Patent ID: 8350870

Claim:
A playback method comprising: presenting first graphics data including second graphics data and third graphics data on a graphics plane at a first time, the second graphics data being different from the third graphics data; overlaying the first graphics data presented on the graphics plane onto first video data presented on a video plane; presenting fourth graphics data including the second graphics data and fifth graphics data on the graphics plane at a second time which is after the first time, the second graphics data being different from the fifth graphics data; and overlaying the fourth graphics data presented on the graphics plane onto second video data presented on the video plane, wherein a window is defined on the graphics plane, and the third graphics data presented in the window is different from the fifth graphics data presented in the window, wherein the second graphics data is presented outside of the window, and wherein, when the fourth graphics data is presented on the graphics plane, the second graphics data presented outside of the window is not redrawn.