Scott Prevost

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The paper proposes a theory relating syntax, discourse semantics, and intonational prosody. The full range of English intonational tunes distinguished by Pierrehumbert and their semantic interpretation in terms of focus and information structure are discussed, including “discontinuous” themes and rhemes. The theory is based on Combinatory Categorial(More)
We describe an implemented system which <italic>automatically</italic> generates and animates conversations between multiple human-like agents with appropriate and synchronized speech, intonation, facial expressions, and hand gestures. Conversation is created by a dialogue planner that produces the text as well as the intonation of the utterances. The(More)
In this dissertation I present a model for the determination of intonation contours from context and provide two implemented systems which apply this theory to the problem of generating spoken language with appropriate intonation from high-level semantic representations. The theory and implementations presented here are based on an information structure(More)
We describe a Parameterized Action Representation (PAR) designed to bridge the gap between natural language instructions and the virtual agents who are to carry them out. The PAR is therefore constructed based jointly on implemented motion capabilities of virtual human figures and linguistic requirements for instruction interpretation. We will illustrate(More)
This paper addresses the problem of designing conversational agents that exhibit appropriate gaze behavior during dialogues with human users. Previous research on gaze behavior has concentrated on its relationship to turn-taking phenomena [4,5,6]. Recent work has incorporated some of these findings into the design of autonomous human-like conversational(More)
Concept-to-Speech (CTS) systems, which aim to synthesize speech from semantic information and discourse context, have succeeded in producing more appropriate and naturalsounding prosody than text-to-speech (TTS) systems, which rely mostly on syntactic and orthographic information. In this paper, we show how recent advances in CTS systems can be used to(More)
Participants in face-to-face dialogue have available to them information from a variety of modalities that can help them to understand what is being communicated by a speaker. While much of the information is conveyed by the speaker’s choice of words, his/her intonational patterns, facial expressions and gestures also reflect the semantic and pragmatic(More)
Until now theories of the gesture-speech relationship have been difficult to evaluate because of their descriptive basis. In this paper we provide a tool for investigating the relationship between speech and gesture: a system that generates speech, intonation, and gesture using two copies of an identical program that have different knowledge of the world(More)
This paper presents a theory and a computational implementation for generating prosodically appropriate synthetic speech in response to database queries. Proper distinctions of contrast and emphasis are expressed in an intonation contour that is synthesized by rule under the control of a grammar, a discourse model, and a knowledge base. The theory is based(More)