Patent ID: 8423798

Claim:
A portable electronic apparatus configured to be battery powered and to display a visual program received from the outside, comprising: a receiver configured to receive Electronic Program Guide (EPG) data related to the program from the outside; a battery power estimator configured to detect a battery output and to estimate remaining battery power on the basis of the detected battery output; an image processor configured to process an image included in the program by using a plurality of functions of image quality control; a controller configured to set how to use each of the functions by means of the image processor, the controller being configured to estimate battery lasting time on the basis of the remaining battery power, a setting of the use of the functions and the EPG data, the controller being configured to update the setting of the use of the functions upon judging the remaining battery power to be short of enough to display the program to the end; and a communication section configured to receive control information from the outside, the control information defining an order of the functions in the setting of the use of the functions, wherein the controller is further configured to update the setting of the use of the functions in the order defined by the control information upon judging the remaining battery power to be short of enough to display the program to the end.