Presentation Services in MADEUS: an Authoring Environment for - PDF document

See discussions, stats, and author profiles for this publication at: https://www.researchgate.net/publication/29622449 Presentation Services in MADEUS: an Authoring Environment for Multimedia Documents Article · January 1996 Source: OAI CITATIONS READS 2 15 3 authors , including: Loay Sabry Ismail Qatar University 31 PUBLICATIONS 344 CITATIONS SEE PROFILE Some of the authors of this publication are also working on these related projects: Structural Health monitoring using Wireless Sensor Networks View project IoT-Based Fire Alarm System View project All content following this page was uploaded by Loay Sabry Ismail on 07 January 2014. The user has requested enhancement of the downloaded file.

INSTITUT NATIONAL DE RECHERCHE EN INFORMATIQUE ET EN AUTOMA TIQUE Presentation Services in MADEUS: an Authoring Environment for Multimedia Documents Muriel Jourdan, Nabil Laya¨ ıda and Loay Sabry-Ismail N ˚ 2983 TH ` EME 3 apport � de recherche� � ISSN 0249-6399

Presen tation Services in MADEUS: an Authoring En vironmen t for Multimedia Do cumen ts Muriel Jourdan, Nabil La y a � �da and Loa y Sabry-Ismail Th � eme 3 | In teraction homme-m a c hine, images, donn � ees, connaissances Pro jet Op � era Rapp ort de rec herc he n�2983 | | 22 pages Abstract: The recen t adv ances in m ultim edia systems, together with the adv en t of high sp eed net w orks, pa v ed the w a y to a new generation of applications. In particular, authoring en vironmen ts ha v e found in m ultim edia the means of increasing the ric hness of information con tained in electronic do cumen ts. One of the goals of the Op era team is designing an authoring en vironmen t for m ulti- media do cumen ts, called MADEUS, whic h meets the follo wing requiremen ts: a high lev el of expressiv eness for b oth spatial and temp oral dimensions; a user-friendly in terface allo w- ing highly in teractiv e design pro cess, scriptless and structured-based editing and automatic pro duction of spatial and temp oral la y out; the p ortabilit y and cross-platform in terc hange of m ultimedia do cumen ts. T o ac hiev e this researc h goal w e �rst fo cus on �nding a go o d represen tation of time for m ultimedia do cumen ts. This represen tation is required to capture the temp oral dimension of media ob jects lik e video, audio, etc. and is also used to temp orally organize ob jects with resp ect to eac h other. Time represen tation is clearly the main di�erence b et w een m ultim edia authoring en vironmen t and traditional editing en vironmen ts. W e presen t in this pap er our �rst in v estigational results in our exp erimen tal authoring en vironmen t MADEUS. A large part of these results are based on the exp erience acquired in implemen ting the MADEUS protot yp e Key-w ords: authoring en vironmen t , time represen tation, time managemen t (R � esum e � : tsvp) Unit´ e de recherche INRIA Rhˆ one-Alpes 655, avenue de l’Europe, 38330 MONTBONNOT ST MARTIN (France) T´ el´ ephone : (33) 76 61 52 00 – T´ el´ ecopie : (33) 76 61 52 52

Services de pr � esen tation dans MADEUS : un en vironnemen t d' � edition- pr � esen tation de do cumen ts m ultim � edia R � esum e � : L'explosion des capacit � es de traitemen ts m ultim � edia des ordinateurs rend le b esoin en en vironnemen ts d' � edition de do cumen ts m ultim � edia de plus en plus �agran t. L'un des ob jectifs du pro jet Op � era est de concev oir un tel en vironnemen t qui concilie les trois exigences suiv an tes : un haut degr � e d'expressivit � e p our exprimer l'ordonnancemen t temp orel et l'organisation spatial d'un do cumen t; une in terface d' � edition in teractiv e et d � eclarativ e (pas d'utilisation de scripts), qui prenne en c harge les fonctions de formatage spatial et temp orel; un en vironnemen t p ortable et des do cumen ts p ouv an t etre utilis � es par d'autres applications. P our cela, nos e�orts on t tout d'ab ord p ort � e sur la d � e�nition d'une b onne repr � esen tation de la dimension temp orelle d'un do cumen t m ultim � edia. Celle-ci doit � a la fois prendre en compte les di� � eren tes carat � eristiques temp orelles des ob jets de base d'un do cumen t m ulti- m � edia et les di� � eren ts t yp es de comp osition p ossibles en tre ces ob jets. De plus, elle doit servir de supp ort � a des m � ecanismes de pr � esen tation e�caces. Nous pr � esen tons dans ce rapp ort nos premiers r � esultats. Une grande partie de ceux-ci on t � et � e exp � erimen t � es au sein du protot yp e MADEUS. Mots-cl � e : en vironnemen t d' � edition, do cumen ts m ultim � edia, pr � esen tation m ultim � edia

3 1 In tro duction The recen t adv ances in m ultim edia systems, together with the adv en t of high sp eed net w orks, pa v ed the w a y to a new generation of applications. In particular, authoring en vironmen ts ha v e found in m ultim edia the means of increasing the ric hness of information con tained in electronic do cumen ts. One of the goals of the Op era team is designing an authoring en vironmen t for m ultim edia do cumen ts, called MADEUS, whic h meets the follo wing requiremen ts: � a high lev el of expressiv eness for b oth spatial and temp oral dimensions; � a user-frien dl y in terface allo wing highly in teractiv e design pro cess, scriptless and structured-based editing and automatic pro duction of spatial and temp oral la y out; � the p ortabili t y and cross-platform in terc han ge of m ultimedia do cumen ts; T o ac hiev e this researc h goal w e �rst fo cus on �nding a go o d represen tation of time for m ultimedia do cumen ts. This represen tation is required to capture the temp oral dimension of media ob jects lik e video, audio, etc. and is also used to temp orally organize ob jects with resp ect to eac h other. Time represen tation is clearly the main di�erence b et w een m ultim edia authoring en vironmen t and traditional editing en vironmen ts. W e presen t in this pap er our �rst in v estigational results in our exp erimen tal authoring en vironmen t MADEUS. A large part of these results are based on the exp erience acquired in implemen ting the MADEUS protot yp e. More precisely , the �rst section is dev oted to the analysis of what are the requiremen ts for a go o d represen tation of time in m ultim edia do cumen ts. A t the end of this section, w e presen t the approac h used in MADEUS whic h is based on an extension of temp oral constrain t net w orks. In the second section, w e fo cus on the design and arc hitecture issues of the MADEUS application whic h handles b oth authoring and presen tation stages of m ultim edia do cumen ts. 2 Represen tation of time in m ultimedia do cumen ts 2.1 Time represen tation requiremen ts In order to measure the qualit y of a giv en time represen tation used to mo del the temp oral organization of m ultimedia do cumen ts and to ev aluate comparativ ely those used in di�eren t do cumen t systems [2 ][3 ][12 ], w e need to de�ne some criteria. In what follo ws, w e presen t k ey p oin ts that, in our opinion, a�ect signi�can tly the qualit y of the temp oral represen tation of m ultimedia do cumen ts. Expressiv eness The time represen tation m ust capture the di�eren t temp oral c haracte- ristics of basic ob jects . Media ob jects ma y b e static lik e text, still images, etc., or dynamic lik e video, audio, in teraction, etc. Dynamicit y is tak en here in the sense that these ob jects RR n�2983