JP2005116138A - Original recording medium, recording and reproducing method, recording and reproducing system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To take appropriate measures against illicit copying by surely preventing the use of the data illicitly copied from an original on a recording medium. <P>SOLUTION: In the case of the original recording medium of a ROM structure, the recording medium is inevitably write disabled as a result of a writing operation (S 17) by execution of an authentication decision application program recorded therein (Y of S 19 or Y of S 22), and therefore the recording medium is decided to be the original recording medium by the write disable result and the reproduction operation thereof is enabled. On the other hand, in the case of the writable illicit copy medium of an R or RW structure, the recording medium is inevitably write enabled as a result of a writing operation (S 17) by execution of the authentication decision program recorded by copying (N of S 22) and therefore the recording medium is decided to be the illicit copy medium by the write enable result and the reproduction operation thereof is disabled. The reproduction operation is thus prohibited, and even if the illicit copy medium is made, such medium is unusable and valueless. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an original recording medium such as a CD-ROM or a DVD-ROM, and a recording / reproducing method and a recording / reproducing system capable of preventing unauthorized use of an illegally copied product.

  As recording media for recording information, optical discs such as CD-ROM and DVD-ROM are widely used. These optical discs are read-only optical discs that are produced in large quantities at a factory and provided to users as original recording media. Such a read-only optical disk transfers a pit row formed on a master by a master exposure apparatus to a stamper (referred to as “mastering”), transfers the stamper to a molding substrate as a mold, and a reflective film on the molding substrate. By providing a protective film, etc., it has a data structure in which digital data is recorded together with time information (header address: physical address) as a pit, and data is reproduced based on the time information recorded in the pit. Yes.

  On the other hand, in recent years, CD-R, CD-RW, DVD + R, DVD + RW discs and the like are widely used as recordable optical discs. In these recordable optical discs, a groove on which time information is recorded is formed on the entire surface, and a recording film (a dye or the like in CD-R, DVD + R, CD-RW, etc.) is formed on a molded substrate on which the groove is formed. Phase change film (DVD + RW), reflection film, protective film, etc. are formed. By writing marks with CD-R / RW, DVD + R / RW writer so as to match the recorded time information, header address ( Time information) and data are recorded.

  With the widespread use of such media, recordable CD-R / RW writers or CD-R / RW and DVD ± R / RW writers are standard on PCs (host machines) instead of playback-only CD-ROM players. Has become widely used.

Japanese Patent Laid-Open No. 06-302092 JP 09-274774 A

  Here, the information recorded on the read-only optical disk = original disk as described above is digital information and does not deteriorate even when copied, and a recordable CD-R / RW writer or CD-R / RW, With the widespread use of DVD ± R / RW writers, there is a problem that information such as data and application programs recorded on an original recording medium such as a read-only optical disk is illegally copied and used.

  Regarding prevention of such unauthorized copying, for example, according to Patent Document 1, it is determined whether a medium mounted on a drive is read-only or rewritable. When the medium is determined to be rewritable, reproduction is disabled, and the difference in cartridge shape used for the medium or the difference in reflectance from the medium is used as a medium identification method.

  In this case, it cannot be applied to a medium that does not use a cartridge, and regarding the difference in reflectance from the medium, attention is paid to the original CD and the copy CD-RW. The reflectivity is substantially the same between the media, and it cannot be applied in the case of a copy CD-R, and is insufficient as a countermeasure against unauthorized copying.

  Further, according to Patent Document 2, it is determined whether the ID file can be rewritten or not (original or copy (rewritable medium)). However, when applied to a copied recordable medium (medium that can be recorded only once, such as a CD-R), the ID is already recorded (copied), so the rewrite operation does not end normally and the original As a countermeasure against unauthorized copying.

  An object of the present invention is to reliably prevent illegal copying by properly using data illegally copied from an original on a recording medium such as an optical disk.

  In the original recording medium according to the first aspect, when the medium is mounted on the recording / reproducing apparatus, the original recording medium in the medium is written in a specific area for determining the original in the host device connected to the recording / reproducing apparatus. When the write operation is performed and a write-in impossible state is detected, it is determined that the medium is the original recording medium and the reproduction data area can be reproduced while the data can be written. In this case, an original / copy determination-corresponding processing application program that executes a process of determining that the medium as a copy medium and disabling playback of the playback data area is recorded together with the playback data, and at least for the original determination. The specific area has a structure that is not physically writable.

  According to a second aspect of the present invention, in the original recording medium according to the first aspect, the entire medium has a ROM structure.

  According to a third aspect of the present invention, in the original recording medium of the first or second aspect, the original / copy determination corresponding processing application program and the reproduction data are sandwiched between a lead-in area and a lead-out area. Are recorded in a recordable data structure in which the medium is not closed.

  According to a fourth aspect of the present invention, in the original recording medium according to the third aspect, the specific area for original determination is a session next to the last recorded session.

  According to a fifth aspect of the present invention, the original recording medium according to any one of the first to fourth aspects has disc information indicating that the medium is rewritable.

  According to a sixth aspect of the present invention, in the original recording medium according to any one of the third to fifth aspects, a session area in which the original / copy determination corresponding processing application program and reproduction data are recorded, and an outermost part of the medium. A ROM structure having a reflective film on prepits formed by mastering on a transparent resin substrate and modulated in accordance with information in the radial direction and wobbled up to a recording stop position when recording the lead-out.

  According to a seventh aspect of the present invention, in the original recording medium according to any one of the third to fifth aspects, a session area in which the original / copy determination corresponding processing application program and reproduction data are recorded is formed on a transparent resin substrate. An area up to a recording stop position when a lead-out is recorded on the outermost side of the medium outside the area and having a reflective film on the prepit formed by mastering and modulated based on information in the radial direction and wobbled Is a ROM structure having a reflective film on a groove formed by mastering on a transparent resin substrate and modulated and wobbled in accordance with information in the radial direction.

  According to an eighth aspect of the present invention, there is provided a recording / reproducing method according to any one of the first to seventh aspects, wherein the original recording medium or the copy medium according to any one of the first to seventh aspects is recorded on these media when mounted on a recording / reproducing apparatus. In accordance with the original / copy determination corresponding processing application program, a step of causing the host device connected to the recording / reproducing apparatus to perform a write operation on a specific area in the medium, and write disable / write along with the execution of the write operation A process for detecting whether the recording is possible, a reproduction permission process for determining that the recording medium is an original recording medium and reproducing the data area for reproduction when a non-writable state is detected, and writable If it is, the reproduction prohibiting step of determining that the medium is a copy medium and prohibiting reproduction of the reproduction data area is provided.

  According to a ninth aspect of the present invention, there is provided a recording / reproducing method according to the fifth aspect, wherein when the original recording medium or the copy medium according to the fifth aspect is mounted on a recording / reproducing apparatus, the original / copy determination corresponding process recorded on the medium is recorded. And a step of causing the host device connected to the recording / reproducing apparatus to execute an erasing operation on a specific area in the medium in accordance with the application program for use.

  According to a tenth aspect of the present invention, the erasing operation according to the ninth aspect is a quick erasing command.

  In the recording / reproducing method according to an eleventh aspect, the specific area according to the ninth aspect is a session after the second session, and the erasing operation is a final session erasing command.

  According to a twelfth aspect of the present invention, in the recording / reproducing method according to the eighth aspect, the detection of the unwritable state is determined based on error information from the recording / reproducing apparatus during a write operation.

  According to a thirteenth aspect of the present invention, in the recording / reproducing method according to the eighth aspect, the detection of the unwritable state is determined based on the presence or absence of an error during reproduction related to the specific area after the writing operation by the recording / reproducing apparatus.

  A fourteenth aspect of the present invention is a recording / reproducing system in which a recording / reproducing apparatus and a host device are connected, and the host device has the original recording medium according to any one of the first to seventh aspects or a copy medium thereof. When mounted on the recording / reproducing apparatus, the original / copy determination corresponding processing application program recorded on these media is executed.

  According to the present invention, the original recording medium need not be writable in nature, but the unauthorized copy medium needs to be writable, and the medium is mounted on the recording / reproducing apparatus. In such a case, the host machine is caused to perform a write operation on a specific area for original determination in the medium, and when the write disabled state is detected as a result of execution of the write operation, the medium is regarded as the original recording medium. The reproduction / data area can be reproduced by making a determination. On the other hand, if it is writable, the medium is determined to be a copy medium and the reproduction / data area is reproduced. By copying the application program for copy determination processing along with the playback data, such an original can be copied if copied illegally. Since the application program for copy determination processing is also copied, if the original recording medium is mounted, it cannot be written by executing the original / copy determination processing application program, so it can be determined that the original recording medium is the original recording medium. The reproduction of the reproduction data can be permitted. On the other hand, when the copy medium is mounted, it can be determined as an illegal copy medium because it can be written by executing the original / copy determination corresponding processing application program. Reproduction of the reproduction data can be disabled, and an illegal copy medium cannot be practically used and can be made worthless.

  In particular, according to the third aspect of the present invention, the data structure of the original recording medium is a multi-session method and is a recordable data structure in which the medium is not closed. When mounted on the apparatus, it is possible to clearly confirm that writing is impossible by performing a writing operation formally. In this case, according to the invention described in claim 4, by setting the specific area for original determination as the session next to the last recorded session, in the case of a copy medium, the specific area is always in an unrecorded state before writing. Therefore, since it is writable at the time of executing the original / copy determination corresponding processing application program when the copy medium is mounted, it can be clearly confirmed that the copy medium is a copy medium.

  Further, according to the invention described in claim 5, it is not necessary that the original recording medium is essentially rewritable (erasable), but it is noted that an illegal copy medium needs to be rewritable (erasable). When the medium is mounted on the recording / reproducing apparatus, the host device is caused to execute a rewrite (erase) operation on a specific area for original determination in the medium. Thereafter, the program on the disk is activated or the data is reproduced. Here, in the original medium that has a ROM structure and does not have a recording layer, the disk is not erased and can be operated. However, in the copy medium, the disk is erased and the program file and the data file cannot be read. Will be interrupted. Thus, the copy medium can be surely excluded.

  According to the invention described in claim 6, the original recording medium can be provided as a medium having the same ROM structure as a normal CD-ROM, DVD-ROM, etc. According to the invention described in claim 7, the original recording medium can be provided. The unrecorded area of the medium can be provided as a medium having a ROM structure that is formally similar to a write-once medium. In these cases, whether the pre-pit or the groove is used, for example, wobbling is performed by modulation using ATIP information, so that it is possible to access a specific area.

  According to the ninth aspect of the present invention, when the copy medium is mounted on the recording / reproducing apparatus, the reproducing operation is executed on the specific area, so that the copying act itself can be invalidated.

  According to the tenth aspect of the present invention, since the erasing operation according to the ninth aspect is the erasing of management information by a quick erasing instruction, the erasing operation of the original / copy determination corresponding processing application program can be performed quickly, and the processing speed is increased. improves.

  According to the invention described in claim 11, the specific area described in claim 9 is a session after the second session, and the erase operation is a final session erase command. The lead-in, which is the management information of the second session, is shorter than the first session, and the erasing operation of the application program for processing corresponding to original / copy determination can be quickly performed, thereby improving the processing speed.

  According to the twelfth aspect of the present invention, for example, the optimum recording power to be performed immediately before the recording operation is determined by determining the detection of the non-writable state based on error information from the recording / reproducing apparatus during the writing operation. This can be easily realized by detecting an error during OPC. Further, although an error at the time of OPC may not be notified as an error, according to the invention of claim 13, the detection of the unwritable state is determined based on the presence or absence of an error at the time of reproduction of the specific area after the write operation. As a result, in the case of the original recording medium, writing cannot be actually performed and an error at the time of reproduction always occurs, so that the original recording medium can be reliably specified.

  The best mode for carrying out the present invention will be described with reference to the drawings.

  First, a configuration example of an optical disc apparatus (drive) that is a recording / reproducing apparatus used in the present embodiment will be described with reference to FIG. In this embodiment, as a recording medium 1, in addition to a read-only optical disc such as a CD-ROM, a recordable optical disc such as a recordable CD-R (CD-Recordable) that can be written only once and conforms to the CD format, An example of application to an optical disc apparatus targeting a rewritable optical disc called CD-RW (CD-Rewritable) that conforms to the CD format will be shown.

  The schematic configuration and operation of the optical disc apparatus will be described with reference to FIG. First, with CD-based discs, the dye material or phase change material on the disc substrate is irradiated with data-modulated laser light to form pits or marks, and these are irradiated with laser light to change the reflected light. Read data. This data string is arranged in a spiral on the disk substrate like a record. This spirally arranged line is called a track, and the distance between adjacent tracks is 1.6 μm.

  Such an optical disk 1 is rotationally driven by a spindle motor 2 as driving means. The spindle motor 2 is controlled by the motor driver 3 and the servo means 4 so that the linear velocity is constant (CLV) or the rotational speed is constant (CAV). The linear velocity can be changed in stages. The optical pickup 5 includes a semiconductor laser, an optical system, a focusing actuator, a tracking actuator, a light receiver, a position sensor, and the like, which will be described later, and irradiates the recording surface of the optical disc 1 with laser light.

  The optical pickup 5 can be moved in the sledge direction (disk radial direction) by a seek motor (not shown). These focusing actuators, tracking actuators, and seek motors are controlled by the motor driver 3 and the servo means 4 so as to position the laser spot at a target location on the optical disk 1 based on signals obtained from the light receiver and the position sensor.

  At the time of data reproduction, a reproduction signal obtained by the optical pickup 5 is amplified by a read amplifier 6 and subjected to equalizer processing or binarization (digitization) processing, and then input to a CD decoder 7 for EFM demodulation. That is, the EFM signal is data obtained by modulating 8-bit data into 14-bit data so that it can be easily reproduced or recorded optically. The EFM demodulated data is subjected to deinterleaving (reordering processing) and error correction processing. Do. Further, the data after the deinterleaving and error correction processing is input to the CD-ROM decoder 8 to perform error correction processing for improving data reliability.

  Thereafter, the data processed by the CD-ROM decoder 8 is temporarily stored in the buffer RAM 10 by the buffer manager 9 and transferred to the host side at once by the interface 11 such as ATAPI or SCSI when it is prepared as sector data. In the case of music data, the data output from the CD decoder 7 is input to the D / A converter 12 to extract an analog audio signal.

  On the other hand, at the time of data recording, when data transferred from the host via the interface 11 such as ATAPI or SCSI is received, the data is temporarily stored in the buffer RAM 10 by the buffer manager 9. Recording starts when a certain amount of data accumulates in the buffer RAM 10, but before that, the laser spot is positioned at the writing start point. The writing start point is obtained by an ATIP (Absolute Time In Pre-groove) signal which is a wobble signal preliminarily carved on the optical disc 1 by meandering tracks (pregrooves). The ATIP signal is time information indicating an absolute address on the optical disc. The ATIP decoder 13 extracts the ATIP signal information, detects an ATIP error, and measures the ATIP signal detection error rate.

  The synchronization signal generated by the ATIP decoder 13 is input to the CD encoder 14 so that data can be written at an accurate position. Data in the buffer RAM 10 is subjected to error correction code addition and interleaving (rearrangement) by the CD-ROM encoder 15 and the CD encoder 14, and then EFM-modulated. The data is transferred to the optical disk 1 through the laser control circuit 16 and the optical pickup 5. To be recorded.

  Such an optical disk apparatus includes a microcomputer 20 including a CPU 17, a ROM 18, and a RAM 19 for controlling the operation of each unit described above.

  For example, as shown in FIG. 2, the optical disc device 21 having such a configuration is connected to a host device 22 such as a PC to form a recording / reproducing system 23, and the recording / reproducing system 23 is controlled by the host device 22. Utilized below. The host device 22 in the recording / reproducing system 23 includes a main control device 24, an interface 25, a recording device (HDD) 26, an input device 27, a display device 28, and the like. The main controller 24 includes a microcomputer, a main memory (both not shown), and the like, and controls the entire host. The interface 25 is a bidirectional communication interface with the optical disc device 21 and conforms to a standard interface such as ATAPI and SCSI. The interface 25 is connected to the interface 11 of the information recording device 21. The connection form between the interfaces 11 and 25 may be not only a cable connection using a communication line such as a communication cable (for example, a SCSI cable) but also a wireless connection using infrared rays.

  The recording device (hard disk drive HDD) 26 stores a program written in a code readable by the microcomputer of the main control device 24. When the drive power supply of the information processing apparatus is turned on, the program is loaded into the main memory of the main controller 24. The display device 28 includes a display unit (not shown) such as a CRT, a liquid crystal display (LCD), and a plasma display panel (PDP), and displays various information from the main control device 24. The input device 27 includes at least one input medium (not shown) such as a keyboard, a mouse, and a pointing device, for example, and notifies the main control device 24 of various information input by the user. Note that information from the input medium may be input in a wireless manner. Further, as an example in which the display device 28 and the input device 27 are integrated, there is a CRT with a touch panel, for example.

  The host machine 22 is equipped with an operating system (hereinafter referred to as “OS”). It is assumed that all devices constituting the host machine 22 are managed by the OS.

  A configuration example of the original recording medium 1o of the present embodiment that can be used in such a recording / reproducing system 23 will be described with reference to FIGS. First, an example of the data structure of the original recording medium 1o of the present embodiment will be described with reference to FIG. In the present embodiment, for example, data necessary for the CD-R / RW multi-session method defined by the Orange Book standard is recorded. That is, the multi-session method is a method in which a unit composed of a program area sandwiched between a lead-in area and a lead-out area is one session, and a plurality of such sessions are provided in the disk radial direction. For example, an authenticity determination application program (an original / copy determination corresponding processing application program), which will be described later as an example of operation control, is recorded in the first session, and the original purpose of the original recording medium 1o is the second session serving as a reproduction data area. The playback data is recorded.

  Note that the application program may be recorded on the first track of the first session, and the reproduction data may be recorded on the second track. Further, there may be a session in which data is recorded outside the second session. However, in the present embodiment, recording is performed up to the second session, and the outside is in an unrecorded state. More specifically, the data is recorded by the CD-R / RW multi-session method, but is recorded as a recordable data structure in which the medium is not closed. A third session subsequent to the second session (recorded last session) is a specific area used for original determination when the above-described authentication determination application program is executed. More specifically, the subcode Q frame in the lead-in area of the first and second sessions is recorded as POINT = B0 indicating multi-session. In addition, the Start time of the program area of the third session is recorded in “Start time of next possible program in the Recordable Area” recorded in the lead-in area of the second session. The value is set to a value smaller than “Maximum start time of outer most lead-out area (recording start time when Lead Out is recorded on the outermost side)”.

  An example of the physical structure of the original recording medium 1o having such a data structure will be described with reference to FIG. The original recording medium 1o of the present embodiment is basically manufactured as a read-only ROM structure that cannot be written at all. As shown in FIG. 4A, first, an authentication application program and reproduction data are formed by prepits 31 by mastering in the first and second sessions, respectively. Also, the pre-pit 32 by mastering is formed in the unrecorded area after the third session (the area up to the recording stop position when the lead-out is recorded on the outermost side of the medium 1o) as in the second session. However, in this case, it is not necessary to be modulated by information, and a fixed pit length is sufficient. All these prepits 31, 32 have a wobbling modulated to include ATIP information. A reflective film 34 made of aluminum or the like is directly provided on the transparent resin substrate 33 on which the wobbling pre-pits 31 and 32 are formed, and a protective film 35 is provided on the reflective film 34. Such a physical structure is the same as that of a normal CD.

  As another embodiment of the physical structure example of the original recording medium 1o, for example, as shown in FIG. In FIG. 4B, the authentication application program and the reproduction data are formed with the prepits 31 by mastering in the first and second sessions, respectively, as in the case of FIG. 4A. In the unrecorded area (area up to the recording stop position when the lead-out is recorded on the outermost side of the medium 1o), a groove 36 is formed as a track servo guide groove. All these prepits 31 and grooves 36 have a wobbling modulated to include ATIP information. A reflective film 34 made of aluminum or the like is directly provided on the transparent resin substrate 33 on which the wobbling pre-pits 31 and grooves 36 are formed, and a protective film 35 is provided on the reflective film 34. Such a physical structure conforms to a normal CD, but an unrecorded region in which the groove 36 is formed has a structure conforming to, for example, a CD-R, etc. except that there is no recording film. .

  When such an original recording medium 1o is illegally copied using a CD-R or CD-RW, the copy medium 1c also has an unclosed data structure with respect to the authentication application program and the reproduction data. It will be copied.

  In such a configuration, when the original recording medium 1o or the copy medium 1c is mounted on the optical disc device 21, the authentication application program recorded in the first session is started as shown in FIG. 5 (step S1). ), Causes the main control device 24 of the host machine 22 to execute an optical disk authenticity determination process (original or copy determination process) by an authenticity determination application program (S2), and executes a process according to the authenticity determination result (S3). ).

  Here, an example of an optical disk authenticity determination process by the authenticity determination application program will be described with reference to a schematic flowchart shown in FIG.

  First, in accordance with the Read TOC command, the TOC information of the medium 1o or 1c mounted on the optical disc device 21 is read (S11). At this time, since the firmware of the optical disk device 21 accesses an address (unrecorded area) of an STNPP described later, it is necessary to read the address by the ATIP signal and to control the rotation of the spindle motor 2, so that the prepit 32 of the original medium 1o is described above. Thus, wobbling modulated by ATIP information is necessary. When the STNPP cannot be accessed without wobbling, the mounting operation of the original medium 1o is not completed, and the necessary data cannot be reproduced.

  After reading the TOC information, the error information is obtained from the optical disk device 21 with the Reqest Sence command (S12). If a reproduction error occurs during the execution of the Read command (Y in S13), is it determined as a normal error? Alternatively, it is determined that the recording medium is not an original recording medium whose quality is guaranteed, a message that cannot be reproduced is issued (S23), the confirmation button is recognized (S24), and the process returns to the main routine.

  On the other hand, if no reproduction error has occurred as a result of obtaining error information from the optical disc apparatus 21 using the Reqest Sence command in step S12 (N in S13), “STNPP: Start time of” obtained by the Read TOC command in step S11. “Next possible program in the recordable area” is converted into a decimal number and is set to N (S14). In addition, “STOLO: Maximum start time of outer most lead-out area (recording start time when Lead Out is recorded on the outermost side)” is converted into a decimal value and set to M (S15).

  Then, the magnitudes of these decimal numbers N and M are compared (S16), and if M is less than or equal to N (N in S16), that is, if the data structure is incapable of writing new data, an error occurs. And a message that cannot be reproduced is issued (S23). After the confirmation button is recognized (S24), the process returns to the main routine. On the other hand, when N is smaller than M (Y in S16), that is, in the case of a data structure in which new data can be written, STNPP is used as the recording start address, and at least one sector is recorded (S17). In the case of the present embodiment, since it is a multi-session recording that is not closed, the area to be recorded at this time is the session next to the last recorded session = the third session, and the third session. The session becomes a specific area for original judgment. Such a specific area is always in an unrecorded state before writing even in the copy medium 1c. At this time, since the writing operation of the optical disk device 21 requires reading of the writing position address and rotation control of the spindle motor 2, the prepit 32 also needs wobbling modulated by ATIP information.

  In relation to such a writing operation, error information is obtained from the optical disc apparatus 21 by a Reqest Sence command (S18), and the presence / absence of error information during the writing operation is determined (S19). If an error occurs during recording in this determination process (Y in S19), it is determined that the mounted optical disk 1 is the original recording medium 1o, and the process returns to the main routine. In this processing, the recording error occurs in the case of the original recording medium 1o because normal recording is impossible because the original recording medium 1o has the same read-only ROM structure as a normal CD. Accordingly, during a write operation, an OPC (Optimum Power Control) operation for setting an optimum recording power value is performed by a control program stored in the ROM 18 of the optical disk device 21 by a Write command from the host device 22. In operation, since the laser power value is changed and the signal after recording is used, normal OPC operation is not performed on the original recording medium 1o having a structure incapable of physically recording as shown in FIG. As a result, if the control program of the optical disc device 21 communicates with the host device 22 as an OPC error, it is determined as an error in step S19. However, depending on the optical disk device 21, the control program may not output error information to the host device 22 and may set a recording laser power prepared in advance, so that it may not be determined as an error in step S19.

  If no error is determined in step S19, the area recorded in step S17 (start address: STNPP) = specific area is reproduced (S20). In step S21, error information is obtained from the optical disk device 21 using the Reqest Sence command. If it is determined that an error has occurred during reproduction (S22), it is determined that the original recording medium 1o is used, and the process returns to the main routine. This is because the original recording medium 1o has a configuration incapable of writing.

  On the other hand, if there is no error in the determination in step S22, since the writing to the specific area has been performed normally, it is determined that the medium is the copy medium 1c, a message that cannot be reproduced is issued (S23), and the confirmation button After recognition (S24), the process returns to the main routine.

  In the process of step S3, when it is determined that the mounted medium 1 is the original recording medium 1o by Y of step S19 or Y of step S22, the reproduction data area can be reproduced. (Reproduction permission step) When it is determined that the medium 1 mounted by N in step S22 is a copy medium, and in the case of Y in step S13 and N in step S16, the reproduction data area cannot be reproduced. The reproduction operation is prohibited (reproduction prohibition process).

  As described above, according to the present embodiment, in the case of the original recording medium 1o having a ROM structure and not writable, writing is inevitably performed as a result of the writing operation by executing the recorded authenticity determination application program. Therefore, it is possible to determine that the original recording medium 1o is based on the result of the non-writable result, and the reproduction operation can be made possible. On the other hand, in the case of an unauthorized copy medium 1c that can be written with the R or RW structure Since the writing operation by the execution of the authentication application program recorded by copying is inevitably writable, it can be determined that the copy medium 1c is illegal based on the writable result. The reproduction operation can be disabled and the reproduction operation can be prohibited. Therefore, even if an unauthorized copy medium 1c is produced, it cannot be used practically and has no value.

  Here, an example of an optical disk authenticity determination process by the authenticity determination application program of the present invention will be described with reference to a schematic flowchart shown in FIG.

  First, a Read TOC command is issued to obtain a C1 pointer (S31). The C1 pointer is TOC information peculiar to CDRW. If it can be acquired, it is determined that rewriting (erasing) is possible (Y in S32), a Blank command is issued (S33), and if no command error occurs (N in S34), the main Return to the routine.

  If the C1 pointer cannot be obtained (N in S32) or if the Blank command results in an error (Y in S34), it is determined that rewriting (erasing) is impossible and the program is terminated (S34).

  In the main routine, the program on the disk is activated or data is reproduced. Here, in the original medium having a ROM structure and not having a recording layer, the disk is not erased and can be operated. However, in the copy medium, the disk is erased and the program file and the data file cannot be read. Will be interrupted.

  Here, the disc information indicating that rewriting (erasing) is possible may be a Disc Type that can be acquired by a Read ATIP command, in addition to the C1 pointer.

  Further, the processing time can be shortened by using minimally blank (quick erase) as the blank command.

  If a dummy file is recorded in the first session of the optical disc and an application program or playback data is recorded in the second session, the processing time can be further shortened by deleting only the last session using the Erase Session as a Blank command. And has the same effect.

It is a block diagram which shows the structural example of the optical disk apparatus used for embodiment of this invention. It is a schematic block diagram which shows the system structural example of a recording / reproducing system. It is explanatory drawing which shows the example of a data structure of an original recording medium. It is a typical perspective view which shows the physical structural example of an original recording medium. It is a schematic flowchart which shows a basic operation example. It is a schematic flowchart which shows the example of an authenticity determination process. It is a schematic flowchart which shows another authenticity determination processing example.

Explanation of symbols

1o Original recording medium 1c Copy medium 21 Recording / reproducing apparatus 22 Host machine 31, 32 Prepit 33 Transparent resin substrate 34 Reflecting film 36 Groove

Claims (14)

  When the medium is mounted on the recording / reproducing apparatus, the host device connected to the recording / reproducing apparatus performs a write operation on the specific area for original determination in the medium, and after this writing, the reading is impossible. When the state is detected, the medium is determined to be the original recording medium and the reproduction data area can be reproduced. On the other hand, when the state is writable, the medium is determined to be the copy medium and the reproduction data area can be reproduced. An application program for processing corresponding to original / copy determination for executing processing for making reproduction of a data area unusable is recorded together with reproduction data, and at least the specific area for original determination has a structure that cannot be physically written. Original recording medium that features.   2. The original recording medium according to claim 1, wherein the entire medium has a ROM structure.   The original / copy determination compatible processing application program and playback data are multi-session systems having a plurality of sessions each consisting of a program area sandwiched between a lead-in area and a lead-out area, and the medium is not closed 3. The original recording medium according to claim 1, wherein the original recording medium is recorded in a data structure that allows additional recording.   4. The original recording medium according to claim 3, wherein the specific area for original determination is a session next to a recorded last session.   5. The original recording medium according to claim 1, further comprising disc information indicating that the medium is rewritable.   It is formed by mastering on the transparent resin substrate up to the session area where the original / copy determination corresponding processing application program and playback data are recorded, and the recording stop position when the lead-out is recorded on the outermost side of the medium. 6. The original recording medium according to claim 3, wherein the original recording medium has a ROM structure having a reflective film on prepits modulated and wobbled based on information in a radial direction.   The session area in which the original / copy determination corresponding processing application program and the reproduction data are recorded is formed by mastering on a transparent resin substrate, and has a reflection film on prepits modulated and wobbled based on information in the radial direction. The area up to the recording stop position when recording the lead-out on the outermost side of the medium outside the area is the groove formed on the transparent resin substrate by mastering and modulated in accordance with information in the radial direction and wobbled. 6. The original recording medium according to claim 3, wherein the recording medium has a ROM structure having a reflective film. When the original recording medium according to any one of claims 1 to 7 or a copy medium thereof is mounted on a recording / reproducing apparatus, the original / copy determination corresponding processing application program recorded on the medium is used. A step of causing a host device connected to the recording / reproducing apparatus to perform a write operation on a specific area in the medium;
Detecting whether writing is impossible / writable with execution of the writing operation;
A reproduction permission step for determining that the medium is an original recording medium and enabling reproduction of the reproduction data area when a state in which writing is impossible is detected; and
A reproduction prohibiting step of determining that the medium is a copy medium and disabling reproduction of the reproduction data area if it is writable;
A recording / reproducing method comprising: When the original recording medium according to claim 5 or a copy medium thereof is mounted on a recording / reproducing apparatus, the original recording medium is connected to the recording / reproducing apparatus in accordance with the original / copy determination corresponding processing application program recorded on the medium. A recording / reproducing method comprising: causing the host machine to execute an erasing operation on a specific area in the medium. The erase operation is a quick erase command.
The recording / reproducing method according to claim 9. The specific area is a session after the second session, and the erase operation is a final session erase command.
The recording / reproducing method according to claim 9.   9. The recording / reproducing method according to claim 8, wherein the detection of the write disabled state is made based on error information from the recording / reproducing apparatus during a write operation.   9. The recording / reproducing method according to claim 8, wherein the detection of the write disabled state is determined based on presence / absence of an error during reproduction related to the specific area after the writing operation by the recording / reproducing apparatus. A recording / reproducing system in which a recording / reproducing apparatus and a host device are connected,
When the original recording medium according to any one of claims 1 to 7 or a copy medium thereof is mounted on the recording / reproducing apparatus, the host device performs the original / copy determination corresponding processing recorded on the medium. A recording / reproducing system characterized in that an application program is executed.

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