Abstract: A handheld information device, including: a display part to display one or more control menus; and a controller to calculate a velocity of a vehicle, and to control the display part to display an enlarged control menu relatively increased in size than a predetermined control menu on the display part if the calculated velocity is faster than a predetermined reference velocity.

Abstract: A handheld information device, including: a display part to display one or more control menus; and a controller to calculate a velocity of a vehicle, and to control the display part to display an enlarged control menu relatively increased in size than a predetermined control menu on the display part if the calculated velocity is faster than a predetermined reference velocity.

Abstract: An apparatus for providing a supplementary function of digital multimedia broadcasting includes a control unit that receives a selected instruction message for a digital multimedia broadcasting signal input by a user, a demodulating unit that receives a digital multimedia broadcasting signal corresponding to the selected instruction message by using at least one tuner, a reception sensitivity confirming unit that confirms the reception sensitivity of the received digital multimedia broadcasting signal, and a determining unit that determines whether the received digital multimedia broadcasting signal is output in accordance with the confirmed reception sensitivity.

Abstract: A digital multimedia broadcasting (DMB) receiver and a channel display method using the same, and more particularly, a digital multimedia broadcasting (DMB) receiver that allows a user to easily identify channels of a broadcast signal including a plurality of programs for a carrier frequency, and a channel display method using the DMB receiver. The digital multimedia broadcasting (DMB) receiver includes a tuner that receives a broadcast signal including a plurality of programs for a predetermined carrier frequency, a demodulating unit that demodulates the received broadcast signal to obtain channel information and program information, and a control unit that displays programs for a carrier frequency in a hierarchical format using a predetermined interface.