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MULTIMEDIA SYSTEMS, DATABASES AND NETWORKING
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The multimedia data challenges researchers in compression, information retrieval, and transmission. The multimedia systems research do not only provide effective strategies for processing stand-alone media data, but also provides methodologies for the integration of strategies from video, audio, image, text, graphics, and other databases. The research interests of the faculty embrace video processing, multimedia databases, multimedia data modeling, multimedia information retrieval, multimedia networking, multimedia synchronization, and MPEG video standards.
FACULTY
 Dr. Ramazan Aygun
RESEARCH |
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 Multimedia Databases
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Although computer vision and image processing techniques improved significantly, the subjective user evaluation of video and image data as well as unsatisfactory object recognition methods made it necessary incorporation of fuzzy, uncertain, and imprecise data in multimedia databases. |
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| Multimedia Networking |
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The data whether stored in the database or not has to be transmitted over networks shared by many users. The congestion of the network and the compressed video data affect the quality of presentations drastically. Especially, the loss of a frame does not only affect the display of the frame, it also affects the display of the dependent frames. |
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| Video Processing |
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Most of the multimedia research is devoted on video. The video data challenges researchers in compression, information retrieval, and transmission and led many research areas. We have developed a novel video application to spatially browse recorded video data. The users are allowed to perform pan left and right, tilt up and down, and zoom in and out, if the necessary information can be extracted from various portions of the video. |
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| Interactive Multimedia Presentation Management |
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The user interactions are core elements of multimedia presentations. The loss and delay of the data over networks complicates the synchronization if user interactions that change the course of the presentations are enabled. The event-based or constraint-based synchronization models provide powerful mechanism to handle synchronization in distributed systems. |
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| Model Checking |
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One major question is whether the specified multimedia presentation is correct or not. A synchronization specification may yield different results on different presentation tools. It is important whether the presentation is actually played correctly by the synchronization model.
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