Internet communication based on SIP is ideally suited to provide impaired
users all the rich multimedia communications available to everyone else on
the Internet. Hearing- and speech-Impaired people can use either endpoint-
based applications or network-based transcoding services.
References
[1] “User Requirements for SIP in Support of Deaf, Hard of Hearing and
Speech-impaired individuals” by N. Charlton. RFC 3351, IETF, August
2002.
[2] “Human Factors; Duplex Universal Speech and Text Communication”
Draft ETSI Guide EG 202 320, 2005-02.
[3] “Application Profile-Sign Language and lip-reading real-time conversa-
tions using low bit rate video communications,” ITU-T Series H, Supple-
ment 1. Geneva, 05/99. Freely available online at http://www.itu.int/home/
index.html.
[4] “SIP Telephony Device Requirements” by H. Sinnreich et al. Internet Draft,
IETF, October 2005.
[5] “RTP Payload for Text Conversation” by G. Hellstrom et al. Internet Draft
RFC2793bis to update RFC 2793, IETF, January 2005.
[6] The home page for the Swedish Synface project is http://www.speech.kth.se/
synface/index.htm.
[7] “Transcoding Services Invocation in SIP Using Third Party Call Control
(3pcc)” by G. Camarillo et al. RFC 4117, IETF, June 2005.
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