Susanne Naegele-Jackson

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BACKGROUND AND STUDY AIMS Real-time digital video transmission (rtDVT) at an acceptable quality through networks has been possible for several years. This technique can be used for telemedical applications, such as tele-endoscopy. The hypotheses of the present study were that the quality of real-time DVT depends on the technical equipment used, and that the(More)
With the continuous increase of network capacities, video transmissions in medicine are becoming an effective tool for second opinion diagnosis, archiving and teaching environments. This study investigates video compression delay times and transmission impairments for different compression formats and describes the resulting picture qualities. For the(More)
As multimedia applications are becoming more and more widespread there is a need for video data to be transmitted over IP as well as ATM networks. While ATM with its Quality of Service features is able to provide adequate transmission guarantees for the strong time and bandwidth constraints of video data, the transfer of video over IP networks is an issue(More)
This investigation provides performance measurements over layer 2 and layer 3 connections across the European testbed MUPBED, the German testbed VIOLA and the German Research Network X-WiN. The analysis first evaluates Quality of Service (QoS) parameters delay and jitter of layer 2 tunnels across both testbeds and includes an assessment of the jitter(More)
During the online edition of video material for television over data networks a major concern is the accumulation of delay over the production chain. Before a video signal of a camera arrives at a remote studio to be edited live, it travels over video adapters and analog/digital converters to codecs which in turn compress the signal to comply with small(More)
Zusammenfassung Multimedia-Anwendungen dringen zunehmend in den kommerziellen Bereich ein. Videodaten müssen daher nicht nur – wie bisher – über ATM-Strecken sondern auch über IP-Netzwerke übertragen werden. Beide Übertragungstechniken bieten für die interaktive Bildübertragung stark unterschiedliche Möglichkeiten, wobei ATM alle notwendigen Aspekte zur(More)