?? ?? ?? ?? ? ?? ?? ??? ??? ??? ??/?? ?? ????? ????? ????.??? ?? ? ?? ??? ???/???? ?? ??? ??/?? ???/??? ???? ???/???? ??????? ?? ???? ???? ?? ? ??RFC 3550 RTP July 2003 The textual content is encoded based on the UTF-8 encoding specified in RFC 2279 [5]. US-ASCII is usually a subset of the encoding and necessitates no more encoding. The presence of