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Checking consistency in multimedia synchronization constraints

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2 Author(s)
Huadong Ma ; Sch. of Comput. Sci. & Technol., Beijing Univ. of Posts & Telecommun., China ; K. G. Shin

Constraint-based design is often used to correctly author a multimedia scenario due to its flexibility and efficiency. However, such a system must provide a mechanism with which users can easily manipulate the underlying structures to meet the application requirements. This paper proposes a novel method for analyzing multimedia synchronization constraints based on the constraint graph and classification, which is essential in developing efficient system support tools for constraint-based authoring systems. We specify temporal and spatial relations between multimedia objects, and use a directed graph to represent the constraints among the objects in a multimedia scenario. Moreover, we develop a method for analyzing temporal and spatial synchronization constraints based on graph theory, solving the problems of completeness checking, consistency checking, constraints relaxation and automatic spatio-temporal layout generation in a unified theoretical framework. We also discuss the effects of user interactive authoring. Compared with other methods, the proposed approach is simpler, more efficient, and easier to implement.

Published in:

IEEE Transactions on Multimedia  (Volume:6 ,  Issue: 4 )