Timed text is text that is rendered at the terminal, in synchronization with other timed media such as video or audio. Timed text is used for such applications as closed captioning, titling, and other visual annotation of timed media. This TS defines the timed text format relative to the 3GPP file format. This TS defines the format of timed text in downloaded files.
full Table of Contents for TS 26.245 Word version: 15.0.0