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Dr. Gražina Korvelgrazina korvel

Department: Image and Signal Analysis Group
Position: Senior Researcher, Project Principal Researcher

Address: Akademijos st. 4, room 627, Vilnius
Tel: (+370 5) 210 9315
E-mail:  

 

 

 

 

Scientific and Pedagogical Background

Ph.D. 2013 Technological Sciences, Informatics Engineering (07T) Vilnius University, Institute of Data Science and Digital Technologies
Research Advisor:  Prof. Dr. Vytautas Slivinskas, Academic Consultant: Assoc. Prof. Dr. Virginija Šimonytė
Thesis Title: “Analysis and synthesis of Lithuanian phoneme dynamic sound models”

M.Sc. 2009 Informatics (with honours) Lithuanian University of Educational Sciences, Vilnius

B.Sc. 2007 Mathematic Lithuanian University of Educational Sciences, Vilnius

Scientific activities

Research areas:
Signal model parameter estimation
Developing of sound mathematical models
Speech signal processing

 

Membership in scientific organizations:

Member of the Young Academy of the Lithuanian Academy of Sciences
Member of Lithuanian Computer Society
Member of Lithuanian Mathematical Society
Member of IEEE Computer Society
Member of INSTICC (the Institute for Systems and Technologies of Information) 

Leads PhD Students:

Scientific supervisor of doctoral student Justina Ramonaitė (from 2023.10.01)
Academic consultant of Krzysztof Kąkol
Dissertation defended on 12 January 2023 at Gdansk University of Technology
Topic of research „A method for improving speech intelligibility using the Lombard effect and deep learning“

 

Editorial Board member:

A member of editorial board of The Journal of Intelligent Information Systems (https://link.springer.com/journal/10844) 

 

Conference organizing:

Session chair at the 14th International Workshop on Data Analysis Methods for Software Systems, November 30 – December 2, 2023 Druskininkai, Lithuania

Program committee member of International Symposium on Methodologies for Intelligent Systems, ISMIS 2022, 3-5 October 2022, Cosenza, Italy

Session "Multidimensional Signal Processing" chair, the 16th International Conference on Signal Processing and Multimedia, SIGMAP 2019, 26-28 July, Prague, Czech Republic

Session „Intelligent Audio Processing“ programme committee member, the 11th International Conference on Multimedia and Network Information System, 12-14 September 2018, Wrocław, Poland (https://missi.pwr.edu.pl/2018/sessions/MISSI_IAP_2018.pdf)

 

Teaching experience:

Participation in the preparation of a new bachelor's program in Information Systems Engineering in 2016–2017. The module "Natural language processing" has been developed.
Developer and consultant for doctoral study modules: Digital Signal Processing and Natural Language Processing.

 

Reviewer of international journals:

▪ Informatica www.mii.lt/informatica
▪ The Journal of the Audio Engineering Society www.aes.org/journal
▪ The Journal of the Acoustical Society of America https://asa.scitation.org/journal/jas
▪ Archives of Acoustics http://acoustics.ippt.gov.pl
▪ Metrology and Measurement Systems http://www.metrology.pg.gda.pl
▪ The Journal of Intelligent Information Systems https://link.springer.com/journal/10844
▪ Speech Communication www.journals.elsevier.com/speech-communication
▪ Pattern Recognition Letters www.journals.elsevier.com/speech-communicat
▪ Information Technology and Control http://itc.ktu.lt">http://itc.ktu.lt
▪ Symmetry https://www.mdpi.com/journal/symmetry
▪ Applied Sciences https://www.mdpi.com/journal/applsci
▪ Electronics https://www.mdpi.com/journal/electronics
 

Scientific publications

List of publications

 

Presentations at scientific conferences

  1. J. Ramonaitė, P. Gore, G. Korvel, G. Tamulevičius “Investigation of Speech Signal Processing Parameters in Wave-U-Net Source Separation”, The 14th International Workshop on Data Analysis Methods for Software Systems, November 30 – December 2, 2023 Druskininkai, Lithuania
  2. T. Piernicki, G. Korvel, B. Kostek “Acquiring Knowledge for Mimicking Dysarthric Speech by Incorporating Its Features into Synthetic Speech”, The 14th International Workshop on Data Analysis Methods for Software Systems, November 30 – December 2, 2023 Druskininkai, Lithuania
  3. G. Navickas, G. Korvel “UniDive – Universality, Diversity and Idiosyncrasy in Language Technology”, The 14th International Workshop on Data Analysis Methods for Software Systems, November 30 – December 2, 2023 Druskininkai, Lithuania
  4. J. Ramonaitė, G. Korvel, "Noisy Phoneme Recognition Using 2D Convolution Neural Network"; 10th Jubilee Workshop on Advances in Information, Electronic and Electrical Engineering (AIEEE), April 27-29, 2023, Vilnius
  5. G. Korvel, A. Katsalis, K. Diamantaras, E. Lloret „Enrich Knowledge Graphs and Test Pre-trainedEnrich Knowledge Graphs and Test Pre-trainedLanguage Models in Graph2seq Tasks“, The 13th International Workshop on Data Analysis Methods for Software Systems, December 1 – 3, 2022 Druskininkai, Lithuania
  6. G. Korvel, G. Tamulevičius, J. Devenson „Speech Signal Enhancement for Audio Forensics: An Initial Study“, The 13th International Workshop on Data Analysis Methods for Software Systems, December 1 – 3, 2022 Druskininkai, Lithuania
  7. G. Korvel, P. Treigys, B. Kostek „Evaluation of Measures Applied to Monitor the Lombard Speech Signal
    in the Presence of Noise“, The 13th International Workshop on Data Analysis Methods for Software Systems, December 1 – 3, 2022 Druskininkai, Lithuania
  8. G. Korvel, K. Kąkol, P. Treigys, B. Kostek “Investigating the influence of noise interference on speech towards a future machine learning-based system for applying the Lombard effect automatically”, ISMIS 2022 : 26th International Symposium on Methodologies for Intelligent Systems, 3-5 October, Cosenza, Italy
  9. G. Korvel, K. Kąkol, P. Treigys, B. Kostek „Examining the Self-Similarity Method for the Lombard Effect Recognition", The 12th International Workshop on Data Analysis Methods for Software Systems, December 2 – 4, 2021 Druskininkai, Lithuania
  10. G. Korvel, K. Kąkol, B. Kostek. “Similarity matrices applied to differentiate between Lombard and natural speech”. A lecture presentation at the 181st Meeting of the Acoustical Society of America in Seattle, November 29 – December 3, 2021, Washington
  11. G. Korvel, P. Treigys, K. Kąkol, B. Kostek. "Lombardo šnekos ir jos akustinių ypatybių analizė". 20th Computer Science Scientific Conference, Computer Days – 2021, September 23-24, 2021, Klaipėda: KU, Lithuania
  12. G. Korvel, P. Treigys, B. Kostek. "Akustinių parametrų panašumo matricos taikymas tarpkalbiniams fonemų skirutumams išryškinti". The 62th Conference of Lithuanian Mathematical Society, June 16–17, 2021, Vilnius: VGTU, Lithuania.
  13. G. Korvel, B. Kostek „Discovering rule-based learning systems for the purpose of music analysis“, 178th Meeting of the Acoustical Society of America, 2–6 December 2019, San Diego, California
  14. Tamulevičius, G. Korvel, J. Bernatavičienė, P. Treigys “The Impact of Data Augmentation Based on White Noise for Noise-Robust CNN-Based Speech Recognition” 11th International Workshop on Data Analysis Methods for Software Systems, November 28 – 30, 2019, Druskininkai, Lithuania
  15. Korvel, K. Kąkol, B. Kostek “Evaluation of Lombard Speech Models in the Context of Speech Enhancement” 11th International Workshop on Data Analysis Methods for Software Systems, November 28 – 30, 2019, Druskininkai, Lithuania
  16. G. Navickas, G. Korvel, J. Bernataviciene “Overview of speech synthesis using LSTM neural networks” Computer Data Analysis and Modeling: Stochastics and Data Science : Proc. of the Twelfth Intern. Conf., Minsk, Sept. 18-22, 2019. – Minsk : BSU, 2019. – P. 257-261.
  17. G Korvel, O Kurasova, B Kostek "An Attempt to Create Speech Synthesis Model That Retains Lombard Effect Characteristics". The 16th International Conference on Signal Processing and Multimedia Applications, SIGMAP 2019, 26-28 July, Prague, Czech Republic.
  18. G. Korvel, P. Treigys, G. Tamulevičius, J. Bernatavičienė, B. Kostek "Giliojo mokymo algoritmų taikymas lietuvių šnekos atpažinimo uždaviniuose". The 60th Conference of Lithuanian Mathematical Society, June 19–20, 2019, Vilnius: LKA, Lithuania.
  19.  K. Kąkol, G. Korvel, B. Kostek “Analysis of Lombard speech using parameterization and the objective quality indicators in noise conditionse”. 10th International Workshop on Data Analysis Methods for Software Systems, November 29 – December 1, 2018, Druskininkai, Lithuania
  20. G. Korvel, G. Tamulevičius, P. Treigys, J. Bernatavičienė, B. Kostek “Investigating Feature Spaces for Isolated Word Recognition”. 10th International Workshop on Data Analysis Methods for Software Systems, November 29 – December 1, 2018, Druskininkai, Lithuania
  21. M. Piotrowska, G. Korvel, A. Kurowski, B/ Kostek, A. Czyzewski "Machine Learning Applied to Aspirated and Non-Aspirated Allophone Classification–An Approach Based on Audio “Fingerprinting”", Audio Engineering Society Convention 145, October 17–20, 2018, New York, USA
  22. G Korvel, O Kurasova, B Kostek. „Comparative Analysis of Spectral and Cepstral Feature Extraction Techniques for Phoneme Modelling“. International Conference on Multimedia and Network Informa5on System, 12-14 September 2018, Wrocław, Poland
  23. M. Piotrowska, G. Korvel, B. Kostek, A. Rojczyk, A. Czyżewski "Objectivization of phonological evaluation of speech elements by means of audio parametrization", 11th International Conference on Human System Interaction (HSI), July 4-6, 2018, Gdansk, Poland
  24. G. Korvel, B. Kostek "Examining feature vector for phoneme recognition",  IEEE International Symposium on Signal Processing and Information Technology, December 18-20, 2017, Bilbao, Spain
  25. G. Korvel, P. Treigys, G. Tamulevičius „An Initial Investigation of Keyword Spotting using Convolutional Neural Network“, 9th International Workshop on Data Analysis Methods for Software Systems, 30 November – 2 December, 2017, Druskininkai, Lithuania
  26. G. Korvel “Parameter investigation of speech signals”, The 58th Conference of Lithuanian Mathematical Society, June 26–27, 2017, Vilnius: VU, Lithuania.
  27. G. Korvel “Analysis and synthesis of Lithuanian consonants”, The 8th International Workshop Data Analysis Methods for Software Systems, December 1–3, 2016, Druskininkai, Lithuania
  28. G. Korvel “Developing mathematical models for speech sounds”, The 10th International Scientific Congress of Societas Humboldtiana Polonorum,  30 Juny – 2 July, 2016, Lodz, Poland
  29. G. Korvel, V. Šimonytė, V. Slivinskas “Mathematical modelling of Lithuanian speech consonants”,  The 55th Conference of Lithuanian Mathematical Society, June 26–27, 2014, Vilnius: MRU, Lithuania
  30. G. Korvel, V. Šimonytė, V. Slivinskas, “Random sequences analysis in excel using NUMXL” The 15th International Conference Teaching Mathematics: Retrospective and Perspectives, May 8–10, 2014, Liepaja, Latvia
  31. G. Korvel, V. Šimonytė, V. Slivinskas “Using Accord.Math library for the solution of mathematical modelling tasks” ” The 15th International Conference Teaching Mathematics: Retrospective and Perspectives, May 8–10, 2014, Liepaja, Latvia
  32. V. Slivinskas, G. Korvel, V. Šimonytė “Problems of Lithuanian speech synthesis”, The 5th International Workshop Data Analysis Methods for Software Systems, December 5–7, 2013, Druskininkai, Lithuania.
  33. 16th Computer Science Scientific Conference, Computer Days – 2013, September 19-21, 2013, Šiauliai: ŠU, Lithuania
  34. The 54th Conference of Lithuanian Mathematical Society, June 19–20, 2013, Vilnius: LEU, Lithuania
  35. The 14th International Conference Teaching Mathematics: Retrospective and Perspectives, May 9–11, 2013, Jelgava, Latvia.
  36. The 8th International Conference on Electrical and Control Technologies ECT-2013, May 2–3, 2013, Kaunas, Lithuania.
  37. The 3rd young scientist conference: Interdisciplinary research in physical and technological sciences, 12 February, 2013, Lithuanian Academy of Sciences, Lithuania
  38. The 3rd International Doctoral Consortium Informatics and Informatics Engineering Education Research: Methodologies, Methods, and Practice, December 3–7, 2012, Druskininkai, Lithuania
  39. The 2nd International Conference Music and Technologies, November 8–10, 2012, Kaunas, Lithuania.
  40. The 16th International Conference ELECTRONICS'2012, June 18–20, 2012, Palanga, Lithuania.
  41. The 53th Conference of Lithuanian Mathematical Society, June 11–12, 2012, Klaipėda: KU, Lithuania.
  42. The 13th International conference Teaching Mathematics: Retrospective and Perspectives, 30 May–1 June, 2012, Tartu, Estonia.
  43. The 7th International Conference on Electrical and Control Technologies ECT-2012, May 3–4, 2012, Kaunas, Lithuania.
  44. The 2nd young scientist conference: Interdisciplinary research in physical and technological sciences, 14 February, 2012, Lithuanian Academy of Sciences, Lithuania
  45. The 2nd International Doctoral Consortium Informatics and Informatics Engineering Education Research: Methodologies, Methods, and Practice, November 30–December 4, 2011, Druskininkai, Lithuania.
  46. 15th Computer Science Scientific Conference, Computer Days – 2011, September 22-24, 2011, Klaipėda: KU, Lithuania
  47. The 52th Conference of Lithuanian Mathematical Society, June 16–17, 2011, Vilnius: LKA, Lithuania.
  48. The 6th International Conference on Electrical and Control Technologies ECT-2011, May 5–6, 2011, Kaunas, Lithuania.
  49. The 1st young scientist conference: Interdisciplinary research in physical and technological sciences, 8 February, 2011, Lithuanian Academy of Sciences, Lithuania
  50. International Conference of Young Scientists, April 29–30, 2010, Šiauliai, Lithuania
  51. The 5th International Conference Mechatronic Systems and Materials, October 22–25, 2009, Vilnius, Lithuania.
  52. The 50th Conference of Lithuanian Mathematical Society, June 18–19, 2009, Vilnius: MII, Lithuania

 

Scientific and other projects

The project of Research Council of Lithuania "Research on propaganda and disinformation: automatic recognition by machine learning, impact and societal resilience", 2023-09-01-2026-06-30, position: principal researcher.

COST action CA21167 "Universality, diversity and idiosyncrasy in language technology (UniDive)", 2022.09-2026.09, position: MC Member.

Postdoctoral Project “Investigating speech in the presence of noise interferences employing signal processing and machine learning methods”, 2021-07-2023.07, position: researcher.

COST action CA18231 "Multi3Generation: Multi-task, Multilingual, Multi-modal Language Generation", 2019-2023, position: MC Member.

Postdoctoral Project “Analysis and Modeling of Promises Using the Joint Additive Synthesis and Source-Filter Model Method”, 2018.12-2019.12, position: researcher.

Projects of EU Structural Funds LIEPA2, 2017.12-2020.12, position: senior researcher.

COST action CA15225 "Fractional-order systems - analysis, synthesis and their importance for future design", 2016-2020, position: MC Substitute.

Projects of EU Structural Funds LIEPA (Services Controlled by Lithuanian Voice), 2013-2015, position: project expert.

professional development

2023

Scientific training at Gdansk University of Technology, Poland
Period: 19 June - 1 July, Advisor: Prof. dr. hab. Inż. Bożena Kostek

Short-term scientific missions (STSM) at The International Hellenic University (IHU), Greece
Period: 15-20 May, Advisor: Prof. Konstantinos I. Diamantaras

Erasmus staff training visit to the Technical University of Košice (Slovakia), February 13-17

2022

Scientific training at Gdansk University of Technology, Poland
Period: 20 June - 9 July , 31 October - 5 November
Advisor: Prof. dr. hab. Inż. Bożena Kostek

2021 m.

The 11th Lisbon Machine Learning School – LxMLS 2021, July 7–15, 2021, Lisbon, Portugal

 

2019

Scientific training at Gdansk University of Technology, Poland
Period: 21 May - 15 June, 8-13 September, 22-27 September
Advisor: Prof. dr. hab. Inż. Bożena Kostek

 
Erasmus Teaching Visit to University of Maribor (Slovenia), 2019 April 15-19
Subject field “Signal processing and sound synthesis”
 

2018

Scientific training at Gdansk University of Technology, Poland
Periods: 15 - 27 Januar, 15 April - 12 May, 2 - 27 October
Advisor: Prof. dr. hab. Inż. Bożena Kostek

2017

Scientific training at Gdansk University of Technology, Poland
Periods: 18 April - 18 Jun, 4-30 September, 23 October – 22 November
Advisor: Prof. dr. hab. Inż. Bożena Kostek

ERASMUS teaching visit at Gdansk University of Technology, Poland, 16-20 October
Subject field “Signal processing and sound synthesis”

2016

ERASMUS teaching visit at Gdansk University of Technology, Poland, 12-17 December
Subject field “Signal processing and sound synthesis”

2012

The 8th Joint European Summer School on Technology Enhanced Learning, May 21–25, 2012, Estoril, Portugal.

 

Honours and Awards

2022

Best Poster Award, 13th International Workshop on Data Analysis Methods for Software Systems,  Druskininkai, Lithuania

2019

Winner of the INFOBALT scholarship for young scientists. The presented work “Comparative analysis of Lithuanian consonant phoneme features”

Laureate of the 9rd young scientist conference “Interdisciplinary research in physical and technological sciences”, Lithuanian Academy of Sciences, Lithuania

2018

Best Poster Award, 10th International Workshop on Data Analysis Methods for Software Systems,  Druskininkai, Lithuania

2016

Certificate of Distinction for superior performance at the Young Researcher’s poster presentation, 10th International Scientific Congress of Societas Humboldtiana Polonorum, Lodz, Poland

2014

Certificate of merit for scientific work „Analysis and synthesis of Lithuanian phoneme dynamic sound models”, Lithuanian Academy of Sciences, Lithuania

2013

Diploma for the best presentation, 3rd young scientist conference “Interdisciplinary research in physical and technological sciences”, Lithuanian Academy of Sciences, Lithuania