Patent ID: 8208493

Claim:
An apparatus for transmitting broadcast data in a digital broadcasting service system, the apparatus comprising: a server terminal for creating a digital broadcast service information web page by receiving digital broadcast information about a digital broadcast service, the digital broadcast information being provided from a digital broadcast service provider, providing the digital broadcast service information web page, receiving a digital broadcast transport stream from the digital broadcast service provider, removing a header used for the digital broadcast reception from the received broadcast stream, and transmitting a stream of broadcast data, from which the header has been removed; and at least one client terminal for accessing the server terminal through an Internet Protocol (IP) network, requesting and receiving the digital broadcast service information web page, requesting a digital broadcast that is selected by the user from the digital broadcast service information web page, and receiving and outputting the stream of broadcast data, from which the header has been removed, corresponding to the digital broadcast selected by the user, wherein the server terminal is a mobile terminal, wherein the at least one client terminal requests a broadcast channel change from the server terminal, when a user requests the broadcast channel change while the broadcast data is being output, wherein when a channel change by the server terminal is possible, the server terminal changes the current reception RF frequency to a new reception RF frequency requested by the at least one client terminal, when the at least one client terminal requests the broadcast channel change, receives a new broadcast stream corresponding to the requested channel, removes a header used for the digital broadcast reception from the new broadcast stream, and provides the new broadcast stream to the at least one client terminal, and the at least one client terminal receives the new broadcast stream from the server terminal and outputs the new broadcast stream, and wherein when the channel change by the server terminal is not possible, the server terminal sends a service unavailability message to the client terminal, and the at least one client terminal receives and outputs the service unavailability message.