Patent ID: 8572645

Claim:
A method of controlling data for an emergency alert system (EAS) in a digital broadcast receiver, the method comprising: downloading and installing an EAS widget application without regard for a system of the digital broadcast receiver, wherein the EAS widget application calls EAS extension Application Programming Interface (API), wherein the EAS extension API includes a first API used to limit partial functionality of the IPTV during execution of the EAS widget application, a second API used to determine a region in which the IPTV is located using an IP address of the IPTV, and a third API used to allow the EAS widget application to be displayed in a layer above other widget applications, and; receiving a digital broadcast signal including an emergency alert table including a uniform resource identifier (URI) descriptor; detecting a URI address included in the URI descriptor; accessing the URI address; receiving additional emergency alert information from the URI address; and controlling to display the additional emergency alert information on a screen of the digital broadcast receiver.