Method of optimal power calibration

Abstract

A method of optimal power calibration adapted to rewritable or recordable disks is disclosed. In addition to an original power calibration area (PCA) in the inner track of a disk, another rearranged PCA is allocated in the lead-out area of the outmost track. Two optimal power calibration processes are performed on both of the power calibration areas allocated on the inner and outmost tracks to respectively derived optimal recording powers. A relation curve is established by using these two optimal recording powers that this relation curve describes the relationships between the optimal recording powers of the recording positions and the distances from these recording positions to the center of the optical storage disk. Required optimal recording power of any recording position can be derived from the relation curve while performing data recording operations.

1. A data recording method for an optical storage medium comprising:
 performing a first optimal  power calibration process on an original power calibration area of said optical storage medium;  
 obtaining a first optimal  recording power while performing said first optimal  calibration process;  
 performing a second optimal  power calibration process on a rearranged power calibration area of said optical storage medium;  
 obtaining a second optimal  recording power while performing said second optimal  calibration process;  
 deriving a characteristic information illustrative of overall optimal  recording powers of said optical storage medium by using said first optimal  recording power and said second optimal  recording power, wherein the characteristic information is based on a polynomial equation; and  
 performing a data recording operation on said optical storage medium by using an optimal  a recording power derived from said characteristic information.  
 
     
     
       2. The method according to  claim 1 , wherein said optical storage medium is a rewritable (CD-RW) disk or a recordable (CD-R) disk. 
     
     
       3. The method according to  claim 1 , wherein said original power calibration area is allocated in an inner track of said optical storage medium and said second power calibration area is rearranged on an outmost track of said optical storage medium. 
     
     
       4. The method according to  claim 3 , wherein said second power calibration area is rearranged inside a lead-out area of said optical storage medium. 
     
     
       5. The method according to  claim 4 , wherein said second power calibration area holds at most 30 seconds of data while said optical storage medium is being accessed. 
     
     
       6. The method according to  claim 1 , wherein said characteristic information illustrative of said overall optimal  recording powers is a relation curve established by using said first optimal  recording power and said second optimal  recording power. 
     
     
       7. The method according to  claim 6 , wherein said relation curve illustrates a relationship between an optimal  a recording power of a recording position of said optical storage medium and a distance from said recording position to a center of said optical storage medium. 
     
     
       8. The method according to  claim 7 , wherein said optimal  recording power of said recording position inside said optical storage medium is mapped out from said relation curve. 
     
     
       9. A method of deriving an optimal  a recording power for a recording position of an optical storage medium comprising:
 performing a first optimal  power calibration process on an original power calibration area of said optical storage medium, wherein said original power calibration area is allocated in an inner track of said optical storage medium;  
 obtaining a first optimal  recording power from said original power calibration area while performing said first optimal  power calibration process;  
 performing a second optimal  power calibration process on a rearranged power calibration area of said optical storage medium, wherein said rearranged power calibration area is allocated in an outmost track of said optical storage medium;  
 obtaining a second optimal  recording power while performing said first optimal  power calibration process;  
 establishing a relation curve by using said first optimal  recording power and said second optimal  recording power, wherein the relation curve is based on a polynomial equation; and  
 deriving an optimal  a recording power for any recording position of said optical storage medium from said relation curve.  
 
     
     
       10. The method according to  claim 9 , wherein said optical storage medium is a rewritable (CD-RW) disk or a recordable (CD-R) disk. 
     
     
       11. The method according to  claim 9 , wherein said second power calibration area is rearranged inside a lead-out area of said optical storage medium. 
     
     
       12. The method according to  claim 11 , wherein said second power calibration area holds at most 30 seconds of data while said optical storage medium is being accessed. 
     
     
       13. The method according to  claim 9 , wherein said relation curve illustrates a relationship between said optimal  recording power of said recording position inside said optical storage medium and a distance from said recording position to a center of said optical storage medium. 
     
     
       14. The method according to  claim 13 , wherein said optimal  recording power of said recording position inside said optical storage medium is mapped out from said relation curve. 
     
     
       15. An optical storage medium having at least one data session for storing data comprising:
 a first power calibration area in an inner track of said optical storage medium, wherein a first optimal  power calibration process is performed on said first power calibration area to derive a first optimal  recording power;  
 a second power calibration area in an outmost track of said optical storage medium, wherein a second optimal  power calibration process is performed on said second power calibration area to derive a second optimal  recording power; and  
 a program area allocated between said first power calibration area and said second power calibration area, wherein an optimal  recording power of a recording position inside said program area is derived from a relation curve established by using said first optimal  recording power and said second optimal  recording power, wherein the relation curve is based on a polynomial equation.  
 
     
     
       16. The optical storage medium according to  claim 15 , wherein said optical storage disk is a rewritable (CD-RW) disk or a recordable (CD-R) disk. 
     
     
       17. The optical storage medium according to  claim 15 , wherein said second power calibration area holds at most 30 seconds of data while said optical storage medium is accessed. 
     
     
       18. The optical storage medium according to  claim 15 , wherein said relation curve illustrates a relationship between said optimal  recording power of said recording position and a distance from said recording position to a center of said optical storage medium. 
     
     
       19. The optical storage medium according to  claim 18 , wherein said optimal  recording power of said recording position inside said optical storage disk is mapped out from said relation curve. 
     
     
       20. The optical storage medium according to  claim 15 , wherein an identity optical power calibration pattern is used to store into said first power calibration area and said second power calibration area while performing said first optimal  power calibration process and said second optimal  power calibration process. 
     
     
       21. A data recording method for an optical storage medium comprising:
   performing a first power calibration process on an original power calibration area of said optical storage medium to obtain a first recording power;        performing a second power calibration process on a rearranged power calibration area of said optical storage medium to obtain a second recording power;        deriving a characteristic information based on said first recording power and said second recording power, wherein the characteristic information is based on a polynomial equation; and        performing a data recording operation on said optical storage medium by using a recording power derived from said characteristic information.     
     
     
       22. An optical storage drive, comprising:
   a head configured to record or read:      a first power calibration area in an inner track of said optical storage medium for deriving a first recording power;        a second power calibration area in a non - data - operation area of said optical storage medium for deriving a second recording power; and        a program area allocated between said first power calibration area and said second power calibration area, wherein a recording power of a recording position inside said program area is derived from a relation curve established by using said first recording power and said second recording power, wherein the relation curve is based on a polynomial equation.       
     
     
       23. An apparatus for determining an optical recording power, comprising:
   an optical recording head; and        a disk drive coupled to the optical recording head, wherein the optical recording head is configured to record onto an optical disk or read from the optical disk:      a first power calibration area in an inner track of the optical disk to derive a first recording power,        a second power calibration area in a non - data - operation area of the optical disk to derive a second recording power, and        a program area allocated between the first power calibration area and the second power calibration area, wherein a recording power of a recording position inside the program area is derived from a relation curve established by using the first recording power and the second recording power, wherein the relation curve is based on a polynomial equation.       
     
     
       24. The apparatus of  claim 23  wherein the non- data - operation area of the optical disk is an outmost track.