Patent ID: 8144174

Claim:
A display processing apparatus, comprising: a graphics data storage unit configured to store graphics data specified by an application; a video decoder which decodes video data received through a broadcast signal; a video data storage unit configured to store video data decoded by said video decoder; a composition unit configured to compose the graphics data stored in said graphics data storage unit and the video data stored in said video data storage unit; a video resolution management unit configured to accept, from the application, a video resolution change request for changing a resolution of the video data stored in said video data storage unit; a resolution selection determination unit configured to determine and change a resolution of the graphics data, when the resolution of the video data stored in said video data storage unit is changed or when a video format of the video data decoded by said video decoder is changed; and a resolution combination storage unit which stores a list indicating combinations of permitted graphics data resolutions and video data resolutions, wherein said resolution selection determination unit includes: a processing unit configured to change the resolution of the video data stored in said video data storage unit to the resolution accepted by said video resolution management unit; a processing unit configured to determine the resolution of the graphics data stored in said graphics data storage unit, according to a current video format of the video data decoded by said video decoder; and a processing unit configured to change the resolution of the graphics data stored in said graphics data storage unit to the determined resolution, and said resolution selection determination unit is configured to change, with reference to said list, the resolution of the graphics data to a resolution of graphics data corresponding to the changed resolution of the video data, when the resolution of the graphics data corresponding to the changed resolution of the video data is indicated in said list.