This document specifies an RTP payload format for the transmission of 3GPP (3rd Generation Partnership Project) timed text. 3GPP timed text is a time-lined@ decorated text media format with defined storage in a 3GP file. Timed Text can be synchronized with audio/video contents and used in applications such as captioning@ titling@ and multimedia presentations. In the following sections@ the problems of streaming timed text are addressed@ and a payload format for streaming 3GPP timed text over RTP is specified.