Thomas Niesler : Research Publications :Conference papers

  1. Menon, R; Saeb, A; Cameron, H; Kibira, W; Quinn, J; Niesler, T.R. Radio-browsing for Developmental Monitoring in Uganda . Proceedings of the Pattern Recognition Association of South Africa and Robotics and Mechatronics International Conference (PRASA-RobMech), Stellenbosch, South Africa, 2016. Proceedings of the 42nd IEEE International Conference on Acoustics, Speech and Signal Processing, New Orleans, USA, March 2017. ISBN: 978-1-5090-4116-9.

  2. Wolfaardt, C.J; Davidson, D.B; Niesler, T.R. Statistical classification of radio frequency interference (RFI) in a radio astronomy environment . Proceedings of the Pattern Recognition Association of South Africa and Robotics and Mechatronics International Conference (PRASA-RobMech), Stellenbosch, South Africa, 2016.

  3. van der Westhuizen, E; Niesler, T.R. The Effect of Postlexical Deletion on Automatic Speech Recognition in Fast Spontaneously Spoken Zulu . Proceedings of Interspeech, San Fransisco, USA, 2016.

  4. van der Westhuizen, E; Niesler, T.R. Automatic Speech Recognition of English-isiZulu Code-switched Speech from South African Soap Operas . Proceedings of the fifth Workshop on Spoken Language Technology for Under-resourced Languages (SLTU), Yogyakarta, Indonesia, 2016.

  5. Agenbag, W; Niesler, T.R. Refining sparse coding sub-word unit inventories with lattice-constrained Viterbi training . Proceedings of the fifth Workshop on Spoken Language Technology for Under-resourced Languages (SLTU), Yogyakarta, Indonesia, 2016.

  6. Rademan, C.F; Niesler, T.R. Improved Visual Speech Synthesis using Dynamic Viseme k-means Clustering and Decision Trees . Proceedings of the first Joint Conference on Facial Analysis, Animation and Auditory-Visual Speech Processing (FAAVSP), Vienna, Austria, 2015.

  7. Agenbag, W; Niesler, T.R. Automatic segmentation and clustering of speech using sparse coding and metaheuristic search . Proceedings of Interspeech, Dresden, Germany, 2015.

  8. van Vuuren, V.Z; ten Bosch, L.F.M; Niesler, T.R. Unconstrained Speech Segmentation using Deep Neural Networks . Proceedings of the 4th International Conference on Pattern Recognition Application and Methods (ICPRAM), Lisbon, Portugal, 2015. ISBN 978-989-758-076-5.

  9. Agenbag, W; Smit, W; Niesler, T.R. Automatic Segmentation and Clustering of Speech using Sparse Coding . Proceedings of the twenty-fifth annual symposium of the Pattern Recognition Association of South Africa (PRASA), Cape Town, South Africa, 2014. ISBN 978-0-620-62617-0.

  10. Marais, J; le Roux, S.P; Wolhuter, R; Niesler, T.R. Automatic classification of sheep behaviour using 3-axis accelerometer data . Proceedings of the twenty-fifth annual symposium of the Pattern Recognition Association of South Africa (PRASA), Cape Town, South Africa, 2014. ISBN 978-0-620-62617-0.

  11. Mohasi, L; Secujski, M; Mak, R; Niesler, T.R. A Comparison of two prosody modelling approaches for Sesotho and Serbian. Proceedings of the 16th International Conference on Speech and Computer (SPECOM), Novi Sad, Serbia, 2014.

  12. Mohasi, L; Mixdorf, H; Niesler, T.R. Perceptual evaluation of the effect of mismatched Fujisaki model commands and surface tone in Sesotho . Proceedings of Speech Prosody 7, Dublin, Ireland, 2014.

  13. Henselmans, D; van Leeuwen, D; Niesler, T.R. Baseline Speech Recognition of South African Languages using Lwazi and AST. Proceedings of the twenty-fourth annual symposium of the Pattern Recognition Association of South Africa (PRASA), Johannesburg, South Africa, 2013. ISBN 978-0-86970-771-5.

  14. Henselmans, D; van Leeuwen, D; Niesler, T.R. Phoneme- and Word-based Language Identification of South African Languages using Lwazi . Proceedings of the twenty-fourth annual symposium of the Pattern Recognition Association of South Africa (PRASA), Johannesburg, South Africa, 2013. ISBN 978-0-86970-771-5.

  15. van Vuuren, VZ; ten Bosch, L; Niesler, T.R. A Dynamic Programming Framework for Neural Network-Based Automatic Speech Segmentation. Proceedings of Interspeech, Lyon, France, 2013. ISSN 2308-457X.

  16. van Vuuren, VZ; ten Bosch, L; Niesler, T.R. Automatic segmentation of TIMIT by dynamic programming. Proceedings of the twenty-third annual symposium of the Pattern Recognition Association of South Africa (PRASA), Pretoria, 2012. ISBN 978-0-620-54601-0.

  17. Kamper, H; Niesler, TR. Optimisation of acoustic models for a target accent using decision-tree state clustering. Proceedings of the twenty-third annual symposium of the Pattern Recognition Association of South Africa (PRASA), Pretoria, 2012. ISBN 978-0-620-54601-0.

  18. Lerato, L; Niesler, TR. Investigating parameters for unsupervised clustering of speech segments using TIMIT. Proceedings of the twenty-third annual symposium of the Pattern Recognition Association of South Africa (PRASA), Pretoria, 2012. ISBN 978-0-620-54601-0.

  19. Mohasi, L; Mixdorff, H.J; Niesler, T.R; Zerbian, S. Analysis of Sesotho tone using the Fujisaki model,  Proceedings of the 3rd international Symposium on Tonal Aspects of languages (TAL), Nanjing, China, 2012.
  20. Kamper, H; de Wet, F; Hain,; Niesler, T.R. Automatic transcription of South African broadcast news. Proceedings of the third International Workshop on Spoken Languages Technologies for Under-resourced Languages (SLTU), Cape Town, 2012.  ISBN  978-1-86822-615-3.
  21. Kamper, H; Niesler, T.R. Accent reclassification and speech recognition of Afrikaans, Black and White South African English, Proceedings of the twenty-second annual symposium of the Pattern Recognition Association of South Africa (PRASA), Johannesburg, 2011. ISBN 978-0-620-51914-4.
  22. de Wet, F; Muller, P; van der Walt, C; Niesler, T.R. Readability index as a design criterion for elicited imitation tasks in automatic oral proficiency assessment. ISCA Workshop on Speech and Language Technology in Education (SLaTE), Venice, Italy, 2011.
  23. Mixdorff, H; Mohasi, L; Machobane, M; Niesler, T.R. A Study on the Perception of Tone and Intonation in Sesotho,  Proceedings of Interspeech, Florence, Italy, August 2011. ISSN 1990-9772.
  24. Kamper, H; Niesler, T.R. Multi-accent speech recognition of Afrikaans, Black and White varieties of South African English, Proceedings of Interspeech, Florence, Italy, August 2011. ISSN 1990-9772.
  25. Mohasi, L;  Mixdorff, H;  Niesler, T.R.  An acoustic analysis of tone in Sesotho, Proceedings of the 17th International Congress of Phonetic Sciences (ICPhS), Hong Kong, 2011
  26. de Villiers, H.A.C; Niesler, T.R; van Zijl, L. Balancing Runtime Space- and Time Complexity in Synthetic Database Driven Hand Posture Reconstruction Systems, Proceedings of the twenty-first annual symposium of the Pattern Recognition Association of South Africa (PRASA), Stellenbosch, South Africa, November 2010.  ISBN 978-0-7992-2470-2.
  27. de Wet, F; Muller, P; van der Walt, C; Niesler, T.R. Segmentation and accuracy-based scores for the automatic assessment of oral proficiency for proficient L2 speakers, Proceedings of the twenty-first annual symposium of the Pattern Recognition Association of South Africa (PRASA), Stellenbosch, South Africa, November 2010. ISBN 978-0-7992-2470-2.
  28. Goussard, G.W; Niesler, T.R. Automatic discovery of subword units and pronunciations for automatic speech recognition using TIMIT, Proceedings of the twenty-first annual symposium of the Pattern Recognition Association of South Africa (PRASA), Stellenbosch, South Africa, November 2010. ISBN 978-0-7992-2470-2.
  29. Kamper, H; Muamba Mukanya, F;  Niesler, T.R. Acoustic modelling of English-accented and Afrikaans-accented South African English, Proceedings of the twenty-first annual symposium of the Pattern Recognition Association of South Africa (PRASA), Stellenbosch, South Africa, November 2010. ISBN 978-0-7992-2470-2.
  30. Loots, L; de Wet, F; Niesler, T.R. Extending an Afrikaans pronunciation dictionary using Dutch resources and P2P/GP2P, Proceedings of the twenty-first annual symposium of the Pattern Recognition Association of South Africa (PRASA), Stellenbosch, South Africa, November 2010. ISBN 978-0-7992-2470-2.
  31. Loots, L; Niesler, T.R. Comparing direct G2P with G2P followed by accent conversion when determining pronunciations for South African English, Proceedings of the twenty-first annual symposium of the Pattern Recognition Association of South Africa (PRASA), Stellenbosch, South Africa, November 2010. ISBN 978-0-7992-2470-2.
  32. Loots, L; Davel, M; Barnard, E; Niesler, T.R. Comparing manually-developed and data-driven rules for P2P learning. Proceedings of the Twentieth annual symposium of the Pattern Recognition Association of South Africa (PRASA), Stellenbosch, South Africa, November 2009. ISBN 978-0-7992-2356-9.
  33. Kamper, H; Niesler, T.R. Characterisation and simulation of telephone channels using the TIMIT and NTIMIT databases. Proceedings of the Twentieth annual symposium of the Pattern Recognition Association of South Africa (PRASA), Stellenbosch, South Africa, November 2009. ISBN 978-0-7992-2356-9.
  34. Loots, L; Niesler, T.R. Data-driven Phonetic Comparison and Conversion between South African, British and American English Pronunciations. Proceedings of Interspeech, Brighton, UK,  September 2009. ISSN 1990-9772.
  35. Muller, P; De Wet, F; van der Walt, C; Niesler, T.R; Automatically assessing the oral proficiency of proficient L2 speakers. ISCA Workshop on Speech and Language Technology in Education (SLaTE), Warwickshire, UK, 2009.
  36. De Wet, F; Muller, P; van der Walt, C; Niesler, T.R; Experiments in automatic assessment of oral proficiency and listening comprehension for bilingual South African speakers of English. Proceedings of the Nineteenth annual symposium of the Pattern Recognition Association of South Africa (PRASA), Cape Town, South Africa, November 2008.  ISBN 978-0-7992-2350-7.
  37. Niesler, T; de Wet, F; Accent identification in the presence of code-mixing. Odyssey 2008 Speaker and Language Recognition Workshop, Stellenbosch, South Africa, January 2008. ISBN 978-0-620-40331-3.
  38. De Wet, F; Van der Walt, C; Niesler, T.R; Automatic large-scale oral language proficiency assessment. Proceedings of the eighth annual conference of the International Speech Communication Association (Interspeech), Antwerp, Belgium, August 2007, pp. 218-221. ISSN 1990-9772.
  39. Klompje, G; Niesler, T.R; A parametric monophone speech synthesis system. Proceedings of the seventeenth annual symposium of the Pattern Recognition Association of South Africa (PRASA), Parys, South Africa, November 2006.  ISBN 0-6203-7384-9.
  40. Krige, W.A; Niesler, T.R; An HMM Based Singing Transcription System. Proceedings of the seventeenth annual symposium of the Pattern Recognition Association of South Africa (PRASA), Parys, South Africa, November 2006.  ISBN 0-6203-7384-9.
  41. De Wet, F; Louw, P.H; Niesler, T.R;  The design, collection and annotation of speech databases in South Africa.  Proceedings of the seventeenth annual symposium of the Pattern Recognition Association of South Africa (PRASA), Parys, South Africa, November 2006.  ISBN 0-6203-7384-9.
  42. De Wet, F; Niesler, T.R; Louw, P.H; Nguni and Sotho varieties of South African English - distant cousins or twins?  ISCA Tutorial and Research Workshop (ITRW) on Multilingual Speech and Language Processing (MULTILING-2006), 9-11 April, Stellenbosch, South Africa. 
  43. Niesler, T.R; Willett, D; Language identification and multilingual speech recognition using discriminatively trained acoustic models. ISCA Tutorial and Research Workshop (ITRW) on Multilingual Speech and Language Processing (MULTILING-2006), 9-11 April, Stellenbosch, South Africa.
  44. Niesler, T.R; Language-dependent state clustering for multilingual speech recognition in Afrikaans, South African English, Xhosa and Zulu.  ISCA Tutorial and Research Workshop (ITRW) on Multilingual Speech and Language Processing (MULTILING-2006), 9-11 April, Stellenbosch, South Africa.
  45. Muller, J.J; Niesler, T.R; Development of a USB Telephony Interface Device for Speech Recognition Applications.  Proceedings of the Southern African Telecommunications Networks and Applications Conference (SATNAC), Central Drakensberg, KwaZulu-Natal, South Africa, September 2005. ISBN 0-6203-4908-5.
  46. Roux, J.C; Louw, P.H; Niesler, T.R; The African Speech Technology Project: An Assessment.  Proceedings of the fourth international conference on language resources and evaluation (LREC), Lisbon, May 2004, pp. 93-96. ISBN 2-9517-4081-6.
  47. Willett, D; Niesler, T.R; McDermott, E; Minami, Y; Katagiri, Y; Pervasive unsupervised adaptation for lecture speech transcription.  Proceedings of the IEEE International Conference on Acoustics, Speech and Signal Processing, Hong Kong, March 2003, pp. 292-295. ISBN 0-7803-7664-1.
  48. Niesler, T.R; Willett, D; Unsupervised language model adaptation for lecture speech transcription.  Proceedings of the Seventh International Conference on Spoken Language Processing, Denver, September 2002, pp. 1413-1416. ISBN 1-8763-4640-X.
  49. Niesler, T.R; Roux, J.C; Natural language understanding in the DACST-AST dialogue system.  Proceedings of the twelfth annual symposium of the Pattern Recognition Association of South Africa (PRASA), Franchhoek, November 2001, pp. 134-136. ISBN 1-8685-4417-6.
  50. Woodland, P.C; Odell, J.J; Hain, T; Moore, G.L; Niesler, T.R; Tuerk, A; Whittaker, E.W.D. Improvements in accuracy and speed in the HTK Broadcast News transcription system , Proceedings of Eurospeech, Budapest, Hungary, September 1999, pp. 1043-1046. ISSN 1018-4074.
  51. Hain, T; Woodland, P.C; Niesler, T.R; Whittaker, E.W.D. The 1998 HTK System for Transcription of Conversational Telephone Speech , Proceedings of the IEEE International Conference on Acoustics, Speech and Signal Processing, Phoenix, Arizona, March 1999, pp. 57-60. ISBN 1-8763-4619-1.
  52. Woodland, P.C; Hain, T; Moore, G.L; Niesler, T.R; Povey, D; Tuerk, A; Whittaker, E.W.D. The 1998 HTK Broadcast News transcription system: development and results , Proceedings of the 1999 DARPA Broadcast News Workshop, Hendon, Virginia, Feburary 1999, pp. 265-270. ISBN 1-5586-0638-6.
  53. Niesler, T.R; Whittaker, E.W.D; Woodland, P.C; Comparison of part-of-speech and automatically derived category-based language models for speech recognition. Proceedings of the IEEE International Conference on Acoustics, Speech and Signal Processing, Seattle, May 1998, pp. 177-180. ISBN 0-8763-4610-8.
  54. Woodland, P.C; Hain, T; Johnson, S.E; Niesler, T.R; Tuerk, A; Young, S.J.  Experiments in Broadcast News Transcription , Proceedings of the IEEE International Conference on Acoustics, Speech and Signal Processing, Seattle, May 1998, pp. 909-912. ISBN 0-8763-4610-8.
  55. Woodland, P.C; Hain, T; Johnson, S.E; Niesler, T.R; Tuerk, A; Whittaker, E.W.D; Young, S.J.  The 1997 HTK Broadcast News Transcription System , Broadcast News Transcription and Understanding Workshop, Lansdowne, Virginia, February 1998. ISBN 1-5586-0564-9.
  56. Niesler, T.R; Woodland, P.C; Modelling word-pair relations in a category-based language model.  Proceedings of the IEEE International Conference on Acoustics, Speech and Signal Processing, Munich, April 1997, pp. 795-798. ISBN 0-6463-1303-7.
  57. Niesler, T.R; Woodland, P.C; Combination of word-based and category-based language models.  Proceedings of the Fourth International Conference on Spoken Language Processing, Philadelphia, October 1996, pp. 220-223. ISBN 0-7803-3555-4.
  58. Niesler, T.R; Woodland, P.C; A variable-length category-based n-gram language model.  Proceedings of the IEEE International Conference on Acoustics, Speech and Signal Processing, Atlanta, April 1996, pp. 164-167. ISBN 0-7803-3193-1.