, DIA, and DIP specify?

By using the DIP approach, session mobility can be realized in an interoperable manner. Using DIP interoperability is achieved at different levels:

• Using DIP for session mobility makes sure that the DIP-enabled session mobility DI is usable on all DIP-enabled terminals. Therefore, interoperability at the session mobility application level is achieved.
• The standardized format for session mobility context DIs is used by the DIP solution. Hence, interoperability of the context data format is achieved.
• Since the application-specific data is inserted by the DIMs, interoperability of the application-specific data is achieved. This is a result of the fact that reading and writing of the data is under the control of the content author and not the application developer.
• The content author knows exactly how possible reconfiguration of the DI will be done because the behaviour of the J-DIXO, performing the reconfiguration, is known beforehand. Therefore, he is able to fine-tune the reconfiguration process that specific content DI to make optimal use of the content. Since the author also provides the J-DIXO performing the dynamic reconfiguration, the reconfiguration will behave exactly the same on each terminal. And thus, interoperability at the level of reconfiguration is achieved.

Relationship with other parts of MPEG-21

Conformance described in this document provides a link to two other parts of ISO/IEC 21000.

• ISO/IEC 21000-2:2005 [1].
• ISO/IEC 21000-7:2004 [2].
• ISO/IEC 21000-10:2006 [3].
• CD ISO/IEC 21000-8 [4].

 

Bibliography

[1]               ISO/IEC, Information Technology – Multimedia framework (MPEG-21) – Part 2: Digital Item Declaration (Second Edition), ISO/IEC TR 21000-2:2005, 2005.

[2]               ISO/IEC, Information Technology – Multimedia framework (MPEG-21) – Part 7: Digital Item Adaptation, ISO/IEC TR 21000-7:2004, October 2004.

[3]               ISO/IEC, Information Technology – Multimedia framework (MPEG-21) – Part 10: Digital Item Processing, ISO/IEC TR 21000-10:2006, January 2006.

[4]               Study of CD of ISO/IEC 21000-8 Reference Software, ISO/IEC JTC 1/SC 29/WG 11/N8572, October 2006, Hangzhou, China.