Client_ID: The Client_ID is a 32-bit identifier. It shall identify uniquely an EMMG/PDG across all the EMMGs/PDGs connected to a given MUX. To facilitate uniqueness of this value, the following rules apply: * In the case of EMMs or other CA related data, the two first bytes of the client_id should be equal to the two bytes of the corresponding CA_system_ID. * In other cases a value allocated by DVB for this purpose should be used.