Optical disk drive for driving copy-controlled CD
AssigneeTEAC Corporation
InventorTakashi Miyamoto
Life of this patent
Estimating the term…
Abstract
An optical disk drive for driving an out-of-specification disk such as a CCCD. When the out-of-specification disk, such as a CCCD (Copy-Controlled CD), is loaded in the optical disk drive, a system controller of the optical disk drive reads TOC data in a first session and TOC data in a second session. When a contradiction exists between the TOC data in the second session and the TOC data in the first session, the system controller deems the disk to be not a within-specification disk but an out-of-specification disk, thereby diminishing the number of retry operations for reading data or a retry time, and reading data by means of generating a synchronization bit SYNC through use of an internal counter.
Claims9
An optical disk drive for reading data from a digital audio compact disk, comprising:
- means for reading TOC data recorded on said digital audio compact disk;
- detection means for detecting that false data are included in said TOC data;
- and
- processing means which, when said false data are included in said TOC data, deems said digital audio compact disk to be an out-of-specification disk and performs reading operation differing from that performed in the case of a within-specification disk whose TOC data are normal.
An optical disk drive which reads data from a digital audio compact disk and operates in accordance with a command from a computer, the optical disk drive comprising:
- said digital audio compact disk being formed from a plurality of sessions;
- a plurality of said sessions each including TOC data;
- TOC data reading means for reading TOC data from said digital audio compact disk;
- detection means which compares TOC data sets in a plurality of said sessions and detects that false TOC data are included when a contradiction exists between said TOC data sets;
- and
- data read means which, when reading data from said digital audio compact disk in a case where said false TOC data are included, reduces at least one of the number of retry operations and a retry time, which are to be performed when reading operation has ended in failure, as compared with a default value, to thus read said data.
An optical disk drive which reads data from a digital audio compact disk and operates in accordance with a command from a computer, the optical disk drive comprising:
- said digital audio compact disk being formed from a plurality of sessions;
- a plurality of said sessions each including TOC data;
- TOC data reading means for reading TOC data from said digital audio compact disk;
- detection means which compares TOC data sets in a plurality of said sessions and detects that false TOC data are included when a contradiction exists between said TOC data sets;
- and
- data read means which, when reading data from said digital audio compact disk in a case where said false data are included, reads said data by means of switching at least a portion of synchronization data included in said digital audio compact disk to synchronization data generated by an internal counter on the basis of a count thereof, to thus read data.
Dependencies are inferred from the claim text.