Disk having unique code for identifying its type for optical disk player and method for discriminating types thereof

An optical disk usable with an optical disk player, comprising:

• a BCA (Burst Cutting Area) code area in which a BCA code is written, the BCA code including BCA information and a disk code indicating a type of said disk, said BCA code area comprising:
• a re-synchronizing byte area including the BCA information, the disk code and a corresponding BCA re-synchronizing byte, said re-synchronizing byte area comprising
• a preamble area in which a BCA preamble is written;
• an information data area in which the BCA information is written;
• an information parity area in which an error detecting code for the BCA information is written;
• a disk code area in which the disk code is written;
• a disk code parity area in which an error detecting code for the disk code is written;
• an error correcting parity area in which an error correcting code for the BCA information, for the error detecting code of the BCA information, for the disk code, and for the error detecting code of the disk code is written;
• and
• a postamble area in which a BCA postamble is written.

An optical disk usable with an optical disk player, comprising:

• a BCA (Burst Cutting Area) code area in which a BCA code is written, the BCA code including BCA information and a disk code indicating a type of said disk, said BCA code area comprising:
• a re-synchronizing byte area including the BCA information, the disk code and a corresponding BCA re-synchronizing byte;
• and
• said re-synchronizing code area comprises:
• a disk code area in which the disk code is written;
• a disk code parity area in which an error detecting code for the disk code is written;
• and
• an error correcting parity area in which an error correcting code for the disk code and for the error detecting code of the disk code is written.

A method of discriminating the type of a disk used in an optical disk player, comprising:

• writing a BCA (Burst Cutting Area) code including a unique disk code indicating a type of said disk in a BCA code area defined in a lead-in area of said disk;
• reading data written in said BCA code area upon mounting said disk into said optical disk player;
• extracting the disk code contained in the read data;
• and
• confirming the type of said disk corresponding to the extracted disk code by retrieving a disk code table in which a plurality of disk codes corresponding to a plurality of types of disks are mapped,
• wherein said writing operation comprises:
• writing a BCA preamble in a preamble area situated at a front of said BCA code area;
• writing BCA information data in an information data area of said BCA code area and following said preamble area;
• writing an error detection code for said BCA information data in an information parity area of said BCA code area and following said information data area;
• writing a unique disk code indicating a type of said disk in a disk code area of said BCA code area and following said information parity area;
• writing an error detecting code for said disk code in a disk code parity area of said BCA code area and following said disk code area;
• writing an error correcting code for said BCA information data, for said error detecting code of said BCA information data, for said disk code and for said error detecting code of said disk code in an error correcting parity area of said BCA code area and following said disk code parity area;
• and
• writing a BCA postamble in a postamble area of said BCA code area and following said error correcting parity area.

An optical disk player to discriminate a type of an optical disk loaded in the optical disk player, wherein the optical disk has a Burst Cutting Area (BCA) which stores a BCA code including a disk code indicating the type of disk, the optical disk player comprising:

• an optical pickup to retrieve an information signal including the BCA code from the optical disk;
• an amplifier to amplify the information signal including the BCA code;
• a digital signal processor (DSP) to demodulate the amplified information signal including the BCA code;
• and
• a processing unit to extract the disk code from the BCA code of the demodulated amplified information signal, to retrieve a disk code table having disk codes corresponding to a plurality of different types of optical disks previously stored therein, and to determine the type of the optical disk loaded in the optical disk player by comparing the disk code with the disk code table,
• wherein the BCA code area includes a BCA preamble, BCA information, an error detecting code for the BCA information, the disk code, an error detecting code for the disk code, an error correcting code for the BCA information, for the error detecting code of the BCA information, for the disk code and for the error detecting code of the disk code, in order, and said processing unit determines the disk code to be following the error detecting code of the BCA information and before the error detecting code for the disk code.