SATNAC 2009 Conference Papers
Network Services
Title: HLTs in Second Language Learning – Can we
Optimise TTS Technology to be a Better Teaching Tool?
Authors: Lehlohonolo Mohasi (
Abstract: This paper investigates the possibility of
optimising text-to-speech (TTS) technology for a more efficient use in second
language learning. We believe that a high quality TTS system first has to be
developed before this technology can be optimally used in second language
learning. In reviewing the different techniques and methods by different
researchers in TTS technology with the aim of advancing TTS speech output, we
also try our hand by directing our focus on improving prosody of a TTS system.
Since language learning is best done through interaction, we propose an
interactive TTS system through dialogue. Our attempt therefore, at improving
prosody, will be done in relation to a dialogue system. Another proposal is the
integration of linguistic distance measure with TTS. We believe this will be
more applicable to the source and target languages of interest being studied.
We finally discuss the different methods used for evaluating TTS systems in
general, and evaluation of TTS performance in language learning. We show that
people use different methods and metrics depending on what aspect or criterion
they want to measure. An overall agreement has not been reached as yet to the
technique or metric which gives a true assistive measure of the technology. We
conclude with a remark that an interactive TTS system with prosody enhanced is
one good step towards an optimal teaching tool.
Title: Developing a Videomail Service for iLanga, an Asterisk
Based IP PBX
Authors: Zelalem Shibeshi (
Abstract The requirement for receiving a
message when a person is unable to answer his/her phone has existed since the
introduction of telecom services. This has led to the development of voicemail
systems. With the advent of VoIP, video communication, which was once
thought to be a great challenge, has also become a reality. However, not all
VoIP systems provide videomail service. The current stable version of Asterisk,
an open-source IP PBX, does not natively include video recording and playback
functionality (the main functions of a videomail service). As a result, an
application was developed that can record and playback video messages in mp4
format. We extended this application to provide a full fledged videomail
service for Asterisk. This paper discusses this extension and its integration
in iLanga, the Asterisk-based IP PBX which is in use by Computer Science postgraduate
students.
Title: A Direct Marketing
Platform for IMS-Based IPTV
Authors: Phillippa Wilson (University
of Cape Town), Neco Ventura (University of Cape Town)
Abstract: The widespread
adoption of the IP Multimedia Subsystem (IMS) by operators faced many
challenges. Currently, telcos all over the world are rolling out next
generation networks (NGN). Moreover, a number of operators already have an IMS
infrastructure in place. Deploying an IMS architecture requires heavy
investments. Thus, telcos need means to recoup the investment costs within
particular timeframes. Direct marketing
is a technique that enables product sellers to reach a specific target consumer
group. This results in a higher turnover. The IMS provides a platform for
personalised applications like IPTV. In this paper we explore the design of an
IMS-based intelligent advertising system for direct marketing. The system
utilises IPTV communications. We also explore implementation requirements for
an advertisement application server. The implementation would be based on the
UCT Advanced IPTV server, to be deployed in the UCT IMS testbed.