Publications by Plamen Prodanov

Low-level grounding in a multimodal mobile service robot conversational system using graphical models

Jonas Richiardi, Andrzej Drygajlo, Plamen Prodanov, Anil Alexander

The main task of a service robot with a voice-enabled communication interface is to engage a user in dialogue providing an access to the services it is designed for. In managing such interaction, inferring the user goal (intention) from the request for a s ...

Springer-Verlag2008

Reliability-based decision fusion in multimodal biometric verification systems

Jonas Richiardi, Andrzej Drygajlo, Plamen Prodanov, Krzysztof Kryszczuk

We present a methodology of reliability estimation in the multimodal biometric verification scenario. Reliability estimation has shown to be an efficient and accurate way of predicting and correcting erroneous classification decisions in both unimodal (spe ...

2007

Confidence and Reliability Measures in Speaker Verification

Jonas Richiardi, Andrzej Drygajlo, Plamen Prodanov

Speaker verification is a biometric identity verification technique whose performance can be severely degraded by the presence of noise. Using a coherent notation, we reformulate and review several methods which have been proposed to quantify the uncertain ...

2006

Error handling in multimodal voice-enabled interfaces of tour-guide robots using graphical models

Plamen Prodanov

Mobile service robots are going to play an increasing role in the society of humans. Voice-enabled interaction with service robots becomes very important, if such robots are to be deployed in real-world environments and accepted by the vast majority of pot ...

EPFL2006

A Probabilistic Measure of Modality Reliability in Speaker Verification

Plamen Prodanov

In this paper, a probabilistic measure for reliability of speaker verification under noisy acoustic conditions is proposed. A Bayesian network is used to estimate a probability for verification errors, given the GMM-based speaker verification system output ...

2005

Error Handling in Multimodal Biometric Systems using Reliability Measures

Plamen Prodanov

In this paper, we present a framework for predicting and correcting classification decision errors based on modality reliability measures in a multimodal biometric system. In our experiments we use face and speech experts based on a recently proposed frame ...

IEEE2005

Bayesian Networks Based Multimodality Fusion for Error Handling in Human-Robot Dialogues Under Noisy Conditions

Andrzej Drygajlo, Plamen Prodanov

In this paper, we introduce probabilistic model based architecture for error handling in human–robot spoken dialogue systems under adverse audio conditions. In this architecture, a Bayesian network framework is used for interpretation of multi-modal signal ...

2005

Decision Networks for Repair Strategies in Speech-based Interaction with Mobile Tour-Guide Robots

Plamen Prodanov

The main task of a voice-enabled tour-guide robot in mass exhibition setting is to engage visitors in dialogue and provide as much exhibit information as possible in a limited time. In managing such a dialogue, extracting the user (visitor) goal or intenti ...

2005