Abstract: A portable terminal providing TV broadcast reception functionality, that achieves reduced power consumption. A CPU controls lighting of a back light via a back light control part. The CPU controls a CM identifier detection part to detect a commercial identifier from the demodulated signal of the TS of a broadcast wave received in real time by a portable terminal or from the demodulated signal of the TS from a replay data holding part. The result of this detection operation is stored in a memory part. A decision is made as to whether the start time of commercials has arrived from the detected result as read compared to the current time. If the time to start commercials has arrived a back light stops lighting and this discontinuance of lighting continues until the end time of the commercials. When the end time of the commercials is reached the back light lights again.

Abstract: A portable terminal includes a tuner to receive broadcast signals; a receiver to receive data communication signals from a remote server; a display to show images represented by image data from the broadcast signals or the data communication signals; a detector coupled to the tuner to detect a signal intensity of the broadcast signals; and a data processor to process the image data from the broadcast signals or the data communication signals and the send the processed image data to the display to be displayed, wherein the data processor receives and processes the image data from the broadcast signals if it is determined that the signal intensity of the broadcast signals is greater than a reference value, and receives and processes the image data from the data communication signals if it is determined that the signal intensity of the broadcast signals is less than the reference value.