Patent ID: 7970255

Claim:
An information record medium on which there are recorded in a non-transitory state: an object data file for storing a object data which includes a video stream having a main-video and a sub-picture stream having a sub-picture; a play list information file for storing play list information which includes a plurality of item information each of which indicates a reproduction unit of the object data; and an object information file for storing object information which indicates an address of the object data which is indicated by each of the plurality item information, wherein the sub-picture stream includes sub-picture information, which indicates the sub-picture displayable at least partially over the main-video, and sub-picture control information, the sub-picture control information includes (i) sub-frame control information to control displaying sub-frame which forms one portion of the sub-picture, (ii) identification information to indicate the sub-picture information which is a control target by the sub-frame control information, (iii) sub-frame display position information to indicate a display position of the sub-frame, (iv) cut out range information to indicate a range of the sub-picture which forms the sub-frame by cutting-out one portion of the sub-picture, (v) button number information to indicate the number of button which is formed by the sub-frame, (vi) button display state information to indicate an initial button display state of the button, and (vii) command information to indicate a command which is to be performed in accordance with the button, wherein the sub-frame control information includes dynamic control information to dynamically change a display aspect of the sub-frame.