There is provided a cable broadcast receiver for solving problems arising in the switching between execution of a download application and reproduction of video audio information from an external device. The receiver has operating modes including a first mode and a second mode. Under the first mode, the receiver is operated based on a download application acquired through a network. Under the second mode, the receiver is operated based on a receiver application. The receiver is operated under the second mode when information inputted from an external device is to be displayed. A key delivery unit delivers, upon receiving a key code instructing a channel change during the operation under the second mode, the key code indicating the channel change to a download application management unit which controls the key delivery to the download application, and a receiver application management unit which controls the key delivery to the receiver application.