KR100565662B1 - How to get OPC from optical disc drive recorder - Google Patents

Abstract

The present invention relates to an optical disk drive recorder, and more particularly, to a method for obtaining an OPC in an optical disk drive recorder when manufacturing an optical disk drive recorder. As described above, the method for obtaining an OPC in the optical disc drive recorder according to the present invention comprises the steps of determining an optimal WS (Write Strategy) for a plurality of media having the same ATIP information and manufacturing a beta value in the manufacturing of the optical disc drive recorder. And performing an average power calibration (OPC) for a plurality of double speeds for each of the media according to the WS and beta values to obtain an average value of the recorded light quantity for each double speed, and driving the average recorded light quantity for each double speed. It consists of applying to the firmware.

       Optimal Power Calibration (OPC), Write Strategy (WS), Firmware

Description

Method for find to Optimal Power Calibration in Optical disc drive recording

1 is a view for explaining a method for obtaining an OPC in an optical disk drive recorder according to the present invention.

2 is a flowchart for obtaining an OPC in an optical disc drive recorder.

FIG. 3 is a view for explaining an OPC capable area for obtaining an OPC in the optical disc drive recorder according to FIG. 1. FIG.

4 is a diagram illustrating the definition of a beta value of an RF signal in an optical disc drive recorder according to FIG. 1.

5A to 5B show an example of a firmware driving system of an optical disk drive recorder obtained by obtaining an OPC according to FIG.

FIG. 6 is a diagram illustrating functions and shapes of the program tool of FIGS. 5A to 5B.

7 illustrates communication between an optical disk drive recorder and a program tool for obtaining an OPC according to the present invention.

The present invention relates to an optical disc drive recorder, and more particularly to a method of obtaining an OPC in an optical disc drive recorder.

There are about 600 types of CD-R media on the market today, and new media continue to emerge due to the speed competition of optical disc drive recorders.

In order to develop a recorder with good quality for so many types of media, it is essential to apply the optimal write strategy (WS) for each media.

As a method of applying the recording related information (WS) to a large number of media, the media are classified by using lead-in / lead-out information of Absolute Time In Pregroove (ATIP) information. In addition, it may be difficult to find an optimal amount of recording light when one record-related information WS is applied to each disc code having the same ATIP information.

In addition, the application method of recording related information (WS) on media in the optical disc drive recorder is currently responding to each media according to the subjective design viewpoint of the engineer. It requires a lot of manpower and time to respond to the multitude of media sold on the market.

In particular, it will require more manpower and time to cope with the higher speed of recorders and the recording of other next-generation high-capacity media (DVD-R / RW, + R / RW, DVD_RAM, etc.), and the product development time will increase considerably.

In addition, if the recorder's pick-up or driving firmware is changed and the light quantity characteristic of the recorder is changed, accurate scientific data to prove this is required, but data collection is impossible due to lack of time due to mass production schedule. Therefore, it is necessary to rely on the subjective design viewpoint of the engineer. Therefore, an inspection method to collect objective data on this is essential.

On the other hand, recording media such as CD-R / RW are produced by spraying an organic dye onto a thermoplastic resin called polycarbonate. Discs whose recording surface should be flat due to storage or manufacturing mistakes are deformed into an umbrella shape around the disk axis. Often occurs. When a certain amount of light is given by CLV recording method by using laser power value determined through OPC (Optimal Power Calibration) in the inner circumference of such a disk, the amount of light is insufficient in the outer circumference, which is connected to the recording quality of the RF signal and prevents reading specific data. do. Therefore, for these media, a relatively large amount of light is required, but the recording characteristics of other media having the same ATIP information should be considered. If too much light is given, the recording of other normal media may be wrong, resulting in poor recording quality.

As a result, there is a limit to automatically obtaining the optimal recording light amount because there is no limit to the tuning of recording related information (WS) for disc codes having a considerable number of combinations by speed and disc by the empirical and subjective design viewpoint of engineers. .

Accordingly, an object of the present invention has been made in view of the above-described problems of the prior art, and is an optical disc drive recorder that determines an optimal amount of recording light for various types of media having the same ATIP and different characteristics. It is to provide a method for obtaining OPC from a disk drive recorder.

Another object of the present invention is to obtain an OPC from an optical disc drive recorder with a simple algorithm without adding or modifying hardware, and when there is a device such as a CD changer, the optical disc drive recorder automatically finds the optimal amount of light for all media. To provide a way to obtain OPC from.

It is still another object of the present invention to provide a method for obtaining OPC in an optical disk drive recorder which reduces the tuning time for WS during product development, thereby reducing the response time for various types of media.

       According to an aspect of the present invention for achieving the above object, in the manufacture of an optical disc drive recorder, determining the optimal WS (Write Strategy) for a plurality of media having the same ATIP information and the beta value for this And performing an average power calibration (OPC) for a plurality of double speeds for each of the media according to the WS and beta values to obtain an average value of the recorded light quantity for each double speed, and driving the average recorded light quantity for each double speed. Applying to the firmware.

        Preferably, the OPC is performed in the CLV region of the media peripheral region.

       The application of the firmware may include inserting media into a drive, inputting a beta value or a maximum drive speed setting value input to a program tool from a drive by the PC, and inserting media into the drive. The pickup is performed by moving to an OPC-capable area and performing OPC for each speed based on the OPC average value to store and monitor the result.

        In addition, the program tool is a POWER WIZARD, the drive is connected to the PC and ATAPI communication and serial communication.

Hereinafter, a configuration and an operation according to an exemplary embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a view for explaining a method for obtaining an OPC in an optical disc drive recorder according to the present invention, and FIG. 2 is a flowchart for obtaining an OPC in an optical disc drive recorder.

Referring to FIG. 1, WS recording is performed on three types of media A, B, and C having the same Absolute Time In Pregroove (ATIP) with a lead in of 97:26:66 and a lead out of 79:59:74. When the automatic light quantity measurement method is applied, the optimal WS is determined for the media having the same ATIP information, the beta value is determined, and the OPC is performed for a plurality of times of 16 to 40 times the speed of each media.

Then, 30, 41, 51, and 61.5 mW, which are average values of recording light amounts, are obtained for each double speed.

Then, the average amount of recorded light is stored in the drive firmware.

2, the optical disk drive recorder checks whether the media has the same ATIP information, and then the host PC interfaced with the optical disk drive recorder reads the beta value and the maximum drive speed from the program tool (POWER WIZARD). (S11-S12)

Then, OPC is performed for each speed up to the maximum drive speed to find the average amount of recording light that meets the determined beta value (S13 ~ S21), and the average power of the recording light amount is estimated by linear interpolation of the power of the maximum speed of 48x. Save to (S22 ~ S23)

FIG. 3 is a view for explaining an OPC-capable area for obtaining an OPC in the optical disc drive recorder according to FIG. 1. For example, for a CD-R / RW drive capable of 48x CAV recording, 16x, 24x, 32x, 40x, 48x recording OPC needs to be made in the CLV region, so each OPC is performed from 16x to 40x in the 40x CLV region to find the amount of recording light that meets the specified beta value. The recording light quantity value is determined.

Since the recording light quantity at 48x is difficult to perform OPC, it is estimated by linear interpolation of the 32x and 40x recording light amounts, and the average values of the recording light amounts are determined to correspond to defective disks (disks having different characteristics of inner or outer circumferential media). For this reason, change the value of about 10 to 20 of the average value to the optimal amount of recording light.

FIG. 4 is a diagram illustrating a beta value definition of an RF signal in the optical disc drive recorder according to FIG. 1.

5A to 5B illustrate an example of a firmware driving system of an optical disk drive recorder obtained by OPC according to FIG. 1. FIG. 5A illustrates an optical disk recorder connected to a PC through ATAPI communication and serial communication. Operation is made and the recorder is controlled by the modified drive firmware to perform the OPC.

In serial communication, a program tool (eg, POWER WIZARD TOOL) is connected to the drive, and the setting value for OPC is input to the media, and the result value after OPC is performed is displayed and stored in the PC.

On the other hand, Figure 5b is a program tool POWER WIZARD TOOL is basically a program that is run by the Windows OS, so in order to be tested in other OS (DOS, UNIX), etc. are connected to two PCs.

6 is a diagram showing the function and shape of the program tool of FIGS. 5A to 5B. No. ① sets the maximum OPC speed, ② sets the OPC repetition frequency, ③ sets the exclusive value, ④ the OPC execution start button, and ⑤. No. is the end of program button, No. 6 outputs the result of recording light quantity by OPC. In order to use the program, OPC maximum speed is selected from No. ① for the media which classified the discs having one ATIP information.

When 31x is selected as the maximum OPC speed, OPC is performed for 16x, 24x, and 32x speeds.

Then, set beta value and OPC repeat count for media at ③ and ②, and press button ④ to perform OPC for each double speed, and display the result in No. ⑥ and press button ⑤. Press to exit and save the results as a document.

FIG. 7 is a diagram showing communication between an optical disk drive recorder and a program tool for obtaining an OPC according to the present invention. Since performing the OPC at each speed of the disk is outside the standard of CD-R media recording. Independent test block is made by modifying in firmware, and it is also communicated with POWER WIZARD TOOL based on Windows OS to save and organize the OPC result of the drive. (A) shows the communication command between drive recorder and POWER WIZARD TOOL. These are commands for controlling the drive recorder on the PC.They perform the OPC or set the drive status before the operation. (B) shows the flags or OPC results from the drive to the PC after the OPC is performed. Command to pass.

In the case of using the ATAPI communication command, intercommunication can be implemented simply by producing software that enables modification of firmware and ATAPI communication without adding hardware.

As described above, the present invention shortens the development period and manpower of the optical disc drive recorder, creates scientific and numerical data on various media, and makes it easy to modify WS as soon as the pickup or firmware of the optical drive is changed. It works.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the present invention.

Therefore, the technical scope of the present invention should not be limited to the contents described in the examples, but should be defined by the claims.

Claims (5)

        In manufacturing an optical disk drive recorder,         Determining an optimal WS (Write Strategy) for a plurality of media having the same Absolute Time In Pregroove (ATIP) information and determining a beta value thereof;         Performing an average power calibration (OPC) for a plurality of double speeds for each of the media according to the WS (Write Strategy) and the beta value to obtain an average value of the recorded light quantity for each double speed; And,         And applying an average value of the recording light amounts for each of the double speeds to the driving firmware. The method of claim 1, The OPC (Optimum Power Calibration) is performed in the constant linear velocity (CLV) region of the media peripheral area to obtain the OPC in the optical disk drive recorder.         The method of claim 1,         Application to the firmware         Inserting media into the drive;        Receiving, by the PC, a beta value or a maximum drive speed setting value input to the program tool after the insertion;      The pickup of the drive moves to an area where OPC (Optimum Power Calibration) is possible based on the input value, and stores and monitors the result value by performing OPC (Optimum Power Calibration) for each speed based on the OPC (Optimum Power Calibration) average value. And obtaining an OPC from the optical disc drive recorder.         The method of claim 3, wherein         And said program tool is POWER WIZARD.         The method of claim 3, wherein         And the drive is connected to a PC via ATAPI communication and serial communication.

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