KR20000010472A - Optical disk capable of discriminating original copy and fabricating method of the same - Google Patents

Abstract

PURPOSE: An optical disk is provided to easily discriminate an original copy by fabricating an original optical disk and recording data in a region beyond standard capacity. CONSTITUTION: The optical disk has capacity beyond the standard capacity of a recordable optical disk and data for confirming an original copy is recorded in the region, wherein the capacity beyond the standard capacity is attained by forming a minimal track width in an applicable track width. If the confirming data is recorded in the region, an inserted optical disk is discriminated to be original.

Description

Optical discs capable of authenticity determination and methods for determining same

The present invention relates to an optical disc capable of authenticity determination for determining the authenticity of an inserted optical disc, and to a method for determining the same. More specifically, the optical disc is manufactured so that the data capacity of the optical disc has a capacity of more than the standard capacity, Authenticate an authentic optical disc containing authenticity identification data in an arbitrary area which is not accessible by recording authenticity verification data or referring to playlist information on the optical disc; and when the optical disc is inserted and mounted, the standard capacity of the optical disc Check the data in the excess area or check whether the authenticating data is recorded in an arbitrary area which is not accessed from the playlist information on the optical disc, and from this, the authenticity of the optical disc can be easily determined. A program capable of authenticity determination is included in the image and inserted according to the confirmation. Not performing the installation procedure for the application on the optical disk by, to a genuine determine the optical disc, and determine a method for its prevention (Anti-Piracy) the unauthorized copying of optical discs.

In general, a compact disc (CD), which is used as a read-only disc, is used as a recording medium for a large program, movie, music, etc. due to its large storage capacity, and its penetration rate is rapidly increasing. Even if the digital data recorded on the manufactured optical disc is repeatedly detected, there is no friction with the medium during recording detection, so the signal quality is the same as the original and the information preservation performance is excellent. There was,

However, due to the development of technology, a recordable optical record medium having excellent information storage performance has emerged as described above, and the price of a device capable of recording a signal on such an optical record medium has decreased, so that in recent years, a useful program or the like is easily recorded. Optical discs can be cloned, and a large number of illegal copy companies produce and distribute optical discs identical to the originals using a read-only disc production apparatus.

As a result, the software industry has suffered enormous losses due to piracy, and has been a cause for declining software developers' motivation. Therefore, the regulation on optical disk cloning is intensifying, but personal or covert piracy is prevented. Discrimination of the original of the disc and the copy protection technology using the same has emerged as a major solution in the field of optical storage media.

Therefore, various methods have been proposed to prevent illegal copying of the optical disk as described above. As one of the methods, the present inventors have described the "signal recording method of the copy preventing optical disk and the copy protection of the optical disk using the recording method." Method "has been filed in the patent application No. 97-32576, the signal recording method of the optical disk for copy protection proposed by the present invention and the method of copy protection of the optical disk using the recording method is specified in a certain area on the optical disk. One bit of a standard symbol or codeword is shifted by a predetermined size to be read out and reproduced as two signals, recorded as an abnormal symbol (delayed pit form), and the non-standard symbol is reproduced during reproduction. When played with two standard symbols, the optical disc was determined from the original.

However, in the above-described signal recording method of an optical disk for copy protection and an optical disk copy protection method using this recording method, one bit of a specific standard symbol or code word is moved to a predetermined area on the optical disk. Since accurate recording must be made in an undefined area on the optical disc (the area between the pit and the pit not within the tolerance range of the defined pit), much precision is required to control the amount of delay of the recording pit. In order to have the equipment with high cost, the manufacturing cost of the optical disc is increased because of this, whereas in the case of using the optical disc manufacturing equipment with low precision, the abnormal symbol is reproduced when the original optical disc is produced. The problem is that only one standard symbol is played back Will occur.

In addition, since an indeterminate area is managed by a large number of manufacturers in accordance with driver characteristics, even if expensive equipment that precisely processes the pit delay amount is used, an abnormal symbol is indeterminate when a disc is reproduced in a specific driver among the drivers having different indeterminate areas. It can be played back with only one standard symbol because it does not belong to the area. If delayed data is played back with only one symbol, a problem may be caused that the inserted optical disc is incorrectly identified as a duplicate even though the inserted optical disc is authentic.

Accordingly, the present invention has been made to solve the above problems, by making a true optical disc whose data capacity is greater than or equal to the standard capacity of the recordable optical disc and recording the data in an area exceeding the standard capacity, thereby providing an authentic optical disc. It is an object of the present invention to provide an optical disc capable of authenticity determination and a method of discriminating the same to simplify the determination of whether or not it is possible.

In addition, by making and providing a genuine optical disc containing authenticity identification data in a predetermined area which is not accessed with reference to playlist information on the optical disc, the authenticity determination which makes it possible to easily determine the authenticity of the optical disc is possible. Another object is to provide an optical disk and a method for determining the same.

Fig. 1 shows the data capacity of a general recordable optical disc (CD-R),

2A and 2B show an example of the data capacity and data recording form of an optical disc capable of authenticity determination according to the present invention;

3 shows a partial process of the manufacturing method of the read-only optical disc,

4A and 4B show an example of recording authenticity checking data on an optical disc, unlike FIGS. 2A and 2B according to the present invention.

Fig. 5 shows the construction of an embodiment of an apparatus for determining the authenticity of an optical disk according to the present invention.

6 is a flowchart showing the flow of a preferred embodiment of the authenticity determination method of the optical disc according to the present invention;

FIG. 7 shows a form in which data is recorded when the genuine optical disc of FIG. 2B is copied;

8 is a flowchart showing the flow of another embodiment of the authenticity determination method of the optical disc according to the present invention;

Fig. 9 shows the configuration of the entire system for determining the authenticity of an optical disk containing an installation program for determining authenticity in a specific area.

10 is a flow chart showing the flow of a preferred embodiment of the authenticity determination method of the optical disc according to the present invention made in the system of FIG.

Fig. 11 is a diagram showing an execution step of an installation program stored in a specific area on an optical disc capable of authenticity determination according to the present invention.

※ Explanation of code for main part of drawing

10 optical disc 11 pickup portion

20: R / F section 30: drive section

40: servo unit 50: digital signal processing unit

60: controller 70: liquid crystal display (LCD)

80: Ring Buffer 110: Memory

120: central processing unit (CPU) 130: keyboard

140: hard disk

An optical disc capable of authenticity determination according to the present invention for achieving the above object has a capacity greater than or equal to the standard capacity of a recordable optical disc, in which the data for authenticity verification is stored in an area exceeding the standard capacity, The feature is that the playlist information (TOC information) contains authenticity confirmation data in which the reproduction control information is not recorded.

In addition, the authenticity determination method of the optical disk according to the present invention, the presence of the recording data in the area exceeding the standard capacity of the recordable optical disk of the inserted optical disk, or the playlist information on the inserted optical disk It is characterized in that the inserted optical disc is discriminated as a true copy or a copy, depending on whether or not the recording data exists in a predetermined area other than the area accessed from.

The optical disc capable of authenticating the authenticity is, for authenticity verifying that the optical disc is determined to be genuine in the area exceeding the standard capacity in addition to the requested recording data during the process of manufacturing the optical disc having a size larger than the standard capacity of the recordable optical disc. It is produced by recording the data, or is produced by recording and authenticating the authentic data in the designated area without leaving the information recorded in the playlist information for accessing the data when the data is recorded on the optical disc.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of an optical disc capable of authenticity determination according to the present invention and a method of determining the same will be described in detail with reference to the accompanying drawings.

First, the manufacturing method of the optical disc capable of authenticity determination according to the present invention will be described.

First, a stamper is produced for recording data to be recorded on the optical disk. The track width of the optical disk produced by the stamper is the value within the allowable range (1.6 µm ± 0.1 µm) of the standard track width of the optical disk. It is about 1.52μm, which is a value close to the minimum value, that is, the playback device is manufactured so as to have the minimum track width so that the manufacturing error does not deviate from the minimum track width at a track pitch that can recognize each track separately.

Therefore, the data capacity of the normal recordable optical disc (CD-R) has a standard capacity of 650 Mbytes as shown in Fig. 1, but the optical disc capable of authenticity determination according to the present invention has a track width as described above. By making it the lowest track width within the allowable track width, a read-only optical disc having a capacity of about 680 Mbytes whose data capacity is larger than the standard capacity (650 Mbytes) of the recordable optical disc, the data area exceeding 650 Mbytes ( 2A and 2B, the authenticating data for authenticating the inserted optical disc as authentic is recorded, so that the stamper for the optical disc capable of authentic discriminant is finally completed.

Thus, when the track width is 1.52 μm, i.e., when the stamper containing the data for authenticity verification is completed in a specific area, the plastic plate and the stamper on which the data (program data, video data, etc.) are to be recorded are cured by ultraviolet rays. After filling with a resin (Fig. 3 (a)), and curing the resin by the ultraviolet rays from the plastic side (Fig. 3 (b)), a read-only genuine optical disk (see Figs. 2a and 2b) Will be produced (Fig. 3 (c)).

In this way, a reflective film is formed on the true optical disc on which data is recorded, and when the reflective film formation is completed, the protective film is applied so that the film is not oxidized, thereby producing the read-only genuine optical disc.

On the other hand, an optical disk that records all the capacity can be produced by recording unnecessary virtual data (see FIG. 2A) in addition to valid data (such as program or video data) when the data recording optical disk is rewritten as described above. By recording only the data (see Fig. 2B), an optical disc using only a part of the entire capacity can be produced.

In another method of manufacturing an optical disc capable of authenticity determination according to the present invention, playlist information (TOC information) is recorded in the lead-in area of the optical disc, and has a data capacity of 680 Mbytes. At least one authenticating data for identifying the optical disc as authentic is stored in a predetermined area of the optical disc (or an optical disc having a standard capacity of 650 MByte, which does not comply with the above-described manufacturing process), and the recording contents are included in the TOC information area. It is the same as the manufacturing method described above, except that the product is not recorded.

FIG. 5 is a block diagram of a preferred embodiment of an optical disc authenticity discriminant in which an optical disc authenticity discriminant method according to the present invention is implemented, and a pickup unit for reading a recording signal by injecting a light source into the optical disc 10 ( 11); A sled motor 12a for moving the pick-up part 11 in the radial direction of the optical disk; A spindle motor 12b for rotating the optical disc 10; A drive unit 30 for driving the sled motor 12a and the spindle motor 12b; An R / F unit 20 for filtering the signal detected by the pickup unit 11; The driving of the drive unit 30 is controlled from the focus error (FE) and tracking error (TE) signals output from the pickup unit 11, and the rotational speed of the optical disc, and the R / F unit 20 A servo unit 40 for detecting synchronization of an output signal of the controller; A digital signal processor (50) for restoring a signal read by the R / F unit (20) to an original digital signal using the detected synchronization; A controller 60 for determining whether the optical disk is authentic from the data read out from the optical disk and signal-processed; And a liquid crystal display (LCD) 70 for displaying authenticity according to the determination result.

Fig. 6 is a flowchart showing the flow of a preferred embodiment of the optical disc determination method according to the present invention. Hereinafter, the method of Fig. 6 according to the present invention will be described in detail with reference to Fig. 5.

First, when the optical disk 10 is inserted (S10), the control unit 60 controls the pickup unit 11 through the drive unit 30 and the servo unit 40, the device of the optical disk 10 The record data is read out from the designated area, that is, an area exceeding 650 Mbytes (A in Fig. 2A).

The control unit 60 checks whether the data is read by the pickup unit 11 (S12), thereby determining whether the optical disc 10 is authentic or not, when the optical disc 10 is authentic. In the area exceeding 650 Mbytes, authenticity confirmation data is stored, and this data is read out by the pickup section 11 (S11), and the high frequency signal read out from the pickup section 11 receives the R / The filter is filtered by the F unit 20, and the filtered clean signal is synchronized with the servo unit 40, and the digital signal processing unit 50 returns the original digital data by the detected synchronization. By reconstructing and inputting the control unit 60, the control unit 60 accordingly determines the inserted optical disc 10 in its original form (S21), and the determination result, that is, whether the authenticity is true or not, in the liquid crystal display unit 70 Illegally copied optical Visually confirm that the disk (S22).

By the way, in the case where the read-only optical disk manufactured as shown in Fig. 2A is copied to a recordable optical disk having a recording capacity of 650 MByte, the entire data recorded from the inner circumference is normally read sequentially in accordance with the information of the TOC. Since the recording capacity is limited to 650 MBytes, the authenticity check data recorded in the area exceeding the standard capacity of FIG. 2A is not copied.

2B, when the authenticating optical disc is manufactured as shown in FIG. 2B, the duplication apparatus reads only the data except for the blank area through the TOC information. Therefore, the data recorded on the optical disc of FIG. In addition to this, the authenticity verification data is also read out, and its contents are copied to the recordable optical disc. At this time, the recording area of the data copied and copied by the copying apparatus is shown on Fig. 7 on the optical disc.

Therefore, in the case of producing a genuine optical disc as shown in FIG. 2A, the pickup unit 11 is arranged such that the control unit 60 reads out recording data from a track exceeding the standard capacity of the optical disc 10 (650 Mbytes). In spite of the control, when there is no data to be read from the pick-up unit 11, when the data to be read is lead-out data or when a disc area excess signal or the like occurs (S12), the control unit 60 According to the result (S20) to discriminate the optical disk 10 as an illegally copied optical disk (S23), the determination result is also displayed on the liquid crystal display 70 (S22).

2B, when the authentic optical disc is manufactured as shown in FIG. 2B, the microcomputer 60 causes the pickup unit 11 to read the authentic confirmation data referenced through the TOC, and then restores the data by the above-described process. The position information of the generated data, that is, the absolute visual information or the frame information, is compared with the position information of the authenticity confirmation data on the original authentic optical disc to determine the authenticity or to recognize the authenticity based on the difference of the value. After moving the pick-up unit 11 through the drive unit 30 to a position of, and if data is not detected at the position, the liquid crystal display unit determines the illegally copied optical disk accordingly. It is indicated through 70.

8 is a flow chart showing the flow of another embodiment of the true discriminant method of the optical disc according to the present invention. Hereinafter, the discriminant method of FIG. 8 according to the present invention will be described in detail with reference to FIG.

First, when the optical disk 10 is inserted (S30), the controller 60 controls the pickup unit 11 through the drive unit 30 and the servo unit 40, so that the optical disk 10 The pick-up unit 11 is moved to a predetermined physical track position of the recorded data (B area (region in the program area) in Fig. 4A) that reads TOC information but is not included in the TOC information. The recording data is read out from the area (S31), the data is checked by the pickup section 11 (S32), and the authenticity of the optical disc 10 is determined. Since the information is not accessed at the time of optical disc duplication, and the data of the corresponding area is not copied, the area B data of Fig. 4A, which is not referenced by the TOC, does not exist on the duplicated optical disc. do.

Therefore, when the data for authenticity check is read out by a predetermined number from a predetermined area not referenced in the TOC information (S40), the control unit 60 determines the optical disc 10 as authentic (S41). Otherwise, the optical disc 10 is identified as a duplicated disc (S43), and the determination result is displayed through the liquid crystal display unit 70 (S42).

Also, in the above embodiment, even if the region not referred to by the TOC is designated as the region C of FIG. 4B, that is, the region after the lead-out region, and not the region within the program region, the above-described embodiment can be implemented.

FIG. 9 is a diagram showing the configuration of an entire system equipped with a CD-ROM driver for explaining whether the CD-ROM disk containing the program for determining authenticity in a specific region is authentic and its operation. The optical disk drive unit A 'of the entire system is configured as a general CD-ROM driver, and a ring buffer 80 for exchanging data with the host is included for connection with the host. .

An external device (PC) connected in signal connection with a driving unit (A ') of the optical disk includes: a memory (110) for storing a line input from the ring buffer (80); A keyboard 130 for receiving a user input; And a central processing unit (CPU) 120 for loading and executing a program from the hard disk 140 at the user's request.

Fig. 10 is a flowchart showing the flow of a preferred embodiment of the authenticity determination method of the optical disc according to the present invention made in the entire system of Fig. 9, with reference to the configuration of the embodiment of Fig. 9 below. The method will be described in detail.

First, a CD-ROM disk containing a program for determining authenticity in a specific area is inserted into the optical disk drive unit A '(S50), and the optical disk drive unit A' from the hard disk 140 is inserted. In a state in which a driving program of a) is loaded in the memory 110, when a user requests execution of a program recorded in a specific region of an inserted optical disc through the keyboard 130 of an external PC (S51), The central processing unit 120 requests reproduction and transmission of the program to the control unit 60 in the driver A 'through the ring buffer 80.

Accordingly, the control unit 60 controls the pickup unit 11 to read a program recorded in the form of a file on the optical disc, and the data read by the pickup unit 11 is read by the R / F. The unit 20, the servo unit 40, and the digital signal processing unit 50 process the signals as described above and temporarily store them in the ring buffer 80, and then sequentially read them to the memory 110 in the host. Will be.

After the data reception to the memory 110 is completed, the stored program is executed by the central processing unit 120 (S52), and by the executed program, the central processing unit 120 is inserted optical In order to determine whether the disc is authentic, the ring buffer 80 transmits a control command for transmitting the playback sequence information (absolute time information or frame information) of the unit data (98 frames) reproduced as necessary to the host. Through the transmission to the control unit 60 of the disc drive unit A ', a reproduction command for reproducing a specific area or a specific test file is transmitted. If the program for authenticity verification is an installation program for installation of an application program, the program loaded in the memory performs the schematic steps of FIG.

The central processing unit 120 in the host, in accordance with the command of step a of the loaded installation program, records data for authenticating the authenticity from the inserted optical disc 10 to the control unit 60 (file name is for example). 'AUTHENTIC') is requested (S53), and accordingly, the control unit 60 stores the file having the name of 'AUTHENTIC' among the recorded data through the TOC information read out by the pickup unit 11. The presence is confirmed, and the result is notified to the CPU 120 in the host through the ring buffer 80. Accordingly, if the original optical disk is made in the form as shown in Figure 2a, it is possible to immediately determine whether the original and the replica according to the existence of the authenticity check file (S60).

Also, as shown in FIG. 2A, when all the effective and virtual data are recorded in the total recording capacity, and the inlet program for installing the application program is recorded in the excess area of the standard area, the application program is completely installed in the duplicated optical disc. There may be no installation program for the user, so that an illegally copied optical disk may not be available to the user.

However, in the form as shown in FIG. 2B, when a genuine optical disc having a blank space is produced, the CPU 120 executes the command of step b, which is the next execution code of the installation program.

The CPU 120 requests the controller 60 to confirm the absolute position on the optical disk 10 of the 'AUTHENTIC' file which has been confirmed according to the execution code of step b (S61). The control unit 60 reads the position value (Time Code or frame number in the sub cue data) on the optical disk where the 'AUTHENTIC' file is present and checks it again through the ring buffer 80 through the central processing unit. The central processing unit 120 compares the position value specified in the program and the received position value to each other according to step c of the currently executed installation program (S62). If it is confirmed (S70), the inserted optical disc 10 is discriminated in its original form (S71), and the execution program has a data recording form of FIG. 7, which is a duplicated disc produced as shown in FIG. 2B. disk Even if there has to copy the write data for the genuine check, it is able to be identified by, if it is determined by the original copy is performed following execution of the command code in step d.

The central processing unit 120 transmits a command for reproducing an application program on the optical disc 10 inserted into the control unit 60 according to the step d command of the installation program, thereby transmitting the command on the optical disc 10. The application program can be received and executed, or the program data can be installed in the device (S72).

If, as a result of comparing the position values of the central processing unit 120, if both position values are not the same, the central processing unit 120 is not able to perform the step c late and step d of the installation program, thereby The application program on the optical disc 10 cannot be executed or the program can be installed in the device, so that the recorded application program cannot be used with the illegally copied optical disc (S63).

On the other hand, in the case where the authenticity confirmation data of the authentic optical disc is produced as shown in FIG. 4A or 4B, which is inaccessible through the TOC information, the program loaded and executed in the memory 110 is the memory 110. Through the optical disk drive drive program resident in operation in the operation, the control command for requesting direct movement of the mounted optical disk to the physical track is transmitted to the control unit 60 in the driver A ', and then the The driver A 'transfers a movement to a track previously designated in the execution program, so that the control unit 60 moves directly to the requested track without referring to the TOC information and records a signal in the track. Detects and restores the data to the data through the above-described process through the ring buffer 80 to the CPU 120.

The execution program that has received the playback data from the designated area checks whether the data contains a predetermined authenticity verification code, and accordingly, verifies that the original or duplicated disc is the original disc. The second half of step c and d system will be executed.

In the case of a genuine disc manufactured as shown in Fig. 4A or 4B, since the data for copying is not made at the time of duplication, the corresponding area becomes unrecorded in the duplicated disc, so that playback control information such as subchannel data is applied. If no signal is generated, a signal detection error is generated for a data detection request in the corresponding area. If this error state is transmitted to a program running on the host through a control signal line different from the ring buffer 80, even in this case, Also, if it is determined as a duplicated optical disc, and in the case of the above-described duplicated optical disc, the program executed first from the optical disc indicates that the mounted disc is illegally copied and to stop using it. Illegal copy by outputting warning message and not performing any further data processing According to thereby interrupt the normal running of such programs on the optical disk.

The optical disc capable of authenticity and its discriminating method according to the present invention constructed and configured as described above have a data capacity of more than the standard capacity of a recordable optical disc (CD-R) or play list information on the optical disc. By recording the authenticity confirmation data in an arbitrary area that is not accessed by reference, the authenticity of the inserted optical disc can be easily determined by the detection or position of the authenticity confirmation data, and the installation stored on the optical disc. When the optical disc inserted by the program is determined to be a duplicated disc, the reproduction operation of the inserted optical disc, the execution of the program, or the like is not performed, thereby exhibiting a powerful effect in preventing illegal copying of the optical disc.

Claims (4)

An optical disc having a capacity greater than or equal to a standard capacity of a recordable optical disc, wherein authentic data is stored in an area exceeding the standard capacity. The method of claim 1, An optical disc capable of authenticity determination, characterized in that the capacity above the standard capacity is obtained by forming the minimum track width within the allowable track width. A first step of confirming the existence of authenticity confirming data from an area exceeding the standard capacity of the recordable optical disc of the inserted optical disc; And And a second step of discriminating the inserted optical disc as the authentic according to the verification result. A first step of detecting specific record data from an area after the reproduction area that references the playlist information on the inserted optical disc; And And a second step of discriminating the inserted optical disc as the authentic according to whether the data is detected.