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Academic Paper


Title: Finite-state multimodal integration and understanding
Author: Michael Johnston
Institution: AT&T Labs – Research
Author: Srinivas Bangalore
Institution: AT&T Labs – Research
Linguistic Field: Phonology
Abstract: Multimodal interfaces are systems that allow input and/or output to be conveyed over multiple channels such as speech, graphics, and gesture. In addition to parsing and understanding separate utterances from different modes such as speech or gesture, multimodal interfaces also need to parse and understand composite multimodal utterances that are distributed over multiple input modes. We present an approach in which multimodal parsing and understanding are achieved using a weighted finite-state device which takes speech and gesture streams as inputs and outputs their joint interpretation. In comparison to previous approaches, this approach is significantly more efficient and provides a more general probabilistic framework for multimodal ambiguity resolution. The approach also enables tight-coupling of multimodal understanding with speech recognition. Since the finite-state approach is more lightweight in computational needs, it can be more readily deployed on a broader range of mobile platforms. We provide speech recognition results that demonstrate compensation effects of exploiting gesture information in a directory assistance and messaging task using a multimodal interface.

CUP AT LINGUIST

This article appears IN Natural Language Engineering Vol. 11, Issue 2, which you can READ on Cambridge's site or on LINGUIST .



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