Method and apparatus for preventing illegal copying and illegal installation of information on an optical recording medium

摘要

An information processing apparatus is characterized in that it is arranged to generate a second processing signal by changing a part of data of a first processing signal, which is obtained by error-correction coding processing with respect to main information, so that an intentional error occurs, and to change said second processing signal to an extent that said intentional error can be corrected by an error correction processing section.