Hartmut Wittig

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Resource management offers Quality-of-Service reliability for time-critical continuous-media applications. Currently existing resource management systems provide only means to reserve resources starting with the reservation attempt and lasting for an unspecified duration. However, for several applications such as video conferencing the ability to reserve(More)
Continuous media such as audio and video require a certain quality of service (QoS) when transferred through computer networks. The selection of a network route for a particular media stream should hence take into account which route is best-suited for providing this QoS. QoSFinder is a method for QoS-based routing of multimedia streams. It is based on a(More)
Digital and interactive TV systems will bring hundreds of TV program channels to the people. Then, the use of existing strategies for channel selection will fail: It is neither possible to select the program by " surfing " through the channels, nor by using printed program guides. This paper describes a new approach towards creation of a Personal Electronic(More)
Multimedia systems must be able to support a certain quality of service (QoS) to satisfy the stringent real-time performance requirements of their applications. HeiRAT, the Heidelberg Resource Administration Technique , is a comprehensive QoS management system that was designed and implemented in connection with a distributed multimedia platform for(More)
Due to the time characteristics of audio and video data, the processing of multimedia applications has to be done using real-time mechanisms. Scheduling algorithms used within such systems require information about the processing time requirements, the CPU utilization of the applications, to perform schedulability tests. Since multimedia applications are(More)