TY - JOUR KW - Ontologies KW - Decision-level KW - (6517) KW - Adaptability KW - MPEG AU - Fernando Carlos López Hernández AU - José Martínez AU - Narciso García AB - This paper presents the progress and final state of CAIN-21, an extensible and metadata driven multimedia adaptation in the MPEG-21 framework. CAIN-21 facilitates the integration of pluggable multimedia adaptation tools, automatically chooses the chain of adaptations to perform and manages its execution. To drive the adaptation, it uses the description tools and implied ontology established by MPEG-21. The paper not only describes the evolution and latest version of CAIN-21, but also identifies limitations and ambiguities in the description capabilities of MPEG-21. Therefore, it proposes some extensions to the MPEG-21 description schema for removing these problems. Finally, the pros and cons of CAIN-21 with respect to other multimedia adaptation engines are discussed. IS - Regular Issue M1 - 4 N2 - This paper presents the progress and final state of CAIN-21, an extensible and metadata driven multimedia adaptation in the MPEG-21 framework. CAIN-21 facilitates the integration of pluggable multimedia adaptation tools, automatically chooses the chain of adaptations to perform and manages its execution. To drive the adaptation, it uses the description tools and implied ontology established by MPEG-21. The paper not only describes the evolution and latest version of CAIN-21, but also identifies limitations and ambiguities in the description capabilities of MPEG-21. Therefore, it proposes some extensions to the MPEG-21 description schema for removing these problems. Finally, the pros and cons of CAIN-21 with respect to other multimedia adaptation engines are discussed. PY - 2013 SP - 7 EP - 24 T2 - International Journal of Interactive Multimedia and Artificial Intelligence TI - CAIN-21: Automatic adaptation decisions and extensibility in an MPEG-21 adaptation engine UR - http://www.ijimai.org/journal/sites/default/files/files/2013/10/ijimai20132_4_1_pdf_14413.pdf VL - 2 SN - 1989-1660 ER -