Source: https://patents.google.com/patent/US7916588?oq=5920316
Timestamp: 2018-03-22 09:28:01
Document Index: 770838759

Matched Legal Cases: ['§119', 'Application No. 2003', 'Application No. 2004', 'Application No. 200480024712', 'application No. 2004', 'application No. 2004']

US7916588B2 - Control apparatus, control method, access apparatus, access method, program, and write-once recording medium - Google Patents
Control apparatus, control method, access apparatus, access method, program, and write-once recording medium Download PDF
US7916588B2
US7916588B2 US10968723 US96872304A US7916588B2 US 7916588 B2 US7916588 B2 US 7916588B2 US 10968723 US10968723 US 10968723 US 96872304 A US96872304 A US 96872304A US 7916588 B2 US7916588 B2 US 7916588B2
US10968723
US20050111281A1 (en )
This nonprovisional application claims priority under 35 U.S.C. §119(a) on Patent Application No. 2003-358668 filed in Japan on Oct. 20, 2003 and Patent Application No. 2004-058281 filed in Japan on Mar. 2, 2004, the entire contents of which are hereby incorporated by reference.
However, in some types of rewritable or write-once optical discs (e.g., BD), control information is recorded in the form of wobble of a track at an inner peripheral portion of the optical disc (wobble recording method). Therefore, such optical discs do not necessarily have a recorded area which can be used to measure a reproduction quality indicator (e.g., jitter, etc.). As result, it is difficult to perform adjustment based on a reproduction quality indicator for an optical disc which has no recorded area.
In one embodiment of this invention, when it is not determined that the at least one first recorded area is not included in the at least one area. The access means is controlled so that the access means records data into at least one of the at least one area based on access means control data for controlling the access means, which has been previously recorded in the recording medium. The access means is controlled so that the access means accesses at least one third recorded area in which the data has been is recorded, based on the access means control data. Based on a result of accessing the at least one third recorded area, the access means is controlled.
According to another aspect of the present invention, a control method 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 method comprises determining whether or not at least one first recorded area storing data to included in the at least one area, and 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 access means is controlled based on a result of accessing the at least one first recorded area.
According to another aspect of the present invention, a program is provided for executing a control process 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 control process comprises determining whether or not at least one first recorded area storing data is included in the at least one area, and controlling the access means. When it is determined that the at least lone first recorded area is included in the at least one area, the access means is controlled based on a result of accessing the at least one first recorded area.
According to the present invention, a recorded area can be efficiently searched for by searching areas having a high possibility of being a recorded area (a defect management area or a control data area). Therefore, it is possible to reduce a time required for start up after an optical disc is mounted.
Thus the invention described herein makes possible the advantages of providing: (1) an access apparatus having high reproduction quality, which performs adjustment based on a reproduction quality indicator for an optical disc which has no recorded area; (2) an access apparatus capable of efficiently determining whether or not an optical disc has a recorded area, in order to achieve high-speed startup using a recorded area; (3) an access apparatus, in which the reliability of determining whether data is recorded or unrecorded in an optical disc can be improved in order to determine whether or not an optical disc has a recorded area when various reproduction control parameters are not sufficiently adjusted partway through a startup process; (4) an access apparatus for changing an unrecorded area to a recorded area in order to use such an area for the next startup; (5) an access apparatus, which performs a recorded area search process and a learning process for each of a plurality of recording layers having different characteristics in a multi-layer recording medium; (6) an access apparatus capable of efficiently searching a rewritable optical disc and a write-once optical disc, which have different recording sequences, for a recorded area; (7) an access apparatus capable of searching a rewritable optical disc and a write-once optical disc in similar manners; and (8) an access apparatus which uses an area, which is recorded upon a physical formatting process, for the next startup of a rewritable optical disc and a write-once optical disc.
FIG. 11 is a flowchart showing a startup procedure, in which the recording/reproductlon apparatus of FIG. 2 starts up the double layer rewritable optical disc of FIG. 10.
FIG. 15 is a flow chart showing a physical formatting procedure for a double layer optical disc.
The rewritable optical disc 100 contains a PIC (Permanent Information and Control data) area 101, a data zone 107, a protection zone 102, a protection zone 109, a first INFO area 106, a second INFO area 103, a third INFO area 108, an OPC (Optimum Power Calibration) area 104, and a reserved area 106.
For example, a largest address of the data zone 107 and a recording pulse control parameter are recorded in the PIC area 101. The recording pulse control parameters include, for example, information about a laser power for forming/erasing a mark onto/from an optical disc, and information about a recording pulse width for recording a correct mark. In the PIC area 101, information is recorded in the form of wobble of a track, and therefore, such a data recording method is different from ordinary data recording methods which form a mark on a recording film of a track. Therefore, a,reproduction signal quality indicator, such as Jitter or the like, cannot be measured in the PIC area 101.
The third INFO area 108 contains a fourth buffer area 141, a fifth buffer area 144 and a sixth buffer area 147 for preventing interference from an adjacent area; a third DMA area 142 and a fourth DMA area 145 for storing a list indicating positional information between a defective area and a replacement area for the defective area; and a third control data area 143 and the fourth control data area 146 for storing control information.
FIG. 2 shows a configuration of a recording/reproductlon apparatus 500 according to Embodiment 1 of the present invention.
The recording/reproductlon apparatus 500 is constructed o that an optical disc can be inserted thereinto. The optical disc is, for example, the rewritable optical disc 100.
FIG. 3 shows a startup procedure 1, in which the recording/reproductlon apparatus 600 starts up the optical disc 501.
Step S301: if the CPU 514 detects when the optical disc 501 is mounted, the CPU 514 outputs the laser light emission enable signal 522, which permits the laser drive circuit 50S to emit laser light. The laser drive circuit 505 emits laser light with a predetermined reproduction power.
Specifically, the CPU 514 reads out a recording pulse control parameter (access means control data for controlling the optical head apparatus 540), which is previously recorded in the PIC area 101, and sets the parameter into the laser drive circuit 505. Thereafter, the CPU 514 generates random data in the buffer 513. Further, the CPU 514 controls the ECC circuit 5f2 and the modulation/demodulation circuit 511 to output data in the buffer 513 to the laser drive circuit 505. The laser drive circuit 505 controls a laser power and a recording pulse width based on the recording pulse control parameter to convert the modulated data signal 533 into a light pulse. By irradiating the optical disc 501 with the light pulse, data is recorded onto the optical disc 501.
In the example described with reference to FIG. 3, step S305 and step S306 correspond to “determining whether or not at least one area includes at least one first recorded area in which,data has been recorded” (searching the optical disc 501 for a recorded area). Step S308 and step S309 correspond to “when it is determined that the at least one area does not include the at least one first recorded area, controlling an access means to record data into at least one of the at least one area” (when no recorded area is present on the optical disc 501, creating a recorded area for reproduction adjustment). Step S310 and step S311 correspond to “when it is determined that the at least one area includes the at least one first recorded area, controlling the access means based on a result of access to the at least one first recorded area” or “when it is not determined that the at least one area does not include the at least one first recorded area, controlling the access means so that the access means accesses the at least one second recorded area in which data has been recorded by the access means, based on a result of access to the at least one second recorded area” (performing reproduction adjustment for adjusting a control parameter required for reproduction).
For example, in the example described with reference to FIG. 3, when no recorded area is present, a reproduction adjustment area is created (steps S308, S309). However, in a reproductlon-only apparatus which performs only reproduction, no reproduction adjustment area can be created. The CPU 514 included in the reproduction-only apparatus controls the optical head apparatus 540 so that the optical head apparatus 540 reproduces an unrecorded area. The CPU 514 controls the optical head apparatus 540 based on a result of the reproduction of the unrecorded area. For example, a tracking error signal which indicates a deviation of a light beam spot from a track is generated based on the servo error signal 524 obtained by the reproduction of the unrecorded area. A reproduction control parameter is adjusted so that an amplitude of the tracking error signal is maximized.
Note it hat the process, which is performed when no recorded area is present, is not limited to this.
1-4 Recorded Area Search Procedure 1
FIG. 4 shows a recorded area search procedure 1 according to Embodiment 1 of the present invention.
Step S403: when it is determined that the second control data area 123 is a recorded area (Yes), the procedure goes to step S404. When it is determined that the second control data area 123 is an unrecorded area (No), the procedure goes to step 6406.
Thus, according to the recorded area search procedure 1 of Embodiment 1 of the present invention, only areas which have a high probability of being recorded areas are searched for a recorded area, there by making it possible to efficiently determine whether or not a disc is a recorded disc.
1-5. Recorded-State Determination Procedure 1
FIG. 5 shows a recorded-state determination procedure 1 according to Embodiment 1 of the present invention.
In the recorded-state determination procedure 1 of Embodiment 1 of the present invention, it is determined whether or not the data errors are within the error correction range. The present invention is not limited to this as long as it can be determined whether or not a recorded data is present, based on error correction codes. An LDC (Long Distance Code;) codeword, which is a physical error correction unit, may be utilized. For example, a threshold may be provided for the number of LDC code words which cannot be corrected.
1-6. Recorded-State Determination Procedure 2
FIG. 6 shows a recorded-state determination procedure 2 according to Embodiment 1 of the present invention.
Step S605: when a normal address has been obtained without detecting an address error, the CPU 514 increments the normal address acquisition counter by 1.
Step S606: no matter whether or not the address acquisition is successful, the CPU 514 increments the address detection counter by 1. indicating a measured address.
Step S607: it is determined whether or not the total number of measured addresses reaches a predetermined number. For example, in the case of BD, address information called AUN (Address Unit Number) is recorded with data in an interleaved manner. Sixteen AUNs are contained in a cluster which is a unit of recording/reproduction of a medium. Therefore, in the case of BD, the predetermined number of addresses is considered to be 16 for the purpose of testing one cluster of areas. When the value of the address detection counter is less than 16, one cluster of areas has not been completely tested, so that the procedure returns to step S603. When the value of the address detection counter is 16 or more, one cluster of areas has already been completely tested, and the procedure goes to step S608.
Step S6103 the number of addresses normally obtained is less than the predetermined number, and therefore, the CPU 514 determines that the tested area is an unrecorded area. The procedure is ended.
In the above-described recorded-state determination procedure 2, only AUN stored in subcode information of a BD has been described. The present inventions not limited to this. Any address information recorded along with data may be used. For example, in the case of DVD media, a data ID recorded at the head of each sector may be used. In the case of CD media, an address recorded along with data in a sub-channel (generally referred to as a Sub-Q address) may be used.
1-7. Recorded-State Determination Procedure 3
FIG. 7 shows a recorded-state determination procedure 3 according to Embodiment 1 of the present invention.
Hereinafter, the recorded-state determination procedure 3 according to Embodiment 1 of the present invention will be described step by step with reference to FIGS. 2 and 7. In the recorded-state determination procedure 3, the CPU 514 controls the optical head apparatus 540 so that the optical head apparatus 540 irradiates an optical disc with light and detects light reflected from the optical disc, and based on the amount of detected light,determines whether or not the optical disc has a recorded area.
Step S702: the servo circuit 509 allocates an amplitude detection counter (CTR2) in the internal RAM area, and initializes the counter value to 0. The amplitude detection counter is, for example, a counter which is incremented by 1 when the reproduction signal amplitude is sampled and the sampled amplitude value is, greater than or equal to a predetermined value.
Step S708: the servo circuit 509 references a timer value internally measured, and determines whether or not an elapsed time after activation of the timer is greater than or equal to a predetermined value. For example, the predetermined time designated by the CPU 514 is 15 ms. In this case, when the elapsed time is 315 ms or more, the procedure goes to step S709. On the other hand, when the elapsed time is less than 15 ms, the procedure returns to step S704, where sampling is continued.
The recorded-state determination procedures 1 to 3 have been described with reference to FIGS. 5 to 7. These procedures maybe used in combination as well as exclusively. For example, an area may be determined to be a recorded area when that area has a sampled reproduction signal amplitude which is greater than or equal to a predetermined value and the area can be reproduced.
Although an BD-RE optical disc has been described as an exemplary rewritable optical disc, a write-once BD-R optical disc (described below) has almost the same area arrangement as the BD-RE optical disk, including an OPC area and the like. For example, in a write-once optical disc, such as a BD-R or the like, when areas corresponding to the first to fourth control data areas (the areas 135, 123, 143, and 146) are,used as areas to be recorded when physical formatting is performed, but not the first to fourth DMA areas (the areas 134, 122, 142, and 145) and these areas are searched for when startup is performed, the present invention can be applied to such a write-once optical disc.
The first INFO area 806, the second INFO area 803 and the third INFO area 808 store defeat management information and control information. These areas have almost the same data structure as the respective structure of the first INFO area 106, the second INFO area 103 and the third INFO area 108 of the rewritable optical disc 100 described above, and will not be explained.
In the case of the write-once optical disc 800, once recorded, data cannot be overwritten. As described above, Embodiment 1 can be applied to the write-once optical disc 800 if the n-th control data area is used as a recorded area when the disc is initialized. In Embodiment 2, recording of the n-th DMA are a and the n-th control data area is performed only during finalization in which a disc is converted to a reproductlon-only disc. When the write-once optical disc 800 is used in a state which allows incremental recording, all of the first INFO area 806, the second INFO area 803, and the third INFO area 808 are unrecorded areas.
The configuration of an apparatus for recording/reproducing data to/from the write-once optical disc 800 is similar to that of the recording/reproduction apparatus 506 (see FIG. 2) and will not be explained.
A startup procedure 2 for starting up the write-once optical disc 800 by the recording/reproductlon apparatus 500 is similar to the startup procedure 1 (see FIG. 3) and will not be explained. Note that the startup procedure 1 is different from the startup procedure 2 in the details of the recorded area search procedure (step S305).
2-2. Recorded Area Search Procedure 2
FIG. 9 shows a recorded area search procedure 2 according to Embodiment 2 of the present invention.
Step S902 a recorded-state determination procedure is performed. For example, based on a signal reproduced from the management information temporary accumulation area 805, the CPU 514 determines whether or not the management information temporary accumulation area 805 is a recorded area. Note that details of the recorded-state determination procedure (step S902) are similar to those of any of the recorded-state determination procedures described with reference to FIGS. 5 to 7 and will not be explained.
Step S904: the CPU 514 stores an address, which is positional information of the management information temporary accumulation area 805 determined to be a recorded area into an internal memory thereof. The reason the address is stored is that the management information temporary accumulation area 805 is used to perform subsequent reproduction adjustment.
The second recording layer 1020 comprises a second layer PIC area 1021, a second layer second INFO area 1022, a second layer OPC area 1023, a second layer first INFO area 1024, a second layer data zone 1025, and a second layer third INFO area 1026,. The second recording layer 1020 has a data structure similar to that of the rewritable optical disc 100 (see FIG. 1), and since their correspondence is clear, will not be explained.
Step S1110: and step S1111 provide a first layer reproduction adjustment step of adjusting a control parameter required for reproduction of a first recording layer. Step S1119 and step S1120 provide a second layer reproduction adjustment step of adjusting a control parameter required for reproduction of a second recording layer. Servo control parameters, such as a focus position and a tilt, have been described above. However, reproduction parameters are not limited to these. Other examples of servo control parameter adjustment may include adjustment of a beam expander for correcting spherical aberration, adjustment of an offset of a servo circuit, adjustment of an offset of stray light, and adjustment of a gain of a servo signal. For example, a slice level may be adjusted when an analog signal is converted to a digital (binary) signal, or an attenuator value may be adjusted to optimize an amplification rate of a reproduction signal. In other words, a signal processing system adjustment may be performed. For example, an off set of a laser circuit maybe adjusted, or a gain of a laser-system control loop may be adjusted. In other words, laser system adjustment may be performed. Further, the number of reproduction parameters to be adjusted is not limited to two. One or more reproduction parameters may be adjusted.
In step S1110, step S1111, step S1119 and step S1120, a focus position and a tilt setting are searched for, which minimize a jitter value. Any method for adjusting an appropriate focus position and tilt setting may be used. For example, they maybe adjusted to minimize an MLSE (Maximum Likelihood Sequence Error).
The first recording layer 1510 contains a first layer second INFO area 1512, a first layer first INFO area 1514, and a first layer third INFO area 1516. The first recording layer 1510 has a data structure similar to that of the double layer rewritable optical disc 3000 (see FIG. 10), and since their correspondence is clear, will not be explained.
FIG. 14 shows a startup procedure 4, in which the recording/reproductlon apparatus 500 starts up the double layer write-once optical disc 1500.
Hereinafter, the startup procedure 4 according to Embodiment 4 of the present invention will be described step by step with reference to FIGS. 12 to 14. The startup procedure 4 of Embodiment 4 of the present invention is performed by for example, the CPU 514.
Step S1705; the CPU 514 controls the servo circuit 509 so that the optical head apparatus 540 is moved to a predetermined position on the first recording layer 1510, and performs a search for a recorded area. The details of this step are the same as that which has been described with reference to FIG. 12 and will not be explained.
Step S1711: the CPU 514 transmits an instruction for the servo circuit S09 to perform tilt adjustment. The servo circuit 509 changes a tilt state of the lens 503 by controlling the actuator 504, and also measures a jitter value based on the servo error signal 524 received from the preamplifier 508. The servo circuit 509 repeats the operation to search for a tilt setting which minimizes a jitter value and sets such a tilt setting for the first recording layer 1510 therewithin.
Step S1722: the CPU 514 transmits an instruction for the servo circuit 509 to perform focus position adjustment. The servo circuit 509 controls the actuator 504 to change a focus position and also measures a jitter value based on the servo error signal 524 received from the preamplifier 508. The servo circuit 509 repeats the operation to search for a focus position which minimizes the jitter value and sets the focus position to an internal focus offset for the second recording layer 1520. In this case, when it is determined in step S1718 that a recorded area is present, the area for measurement of jitter is the recorded area found within the second recording layer 1520. When it is determined in step S1718 that no recorded area is present, the recorded area for reproduction adjustment created in the second layer OPC area 1521 in step S11721 is used.
As described with reference to FIG. 14, when the startup process has been performed by executing steps S1712 to S1714 or steps S1724 to 51726, at least one control data area (the first layer second control data area 1603 or the second layer second control data area 1633) is changed into at least one recorded area. Therefore, when an optical disc in which all user data areas are unrecorded areas is loaded, at least one area of the user data areas is changed into a recorded area after the startup process. In other words, when at least one user data area is a recorded area, at least one control data area is at least is at least one recorded area.
Step S1710 and step S1711 provide a first layer reproduction adjustment step of adjusting a control parameter required for reproduction of a first recording layer. Step S1722 and step S1723 provide a second layer reproduction adjustment step of adjusting a control parameter required for reproduction of a second recording layer. Servo control parameters, such as a focus position and a tilt, have been described above. However, reproduction parameters are not limited to these. Other examples of servo control parameter adjustment may include adjustment of a beam expander for correcting spherical aberration, adjustment of an offset of a servo circuit, adjustment of an offset of stray light, and adjustment of a gain of a servo signal. For example, a slice level may be adjusted when an analog signal is converted to a digital (binary) signal, or an attenuator value may be adjusted to optimize an amplification rate of a reproduction signal. In other words, a signal processing system adjustment may be performed. For example, an offset of a laser circuit maybe adjusted, or a gain of a laser-system control loop may be adjusted. In other words, laser system adjustment may be performed. Further, the number of reproduction parameters to be adjusted is not limited to two. One or more reproduction parameters may be adjusted.
Step S1705 and step S1706 provide a first layer recorded area search step of determining whether or not a recorded area is present in the first recording layer 1510. Step S1717 and step S1718 provide a second layer recorded area search step of determining whether or not a recorded area to present in the second recording layer 1520.
Step. S1709 provides a first layer reproduction adjustment area creating step of creating a recorded area for adjusting a reproduction control parameter for a first recording layer when no recorded area is present in the first recording layer 1510. Step S1721 provides a second layer reproduction adjustment area creating step of creating a recorded area for adjusting a reproduction control parameter for a second recording layer when no recorded area is present in the second recording layer 1520.
Hereinafter, the physical formatting procedure for a double layer optical disc will be described step by step with reference to FIGS. 11 and 15. The physical formatting procedure to performed by the CPU 514.
When double layer optical disc is the double layer write-once optical disc 1500, an area to be formatted may contain at least one of the first layer management information temporary accumulation area 1517 and a first control data area to a fourth control data area contained in a first layer first INFO area to a first layer third INFO area (the area 1514, the area 1512, the area 1516), and at least one of the second layer management information temporary accumulation area 1527 and a first control data area to a fourth control data area contained in a second layer first INFO area to a second layer third INFO area (the area 1524, the area 1522, the area 1526) (FIG. 13).
Although certain preferred embodiments have been described herein, it is not intended that such embodiments be construed as limitations on the scope of the invention except as set forth in the appended claims. Various other modifications and equivalents will be apparent to and can be readily made by those skilled in the art, after reading the description herein, without departing from the scope and spirit of this invention. All patents, published patent applications and publications cited herein are incorporated by reference,as if set forth fully herein.
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
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.
US10968723 2003-10-20 2004-10-19 Control apparatus, control method, access apparatus, access method, program, and write-once recording medium Active 2027-08-04 US7916588B2 (en)
JP2003-358668 2003-10-20
JP2004-058281 2004-03-02
US12351238 US8189438B2 (en) 2003-10-20 2009-01-09 Control apparatus, control method, access apparatus, access method, program and write-once recording medium
US12351238 Continuation US8189438B2 (en) 2003-10-20 2009-01-09 Control apparatus, control method, access apparatus, access method, program and write-once recording medium
US20050111281A1 true US20050111281A1 (en) 2005-05-26
US7916588B2 true US7916588B2 (en) 2011-03-29
US10968723 Active 2027-08-04 US7916588B2 (en) 2003-10-20 2004-10-19 Control apparatus, control method, access apparatus, access method, program, and write-once recording medium
US12351238 Active 2025-05-08 US8189438B2 (en) 2003-10-20 2009-01-09 Control apparatus, control method, access apparatus, access method, program and write-once recording medium
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English translation of Chinese Office Action for corresponding Application No. 200480024712.1 dated Nov. 7, 2008.
Japanese office action for corresponding application No. 2004-304572 issued Jun. 30, 2009.
Japanese office action for corresponding application No. 2004-304572 issued Mar. 19, 2009.
Machine translation of JP publication No. 2001184675 by Ichikawa Norimoto in Jul. 6, 2001. *
Machine Translation of JP publication No. 2001184678 on Jul. 6, 2001 by Tokujiyuku Nobuhiro. *
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