WO2002071397A1 - Procede d'etalonnage de puissance optique pour etalonner la puissance optique d'ecriture d'un lecteur de disque optique - Google Patents

Procede d'etalonnage de puissance optique pour etalonner la puissance optique d'ecriture d'un lecteur de disque optique Download PDF

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Publication number
WO2002071397A1
WO2002071397A1 PCT/CN2002/000011 CN0200011W WO02071397A1 WO 2002071397 A1 WO2002071397 A1 WO 2002071397A1 CN 0200011 W CN0200011 W CN 0200011W WO 02071397 A1 WO02071397 A1 WO 02071397A1
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WO
WIPO (PCT)
Prior art keywords
area
power correction
optical
data
optical disc
Prior art date
Application number
PCT/CN2002/000011
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English (en)
French (fr)
Inventor
Wai Wang
Mengshin Yen
Tsotsai Chen
Original Assignee
Benq Corporation
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Filing date
Publication date
Priority claimed from CNB011109491A external-priority patent/CN1194340C/zh
Priority claimed from CNB011109505A external-priority patent/CN1180406C/zh
Application filed by Benq Corporation filed Critical Benq Corporation
Priority to EP02715363A priority Critical patent/EP1367568B1/en
Priority to DK02715363T priority patent/DK1367568T3/da
Priority to DE60215778T priority patent/DE60215778T2/de
Publication of WO2002071397A1 publication Critical patent/WO2002071397A1/zh

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    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/125Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
    • G11B7/126Circuits, methods or arrangements for laser control or stabilisation
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/004Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/0045Recording
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/007Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track

Definitions

  • the present invention relates to a method for correcting optical power of an optical disc drive, an optical disc drive and an optical disc using the above method, and more particularly to an optical disc using an inner edge and an outer edge portion of the optical disc.
  • a CD-R / CD-RW drive has been widely used as a peripheral access device for a computer. Generally, this type of optical disc drive performs an optical power correction procedure before writing data to the optical disc (CD-R / CD-RW).
  • the optical power correction is to pre-write specific information in a optical power correction area (PCA) on the inner edge of the optical disc, and then read it back, thereby detecting the characteristics of the optical disc and determining the required writing optical power. In order to correctly write data to the disc.
  • PCA optical power correction area
  • FIG. 1 is a side view of a known optical disc 10.
  • the known optical disc 10 is disc-shaped and symmetrical to the central axis 11. The relevant specifications are defined in the Orange Book of the Compact Disc Recordable System Description Version 3.1 December 1998.
  • the optical disc 10 includes a central portion 12, a power correction area 14 located outside the central portion 12 for optical power correction, and a data storage area 16 located outside the power correction area 14 for users to write data. And the last possible termination area 18 located on the outer edge of the optical disc 10 for recording the data end information of the optical disc 10.
  • the optical disc drive 10 performs an optical power correction procedure in the power correction area 14 before performing a writing operation to determine an appropriate optical power parameter. That is, it is known that the optical disc drive 10 simulates the situation of the entire data storage area 16 by using the environment and vibration characteristics of the inner power correction area 14 to find an appropriate writing optical power.
  • the foregoing optical power correction method cannot accurately achieve the purpose of correction. Since the power correction area 14 is located on the inner edge of the optical disc 10, a considerable portion of the data storage area 16 is close to the outer edge of the optical disc 10. In addition, the environment and vibration characteristics of the inner and outer edges of the optical disc 10 are often quite similar Differences, so the known optical power correction method cannot accurately detect the most suitable write replacement page (Article 26 of the detailed rules) Input power, resulting in poor writing quality.
  • FIG. 2 shows a schematic structural diagram of the optical power correction area 14 of FIG.
  • the optical power correction area 14 includes a test area 20 for writing tests, and a count area 22 for counting the number of write tests.
  • the test area 20 and the count area 22 are each divided into 100 partitions 20a, 22a. Therefore, no matter the CD-R or CD-RW, only a maximum of 100 optical power corrections can be performed.
  • an object of the present invention is to provide a method for correcting optical power, which can control whether the access device selects the inner optical power correction area or the outer optical power correction area according to the data writing position.
  • the optical power correction makes the position of the data stored in the data storage area and the position of the optical power correction area maximally close, so as to obtain a more suitable writing optical power.
  • Another object of the present invention is to provide an optical disk drive.
  • the control device in the optical disk drive can control the access device to select whether to perform the operation in the inner optical power correction area or the outer optical power correction area according to the data writing position.
  • the optical power correction makes the position of the data stored in the data storage area and the position of the optical power correction area maximally close, so as to obtain a more suitable writing optical power.
  • an optical power calibration method for correcting a writing optical power of an optical disc drive.
  • the optical disc drive includes an access device for Data is written into the optical disc.
  • the optical disc includes a central part, an inner power calibration area (Inner Power Calibration Area) is located outside the central part, and a data storage area is located outside the inner edge power correction area for The user writes data, and an outer power calibration area is located outside the data storage area.
  • the method includes: providing a written data to control the access device to the Optical power correction is performed in the outer power correction area to determine a writing power, and according to the writing power, the access device is controlled to write the data to be written into the data storage area.
  • an optical disc drive for writing data to be written into an optical disc.
  • the optical disc includes a central part, an inner edge power correction area (Inner Power Calibration Area) is located outside the center, a data storage area is located outside the inner edge power correction area for writing data, and an outer power calibration area (Outer Power Calibration Area) is located in the data storage area.
  • the outer side includes: an access device for writing the data to be written into the data storage area, and a control device for controlling the access device to perform optical power correction in the outer power correction area ( optical power calibration) to determine a writing power, and write the data to be written into the data storage area according to the writing power.
  • an optical disc includes: a central part, an inner power calibration area (Inner Power Calibration Area) located outside the central part, and a data A storage area located outside the inner edge power correction area for a user to write data, and an outer edge power correction area (Outer Power Calibration Area) located outside the data storage area, where the outer edge power correction area It is used to perform optical power calibration to determine the writing power required to write data to the optical disc.
  • Inner Power Calibration Area Inner Power Calibration Area
  • Data A storage area located outside the inner edge power correction area for a user to write data
  • an outer edge power correction area located outside the data storage area, where the outer edge power correction area It is used to perform optical power calibration to determine the writing power required to write data to the optical disc.
  • the data storage area includes an inner area and an outer area, and when the write position is located in the inner area, the control device controls the access device.
  • the inner edge power correction area performs optical power correction.
  • the control device controls the access device to perform optical power correction in the outer edge power correction area.
  • certain specific areas on the data storage area are set as a predetermined area, and a write position of the data in the data storage area is determined, where when the write When the location is in the predetermined area, the access device is controlled to perform optical power correction in the outer power correction area, and the required writing power is determined according to the result of the optical power correction, and the access device is controlled to store the data Written on this disc.
  • the predetermined area is set to the data storage area from a predetermined position in the data storage area to the outer edge power correction interval; and optical power is performed in the method.
  • the correction step further includes: when the writing position is in the predetermined area When outside, the access device is controlled to perform optical power correction in the inner edge power correction area.
  • the optical power correction method counts the number of times the optical power correction is performed.
  • the control device controls the The access device performs optical power correction in the inner edge power correction area, and when the number of times that the optical power correction is performed exceeds the predetermined number, the control device controls the access device to perform optical power in the outer edge power correction area. Power correction.
  • the inner and outer edge power correction areas of the optical disc respectively include a test area for performing a writing optical power test, and a count area ( Count Area) is used to count the number of write tests.
  • FIG. 1 is a side view showing a prior art optical disk
  • FIG. 2 is a schematic diagram showing the structure of a conventional optical power correction area shown in FIG. 1;
  • FIG. 3 is a schematic diagram showing an optical disc drive and an optical disc structure of the present invention;
  • FIG. 4 is a schematic diagram showing a control mode of an embodiment of the optical disc drive of the present invention shown in FIG. 3;
  • FIG. 5 is a flowchart showing an optical power correction method according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram showing a control mode of another embodiment of the optical disc drive according to the present invention.
  • FIG. ⁇ is a flowchart showing the optical power correction method according to the embodiment of the present invention shown in FIG. 6;
  • FIG. 8 is a schematic diagram showing the optical power correction and counting performed by the optical disc drive of the present invention shown in FIG. 3 in the last possible termination zone ;
  • FIG. 9 shows a flowchart of the optical power correction and counting method according to the present invention shown in FIG. 8.
  • 3 is a schematic diagram of an optical disc drive 30 according to the present invention.
  • the optical disc drive 30 includes an access device 32 for writing data into the optical disc 34, and a control device 36 for controlling operations of the optical disc drive 30.
  • the control device 36 controls the access device 32 to perform optical power correction, and writes data to the optical disc 34 according to a result of the correction.
  • the optical disc 34 includes, in order from the center to the outer edge, a central portion 38, an inner edge power correction area 40 for performing optical power correction, and a data storage for a user to write data to be stored Area 46, and the last possible termination area 48 for recording information on the end of the data of the optical disc.
  • an appropriate length must be reserved at the outermost portion of all optical discs to record the end-of-data information.
  • This area is the last possible termination area 48 of the optical disc.
  • the inner edge power correction area 40 can provide 100 power corrections
  • the last possible termination area 48 includes the outer edge power correction area 52, which is also used for power correction.
  • the length of the last possible termination zone 48 is at least greater than 1 minute and 30 seconds (01:30:00), and some manufacturers ’discs may finally terminate the zone 48 and even reach 1 minute and 50 seconds (01: 50:00), in general, each optical power correction takes 15 image frames, so 100 write power corrections require 1500 images, which is equivalent to 20 seconds (00:20:00), so As long as a sufficient length is reserved in the last possible termination area 48 for recording data termination information, the outer edge power correction area 52 may be set for power correction. In this embodiment, the outer edge power correction area 52 is set at 1 minute (1:00:00) to 1 minute 20 seconds (01:20:00) after the last possible start time 50.
  • the inner edge power correction area 40 and the outer edge power correction area 52 of this embodiment are each provided with a corresponding test area and a count area, which are respectively used to perform a write test and count the number of write tests.
  • FIG. 4 is a schematic diagram of a control manner of the optical disc drive 30 of FIG.
  • the optical disc drive 30 controls the rotation of the optical disc 34 in a fixed tangential velocity (CLV) manner.
  • the control method of the fixed linear speed controls the rotation speed of the optical disc 34 so that the tangent speeds of the data units at different positions on the track of the optical disc 34 through the access device 32 are the same.
  • the rotation speed ie, angular velocity
  • the rotational speed of the optical disk 34 will be faster, while When the data unit is being written, the rotation speed of the optical disc 34 is slower.
  • the optical disc drive 30 may select a region corresponding to the inner edge optical power correction according to the data writing position.
  • FIG. 5 is a flowchart of an optical power correction method according to this embodiment. The optical power correction method in this embodiment is performed according to the following steps:
  • Step 100 divide the data storage area 46 into an inner area 46a and an outer area 46b;
  • Step 102 Provide data to be written
  • Step 104 Determine a writing position of the data in the data storage area 46.
  • Step 106 According to the writing position, control the access device 32 to perform optical power correction in the inner edge or outer edge optical power correction areas 40, 52.
  • the writing position When the writing position is located in the inner area 46a, use the inner edge power correction.
  • the area 40 performs optical power correction.
  • the outer edge power correction area 52 is used for optical power correction.
  • Step 108 Determine the write optical power to be used according to the result of the optical power correction, and control the access device 32 to write the data into the optical disc 34.
  • the power correction method of the present invention can more accurately predict the write power that should actually be in the data storage area 46 and improve the write quality.
  • the above embodiment is described by taking the control method of the fixed tangential speed as an example.
  • the method described in the present invention can also be applied to the data storage area 46. It is divided into an inner region 46a and an outer region 46b, and power correction is performed with different power correction regions 40 and 52, respectively, to obtain a more correct correction result.
  • FIG. 6 is a schematic diagram of another embodiment of the present invention.
  • the optical disc drive 30 does not adopt a control method with a fixed tangential speed or a fixed angular velocity, but controls the rotation of the optical disc 34 with a multi-segment tangential speed.
  • this control method is to divide the data storage area 46 of the optical disc 34 into five data sectors, Z 2 , Z 3 , Z 4 , and Z 5 from the inside out.
  • the data sectors Zp Z 2 , Z 3 , Z 4 , and Z 5 control the rotation of the optical disc 34 in a fixed tangent speed, and each data sector
  • Z 2, Z 3, Z 4 , Z 5 are different tangential speed, respectively, VV 2, V 3, V 4 , V 5, and each data segment, Z 2, Z 3, Z 4 , Z 5
  • the initial angular velocity is about the same, about W. .
  • the control device 36 determines whether to use the inner edge or the outer edge according to the data section Z 2 , Z 3 , Z 4 , Z 5 where a write position of the data to be written is located in the data storage area 46.
  • Edge power correction areas 40, 52 When the writing position is located in the inner three data sectors Zi, Z 2 and Z 3 , the optical disc drive 30 will use the inner edge power correction area 40 to perform optical power correction. When the writing position is located For the other two data sectors Z 4 and Z 5 , the optical disc drive 30 will use the outer optical power correction area 52 to perform optical power correction.
  • FIG. 7 is a flowchart of an optical power correction method in the embodiment of FIG. 6.
  • the power correction method described in the embodiment of Figure 6 can be performed as follows:
  • Step 200 Predetermine N data segments ⁇ to ⁇ for multi-segment tangential speed control; Step 202: provide data to be written;
  • Step 204 Determine a writing position of the data in the data storage area 46.
  • Step 206 According to the writing position, control the access device 32 to perform optical power correction in the inner or outer edge power correction areas 40, 52.
  • the writing position is located in the inner M (M ⁇ N) data area
  • the inner edge power correction area is used for optical power correction
  • the outer edge power correction area 52 is used for optical power correction;
  • Step 208 Determine the write optical power to be used according to the result of the optical power correction, and control the access device 32 to write the data into the optical disc 34.
  • the value of M can be about half of N.
  • the values of N and M can also be selected by the designer according to relevant factors. As long as the appropriate power correction area is selected according to the writing position, it is in line with the spirit of the present invention.
  • the optical power correction method of the present invention selects one of the inner and outer edge optical power correction areas 40 and 52 for optical power correction according to the writing position of the data, so it can predict more accurately.
  • the actual writing optical power in the data storage area 46 improves the writing quality.
  • the present invention not only one of the inner or outer optical power correction areas 40, 52 can be selected for optical power correction based on the data writing position, and the actual written optical power in the data storage area 46 can be more accurately predicted.
  • the present invention is superior to the prior art in that the present invention not only performs optical power correction using a part of the inner and outer edge optical power correction areas 40, 52, but also uses the inner and outer edge optical power correction areas 40, The number of counted write tests in the other part of 52.
  • FIG. 8 is a schematic diagram of optical power correction performed by the optical disc drive 30 of FIG. 3 in the last possible termination area 48.
  • the conventional optical disc drive can only perform optical power correction in the inner edge power correction area 40.
  • the optical disc drive 30 may also perform optical power correction in the last possible termination area 48 on the outer edge of the optical disc 34.
  • the present invention additionally defines an outer edge power correction area 52 in the last possible termination area 48 for power correction.
  • the optical disk 34 contains the last possible termination area 48.
  • FIG. 8 is a schematic diagram of optical power correction performed by the optical disc drive 30 of FIG. 3 in the last possible termination area 48.
  • the last possible termination area 48 includes an outer edge power correction area 52, and the outer edge power correction area 52 includes a correction area or a test area 54 for writing correction or test, and a count area 56 To count the number of write corrections or tests.
  • the test area 54 and the count area 56 are each divided into 100 sections 54a, 56a, but the actual application is not limited to this.
  • how to use the test area 54 and the count area 56 to perform optical power correction is well known to those skilled in the art, and details are not described herein.
  • the last possible termination area 48 of the optical disc 34 is at least 1 minute and 30 seconds (01:30:00), and the final possible termination area of some optical discs provided by some manufacturers is even as long as 1 minute and 50 seconds (01:50:00) ), Much higher than 20 seconds, so as long as enough length is reserved in the last possible termination area 48 for recording data termination information, other parts can be used for writing power correction. As shown in FIG.
  • the start 58 of the outer edge power correction area 52 and the start of the last possible end area 48 are set to have a predetermined length 66. Setting the predetermined length 66 to 1 minute (01:00:00) is sufficient for recording data end information.
  • the length of the subsequent outer edge power correction area 52 is 20 seconds, which is sufficient for 100 write power corrections.
  • FIG. 9 is a flowchart of a power correction and counting method according to the present invention.
  • the power correction method of the present invention can be performed according to the following steps:
  • Step 300 Provide data to be written
  • Step 302 Determine the number of times that the optical disc 34 has performed optical power correction
  • Step 304 When the number of executions does not exceed 100 times, the control access device 32 performs optical power correction in the inner edge power correction area 40 of FIG. 3, and when the number of executions exceeds 100 times, it performs the optical power correction in the outer edge power correction area 52.
  • Optical power correction is performed in the inner edge power correction area 40 of FIG. 3, and when the number of executions exceeds 100 times, it performs the optical power correction in the outer edge power correction area 52.
  • Step 306 Determine the required writing power according to the result of the optical power correction, and control the access device 32 to write the data into the optical disc 34.
  • the above steps are to perform optical power correction in the inner edge power correction area 40 and then in the outer edge power correction area 52.
  • the order of implementing the optical power correction may be reversed, or any inner edge or outer Edge power correction areas 40, 52 are performed.
  • the length of the aforementioned outer edge power correction area 52 and its relative position to the last possible termination area 48 are only examples, in fact, as long as the setting position of the outer edge power correction area 52 does not hinder the last possible termination area 48 record data
  • the functions of the termination information can all achieve the effects described in the present invention to a considerable extent.
  • the optical power correction method of the present invention performs optical power correction in addition to the conventional inner edge power correction area 40, and also in the outer edge power correction area 52, so the power correction can be performed more than the conventional power correction method.
  • the number of times can meet the diverse needs of users when recording and writing optical discs.

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  • Optics & Photonics (AREA)
  • Optical Recording Or Reproduction (AREA)
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Description

光功率校正方法、
光盘机和光盘片 技术领域 本发明涉及一种用于光盘机的光功率校正的方法、 使用上述方法的光 盘机和光盘片, 特别涉及一种使用光盘.片的内缘和外缘部分进行光功率校 正的光功率校正方法及使用上述方法的光盘机和光盘片 。 背景技术 可读写式光盘机 (CD-R/CD-RW drive)已被广泛地使用于计算机的外围 存取设备。 一般, 这种类型光盘机在将数据写入光盘片(CD-R/CD-RW)前, 要先执行光功率校正程序。 光功率校正是在光盘片内缘的一个光功率校正 区 (PCA)先预写入特定的信息, 然后再将它读回, 由此检測该光盘片的特性, 确定所需的写入光功率, 以期能正确地将数据写入光盘片 。
参照囹 1。 图 1为公知光盘片 10的侧视图。 公知光盘片 10呈圆盘状, 且对称于中心轴 11, 其相关规格定义在光盘行业规范(Compact Disc Recordable System Description Version 3.1 December 1998)橘皮书中。概括而 言, 光盘片 10 包含中心部分 12、位于中心部分 12的外侧用来进行光功率 校正的功率校正区 14、 位于功率校正区 14的外侧用来供使用者写入数据的 数据存储区 16、 以及位于光盘片 10的外缘用来记录光盘片 10数据结束信 息的最后可能终止区 18。 公知光盘机 10在进行写入工作之前, 先在功率校 正区 14 内进行光功率校正程序, 以确定适当的光功率参数。也就是说, 公 知光盘机 10是以该内缘功率校正区 14所处的环境以及振态特性等, 来模 拟全部数据存储区 16的情形, 以找出适当的写入光功率。
然而, 上述的光功率校正方式并不能够精准的达到校正的目的。 由于 功率校正区 14是位于光盘片 10的内缘, 数据存储区 16有相当的部分接近 光盘片 10的外缘, 另外光盘片 10 内缘和外緣的所处环境以及振态特性常 有相当的差异, 因此公知的光功率校正方法并不能准确的检测最合适的写 替换页(细则第 26条) 入功率, 导致写入质量不良。
另外参照图 2, 图 2表示图 1光功率校正区 14的结构示意图。光功率 校正区 14包含测试区 20用来进行写入测试, 以及计次区 22用来计次写入 测试的次数。根据上述橘皮书的规范,测试区 20以及计次区 22各区分成 100 个区间 (partitions)20a、 22a。 因此不论 CD-R或 CD-RW, 最多只能进行 100 次光功率校正。
然而, 由于每进行一次新的写入操作, 就必须进行一次以上的光功率 校正, 因此上述橘皮书所规定功率校正区 14的规范并不能完全满足使用者 的需求。在可写一次的光盘片(CD-R)中, 这种规范限制了小笔数据多次写 入的情况, 而在可重复录写的光盘片(CD-RW)中, 其更限制了使用者重复 写入的次数。 发明内容 因此, 本发明的一个目的是提供一种光功率校正方法, 该方法可以根 据数据的写入位置, 控制该存取装置选择在内缘光功率校正区还是在外缘 光功率校正区内进行光功率校正, 使数据存储区中存储数据的位置与光功 率校正区的位置最大限度地接近, 从而获得更适合的写入光功率。
本发明的另一个目的是提供一种光盘机, 该光盘机中的控制装置可以 根据数据的写入位置, 控制该存取装置选择在内缘光功率校正区还是在外 缘光功率校正区内进行光功率校正, 使数据存储区中存储数据的位置与光 功率校正区的位置最大限度地接近, 从而获得更适合的写入光功率。
本发明的再另一个目的是提供一种具有内缘和外缘功率校正区的光盘 片。
为了实现上述目的, 按照本发明的第一个方面, 提供一种光功率校正 方法 (optical power calibration method) 用来校正光盘机的写入光功率, 该 光盘机包含有一个存取装置用来将数据写入光盘片, 该光盘片包含有一个 中心部位, 一个内缘功率校正区 (Inner Power Calibration Area)位于该中心部 位的外側, 一个数据存储区位于该内缘功率校正区的外側用来供使用者写 入数据, 以及一个外缘功率校正区 (Outer Power Calibration Area)位于该数据 存储区的外側, 该方法包含: 提供一个写入的数据, 控制该存取装置于该 外缘功率校正区内进行光功率校正, 以决定一个写入功率, 以及依据该写 入功率, 控制该存取装置将该欲写入数据写入该数据存储区。
为了实现上述目的, 按照本发明的第二个方面, 提供一种光盘机, 用 来将欲写入数据写入一个光盘片, 该光盘片包含有一个中心部位, 一个内 缘功率校正区(Inner Power Calibration Area)位于该中心部位的外側, 一个数 据存储区位于该内缘功率校正区的外侧用来供写入数据, 以及一个外缘功 率校正区(Outer Power Calibration Area)位于该数据存储区的外侧, 其包含: 一个存取装置, 可用来将该欲写入数据写入该数据存储区, 以及一个控制 装置, 用来控制该存取装置于该外缘功率校正区内进行光功率校正 (optical power calibration)以决定一个写入功率, 并依据该写入功率将该欲写入数据 写入该数据存储区。
为了实现上述目的, 按照本发明的第三个方面, 提供一种光盘片, 该 光盘片包含: 一个中心部位, 一个内缘功率校正区(Inner Power Calibration Area)位于该中心部位的外侧, 一个数据存储区, 位于该内缘功率校正区的 外侧用来供使用者写入数据, 以及一个外缘功率校正区(Outer Power Calibration Area) , 位于该数据存储区的外侧, 其中该外缘功率校正区是用 来进行光功率校正 (optical power calibration), 以决定欲将数据写入该光盘片 所需使用的写入功率。
为了实现上述目的, 按照本发明的第四个方面, 该数据存储区包含有 一个内侧区以及一个外侧区, 当该写入位置位于该内侧区时, 该控制装置 会控制.该存取裝置于该内缘功率校正区进行光功率校正, 当该写入位置位 于该外側区时, 该控制装置则会控制该存取装置于该外缘功率校正区进行 光功率校正。
为了实现上述目的, 按照本发明的第五个方面, 设定该数据存储区上 的某些特定区域为一个预定区, 确定该数据于该数据存储区的一个写入位 置, 其中当该写入位置位于该预定区内时, 控制该存取装置于该外缘功率 校正区进行光功率校正, 以及依据光功率校正的结果, 决定所需的写入功 率, 并控制该存取装置将该数据写入于该光盘片 。
为了实现上述目的, 按照本发明的第六个方面, 设定该预定区是为该 数据存储区中的一个预定位置至该外缘功率校正区间的该数据存储区; 而 该方法中进行光功率校正的步骤则另包含有: 当该写入位置位于该预定区 之外时, 控制该存取裝置于该内缘功率校正区进行光功率校正。
为了实现上述目的, 按照本发明的第七个方面, 该光功率校正方法对 光功率校正的执行次数进行计次, 当光功率校正的执行次数未超过一个预 定次数时, 该控制装置会控制该存取裝置于该内缘功率校正区内进行光功 率校正, 而当该光功率校正的执行次数超过该预定次数时, 该控制裝置会 控制该存取装置于该外缘功率校正区内进行光功率校正。
为了实现上述目的, 按照本发明的第八个方面, 该光盘片的内缘和外 缘功率校正区分别包含一个测试区 (Test Area)用来进行写入光功率测试, 以 及一个计次区 (Count Area)用来计算写入测试的次数。 附图说明 为使本发明的目的, 特征及优点更加明确, 现结合附图对本发明的实 施例进行详细的描述。 其中各个附图如下:
图 1是表示现有技术光盘片的侧视图;
图 2是表示图 1所示的现有技术的光功率校正区的结构示意图; 图 3是表示本发明的光盘机及光盘结抅的示意图;
图 4是表示图 3所示本发明光盘机的一个实施例的控制方式示意图; 图 5是表示本发明的一个实施例光功率校正方法的流程图;
图 6是表示本发明的光盘机另一实施例的控制方式示意图;
图 Ί是表示图 6所示本发明的实施例的光功率校正方法的流程图; 图 8 是表示图 3 所示本发明的光盘机在最后可能终止区内进行光功率 校正及计次的示意图;
图 9表示如图 8所示本发明的光功率校正及计次的方法的流程图。 具体实施例方式 参照图 3 , 图 3为本发明光盘机 30的示意图。光盘机 30 包括存取装 置 32, 用于将数据写入光盘片 34 , 以及控制装置 36用来控制光盘机 30的 操作。 控制装置 36控制存取装置 32进行光功率校正, 并根据校正的结果 将数据写入光盘片 34。 如图 3所示, 光盘片 34 由中心到外缘依序包括: 中心部分 38, 用于 进行光功率校正的内缘功率校正区 40, 用于供使用者写入欲存储的数据的 数据存储区 46, 以及用于纪录该光盘片数据结束的信息的最后可能终止区 48。 根据上述橘皮书的规定, 在所有光盘片最外缘的部分都必须保留适当 的长度以纪录数据结束信息, 该区域即为光盘片的最后可能终止区 48。在 本发明中, 内缘功率校正区 40可提供 100次功率校正, 而最后可能终止区 48包含外缘功率校正区 52, 也用于功率校正。
根据上述橘皮书的规定, 最后可能终止区 48 的长度至少大于 1 分 30 秒 (01 :30:00), 有些制造商提供的光盘片最后可能终止区 48 甚至达 1 分 50 秒 (01 :50:00), 一般而言, 每进行一次光功率校正需耗用 15个图像帧, 因此 100次写入功率校正就需要 1500个图像桢, 相当于 20秒 (00:20:00), 所以 只要在最后可能终止区 48 中保留足够的长度以供纪录数据终止信息, 其它 部分即可设置外缘功率校正区 52 以供功率校正之用。在本实施例中, 外缘 功率校正区 52设置在最后可能起始时间 50后的 1分 (1:00:00)至 1分 20秒 (01 :20:00)处。 另外, 本实施例的内缘功率校正区 40 与外缘功率校正区 52 各设置有相对应的测试区以及计次区, 分别用来进行写入测试以及计算写 入测试的次数。
参照图 4 , 图 4为图 3光盘机 30的控制方式示意图。 在本实施例中, 光盘机 30是以固定切线速度 (CLV)的方式控制光盘片 34的旋转。 如图 4所 示, 固定线性速度的控制方法控制光盘片 34 的转速, 使得光盘片 34轨道 上不同位置的数据单元通过存取裝置 32的切线速度都相同。 此时就光盘片 34的转速(即角速度)而言, 在对接近光盘片 34中心、的数据单元进行写入时, 光盘片 34的转速会较快, 而在对接近光盘片 34外缘的数据单元进行写入 时, 光盘片 34的转速则会较慢。
光盘机 30可以根据数据的写入位置, 来选择对应于内缘光功率校正区
40, 还或是外缘功率校正区 52进行光功率校正。如图 4所示, 本实施例将 数据存储区 46分成内侧区 46a以及外側区 46b。 当欲写入数据时, 控制装 置 36确定该数据在数据存储区 46 内的写入位置。 当该写入位置位在内側 区 46a时, 光盘机 30将使用图 3所示的内缘功率校正区 40进行光功率校 正, 当该写入位置位在外侧区 46b时, 光盘机 30则将使用外缘光功率校正 区 52进行光功率校正。 参照图 5, 图 5 为本实施例光功率校正方法的流程图。本实施例的光 功率校正方法是按下列步骤进行:
步骤 100: 将数据存储区 46分成内侧区 46a以及外側区 46b;
步骤 102 : 提供欲写入的数据;
步骤 104 : 确定该数据在数据存储区 46内的写入位置;
步骤 106 : 根据该写入位置, 控制存取装置 32在内缘或外缘光功率校 正区 40、 52内进行光功率校正, 其中当该写入位置位于内侧区 46a时, 使 用内缘功率校正区 40进行光功率校正, 当该写入位置位于外侧区 46b时, 使用外缘功率校正区 52进行光功率校正。
步骤 108 : 根据光功率校正的结果, 确定所需使用的写入光功率, 并 控制存取装置 32将该数据写入光盘片 34。
按上述步骤, 由于内侧区 46a较接近内缘功率校正区 40, 而外侧区 46b 较接近外缘功率校正区 52, 故内側区 46a及外側区 46b的所处环境及振态 特性分别较接近内缘与外缘功率校正区 40、 52。 因此, 本发明的功率校正 方法可更精准的预测实际应于数据储存区 46内的写入功率,提高写入质量。
此外, 上述实施例是以固定切线速度的控制方式为例加以说明的, 然 而在使用固定角速度 (CAV)控制方式的光盘机中, 也可以同样应用本发明所 述的方式, 将数据存储区 46分成内侧区 46a 以及外侧区 46b, 并分别以不 同的功率校正区 40、 52来进行功率校正, 以求取更正确的校正结果。
参照图 6, 图 6 为本发明的另一实施例的示意图。 与前一个实施例不 同的是, 光盘机 30并不是采用固定切线速度或固定角速度的控制方式, 而 是以一种多段式切线速度的方式来控制光盘片 34的旋转。如图 6所示 此 种控制方式是将光盘片 34的数据存储区 46由内而外分成 5个数据区段 、 Z2、 Z3、 Z4、 Z5, 而光盘机 30是在每一数据区段 Zp Z2、 Z3、 Z4、 Z5中分 别以固定切线速度的方式控制光盘片 34的旋转, 且其中每一数据区段
Z2、 Z3、 Z4、 Z5的切线速度均不同, 分别为 V V2、 V3、 V4、 V5 , 而每一 个数据区段 、 Z2、 Z3、 Z4、 Z5的起始角速度则大致相同, 约为 W。。
在本实施例中, 控制装置 36根据欲写入的数据在数据存储区 46 内的 一个写入位置所在的数据区段 Z2、 Z3、 Z4、 Z5, 以确定使用内缘或外 缘功率校正区 40、 52。 当该写入位置位在内側 3个数据区段 Zi、 Z2、 Z3时, 光盘机 30将使用内缘功率校正区 40进行光功率校正, 当该写入位置位于 其它 2个数据区段 Z4、 Z5时, 光盘机 30则将使用外缘光功率校正区 52以 进行光功率校正。
参照图 7。 图 7为图 6实施例光功率校正方法的流程图。 图 6 实施例 所述的功率校正方法可按下列步骤进行 :·
步骤 200 : 预定 N个数据区段 ^至 乂供多段式切线速度控制之用; 步骤 202 : 提供欲写入的数据;
步骤 204 : 确定该数据在数据存储区 46内的写入位置;
步骤 206 : 根据该写入位置, 控制存取装置 32在内缘或外缘功率校正 区 40、 52 内进行光功率校正, 其中当该写入位置位在内側 M个 (M < N)数 据区段时, 使用该内缘功率校正区以进行光功率校正, 当该写入位置位在 其它 N-M个纪录区时, 使用外缘光功率校正区 52以进行光功率校正;
步骤 208 : 根据光功率校正的结果, 确定所需使用的写入光功率, 并 控制存取装置 32将该数据写入光盘片 34。
其中 M的值可为 N的一半左右, 当然, N与 M的值也可由设计者根 据相关因素自行选择, 只要是根据写入位置来选择适当的功率校正区, 均 符合本发明的精神。
与公知技术相比较, 本发明的光功率校正方法是在根据数据的写入位 置, 选择在内缘和外缘光功率校正区 40、 52 中之一进行光功率校正, 故可 更精准的预测实际在数据存储区 46内的写入光功率, 提高写入质量。
本发明不但可以根据数据的写入位置, 选择在内缘或外缘光功率校正 区 40、 52 中之一进行光功率校正, 更精准的预测实际在数据存储区 46 内 的写入光功率。 而且本发明优于现有技术之处还在于, 本发明不仅利用内、 外缘光功率校正区 40、 52的一部分区段进行光功率校正, 还可以利用内、 外缘光功率校正区 40、 52的另一部分区段进行计次写入測试的次数。
下面参照图 8说明在最后可能终止区的外缘光功率校正区 52区段进行 光功率校正和计次的情况。
图 8为图 3光盘机 30在最后可能终止区 48内进行光功率校正的示意 图。 如背景说明部分所述, 传统光盘机仅能在内缘功率校正区 40 内进行光 功率校正。 但在本发明中, 光盘机 30也可在光盘片 34外缘的最后可能终 止区 48 中进行光功率校正。如图 8所示, 本发明在最后可能终止区 48 中 另行定义一外缘功率校正区 52, 以供功率校正之用。 正如前面图 3所示, 光盘片 34包含最后可能终止区 48。 进一步如图 8 所示, 在最后可能终止区 48中包含外缘功率校正区 52, 外缘功率校正区 52 包含校正区或测试区 54 用来进行写入校正或测试, 以及计次区 56 用来计 算写入校正或測试的次数。在本实施例的中, 测试区 54 以及计次区 56各 分成 100 个区间 54a、 56a, 但实际应用不以此为限。 另外关于如何利用测 试区 54 以及计次区 56 来进行光功率校正, 为本领域技术人员所公知, 在 此不加赘述。
一般, 每进行一次光功率校正需耗用 15个图像帧, 因此 100次写入功 率校正就需要 1500个图像帧, 相当于 20秒 (00:20:00), 又根据上述橘皮书 的规范,光盘片 34的最后可能终止区 48的长度至少为 1分 30秒 (01 :30:00), 有些制造商提供的光盘片最后可能终止区甚至长达 1分 50秒 (01 :50:00), 远 高于 20秒, 因此只要在最后可能终止区 48 中保留足够的长度供记录数据 终止信息, 其它部分即可供写入功率校正之用。 如图 8所示, 本实施例的外 缘功率校正区 52的起始处 58与最后可能终止区 48的起始处 (即最后可能起 始时间 50)设置相距有一个预定长度 66。 该预定长度 66 设定为 1 分钟 (01 :00:00)足够供记录数据结束信息。 而其后的外缘功率校正区 52的长度则 为 20秒, 足供 100次写入功率校正。
参照图 9, 图 9 为本发明功率校正及计次方法的流程图。本发明的功 率校正方法可按下列步骤进行:
步骤 300 : 提供欲写入的数据;
步骤 302 : 判断光盘片 34已执行光功率校正的次数;
步骤 304 : 当执行次数未超过 100次时, 控制存取裝置 32在图 3的内 缘功率校正区 40内进行光功率校正, 而当执行次数超过 100次时, 在外缘 功率校正区 52内进行光功率校正;
步骤 306 : 根据光功率校正的结果, 确定所需使用的写入功率, 并控 制存取装置 32将该数据写入光盘片 34。
再者, 以上的步骤是先在内缘功率校正区 40内然后再在外缘功率校正 区 52 内进行光功率校正, 当然, 光功率校正实施的顺序亦可反置, 或任意 在内缘或外缘功率校正区 40、 52 内进行。 再有, 前述外缘功率校正区 52 的长度以及其与最后可能终止区 48的相对位置仅是一种示例, 事实上, 只 要外缘功率校正区 52 的设置位置不会妨碍到最后可能终止区 48记录数据 结束信息的功能, 均可相当程度地完成本发明所述的效果。
与公知技术相比较, 本发明的光功率校正方法是在传统内缘功率校正 区 40之外, 还另外在外缘功率校正区 52 进行光功率校正, 故比传统功率 校正方法所能进行的功率校正次数为多, 可满足使用者在录写光盘时多样 化的需求。
以上所述仅为本发明的优选实施例, 凡按照本发明权利要求书所限定 范围所做的等同变化与修饰, 均应属本发明专利的函盖范围之内。

Claims

权利要求
1.一种光功率校正方法 (optical power calibration method), 用来校正一 个光盘机的写入功率, 该光盘机包含有一个存取装置用来将数据写入光盘 片, 该光盘片 包含有一个中心部位, 一个内缘功率校正区(Inner Power Calibration Area)位于该中心部位的外侧, 一数据存储区位于该内缘功率校 正区的外侧用来供使用者写入数据, 以及一个外缘功率校正区 (Outer Power Calibration Area)位于该数据存储区的外侧, 该方法包含有:
提供写入的数据;
控制该存取裝置于该外缘功率校正区内进行光功率校正, 以决定一个 写入功率; 以及
依据该写入光功率, 控制该存取装置将该欲写入数据写入该数据存储 区。
2. 如杈利要求 1 的光功率校正方法, 其中该光盘片另包含一个最后可 能终止区 (Last possible Lead-out Area)位于该光盘片的外缘用来记录该光盘 片数据结束的信息, 而该外缘功率校正区则位于该最后可能终止区之内。
3. 如杈利要求 2 的光功率校正方法, 其中该外缘功率校正区的一起始 处与该最后可能终止区的一个起始处相距有一个预定长度。
4. 如杈利要求 1 的光功率校正方法, 其中该外缘功率校正区包含有一 个测试区 (Test Area)用来进行写入测试, 以及一个计次区(Count Area)用来 计算写入测试的次数。
5.如杈利要求 1的光功率校正方法, 其中该方法另包含有:
判断该光盘片已执行光功率校正的次数; 以及
当光功率校正的执行次数未超过一个预定次数时, 于该内缘功率校正 区内进行光功率校正, 而当该光功率校正的执行次数超过该预定次数时, 于该外缘功率校正区内进行光功率校正。
6. 如杈利要求 5 的光功率校正方法, 其中该预定次数是为可于该内缘 功率校正区内进行光功率校正的次数。
7. 如杈利要求 1的光功率校正方法, 其中另包含有:
设定该数据存储区上的某些特定区域为一个预定区;
确定该数据于该数据存储区的一个写入位置; 其中当该写入位置位于该预定区内时, 控制该存取装置于该外缘功率 校正区进行光功率校正; 以及
依据光功率校正的结果, 决定所需的写入功率, 并控制该存取装置将 该数据写入于该光盘片 。
8. 如杈利要求 7的光功率校正方法, 其中:
该预定区是为该数据存储区中的一个预定位置至该外缘功率校正区间 的该数据存储区;
而该方法中进行光功率校正的步骤则另包含有:
当该写入位置位于该预定区之外时, 控制该存取装置于该内缘功率校 正区进行光功率校正。
9. 如杈利要求 1的光功率校正方法, 其中该数据存储区包含有 N个数 据区段, 而该方法中进行光功率校正的步驟包含有:
当该写入位置位于内侧 M个 (M<N)数据区段时, 控制该存取裝置于该 内缘功率校正区进行光功率校正, 当该写入位置位于其它 N-M个数据区段 时, 控制该存取装置于该外缘功率校正区进行光功率校正。
10. —种光盘机, 用来将欲写入数据写入一个光盘片, 该光盘片包含 有—个中心部位, 一个内缘功率校正区 (inner Power Calibration Area)位于该 中心部位的外侧, 一个数据存储区位于该内缘功率校正区的外侧用来供写 入数据, 以及一个外缘功率校正区 (Outer Power Calibration Area)位于该数据 存储区的外侧, 其包含有:
一'个存取装置, 可用来将该欲写入数据写入该数据存储区; 以及 一个控制裝置, 用来控制该存取装置于该外缘功率校正区内进行光功 率校正 (optical power calibration)以决定一个写入功率, 并依据该写入功率将 该欲写入数据写入该数据存储区。
11. 如杈利要求 10 的光盘机, 其中该光盘片另包含一个最后可能终止 区 (Last possible Lead-out Area)位于该光盘片的外缘用来记录该光盘片数据 结束的信息, 而该外缘功率校正区则位于该最后可能终止区之内。
12. 如杈利要求 11 的光盘机, 其中该外缘功率校正区的起始处与该最 后可能终止区的起始处相距有一个预定长度。
13. 如杈利要求 10 的光盘机, 其中该外缘功率校正区包含有一个测试 区 (Test Area)用来进行写入测试, 以及一个计次区 (Count Area)用来计算写 入测试的次数。
14. 如杈利要求 10 的光盘机, 其中当光功率校正的执行次数未超过一 预定次数时, 该控制装置会控制该存取装置于该内缘功率校正区内进行光 功率校正, 而当该光功率校正的执行次数超过该预定次数时, 该控制装置 会控制该存取装置于该外缘功率校正区内进行光功率校正。
15. 如杈利要求 14 的光盘机, 其中该预定次数是可于该内缘功率校正 区进行光功率校正的次数。
16. 如杈利要求 10 的光盘机, 其中该数据存储区包含有一个内侧区以 及一个外側区, 当该写入位置位于该内側区时, 该控制装置会控制该存取 装置于该内缘功率校正区进行光功率校正, 当该写入位置位于该外侧区时, 该控制裝置则会控制该存取装置于该外缘功率校正区进行光功率校正。
17. 如杈利要求 10的光盘机,其中该数据存储区包含有 N个数据区段, 当该写入位置位于内側 M 个 (M<N)数据区段时, 该控制装置会控制该存取 装置于该内缘功率校正区进行光功率校正, 当该写入位置位于其它 N-M个 数据区段时, 该控制装置会控制该存取装置于该外缘功率校正区进行光功 率校正。
1 8. 一种光盘片, 其包含有:
一个中心部位;
一个内缘功率校正区(Inner Power Calibration Area)位于该中心部位的外 侧;
一个数据存储区, 位于该内缘功率校正区的外侧用来供使用者写入数 据, 以及
一个外缘功率校正区(Outer Power Calibration Area) , 位于该数据存储 区的夕卜侧;
其中该外缘功率校正区是用来进行光功率校正(optical power calibration) , 以决定欲将数据写入该光盘片所需使用的写入功率。
19. 如杈利要求 18 的光盘片, 其另包含一个最后可能终止区 (Last possible Lead-out Area)位于该光盘片的外缘用来记录该光盘片数据结束的信 息, 而该外缘功率校正区则位于该最后可能终止区之内。
20. 如杈利要求 19的光盘片, 其中该外缘功率校正区的起始处与该最 后可能终止区的起始处相距有一个预定长度。
21. 如杈利要求 20的光盘片, 其中该预定长度约为 1分钟 (01 :00:00)。
22. 如杈利要求 18 的光盘片, 其中该外缘功率校正区的长度约为 20 秒 (00:20:00)。
23. 如杈利要求 18 的光盘片, 其中该外缘功率校正区包含有一个测试 区 (Test Area)用来进行写入測试, 以及一个计次区 (Count Area)用来计算写 入测试的次数。
PCT/CN2002/000011 2001-03-07 2002-01-10 Procede d'etalonnage de puissance optique pour etalonner la puissance optique d'ecriture d'un lecteur de disque optique WO2002071397A1 (fr)

Priority Applications (3)

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EP02715363A EP1367568B1 (en) 2001-03-07 2002-01-10 An optical power calibration method for calibrating the writing optical power of optical disk drive
DK02715363T DK1367568T3 (da) 2001-03-07 2002-01-10 Optisk metode for kalibrering af den optiske skriveeffekt af et optisk diskdrev
DE60215778T DE60215778T2 (de) 2001-03-07 2002-01-10 Optisches leistungskalibrierverfahren zum kalibrieren der optischen schreibleistung eines optischen plattenlaufwerks

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CNB011109491A CN1194340C (zh) 2001-03-07 2001-03-07 光学功率校正方法及光盘机
CNB011109505A CN1180406C (zh) 2001-03-07 2001-03-07 光盘机的光学功率校正方法及光盘机和光盘片分区方法
CN01110950.5 2001-03-07
CN01110949.1 2001-03-07

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CN1853220B (zh) 2003-12-26 2010-11-10 松下电器产业株式会社 信息记录再现装置
JP2005216422A (ja) * 2004-01-30 2005-08-11 Sanyo Electric Co Ltd 光記録再生装置
CN112731315B (zh) * 2020-12-21 2023-02-03 四川九洲空管科技有限责任公司 一种大阵面数字阵雷达快速幅相校准系统及方法

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JPH10293961A (ja) * 1997-04-21 1998-11-04 Ricoh Co Ltd 光ディスク記録装置
JP2000099949A (ja) * 1998-09-24 2000-04-07 Ricoh Co Ltd 光ディスクシステム
JP2000235712A (ja) * 1999-02-15 2000-08-29 Kenwood Corp 記録用光線源のパワーキャリブレーション装置

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EP1367568A4 (en) 2005-10-26
DK1367568T3 (da) 2007-02-05
DE60215778T2 (de) 2007-09-06
EP1752975A1 (en) 2007-02-14
DE60215778D1 (de) 2006-12-14
ATE344521T1 (de) 2006-11-15

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