Method of controlling synchronization of digital broadcast and additional information and digital broadcast terminal for embodying the same

A method for controlling synchronization of digital broadcasting and supplementary information and a digital broadcasting terminal for implementing the same are provided to enable a receiving terminal to control the synchronization of the digital broadcasting and the supplementary information irrespective of changes of channel characteristics of a broadcasting network, kinds of terminals, and types of user interfaces. In a method for controlling synchronization of digital broadcasting and supplementary information related to the digital broadcasting, the method comprises the following steps of: outputting the digital broadcasting and the supplementary information(S22); receiving a signal, for changing an output speed of the supplementary information, from a user(S23); and changing the output speed of the supplementary information according to the received signal(S24).