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ABSTRACT

We present a framework for multidimensional utility-driven adaptation for multi-stream video applications. A notable driving application is 3D tele-immersion. Our framework directly models the utility of video frames as well as representation dependencies that arise from differential encoding. The problem of evaluating past and future data utility in the presence of packet loss is specifically addressed and two possible approaches are described. One relies on reliability semantics of the underlying transport-level protocol in order to optimize encoding relationships. The other folds the decision to retransmit packets known to be lost into the utility framework. We quantitatively demonstrate the ability of both approaches to increase performance of a prototype application and show that the second approach is generally superior.

REFERENCES

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INDEX TERMS

Primary Classification:
  C. Computer Systems Organization
  C.2 COMPUTER-COMMUNICATION NETWORKS
      C.2.4 Distributed Systems
          Subjects: Distributed applications

General Terms:
Experimentation, Performance

Keywords:
multi-stream adaptation, utility-based adaptation