Object When two image streams to be synchronized and reproduced are separately transmitted by broadcasting and by the Internet, to successfully synchronize and reproduce the two image streams. Data to be transmitted by a packet transmitter are encoded for privacy and to restrict intelligent receipt of the data to the intended recipient. The sealing plate has a metal core, press fit into the outer member, and a sealing member, integrally vulcanized adhered to the metal core. To this end, the composite rope has parallel individual tension members surrounded by an elastomer material which are interconnected by an elastomer connecting layer on one side, and the tension members engage in corresponding grooves of the traction sheave. Further described are rubber compounds containing the blocked-mercapto alkoxy-modified silsesquioxanes.