Patent ID: 7660511
Filing Date: 2010-02-09
Classification: G11B,H04N

Abstract:
1. A recording medium comprising a digital stream and playlist information, the playlist information including at least one piece of playback section information and playlist mark information, each piece of the playback section information including a pair of an in-time and an out-time and defining therewith a playback section on a playback timeline of the digital stream, the playlist mark information including an identifier of at least one playback section, time information and attribute information, the time information indicating, as a cue-up position, a time point between the in-time and the out-time of each playback section, the digital stream including a video stream and a graphics stream, the graphics stream including at least one interactive control segment, and an object definition segment defining the graphics object, the interactive control segment including at least one piece of button information, each piece of the button information realizing an interactive screen by displaying a graphics object as a button material in a given state and including a button command to be executed by a playback device when a confirmation operation is made on the button material, the button command being a link command for instructing the playback device to change a playback start position, the link command being in an indirect reference format and indicating a playback start position by indicating a piece of playlist mark information, the attribute information showing whether a cue-up position indicated by a piece of playlist mark information is a link point designated with a link command or an entry mark, and when a user inputs an operation intended to select a playback position, the playback device referring to a cue-up position that is an entry mark but ignoring a cue-up position that is a link point.