Patent ID: 7233667

Claim:
A method of embedding identification information in a main body of data of a digital record medium, comprising: error correction encoding digital data to correct an error occurring during transmission of the main body of data; embedding, based on position information, the identification information in a part of the main body of data upon which the error correction encoding has been performed; embedding the position information, after embedding the identification information; and storing the main body of data, including the embedded identification information and the embedded position information, into the digital record medium, wherein said identification information has a plurality of partial identification information; an information to acquire the embedded position of said identification information has an initial value information, an embedded position information indicating an embedded position of said plurality of partial identification information, and a plurality of position information to acquire a position of said embedded position information; a first position information to acquire the position of said embedded position information is recorded at a position obtained by converting said initial value information by a predetermined function or a position shown by a position obtained as a result of the conversion; and a second or later position information is recorded in another position of the position obtained by converting a storage information of a position of a result when an information stored at another position of a side where said position information is not stored is further converted by said predetermined function in any positions obtained by a conversion result of said predetermined function, or a storage information at a position indicated to a position of a result of conversion one by one.