A method of processing a multi-mode service, MMS, broadcast signal in a digital television receiver, the method comprising: receiving a transport stream including a plurality of programs and side information for the plurality of programs via a selected channel; extracting the side information from the received transport stream; decoding the plurality of programs and the extracted side information; determining, based on the decoded side information, whether the selected channel is an MMS broadcast channel, the MMS broadcast channel including a single physical channel accompanied by a plurality of logical channels configured with the single physical channel, each of the plurality of logical channels transmitting a broadcast program; receiving a manual channel shift key signal for switching to a new channel from a remote controller; characterized by: displaying, in response to the manual channel shift key signal, an onscreen display screen enabling a user selection of one of a logical channel skip function, a logical channel lock function, and neither function, wherein, when performing the manual channel selection operation, the logical channel skip function determines a selection of the next channel by skipping all logical channels and the logical channel lock function determines a selection of the next channel by shifting through each logical channel belonging to the physical channel of the currently selected channel; and displaying channel information on the switched new channel based on the decoded side information and an image of the switched new channel on a whole screen. receiving a transport stream including a plurality of programs and side information for the plurality of programs via a selected channel; extracting the side information from the received transport stream; decoding the plurality of programs and the extracted side information; determining, based on the decoded side information, whether the selected channel is an MMS broadcast channel, the MMS broadcast channel including a single physical channel accompanied by a plurality of logical channels configured with the single physical channel, each of the plurality of logical channels transmitting a broadcast program; receiving a manual channel shift key signal for switching to a new channel from a remote controller; characterized by: displaying, in response to the manual channel shift key signal, an onscreen display screen enabling a user selection of one of a logical channel skip function, a logical channel lock function, and neither function, wherein, when performing the manual channel selection operation, the logical channel skip function determines a selection of the next channel by skipping all logical channels and the logical channel lock function determines a selection of the next channel by shifting through each logical channel belonging to the physical channel of the currently selected channel; and displaying channel information on the switched new channel based on the decoded side information and an image of the switched new channel on a whole screen. displaying, in response to the manual channel shift key signal, an onscreen display screen enabling a user selection of one of a logical channel skip function, a logical channel lock function, and neither function, wherein, when performing the manual channel selection operation, the logical channel skip function determines a selection of the next channel by skipping all logical channels and the logical channel lock function determines a selection of the next channel by shifting through each logical channel belonging to the physical channel of the currently selected channel; and displaying channel information on the switched new channel based on the decoded side information and an image of the switched new channel on a whole screen.