Filter Construction for Real-Time Processing

Virtual environments should be multimodal and interactive. The technology used for simulation and reproductions must take into consideration the aspect of several sensory inputs in real time and the interaction with the person who is embedded in the virtual environment. In order to achieve a real-time performance, specific runtime conditions must be taken into account in order to stay within acceptable limits for latency and update rates. For the acoustic component of VR, we can use information from psychoacoustics on these limits. In this chapter, the implementation of software and hardware tools is introduced which provide real-time performance and interaction: head tracking and adaptive filtering.