We do research on topics such as

• Internet telephony

• Spatial audio teleconferencing

• Ultra-low delay acoustic transmission over IP

• Multimodal location tracking and object identification

• Time of flight wireless positioning

• Future communication networks

Upcoming research will focus, for example, on

• New media services

• An audio layer for the future internet

• Movement tracking and communication

3D Telephony

The project „3D Telephony“ funded by HEC Pakistan and DAAD Germany aims at enhancing telephone systems by addition of  spatial sounds. We are developing a 3D Telephony System, which generates a virtual 3D acoustic environment in which each participant of a telephone call is placed at a unique position in the virtual world. The 3D Telephony System can be used for teleconferencing. Conference calls are improved because the participants can identify who is talking by locating the origin of the sound.

AmbiSense

In the scope of the support programme "Information Technologies Baden Württemberg (BW-FIT)", the Landesstiftung Baden-Württemberg financed the research project AmbiSense (2006-2009). AmbiSense covers the topic of autoidentification and –localisation of objects in order to enhance the efficiency of logistics. We develop innovative algorithms to use WLAN technologies for a cost efficient indoor localisation.

SerfNet

This internal project develops clean slate charging system for Internet access. We take advantage of automatic contract negotiation and the R.H. Coase theorem on Transaction Costs to get a fair, cheap and easy to use charging model.

Eliteprogramm
der Landesstiftung Baden-Württemberg

The Landesstiftung of the State Baden-Württemberg finances projects to support senior scientists. In the program “Studies on the Importance of Speech Frames” we develop psychoacoustic models to predict the impact of losing individual speech frames. These algorithms help to reduce the energy consumption of mobile phones.

ScaleNet

In the scope of the BMBF Project ScaleNet (2005-2008) we developed payment systems for future celluar networks, monitoring of networks and metering support for heterogenous handovers.

NexGenVoIP

In the project "NexGenVoIP", financed by the University of Tübingen in the Young Scientist-Programme (2007-2009), we developed the next generation of VoIP systems. The goal of our work is enhance the audio quality and reduce the latency, so that musicians can jam together over the Internet.

Adaptive Data-Link
to Optimise VoIP over WLAN

We studied in this DFG project (2002-2005) how to improve quality of interactive speech over wireless of local area networks (IEEE 802.11). We adapted the data link to the both characteristics of the channel and the speech properties.

The EU FP5 supported Project Mobivas (2000-2002) developed a framework to download value-added services (VAS) for future mobile devices. Using the Mobivas framework, mobile applications can be downloaded easily into mobile devices (PDAs). To enhance these applications, networking protocols can be updated on demand, too.