A client receiving a data stream via broadcasting is provided. The client includes a receiver which receives an object carousal that comprises data and a broadcast inter ORB protocol (BIOP) message, a processor which retrieves a transmission code set information from the BIOP message, wherein the transmission code set information provides an instruction to interpret character strings of the BIOP message, and a decoder which decodes the character strings based on the instruction provided by the transmission code set information.