Patent ID: 8023797

Claim:
A non-transitory information record medium on which there are recorded: a series of content information which is constructed from at least one elementary stream and which is stored as a plurality of packets, each of the plurality of packets stores a fragment of the elementary stream; play list information for defining reproduction sequence of the content information by a unit of item, wherein the item constitutes the content information and is accessible upon reproducing; and object information for indicating a relationship between packets and the elementary stream of the content information, the play list information including: item information for specifying each item which constitutes the content information by indicating both of a reproduction start time and a reproduction end time of the item and for specifying one portion of the object information for the content information, the object information further including an address of the content information which is specified by the item information, each of the content information, the play list information and the object information being recorded into a different area, respectively, wherein there are recorded on the non-transitory information record medium: menu information, (i) which is constructed from at least one elementary stream, (ii) which is stored in the plurality of packets, each of the plurality of packets stores a fragment of the elementary stream, for displaying at least one menu-button, (iii) which includes information for indicating a coordinate of the menu-button which is displayed on a display-screen, (iv) which includes command information for indicating a command to be executed if the menu-button is executed, (v) which is recorded into same area as the content information is recorded, and (vi) which is superimposed on a display of the content information during a reproduction of the content information, the play list information further includes: slave item information for specifying other portion of the object information for the menu information as a slave item, the item information further includes information which indicates an identification information of the slave item information, and the object information further indicates a relationship between packets and the elementary stream of the menu information, and further includes an address of the menu information which is specified by the slave item information, the content information and the menu information is recorded such that the reproduction of the content information which is reproduced before the display of the menu information is kept, by controlling the content information and the menu information independently and separately, during the menu information is superimposed on the display of the content information.