Storage medium, apparatus for creating recordation data therefor and apparatus for restoring recorded data

摘要

A storage medium (computer readable medium) for recording information data in a protective manner such that an easy data processing can hardly succeed correct reproduction of information such as music information. A machine for creating data to be recorded in the storage medium and a machine for restoring the recorded data. Incomplete information data which is obtained by omitting some data in complete information data adapted to provided complete information is recorded in the storage medium. The data creation machine separates the complete information data into the incomplete information data and complementary information data, and writes the incomplete information data into the storage medium. The data restoration machine includes a first storage unit for recording the incomplete information data, and a second storage unit for recording the complementary information data which is the data omitted from the complete information data. The data restoration machine combines the incomplete information data with the complementary information data to create the complete information data.