Control apparatus, control method, access apparatus, access method, program, and write-once recording medium
A control apparatus is provided for controlling an access means for accessing a recording medium containing at least one area so that the access means accesses the at least one area. The apparatus comprises a means for determining whether or not at least one first recorded area storing data is included in the at least one area, and a means for controlling the access means. When it is determined that the at least one first recorded area is included in the at least one area, the control means controls the access means based on a result of accessing the at least one first recorded area.
1. A control apparatus for controlling an access means for accessing a recording medium, the recording medium having a plurality of recording layers, the recording medium including an area for reproduction adjustment in which a recorded area for adjusting a control parameter is formed, an OPC area for performing a trial recording, and a defect management area for recording a defect management information, at least one area for reproduction adjustment and at least one OPC area being included in each of the plurality of recording layers, the control apparatus comprises:
a determining means for determining whether or not the recorded area is included in the area for reproduction adjustment included in each of the plurality of recording layers, and
a control means, wherein
when the determining means determines that the recorded area is included in the area for reproduction adjustment in a predetermined one recording layer of the plurality of recording layers, the control means is configured to control the access means to access the area for reproduction adjustment in the predetermined one recording layer, measure a reproduction indicator of a signal obtained from the area for reproduction adjustment in the predetermined one recording layer, adjust the control parameter for the predetermined one recording layer based on the measuring result, and control the access means in the predetermined one recording layer based on the adjusting result, and
when the determining means determines that the recorded area is not included in the area for reproduction adjustment in the predetermined one recording layer of the plurality of recording layers, the control means is configured to control the access means such that the access means records an area for OPC adjustment for performing an adjustment of the control parameter on the OPC area in the predetermined one recording layer, control the access means such that the access means accesses the area for OPC adjustment in the predetermined one recording layer which is recorded by the access means, measure the reproduction indicator of a signal obtained from the area for OPC adjustment in the predetermined one recording layer, perform an adjustment of the control parameter for the predetermined one recording layer based on the measuring result, and control the access means in the predetermined one recording layer based on the adjusting result.
2. A control apparatus according to claim 1 , wherein the area for reproduction adjustment is an area to be recorded at the time of performing a physical formatting process.
3. A control apparatus according to claim 1 , wherein measuring of the reproduction indicator and adjusting of the control parameter are performed in the area for reproduction adjustment or the area for OPC adjustment.
4. A control apparatus according to claim 1 , wherein the reproduction indicator includes at least one of a jitter, MLSE (Maximum Likelihood Sequence Error), servo error, and amplitude of the signal.
5. A control apparatus according to claim 1 , wherein the area for reproduction adjustment is an area to be recorded after performing the adjustment of the control parameter for the predetermined one recording layer.
6. A control apparatus according to claim 1 , wherein when the determining means determines that the recorded area is not included in the area for reproduction adjustment in the predetermined one recording layer, the control means is configured to control the access means to record all area of the area of reproduction adjustment in the predetermined one recording layer, after performing the adjustment of the control parameter for the predetermined one recording layer.
7. A control apparatus according to claim 1 , wherein the recording medium is a write-once recording medium.
8. A control method for controlling an access means for accessing a recording medium, the recording medium having a plurality of recording layers, the recording medium including an area for reproduction adjustment in which a recorded area for adjusting a control parameter is formed, an OPC area for performing a trial recording, and a defect management area for recording a defect management information, at least one area for reproduction adjustment and at least one OPC area being included in each of the plurality of recording layers, the control method comprises the steps of:
determining whether or not the recorded area is included in the area for reproduction adjustment included in each of the plurality of recording layers, and
controlling the access means, wherein the controlling step includes, when in the determining step it is determined that the recorded area is included in the area for reproduction adjustment in a predetermined one recording layer of the plurality of the recording layers, a step of controlling the access means to access the area for reproduction adjustment in the predetermined one recording layer, a step of measuring a reproduction indicator of a signal obtained from the area for reproduction adjustment in the predetermined one recording layer, and adjusting the control parameter for the predetermined one recording layer based on the measuring result, and a step of controlling the access means based on the adjusting result, and
when in the determining step it is determined that the recorded area is not included in the area for reproduction adjustment in the predetermined one recording layer of the plurality of recording layers, a step of controlling the access means such that the access means records an area for OPC adjustment for performing an adjustment of the control parameter on the OPC area in the predetermined one recording layer, a step of controlling the access means such that the access means accesses the area for OPC adjustment in the predetermined one recording layer which is recorded by the access means, a step of measuring the reproduction indicator of a signal obtained from the area for OPC adjustment in the predetermined one recording layer, and performing an adjustment of the control parameter for the predetermined one recording layer based on the measuring result, and a step of controlling the access means in the predetermined one recording layer based on the adjusting result.
9. A control method according to claim 8 , wherein the area for reproduction adjustment is an area to be recorded at the time of performing a physical formatting process.
10. A control method according to claim 8 , wherein measuring of the reproduction indicator and adjusting of the control parameter are performed in the area for reproduction adjustment or the area for OPC adjustment.
11. A control method according to claim 8 , wherein the reproduction indicator includes at least one of a jitter, MLSE (Maximum Likelihood Sequence Error), servo error, and amplitude of a signal.
12. A control method according to claim 8 , wherein the area for reproduction adjustment is an area to be recorded after performing the adjustment of the control parameter for the predetermined one recording layer.
13. A control method according to claim 8 , wherein when in the determining step it is determined that the recorded area is not included in the area for reproduction adjustment in the predetermined one recording layer, the control step includes a step of controlling the access means to record all area of the area of reproduction adjustment in the predetermined one recording layer, after performing the adjustment of the control parameter for the predetermined one recording layer.
14. A control apparatus according to claim 8 , wherein the recording medium is a write-once recording medium.