Digital broadcasting transmission/reception system capable of improving receiving and equalizing performance and signal processing method thereof

And the reception performance, and the digital broadcasting transmitting and receiving system and a method of signal processing to improve the equalization performance is disclosed. The digital broadcasting transmitter according to the present invention, stuff bytes at a predetermined position (stuff byte) is to replace the stuff bytes in a predetermined sequence in the receiving the inserted data randomizing randomizing section, randomization of data stuff byte replacing part , the stuff byte is a modulation encoder and the encoded data for encoding the data replaced with the predetermined sequence includes a transmitter configured to transmit. Therefore, it is possible to improve the performance of the equalizer by operating the sequence of the known data in a pattern that can improve the operation performance of the equalizer and improve the reception performance of the receiver.