| 摘要 |
PROBLEM TO BE SOLVED: To prevent unauthorized copy by recording an identification signal expressing whether contents recorded on an information record medium are original or not in an error-correcting code. SOLUTION: Multimedia data (analog contents) are digitized through precedures of a sampling and quantization, Thereafter, the digital data are subjected to an error-correcting coding in an error-correcting coding circuit 2 in order to correct an error to be generated in a transmission path. Then, an identification signal expressing whether a disk (information recording medium) is original or not is inserted into the digital data data subjected to the error-correcting coding in an identification information inserting circuit 3. In this insertion, specific symbols of analog contents and the idenfication information are replaced and the analog contents into which the identification information are inserted are recorded on the information recording medium. |
