Optical recording medium with different wobble characteristics between the user data area and the lead-out area

Abstract

An optical recording medium has a user data area and a lead-out area, wherein the user data area and the lead-out area each has grooves and lands formed thereon. Wobbles are formed on at least one lateral surface of grooves of the user data area and the lead-out area, and configured such that wobble characteristics are made different between the user data area and the lead-out area. Different types of wobbles are formed on the grooves of either the user data area or the lead-out area, thereby preventing an optical pickup that performs recording/reproduction from deviating from the user data area. Also, in a multi-layer optical recording medium, a whole area of a recording layer is configured to have a same condition, thereby preventing deterioration in reproduction and/or recording due to a difference in light power transmittance of another recording layer.

What is claimed is: 
     
       1. An optical recording medium comprising:
 ana user data area comprising first wobbles modulated by a first modulation method and having a first modulation frequency; and 
 a lead-out area comprising second wobbles modulated by a second modulation method and having a second modulation frequency, 
 wherein the first modulation frequency is different from the second modulation frequency. 
 
     
     
       2. An apparatus for reproducing data from an information storage medium, the information storage medium comprising an a user data area and a lead-out area, the user data area comprising first wobbles modulated by a first modulation method and having a first modulation frequency and a, the lead-out area comprising second wobbles modulated by a second modulation method and having a second modulation frequency, the apparatus comprising:
 a pickup unit configured to emit a light to transfer data with respect to the information storage medium; and 
 a controller configured to control the pickup unit to reproduce the first second wobbles of the first lead-out area, and configured to reproduce predetermined data recorded on in the first lead-out area, 
 wherein the first modulation frequency is different from the second modulation frequency. 
 
     
     
       3. An apparatus for reproducing data from and recording data from and on an information storage medium, the information storage medium comprising an a user data area and a lead-out area, the user data area comprising first wobbles modulated by a first modulation method and having a first modulation frequency and a, the lead-out area comprising second wobbles modulated by a second modulation method and having a second modulation frequency, the apparatus comprising:
 a pickup unit configured to emit a light to transfer data with respect to the information storage medium; and 
 a controller configured to control the pickup unit to reproduce the first second wobbles of the first lead-out area, 
 wherein the first modulation frequency is different from the second modulation frequency. 
 
     
     
       4. A method for recording data on an information storage medium, the information storage medium comprising an a user data area and a lead-out area, the user data area comprising first wobbles modulated by a first modulation method and having a first modulation frequency and a, the lead-out area comprising second wobbles modulated by a second modulation method and having a second modulation frequency, the second wobbles differing from the first wobbles, the apparatus method comprising:
 recording data on one recording layer of the information storage medium, 
 wherein the recording of the data comprises recording in the user data in the lead-out area according to the second wobbles, which that differ from the first wobbles. 
 
     
     
       5. The method of recording of  claim 4 , further comprising maintaining tracking during interlayer jumping between recording layers from from an outermost circumferences circumference of the one recording layers layer of the information storage medium to an outermost circumference of another recording layer of the information storage medium according to the second wobbles. 
     
     
       6. The method of  claim 4 , further comprising forming the second wobbles in the lead-out area wherein the recording of the data in the lead-out area comprises recording the data in the lead-out area using an optical pickup according to the second wobbles to prevent an the optical pickup from deviating from the user data lead-out area. 
     
     
       7. The method of  claim 4 , wherein the information storage medium comprises a plurality of recording layers. 
     
     
       8. An apparatus for reproducing data from an information storage medium, the information storage medium comprising a user data area and a lead-out area, the user data area comprising first wobbles modulated by a first modulation method and having a first modulation frequency, the lead-out area comprising second wobbles modulated by a second modulation method and having a second modulation frequency, the apparatus comprising:
 a pickup unit to emit light to transfer data with respect to the information storage medium; and   a controller to control the pickup unit to reproduce user data from the user data area comprising the first wobbles; wherein   the first modulation frequency is different from the second modulation frequency.   
     
     
       9. An apparatus for reproducing data from and recording data on an information storage medium, the information storage medium comprising a user data area and a lead-out area, the user data area comprising first wobbles modulated by a first modulation method and having a first modulation frequency, the lead-out area comprising second wobbles modulated by a second modulation method and having a second modulation frequency, the apparatus comprising:
 a pickup unit configured to emit light to transfer data with respect to the information storage medium; and   a controller configured to control the pickup unit to reproduce user data from the user data area comprising the first wobbles and reproduce the second wobbles of the lead-out area;   wherein the first modulation frequency is different from the second modulation frequency.   
     
     
       10. A method for recording data on an information storage medium, the information storage medium comprising a user data area and a lead-out area, the user data area comprising first wobbles modulated by a first modulation method and having a first modulation frequency, the lead-out area comprising second wobbles modulated by a second modulation method and having a second modulation frequency, the second wobbles thereby differing from the first wobbles, the apparatus comprising:
 recording data on one recording layer of the information storage medium;   wherein the recording of the data comprises recording data in the user data area according to the first wobbles and recording data in the lead-out area according to the second wobbles.