Patent ID: 7426337

Claim:
A reproduction apparatus for reproducing a digital stream into which a video stream and a graphics stream are multiplexed, said reproduction apparatus comprising: a video decoder operable to decode the video stream into a motion picture made of a plurality of pictures; and a graphics decoder operable to decode the graphics stream to obtain an interactive display that is to be 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 respectively correspond to different states of the button material among a normal state, a selected state, and an active state and are disposed in a sequential order; and the graphics stream further includes state control information used to control the states of the button materials, the state control information including specification information used to indicate that a state of a button material in the plurality of button materials is specified to the selected state, the button material corresponds to a value contained in a register included in the reproduction apparatus.