Patent ID: 8161507

Claim:
A channel-switching apparatus of a broadcast receiving system in a digital broadcasting system, comprising: a tuner to tune physical channels to discriminate each of the physical channels; a conditional access unit to execute conditional access control on the tuned physical channels by using conditional access information carried by the tuned physical channels, with the conditional access information enabling the conditional access control to be executed on a physical channel basis; a demultiplexer to demultiplex the physical channels which are processed by the conditional access control to discriminate logical channels in the physical channels; and a controller to control the tuner, the conditional access unit, the demultiplexer, and a demodulator, to receive a logical channel in response to a channel-switching request, and to output the received logical channel in a single physical channel, wherein the conditional access unit is configured to receive the conditional access information in physical channel units corresponding to the tuned physical channels, and to execute conditional access control of the tuned physical channels based upon the received conditional access information, wherein, in response to the channel-switching request, the controller determines if the channel-switching request is a request to switch logical channels in the single physical channel, and wherein if the channel-switching request is a request to switch logical channels in the single physical channel, the controller controls the tuner to tune to a logical channel corresponding to the channel-switching request without carrying out conditional access processing.