Method for dynamically detecting writing quality of a recordable optical disc
View Patent ↗The present invention discloses a method for dynamically detecting writing quality of a recordable optical disc. According to the method, firstly a current detecting position located on a program area of the recordable optical disc is set. Then the recordable disc drive proceeds data recording in the program area with an optimal write power. The recordable disc drive paused data recording when a recording position exceeds or is equal to the current detecting position. Then the recordable disc drive reproduces pre-recorded data in the tracks of the recordable optical disc to perform OPC for modifying the optimal write power and calculating a jitter value. Thereafter a following detecting position is modified based on the jitter value and data recording is restarted in the program area with the modified optimal write power until the recording position exceeds or is equal to the modified following detecting position.
1. A method for dynamically detecting writing quality of a recordable optical disc, comprising:
setting a current detecting position located on a program area of the recordable optical disc;
proceeding data recording in the program area with an optimal write power;
pausing data recording when a recording position exceeds or is equal to the current detecting position;
reproducing pre-recorded data in the tracks of the recordable optical disc to modify the optimal write power and to calculate a criterion of writing quality;
modifying a following detecting position based on the criterion of writing quality; and
restarting data recording in the program area with the modified optimal write power until the recording position exceeds or is equal to the modified following detecting position.
2. The method according to claim 1 wherein the reproducing step further comprises steps of:
performing OPC to calculate a β value for compensating the optimal write power.
3. The method according to claim 1 wherein the reproducing step further comprises steps of:
performing OPC to calculate a β value for amending a write strategy.
4. The method according to claim 1 wherein the criterion of writing quality is a jitter value.
5. The method according to claim 4 wherein the method further comprises steps of:
lowering a recording speed when the jitter value is extremely higher than a specified value.
6. The method according to claim 4 wherein an interval between the modified following detecting position and the current detecting position is set to be longer than a basic distance when the jitter value is lower than the specified value.
7. The method according to claim 4 wherein an interval between the modified following detecting position and the current detecting position is set to be shorter than a basic distance when the jitter value is close to or higher than the specified value.
8. A method for dynamically detecting writing quality of a recordable optical disc, comprising:
setting a current detecting position located on a program area of the recordable optical disc;
proceeding data recording in the program area with an optimal write power;
pausing data recording when a recording position exceeds or is equal to the current detecting position;
reproducing pre-recorded data in the tracks of the recordable optical disc to perform OPC for modifying the optimal write power and calculating a read error rate;
modifying a following detecting position based on the read error rate; and
restarting data recording in the program area with the modified optimal write power until the recording position exceeds or is equal to the modified following detecting position.
9. The method according to claim 8 wherein performing OPC further comprises steps of:
calculating a β value for compensating the optimal write power.
10. The method according to claim 8 wherein performing OPC further comprises steps of:
calculating a β value for amending a write strategy.
11. The method according to claim 8 wherein the method further comprises steps of:
lowering a recording speed when the read error rate is extremely higher than a specified value.
12. The method according to claim 8 wherein an interval between the modified following detecting position and the current detecting position is set to be longer than a basic distance when the read error rate is lower than the specified value.
13. The method according to claim 8 wherein an interval between the modified following detecting position and the current detecting position is set to be shorter than a basic distance when the read error rate is close to or higher than the specified value.