Charl Johannes van Heerden

According to our database, Charl Johannes van Heerden authored at least 26 papers between 2007 and 2022.

Collaborative distances:

• Dijkstra number of four.
• Erdős number of four.

2022

Efficient acoustic feature transformation in mismatched environments using a Guided-GAN.

Walter Heymans, Marelie H. Davel, Charl Johannes van Heerden

Speech Commun., 2022

2021

Multi-style Training for South African Call Centre Audio.

Walter Heymans, Marelie H. Davel, Charl Johannes van Heerden

Proceedings of the Artificial Intelligence Research - Second Southern African Conference, 2021

2020

The South African directory enquiries (SADE) name corpus.

Jan W. F. Thirion, Charl Johannes van Heerden, Oluwapelumi Giwa, Marelie H. Davel

Lang. Resour. Evaluation, 2020

Language Modeling for Speech Analytics in Under-Resourced Languages.

Simone Wills, Pieter Uys, Charl Johannes van Heerden, Etienne Barnard

Proceedings of the Interspeech 2020, 2020

2017

Rapid Development of TTS Corpora for Four South African Languages.

Daniel R. van Niekerk, Charl Johannes van Heerden, Marelie H. Davel, Neil Kleynhans, Oddur Kjartansson, Martin Jansche, Linne Ha

Proceedings of the Interspeech 2017, 2017

Constructing sub-word units for spoken term detection.

Charl Johannes van Heerden, Damianos G. Karakos, Karthik Narasimhan, Marelie H. Davel, Richard M. Schwartz

Proceedings of the 2017 IEEE International Conference on Acoustics, 2017

2016

Code-switched English Pronunciation Modeling for Swahili Spoken Term Detection.

Neil Kleynhans, William Hartmann, Daniel R. van Niekerk, Charl Johannes van Heerden, Richard M. Schwartz, Stavros Tsakalidis, Marelie H. Davel

Proceedings of the SLTU-2016, 2016

Improving the Lwazi ASR Baseline.

Charl Johannes van Heerden, Neil Kleynhans, Marelie H. Davel

Proceedings of the Interspeech 2016, 2016

2015

Exploring minimal pronunciation modeling for low resource languages.

Marelie H. Davel, Etienne Barnard, Charl Johannes van Heerden, William Hartmann, Damianos G. Karakos, Richard M. Schwartz, Stavros Tsakalidis

Proceedings of the INTERSPEECH 2015, 2015

2014

The NCHLT speech corpus of the South African languages.

Etienne Barnard, Marelie H. Davel, Charl Johannes van Heerden, Febe de Wet, Jaco Badenhorst

Proceedings of the 4th Workshop on Spoken Language Technologies for Under-resourced Languages, 2014

2013

G2p variant prediction techniques for ASR and STD.

Marelie H. Davel, Charl Johannes van Heerden, Etienne Barnard

Proceedings of the INTERSPEECH 2013, 2013

2012

Medium-vocabulary speech recognition for under-resourced languages.

Charl Johannes van Heerden, Marelie H. Davel, Etienne Barnard

Proceedings of the Third Workshop on Spoken Language Technologies for Under-resourced Languages, 2012

Validating smartphone-collected speech corpora.

Marelie H. Davel, Charl Johannes van Heerden, Etienne Barnard

Proceedings of the Third Workshop on Spoken Language Technologies for Under-resourced Languages, 2012

The Spoken Web Search Task.

Florian Metze, Etienne Barnard, Marelie H. Davel, Charl Johannes van Heerden, Xavier Anguera, Guillaume Gravier, Nitendra Rajput

Proceedings of the Working Notes Proceedings of the MediaEval 2012 Workshop, 2012

The Spoken Web Search Task at MediaEval 2011.

Florian Metze, Nitendra Rajput, Xavier Anguera, Marelie H. Davel, Guillaume Gravier, Charl Johannes van Heerden, Gautam Varma Mantena, Armando Muscariello, Kishore Prahallad, Igor Szöke, Javier Tejedor

Proceedings of the 2012 IEEE International Conference on Acoustics, 2012

2011

Collecting and evaluating speech recognition corpora for 11 South African languages.

Jaco Badenhorst, Charl Johannes van Heerden, Marelie H. Davel, Etienne Barnard

Lang. Resour. Evaluation, 2011

Efficient Harvesting of Internet Audio for Resource-Scarce ASR.

Marelie H. Davel, Charl Johannes van Heerden, Neil Kleynhans, Etienne Barnard

Proceedings of the INTERSPEECH 2011, 2011

2010

Pooling ASR data for closely related languages.

Charl Johannes van Heerden, Neil Kleynhans, Etienne Barnard, Marelie H. Davel

Proceedings of the 2nd Workshop on Spoken Language Technologies for Under-Resourced Languages, 2010

Voice search for development.

Etienne Barnard, Johan Schalkwyk, Charl Johannes van Heerden, Pedro J. Moreno

Proceedings of the INTERSPEECH 2010, 2010

Combining regression and classification methods for improving automatic speaker age recognition.

Charl Johannes van Heerden, Etienne Barnard, Marelie H. Davel, Christiaan van der Walt, Ewald van Dyk, Michael Feld, Christian A. Müller

Proceedings of the IEEE International Conference on Acoustics, 2010

2009

Language modeling for what-with-where on GOOG-411.

Charl Johannes van Heerden, Johan Schalkwyk, Brian Strope

Proceedings of the INTERSPEECH 2009, 2009

Basic speech recognition for spoken dialogues.

Charl Johannes van Heerden, Etienne Barnard, Marelie H. Davel

Proceedings of the INTERSPEECH 2009, 2009

ASR corpus design for resource-scarce languages.

Etienne Barnard, Marelie H. Davel, Charl Johannes van Heerden

Proceedings of the INTERSPEECH 2009, 2009

Multilingual speaker age recognition: Regression analyses on the Lwazi corpus.

Michael Feld, Etienne Barnard, Charl Johannes van Heerden, Christian A. Müller

Proceedings of the 2009 IEEE Workshop on Automatic Speech Recognition & Understanding, 2009

2008

Speaker-specific variability of phoneme durations.

Charl Johannes van Heerden, Etienne Barnard

South Afr. Comput. J., 2008

2007

Durations of Context-Dependent Phonemes: A New Feature in Speaker Verification.

Charl Johannes van Heerden, Etienne Barnard

Proceedings of the Speaker Classification II, 2007