Ks. Candan et al., COLLABORATIVE MULTIMEDIA DOCUMENTS - AUTHORING AND PRESENTATION, International journal of intelligent systems, 13(12), 1998, pp. 1059-1111
Multimedia documents are composed of different data types such as vide
o, audio, text, and images. Authoring a multimedia document is a creat
ive exercise. Unlike traditional computer supported collaborative work
where documents are composed of static objects, multimedia documents
have temporal and spatial requirements that must be supported by any c
ollaborative multimedia platform. In this paper, we show that most req
uirements (including temporal and spatial) for collaborative multimedi
a authoring systems can be expressed in terms of a highly structured c
lass of linear constraints called prioritized difference constraints.
Based on our prioritized difference constraint-based characterization,
we develop efficient, incremental algorithms for creating and modifyi
ng multimedia documents so as to satisfy the required temporal and spa
tial constraints. We further develop methods to identify inconsistent
requirements, and show how such inconsistencies may be removed through
constraint relaxation techniques. We also report on the collaborative
heterogeneous interactive multimedia platform (CHIMP) system develope
d using the framework described. (C) 1998 John Wiley & Sons, Inc.