Optically recorded data discrimination apparatus and associated methodology

A method for reproducing optical disks, comprising the steps of;

• identifying each of the optical disks based on whether or not data at a predetermined position on a logical format in a data zone, obtained by reproducing the optical disk, includes predetermined data;
• controlling a reproducing operation based on a result of the identification;
• detecting an error in the data obtained by reproducing each of the optical disks;
• switching a processing for responding to the error detection based on the result of the identification;
• canceling the processing for responding to the error when the data in which an error has been detected is control data related to an operation.

An apparatus configured to reproduce data stored on an optical disc, comprising;

• a determining module configured to identify the optical disk by determining if data at a predetermined position on a logical format in a data zone, obtained by reproducing the optical disk, includes predetermined data;
• a detecting module configured to detect an error in the data obtained by reproducing the optical disk;
• a processor configured to respond to the error detection by causing the apparatus to reread data from the optical disk;
• and
• a switching module configured to switch a number of times, or a period of time the data is reread until correct data is obtained based on the result of the identification.

A system for identifying an optical disk, comprising:

• means for identifying each of the optical disks based on whether or not data at a predetermined position on a logical format in a data zone, obtained by reproducing the optical disk, includes predetermined data;
• means for controlling a reproducing operation based on a result of the identification;
• means for detecting an error in the data obtained by reproducing each of the optical disks;
• means for responding to the error detection by rereading data from each of the optical disks;
• and
• means for switching a number of times, or a period of time the data is reread until correct data is obtained based on the result of the identification.

A system for identifying an optical disk, comprising:

• means for identifying each of the optical disks based on whether or not data at a predetermined position on a logical format in a data zone, obtained by reproducing the optical disk, includes predetermined data;
• means for controlling a reproducing operation based on a result of the identification;
• means for detecting an error in the data obtained by reproducing each of the optical disks;
• means for switching a processing for responding to the error detection based on the result of the identification;
• means for canceling the processing for responding to the error when the data in which an error has been detected is control data related to an operation.