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Efficiency measurements in IVR systems for oral users: Consequences of differences in educational levels
(South African Inst. for Computer Scientists and Information Technologists Conf. (SAICSIT), 2011)
In this paper we present the development of an Interactive Voice Response (IVR) system that enables its users to obtain soccer results. The objective of the study is to evaluate the usability of the system through experiments ...
Efficient harvesting of Internet audio for resource-scarce ASR
(Interspeech 2011, 2011)
Spoken recordings that have been transcribed for human reading
(e.g. as captions for audiovisual material, or to provide alternative
modes of access to recordings) are widely available in many
languages. Such recordings ...
Influence of input matrix representation on topic modelling performance
(Pattern Recognition Association of South Africa and Mechatronics International Conference, 2010)
Topic models explain a collection of documents with
a small set of distributions over terms. These distributions over
terms define the topics. Topic models ignore the structure of
documents and use a bag-of-words approach ...
Speech systems for autonomous unmanned aircraft: Enabling autonomous unmanned aircraft to communicate in civil airspace
(Aerospace Symp. of South Africa (IASSA), 2011)
Airspace control is currently based largely on the
exchange of speech between aircraft and Air Traffic Service
Units, or between aircraft themselves. ICAO regulatory
guidelines make no distinction between unmanned ...
Visualizing data in high-dimensional spaces
(Pattern Recognition Association of South Africa and Mechatronics International Conference, 2010)
A novel approach to the analysis of feature spaces in
statistical pattern recognition is described. This approach starts
with linear dimensionality reduction, followed by the computation
of selected sections through and ...
Maximum leave-one-out likelihood for kernel density estimation
(Pattern Recognition Association of South Africa and Mechatronics International Conference, 2010)
We investigate the application of kernel density
estimators to pattern-recognition problems. These estimators
have a number of attractive properties for data analysis in
pattern recognition, but the particular characteristics ...
Efficient data selection for ASR
(Language Resources and Evaluation, 2015)
Automatic speech recognition (ASR) technology has matured over the past few decades and has made significant impacts in a variety of fields, from assistive technologies to commercial products. However, ASR system development ...
Predicting utterance pitch targets in Yoruba for tone realisation in speech synthesis
(Elsevier, 2014)
Pitch is a fundamental acoustic feature of speech and as such needs to be determined during the process of speech synthesis. While a range of communicative functions are attributed to pitch variation in speech of all ...
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 ...
Performance analysis of a multilingual directory enquiries application
(Pattern Recognition Association of South Africa and Mechatronics International Conference, 2014)
In a multilingual society such as South Africa, a
practical directory enquiries (DE) application should be able to
serve users from various language backgrounds with information
relating to names in various languages: ...