Patent ID: 7962012

Claim:
A method for reproducing a digital stream into which a video stream and a graphics stream are multiplexed, said method comprising: decoding the video stream into a motion picture made of a plurality of pictures; and displaying an interactive display overlaid with the motion picture, the interactive display including a plurality of graphical button materials; wherein: the graphics stream includes a plurality of pieces of graphics data that are grouped under state sets; the state sets include a normal-state set representing a normal state of the respective button materials, a selected-state set representing a selected state of the respective button materials, and an active-state set representing an active state of the respective button materials, the respective state sets being disposed in the stated order; the graphics data includes a plurality of frames that provide an animated button display for a predetermined time period where a user enables at least one of the state sets by selecting that state set; and in said displaying, graphics data belonging to the normal-state set and the selected-state set is used for presenting an initial display of the interactive display; and remaining graphics data is used for updating the interactive display upon a user operation.