Patent ID: 7606474

Claim:
An information record medium onto which a whole stream including a plurality of partial streams each composed of content information including a plurality of video information whose reproduction can be changed is recorded by a packet unit, said information record medium including: an object data file for storing object data composed of a plurality of packets each storing pieces of the content information; and an object information file for storing, as reproduction control information to control a reproduction of the object data file, relationship definition information to define a relationship between a plurality of packets and the plurality of partial streams, wherein the object data is stored in said object data file and is interleaved in at least a part of a reproduction range by an interleaved unit composed of a plurality of packets, and the object information file collectively stores the reproduction control information which is not multiplexed by the packet unit and further stores, as the reproduction control information, address information to indicate a number, a reproduction time and changeable-position of the plurality of the packets which constitute the interleaved unit.