The digital broadcasting transmitter and a control method

There is disclosed herein a digital broadcast receiver and its control method. The control method for a digital broadcast receiver according to an embodiment of the present invention, comprising the steps of: receiving a mobile service data and the main service data is multiplexed broadcast signal, and the received mobile service transmitted from the data within the data group parameter channel signaling information extracting a high-speed information channel signaling information, using the extracted FIC signaling information, obtain a first program table describing the virtual channel information and services in the virtual channel group of the ensemble of the received mobile service data phase and, using the first program table the obtained, detecting a descriptor that defines the basic information required to access the service, and using the detected descriptor allows access to the service that and a control step of so. Digital broadcast, descriptor