Media professionals – such as news editors, image researchers, and documentary filmmakers increasingly rely on online access to digital content within audiovisual archives to create narratives. Retrieving audiovisual sources therefore requires an in-depth knowledge of how to find sources digitally. These storytelling practices intertwine search technologies with the user’s ideas and production ...

Normal-learning children (NL) and children with learning disabilities (LD) reported their perceptions of unisensory (auditory or visual), concordant audiovisual (e.g. visual /apa/ and auditory /apa/) and conflicting (e.g. visual /aka/ and auditory /apa/) speech stimuli in quiet and noise (0 dB and -12 dB signal-to-noise ratio, SNR). In normal populations, watching such conflicting combinations ...

This paper presents an algorithm to correlate audio and visual data generated by the same physical phenomenon. According to psychophysical experiments, temporal synchrony strongly contributes to integrate cross-modal information in humans. Thus, we define meaningful audiovisual structures as temporally proximal audio-video events. Audio and video signals are represented as sparse decompositions...

Audiovisual performance is a fertile area for creative expression, an intersection of experimental cinema and computer music that has seen a groundswell of interest in recent years. To create works in this emerging medium, a complex network of relationships between sounds, images and sensor input must be organized. This complexity poses major technical and aesthetic challenges which a systemati...

............................................................................................... v Introduction............................................................................................. 1 Review of the literature ............................................................................... 3 Auditory speech perception ............................................................

Many of today’s audiovisual application systems offer some kind of interactivity. Yet, quality assessments of these systems are often performed without taking into account the possible effects of divided attention caused by interaction or user task. We present a subjective assessment performed among 40 test subjects to investigate the impact of divided attention on the perception of audiovisual...

Speech is the most important form of human communication but ambient sounds and competing talkers often degrade its acoustics. Fortunately the brain can use visual information, especially its highly precise spatial information, to improve speech comprehension in noisy environments. Previous studies have demonstrated that audiovisual integration depends strongly on spatiotemporal factors. Howeve...

Many organisms sample their environment through multiple sensory systems and the integration of multisensory information enhances learning. However, the mechanisms underlying multisensory memory formation and their similarity to unisensory mechanisms remain unclear. Filial imprinting is one example in which experience is multisensory, and the mechanisms of unisensory neuronal plasticity are wel...

In a recent study in younger adults (19-29 year olds) we showed evidence that distributed audiovisual attention resulted in improved discrimination performance for audiovisual stimuli compared to focused visual attention. Here, we extend our findings to healthy older adults (60-90 year olds), showing that performance benefits of distributed audiovisual attention in this population match those o...

This paper reports results of a study investigating the visual information conveyed by the dynamics of internal articulators. Intelligibility of synthetic audiovisual speech with and without visualization of the internal articulator movements was compared. Additionally speech recognition scores were contrasted before and after a short learning lesson in which articulator trajectories were expla...