Method of processing application in digital broadcast receiver connected with interactive network and the digital broadcast receiver

A digital broadcast receiver comprising:

• a first receiver to receive, from a broadcast network, broadcast audio/video (A/V) content and application information table (AIT) data;
• a parser to parse a linkage descriptor, wherein the linkage descriptor comprises a field identifying a type of at least one secondary device able to process the application;
• a display to display an indicator informing that there is at least one application usable in at least one of a plurality of secondary devices while displaying video data included in the broadcast A/V content, wherein the indicator is overlaid with the video data;
• a search processor to search a specific secondary device coupled to the digital broadcast receiver, wherein identification for the specific secondary device is registered in a memory of the digital broadcast receiver;
• a controller to extract additional information on multiple applications and to control the display to display an application list according to the extracted additional information, wherein the application list comprises at least one of time information for downloading the applications or price information;
• a second receiver to receive a request signal for a specific application in the application list from the specific secondary device;
• and
• a transmitter to transmit the requested application or an IP address of the requested application to the specific secondary device.