RECORD MEDIUM AND ITS REPRODUCER, REPRODUCING METHOD, RECORD MEDIUM MANUFACTURING APPARATUS, RECORD MEDIUM MANUFACTURING METHOD, AND RECORDER

摘要

Reproduction information of a record medium (1) is arithmetically operated with additional information used as a coefficient, has a higher quality than that of basic information, and therefore has a quantity larger than basic information. Recording the information on another record medium as it is requires a large quantity of record mediums. Thus, it is difficult to duplicate recorded data to another record medium.