Now showing items 1-16 of 16

  • Adapting x264 to asynchronous video telephony for the Deaf 

    Ma, Zhen Yu; Tucker, William David (Telkom, 2008)
    Deaf people want to communicate remotely with sign language. Sign language requires sufficient video quality to be intelligible. Internet-based real-time video tools do not provide that quality. Our approach is to use ...
  • Asynchronous video telephony for the Deaf 

    Ma, Zhen Yu; Tucker, William David (Telkom, 2007)
    The South African Deaf community has very limited telephony options. They prefer to communicate in sign language, a visual medium. Realtime video over Internet Protocol is a promising option, but in reality, the quality ...
  • Automatic voice relay with open source Kiara 

    Yi, Long; Tucker, William David (Telkom, 2009)
    One way for Deaf people to communicate with hearing people over the telephone is to use a voice relay. The service is often provided with a human relay operator that relays text into voice, and vice versa, on behalf of the ...
  • Browser-based video communication for deaf people 

    Wang, Yuan Yuan; Tucker, William David (Telkom, 2009)
    This paper describes work in progress to to provide browser-based sign language communication for deaf users. The paper introduces the communication requirements for a disadvantaged Deaf community in Cape Town, describes ...
  • Deaf telephony: community-based co-design 

    Blake, Edwin H.; Tucker, William David; Glaser, Meryl; Freudenthal, Adinda (Wiley, 2011)
    The process of community-based co-design is one that explores various solution configurations in a multi-dimensional design space whose axes are the different dimensions of requirements and the various dimensions of designer ...
  • Deaf telephony: community-based co-design (case study) 

    Blake, Edwin H.; Tucker, William David; Glaser, Meryl; Freudenthal, Adinda (Wiley, 2011)
    The process of community-based co-design is one that explores various solution configurations in a multi-dimensional design space whose axes are the different dimensions of requirements and the various dimensions of designer ...
  • Guaranteed delivery of semi-synchronous IP-based communication 

    Julius, Elroy P.; Tucker, William David (Telkom, 2005)
    This paper presents an empirical solution for guaranteeing the delivery of synchronous and asynchronous messages within a semi-synchronous IPbased communication domain. The communication infrastructure that is needed between ...
  • Guaranteed delivery of semi-synchronous IP-based communication 

    Julius, Elroy P.; Tucker, William David (Telkom, 2004)
    This research aims to find an empirical solution for guaranteeing the delivery of synchronous and asynchronous messages within a semi-synchronous IP-based communication domain. The communication infrastructure that is ...
  • Kiara: an open source SIP system to support Deaf telephony 

    Yi, Long; Tucker, William David (Telkom, 2008)
    This paper describes Kiara, an open source SIPbased communication system that provides the building blocks to enable Deaf relay services. We have implemented a prototype that provides real-time text, voice and video to a ...
  • A mobile Deaf-to-hearing communication aid for medical diagnosis 

    Mutemwa, Muyowa; Tucker, William David (Telkom, 2010)
    This paper describes how a deaf to hearing communication aid built for a mobile phone can be used to provide semi-synchronous communication between a Deaf person and a hearing person who cannot sign. Deaf people with access ...
  • Preparation of Deaf end-users and the softbridge for semi-automated relay trials 

    Glaser, Meryl; Tucker, William David; Mashao, Daniel (Telkom, 2004)
    Following on the development of several prototypes, we have built a semi-automated Deaf Telephony prototype on the SoftBridge platform. This prototype relays text and speech between Deaf users on the Internet and hearing ...
  • SoftBridge in action: the first Deaf telephony pilot 

    Tucker, William David; Glaser, Meryl; Lewis, John (Telkom, 2003)
    Following on several partial prototypes, we built an automated Deaf Telephony bridging application with the SoftBridge platform. The SoftBridge performs multi-modal bridging in real-time using Text-to-Speech (TTS) and ...
  • SoftBridge: an architecture for building IP-based bridges over the digital divide 

    Lewis, John; Tucker, William David; Blake, Edwin H. (Telkom, 2002)
    Users and computing equipment have varying capabilities that include the abilities to exchange text and audio, engage in high bandwidth communication, etc. As the technological options increase, e ective communication ...
  • Telecommunications bridging between deaf and hearing users in South Africa 

    Glaser, Meryl; Tucker, William David (2004)
    This paper presents a description of telecommunications for Deaf people in South Africa by contrasting the situation in the developed world. We explain the main motivations for providing a locally appropriate solution. ...
  • Telgo323: an H.323 Bridge for deaf telephony 

    Penton, Jason; Tucker, William David; Glaser, Meryl (Telkom, 2002)
    We have developed a prototype bridge that relays text and speech between Teldem, a text telephone for the Deaf, and a standard telephone or H.323 endpoint. Telgo323 uses modified H.323 media gateways and open source Text ...
  • Web-based telephony bridges for the deaf 

    Glaser, Meryl; Tucker, William David (Telkom, 2001)
    A Teldem provides text-based telephony services to the deaf. Despite an array of text-based communications mechanisms on the web, the Teldem is the only means of synchronous telecommunication available to a deaf person. ...