The increasing demand for multi-modal systems and applications that are highly interactive and multi-sensory in nature
has led to the introduction of new media and new user interface devices in multimedia computing. Computer generated
smell, also known as olfactory data, is one of such media objects currently generating a lot of interest in the multimedia
industry. We are currently focusing our attention on exploring user perception of computer generated smell when
combined with other media to enrich their multimedia experience. In this paper, we present the results of an empirical
study into users' perception of olfactory enhanced multimedia displays. Results showed that users generally enjoy an
enhanced multimedia experience when augmented by olfactory stimuli, and that the presence of such stimuli increases
the sense of relevance. Whilst there is a general positive bias towards olfactory enhanced multimedia applications,
specific properties of smell such as diffusion and lingering mean that in practice specific attention needs to be given
when a mix of smells is associated with visualised multimedia content; moreover, it was found that whilst smell was
incorrectly identified in some instances, the presence of smell per se is generally enough to create a richer user
multimedia experience.
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