Method for controlling access to disc data and method for indentifying disc

A method for controlling access to data of a disc, comprising the steps of:

• determining whether or not q-channel information of a sub-code in a table-of-contents TOC of the disc, the q-channel information being intrinsic to a writable disc has been detected from data that had been read from a disc having a data area in which data is recorded, a lead-in area that is formed at a position that is earlier read than the data area and on which index data of the data recorded in the data area is recorded, and a lead-out area formed on the outer periphery side of the data area, and determining whether the address field ADR of the TOC is set to ADR=5;
• when the determined result represents that the q-channel information intrinsic to a writable disc has been detected and the ADR is set to 5, determining that the disc is a writable disc and restricting at least a regular operation for the disc;
• and
• when the determined result represents that the q-channel information intrinsic to a writable disc has not been detected, determining that the disc is not a writable disc and executing a regular operation for the disc.

A disc determining method, comprising the steps of:

• determining whether or not q-channel information of a sub-code in a table-of-contents TOC of the disc, the q-channel information being intrinsic to a writable disc has been detected from data that had been read from a loaded disc, and determining whether the address field ADR of the TOC is set to ADR=5;
• when the determined result represents that the q-channel information intrinsic to a writable disc has been detected and the ADR is set to 5, determining that the loaded disc is a writable disc;
• and
• when the determined result represents that the q-channel information intrinsic to a writable disc has not been detected, determining that the loaded disc is not a writable disc.