
Chapter | 13 Multimodal HCI Output
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experimenting with various kinds of potential input signals and their
features, as well as exploring the correlation of such signals or features
with the gesturing behaviour.
13.5.2 Rule-Based Approaches
The majority of researchers attempting to generate full AV speech
base their work on studies of human behaviour related to speech
and conversation. Detailed studies exist for many specific aspects
of speech-accompanying actions at different levels, e.g., relation
between speech and eyebrow motion [31, 32, 33, 34]; relation between
voice parameters such as amplitude and fundamental frequency and
head motion [35, 36]; ...