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Pocta, P. (author), Beerends, J.G. (author)This paper assesses the perceived listening quality of customer support waiting loops using both a subjective experiment as well as an objective perceptual assessment with POLQA (ITU-T Rec. P.863) and VISQOL. A modified version of the methodology defined in the ITU-T Rec. P.835 was derived and used in this paper to subjectively assess the...article 2019
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Friedman, D. (author), Brouwer, A.M. (author), Nijholt, A. (author)In principle, brain-computer interfaces (BCIs) hold the promise for being the ultimate intelligent interfaces - what could surpass an interface that is able to interpret your thoughts and preferences, in real time, and behave accordingly? In practice, it is still not quite clear if and how BCIs can contribute to or replace existing interaction...conference paper 2017
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Gallardo, L.F. (author), Möller, S. (author), Beerends, J. (author)The performance of automatic speech recognition based on coded-decoded speech heavily depends on the quality of the transmitted signals, determined by channel impairments. This paper examines relationships between speech recognition performance and measurements of speech quality and intelligibility over transmission channels. Different to...conference paper 2017
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Ebem, D.U. (author), Beerends, J.G. (author), van Vugt, J. (author), Schmidmer, C. (author), Kooij, R.E. (author), Uguru, J.O. (author)The extent to which the modeling used in objective speech quality algorithms depends on the cultural background of listeners as well as on the language characteristics using American English and Igbo, an African tone language is investigated. Two different approaches were used in order to separate behavioral aspects from speech signal aspects....article 2011
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Neerincx, M.A. (author), Cremers, A.H.M. (author), Kessens, J.M. (author), van Leeuwen, D.A. (author), Truong, K.P. (author), TNO Defensie en Veiligheid (author)This paper presents a methodology to apply speech technology for compensating sensory, motor, cognitive and affective usage difficulties. It distinguishes (1) an analysis of accessibility and technological issues for the identification of context-dependent user needs and corresponding opportunities to include speech in multimodal user interfaces...article 2009
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Huijbregts, M. (author), van Leeuwen, D.A. (author), de Jong, F.M.G. (author), TNO Defensie en Veiligheid (author)In this paper we present a method for combining multiple diarization systems into one single system by applying a majority voting scheme. The voting scheme selects the best segmentation purely on basis of the output of each system. On our development set of NIST Rich Transcription evaluation meetings the voting method improves our system on all...conference paper 2009
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Huijbregts, M. (author), van Leeuwen, D.A. (author), de Jong, F.M.G. (author), TNO Defensie en Veiligheid (author)In this paper we present the two-pass speaker diarization system that we developed for the NIST RT09s evaluation. In the first pass of our system a model for speech overlap detection is generated automatically. This model is used in two ways to reduce the diarization errors due to overlapping speech. First, it is used in a second diarization...conference paper 2009
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Looije, R. (author), Melder, W.A. (author), Neerincx, M.A. (author), TNO Defensie en Veiligheid (author)Learning a process control task, such as tactical picture compilation in the Navy, is difficult, because the students have to spend their limited cognitive resources both on the complex task itself and the act of learning. In addition to the resource limits, motivation can be reduced when learning progress is slow. Intelligent Virtual Agents may...conference paper 2008
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van Wijngaarden, S.J. (author), Drullman, R. (author), TNO Defensie en Veiligheid (author)Although the speech transmission index STI is a well-accepted and standardized method for objective prediction of speech intelligibility in a wide range of environments and applications, it is essentially a monaural model. Advantages of binaural hearing in speech intelligibility are disregarded. In specific conditions, this leads to considerable...article 2008
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Truong, K.P. (author), Neerincx, M.A. (author), van Leeuwen, D.A. (author), TNO Defensie en Veiligheid (author)We investigated inter-observer agreement and the reliability of self-reported emotion ratings (i.e., self-raters judging their own emotions) in spontaneous multimodal emotion data. During a multiplayer video game, vocal and facial expressions were recorded (including the game content itself) and were annotated by the players themselves on...conference paper 2008
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Strik, H. (author), Truong, K. (author), de Wet, F. (author), Cucchiarini, C. (author), TNO Defensie en Veiligheid (author)Providing feedback on pronunciation errors in computer assisted language learning systems requires that pronunciation errors be detected automatically. In the present study we compare four types of classifiers that can be used for this purpose: two acoustic-phonetic classifiers (one of which employs linear-discriminant analysis (LDA)), a...conference paper 2007
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van Leeuwen, D.A. (author), Truong, K.P. (author), TNO Defensie en Veiligheid (author)This paper introduces a detection methodology for recognition technologies in speech for which it is dif cult to obtain an abundance of non-target classes. An example is language recognition, where we would like to be able to measure the detection capability of a single target language without confounding with the modeling capability of non...conference paper 2007
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Truong, K.P. (author), van Leeuwen, D.A. (author), TNO Defensie en Veiligheid (author)In this paper, we introduce a visual analysis method to assess the discriminability and confusiability between emotions according to automatic emotion classifiers. The degree of acoustic similarities between emotions can be defined in terms of distances that are based on pair-wise emotion discrimination experiments. By employing Multidimensional...conference paper 2007
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Pigeon, S. (author), Shen, W. (author), Lawson, A. (author), van Leeuwen, D.A. (author), TNO Defensie en Veiligheid (author)This paper describes the speech database that has a central role in the Interspeech 2007 special session "Novel techniques for the NATO non-native Air Traffic Communications database." The rationale for recording and distributing this common research object is given, and details about the acquisition and annotation are given, as well as some...conference paper 2007
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Kessens, J.M. (author), van Leeuwen, D.A. (author), TNO Defensie en Veiligheid (author)In this paper, we describe N-best 2008, the first Large Vocabulary Speech Recognition (LVCSR) benchmark evaluation held for the Dutch language. Both the accent as spoken in the Netherlands (Northern-Dutch) and in Belgium (Southern-Dutch or Flemish), will be evaluated. The evaluation tasks are broadcast news (BN) and conversational telephone...conference paper 2007
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Beerends, J.G. (author), Busz, B. (author), Oudshoorn, P. (author), van Vugt, J. (author), Ahmed, K. (author), Niamut, O. (author), TNO Informatie- en Communicatietechnologie (author)The authors discuss the way we perceive the quality of a speech signal and how different degradations contribute to the overall perceived speech (listening) quality. More specifically, ITU-T Recommendation P.862 (perceptual evaluation of speech quality-PESQ), which provides a perceptual modeling approach with which the subjectively perceived...article 2007
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Leurdijk, A. (author), Limonard, S. (author), TNO Informatie- en Communicatietechnologie (author)NM2 (New Media for a New Millennium) develops tools for interactive, personalised and non-linear audio-visual content that will be tested in seven pilot productions. This paper looks at the market potential for these productions from a technological, a business and a users' perspective. It shows that digital broadcast networks and broadband...conference paper 2005
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van Leeuwen, D.A. (author), TNO Defensie en Veiligheid (author)New in the 2004 edition of the NIST Speaker Recognition Evaluation (SRE) was the condition where unsupervised adaptation of speaker models is allowed. Despite the promising results on development test material, hardly any beneficial results were obtained in the Evaluation itself. An analysis is made why this was the case, and it appears that a...conference paper 2005
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TNO Defensie en Veiligheid (author), van Gils, B.J.C.M. (author), van Wijngaarden, S.J. (author), van Buuren, R. (author)Nearly all types of military speech communication involve the use of so-called (narrow band) voice coders or vocoders. Usually the Speech Transmission Index (STI) uses artificial test signals, which can not be reproduced by vocoders with the usual fidelity. Therefore the STI is not able to evaluate vocoders at this time. Although it is...conference paper 2005
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