Patent ID: 7599602

Claim:
A method recording data with a recording apparatus, the method comprising: grouping data, via the recording apparatus, into a plurality of object units, and grouping, via the recording apparatus, one or more object units into an object; and creating and recording management information, via the recording apparatus, including map information for accessing the data, wherein the map information includes an object unit index table associated with the object units, and the object unit index table includes object unit size information associated with each of the object units, wherein the object unit size information indicates a time range of each object unit in the object, the time range being variably set among the objects, wherein a time value of the time range indicates a size of each object unit in the object, and wherein a time value of a time range of each object unit included in a first object is a first time value, and a value of a time range of each object unit included in a second object is a second time value that is different than the first time value.