Carla Alexandra Calado Lopes

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

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

SCHOLAR

Scientific Achievements

Degrees

PhD, Universidade de Coimbra, 01-01-2012
MSc, Universidade de Coimbra, 25-07-2002
Licenciatura, Universidade de Coimbra, 14-12-1997

Affiliations

Instituto Politécnico de Leiria, 03-03-1998, Professora Adjunta

Academic Activities

5Lecture courses

Electrónica, , Lic. Engenharia Informática e Comunicações

Electrónica Analógica I, , Lic. Engenharia Electrotécnica

Electrónica, , Lic. em Engenharia Mecânica

Electrónica, , Lic. em Engenharia Informática

Complementos de Electrónica, , Lic. Engenharia Electrotécnica

2Supervision of MSc theses

As Supervisor

Performance evaluation and optimisation of voice command recognition in noisy environments, MSc Student, Samuel Dias Neto, Concluded 09-2021
IF2LGP - Intérprete automático de fala em Língua Portuguesa para Língua Gestual Portuguesa, MSc Student, Luís Romão Gaspar, Concluded 09-2015

Publications

3Books Chapters

C. Lopes, F. Perdigão, Phone Recognition on the TIMIT Database, Chapter in, Speech Technologies, Ivo Ipsic, In-Tech, 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

Projects

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

Other Scientific Achievements

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

IT Member Profile

Carla Lopes

Scientific Achievements

As Supervisor

Closed Projects4