JP2003308659A - Recording medium, copy rotection method, and recording method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a recording medium capable of being reproduced by existing CD players without any problem, and to provide a recording medium for preventing copying of music data by CD-ROM drives. <P>SOLUTION: Information of 'Mode5' used by a CD extra is recorded to a TOC (Table Of Contents) on a disk read at first, and address information disabled of normal access is recorded as information denoting a start address of a succeeding session. For example, information denoting an absolute time not existing on the disk is recorded as the address information. Normal address information is recorded and a track jump destination by the address may be brought into an inaccessible state. The CD player disregards the 'Mode5' information and can normally reproduce the disk. The CD-ROM drive causes an error when jumping to the start address of a succeeding session on the basis of the 'Mode5' information and cannot reproduce the disk. Thus, copying of music data using the CD-ROM drive can be prevented. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording medium and a copy protection method applied to a read-only (ROM) type optical disc, and a recording method.

[0002]

2. Description of the Related Art CD-DA (Compact Disc-Digital Audi)
Optical discs such as o) and CD-ROMs (Compact Disc-Read Only Memory) are easy to handle and relatively low in manufacturing cost, and are therefore widely used as recording media for storing data. In recent years, a CD-R (Compact Disc-Recordable) disc on which data can be additionally recorded and a CD-RW (Compact D on which data can be re-recorded) can be recorded.
The isc-ReWritable) disc has been introduced, and it has become easy to record data on such an optical disc. From this, CD-DA disc, CD-ROM disc, CD-R disc, C
Optical discs conforming to the CD standard, such as D-RW discs, have become the core of data recording media.

In recent years, CD-ROM drives for computer devices and DVDs (Digital Versatile Discs) having upward compatibility with CD-ROM drives have become popular.
A ROM drive and a CD-R / RW drive are becoming standard equipment. The CD-ROM drive, the DVD-ROM drive, and the CD-R / RW drive maintain backward compatibility with media, and can reproduce a CD-DA disc for music.

In this way, C for the computer device is
D-ROM drive, DVD-ROM drive, CD-
With the standardization of the R / RW drive, digital audio data recorded on a music CD-DA disc is transferred to the CD-ROM drive or DVD-RO.
By reading with the M drive or the CD-R / RW drive and recording the data in, for example, a hard disk drive in a computer device, digital audio data in a CD-DA disc is digitally copied, so-called ripping is easily performed. Has become. Since the CD-DA does not employ a special copy protection technique, it is possible to easily digitally copy the recorded digital audio data. Ripping can be performed using a CD-ROM drive, a DVD-ROM drive, or a CD-R / RW drive at a speed that is several to several tens of times faster than the speed at which a normal CD player plays a CD-DA disc. Is.

[0005]

It is convenient for the digital audio data recorded on the CD-DA disc to be easily copied by this ripping, but it is a social problem from the viewpoint of copyright protection. Is becoming. The copyright is infringed by recording the ripped digital audio data on the CD-R disc or the like with exactly the same contents as the original CD-DA disc and transferring or selling it to another person. It will be.

Furthermore, in recent years, MP3 (Moving Pictures E
xperts Group 1 Audio Layer 3) and ATRAC (Adaptive
Audio data compression encoding technology such as Transform Acoustic Coding 3 is becoming widespread. The digital audio data ripped as described above can be compressed by MP3, ATRAC3, etc., and transferred to the world via a communication means by a computer device such as the Internet. Particularly recently, ripped digital audio data has been widely distributed by a file exchange system via the Internet, and the problem of copyright protection is becoming more serious.

As a measure to prevent this ripping,
Several methods are possible. The first is a method of taking countermeasures on the side of a computer device equipped with a CD-ROM drive, a DVD-ROM drive, and a CD-R / RW drive. For example, in an OS (Operating System) that is basic software installed in a computer device, a CD-D
It is conceivable to provide a function to prevent copying of the A disk. For example, when the medium loaded in the CD-ROM drive is a CD-DA disc,
Make the audio data recorded on the media unreadable.

Since the types of OSs and applications installed in a computer device are limited, even if an attempt is made to prevent copying of a CD-DA disc by this first method, software that breaks the mechanism will immediately come out. There was a problem that there is a high possibility.

[0009] In addition, it is widely used as an operating system for personal computers at present in Microsoft
t company's Windows (registered trademark) and US Apple
Since the Mac OS (registered trademark) and the like of each company are developed by a single manufacturer, it is easy to apply the first method. However, it is difficult to apply to a free OS, such as Linux, whose source code is open to the public, which is rapidly spreading at present.

Further, without the need for a computer device,
A CD-DA disc that can be ripped by itself to record the ripped digital audio data
The CD recorder that records on the CD-R that is D has a problem that it is not effective.

As a second method, it can be considered that the CD-ROM drive, the DVD-ROM drive, and the CD-R / RW drive side are compatible. For example, by rewriting the firmware, which is the program data stored in the control chip for controlling the drive mounted on the drive itself, it is possible to prevent the drive from playing a CD-DA disc. it can. Since the firmware stored in the control chip cannot be easily analyzed or changed, this second method can be said to be highly effective.

However, this second method has a problem in that it is difficult to introduce a new technique into the drives already on the market. That is, this second
According to this method, it is necessary to rewrite the firmware of the drives already on the market. On the other hand, the user can use the existing drive as it is. It is difficult to force users to rewrite drive firmware for copyright protection.

As a third method, it can be considered that the disk side of the CD-DA is compatible. If the CD-DA disc can be physically processed, a high effect can be expected. For example, as a CD-DA format, a method of introducing a new format in consideration of copy prohibition can be considered as a specific example of the third method.

However, in this case, considering that the existing CD player for reproducing the CD-DA disc can be used, there is a problem that a new format cannot be introduced. Existing CD-DA
As many CD players that reproduce digital audio data based on the above format are available in the world, there is a problem that the drive-dependent technology cannot be used like the third method.

Therefore, the object of the present invention is to provide an existing C
CD-ROM that can be played back without problems on a D player
It is an object to provide a recording medium and a copy protection method that prevent copying of digital audio data by a drive, a DVD-ROM drive, and a CD-R / RW drive, and a recording method.

[0016]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a second recording medium compliant with the compact disc standard, in which a second region is arranged after a first region in which a music track is recorded. Information for instructing access to the second area to the drive device having a function of accessing the area is recorded in the management area of the first area, and the information indicating the access cannot be normally accessed. It is a recording medium on which information for instructing access to is recorded.

Further, according to the present invention, in a copy prevention method for preventing copying of data recorded on a recording medium compatible with the compact disc standard, a second area arranged after the first area in which a music track is recorded. Information for instructing access to the second area to the drive device having a function of accessing the area is recorded in the management area of the first area, and as the information for instructing access, information on a position that cannot be normally accessed This is a copy prevention method characterized in that information for instructing access is recorded on a recording medium to prevent copying of data recorded on the recording medium using a drive device.

Further, according to the present invention, in the method of recording on a recording medium compliant with the compact disc standard, the recording medium compliant with the compact disc standard is arranged after the first area in which a music track is recorded. Information instructing access to the second area to the drive device having a function of accessing the second area is recorded in the management area of the first area, and normal access cannot be performed as the information instructing access. The recording method is characterized in that information for instructing access to a position is recorded.

As described above, according to the present invention, the second area is provided for the drive device having the function of accessing the second area arranged after the first area in which the music track is recorded on the recording medium. Information for instructing access to the first area is recorded in the management area of the first area, and as information for instructing access, information for instructing access to a position where normal access is not possible is recorded. When the drive area having a function of accessing the second area arranged after the first area is played back and the management area of the first area is accessed, the drive apparatus performs normal access. Access is attempted.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below. In the present invention, a CD-ROM drive, a DVD-ROM drive, a CD-R / RW drive, and a CD player for general music reproduction are used with different functions, and digital audio recorded on a CD-DA disc is used. CD-ROM drive and DVD for data
-Prevent copying using ROM drive and CD-R / RW drive. Among the information recorded in common on CD-DA and CD-ROM, CD-ROM drive and D
Copy protection is performed by using information that is used in the VD-ROM drive and the CD-R / RW drive and ignored by the CD player.

In the following, a CD-DA and a CD-ROM are generally used in addition to a so-called CD player for reproducing a CD-DA disc, such as a CD-ROM drive, a DVD-ROM drive, and a CD-R / RW drive. The CD-ROM drive will be described as an example of the drives capable of reproducing data.

Prior to the description of one embodiment of the present invention, in order to facilitate understanding of the invention, a CD-DA (Compa
ct Disc-Digital Audio) and CD Extra (CD EXTRA) which is one of the standards of CD-ROM will be described.

First, the CD-DA will be described. Figure 1
Shows schematically the layout of the CD-DA on the disc. The disc is traced from the inside to the outside, and the lead-in area, the program area, and the lead-out area are arranged in this order from the inside. A music track based on digital audio data is recorded in the program area. The lead-in area stores the track number of music data recorded on the disc, start position information, performance time information of the music data, and other management information of music tracks recorded in the program area. Of Contents)
Is recorded. The TOC is recorded in the subcode Q channel of the lead-in area.

In the following, digital audio data recorded as a music track will be referred to as music data.

When this CD-DA disc is loaded into a CD player or a CD-ROM drive, first, the lead-in area is automatically read and TOC information is acquired.
With a CD player or CD-ROM drive, this TOC
Based on the information, for example, designated music data can be reproduced.

FIG. 2 shows the TOC format. Among these, "CONTROL" is used for recognition of CD-DA and CD-ROM and as a copy bit.
“TNO” is a track number, and “00” is designated in the TOC. “CRC” is a 16-bit parity bit. In addition, "MIN", "SEC" and "FRAME", and "PMIN" and "PS"
In “EC” and “PFRAME”, time information and attribute information are described according to the value of “POINT”. "AD
"R" describes Mode information. The mode is designated by the value described in this "ADR". In the case of CD-DA, ADR = 1 is designated.

Next, the CD extra will be described.
An area consisting of a set of a lead-in area, a program area and a lead-out area is called a session. In the multi-session, a plurality of sessions can be provided on one disc. By using this multi-session, the CD extra uses the first session as a session in which a music track is recorded and the second session as a session in which data is recorded. I try to coexist with data.

FIG. 3 schematically shows the layout on the disc in the CD extra. First on the inside of the disc
The session is arranged, and the second session is arranged outside the session. The first session consists of a lead-in area, a program area in which music tracks are recorded, and a lead-out area, and has the same configuration as the CD-DA defined in the Red Book described above with reference to FIG. On the other hand, in the second session, the lead-in area and PVD (Primary Vol
ume Descriptor), path table and lead-out area. For example, ISO (International Organizatio)
ISO96 which is an international standard for
It has a configuration based on 60. The PVD and path table are omitted in FIG.

In the CD extra, a TOC is provided in each lead-in area for each of the first and second sessions. More specifically, the TOC area is provided in the subcode Q channel of the lead-in area. In the CD extra, "Mode" is used as TOC information.
5 ”information is included. That is, by designating ADR = 5 in the TOC format shown in FIG. 2 described above, it is shown that the format of the disc corresponds to “Mode 5”.

Further, when ADR = 5, POINT =
$ B0 indicates that the disc is a multi-session disc. At this time, "MIN", "SE
By "C" and "FRAME", the start address of the session next to the session including the TOC is described in absolute time on the disc and stored.

When ADR = 5, POINT = $
At C0, it is indicated that the session is the first session of a multi-session disc. At this time,
"0" is designated for each of "MIN", "SEC", and "FRAME". Also, "PMIN" and "PS
“EC” and “PFRAME” are “95: 00: 0”
"0" is designated.

FIG. 4 shows the format of the subcode Q channel in the lead-out area in "Mode 5". "Mode5" is indicated by setting ADR = 5, and the value "TNO" and the value "POINT" are "$ A", respectively.
It is fixed to "A" and "$ D1".

In the CD-ROM drive, when a disc is loaded, first, the TOC recorded in the lead-in area on the innermost peripheral side is read. That is, the TOC of the first session is read on the CD extra disc. Here, “ADR” in the TOC is ADR =
If it is set to 5 and indicates “Mode 5”, it means that the disc is a CD extra disc. Then,
The start address of the next session stored in the TOC is read by the CD-ROM drive. Then, based on the read start address information, a track jump is made to the next session, and the TOC of the session is
Is read. If the information of the next session is stored in this TOC, the track jump is further made to that session, and the TOC is read in the same manner.

In this way, in the CD-ROM drive loaded with the CD extra disc, the TOCs of all sessions on the disc are accessed. CD-R
In the OM drive, the T of each session read
When the OC information is linked in a predetermined manner and is reconstructed, the loaded CD extra disc can be reproduced.

The above-mentioned CD extra standard has already spread around the world, and almost all CD-standards are used.
ROM drive, DVD-ROM drive, CD-R /
The RW drive supports this standard.

On the other hand, in the CD player, since only the music data is required, even if the disc with the CD extra is loaded in the drive, only the first session is played back, and it is necessary to play it after the second session. There is no. Therefore, this information is ignored even if ADR = 5 in the TOC. Some CD players may not have a function of reading information stored in the "ADR" of the TOC from the beginning. Also, C
In the D extra, as described above, the lead-out area of the first session is provided immediately before the start position of the second session. Therefore, the first in the CD player
After the reproduction of the session is finished, the second session is not continuously reproduced.

Next, an embodiment of the present invention will be described. As mentioned above, CD players and CD-ROMs
The drive discriminates the type of the disc loaded based on the information stored in the TOC which is first read when the disc is loaded in the drive, and if the disc is a CD extra, the next recorded in the TOC is recorded. The track jump is performed to the position indicated by the start address information of the session, and the TOC of the next session is continuously read.

In the present invention, the CD is used by utilizing this specification.
Although it can be reproduced by the player, an error occurs in the CD-ROM drive so that the music data recorded in the music track can be made unreproducible by the CD-ROM drive. More specifically, in one embodiment of the present invention, the TO that is read first on the disc is
In C, the information of “Mode 5” is recorded with ADR = 5.

As described above, the C dedicated to normal music reproduction is used.
The D player ignores this "Mode 5" information, so that the user can play this music CD in the same manner as a conventional CD-DA. In the following, the disc according to the embodiment of the present invention will be referred to as “music CD” as appropriate.

On the other hand, when this music CD is loaded in the CD-ROM drive, the drive first accesses the lead-in area to read the TOC and obtain ADR = 5. As a result, the drive recognizes that the loaded disc is a disc of “Mode 5”. The drive attempts to access the TOC start address in the next session according to the information in "Mode 5".

Here, TO together with the information of "Mode 5"
The start address of the next session described in C is set such that normal access based on the start address is impossible. For example, an address that always causes an error in the CD-ROM drive is described as the start address of the next session. By doing so, even if this music CD is loaded into the CD-ROM drive, an error occurs at the first TOC reading stage, and the program area cannot be reproduced. Or CD-ROM
The drive continues to search for an address that does not exist in absolute time, and cannot shift to the process of reproducing the program area. That is, this music CD is a CD-ROM
It cannot be played on the drive.

More specifically, for example, the absolute time that does not exist on the disc is described as the start address of the next session. As an example of the absolute time that does not exist, a negative absolute time or a non-standard absolute time in the CD-DA that is defined as a total length of 74 minutes or 80 minutes, for example, "99 minutes 00 seconds" can be considered. That is, in the TOC information, when ADR = 5 and the value "POINT" is $ B0, the corresponding "MIN", "SEC", and "FRAM".
Let “E” be the absolute time that does not exist.

In this case, the CD-
Only the session with the same music track as the DA is recorded, and it is not necessary to provide the second session with the CD extra.

As another example of the description of the start address in which the normal access is impossible, the description of the start address itself is normal and corresponds to the access destination of the start address, that is, the start position of the second session. An address description in which the position is an inaccessible area can be considered. By doing so, an error is generated by accessing the position where the track jump is performed by the start address.

More specifically, it can be considered that the position is a mirror area where no pit exists. By doing so, when the track jump is made to the start address of the next session based on the information recorded in the TOC, for example, the address of the jump destination cannot be read. Therefore, it is possible to cause an error in the CD-ROM drive. The entire area corresponding to the second session can be used as the mirror area.

Not limited to the above, for example, an inaccessible state can be created by forming a meaningless pit in data at a position corresponding to the start position of the second session. By utilizing this, for example, the pits and the mirror area can be formed so as to express a predetermined logo or image at the stage of cutting the master of the music CD. As an example, if a pit and a mirror area are formed so as to display a logo indicating that the disc is copy protected, it can be explicitly announced that the disc is copy protected. More effective.

Further, it is possible to make the position inaccessible by physically scratching the position on the disk corresponding to the start address. Even with this method, since the address cannot be read when the track jumps to the position, an error can be generated in the CD-ROM drive.

Further, the start address of the current session may be described as the start address of the next session. By doing this, the CD-ROM drive in which the disc is loaded will be
The C area is repeatedly accessed, and the program area is not reproduced.

In this case, the CD-
Only the session with the same music track as the DA is recorded, and it is not necessary to provide the second session with the CD extra.

This example is not limited to this, and the start address of the next session is not limited to the start address of the current session, but may be another address as long as the address is repeatedly accessed between sessions. You can also

For example, at least the lead-in area of the second session is provided, and the TOC of the first session describes the start address of the second session as the start address of the next session. At this time, in the TOC of the second session, the second session start address is set as the second session start address.
Describe the start address of the session itself. By doing so, in the CD-ROM drive in which the disc is loaded, the TOC area of the second session is repeatedly accessed and the program area is not reproduced.

The information of "Mode 5" for the TOC and the address information of the next session start position are encoded in the subcode Q channel of the CD during the mastering process of the disc and recorded on the master disc. A music CD according to an embodiment of the present invention is manufactured based on the master disc by using a stamper or the like.

The mastering process for producing this master disk will be briefly described. Music data recorded as a music track in the program area is CIR
Parity addition for error correction and scramble processing by C (Cross Interleave Reed-Solomon Code) are performed.

On the other hand, subcode data of channels P to W based on the current CD standard is encoded into a subcode having an EFM frame format. Of the subcode channels, the P channel and the Q channel are used for the track position control operation of the pickup when reproducing the digital data recorded on the disc. The TOC information is included in the Q channel of the subcode data. The above-mentioned “Mode 5” information and the start position address of the next session accessed based on the “Mode 5” information are encoded as TOC information in the Q channel of this subcode data.

The music data to which the parity for error correction and scramble processing are applied, the subcode including the information of "Mode 5" in the Q channel and the start position address of the next session, and the frame sync signal. And are superimposed, and EFM (Eight to Fourteen Mod
modulation) to obtain a recording signal in the EFM frame format of CD.

The recording signal is modulated into a laser beam by an optical modulator, and the laser beam exposes the photoresist coated on the glass master. The glass master thus recorded is developed and electroformed to produce a metal master. A mother disk is created from this metal master, and next,
A stamper is created from the mother disk. Using a stamper, a CD is formed by a method such as compression forming or injection forming.
Is created.

The above-mentioned mirror region can be formed, for example, by stopping the input of the recording signal to the optical modulator for a predetermined period during the exposure of the photoresist by the above-mentioned laser beam. An image represented by pits in the mirror area can be formed by inputting data corresponding to the above-mentioned logo or image to the optical modulator when the photoresist is exposed by the laser beam, for example. The present invention is not limited to this, and can be formed by using a mask or the like corresponding to the region or image when the photoresist is exposed.

A case where a music CD according to an embodiment of the present invention is reproduced by a CD-ROM drive and a CD player will be described with reference to FIGS. 5 and 6, respectively. In addition, CD-ROM drive (and DVD-R
As the OM drive, the CD-R / RW drive) and the CD player, general ones can be used, and the configurations thereof are extremely well known, and therefore the description of the configurations of these drives will be omitted.

FIG. 5 is a flow chart showing the operation of an example of the CD-ROM drive. Here, CD-RO
The M drive is installed in a computer device, and is an OS (Operating System) installed in the computer device.
ystem) whose operation is controlled.

In FIG. 5, in the first step S10,
CD-ROM for opening and closing the disc loading tray
When the user presses the loading button provided on the drive, the tray is opened in the next step S11 so that the disc can be loaded. The tray may be opened based on an instruction from the computer device. When the tray is opened, the disc is loaded by the user, for example, the loading button is pressed again (step S12), and the tray is closed (step S13).

When the tray is closed, the next step S1
At 4, it is judged whether or not a disc is loaded in the CD-ROM drive in a predetermined manner. If it is determined that the disc is not loaded in the predetermined manner, such as when there is no disc on the tray, the process proceeds to step S15 and the CD-RO
An error message is generated by M drive. This error message is transmitted to the OS of the computer device (step S16), and a series of processing is terminated.

On the other hand, if it is determined in step S14 that the disc is in the tray and the disc is loaded in the CD-ROM drive in the predetermined manner, the process proceeds to step S17. In step S17, the lead-in area of the loaded disc is accessed and the TOC is read. If the TOC cannot be read normally, the process proceeds to step S19, an error message is generated in the CD-ROM drive, and the process proceeds to step S16 described above.

On the other hand, if the TOC can be read normally in step S17, the process proceeds to step S18. In step S18, "Mode5" is added to the read TOC.
It is determined whether the information of is recorded. Young
At the first step S18 after the disc is loaded,
If the information of "Mode 5" is not recorded in the TOC, it is determined that the disc is a disc other than the CD extra, for example, a disc based on CD-DA, and the process proceeds to step S21.

On the other hand, if it is determined in step S18 that the information of "Mode 5" is recorded in the TOC, it is determined that the disc is a CD extra disc, and the process proceeds to step S20. In step S20, the track is jumped to the next session based on the start address of the next session recorded together in the TOC. Then, the process is the above-mentioned step S1.
Returned to 7, it is determined whether the TOC of the session could be read.

If it is determined in step S17 that the TOC has been read, then in step S18 the TOC is set to "M".
If it is determined that the information of "ode5" is not recorded,
This session is regarded as the final session of the disc, and the process proceeds to step S21. Step S
In 21, all TOCs read from the disc
The information is put together and the TOC is reconstructed using the put together information. Then, the process proceeds to step S22, and waits until the next instruction is input from the OS of the computer device.

In step S23, for example, when reproduction is instructed from the computer device, reproduction of the disc loaded in the CD-ROM drive is started, and reading of data recorded on the disc is started. In the next step S24, it is determined whether or not an error has occurred in reading the data. If it is determined that an error has occurred, the process proceeds to step S16, and an error message corresponding to the generated error is transmitted to the OS of the computer device.

If no error has occurred during the reproduction of the disc, the reproduction is continued up to, for example, the lead-out area based on the instruction from the OS in step S26. Of course, the reproduction can be interrupted midway according to an instruction from the OS. When the lead-out area is reproduced, the process proceeds to step S27, the reproduction of the disc is stopped, and the series of processes is ended. After the processing of step S27, the processing may be returned to step S22 to wait for input from the OS.

Similarly, in the above description, the error message is transmitted to the OS in step S16 and the series of processes is terminated, but this is not limited to this example, and step S1
After the process of 6, the process may be returned to step S22 to wait for the next instruction from the OS of the computer.

In the flowchart shown in FIG. 5, the loop processing of steps S17, S18 and S20, and step S21 are the TOC reading routine.

In response to the operation of the CD-ROM drive, the music CD according to the embodiment of the present invention is a CD-CD.
Consider the case where it is loaded into a ROM drive. In the TOC reading process by the TOC reading routine described above, in the first TOC reading process after the disc is loaded, if the TOC is normally read in step S17, the information of "Mode 5" in the TOC information is detected,
The process proceeds to step S20 according to the determination in step S18.

However, as described above, the start address of the next session indicated together with the designation of "Mode 5" is recorded on this music CD so that the normal access based on the start address becomes impossible. Therefore, the TOC cannot be read when the process proceeds from step S18 to step S20, and the process proceeds to step S19 by the determination of the subsequent step S17, which is an error. Therefore, the processes in and after step S21 are not performed, and the CD-ROM drive cannot reproduce the music CD according to the embodiment of the present invention.

FIG. 6 is a flow chart showing the operation of an example of a general CD player for reproducing music. In FIG. 6, when the user presses the loading button provided on the CD player to open and close the disc loading tray in the first step S30, the tray is opened and the disc is loaded in the next step S31. It is made possible. When the tray is opened, the user loads a disc, for example, the loading button is pressed again (step S32), and the tray is closed (step S).
33).

When the tray is closed, the next step S3
At 4, it is judged whether or not a disc is loaded in a drive in the CD player in a predetermined manner. If it is determined that the disc is not loaded as prescribed, for example, there is no disc on the tray, the process proceeds to step S35, and the drive generates an error message. This error message is transmitted to, for example, the control unit of the CD player, and C
This is displayed on the display provided in the D player (step S36), and a series of processing is ended.

On the other hand, if it is determined in step S34 that there is a disc in the tray and the disc is loaded in the drive in the predetermined manner, the process proceeds to step S37. In step S37, the lead-in area of the loaded disc is accessed and the TOC is read.
If the loaded disc is a multi-session disc such as a CD extra, the TOC of the first session is read. If the TOC cannot be read normally, the process proceeds to step S38, an error message is generated in the drive, and the process proceeds to step S36 described above.

On the other hand, if the TOC is normally read in step S37, the process proceeds to step S39 to wait for the user's input to the CD player. Then, for example, when the play button for instructing reproduction of the disc is pressed (step S40), reproduction of the disc loaded in the CD player is started in accordance with the instruction,
The reading of the music data recorded as a music track on the disc is started.

In the next step S41, it is determined whether or not an error has occurred in reading the data. If it is determined that an error has occurred, the process proceeds to step S36, and an error message corresponding to the generated error is transmitted to the control unit of the CD player,
The display will indicate that.

If no error has occurred during the reproduction of the disc, the reproduction is continued up to, for example, the lead-out area in step S43. Of course, the reproduction may be interrupted midway based on the user's instruction to the CD player. When the data is reproduced up to the lead-out area, the process proceeds to step S44, the reproduction of the disc is stopped, and the series of processes is ended. After the processing of step S44, the processing may be returned to step S39 to wait for the user's input to the CD player.

Similarly, in the above description, the error message is transmitted to the control unit of the CD player in step S36 and the series of processes is terminated, but this is not limited to this example, and the process is performed after the process of step S36. May be returned to step S39 to wait for the user's next input to the CD player.

In the flowchart shown in FIG. 6, step S37 is the TOC reading routine.

For the operation of such a CD player,
Consider a case where a music CD according to the embodiment of the present invention is loaded in a CD player. A general CD player can reproduce only a session in which a music track is recorded.
"de5" is ignored. Therefore, as shown in FIG. 6, the disc is loaded in the drive, and step S3 is performed.
After the TOC is read in step 7, there is no operation to read the next TOC based on the contents recorded in the TOC.

Therefore, in a general CD player,
Even when the music CD according to the embodiment of the present invention is loaded in the drive, no error occurs when reading the TOC of the second session in the TOC reading routine, unlike the CD-ROM drive described in FIG. . That is, in a general CD player, the music CD according to the embodiment of the present invention is converted into a general music CD (CD-DA).
It can be played in the same way as.

[0082]

As described above, according to the present invention, C
Information of "Mode 5" used in the CD extra, which is a multi-session format, is recorded on the TOC of the disc in the D-DA format. In addition, the start address of the next session accessed based on the information of “Mode 5” is described so that the next session cannot be accessed.

Therefore, when trying to reproduce this disc by a CD-ROM drive, a DVD-ROM drive, or a CD-R / RW drive, the next session is based on the information of "Mode 5" read at the time of the first TOC access. When I try to access the start address of, it becomes inaccessible and an error occurs. On the other hand, a general CD player does not need to access the next session because only the data recorded on the music track is used. Therefore, the information of "Mode 5" is ignored, and the disc according to the present invention can be reproduced normally.

Therefore, by using the present invention, C
D-ROM drive, DVD-ROM drive, CD-
There is an effect that a disc that cannot be played back by an R / RW drive and that can be played back by a general CD player can be easily produced.

Further, by using the disc to which the present invention is applied, it is possible to prevent the music data recorded on the disc from being copied by the computer device by the CD-ROM or the DVD-ROM. effective.

[Brief description of drawings]

FIG. 1 is a schematic diagram schematically showing a layout of a CD-DA on a disc.

FIG. 2 is a schematic diagram showing a TOC format.

FIG. 3 is a schematic diagram schematically showing a layout on a disc in a CD extra.

FIG. 4 is a schematic diagram showing a format of a subcode Q channel in a lead-out area in “Mode 5”.

FIG. 5 is a flowchart showing an operation of an example of a CD-ROM drive.

FIG. 6 is a flowchart showing an operation of an example of a general CD player for playing music.

[Explanation of symbols]

S17 ... Process for determining whether TOC can be read from the disc, S18 ... Process for determining whether or not there is information of “Mode 5” in the TOC, S20 ... Process for jumping to the next TOC position , S21 ... all TOCs
Processing to reconstruct the TOC, S37 ... Judgment whether the TOC of the first session could be read

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 5D029 PA01                 5D044 AB05 BC03 CC06 DE12 DE38                       DE39 DE53 EF05 FG18 GK12                       HH15 HL08                 5D090 AA01 BB02 CC04 CC14 DD03                       DD05 FF09 GG17 GG27

Claims (11)

[Claims] 1. A second medium for a drive device having a function of accessing a second region arranged after a first region in which a music track is recorded, in a recording medium compatible with a compact disc standard. Is recorded in the management area of the first area, and information for instructing access to a position where normal access is not possible is recorded as the information for instructing access. recoding media. 2. The recording medium according to claim 1, wherein only the first area is recorded. 3. The recording medium according to claim 1, wherein the management area of the first area is an area that is first accessed when the recording medium is loaded in a drive device. recoding media. 4. The recording medium according to claim 1, wherein time information indicating an absolute time that does not exist on the recording medium is recorded as the information for instructing the access. 5. The recording medium according to claim 4, wherein the time information indicating the nonexistent absolute time is time information indicating a negative time. 6. The recording medium according to claim 1, wherein the second area is provided in a state where normal access cannot be performed. 7. The recording medium according to claim 6, wherein the second area is provided with a mirror-state area in which no pit is formed at least at a start position of the second area. recoding media. 8. The recording medium according to claim 6, wherein the second area is provided as an area where an image is formed by a pit and a mirror area where the pit is not formed. . 9. The recording medium according to claim 1, wherein, as the information for instructing the access, information for instructing access to the management area of the first area is recorded. 10. A copy protection method for preventing copying of data recorded on a recording medium conforming to the compact disc standard, wherein a second area arranged after the first area where a music track is recorded is accessed. Information for instructing a drive device having a function to access the second area is recorded in the management area of the first area, and as information instructing the access, access to a position where normal access cannot be performed is recorded. By recording the information instructing to the recording medium,
A copy prevention method, characterized in that the data recorded on the recording medium is prevented from being copied using the drive device. 11. A method for recording on a recording medium compatible with the compact disc standard, comprising:
The information for instructing the drive device having the function of accessing the second area arranged after the first area in which the music track is recorded to access the second area is the management of the first area. A recording method characterized in that information for instructing access to a position where normal access is not possible is recorded as information for instructing the access, which is recorded in an area.