Text is interleaved and transported along with media data over the same real-time Internet Protocol (IP) media transport session. A network processing device identifies text characters corresponding with text signaling. The identified text characters are formatted into text packets and sent over the...http://www.google.de/patents/US7656861?utm_source=gb-gplus-sharePatent US7656861 - Method and apparatus for interleaving text and media in a real-time transport session
