Display controlling method, time controlling method, time managing method, and broadcast receiving apparatus

A broadcast receiving apparatus comprising:

• a receiver configured to receive a 4K broadcasting service and a 2K broadcasting service and demodulate the 4K broadcasting service and the 2K broadcasting service;
• a display;
• a remote control receiver configured to receive a signal from a remote controller;
• a controller,
• a non-volatile memory configured to store operating software;
• and
• a random access memory configured to be used for the operating software,
• wherein the receiver is configured to receive the 4K broadcasting service transmitted by a first transmission method and demodulate the 4K broadcasting service, and the controller is configured to control the display to display a broadcasting program of the 4K broadcasting service,
• wherein the receiver is configured to receive the 2K broadcasting service transmitted by a second transmission method and demodulate the 2K broadcasting service, and the controller is configured to control the display to display a broadcasting program of the 2K broadcasting service,
• wherein the controller is configured to control clock synchronization processing for the 4K broadcasting service and clock synchronization processing for the 2K broadcasting service, and
• wherein the controller is configured to control:
• the clock synchronization processing for the 2K broadcasting service to continue even when the broadcasting program of the 4K broadcasting service is displayed on the display;
• and
• the clock synchronization processing for the 4K broadcasting service to continue even when a broadcasting program of the 2K broadcasting service is displayed on the display.