JPH08147766A - Optical disk and its checking device - Google Patents

Abstract

PURPOSE: To make it possible to utilize specific patterns for decision as to whether a normal disk or not by recording the appearance frequency and appearance sequence of a Q mode stored in a Q channel constituting sub-code data with specific patterns. CONSTITUTION: This optical disk is constituted (1) to record the appearance frequency and appearance sequence of the Q mode stored in the Q channel constituting the sub-code data with the specific patterns, (2) to set and record program search data stored in the P channel (CH) constituting the sub-code data (SD) at a specific value, (3) to record the appearance sequence of the control data stored in the QCH constituting the SD with specific patterns, (4) to record the appearance sequence of the specific bit in the control data stored in the QCH constituting the SD with specific patterns, (5) to record the number of the tracks and pointers in the Q data stored in the QCH constituting the SD in a lead-in region with specific sequence and (6) to set and record the actual reproduction time data of respective pieces of the track information constituting the SD with specific accuracy. The disk is decided to be the normal disk if the disk has these specific forms.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disc and a checking apparatus for the optical disc, which is adapted to prevent illegal copying on a CD-ROM or the like in which information such as a TV game is recorded.

[0002]

2. Description of the Related Art When music, images, characters, data, etc. are expressed as digital information signals, the information in terms of transmission characteristics is compared with the case where they are expressed as analog signals when the information is copied. There is no deterioration. For this reason, there is a big copyright problem at present, and it is required to prohibit or restrict copying the digital information signal as it is.

For example, a CD-ROM is "ISO96".
It is manufactured based on published standards such as "60". When copy protection is performed according to this standard, a copy protection code is recorded on the disc in advance. And if there is this code, it is a regular disc,
If there is no code, it is determined that the disc is an illegal copy disc, and measures such as stopping the reproduction are taken. It is considered that the CD-ROMs currently commercialized and those commercialized in the future will be in conformity with this standard.

However, with such a copy protection method, a copy disk that can be accepted as a normal disk can be easily manufactured by using a copy machine that copies the recorded data on the disk as a whole. As a result, disks with weak copy protection are circulated, which leads to illegal copying.

Therefore, an original standard different from the standard for the above-mentioned disc is created, and a standard CD such as "ISO9660" is created.
-A method of applying copy protection that makes it unreadable by software that reads ROM is conceivable. However, even if such a method is used, the data is read from the disc in physical frame or block units and the CD-W
If you use a copy machine that copies to O (write once disc), any disc will be copied.

By the way, as copy protection measures up to now, there is a method of writing a copy code to a VTR, DAT or the like in a hardware manner or in a software manner (logical manner) such as SCMS (serial copy management system). is there. As a copy protection measure in which the copy code is written in hardware, there is one in which smaller pits (pseudo pits) than usual are used as the copy code (for example, Japanese Patent Laid-Open No. 61-178732). Further, as a copy protection measure in which the copy code is written in software, there is one in which the copy protection code is written in conformity with a specific format (for example, JP-A-63-292458).
issue).

[0007]

However, in the case of a copy protection device in which a copy code is written by software, a CD-ROM in which the copy code is written by software cannot be read by software for reading a normal CD-ROM. However, if a copy machine that reads data in lower level frames or blocks and copies to CD-WO is used, the effect of copy protection is lost and any disk is copied. In particular, CD-ROM
Write a copy code in the main data of the general-purpose OS
It is possible to copy the entire disc relatively easily from above, which is a copyright issue. At the very least, it is necessary to take a copy protection measure that cannot be copied only by a dedicated copy software on a general-purpose OS or a host computer.

The optical disc of the present invention (1) records the appearance frequency and the appearance order of the Q mode stored in the Q channel which constitutes the subcode data in a specific pattern, and (2) P which constitutes the subcode data. Set the cue data stored in the channel to a specific value and record it. (3) Record the appearance order of the control data stored in the Q channel that composes the subcode data in a specific pattern. (4) Subcode data (5) The track in the Q data stored in the Q channel that constitutes the subcode data in the lead-in area is recorded by recording the order of appearance of the specific bits in the control data stored in the Q channel that compose The number and the pointer are recorded in a specific order, and (6) the actual reproduction time data of each track information of the Q data stored in the Q channel which constitutes the subcode data is recorded. Are each disc set recorded in a constant precision, also checking device of an optical disk of the present invention reproduces the inspected optical disc, (1)
~ (6) is to determine whether it is suitable for the aspect of the present invention, thereby, the present invention distinguishes the above-mentioned (1) ~ (6) aspect of the disc is a regular disc, while, The purpose is to discriminate a disc that does not conform to this aspect as an illegal copy disc.

[0009]

In order to solve the above-mentioned problems, the present invention provides an optical disk having the following configurations (1) to (12) and a checking device for the optical disk.

(1) The sub-code data (contents of the sub-code data shown in FIG. 1) b, which is recorded according to the IEC908 standard (so-called Red Book standard) and is data accompanying the main data c, is recorded. The specified frequency and appearance order of the Q mode (shown in FIG. 2; mode 1 to mode 3 can be stored) stored in the Q channel forming the sub-code data b have a specific pattern (see FIG. Shown in Fig. 3. 1 mode 2, 9 mode 1 signal train e1, 1 mode 3, 9 mode 1
Of the signal sequence e2, one mode 3, and nine signal sequences e3 of mode 1 are recorded in a repeating pattern).

(2) An optical disc checking apparatus A for discriminating an optical disc according to the above (1), which comprises reading means (pickup) 7 for reading the subcode data b reproduced from the optical disc 1 to be inspected, and the read subcode. The read Q is provided with a determination unit (control circuit) 2 that sequentially reads the Q modes stored in the Q channel from the data b and determines whether the appearance frequency and the appearance order of the read Q modes match a specific pattern. An optical disk check device, characterized in that it is discriminated as a legitimate optical disc (based on the discrimination flow shown in FIG. 10) if the appearance frequency and the appearance order of modes match a specific pattern.

(3) Subcode data b, which is recorded according to the IEC908 standard (so-called redbook standard) and is at least data attached to the main data c.
Has a data area in which the subcode data b is recorded.
The relative time (FIG. 5A) that matches the pause period of the P channel code (shown in FIG. 1) that constitutes the
An optical disc having a specific value shown in (D) set and recorded in Q data.

(4) An optical disc check device B for discriminating an optical disc according to the above (3), which comprises reading means (pickup) 7 for reading the sub-code data b by reproducing the optical disc 1 to be inspected, and the read sub A discriminating means (control circuit) for discriminating whether the relative time that matches the pause period of the P channel code (shown in FIG. 1) from the code data b is read from the Q data and whether the read relative time is a specific value.
2. The optical disk check device according to claim 2, characterized in that the read relative time is discriminated as a legitimate optical disc (based on the discrimination flow shown in FIG. 11) if the read relative time matches a specific value.

(5) Subcode data b, which is recorded according to the IEC908 standard (so-called Redbook standard) and is at least data attached to the main data c.
Has a data area in which the subcode data b is recorded.
The appearance order of the control data (data stored in the control consisting of 4 bits shown in FIG. 2) stored in the Q channel that configures the above is specified by a specific pattern (shown in FIG. 6. The control data of track 1 is “0000”). , The control data of the track 2 is “0001”, and the control data of the following tracks is “000”.
0 "or a specific bit (third bit of control data" XX.
X ") appearing in a specific pattern (illustrated in FIG. 7; pattern in which control data for track 1 is" XX0X ", control data for track 2 is" XX1X ", and control data for the following tracks is" XX0X ") ) An optical disc characterized by being recorded with.

(6) An optical disc checking device C for discriminating an optical disc according to the above (5), which comprises reading means (pickup) 7 for reading subcode data b reproduced from the optical disc 1 to be inspected, and the read subcode. Appearance of the read control data is provided by sequentially providing control data stored in the Q channel from the data b and determining means (control circuit) 2 for determining whether the appearance order of the read control data matches a specific pattern. An optical disk check device characterized in that it is discriminated as a legitimate optical disc (based on the discrimination flow shown in FIG. 12) if the order matches a specific pattern.

(7) An optical disc check device D for discriminating an optical disc according to the above (5), which comprises a reading means (pickup) 7 for reading the subcode data b reproduced from the optical disc 1 to be inspected, and the read subcode. The control data stored in the Q channel from the data b is sequentially read, and the determination means (control circuit) 2 for determining whether or not the appearance order of the specific bits forming the read control data conforms to the specific pattern is provided. An optical disk check device characterized by discriminating a regular optical disk when the appearance order of specific bits constituting the control data conforms to a specific pattern.

(8) Subcode data b, which is data recorded according to the IEC908 standard (so-called redbook standard) and is at least data attached to the main data c.
Of the Q data stored in the Q channel forming the sub-code data b in the lead-in area (a part of the 72-bit Q data shown in FIG. 2 is formed). Is within the accuracy range (Ttoc ± 2 seconds) of the reproduction time calculated based on the absolute time), and the actual reproduction time (TR) does not exceed this value, the specific value of the reproduction time (threshold Th) is set. An optical disc having the set and recorded main data c.

(9) An optical disc checking device E for discriminating an optical disc according to the above (8), which comprises a reading means (pickup) 7 for reading the subcode data b in the lead-in area of the optical disc 1 to be inspected.
The read sub-code data b is sequentially read from the Q data stored in the Q channel, and the read Q data is provided with a determination unit (control circuit) 2 that determines whether the number of tracks and the pointer are in a specific order. An optical disk check device characterized by discriminating from a legitimate optical disc (based on the discrimination flow shown in FIG. 13) when the number of tracks in the Q data and the pointer conform to a specific order.

(10) The subcode data b is recorded in conformity with the IEC908 standard (so-called redbook standard), and has at least a data area in which the subcode data b which is data accompanying the main data c is recorded. The reproduction time data of each track of the Q data stored in the Q channel forming the Q channel (the number of tracks (8 bits) configuring the Q data of 72 bits shown in FIG. 2 is specified accuracy (within the threshold Th shown in FIG. 9). The optical disc is characterized in that it is set and recorded with high accuracy so that it can be reproduced at the time of.

(11) An optical disc check device F for discriminating an optical disc according to the above (10), which is a reading means (pickup) 7 for reading the subcode data b in the lead-in area in which the optical disc 1 to be inspected is reproduced.
Then, the Q data stored in the Q channel is sequentially read from the read subcode data b, and is within the accuracy range (Ttoc ± 2 seconds) of the reproduction time calculated based on the cumulative time in the read Q data, and Actual playback time (T
R) is provided with a discriminating means (control circuit) 2 for discriminating whether or not the main data c is reproduced within a specific value (threshold Th) of the reproduction time set to a value not exceeding this, and the actual reproduction time is It is determined that the reproduction time is within the specific value (based on the determination flow shown in FIG. 14) and the reproduction time is within the specified accuracy.
4. An optical disk check device characterized by making a determination (based on the determination flow shown in FIG. 4).

[0021]

The optical disk of the above-mentioned aspect (that is, (1) an optical disk in which the appearance frequency and the appearance order of the Q mode stored in the Q channel forming the subcode data are recorded in a specific pattern, (2) the subcode data An optical disc in which the cue data stored in the constituent P channel is set and recorded at a specific value, (3) An optical disc in which the appearance order of the control data stored in the Q channel constituting the subcode data is recorded in a specific pattern, ( 4) Q that composes subcode data
An optical disc in which the order of appearance of specific bits in the control data stored in the channel is recorded in a specific pattern, (5) The number of tracks and pointers in the Q data stored in the Q channel that constitutes the subcode data in the lead-in area Are recorded in a specific order, and (6) an optical disc in which actual reproduction time data of each track information of the Q data stored in the Q channel forming the subcode data is set and recorded with a specific accuracy). The inspection disc is set in the check devices A to F and reproduced, and it is determined whether the above-described aspect can be obtained.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An optical disk and its checking device of the present invention will be described below with reference to FIGS. FIG. 1 is a diagram for explaining the contents of subcode data constituting a digital signal sequence obtained by reproducing the optical disc of the present invention,
2 is a diagram for explaining the structure of the Q channel data, FIG. 3 is a diagram for explaining the order of appearance of the Q mode, FIG. 4 is a block diagram of the optical disk check device of the present invention, and FIG. 5 is the P channel. FIG. 6 is a diagram for explaining a pause period related to data, FIG. 6 is a diagram for explaining an appearance order of controls forming Q channel data, and FIG. 7 is an appearance order of specific bits of controls forming Q channel data. FIG. 8 is a diagram for explaining the arrangement of Q data in the lead-in area, FIG. 9 is a diagram for explaining the reproduction time of tracks constituting the Q data, and FIG. 10 is the appearance of the Q mode. FIG. 11 is a detection operation flow chart for detecting the order, FIG. 11 is a detection operation flow chart for detecting the relative time that matches the idle period, and FIG. 12 is detection for detecting the appearance order of the controls forming the Q channel data. Created flowchart, FIG. 13 is a detection operation flow chart of a process for detecting a detection operation flowchart, FIG. 14 is the playback time of the track which constitutes the Q data for detecting the last data track and a pointer constituting the Q data in the lead-in area.

The optical disk of the present invention, as will be described later,
Specific channel of subcode recording part of optical disc such as CD-DA (CD for digital audio) and CD-ROM (read-only data CD mainly for numbers and letters) with outer diameter of 120mm or 80mm To IEC908
Provided is a disc satisfying a standard (so-called Red Book standard, hereinafter referred to as Red Book standard) and additionally writing a specific aspect (specific pattern, specific value, specific order, specific accuracy) described below. It is a thing. Incidentally, the JIS X6281 standard is called the Yellow Book standard, and the standard mutatis mutandis applies to a part of the Red Book standard.

That is, the optical disc of the present invention, as described later, (1) records the appearance frequency and the appearance order of the Q mode stored in the Q channel forming the subcode data in a specific pattern, and (2) Set and record the cue data stored in the P channel that constitutes the subcode data to a specific value,
(3) Record the appearance order of the control data stored in the Q channel that constitutes the subcode data in a specific pattern,
(4) Record the appearance order of the specific bits in the control data stored in the Q channel that composes the subcode data in a specific pattern, and (5) store it in the Q channel that composes the subcode data in the lead-in area. The number of tracks in the Q data and the pointer are recorded in a specific order, and
(6) Each disc is a disc on which actual reproduction time data of each track information of Q data stored in the Q channel forming the subcode data is set and recorded with a specific accuracy.

By the way, the Red Book standard is
It is a standard for CDs (Compact Discs) developed by Sony-Philips (announced in 1981). The specifications of the disk size (outer diameter 120 mm, hole diameter 15 mm), recording format, data area, error correction code CIRC, and subcode area for access for designating and finding tracks are specified.

Further, the optical disc checking apparatus of the present invention stores the disc to be checked in a specific channel of the subcode in the reproduced digital signal sequence when the optical disc of the above-mentioned specific mode is treated as a regular disc. By discriminating whether or not the stored data is in a specific mode, if it can be determined that there is this specific mode, it can be surely determined as a legitimate disk, and if not, as an illegal copy disk. It is a thing.

The optical disk of the present invention is generally composed of a non-data area formed on the outer circumference of the center hole and a data area formed from the outer circumference of the non-data area to the outermost circumference of the disk (neither is shown). The data area is an area in which a large amount of various data including the TOC on the innermost peripheral side is recorded as a large number of pit rows in a spiral or concentric pattern around the center hole. The non-data area is an area in which no data is recorded.

As shown in FIG. 1, a series of reproduced digital signal sequences obtained by reproducing such a disc are successively continuous in units of a frame d composed of a frame synchronization signal a, a sub code b and main data c. It will be. Main data c is voice P for digital audio
The CM-level data and text-level data mainly for reading mainly numbers and characters are stored.

As shown in FIG. 1, the sub-code b is assigned with 8 channels of P, Q and R to W in an area of 1 symbol 8 bits b1 to b8 immediately after the frame synchronization signal a.
The content of each channel is completed in 98 frames (1 symbol = 98 frames = 1 section). The first two frames (byte numbers 0 and 1) of each channel of subcode b form subcode synchronization signals 1 and 2 common to each channel, and have the following patterns after EFM modulation.

Subcode synchronization signal 1 (S0 pattern): “00100000000001” Subcode synchronization signal 2 (S1 pattern): “00000000010010”

As shown in FIG. 5, the P channel code stored in the P channel is, for example, a cue signal for the first program area (main data) of a music piece, and "1" is given for the first 2 to 3 seconds of the program area. "," Otherwise is "0" (P code).

The Q channel code stored in the Q channel is, as shown in FIG. 2, control (byte numbers 2 to 5), Q
Mode (4 bits, byte numbers 6-9), Q data (7
2 bits, byte number 10 to 81), CRC (CRC
C, 16 bits, byte numbers 82 to 97), for a total of 96 bits.

The control signal stored in the control (byte numbers 2 to 5) is a signal that defines the number of audio signal transmission channels and the presence / absence of pre-emphasis, for example. The address signals stored in the Q mode (byte numbers 6 to 9) are defined in three modes (modes 1 to 3) as described later.

In the Q data (byte numbers 10 to 81),
It is specified that the following signals (1) to (5) are stored, and they are composed of a 4-bit 2-digit BCD code. (1) Number of tracks ... Number of tracks on the playback disc (8 bits, byte numbers 10 to 17) (2) Index ... Number of track being played (track number) (8 bits, byte numbers 18 to 25) (3) Relative time ... Playback time from the beginning of each track (minutes,
Seconds, frames (1/75 second display), minutes (8 bits, byte numbers 26 to 33), seconds (8 bits, byte numbers 34 to 4)
1), frame (8 bits, byte numbers 42 to 49) (4) “0” ... 8 bits, byte numbers 50 to 57 (5) Cumulative time (absolute time) ... Cumulative playback time from the beginning of the first track ( Minutes, seconds, frame display), minutes (8 bits, byte numbers 58 to 65), seconds (8 bits, byte numbers 66 to 73), frames (8 bits, byte numbers 74)
~ 81)

Although not described in detail here, the optical disk player can display the track number (music number) and time on the display by reproducing the Q channel code, and at the same time,
You can access any track.

That is, the position of the pickup is confirmed by the reproduction Q channel code, the number of moving tracks to the target track (target music) is calculated (calculated from the cumulative reproduction time difference and the linear velocity), and the pickup feed servo is forcibly fed to perform an access operation. Then, the pickup position is accurately grasped by the reproduced Q channel code, and the next access operation is performed.
All of these controls are performed by a microcomputer (a control circuit 2 described later), and the access operation ends when the pickup is located at the target track (neither is shown).

Now, the Q mode (byte number 6 to
The 4-bit address signal stored in 9) has three modes defined as follows. That is, mode 1 (“0001”): track number, time code, etc. mode 2 (“0010”): catalog number of disc mode 3 (“0011”): country, copyright holder code, etc. (mode 3 is originally digital. This is a mode that defines the audio mode, but here, when using a CD-ROM, the case where the code of the above contents is stored is shown.) Further, the frequency of appearance thereof is as follows. It is prescribed. Mode 1 appearance frequency: 9 or more in 10 consecutive sections Mode 2 appearance frequency: 1 or more in 100 consecutive sections Mode 3 appearance frequency: 1 or more in 100 consecutive sections On the other hand, the appearance order of these modes 1 to 3 is not defined.

(Embodiment 1) Correspondence to the invention described in claim 1 Therefore, the present inventor pays attention to the appearance order of the Q modes (mode 1 to mode 3) not specified in the Red Book standard, and Is newly defined, and an optical disc in which the Q mode conforming to this regulation is recorded is provided as a regular disc. Further, as a device corresponding to this, an optical disc check device for discriminating a regular disc is provided.

That is, this regular disc has the following structure. At least a Q mode having a data area in which sub-code data (contents of the sub-code shown in FIG. 1) b, which is data accompanying the main data c, is recorded and is stored in a Q channel forming the sub-code data b. (Shown in FIG. 2; the modes 1 to 3 can be stored) have a specific pattern (shown in FIG. 3) of a specific pattern (one mode 2, nine mode 1 signal sequences e1, one Mode 3, 9 signal sequences e2 of mode 1, 1 mode 3,
This is an optical disc in which 9 mode 1 signal trains e3 are recorded in a repetitive pattern having an arrangement period).

More specifically, the types of patterns in the Q mode (mode 1 to mode 3) appearance order are considered infinite, but
Here, for example, as shown in FIG. 3, a pattern of the Q mode appearance order is defined. That is, in FIG. 3, sequentially from left to right, ..., Mode 1, mode 1, one mode 2,
Nine mode 1 signal sequences e1, 1 mode 3, 9 mode 1 signal sequences e2, 1 mode 3, 9 mode 1 signal sequences e3, mode 2, ... Are arranged. There is. In this array, the pattern of the Q mode appearance order is one mode 2, nine signal strings e1 of mode 1, one mode 3, 9
One signal sequence e2 of mode 1, one mode 3 and nine signal sequences e3 of mode 1 are set as one cycle, and are repeatedly formed in this cycle. It goes without saying that the pattern of the Q-mode appearance order satisfies the above-mentioned regulation of the appearance frequency.

(Embodiment 2) Corresponding to the invention described in claim 2 The optical disc checking apparatus of the present invention generally discriminates an optical disc capable of reading the above-mentioned Q-mode appearance sequence pattern as a regular disc.

That is, this optical disk checking device is
It has the following configuration. Pickup 7 for reading subcode data b reproduced from the optical disk 1 to be inspected
And a control circuit 2 for sequentially reading the Q mode stored in the Q channel from the read subcode data b and determining whether the appearance frequency and the appearance order of the read Q mode match a specific pattern. The optical disc check device A is characterized in that it discriminates from a legitimate optical disc (based on the discrimination flow shown in FIG. 10) when the appearance frequency and the appearance order of the Q mode conform to a specific pattern.

More specifically, the optical disk check device A
4, as shown in FIG. 4, the control circuit 2, the servo processing circuit 3, the drivers 4, 5, the spindle motor 6, the pickup 7, the RF amplifier 8, the RF signal processing circuit 9, and the decoder 9
Composed of A. 1 is the disc to be inspected.

The operation of the optical disc checking apparatus A having the above-described structure will be described with reference to FIGS. 3, 4 and 10. Here, the section used in FIG. 10 means a data block unit in which the heads of the subcode b in FIG. 1 are aligned (1 section = 98 frames shown in FIGS. 1 and 3), and P
T is a pointer (correspondingly, PT = 0 of the pointer in the Q mode appearance order (shown in FIG. 3) is the first section (section number 1), pointer PT = 1 is the 11th section (section number 11)) , And the pointer PT = 2 corresponds to the 21st section (section number 21), respectively.)

The detection operation flowchart for detecting the Q-mode appearance order shown in FIG. 10 is a flow for judging the presence or absence of the Q-mode appearance order pattern shown in FIG. It is confirmed that the mode 3 sequentially exists in the section numbers 11 and 21, and that the mode 3 exists in all sections except the section numbers 1, 11 and 21. Mode 2,
For the convenience of the explanation below, the read cycle of 3 and 3 is set to only once, but if this cycle is read more, Q
It goes without saying that the detection reliability of the appearance order of the modes is improved. As a result, if the Q mode appears in this order (modes 2, 3, and 3), it is determined to be a regular disk, and if the order is incorrect, it is determined to be an illegal copy disk.

That is, the control circuit 2 which constitutes the optical disk checking device A confirms that the disk 1 to be inspected is set on the turntable (not shown), and when the user selects the check operation (play operation), it is changed. In response, the control circuit 2 sends a disk rotation start control signal to the servo processing circuit 3 (100). When the servo processing circuit 3 receives the disk rotation start control signal, the servo processing circuit 3 sends to the driver 4 a motor drive signal for rotationally driving the spindle motor 6 in the rotation stopped state. The driver 4 amplifies the motor drive signal and outputs the motor drive signal to the spindle motor 6
Supply to. Before or after this, the servo processing circuit 3 sends a transfer signal for transferring the pickup 7 to the TOC to the driver 5 under the control of the control circuit 2. The driver 5 supplies a transfer signal obtained by amplifying this transfer signal to the pickup 7.

In this way, the spindle motor 6 rotates the disk 1 to be inspected set on the turntable by CLV, and the pickup 7 is transferred to the TOC to enable tracing. The control circuit 2 is supplied with T from the pickup 7 through the RF amplifier 8 and the RF signal processing circuit 9.
The OC data is temporarily stored in the built-in memory, and the stored T
Based on the OC data, a control signal for accessing the pickup 1 to the track 1 is output to the servo processing circuit 3. When the servo processing circuit 3 receives this control signal, the servo processing circuit 3 sends a transfer signal for transferring the pickup 7 to the track 1 to the driver 5 in response to this control signal. The driver 5 supplies a transfer signal obtained by amplifying this transfer signal to the pickup 7. In this way, the pickup 7 is transferred to the track 1, and as described above, it becomes possible to trace the sub-code b after tracing the frame synchronization signal a.

As a result, the control circuit 2 causes the RF amplifier 8, R
The contents of the subcode b of the track 1 supplied from the pickup 7 via the F signal processing circuit 9 are decoded. The control circuit 2 decodes the contents of the control data (Q code) of the Q channel of the sub code b supplied from the decoder 9A, and the Q code having a 4-bit structure is, for example, “00XX” (X is “0”, “1”). In the case of "any condition", the disc 1 to be inspected is discriminated as a CD-DA. Then, this is reproducible (110, 120).

On the other hand, the control circuit 2 decodes the content of the Q channel control data (Q code) of the sub code b supplied from the decoder 9A, and when the 4-bit Q code is, for example, "01XX". , Inspected disc 1 CD-
Determined as ROM.

The control circuit 2 controls the disc 1 to be inspected to be a CD-R.
When it is determined to be OM, it is determined whether or not the appearance frequency and appearance order of the Q mode of this CD-ROM conform to a specific pattern. First, the control circuit 2 causes the pointer PT = 0, which is the cue section of the pattern in which the Q mode of the currently read subcode b is the order of appearance shown in FIG.
Until the (first section) is reached, the determination of the Q mode appearance order is stopped. When the pointer becomes 0, the control circuit 2 reads the mode of the section at this time (130, 14).
0). Then, the mode of the read section is determined (150). As a result of this determination, in the case of mode 2, it is determined again whether the pointer PT = 0 (160). It waits until the pointer PT = PT + 1 after one cycle of this pattern (170). Thereafter, it is determined whether this state is a predetermined number of sections (41st section counting from the first section with PT = 0) (180). As a result,
In the case of the mode 2 in which the predetermined number of sections is read, the control circuit 2 determines that the disk 1 to be inspected is an illegal copy disk (190). If it is not the mode 2 in which the predetermined number of sections is read, the section when PT = 0 is read again (180 → 140)

On the other hand, the control circuit 2 discriminates the mode of the read section. As a result, in the case of mode 1, PT = 0
The section incremented by 1 is read from the section at this time, and the mode determination of the section at this time is successively performed (150 → 140).

On the other hand, when the control circuit 2 discriminates the mode 3 as a result of discriminating the mode of the read section,
The pointer at this time is determined (200). When PT = 0, this state is the predetermined number of sections (the first section of PT = 0.
It is determined whether it belongs to the 11th section counted from the section (180). As a result, when the predetermined number of sections has been read, the control circuit 2 determines that the disk 1 to be inspected is an illegal copy disk (19).
0). When pointer = 1, wait until pointer PT = PT + 1 after one cycle of this pattern (17
0). After this, this state becomes a predetermined number of sections (PT =
It is determined whether the first section is the 51st section (180) (180). As a result, when the predetermined number of sections has been read, the control circuit 2 determines that the disk 1 to be inspected is an illegal copy disk (19).
0). When pointer = 2, the control circuit 2 discriminates the disc 1 to be inspected as a regular disc (210).

As described above, the optical disc checking apparatus A discriminates the disc to be inspected 1 from the CD-DA by discriminating the Q mode appearance order shown in FIG. 3 for each section.
It is possible to check whether it is an illegally copied CD-ROM or a legitimate CD-ROM.

(Third Embodiment) Corresponding to the Invention of Claim 3 In the above-mentioned optical disc discrimination method, it is performed by discriminating the presence or absence of the appearance order of the Q mode shown in FIG. , P-channel code (P-code) used as an indicator of programs in the disk and rest periods
To use.

That is, this regular disc has the following structure. A relative time (FIG. 1) having at least a data area in which the sub-code data b, which is data accompanying the main data c, is recorded, and adapted to the pause period of the P-channel code (illustrated in FIG. 1) that constitutes the sub-code data b The optical disc is characterized in that the pause period shown in FIG. 5 (A) is set and recorded in Q data as a specific value shown in FIG. 5 (D).

More specifically, the timing of the P code is as shown in FIG.
As shown in (A) and (B), just before the first program area (track 1), only a rest period of 2-3 seconds,
It is set by the standard to change from "0" to "1".

Therefore, the relative time (relative time) which is adapted to the pause period of the P code (P = 1) and is stored in the Q data (the relative time constituting the Q data shown in FIG. 2) is the rising edge of the pause period. Display the elapsed time from (minutes, seconds, frames (1/75). Minutes (8 bits, byte number 26 to
33), seconds (8 bits, byte numbers 34 to 41), and frames (8 bits, byte numbers 42 to 49)) are strictly defined. For example, from the rise of the rest period, 00m0
2s10f (00 minutes 02 seconds 10 frames) is set and recorded as a specific value. This specific value may be any value as long as it fits within the rest period.

In this way, the relative time (relative time) corresponding to the strictly defined rest period is stored in the Q data separately from the original relative time, and the presence or absence of this relative time is discriminated. It is possible to distinguish a disc having a corresponding relative time as a regular disc.

(Embodiment 4) Corresponding to the invention described in claim 4 The optical disk checking apparatus of the present invention generally discriminates an optical disk from which the relative time corresponding to the above-mentioned rest period can be read as a regular disk. .

Now, the flow chart of the detection operation for detecting the relative time suitable for the rest period shown in FIG. 11 is shown in FIG.
This is a flow for determining the presence or absence of the relative time (relative time) of the Q data corresponding to the P code P = 1 shown in (D). First, the TOC is read, and the reproduction is continued until the TOC reading is completed. Since P data is P = 0 in the lead-in area,
When P = 1, it is detected that the rest period has risen. At this point, the relative time of the pause section is written in the Q data, so read it and read the relative time, for example, 00
If it is m02s10f, it is determined to be a legitimate disc, and if not, it is determined to be an unauthorized copy disc.

That is, the control circuit 2 which constitutes the optical disc checking apparatus B confirms that the disc 1 to be inspected is set on the turntable (not shown), and when the user selects the check operation (play operation), the control is performed. In response, the control circuit 2 sends a disk rotation start control signal to the servo processing circuit 3 (300). When the servo processing circuit 3 receives the disk rotation start control signal, the servo processing circuit 3 sends to the driver 4 a motor drive signal for rotationally driving the spindle motor 6 in the rotation stopped state. The driver 4 amplifies the motor drive signal and outputs the motor drive signal to the spindle motor 6
Supply to. Before or after this, the servo processing circuit 3 sends a transfer signal for transferring the pickup 7 to the TOC to the driver 5 under the control of the control circuit 2. The driver 5 supplies a transfer signal obtained by amplifying this transfer signal to the pickup 7.

In this way, the spindle motor 6 rotates the disk to be inspected 1 set on the turntable by CLV, and the pickup 7 is transferred to the TOC to enable tracing. The control circuit 2 is supplied with T from the pickup 7 through the RF amplifier 8 and the RF signal processing circuit 9.
The OC data is temporarily stored in the built-in memory, and the stored T
A control signal for accessing the pickup 1 to the track 1 is output to the servo processing circuit 3 based on the OC data (310). When the servo processing circuit 3 receives this control signal, the servo processing circuit 3 sends a transfer signal for transferring the pickup 7 to the track 1 to the driver 5 in response to this control signal. The driver 5 supplies a transfer signal obtained by amplifying this transfer signal to the pickup 7. In this way, the pickup 7 is transferred to the track 1, and as described above, it becomes possible to trace the sub-code b after tracing the frame synchronization signal a.

As a result, the control circuit 2 causes the RF amplifier 8, R
The contents of the subcode b of the track 1 supplied from the pickup 7 via the F signal processing circuit 9 are decoded. The control circuit 2 decodes the content of the control data (Q code) of the Q channel of the sub code b supplied from the decoder 9A, and when the Q code of 4 bits is, for example, "00XX",
The disc 1 to be inspected is discriminated as a CD-DA. Then, this is made reproducible (320).

On the other hand, the control circuit 2 decodes the contents of the Q channel control data (Q code) of the sub code b supplied from the decoder 9A, and when the 4-bit Q code is, for example, "01XX". , Inspected disc 1 CD-
Determined as ROM.

The control circuit 2 sets the disc 1 to be inspected to the CD-R.
When it is judged as OM, the CD-ROM is moved to the reproducing state (the pickup 7 is sequentially moved to the lead-in area → the pause period → the first program area (340). At this time, the control circuit 2 makes the subcode. b P code and Q
Sequentially read out the relative time that matches the data pause period,
It is determined whether or not there is a rise in the pause period in which the P code changes from P = 0 to 1 (340 to 360). As a result,
If it is not possible to determine the arrival of this pause period, this determination is continued until it is possible (360 → 350 → 360). On the other hand, if the rise of the rest period is determined, Q at that time is determined.
Relative time (for example, 00m0) that matches the rest period of data
2s10f) is present, and if the relative time suitable for the rest period can be determined, it is determined as a legitimate disk, otherwise it is determined as an illegal copy disk, and the illegal copy disk is ejected outside the device (370-370). 400).

As described above, the optical disc checking apparatus B is, as shown in FIG. 5D, a P code (P = 1).
Relative time (relative time) to the Q data that matches the rest period of
By discriminating whether or not is stored, the disc 1 to be inspected is a CD-DA, an illegally copied CD-ROM,
It can be checked whether it is a regular CD-ROM.

(Embodiment 5) Corresponding to the invention of claim 5 In the above-mentioned regular disc discrimination method, the presence or absence of the appearance order of the Q mode is used for discrimination (shown in FIG. 3). A description has been given of the one (shown in FIG. 5) that is used to determine the presence or absence of the relative time of Q data that matches the idle period, but here, the control that configures the Q channel shown in FIG. , Q code) is used to determine whether or not a series of Q codes has a specific pattern, thereby performing normal disc identification.

That is, this regular disc has the following structure. At least, there is a data area in which sub-code data b, which is data accompanying the main data c, is recorded, and the appearance order of the Q-codes stored in the Q-channel forming the sub-code data b is specified by a specific pattern (FIG. 6).
Illustrated in. This is an optical disc in which the control data of track 1 is recorded as "0000", the control data of track 2 is "0001", and the control data of the following tracks are "0000".

More specifically, the Q code shown in FIG. 2 for storing the characteristic data of the audio signal is defined as follows. Q code "0000": Transmission channel 2, without pre-emphasis Q code "1000": Transmission channel 4, without pre-emphasis Q code "0001": Transmission channel 2, with pre-emphasis Q code "1001": Transmission channel 4, pre-emphasis With emphasis

Further, such a change period of the Q code is defined only to be possible only in the above-mentioned rest period (P code "1", shown in FIG. 5A).

Therefore, as shown in FIG. 6, a series of Q-codes are used for different codes ("0" only for track 2 (Tr No. 2)).
001 "), and an audio signal without pre-emphasis is recorded in the main data by the transmission channel 4, and each Q of the other tracks 1, 3, 4, 5 ,.
A new code is newly defined as the same code (“0000”) and the main data is recorded with an audio signal without pre-emphasis in the transmission channel 2.

In this way, by reproducing the disc on which the newly defined Q code sequence is recorded and reading it, the Q code of track 1 is "0000", the Q code of track 2 is "0001", and the following tracks 3 is "0"
000 ", track 4 is" 0000 ", track 5 is"
A disc that can be read with a Q code bit string of 0000 ″, ... Can be discriminated as a legitimate disc.

(Embodiment 6) Corresponding to the invention of claim 6 The optical disc checking apparatus of the present invention is generally a regular disc in which a series of Q code strings corresponding to the above-mentioned pause period is a specific pattern. Is determined as.

That is, this optical disk check device is
It has the following configuration. Pickup 7 for reading subcode data b reproduced from the optical disk 1 to be inspected
And a control circuit 2 for sequentially reading the Q codes from the read sub-code data b and determining whether the appearance order of the read series of Q codes matches a specific pattern, and the appearance of the read series of Q codes. The optical disk check device C is characterized in that if the order conforms to a specific pattern, it is discriminated as a legitimate optical disc (based on the discrimination flow shown in FIG. 12).

Specifically, the optical disk checking device C
Has almost the same configuration as the above-described optical disc checking devices A and B shown in FIG. 4, and is different only in the disc discriminating flow of the control circuit 2. Therefore, only the disc discrimination flow of the control circuit 2 will be described here. The same components as those described above are designated by the same reference numerals, and the description thereof will be omitted.

The detection operation flow chart for detecting the Q code shown in FIG. 12 is a flow for determining the presence / absence of a specific pattern in the Q code string shown in FIG. 6. First, the TOC is read, the track 1 is sought, and the Q code is detected. After confirming that it is "0000", seek to track 2 and confirm that the Q code is "0001". As a result, if these series of Q codes are "0000" and "0001", it is judged as a legitimate disk, and if not, it is judged as an illegal copy disk. Actually, of course, the detection reliability can be improved by reading the Q code "0000" of the tracks 3 and 4 other than the track 1 and judging the authenticity of the disk based on this.

That is, the control circuit 2 which constitutes the optical disk checking device C confirms that the disk 1 to be inspected is set on the turntable (not shown), and when the user selects the check operation (play operation), In response, the control circuit 2 sends a disk rotation start control signal to the servo processing circuit 3 (500). When the servo processing circuit 3 receives the disk rotation start control signal, the servo processing circuit 3 sends to the driver 4 a motor drive signal for rotationally driving the spindle motor 6 in the rotation stopped state. The driver 4 amplifies the motor drive signal and outputs the motor drive signal to the spindle motor 6
Supply to. Before or after this, the servo processing circuit 3 sends a transfer signal for transferring the pickup 7 to the TOC to the driver 5 under the control of the control circuit 2. The driver 5 supplies a transfer signal obtained by amplifying this transfer signal to the pickup 7.

In this way, the spindle motor 6 rotates the disk to be inspected 1 set on the turntable by CLV, and the pickup 7 is transferred to the TOC to enable tracing. The control circuit 2 is supplied with T from the pickup 7 through the RF amplifier 8 and the RF signal processing circuit 9.
The OC data is temporarily stored in the built-in memory, and the stored T
Based on the OC data, a control signal for accessing the pickup 1 to the track 1 is output to the servo processing circuit 3 (510). When the servo processing circuit 3 receives this control signal, the servo processing circuit 3 sends a transfer signal for transferring the pickup 7 to the track 1 to the driver 5 in response to this control signal. The driver 5 supplies a transfer signal obtained by amplifying this transfer signal to the pickup 7. In this way, the pickup 7 is transferred to the track 1, and as described above, it becomes possible to trace the sub-code b after tracing the frame synchronization signal a.

As a result, the control circuit 2 causes the RF amplifier 8, R
The contents of the subcode b of the track 1 supplied from the pickup 7 via the F signal processing circuit 9 are decoded. The control circuit 2 decodes the content of the control data (Q code) of the Q channel of the sub code b supplied from the decoder 9A, and when the Q code of 4 bits is, for example, "00XX",
The disc 1 to be inspected is discriminated as a CD-DA. Then, this can be reproduced (520, 530).

On the other hand, the control circuit 2 decodes the content of the Q channel control data (Q code) of the sub code b supplied from the decoder 9A, and when the 4-bit Q code is, for example, "01XX". , Inspected disc 1 CD-
Determined as ROM.

The control circuit 2 sets the disc 1 to be inspected to the CD-R.
If it is determined to be OM, the pickup 7 seeks from the TOC area to the track 1 and reads the Q code of the subcode Q channel (540, 550). As a result, Q of track 1
If the code is not "0000", it is determined that the disc is an illegal copy disc, and the disc to be inspected 1 is ejected out of the apparatus (56
0-580). On the other hand, the Q code of track 1 is "000
If it is "0", the pickup 7 is further sought to the track 2 and the Q code of the subcode Q channel is read. If the Q code of the track 2 is "0001", it is judged as an authorized disc. It is determined to be a copy disk (590 to 620, 570, 580).

As described above, the optical disc checking apparatus C discriminates whether the disc 1 to be inspected is a CD- disc by discriminating the presence or absence of the specific pattern of the series of Q code strings shown in FIG.
DA, illegally copied CD-ROM, legitimate CD-R
You can check if it is one of the OM.

(Embodiment 7) Corresponding to the invention of claim 5 In the above-mentioned regular disc discriminating method, as an example of a series of Q code sequences using the presence or absence of a specific pattern, the Q code of track 1 0000 ", track 2
"0000" for the track 3, "0000" for the track 3, "0000" for the track 4 is used (shown in FIG. 6), but here, as another example, Q of each track is used. Since the third bit of the 4 bits forming the code defines the copy information (whether copying is possible or not), the normal disc discrimination is performed by defining this as follows.

That is, this regular disc has the following structure. In the optical disc according to the fifth embodiment described above, the order of appearance of specific bits (third bit “XX · X” of the Q code) forming the Q code is specified by a specific pattern (shown in FIG. 7; control of track 1). The data is "XX0
X ", the control data of the track 2 is" XX1X ", and the control data of the following tracks is" XX0X ")
It is an optical disc characterized by being recorded in.

More specifically, as shown in FIG.
Other than the Q code of track 2, the copy prohibition code "XX0
Although it is X ", only the Q code of track 2 is" XX1X "of copy permission. Since it is supposed that the third bit can be changed between each section, it is changed not in track unit but in section unit. As you can see, if you allow copy permission for a specific track or section, you can use it as a copy code because ordinary code machines do not copy this code.

(Embodiment 8) Corresponding to the invention of claim 7 The optical disk checking apparatus of the present invention is an optical disk in which the specific bits constituting each Q code of the series of Q code sequences described above are substantially specific patterns. Is discriminated as a regular disc.

That is, this optical disk check device is
It has the following configuration. Pickup 7 for reading subcode data b reproduced from the optical disk 1 to be inspected
And a control for sequentially reading the Q code stored in the Q channel from the read sub code data b and determining whether the appearance order of the specific bit (third bit) forming the read Q code matches a specific pattern. An optical disc check device D including a circuit 2 and discriminating a regular optical disc if the appearance order of the 3rd bit constituting the read Q code matches a specific pattern.

More specifically, the optical disk check device D
Is the optical disk check device A shown in FIG.
.About.C, the only difference is in the disc discriminating flow of the control circuit 2. Therefore, only the disc discrimination flow of the control circuit 2 will be described here. The same components as those described above are designated by the same reference numerals, and the description thereof will be omitted.

The detecting operation for detecting the pattern of the specific bit of the Q code is a flow for determining the presence / absence of the pattern of the specific bit of the Q code string shown in FIG. 6. First, the TOC is read, the track 1 is sought, and Q is searched. After confirming that the code is "XX0X", seek to track 2 and confirm that the Q code is "XX1X". As a result, if the third bit of the series of Q codes is "0" or "1", it is determined as a legitimate disc, and if not, it is determined as an illegal copy disc. In fact, the detection reliability can be improved by reading the third bit of the Q code "XX0X" of the tracks 3 and 4 other than the track 1 as "0" and judging the authenticity of the disk based on this. Is.

That is, the control circuit 2 constituting the optical disc check device D confirms that the disc to be inspected 1 is set on the turntable (not shown), and when the user selects the check operation (play operation), In response, the control circuit 2 sends a disk rotation start control signal to the servo processing circuit 3. When the servo processing circuit 3 receives the disk rotation start control signal, the servo processing circuit 3 sends to the driver 4 a motor drive signal for rotationally driving the spindle motor 6 in the rotation stopped state. The driver 4 supplies a motor drive signal obtained by amplifying this motor drive signal to the spindle motor 6. Before or after this, the servo processing circuit 3 sends a transfer signal for transferring the pickup 7 to the TOC to the driver 5 under the control of the control circuit 2. The driver 5 supplies a transfer signal obtained by amplifying this transfer signal to the pickup 7.

In this way, the spindle motor 6 rotates the disc to be inspected 1 set on the turntable by CLV, and the pickup 7 is transferred to the TOC to enable tracing. The control circuit 2 is supplied with T from the pickup 7 through the RF amplifier 8 and the RF signal processing circuit 9.
The OC data is temporarily stored in the built-in memory, and the stored T
Based on the OC data, a control signal for accessing the pickup 1 to the track 1 is output to the servo processing circuit 3. When the servo processing circuit 3 receives this control signal, the servo processing circuit 3 sends a transfer signal for transferring the pickup 7 to the track 1 to the driver 5 in response to this control signal. The driver 5 supplies a transfer signal obtained by amplifying this transfer signal to the pickup 7. In this way, the pickup 7 is transferred to the track 1, and as described above, it becomes possible to trace the sub-code b after tracing the frame synchronization signal a.

As a result, the control circuit 2 causes the RF amplifier 8, R
The contents of the subcode b of the track 1 supplied from the pickup 7 via the F signal processing circuit 9 are decoded. The control circuit 2 decodes the content of the control data (Q code) of the Q channel of the sub code b supplied from the decoder 9A, and when the Q code of 4 bits is, for example, "00XX",
The disc 1 to be inspected is discriminated as a CD-DA. Then, this is reproducible.

On the other hand, the control circuit 2 decodes the content of the Q channel control data (Q code) of the sub code b supplied from the decoder 9A, and when the 4-bit Q code is, for example, "01XX". , Inspected disc 1 CD-
Determined as ROM.

The control circuit 2 drives the disc 1 to be inspected to the CD-R.
If it is determined to be OM, the pickup 7 seeks from the TOC area to the track 1 and reads the Q code of the subcode Q channel (540, 550). As a result, Q of track 1
If the code is not "XX0X", it is determined that the disc is an illegal copy disc, and the disc 1 to be inspected is ejected from the apparatus. On the other hand, if the Q code of track 1 is "XX0X", the pickup 7 is further sought to track 2 to read the Q code of the subcode Q channel, and if the Q code of track 2 is "XX1X", it is a normal disc. If not, it is determined as an illegal copy disk.

As described above, the optical disc checking apparatus D determines whether the disc 1 to be inspected is a CD by discriminating the presence or absence of the third bit pattern of each Q code forming the series of Q code sequences shown in FIG. It is possible to check whether it is a DA, an illegally copied CD-ROM, or a legitimate CD-ROM.

(Embodiment 9) Corresponding to the invention described in claim 8 By the way, the regular disc discriminating method described here is TO
By identifying the final read data from the C table, this is used for disc authenticity determination.

That is, this regular disc has the following structure. At least a subcode data b, which is data associated with the main data c, is recorded, and the subcode data b in the lead-in area is included.
The optical disc is characterized in that the number of tracks and pointers in the Q data that compose the above are recorded in a specific order (so that they can be finally read).

More specifically, the TOC is an area in the disk lead-in area that indicates the entire disk information. The Red Book standard specifies that this is a kind of table in which the same data must be recorded repeatedly in order to improve the reading accuracy. Then, the final read data from the table at the position of the seam where the reproduction of the lead-in area ends and the program area starts (immediately before the pause period described above) may end with any data in the table. The normal disc discrimination method described here is to utilize this for disc authenticity determination by newly specifying the final read data from the table constituting the TOC.

The TOC Q data table of the lead-in area is the array shown in FIG. From the beginning,
Track number (TNO), pointer, relative time (minute (MIN), second (SEC), frame (FRAC)),
“0”, accumulated time (minute (P-MIN), second (P-SE
C), frame (P-FRAC)) are arranged. For convenience of explanation, only the track number and the pointer will be described here. In this table, as shown in the figure, pointers are from "00" to "A2", and one pointer value continues three times. Further, "00" to "A2" are repeated until the lead-in is completed.

According to the standard, when the lead-in ends, it may end anywhere from "00" to "A2". Therefore, the end of each company's disc and the copied discs are different. Therefore, if the point value at the end of the lead-in is defined as "A2", for example, if the disc is copied, this value is not copied and the value ends with another value, and "A2" can be used as a copy code.

(Embodiment 10) Corresponding to the invention of claim 9 The optical disk checking apparatus of the present invention generally defines the data value of the Q data pointer at the end of the TOC and reads the pointer of this value. The disc that can be ejected is discriminated as a legitimate disc.

That is, this optical disk check device is
It has the following configuration. A pickup 7 that reads the subcode data b in the lead-in area where the optical disc 1 to be inspected is read, Q data stored in the Q channel is sequentially read from the read subcode data b, the number of tracks in the read Q data, and a pointer. And a control circuit 2 for determining whether the number of tracks in the read Q data and the pointer conform to the specific order, the disc is determined to be a legitimate optical disc (based on the determination flow shown in FIG. 13). It is an optical disk check device E characterized in that.

Specifically, the optical disc check device E
Has almost the same configuration as the above-mentioned optical disk check devices A to D, and is different only in the disk discriminating flow of the control circuit 2. Therefore, only the disc discrimination flow of the control circuit 2 will be described here. The same components as those described above are designated by the same reference numerals, and the description thereof will be omitted.

Now, Q at the end of TOC shown in FIG.
The code pointer detection operation flowchart is a flow for determining the value of the final pointer of the TOC shown in FIG. 8. First, the TOC is read and reproduced as it is, and when the end of the TOC is found, the pointer value of the Q code (for example, A2)
If it does match, it is judged as a legitimate disk, and if not, it is judged as an illegal copy disk.

That is, the control circuit 2 constituting the optical disc checking device E confirms that the disc to be inspected 1 is set on the turntable (not shown), and when the user selects the check operation (play operation), In response, the control circuit 2 sends a disk rotation start control signal to the servo processing circuit 3 (700). When the servo processing circuit 3 receives the disk rotation start control signal, the servo processing circuit 3 sends to the driver 4 a motor drive signal for rotationally driving the spindle motor 6 in the rotation stopped state. The driver 4 amplifies the motor drive signal and outputs the motor drive signal to the spindle motor 6
Supply to. Before or after this, the servo processing circuit 3 sends a transfer signal for transferring the pickup 7 to the TOC to the driver 5 under the control of the control circuit 2.

In this way, the spindle motor 6 rotates the disk 1 to be inspected set on the turntable by CLV, and the pickup 7 is transferred to the TOC to enable tracing. The control circuit 2 is supplied with T from the pickup 7 through the RF amplifier 8 and the RF signal processing circuit 9.
The OC data is temporarily stored in the built-in memory, and the stored T
Based on the OC data, a control signal for accessing the pickup 1 to the track 1 is output to the servo processing circuit 3 (710). Upon receiving this control signal, the servo processing circuit 3 sends a transfer signal for transferring the pickup 7 to the lead-in area to the driver 5 in response to this control signal. The driver 5 picks up the transfer signal obtained by amplifying this transfer signal 7
Supply to. In this way, the pickup 7 is moved to the lead-in area and then to the track 1, and as described above, it is possible to trace the sub-code b after tracing the frame synchronization signal a.

As a result, the control circuit 2 causes the RF amplifier 8, R
The contents of the subcode b of the track 1 supplied from the pickup 7 via the F signal processing circuit 9 are decoded. The control circuit 2 decodes the contents of the control data (Q code) of the Q channel of the sub code b supplied from the decoder 9A, and the Q code having a 4-bit structure is, for example, “00XX” (X is “0”, “1”). In the case of "any condition", the disc 1 to be inspected is discriminated as a CD-DA. Then, this is reproducible (720, 730).

On the other hand, the control circuit 2 decodes the contents of the control data (Q code) of the Q channel of the subcode b supplied from the decoder 9A, and when the 4-bit Q code is, for example, "01XX". , Inspected disc 1 CD-
Determined as ROM. The control circuit 2 drives the disc 1 to be inspected to C
If it is determined to be a D-ROM, this CD-ROM is moved to the reproduction state (the pickup 7 is sequentially moved to the lead-in area → the pause period → the first program area, and the TOC data reading is completed (720 to 760). As a result, the control circuit 2 determines whether the track and pointer finally read from the Q code in the lead-in area have a specific value (track number "0" and pointer "A2") (770). As a result, if it can be discriminated from this specific value, it is determined to be a legitimate disc (800), otherwise it is determined to be an illegal copy disc, and the illegal copy disc is ejected outside the device (780, 790).

As described above, the optical disc checking apparatus E determines whether the value of the Q data pointer at the end of the TOC is a prescribed value, as shown in FIG. Is a CD-DA, an illegally copied CD-ROM, or a legitimate CD-ROM.

(Embodiment 11) Corresponding to the invention according to claim 10 In the lead-in area shown in FIG. 8, there is a TOC indicating the entire disc information. And here, the start time of each track is the absolute time (cumulative time (minute (PM
IN), seconds (P-SEC), frames (P-FRA)
It is written in the form of C)). For example, the reproduction time of track 1 (relative time (minutes (MIN), seconds (SEC), frame (FRAC)) is the difference between the start times of tracks 1 and 2, but the accuracy of the start times of tracks 1 and 2 is According to the standard, it is ± 1 second, and the accuracy of the reproduction time of the actually reproduced track 1 is ± 2 seconds.The regular disc discrimination method described here is the reproduction time calculated from the absolute time and the actual reproduction time. This is used for disc authenticity determination by specifying the precision with the playback time of the disc.

That is, this regular disc has the following structure. At least a data area in which the subcode data b, which is data accompanying the main data c, is recorded, and the cumulative time in the Q data stored in the Q channel forming the subcode data b in the lead-in area (see FIG. 2 is within the accuracy range (Ttoc ± 2 seconds) of the reproduction time calculated based on the absolute time) which constitutes part of the Q data consisting of 72 bits shown in FIG. 2 and the actual reproduction time (TR) is The optical disc is characterized in that the main data c is recorded by setting a specific value (threshold Th) of the reproduction time to a value that does not exceed the value.

More specifically, taking the track 1 as an example, the accuracy range is Ttoc ± 2, where Ttoc is the reproduction time calculated by the previous TOC. Then, the actual reproduction time is set to TR, and the predetermined threshold is set to Th. In the present invention, the actual reproduction time TR is recorded within a predetermined threshold value Th or less while being within the accuracy range of Ttoc, and this is detected and used as a copy code. In addition, the threshold Th is set to the reproduction time T
The same applies when the actual reproduction time TR is set to be longer than the toc and the actual reproduction time TR is recorded within the accuracy range.

(Embodiment 12) Corresponding to the invention of claim 11 The optical disk checking apparatus of the present invention is arranged such that the actual reproduction time is approximately within a predetermined threshold value Th while keeping the accuracy range of the reproduction time in which the cumulative TOC time is calculated. Keep a short record below,
By discriminating whether the actual reproduction time is less than or equal to this threshold Th, the disc satisfying this is discriminated as a regular disc.

That is, this optical disk check device is
It has the following configuration. A pickup 7 that reads the subcode data b in the lead-in area in which the optical disc 1 to be inspected is read, and Q data stored in the Q channel is sequentially read from the read subcode data b, and based on the accumulated time in the read Q data. Within the accuracy range (Ttoc ± 2 seconds) of the calculated reproduction time and within the specified value (threshold Th) of the reproduction time set to a value that does not exceed the actual reproduction time (TR), the main data c And a control circuit 2 for discriminating whether or not the disc is reproduced, and discriminating (based on the discrimination flow shown in FIG. 14) a regular optical disc that the actual reproduction time is within the specific value. It is the check device F.

More specifically, the optical disc check device F
Has almost the same configuration as the above-mentioned optical disk check devices A to E, and is different only in the disk discriminating flow of the control circuit 2. Therefore, only the disc discrimination flow of the control circuit 2 will be described here. The same components as those described above are designated by the same reference numerals, and the description thereof will be omitted.

Now, the detection operation flowchart shown in FIG. 14 is a flow for judging whether the actual reproduction time shown in FIG. 9 is within the threshold Th or not. Here, the track 1 is taken as an example. First, the TOC is read, the reproduction time of the track 1 is calculated (Ttoc in FIG. 9), the track 1 is actually reproduced, and the reproduction time is measured by a timer (not shown) (TR in FIG. 9). And TR is Ttoc
If it is within the range of −2 to Th, it is determined as a legitimate disc, and if not, it is determined as an illegally copied disc.

That is, the control circuit 2 constituting the optical disc checking device F confirms that the disc 1 to be inspected is set on the turntable (not shown), and when the user selects the check operation (play operation), In response, the control circuit 2 sends a disk rotation start control signal to the servo processing circuit 3 (900). When the servo processing circuit 3 receives the disk rotation start control signal, the servo processing circuit 3 sends to the driver 4 a motor drive signal for rotationally driving the spindle motor 6 in the rotation stopped state. The driver 4 amplifies the motor drive signal and outputs the motor drive signal to the spindle motor 6
Supply to. Before or after this, the servo processing circuit 3 sends a transfer signal for transferring the pickup 7 to the TOC to the driver 5 under the control of the control circuit 2. In this way, the spindle motor 6 rotates the disk 1 to be inspected set on the turntable by CLV, and the pickup 7 is transferred to the TOC to enable tracing.

The control circuit 2 temporarily stores the TOC data supplied from the pickup 7 in the built-in memory via the RF amplifier 8 and the RF signal processing circuit 9, and accesses the pickup 1 to the track 1 based on the stored TOC data. A control signal for doing so is output to the servo processing circuit 3 (910). Upon receiving this control signal, the servo processing circuit 3 sends a transfer signal for transferring the pickup 7 to the lead-in area to the driver 5 in response to this control signal. The driver 5 supplies a transfer signal obtained by amplifying this transfer signal to the pickup 7. In this way, the pickup 7 is transferred to the lead-in area and then to the track 1, and as described above,
After tracing the frame synchronization signal a, the subcode b can be traced.

After that, the pickup 7 traces the TOC portion of the disk 1 to be inspected, and the RF signal obtained by this is supplied to the decoder 9A constituting the RF signal processing circuit 9 via the RF amplifier 8. The decoder 9A decodes the RF signal supplied from the RF amplifier 8 and reads TOC data. Thus, the TOC detection signal is output from the decoder 9A to the servo processing circuit 3 and the TOC is output to the control circuit 2. By supplying the TOC detection signal, the servo processing circuit 3 detects that the disk 1 to be inspected is in the CLV (linear velocity) state, and sends a motor drive signal for maintaining this rotation speed. The control circuit 2 decodes the contents until the TOC supplied from the decoder 9A ends, and if the contents correspond to the CD-DA, the disc 1 to be inspected is discriminated to be the CD-DA, and it can be reproduced ( 910-930).

On the other hand, if the content of the TOC corresponds to the CD-ROM, the disc to be inspected 1 is discriminated as the CD-ROM (920).

When the control circuit 2 determines that the disk 1 to be inspected is a CD-ROM according to the contents of the TOC, it transfers the pickup 7 from the TOC area to the track 1 area and starts reproduction. And the track 1 of Q data in the lead-in
After collecting the cumulative time of 2, seek to track 1. Further, the control circuit 2 once clears the built-in timer and then sets the count-up enable state in synchronization with the actual start of reproduction of the track 1 (940 to 960). In this way, the track 1 is reproduced, and when the reproduction is completed, the timer is stopped and it is determined whether the timer value (actual reproduction time) is smaller than the threshold Th (970 to 990).
As a result, if the timer value is smaller than the threshold Th, the process proceeds to the next flow. If not, the disc is determined to be an illegal copy disc, and the illegal copy disc is ejected from the device (99
0-1010). If the timer value is smaller than the threshold value Th and is not within the accuracy (Ttoc ± 2) of the reproduction time calculated based on the cumulative time of the tracks 1 and 2, it is determined as an illegal copy disk, and the illegal copy disk is ejected from the device. (1020, 1000, 1010).

As described above, as shown in FIG. 9, the optical disc check device F determines whether the actual reproduction time is within the reproduction time accuracy calculated based on the TOC cumulative time and is smaller than the threshold Th. By doing so, it is possible to check whether the disc 1 to be inspected is a CD-DA, an illegally copied CD-ROM, or a regular CD-ROM.

[0123]

According to the optical disk of the present invention, (1) subcode data is formed by recording the appearance frequency and the appearance order of the Q mode stored in the Q channel forming the subcode data in a specific pattern. Set the cue data stored in the P channel to a specific value, and record it. (3) Record the appearance order of the control data stored in the Q channel that composes the subcode data in a specific pattern. The appearance order of specific bits in the control data stored in the Q channel forming the code data is recorded in a specific pattern, and (5) the number of tracks in the Q data stored in the Q channel forming the sub code data and The pointer is recorded in a specific order, and (6) the reproduction time data of each track information of the Q data stored in the Q channel that constitutes the subcode data is set and recorded with a specific accuracy. These discs, and the optical disc checking apparatus of the present invention reproduces the optical disc to be inspected to determine whether or not the disc conforms to the above aspects (1) to (6). (1) ~ (6)
It is possible to discriminate a disc that conforms to the above form as a legitimate disc, and discriminate a disc that does not conform to this form as an illegal copy disc. Further, when an illegally copied disc obtained by illegally copying the legitimate disc of the present invention is set in a normal CD-ROM drive for reproduction, the legitimate disc has a measure for preventing copy on the main data. Since it does not exist, it can be copied accurately to a CD write-once disc, etc., and no error occurs. A large number of duplicated discs can be produced by using it as a master, but even if the main data can be duplicated, the subcode cannot be duplicated. The copy code in is not detected and cannot be played. Therefore, it is possible to surely protect the copyright of the legitimate disc. further,
The check device (reproducer) of the present invention, when the power is normally turned on,
Since the TOC of the innermost circumference of the disc is read, in any of the embodiments, if the copy code is written in the small (inner circumference) of the track number, it can be detected in a short time whether or not the disc is a legitimate one. The physical location of is not limited. Furthermore, because the code is not written in the main data, it is difficult to analyze the copy guard,
Further, since the logical code is written, the burden of modifying the disk manufacturing apparatus is less than that of the method of writing by hardware. Further, in each of the embodiments, only the software modification of the reproducing device is required, and the hardware burden is not required. Therefore, it is advantageous in terms of cost and reliability, and any of the embodiments has IEC9.
Since it complies with the 08 standard, when the disc of the present invention is sold, it is easy to put it on the current distribution network.

[Brief description of drawings]

FIG. 1 is a diagram for explaining the contents of subcode data that constitutes a digital signal sequence obtained by reproducing an optical disc of the present invention.

FIG. 2 is a diagram for explaining a configuration of Q channel data.

FIG. 3 is a diagram for explaining the appearance order of Q mode.

FIG. 4 is a block configuration diagram of an optical disk check device of the present invention.

FIG. 5 is a diagram illustrating a pause period related to P-channel data.

[Fig. 6] Fig. 6 is a diagram for describing the order of appearance of controls forming Q channel data.

[Fig. 7] Fig. 7 is a diagram for describing the order of appearance of specific bits of control that form Q channel data.

FIG. 8 is a diagram for explaining an array of Q data in a lead-in area.

FIG. 9 is a diagram for explaining a reproduction time of a track forming Q data.

FIG. 10 is a detection operation flowchart for detecting the appearance order of Q mode.

FIG. 11 is a flowchart of a detection operation for detecting a relative time suitable for a rest period.

FIG. 12 is a flowchart of a detection operation for detecting the order of appearance of controls that form Q channel data.

FIG. 13 is a detection operation flowchart for detecting the final data of the track and pointer that form the Q data in the lead-in area.

FIG. 14 is a detection operation flowchart for detecting a reproduction time of a track forming Q data.

[Explanation of symbols]

 1 optical disc to be inspected 2 control circuit (discriminating means) 7 pickup (reading means) AF optical disc check device b subcode data c main data e1, e2, e3 signal string Th threshold

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location G11B 27/10 A 9369-5D

Claims (11)

[Claims] 1. A Q which is recorded in conformity with the IEC908 standard and has at least a data area in which subcode data which is data accompanying the main data is recorded, and which is stored in a Q channel forming the subcode data. An optical disc in which the appearance frequency and the appearance order of modes are recorded in a specific pattern. 2. An optical disc check device for discriminating an optical disc according to claim 1, wherein reading means for reading subcode data reproduced from the optical disc to be inspected, and Q stored in the Q channel from the read subcode data. The mode is sequentially read, and a determining unit that determines whether the appearance frequency and the appearance order of the read Q mode conform to a specific pattern is provided, and if the appearance frequency and the appearance order of the read Q mode conform to the specific pattern, it is normal. An optical disk check device characterized by being discriminated from other optical disks. 3. A data area recorded in accordance with the IEC908 standard and having at least subcode data which is data accompanying the main data recorded therein, and in a pause period of a P channel code forming the subcode data. An optical disc characterized in that a corresponding relative time is set and recorded in Q data. 4. An optical disc check device for discriminating an optical disc according to claim 3, wherein reading means reads the sub-code data by reproducing the optical disc to be inspected, and a pause period of the P channel code from the read sub-code data. An optical disc characterized in that it is provided with a discriminating means for discriminating whether the read relative time conforms to the specified value from the Q data, and discriminating whether the read relative time conforms to the specified value. Checking device. 5. A control which is recorded in conformity with the IEC908 standard and has at least a data area in which subcode data which is data accompanying the main data is recorded, and which is stored in a Q channel which constitutes the subcode data. An optical disc in which the appearance order of data is recorded in a specific pattern. 6. An optical disc check device for discriminating an optical disc according to claim 5, wherein reading means for reading subcode data reproduced from the optical disc to be inspected and control for storing the read subcode data in the Q channel. And a discriminating means for discriminating whether or not the appearance order of the read control data conforms to a specific pattern, and discriminates a normal optical disc when the appearance order of the read control data conforms to the specific pattern. An optical disk check device characterized by: 7. An optical disc check device for discriminating an optical disc according to claim 5, wherein reading means for reading subcode data reproduced from the optical disc to be inspected, and control for storing the read subcode data in the Q channel. And a determination means for determining whether or not the appearance order of the specific bits forming the read control data matches a specific pattern, and the appearance order of the specific bits forming the read control data is a specific pattern. A device for checking an optical disc, which discriminates that the optical disc is a legitimate optical disc if 8. A Q channel which complies with the IEC908 standard and has at least a data area in which subcode data which is data accompanying the main data is recorded, and which is included in the Q channel which constitutes the subcode data in the lead-in area. An optical disc in which the number of tracks and pointers in stored Q data are recorded in a specific order. 9. An optical disc check device for discriminating an optical disc according to claim 8, wherein reading means for reading sub-code data in a lead-in area in which an optical disc to be inspected is reproduced, and the read sub-code data is converted into a Q channel. And a determination means for determining whether the number of tracks and pointers in the read Q data are in a specific order, if the number of tracks and pointers in the read Q data match the specific order. An optical disk check device characterized by being discriminated as a legitimate optical disk. 10. A cumulative time of at least a Q data stored in a Q channel forming the subcode data in the lead-in area, the data area having at least a subcode data recorded as data accompanying the main data. An optical disc in which the main data c is recorded by setting a specific value of the reproduction time to a value within the accuracy range of the reproduction time calculated based on the above and the actual reproduction time does not exceed this. 11. An optical disc check device for discriminating an optical disc according to claim 10, wherein reading means for reading subcode data in a lead-in area in which an optical disc to be inspected is reproduced, and Q channel is read from the read subcode data. Read the playback time data of each track of the stored Q data,
The main data is reproduced within a reproduction time accuracy range calculated based on the accumulated time in the read Q data and within a specific reproduction time set to a value that does not exceed the actual reproduction time. An optical disc check device, comprising: a discriminating means for discriminating whether the optical disc is an authentic optical disc when the actual reproduction time is within the specific value.