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IT Member Profile

... Carla Alexandra Calado Lopes

Researcher

Carla Lopes

Academic position: Assistant Professor
Joining date: 01-01-1999
Roles in IT: Researcher
Thematic Line: Information and Data Sciences
Group: Multimedia Signal Processing – Lr

Email: Send Email
Address: IT Branch – Leiria
Morro do Lena - Alto do Vieiro
Leiria
2411 - 901
Tel: 244820340
Fax: 244820310

ORCID iD
https://www.orcid.org/0000-0002-5366-0016

SCHOLAR

Scientific Achievements

  • PhD, Universidade de Coimbra, 01-01-2012
  • MSc, Universidade de Coimbra, 25-07-2002
  • Licenciatura, Universidade de Coimbra, 14-12-1997
  • Instituto Politécnico de Leiria, 03-03-1998, Professora Adjunta
3Books Chapters
  • C. Lopes, F. Perdigão, Phone Recognition on the TIMIT Database, Chapter in, Speech Technologies, Ivo Ipsic, In-Tech, Rijeka, 2011
  • C. Lopes, A. Veiga, F. Perdigão, Automatic Phone Clustering based on Confusion Matrices, Chapter in, Computational Processing of the Portuguese Language, T. Pardo, A. Branco, A., R. Vieira and V. de Lima, Springer, 2010
  • C. Lopes, F. Perdigão, Event Detection by HMM, SVM and ANN: A Comparative Study, Chapter in, Computational Processing of the Portuguese Language, A. Teixeira, V. Lima, L. Oliveira, and P. Quaresma, Springer, 2008
5Papers in Journals
  • J. Proença, C. Lopes, M.Tjalve Tjalve, A. Stolcke, S. Candeias, F. Perdigão, Mispronunciation Detection in Children's Reading of Sentences, IEEE/ACM Transactions on Audio Speech and Language Processing, Vol. 26, No. 7, pp. 1207 - 1219, July, 2018 | BibTex
  • J. Proença, C. Lopes, M.Tjalve Tjalve, A. Stolcke, S. Candeias, F. Perdigão, Automatic evaluation of reading aloud performance in children, Speech Communication, Vol. 94, No. -, pp. 1 - 14, November, 2017,
    | Abstract     | BibTex
  • C. Lopes, F. Perdigão, Broad Phonetic Class Definition driven by Phone Confusions, Eurasip Journal on Advances in Signal Processing, Vol. 2012, No. 158, pp. - - -, July, 2012,
    | Abstract     | Full text (PDF 1 MB) | BibTex
  • A. Veiga, C. Lopes, D. Celorico, J. Proença, F. Perdigão, S. Candeias, O desafio da participação humana do IT-Coimbra no Págico, Linguamática, Vol. 4, No. 1, pp. 49 - 52, April, 2012 | BibTex
  • C. Lopes, F. Perdigão, VTLN Through Frequency Warping Based on Pitch, Revista da Sociedade Brasileira de Telecomunicações, Vol. 18, No. 1, pp. 86 - 95, June, 2003 | BibTex
41Papers in Conferences
  • A. Q Quito, J. M Marcillo, C. Lopes, C. S. Simplício, PCAM - Personal Computer Alternative Mouse, VII Conferência Internacional para a Inclusão e I Conferência de Tecnologias de Apoio e Acessibilidade INCLUDIT&CTecA2023, Leiria, Portugal, Vol., pp. -, March, 2023 | BibTex
  • L. F. Farinha, P. S. Simões, C. Lopes, C. S. Simplício, SafeSteps - Obstacle detection system for Visually Impaired People, VII Conferência Internacional para a Inclusão e I Conferência de Tecnologias de Apoio e Acessibilidade INCLUDIT&CTecA2023, Leiria, Portugal, March, 2023 | BibTex
  • J. Proença, C. Lopes, M.Tjalve Tjalve, A. Stolcke, S. Candeias, F. Perdigão, Automatic Evaluation of Children Reading Aloud on Sentences and Pseudowords, ISCA - Conf. of the International Speech Communication Association - INTERSPEECH, Stockholm, Sweden, Vol., pp. 2749 - 2753, August, 2017 | BibTex
  • J. Proença, C. Lopes, M.Tjalve Tjalve, A. Stolcke, S. Candeias, F. Perdigão, Detection of Mispronunciations and Disfluencies in Children Reading Aloud, ISCA - Conf. of the International Speech Communication Association - INTERSPEECH, Stockholm, Sweden, Vol., pp. 1437 - 1441, August, 2017 | BibTex
  • J. Proença, D. Celorico, C. Lopes, S. Candeias, F. Perdigão, Automatic Annotation of Disfluent Speech in Children's Reading Tasks, IX Jornadas en Tecnologías del Habla and V Iberian SLTech Workshop IberSPEECH 2016, Lisbon, Portugal, Vol. -, pp. 172 - 181, November, 2016,
    | Abstract     | BibTex
  • J. Proença, D. Celorico, C. Lopes, M. D. Dias, M.Tjalve Tjalve, A. Stolcke, S. Candeias, F. Perdigão, Design and Analysis of a Database to Evaluate Children's Reading Aloud Performance, International Conf. on Computational Processing of Portuguese - PROPOR, Tomar, Portugal, Vol. -, pp. 385 - 395, July, 2016 | BibTex
  • J. Proença, D. Celorico, S. Candeias, C. Lopes, F. Perdigão, The LetsRead Corpus of Portuguese Children Reading Aloud for Performance Evaluation, ELRA International Conf. on Language Resources and Evaluation, - LREC, Portorož, Slovenia, Vol. 1, pp. 781 - 785, May, 2016 | BibTex
  • L.G Gaspar, C. Lopes, Intérprete Automático de Fala em Língua Portuguesa para Língua Gestual Portuguesa, Conferência Internacional para a Inclusão INCLUDIT, Leiria, Portugal, Vol. -, pp. - - -, December, 2015 | BibTex
  • J. Proença, D. Celorico, S. Candeias, C. Lopes, F. Perdigão, Children’s Reading Aloud Performance: a Database and Automatic Detection of Disfluencies, ISCA - Conf. of the International Speech Communication Association - INTERSPEECH, Dresden, Germany, Vol. -, pp. 1655 - 1659, September, 2015,
    | Abstract     | BibTex
  • J. Proença, D. Celorico, S. Candeias, C. Lopes, A. Veiga, F. Perdigão, A Database of Children Reading Aloud for Reading Performance Evaluation, Conf. on Telecommunications - ConfTele, Aveiro, Portugal, Vol. -, pp. - - -, September, 2015,
    | Abstract     | Full text (PDF 735 KBs) | BibTex
  • A. Veiga, C. Lopes, L. V. Sá, F. Perdigão, Acoustic Similarity Scores for Keyword Spotting, International Conf. on Computational Processing of Portuguese - PROPOR, São Carlos, Brazil, Vol. 8775, pp. 48 - 58, October, 2014,
    | Abstract     | BibTex
  • S. Candeias, D. Celorico, J. Proença, A. Veiga, C. Lopes, F. Perdigão, HESITA(te) in Portuguese, European Language Resources Association (ELRA) International Conference on Language Resources and Evaluation - LREC, Reykjavik, Iceland, Vol. --, pp. -- - --, May, 2014 | BibTex
  • Â. T. Teixeira, C. Lopes, F. Perdigão, Detection of Children Speech Disfluency, Portuguese Conf. on Pattern Recognition - RecPad, Coimbra, Portugal, Vol. -, pp. - - -, October, 2012,
    | Abstract     | BibTex
  • C. Lopes, A. Veiga, F. Perdigão, A European Portuguese Children Speech Database for Computer Aided Speech Therapy, International Conf. on Computational Processing of Portuguese - PROPOR, Coimbra, Portugal, Vol. 7243/2012, pp. 368 - 374, April, 2012,
    | Abstract     | BibTex
  • S. Candeias, A. Veiga, C. Lopes, F. Perdigão, A Realização do Schwa no Português Europeu, Brazilian Comput Soc Brazilian Symp. in Information and Human Language Technology - STIL, Cuiabá, Mato Grosso, Brazil, Vol. ---, pp. 26 - 31, October, 2011,
    | Abstract     | BibTex
  • A. Veiga, S. Candeias, C. Lopes, F. Perdigão, Characterization of Hesitations Using Acoustic Models, International Congress of Phonetic Sciences - ICPhS XVII, Hong Kong, China, Vol. -, pp. 2054 - 2057, August, 2011,
    | Abstract     | BibTex
  • C. Lopes, A. Veiga, F. Perdigão, Using Fingerprinting to Aid Audio Segmentation, GTM, RTTH and SIG-IL VI Jornadas en Tecnología del Habla and II Iberian SLTech Workshop - FALA, Vigo, Spain, Vol. -, pp. - - -, November, 2010,
    | Abstract     | BibTex
  • A. Veiga, C. Lopes, F. Perdigão, Speaker Diarization Using Gaussian Mixture Turns and Segment Matching, GTM, RTTH and SIG-IL VI Jornadas en Tecnología del Habla and II Iberian SLTech Workshop - FALA, Vigo, Spain, Vol. -, pp. - - -, November, 2010,
    | Abstract     | BibTex
  • C. Lopes, F. Perdigão, Global Discriminative Training of a Hybrid Speech Recognizer, I Iberian SLTech - I Joint SIG-IL/Microsoft Workshop on Speech and Language Technologies for Iberian Languages, Lisbon, Portugal, Vol. 1, pp. 57 - 60, September, 2009,
    | Abstract     | BibTex
  • B. Silva, H. Mendes, C. Lopes, A. Veiga, F. Perdigão, A Fast Discriminative Training Algorithm For Minimum Classification Error, I Iberian SLTech - I Joint SIG-IL/Microsoft Workshop on Speech and Language Technologies for Iberian Languages, Lisbon, Poland, Vol. 1, pp. 53 - 56, September, 2009,
    | Abstract     | BibTex
  • C. Lopes, F. Perdigão, A Hierarchical Broad-Class Classification to Enhance Phoneme Recognition, European Signal Processing Conference EUSIPCO, Glasgow, United Kingdom, Vol. 1, pp. 1760 - 1764, August, 2009,
    | Abstract     | BibTex
  • C. Lopes, F. Perdigão, Phonetic Recognition Improvements through Input Feature Set Combination and Acoustic Context Window Widening, Conf. on Telecommunications - ConfTele, Sta Maria da Feira, Portugal, Vol. 1, pp. 449 - 452, May, 2009,
    | Abstract     | BibTex
  • J. Lopes, C. Neves, A. Veiga, A. M. Maciel, C. Lopes, L. V. Sá, F. Perdigão, Training A Robust Command Recognizer with the Tecnovoz Database, Jornadas en Tecnología del Habla - JTH, Bilbao, Spain, Vol. -, pp. - - -, November, 2008,
    | Abstract     | BibTex
  • C. Lopes, F. Perdigão, A Discriminative Training Method Applied to a Hybrid ANN/HMM, International Conf. on Signal Processing - ICSP, Beijing, China, Vol., pp. - - -, October, 2008,
    | Abstract     | BibTex
  • B. Silva, H. Mendes, C. Lopes, F. Perdigão, A Fast Discriminative Training Algorithm For Speech Recognition Based On Hidden Markov Models, Portuguese Conf. on Pattern Recognition - RecPad, Coimbra, Portugal, Vol. -, pp. - - -, October, 2008,
    | Abstract     | BibTex
  • C. Neves, A. Veiga, J. Lopes, A. M. Maciel, C. Lopes, F. Perdigão, L. V. Sá, A Robust Speech Command Recognizer for European Portuguese, Portuguese Conf. on Pattern Recognition - RecPad, Coimbra, Portugal, Vol. -, pp. - - -, October, 2008 | BibTex
  • J. Lopes, C. Neves, A. Veiga, A. M. Maciel, C. Lopes, F. Perdigão, L. V. Sá, Development of a Speech Recognizer with the Tecnovoz Database, International Conf. on Computational Processing of Portuguese - PROPOR, Aveiro, Portugal, Vol., pp. 260 - 263, September, 2008,
    | Abstract     | BibTex
  • A. M. Maciel, A. Veiga, C. Neves, Lopes, C. Lopes, F. Perdigão, L. V. Sá, A Robust Speech Command Recognizer For Embedded Applications, International Conf. on Signal Processing and Multimedia Applications, Porto, Portugal, Vol., pp. 92 - 95, July, 2008,
    | Abstract     | BibTex
  • C. Lopes, F. Perdigão, Speech Event Detection By Non Negative Matrix Deconvolution, European Signal Processing Conference EUSIPCO, Poznan, Poland, Vol. -, pp. - - -, September, 2007 | BibTex
  • C. Lopes, F. Perdigão, Hybrid HMM/SVM Speech Event Detector, Conf. on Telecommunications - ConfTele, Peniche, Portugal, Vol. 1, pp. 601 - 604, May, 2007 | BibTex
  • C. Lopes, F. Perdigão, Speech event detection using SVM and NMD, International Symp. on Signal Processing and its Applications - ISSPA, Sharjah, United Arab Emirates, Vol. --, pp. -- - --, February, 2007 | BibTex
  • C. Lopes, F. Perdigão, Non-negative matrix factorization: dealing with scaled objects, Mathematical Techniques and Problems in Telecommunications, Leiria, Portugal, Vol. 1, pp. 40 - 44, September, 2006 | BibTex
  • C. Lopes, F. Perdigão, Improved Performance Evaluation of Speech Event Detectors, International Conf. on Spoken Language Processing - ICSLP, Pittsburgh, United States, Vol. -, pp. - - -, September, 2006 | BibTex
  • P.A. Assunção, C. Lopes, R. F. S. Caldeirinha, A B-Learning Approach for Electrical Engineering Based on Wireless Access to Pedagogical e-Content, International Conf. on Signal Processing and Multimedia Applications, Setubal, Portugal, Vol. 1, pp. 277 - 285, August, 2006 | BibTex
  • P.A. Assunção, C. Lopes, R. F. S. Caldeirinha, S.M.M. Faria, V. Rodrigues, Conteúdos de Banda Larga para Campus Virtuais, Conf. ELearning no Ensino Superior - ELES, Aveiro, Portugal, Vol. 1, pp. - - -, October, 2004 | BibTex
  • C. Lopes, P.A. Assunção, Um Modelo Pedagógico Baseado em Múltiplas Interacções - Aplicação a Cursos de Engenharia, Conf. ELearning no Ensino Superior - ELES, Aveiro, Portugal, Vol. 1, pp. - - -, October, 2004 | BibTex
  • S.M.M. Faria, P.A. Assunção, Nuno M. M. Rodrigues, L. Mendes, C. Lopes, C. Ribeiro, C. S. Silva, J. Pereira, L. Alves, P. C. Ventura, Sistema de Controlo e Comunicações de uma Aeronave Não Tripulada - SkyGu@rdian, Conf. da Engenharia - UBIEngenharias, Covilhã, Portugal, Vol., pp. - https://www.researchgate.net/publication/236210154_SISTEMA_DE_CONTROLO_E_COMUNICACOES_DE_UMA_AERONAVE_NAO_TRIPULADA_-_SKYGURDIAN, November, 2003 | BibTex
  • C. Lopes, F. Perdigão, VTLN through Frequency Warping Based on Pitch, IEEE International Telecommunications Symp., Natal, Brazil, Vol. -, pp. - - -, September, 2002 | BibTex
  • C. Lopes, F. Perdigão, On the Use of Pitch to Perform Speaker Normalization, International Conf. on Telecommunications, Electronics and Control, Santiago de Cuba, Cuba, Vol. -, pp. - - -, July, 2002 | BibTex
  • C. Lopes, F. Perdigão, Modeling Intra and Inter Speaker Variability, Portuguese Conf. on Pattern Recognition - RecPad, Aveiro, Portugal, Vol. -, pp. - - -, June, 2002 | BibTex
  • L. Alves, L. Mendes, C. Lopes, T. Fernandes, P.A. Assunção, S.M.M. Faria, Nuno M. M. Rodrigues, M. Figueiredo, SimSAT – Desenvolvimento de Satélites de Baixa Altitude, Encontro do Colégio de Electrotecnia da Ordem dos Engenheiros, Porto, Portugal, Vol., pp. - https://www.researchgate.net/publication/236210137_SimSAT_-_Desenvolvimento_de_Satelites_de_Baixa_Altitude, April, 2001 | BibTex

Closed Projects4

Acronym Name Funding Agency Start date Ending date
AcuRec Acoustic Modelling for Speech Recognition IT/LA 01-09-2005 30-09-2007
HE[eee]SIT[u]ATION HE[eee]SIT[u]ATION: Portuguese Hesitation Models FCT/PTDC 01-02-2011 01-06-2013
LETSREAD Automatic assessment of reading ability of children IT/LA 01-02-2014 01-03-2016
Tecnovoz Tecnovoz ADI 01-07-2006 01-09-2008
2Awards
  • J. Proença, D. Celorico, C. Lopes, M. D. Dias, M.Tjalve Tjalve, A. Stolcke, S. Candeias, F. Perdigão, Camões Prize 2016 for the Technologies for the Portuguese Language, Best paper award at PROPOR 2016 – International Conference on the Computational Processing of Portuguese, given by the Camões Institue for the paper "Design and Analysis of a Database to Evaluate Children’s Reading Aloud Performance", 01-07-2016
  • C. Lopes, F. Perdigão, VTLN through Frequency Warping Based on Pitch, prize for best paper in IEEE International Telecommunications Symposium-ITS2002, Natal, Brazil, 12-09-2002
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