The additional data transmission is digital transmission system and method

The digital transmission system is disclosed. The system, to transmit a low power signal for representing the transmission signal generating unit and the additional data to put the data on carrier waves generate a transmitted signal and a data processing unit for adding an additional load to the carrier. The system can be implemented as OFDM systems or as DVB-T, both single-carrier system, such as VSB. Accordingly, the state without degrading the data transmission quality, it is possible to efficiently transmit the additional data. Additional data, a low-power signal, DVB-T, VSB