Recording medium, reproduction apparatus, recording method, integrated circuit, program, and reproduction method

摘要

A recording medium, a reproduction apparatus, a recording method, a reproduction method and a program to operate a graphics stream including: control information stored in packets, the graphics stream includes control information stored in packets, and a plurality of graphics data groups, the graphics data groups being for generating an interactive screen that includes button materials, and being combined with a moving picture obtained by decoding the video stream, the button materials are GUI components that visually represent a plurality of entities that a user can select, each of the button materials is in one of a normal state, a selected state, and an active state, each of the graphics data groups is one of (i) a first graphics data group composed of graphics data that expresses the normal state of one of the button materials, (ii) a second graphics data group composed of graphics data that expresses the selected state of one of the button materials, and (iii) a third graphics data group that expresses the active state of one of the button materials, the first graphics data group, the second graphics data group and the third graphics data group being arranged sequentially in the stated order, a packet that stores a last piece of graphics data that constitutes an initial display of the interactive screen has a time stamp that shows a time at which decoding is completed of all data that constitutes the initial display of the interactive screen, each packet that stores the control information has a time stamp that shows a display timing, the display timing being obtained by adding a predetermined period to a decoding end time shown by the time stamp of the packet that stores the last piece of graphics data, the control information includes type information that indicates a memory management start, the time stamp of the control packet is a presentation time stamp, and the control packet further includes a decode time stamp whose value indicates a point of a reproduction timeline of the digital stream, which corresponds to the memory management start, and a time at which the control information is read to a memory.