Maria Georgescul


2010

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A Hedgehop over a Max-Margin Framework Using Hedge Cues
Maria Georgescul
Proceedings of the Fourteenth Conference on Computational Natural Language Learning – Shared Task

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A Multilingual CALL Game Based on Speech Translation
Manny Rayner | Pierrette Bouillon | Nikos Tsourakis | Johanna Gerlach | Maria Georgescul | Yukie Nakao | Claudia Baur
Proceedings of the Seventh International Conference on Language Resources and Evaluation (LREC'10)

We describe a multilingual Open Source CALL game, CALL-SLT, which reuses speech translation technology developed using the Regulus platform to create an automatic conversation partner that allows intermediate-level language students to improve their fluency. We contrast CALL-SLT with Wang's and Seneff's ``translation game'' system, in particular focussing on three issues. First, we argue that the grammar-based recognition architecture offered by Regulus is more suitable for this type of application; second, that it is preferable to prompt the student in a language-neutral form, rather than in the L1; and third, that we can profitably record successful interactions by native speakers and store them to be reused as online help for students. The current system, which will be demoed at the conference, supports four L2s (English, French, Japanese and Swedish) and two L1s (English and French). We conclude by describing an evaluation exercise, where a version of CALL-SLT configured for English L2 and French L1 was used by several hundred high school students. About half of the subjects reported positive impressions of the system.

2008

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Building Mobile Spoken Dialogue Applications Using Regulus
Nikos Tsourakis | Maria Georgescul | Pierrette Bouillon | Manny Rayner
Proceedings of the Sixth International Conference on Language Resources and Evaluation (LREC'08)

Regulus is an Open Source platform that supports construction of rule-based medium-vocabulary spoken dialogue applications. It has already been used to build several substantial speech-enabled applications, including NASA’s Clarissa procedure navigator and Geneva University’s MedSLT medical speech translator. System like these would be far more useful if they were available on a hand-held device, rather than, as with the present version, on a laptop. In this paper we describe the Open Source framework we have developed, which makes it possible to run Regulus applications on generally available mobile devices, using a distributed client-server architecture that offers transparent and reliable integration with different types of ASR systems. We describe the architecture, an implemented calendar application prototype hosted on a mobile device, and an evaluation. The evaluation shows that performance on the mobile device is as good as performance on a normal desktop PC.

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A Comparative Study of Mixture Models for Automatic Topic Segmentation of Multiparty Dialogues
Maria Georgescul | Alexander Clark | Susan Armstrong
Proceedings of the Third International Joint Conference on Natural Language Processing: Volume-II

2006

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TQB: Accessing Multimodal Data Using a Transcript-based Query and Browsing Interface
Andrei Popescu-Belis | Maria Georgescul
Proceedings of the Fifth International Conference on Language Resources and Evaluation (LREC’06)

This article describes an interface for searching and browsing multimodal recordings of group meetings. We provide first an overall perspective of meeting processing and retrieval applications, and distinguish between the media/modalities that are recorded and the ones that are used for browsing. We then proceed to describe the data and the annotations that are stored in a meeting database. Two scenarios of use for the transcript-based query and browsing interface (TQB) are then outlined: search and browse vs. overview and browse. The main functionalities of TQB, namely the database backend and the multimedia rendering solutions are described. An outline of evaluation perspectives is finally provided, with a description of the user interaction features that will be monitored.

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An Analysis of Quantitative Aspects in the Evaluation of Thematic Segmentation Algorithms
Maria Georgescul | Alexander Clark | Susan Armstrong
Proceedings of the 7th SIGdial Workshop on Discourse and Dialogue

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Word Distributions for Thematic Segmentation in a Support Vector Machine Approach
Maria Georgescul | Alexander Clark | Susan Armstrong
Proceedings of the Tenth Conference on Computational Natural Language Learning (CoNLL-X)

2004

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Building and Using a Corpus of Shallow Dialogue Annotated Meetings
Andrei Popescu-Belis | Maria Georgescul | Alexander Clark | Susan Armstrong
Proceedings of the Fourth International Conference on Language Resources and Evaluation (LREC’04)