The Collaboration Surfaces project

Distributed Multimedia Plays (DMP) Collaboration surfaces are essential parts of the DMP three-layer systems architecture. DMP provides near-natural virtual networked auto-stereoscopic continuous (multi-) view video and multichannel sound collaboration between users (and users and servers) [RON07a]. The end-to-end maximum time delay is guaranteed (< 10-30 ms) by allowing the quality of audio-visual content and the scene composition vary with time and traffic. The adaptation scheme is called Quality Shaping. The scheme uses traffic classes, controlled dropping of packets, traffic measurements, forecasting of traffic and feedback control. Adaptive parameters are the maximum end-to-end delay, the number of 3D scene sub-objects, object temporal and spatial resolution, sub-object adaptive and scalable compression, and the number of spatial views. The scheme also includes scene object behavior analysis. The architecture supports pertinent security and graceful degradation of quality. The architecture introduces independent parallelism by definition. The most basic critical part of DMP, the regeneration of objects from sub-objects by interpolation when sub-objects are dropped in the network, has been extensively tested. Very good interpolation and segmentation methods has been developed and presented in a number of Master’s theses and PhD papers at the Dept. of telematics, e.g., [JEN10], [PAN10], [TAM10].