7 accepted papers
Presentation attack detection (PAD) aims to determine if a speech signal observed at a microphone was produced by a live talker or if it was replayed through a loudspeaker. This is an important problem to address for secure human-computer voice interactions. One characteristic of presentation attack…
We present a performance comparison between human listeners and a simple algorithm for the task of speech anomaly detection. The algorithm utilises an intentionally small set of features derived from the source-filter model, with the aim of validating that key components of source-filter theory char…
Key parameters that characterise the degree of degradation in an acoustic environment are reverberation time (RT), direct-to-reverberant ratio (DRR) and signal-to-noise ratio (SNR). To address the inherent interplay that exists between these parameters, which can hinder existing methods designed to…
Indoor localisation is an important research topic with several possible applications. For example, knowing a user's location can be used as navigation aid in hospitals and malls, or for better targeted marketing. In this paper we consider the case where the environment of interest is equipped with…
A computer being able to estimate the geometry of a room could benefit applications such as auralization, robot navigation, virtual reality and teleconferencing. When estimating the geometry of a room using multiple microphones, the main challenge is to identify which reflections, or echoes, origina…
In this paper, a broadband region-based near-field beamforming algorithm is proposed and demonstrated for acoustic applications. We use an eigenfilter structure with a minimum-energy cost function based on desired and undesired near-field regions. Robustness is thus achieved by focusing on signals g…
In wireless acoustic sensor networks (WASNs), clock synchronization is crucial for multi-microphone signal processing, since clock differences between capturing devices will cause signal drift. This in turn severely degrades the performance of multi-microphone signal processing. After a theoretical…