JP2005251261A - Writing program for recording medium, recording medium recorded with the program, and writing system for recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a writing program for a recording medium by which illegal copying into another recording medium can be prevented without applying any excessive loads to a reader of the recording medium by complying with a specification for every recording medium. <P>SOLUTION: In the writing program 32 for recording computer data and audio data in a recording medium 1, the audio data where the pregap length of at least one piece of music of the audio data is forcibly set longer than prescribed time, and the computer data containing user data are written in the recording medium. When the user data is executed, determination is made as to whether the length of the pregap of the recording medium recording the user data and the forcibly set pregap length match each other or not. When they are matched with each other, the user data is executed. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a writing program for recording audio data and computer data on one recording medium, a recording medium on which the writing program is recorded, and a writing system for the recording medium.

  With the spread of personal computers today, computer data such as application programs, search databases, document data, and audio data (music data) are recorded on recording media such as flexible disks, hard disks, compact disks, and DVDs. It is used. However, since illegal copy prevention technology for data recorded on recording media may not be incorporated into the standard for each recording medium, it is necessary to develop new technology to prevent unauthorized copying depending on the recording media. There was sex.

  For example, in order to prevent unauthorized copying of audio data recorded on a CD-DA (audio CD), an unauthorized copy prevention technology called “Cactus Data Shield” of Midbar is used, and a regular CD (CD-DA The audio data recorded in (1) is prevented from being copied to a recording medium such as a CD-R.

Further, as a measure for preventing unauthorized copying of the application program, a recording medium is provided with a defective portion where data cannot be read normally, and the application program and a preceding program that operates before the application program operates are recorded on the recording medium. There is a technology to record This is because the defective part is provided in the recording area of the application program, and the preceding program is operated by including information on the location of the part to be read of the application program not including the defective part in the preceding program. When the application program is read, the application program can be operated by reading the data in the area where the application program is recorded without reading the defective part, but when copying to another recording medium using the copy command In this case, the defective portion cannot be read, and unauthorized copying of the application program is prevented (see, for example, Patent Document 1).
JP 2000-348435 A

  However, Midbar's “Cactus Data Shield” technology does not conform to the Red Book standard, which is a CD-DA (audio CD) standard. It is known that the sound quality of the audio data to be reproduced deteriorates due to an excessive load, and this is not a satisfactory technique for a user who wants to reproduce music with high sound quality. In addition, even a specific CD player may not be able to reproduce the content, which places a burden on the user.

  On the other hand, as a measure for preventing unauthorized copying described in Patent Document 1, it is a technique for an application program written on a recording medium, and is used for data such as document data, a database, and image data created by an application program. Could not be implemented as a preventive measure against unauthorized copying. Further, since it was not a technology that complies with the Yellow Book (Yellow Book) standard, which is a CD-ROM standard, the load on the reading device (for example, a CD drive) has been similarly increased.

  In view of such a problem, the present invention obeys the standard for each recording medium, and does not impose an excessive load on the reading device (player, drive) of the recording medium and prevents unauthorized copying to other recording media. An object of the present invention is to provide a program for writing to a recordable medium.

A program for writing to a recording medium according to the present invention is a writing program for recording computer data and audio data on a recording medium, and an audio data reading means for reading audio data to be recorded on the recording medium A pre-gap setting unit for forcibly setting a pre-gap length of at least the first song in the audio data read by the audio data reading unit to a time longer than a specified time; User data reading means for reading user data to be recorded on a recording medium, computer data creation means for creating computer data including user data read by the user data reading means, and the pregap setting means. The computer data created by the computer data creation means and the computer function as a recording medium writing means for writing the recorded audio data and the computer data created by the computer data creation means to the recording medium Includes a pre-gap storage unit that stores a pre-gap length set by the pre-gap setting unit when execution of the user data is started, and a pre-gap length stored in the pre-gap storage unit And the pregap judging means for judging whether or not the length of the pregap of the first song in the audio data of the recording medium on which the computer data is recorded is the same by the pregap judging means. If it is determined that Wherein the determination program data for causing a computer to function as the user data execution start means for starting the execution of the user data is constituted contains contained in metadata.
Also, a writing system for recording computer data and audio data on a recording medium, the audio data reading means for reading the audio data to be recorded on the recording medium, and the audio read by the audio data reading means Pre-gap setting means for forcibly setting the length of the pre-gap of at least the first song in the data to a time longer than a prescribed time, and a user reading user data that the user intends to record on the recording medium Data reading means, computer data creating means for creating computer data including user data read by the user data reading means, audio data set by the pre-gap setting means, and the computer data At least recording medium writing means for writing the computer data created by the creating means to the recording medium, and the computer data created by the computer data creating means starts execution of the user data Sometimes, a pre-gap storage means for storing the length of the pre-gap set by the pre-gap setting means, a pre-gap length stored in the pre-gap storage means, and a record in which the computer data is recorded When it is determined by the pre-gap determining means that the pre-gap determining means for determining whether or not the pre-gap length of the first song in the audio data of the medium is the same, the computer User data that starts executing user data included in the data May write system including includes determining program data for causing a computer to function as the line starting means.

Therefore, the recording medium in which the length of the pre-gap of the first song of the audio data created using the program for writing to the recording medium and the system for writing to the recording medium is set longer than the specified time is almost all Since the recording medium cannot be duplicated in the environment, unauthorized copying can be prevented.
In addition, since the recording method conforms to the standard of the recording medium, no load is applied to the playback apparatus (player, drive), sound quality is not deteriorated, and playback and reading cannot be performed with a specific playback apparatus. .
Further, even when the data on the recording medium can be duplicated, the length of the pre-gap of the first song of the audio data is different, so this difference is discriminated to determine whether or not it is a regular recording medium. Since it can be determined whether or not to start data execution, unauthorized copying of user data can be prevented.

  Further, the computer data creation means includes an encryption unit that encrypts the user data, and combines the user data encrypted by the encryption unit and the determination program as one program file, The user data execution unit may include a decryption unit that decrypts the user data encrypted by the encryption unit, and may start executing the user data decrypted by the decryption unit.

  The length of the pre-gap that is forcibly set by the pre-gap setting means may be set to 20 seconds.

  The recording medium includes a recording area in a rotatable disk-shaped member, and the recording medium writing means writes the audio data in an inner peripheral portion of the recording area and writes the computer data in an outer peripheral portion. Alternatively, the computer data may be written in the inner peripheral portion of the recording area, and the audio data may be written in the outer peripheral portion.

  Further, the recording medium may be recorded on one of a CD-R and a CD-RW.

  Further, the determination program includes: ATIP data storage means for storing normal ATIP data included in a normal recording medium; and a recording medium on which the normal ATIP data recorded in the ATIP data storage means is recorded. A program that causes a computer to function as ATIP data determination means for determining whether or not the ATIP data provided is the same, and wherein the computer data execution means has the same determination result by the pregap determination means and the ATIP When it is determined that the determination results by the data determination means are the same, execution may be started on the computer data.

  The program for writing to the recording medium may be recorded on a computer-readable recording medium.

The recording medium writing program and the recording medium writing system according to the present invention set most pre-gap lengths of the first piece of audio data longer than a prescribed length, so that most reading devices (players, Drive) and writing software can create a recording medium that cannot be copied to another recording medium.
Further, even if recording can be performed on another recording medium by using a specific reading device (player, drive) and writing software, the length of the pre-gap of the copy source and one of the audio data of the copy destination Since the pre-gap length of the music is different, the duplication destination recording medium and the duplication source (regular) recording medium do not completely match. Since it is possible to determine whether the discrepancy is a legitimate recording medium or a duplicating recording medium based on the judgment program data, the user data can be executed only when the disc is a legitimate recording medium. Unauthorized copying can be prevented.
Furthermore, since the recording method conforms to the standard of the recording medium, no load is applied to the playback device (player, drive), sound quality is not deteriorated, and playback and reading cannot be performed with a specific playback device. .
That is, the program for writing to the recording medium and the recording medium created by the writing system according to the present invention cannot be illegally copied. Even if unauthorized copying is possible, the recorded user data cannot be executed, so that the user data is not illegally copied and leaked.

  In addition, user data is encrypted when recording on a recording medium, and the encrypted user data is decrypted when the execution of the user data is started. Security can be improved.

In addition, since a recording medium such as a CD-R or CD-RW is used as the recording medium, additional recording such as a CD-R is required when creating a small number of user data (about 1, 2 to several tens). Since data can be written on a possible recording medium, a recording medium that cannot be copied at low cost can be created.
That is, user data created by an individual can be recorded on a recording medium at a low cost and equipped with a technology for preventing unauthorized copying.

  Further, when the recording medium to be recorded on the recording medium and the recording system is a CD-R or CD-RW, the ATIP data included in the regular recording medium and the ATIP of the recording medium on which the user data is recorded Compared with the data, it is determined whether or not the data is recorded in the same product of the same manufacturer, so that it is possible to provide a more robust technology for preventing unauthorized copying.

  Further, a program for writing to a recording medium can be recorded on a recording medium such as a CD-ROM and sold.

The audio data in the present invention refers to digitized audio data (music data) and does not include data in an analog data format. A specific example of the audio data is data (audio data) recorded in a CD-DA (Compact Disk Digital Audio) format defined in the Red Book (Red Book) standard. If so, audio data recorded by other methods (standards) may be used.
The user data in the present invention refers to digitized data that can be read by a computer, such as application program data (game program, word processor program, etc.) operable on the computer, created by the application program, or The readable file data (document data, image data, moving image data, database data, etc.) is shown. Further, the audio data is not included in the user data.
In addition, as shown in FIG. 3, the computer data 5 indicates data including at least the user data 31 and determination program data 30 described later. That is, one file of computer data 5 includes at least one user data 31 and at least one determination program data 30. Further, as will be described later, the user data 31 included in the computer data 5 is not started directly by the user operating the computer, and the determination program data 30 executes the user data 31. Judgment is made and execution is started based on the judgment.

As shown in FIGS. 1 and 2, the audio data recording area 3 is an area for recording the audio data. For reading the audio data 6, the audio data recording area 3 is used for control defined by the standard for each recording medium. This is an area in which data such as pre-gap 4 corresponding to data and audio data is recorded.
Similarly, the computer data recording area 2 is an area for recording the computer data 5 as shown in FIGS. 1 and 2, and is defined by the standard for each recording medium for reading the computer data 5. This is an area where data such as pre-gap 4 corresponding to the control data and the computer data is recorded.

In the embodiment shown below, as shown in FIG. 1, the audio data 6 and the computer data 5 are recorded on a CD (CD-ROM, CD) recorded in the Mixed Mode defined in the Yellow Book standard. -R, CD-RW) 1 recording method (recording structure) will be described.
As shown in FIGS. 1 and 2, the Mixed Mode defined in the Yellow Book standard is a first track in one session of a CD (CD-ROM, CD-R, CD-RW) 1 as a recording medium. The computer data 5 is recorded on the (inner periphery side portion) 2, and the audio data (CD-DA data) 6 is recorded on the second track (outer periphery side portion) 3.
As a method for recording both the audio data 6 and the computer data 5 on one recording medium, the computer data 5 is placed on the inner peripheral side portion 2 of the recording area of the disc-like member 1 and the outer peripheral side, as in Mixed Mode. A method of recording the audio data 6 in the portion 3, a method of recording the audio data 6 in the inner peripheral portion 2 of the recording area of the disc-shaped member 1, and the computer data 5 in the outer peripheral portion 3; There is a method of alternately recording audio data 6 and computer data 5 in a recording area.

  In the Red Book standard, the length of the pregap 4 provided at a position before the start position of the audio data is defined to be set to a length of 2 seconds or more. The pre-gap 4 is set between music pieces as in the first and second music pieces of audio data. In addition, for example, when the second song is played after the first song on the CD player, the pre-gap data provided in front of the second song can be played, but the second song is directly designated. Since the second piece of audio data is reproduced without reproducing the pre-gap portion, it is normally set to 2 seconds, which is the minimum time (specified time) of the pre-gap 4.

  FIG. 1 shows a mixed mode CD 1 defined in the Yellow Book standard. A computer data recording area 2 in which the computer data 5 is recorded on an inner peripheral portion (first track) 2 and an outer peripheral portion (second track). 3 includes an audio data recording area 3 in which the audio data 6 is recorded, a lead-in area (not shown), and a lead-out area (not shown). The computer data recording area 2 and the audio data recording area 3 are respectively provided with pre-gap 4 and 4.

  Normally, the length of the pre-gap 4 set in the computer data recording area 2 and the audio data recording area 3 is set to 2 seconds, which is the minimum time defined in the Red Book standard, as shown in FIG. However, in the recording medium according to the present invention, as shown in FIG. 2 (b), the length of the pre-gap 4a of the first song of the audio data recorded in the audio data recording area 3 is defined from 2 seconds. Also set a long time. In FIG. 2, only one song is recorded as the audio data 6, but two or more pieces of audio data 6 may be recorded. FIG. 1 illustrates the concept of the computer data recording area 2 and the audio data recording area 3, and does not limit the area of the recording area of each area. The data recording area 2 may occupy and the remaining area may be occupied by the audio data recording area 3, or vice versa. Further, the data may not be recorded in the entire recording area of the recording medium 1.

  Next, the pre-gap 4a of the first piece of audio data in the CD-DA format recorded on the CD (CD-ROM, CD-R, CD-RW) 1 recorded in the Mixed Mode defined in the Yellow Book standard. An experiment was conducted as to whether or not the data of the CD1 could be completely copied to a CD-R which is another recording medium when the length was set to 20 seconds.

  The environment in which the CD1 was copied with the pre-gap 4a length set to 20 seconds is as shown in Table 1, OS (operating system), CD drive (reading data from the copy source CD1, and copy destination “Disk At Once” in an environment that combines writing software (software that writes data to the copy destination CD-R) and writing software (drive that writes data to the CD-R) The recording method was checked to see if a completely consistent copy was possible.

  As a result of the experiment, writing was not possible on the copy destination CD-R (other CD-R) except for the combination of OS, CD drive, and writing software shown in Table 2, and the experiment was terminated. The reason why the writing could not be performed is that the length of the pre-gap 4 is set to a very long time compared to the normal setting time (specified time). It seems that writing to the copy destination CD-R was not performed.

  In the CD-R copied in the environment shown in Table 2, the length of the pre-gap 4a of the first song of the audio data 6 was automatically changed from 20 seconds to 2 seconds. Specifically, the copy source CD 1 was recorded with the structure shown in FIG. 2B, but the copy destination CD-R was recorded with the structure shown in FIG. In other words, even if CD1 was copied in the environment shown in Table 2, the CDs did not completely match.

From the above, the CD 1 recorded with the length of the pre-gap 4 set to a longer time (for example, 20 seconds) than a prescribed time (for example, 2 seconds) is recorded in other CD-Rs in most environments. Therefore, it is possible to prevent illegal copying of the audio data 6 and computer data 5 recorded on a regular CD (CD-ROM, CD-R, CD-RW).
In addition, although some CD drives and writing software can copy to other CD-Rs, the length of the pre-gap 4 (4a) of the first song of the audio data is arbitrarily changed to match. Because there is no such thing, complete illegal copying is not possible.
In other words, CD1 in which the length of the pre-gap of the first piece of audio data is set longer than the prescribed length cannot make a completely identical copy.
Further, by detecting the difference in the pre-gap 4a (4) between the regular CD and the illegal CD, it can be used as an identification element for identifying whether the CD is a regular CD or an illegally copied CD.

  In the above experiment, the CD is used as a recording medium, and an experiment is performed as to whether or not a complete copy can be made from a regular CD. However, other recording media such as a DVD may be used.

  Next, to the recording medium for creating a CD (CD-ROM, CD-R, CD-RW) in which the pre-gap 4 of the first song of the audio data shown in the first embodiment is set longer than the specified time. The writing program will be described.

  A program for writing to the recording medium (hereinafter referred to as a writing program) 32 (see FIG. 4) is installed in the computer 14 and functions as a system for writing to the recording medium 1 as shown in FIG. It is a program. Further, a drive 15 for writing the computer data 5 and the audio data 6 to the recording medium 1 is connected to the computer 14 by a communication cable 16. The drive 15 may also serve as audio data reading means 34 (see FIG. 4) for reading audio data and user data reading means 37 (see FIG. 4) for reading computer data.

    The writing program 32 for writing (recording) the audio data 6 and the computer data 5 including the user data 31 on the recording medium 1 according to the present invention is an audio program as shown in FIGS. Audio data reading means 34 for reading the audio data 6 recorded in the data recording means 33, pre-gap setting means 35, user data reading means 37 for reading the user data 31 recorded in the user data recording means 36, This is a program that causes computer data to function as the determination program data storage means 38, the computer data creation means 39, and the recording medium writing means 40.

  The audio data recording means 33 is means for recording the audio data 6, and specifically is a recording medium such as a CD-DA, DVD, HDD or the like.

As shown in FIG. 4, the audio data reading means 34 is means for reading the audio data 6 recorded in the audio data recording means 33 such as a CD-DA or HDD. If data format conversion from the data format of the read audio data 6 to a data format for recording on the recording medium 1 is necessary, an audio data conversion unit (not shown) that performs this data format conversion is connected to the audio. The data recording means 33 may be provided and converted to a data format for recording on the recording medium 1. The audio data conversion unit may have a function of digitally converting analog audio data using the PCM method.
As the audio data 6 read by the audio data reading means 34, the audio data 6 designated by the user who operates the writing program 32 is read. The writing data 32 is provided with the audio data recording means 33. Alternatively, the predetermined audio data 6 may be automatically read.

As shown in FIG. 4, the pre-gap setting unit 35 is defined with the length of the pre-gap 4 of the audio data set to the first song among the audio data 6 read by the audio data reading unit 34. It is means for forcibly setting a time longer than the time (for example, when the specified time is 2 seconds, it is longer than 20 seconds). More specifically, data relating to the audio data 6 of the first song is found from the data of a cue sheet used when recording on the recording medium 1. When the pregap 4 is set, the length is changed (for example, changed to 20 seconds). When the pregap is not originally set, the pregap is set longer than the specified length. (E.g., set to 20 seconds), the cue sheet data is rewritten so that the pregap is longer than the time defined as the pregap 4a shown in FIG.
Note that the length of the pre-gap 4a to be forcibly rewritten may be set to a preset fixed length (for example, 20 seconds), or the user can freely set the length. Good. At this time, the pre-gap setting unit 35 sends an output signal to the judgment program data storage unit 38 to notify the length of the pre-gap stored in the pre-gap storage unit 41, which will be described later. The length of the pre-gap of the recording medium is stored.
The pre-gap setting means 35 may be set to record specific data in the pre-gap recording area in which the pre-gap length is set in addition to the pre-gap length.
If the length of the pregap can be set by the user, the maximum pregap time is calculated based on the recording capacity of the recording medium, the volume of audio data, and the capacity of computer data, and is shorter than the maximum time. The user may be prompted to set a pregap.

  The user data recording means 36 is means for recording the user data 31, and is specifically a recording medium such as a CD-ROM, DVD-ROM, HDD, flexible disk or the like.

As shown in FIG. 4, the user data reading means 37 is means for reading user data 31 recorded in user data recording means 36 such as a CD-ROM, DVD-ROM, or HDD.
As the user data 31 read by the user data reading means 37, the user data 31 specified by the user who operates the writing program 32 is read. The writing data 32 is provided with the user data recording means 36. Alternatively, predetermined computer data 5 may be read.

  The judgment program data storage means 38 is means for recording the judgment program data 30 as shown in FIGS. 3 and 4, and the judgment program data 30 is written into the recording medium 1 and then the user data. This is data of a program executed prior to the execution of 31.

As shown in FIG. 4, the computer data creation means 39 combines the user data 31 read by the user data reading means 37 and the judgment program data 30 stored in the judgment program data storage means 38. As shown in FIG. 3, this is means for creating computer data 5 of one file. The computer data creation means 39 not only combines the user data 31 and the judgment program data 30 into one file, but also executes the user data 31 by using the judgment program data 30 when the user data 31 is executed. This is means for enabling the user data 31 to be executed based on the determination of whether or not to start the execution.
It should be noted that an encryption unit for encrypting the user data 31 is provided in the computer data creation means 39 so that the user data 31 is encrypted and decrypted by the user data execution start means 43 included in the determination program data 30. May be provided so that the user cannot directly start the execution of the user data 31.
The user data 31 included in the computer data 5 may be one data, but two or more data may be included.

  As shown in FIG. 4, the recording medium writing means 40 includes audio data in which the length of the pregap is set long by the pregap setting means 35, computer data 5 created by the computer data creating means 39, and Is a means for writing to the recording medium 1. When writing to the CD-R (which may be another recording medium such as a CD-RW) as the recording medium 1 in the Mixed Mode defined in the Yellow Book standard, it is shown in FIG. As described above, the lead-in data is written from the inner peripheral portion of the CD-R, the pre-gap 4, the computer data 5, the pre-gap 4a, and the audio data 6 are continuously written, and the lead-out data is finally written. Control the device.

  When the writing program 32 that causes the computer to function as each means is executed, the selection screen 17 shown in FIG. 6 is displayed on the display of the computer 14. The operator can select each of user data 31 and audio data 6 to be recorded on the recording medium 1 by operating the selection screen 17. The upper left window 18 of the selection screen 17 displays a folder recorded in the computer 14 (see FIG. 5), and files 22 and folders 26 in the folder selected by the operator from among the folders are displayed on the upper right. Are displayed in the window 19. On the other hand, in the lower left window 20, a folder 23 indicating the computer data recording area 2 and a folder 24 indicating the audio data recording area 3 of the recording medium (CD) are displayed. In FIG. 6, the folder 23 is selected, and user data 31 to be recorded in the computer data recording area 2 is displayed in the lower right window 21. The lower right window 21 in FIG. 6 shows a state where user data 31 having a file name “Readme.doc” is selected. Similarly, when selecting audio data to be recorded, after selecting the folder 24 in the lower left window 20, drag and drop the audio data file displayed in the upper right window 19 to the lower right window 21. To select. Then, the operator who has selected both the user data 31 and the audio data presses the write start button 25, and the recording medium 1 in which the computer 14 (see FIG. 5) is inserted in the drive 15 (see FIG. 5). (See FIG. 5) Both selected computer data and audio data are written (recorded).

The recording medium for writing may be a recording medium such as CD-ROM and DVD-ROM which cannot be additionally recorded or rewritten, but CD-R, CD-RW, DVD-R, DVD + R, DVD- A recording medium capable of additional recording or rewritable recording such as RW, DVD + RW, and DVD-RAM may be used. In particular, when creating a small number of recording media (1, 2 to several tens), additional recording such as a CD-R is required as compared to a CD-ROM that must produce a large number of recording media at one time. Since data can be written on a possible recording medium, a recording medium that cannot be copied at low cost can be created.
That is, music and computer programs created by individuals can be easily recorded on a CD-R, and the data can be used as a recording medium that cannot be illegally copied.

  It should be noted that audio data and computer data to be recorded on a recording medium must be recorded as data that does not infringe on the copyrights of others, such as music and computer programs created by a person who records on the recording medium. That is.

As described above, by executing the writing program 32 by a computer, it is possible to create a recording medium having a long pre-gap length of the first piece of audio data. That is, as shown in the first embodiment, even if copying is performed, a recording medium that cannot be copied in the same recording state (recording structure) as the copy source can be created.
The recorded CD-R created by executing the writing program 32 by a computer only has a long pre-gap length, and is a Mixed Mode standard defined in the Yellow Book standard. Therefore, the CD player or the like is not burdened and the sound quality of the music to be played is not reduced. In addition, there is no problem that it cannot be played back by a specific CD player.

  Further, the writing program 32 is recorded on a computer-readable recording medium such as a CD-ROM or DVD-ROM and sold, and the purchaser uses the writing program 32 to store audio data and user data. It is possible to write on an additional recordable recording medium. The written audio data and user data cannot be illegally copied.

  Next, the determination program data 30 when executing the user data 31 (computer data 5) written in the recording medium 1 by the writing program 32 will be described.

  As shown in FIG. 7, the determination program data 30 is a program that causes a computer 46 to function as a pre-gap storage unit 41, a pre-gap determination unit 42, and a user data execution start unit 43. When the recording medium written by the writing program 32 includes ATIP (Absolute Time In Pregroove) data such as CD-R and CD-RW, the determination program data 30 is stored in the ATIP data storage. The means 44 and the ATIP data determination means 45 may be a program that causes the computer 46 to function.

  The pregap storage means 41 is means for storing the length of the pregap set by the pregap setting means 35 as shown in FIG. When the pregap length set by the pregap setting unit 35 is set to a preset length, the pregap length is stored in the unit. When the pregap length set by the pregap setting unit 35 can be changed by the user, when the pregap length is set, the pregap setting unit 35 It is means for storing the length of the set pre-gap based on the output signal.

As shown in FIG. 7, the pre-gap determination means 42 determines whether or not the audio data 6 is recorded in a recording medium on which the determination program data 30 including itself is recorded. 6 is recorded, it is determined whether the pre-gap length of the first song of the audio data 6 and the pre-gap length stored in the pre-gap storage means 41 are the same. It is means to do. If the pregap judging means 42 has different pregap lengths or the audio data 6 is not recorded on the recording medium on which the self gap is recorded, a dialog to that effect is displayed on the computer 46 screen. Display to inform that the execution of user data cannot be started.
Note that the length of the pre-gap of the first song of the audio data 6 in the recording medium is considered in consideration of variations in device performance of a reading device (for example, a CD drive) that reads the computer data 5 recorded on the recording medium. The acquisition process may be repeated a plurality of times (for example, 10 times), and the subsequent processes may be interrupted only when the pregap lengths do not match or cannot be acquired.

  The user data execution start unit 43 executes the user data 31 corresponding to the determination program data 30 including itself when the pregap determination unit 42 determines that the pregap length is the same. Start. If the user data 31 is encrypted when it is included in the computer data 5, the user data execution start means 43 is provided with a decryption unit (not shown) so that the encrypted user Data 31 is decrypted so that it can be executed.

  Starting the execution of the user data 31 by the user data execution start means 43 means that if the user data 31 is an application program such as a game program or an installation program, the program is executed by the computer 46. When the data 31 is data that can be used by another application program such as a document data file, a database, or image data, the user data 31 can be used (readable) and already installed in the computer 46 A program is executed to read the user data 31 from the application program.

  The ATIP data storage means 44 is means for recording the ATIP data of the recording medium 1 written by the recording medium writing means 40, as shown in FIG. It is means for recording ATIP data of the recording medium based on the output signal. The timing for storing the ATIP data in the ATIP data storage means 44 is as follows. When the computer data creation means 39 (see FIG. 4) creates the computer data, it reads the ATIP data of the recording medium to which it is written, The data is stored in the ATIP data storage means 44.

As shown in FIG. 7, the ATIP data determination means 45 acquires ATIP data of a recording medium on which the determination program data 30 including itself is recorded, and when the ATIP data can be acquired, the ATIP data It is means for judging whether or not the data and the ATIP data stored in the ATIP data storage means are the same. When the ATIP data is the same as the ATIP data recorded in the ATIP data storage unit 44, a signal is output to the user data execution start unit 43. The user data execution start means 43 that has received the signal only stores the user data 31 only when the pregap is the same by the pregap judgment means 42 and the ATIP data is the same by the ATIP data judgment means. Start execution.
If ATIP data cannot be acquired or the ATIP data is different, a dialog to that effect is displayed on the screen of the computer 46 to inform the user that execution of user data cannot be started.
In addition, as a criterion for determining whether or not the pre-gap is the same, whether or not both pre-gap lengths are completely the same is used as a criterion, or recording is performed in an area specified by the pre-gap. In some cases, whether the pre-gap is the same or not may be determined based on either one of the criteria. Based on the determination criteria, it is possible to obtain a more robust illegal copy prevention technique when the pre-gap is the same only when it is determined that both criteria are the same.

  Hereinafter, the process of the judgment program data 30 when starting execution of user data from a CD (recording medium) 1 on which user data has been written (recorded) by the writing program and writing system according to the present invention will be described. This will be described with reference to the block diagram of FIG. 7 and the flowchart of FIG.

  First, a recording medium (CD) in which user data is recorded is inserted into a reading device by the writing program 32, and computer data recorded on the recording medium (CD) is displayed on the computer 46. Then, the operator selects the computer data 5 to be executed from among the computer data 5 displayed in the list, and inputs an execution signal of the selected computer data 5 to the computer 46 (by performing an operation such as double clicking).

When the execution signal is input, the ATIP data determination means 45 determines whether or not ATIP data exists in the recording medium on which the computer data 5 is recorded (S50).
If the ATIP data does not exist, the process proceeds to error processing (S58). If the ATIP data exists, the ATIP data determination unit 45 acquires the ATIP data of the recording medium (S51).
When the ATIP data is acquired, the ATIP data determination unit 45 determines whether or not the acquired ATIP data and the ATIP data stored in the ATIP data storage unit 44 are the same ATIP data. (S52).
If the ATIP data determination unit 45 determines that the two ATIP data are not completely identical, the process proceeds to error processing (S58). If the ATIP data determination unit 45 determines that the ATIP data is completely identical, The gap determination means 42 determines whether or not the audio data recording area 3 (see FIG. 1) exists on the recording medium (S53).
If the audio data recording area 3 does not exist on the recording medium by the pregap determining means 42, the process proceeds to error processing (S58). If the audio data recording area 3 exists, the pregap determining means 42 Then, the pre-gap 4 (see FIG. 2) of the first song of the audio data in the audio data recording area 3 is acquired (S54).
Then, the pregap determining means 42 determines whether or not the acquired pregap length is the same as the pregap length stored in the pregap storage means 41 (S55).
If the pregap determination means 42 determines that the pregap is not the same, the process proceeds to error processing (S58). If it is determined that the pregap is the same, the user data execution start means 43 performs encryption. The converted user data 31 is decrypted (S56), and the process proceeds to a user data execution start (S57) described later. If the user data 31 is not encrypted, the decryption process is not performed, and the process proceeds to the execution start of the user data (S57). The process of starting the execution of user data (S57) is to execute the user data in cooperation with the user data and a program (for example, OS) installed in advance in the computer. If the user data is an application program, the application program is caused to function on the computer 46. If the user data is document data, image data, or the like, the application program already installed in the computer 46 is executed. The user data is read (executed).

  As the error process (S58), a dialog containing a message indicating that the selected computer data 5 cannot be executed is displayed on the screen of the computer 46.

Therefore, even if the computer data 5 (user data 31) recorded on the CD-R (recording medium) 1 is copied to another recording medium such as an HDD, it cannot be executed by the process of (S50) shown in FIG. . Even if copied to another CD-R, the computer data 5 (user data 31) cannot be executed by the process of (S52) in FIG. 8 if the manufacturer and product number are not the same. Further, if audio data is included in the recording medium and the length of the pre-gap of the first song is not the same, the computer data 5 (user data 31) is obtained by (S53) and (S55) in FIG. Cannot execute.
Further, as shown in (Embodiment 1) and (Embodiment 2), the recording medium written by the program for writing to the recording medium according to the present invention can not make a completely identical copy. Further, as shown in (Example 3), since it is determined whether or not the user data can be executed based on the components included in only the regular recording medium, the user data can be executed only from the regular recording medium. .
Further, since a CD-R or the like can be used as a regular recording medium, it is possible to obtain a recording medium that is reliably copy protected at low cost.

It is explanatory drawing of the recording medium which recorded computer data and audio data. FIG. 2A is an explanatory diagram when the length of the pre-gap of the first song of audio data is set to a prescribed length, and FIG. 2B is the diagram of the pre-gap of the first song of audio data. It is explanatory drawing when the length of is set longer than a prescribed length. It is explanatory drawing explaining the structure of computer data. It is a block diagram of the program for writing to a recording medium, and the writing system to a recording medium. It is a schematic diagram of a computer and a writing drive in which a program for writing to a recording medium is installed. It is explanatory drawing of the operation screen of the program for writing to a recording medium. It is a block diagram of a judgment program. It is a flowchart when making a computer function the judgment program recorded on the recording medium.

Explanation of symbols

1 Recording medium, disk-shaped member, CD
2 Computer data recording area, inner circumference side, first track 3 Audio data recording area, outer circumference side part, second track 4 Pregap 4a Pregap 5 Computer data 6 Audio data 14 Computer 15 Drive 16 Communication cable 17 Selection screen 18 Window 19 Window 20 Window 21 Window 22 File 23 Folder 24 Folder 25 Write start button 26 Folder 30 Judgment program data 31 User data 32 Program for writing 33 Audio data recording means 34 Audio data reading means 35 Pregap setting means 36 User data recording means 37 User data reading means 38 Judgment program data storage means 39 Computer data creation means 40 Recording Body writing means 41 Pregap storage unit 42 pre-gap determining means 43 the user data execution start unit 44 ATIP data storage means 45 ATIP data determination unit 46 computer

Claims (8)

In a writing program for recording computer data and audio data on a recording medium,
Audio data reading means for reading audio data to be recorded on the recording medium;
Pre-gap setting means for forcibly setting the length of the pre-gap of at least the first song in the audio data read by the audio data reading means to a time longer than a specified time;
User data reading means for reading user data scheduled to be recorded on the recording medium by a user;
Computer data creating means for creating computer data including user data read by the user data reading means;
Causing the computer to function as recording medium writing means for writing the audio data set by the pre-gap setting means and the computer data created by the computer data creating means to the recording medium;
The computer data created by the computer data creation means stores a pregap storage means for storing the length of the pregap set by the pregap setting means when the execution of the user data is started. Whether the length of the pre-gap stored in the pre-gap storage means and the length of the pre-gap of the first song in the audio data of the recording medium on which the computer data is recorded are the same. Judgment program data for causing a computer to function as user data execution starting means for starting execution of user data included in the computer data when the pregap determining means and the pregap determining means determine that they are the same. Included,
A program for writing to a recording medium. The computer data creation means includes an encryption unit that encrypts the user data, and combines the user data encrypted by the encryption unit and the determination program as one program file,
The said user data execution means is provided with the decoding part which decodes the user data encrypted by the said encryption part, and starts execution of the user data decoded by the said decoding part. Program for writing to other recording media.   3. The program for writing to a recording medium according to claim 1, wherein the length of the pre-gap forcibly set by the pre-gap setting means is set to 20 seconds. The recording medium comprises a recording area on a rotatable disk-shaped member,
The recording medium writing means includes
Writing the audio data in the inner peripheral portion of the recording area and writing the computer data in the outer peripheral portion;
The program for writing to a recording medium according to any one of claims 1 to 3, wherein the computer data is written in an inner peripheral portion of the recording area and the audio data is written in an outer peripheral portion.   The program for writing to a recording medium according to claim 4, wherein the recording medium is one of a CD-R and a CD-RW. The discrimination program includes ATIP data storage means for storing normal ATIP data provided in a normal recording medium, and ATIP data provided in a recording medium in which the normal ATIP data stored in the ATIP data storage means and itself are recorded. A program that causes a computer to function as ATIP data determination means for determining whether data is the same;
6. The computer data execution unit starts execution of the computer data when it is determined that the determination result by the pre-gap determination unit is the same and the determination result by the ATIP data determination unit is the same. A program for writing on the recording medium described.   A computer-readable recording medium on which the program for writing to the recording medium according to claim 1 is recorded. A writing system for recording computer data and audio data on a recording medium,
Audio data reading means for reading audio data to be recorded on the recording medium;
Pre-gap setting means for forcibly setting the length of the pre-gap of at least the first song in the audio data read by the audio data reading means to a time longer than a specified time;
User data reading means for reading user data scheduled to be recorded on the recording medium by a user;
Computer data creating means for creating computer data including user data read by the user data reading means;
The computer includes at least recording medium writing means for writing the audio data set by the pre-gap setting means and the computer data created by the computer data creating means to the recording medium,
The computer data created by the computer data creation means stores a pregap storage means for storing the length of the pregap set by the pregap setting means when the execution of the user data is started. Whether the length of the pre-gap stored in the pre-gap storage means and the length of the pre-gap of the first song in the audio data of the recording medium storing the computer data are the same. Judgment program data for causing a computer to function as user data execution starting means for starting execution of user data included in the computer data when the pregap determining means and the pregap determining means determine that they are the same. Included,
A writing system for recording media.

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