Patent ID: 7466903
Filing Date: 2008-12-16
Classification: G09G,G11B,H04N

Abstract:
1. A reproduction apparatus for reproducing a digital stream generated by multiplexing a video stream and a graphics stream, 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, wherein: the graphics stream represents the interactive display to be overlaid on the motion picture and includes, in a sequential arrangement, state control information stored in a packet, a first set of graphics data, and a second set of graphics data; the interactive display includes a plurality of graphical button materials; the state control information includes specification information specifying a button material to be presented in a selected state as default in an initial display of the interactive display; the first set of graphics data includes graphics data that is used for rendering a normal state of all button materials included in the interactive display and a selected state of the button material specified by the specification information; the second set of graphics data includes graphics data that is used for rendering a selected state of a button material other than the button material specified by the specification information and an active state of all button materials; the packet includes a time stamp that indicates a time obtained by adding a predetermined duration to a decode ending time of a last piece of the first set of graphics data in the graphics stream; and said reproduction apparatus is operable to present, when a reproduction time of the video stream reaches the time indicated by the time stamp, the initial interactive display using the first set of graphics data.