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The Spoken Web Search task at Mediaeval 2012
(Acoustics, Speech and Signal Processing (ICASSP), 2013 IEEE International Conference on, 2013)
In this paper, we describe the “Spoken Web Search” Task, which
was held as part of the 2012 MediaEval benchmark evaluation campaign.
The purpose of this task was to perform audio search with audio
input in four languages, ...
Towards lecture transcription in resource-scarce environments
(Pattern recognition association of South Africa (PRASA), 2012)
We present progress towards automated Lecture Transcription (LT) in resource scarce environments. Our development has focused on the transcription of lectures in Afrikaans from two faculties at North-West University. A ...
The NCHLT Speech Corpus of the South African languages
(Workshop Spoken Language Technologies for Under-resourced Languages (SLTU), 2014)
The NCHLT speech corpus contains wide-band speech from approximately
200 speakers per language, in each of the eleven
official languages of South Africa. We describe the design and
development processes that were ...
Language Independent Search in MediaEval's Spoken Web Search Task
(Elsevier Ltd., 2014)
In this paper, we describe several approaches to language-independent spoken term detection and compare their performanceon a common task, namely “Spoken Web Search”. The goal of this part of the MediaEval initiative is ...
A Discourse Model of Affect for Text-to-Speech Synthesis
(Pattern Recognition Association of South Africa and Mechatronics International Conference, 2013)
This paper introduces a model of affect to improve
prosody in text-to-speech synthesis. It operates on the discourse
level of text to predict the underlying linguistic factors that contribute
towards emotional appraisal, ...
G2P variant prediction techniques for ASR and STD
(Interspeech 2013, 2013)
Introducing pronunciation variants into a lexicon is a balancing
act: incorporating necessary variants can improve automatic
speech recognition (ASR) and spoken term detection (STD)
performance by capturing some of the ...
The semi-automated creation of stratified speech corpora
(Pattern recognition association of South Africa (PRASA), 2013)
Smartphones provide an efficient means for the collection of speech data; however, the quality of the corpora created in this fashion is not predictable. We describe an approach that allows us to post-process and rank ...
Classifying recognised speech with deep neural networks
(Southern African Conference for Artificial Intelligence Research, 2020)
We investigate whether word embeddings using deep neural networks can assist in the analysis of text produced by a speechrecognition system. In particular, we develop algorithms to identify which words are incorrectly ...
Optimising word embeddings for recognised multilingual speech
(Southern African Conference for Artificial Intelligence Research, 2020)
Word embeddings are widely used in natural language processing (NLP) tasks. Most work on word embeddings focuses on monolingual languages with large available datasets. For embeddings to be useful in a multilingual ...
Benign interpolation of noise in deep learning
(South African Institute of Computer Scientists and Information Technologists, 2020)
The understanding of generalisation in machine learning is in a state of flux, in part due to the ability of deep learning models to interpolate noisy training data and still perform appropriately on out-of-sample data, ...