JPH11185383A - Optical disk recording device and imparting method of device identifying information to its device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To record the device identifying information dispensing with complicated management at the time of manufacture without using a particular device in the manufacturing process of an optical disk recording device. SOLUTION: A CPU 11 of a CD-R/RW disk device 1 records data for an optical disk 15 based on the instruction from a host computer 2, determines random numbers generated by a random number generating part 11a to be a recorder specific number, stores a RID code (a particular code being intrinsic to every device as the identifying information of an optical disk recording device for specifying the optical disk device illegally recording data in an optical disk from the point of view of protecting the copyright) in a non-volatile memory 14, after recording the data in the optical disk 15 based on the instruction from the host computer 2, the CPU reads out the RID code from the non-volatile memory 14 and writes it in the optical disk 15 by a drive 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention
-CD-R / R for recording data on optical disks such as RW
The present invention relates to an optical disk recording device such as a W device and a method of assigning device identification information to the optical disk recording device.

[0002]

2. Description of the Related Art In recent years, in order to protect the copyright of data recorded on a recording medium, a method of encrypting the data so that it cannot be used illegally (for example, see Japanese Patent Application Laid-Open No. 9-54691), There has been proposed an apparatus (for example, see Japanese Patent Application Laid-Open No. 9-500225) that gives unique information to a recording medium based on the noise of a read signal from a computer.

[0003] Also in an optical disk recording device such as a CD-R / RW device, in order to identify an optical disk recording device that has illegally recorded data on an optical disk from the viewpoint of copyright protection, the device of the optical disk recording device is specified. A method of recording a special code unique to each device as identification information has been proposed.

[0004] This special code is called "RID code". When an illegally copied optical disk is found in the market, the optical disk recording used for the illegal copy is performed based on the RID code recorded on the optical disk. By specifying the device, it is intended to detect illegal copyrs and prevent unauthorized copy.

For the RID code, the following three types of data have been proposed. (1) Group 1: Manufacturer code (Manufactu
err Code)... I1, I2, I3 (6 bits of data each) (2) Group 2: Model code (Type Code)
... I4, I5 (each of which is 6-bit data), I6, I
7 (the above is 4-bit data) (3) Group 3: Recorder unique number (Recorder Unique Number) corresponding to device identification information
r)... I8, I9, I10, I11, I12 (each of which is 4-bit data)

[0006] By recording the data of I1 to I12 in a subcode or a part of a data area on an optical disk and reproducing the part, a manufacturer, a model and an apparatus can be specified. The same data may be assigned to a plurality of products for the manufacturer code and the model code, but a different recorder unique number must be assigned to each device.

Therefore, conventionally, when an optical disk recording device is manufactured, a serial number on a label printed or affixed to the device is read, and device identification information based on the serial number is written in an internal memory. And read the device identification information from the optical disk.

[0008]

However, as described above, in order to read the serial number on the optical disk recording device and record the device identification information based on the serial number in the internal memory of each device, it is necessary to perform a manufacturing process. There is a problem that a special device is required, and management during manufacturing becomes complicated.

For example, when the serial number of a device is written as device identification information in a memory on a printed circuit board (PCB) of an optical disk recording device, it is written in a final step in order to match the serial number attached to the device. And if repairs are made, the serial numbers may not match.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has as its object to record device identification information that does not require a special device in a manufacturing process and that does not require complicated management during manufacturing. And

[0011]

According to the present invention, there is provided an optical disc recording apparatus for connecting a host computer and recording data on an optical disc based on an instruction from the host computer.
Random number generating means for generating a random number, device identification information determining means for determining a random number generated by the means as identification information of the device, and device identification information for recording the device identification information determined by the means on the optical disc A recording means is provided.

Further, the apparatus identification information determining means is caused to start generating a random number by the random number generating means when the power is turned on,
It is preferable that the random number generation unit stops generating a random number when a predetermined operation is performed by an external operation, and the random number obtained at the time of the stop is determined as device identification information.

Further, it is preferable that the predetermined operation is a disk ejection operation performed first after the power is turned on. Alternatively, the predetermined operation may be a disk insertion operation performed first after the power is turned on.

Also, in an optical disc recording apparatus for connecting a host computer and recording data on the optical disc based on an instruction from the host computer, real time information acquiring means for acquiring real time information generated by the host computer. And device identification information storage means for storing real-time information obtained by the means as device identification information of the device, and device identification information recording means for recording the device identification information stored in the means on the optical disk. Good. Further, the device identification information storage means may be incorporated in a central processing unit that controls the entire device.

An optical disk recording apparatus for obtaining real-time information at the time of manufacture or inspection of an optical disk recording apparatus for recording data on an optical disk and assigning the real-time information to the optical disk recording apparatus as device identification information of the optical disk recording apparatus. Also, a method for providing device identification information to a device is provided. Further, it is more preferable to add information indicating a manufacturing place or an inspection place of the optical disk recording device to the device identification information.

According to the optical disk recording apparatus of the present invention, a random number is generated, the generated random number is determined as identification information of the apparatus, and the determined apparatus identification information is recorded on the optical disk. Since the recording device determines its own device identification information and records it on the optical disk that records data, it does not use special devices in the manufacturing process,
Device identification information that does not require complicated management during manufacturing can be recorded.

Further, the optical disk recording apparatus according to a second aspect of the present invention starts the generation of a random number when the power is turned on, stops the generation of the random number when performing a predetermined operation by an external operation, and stores the random number obtained at the time of the stop. Since the device identification information is determined, the randomness of the device identification information can be ensured.

Further, in the optical disk recording apparatus according to the third aspect of the present invention, the generation of random numbers is stopped at the time of the first disk ejection operation after the power is turned on. Device identification information can be determined.

Furthermore, in the optical disk recording apparatus according to the present invention, random number generation is stopped at the time of the first disk insertion operation after the power is turned on. Can determine the device identification information.

According to a fifth aspect of the present invention, an optical disk recording apparatus acquires real time information generated by a host computer connected to enable data communication, and uses the acquired real time information as apparatus identification information of the apparatus. Remember,
Since the device identification information is recorded on the optical disc, it is possible to reduce complicated processing for determining the device identification information by using a random number each time.

Further, in the optical disk recording apparatus according to the present invention, the function of storing the apparatus identification information is incorporated in a central processing unit that controls the entire apparatus. , It is possible to prevent the device identification information from being illegally changed.

According to a seventh aspect of the present invention, there is provided a method for assigning apparatus identification information to an optical disk recording apparatus, comprising the steps of obtaining real-time information at the time of manufacture or inspection of an optical disk recording apparatus for recording data on an optical disk, and Since the device identification information of the optical disk recording device is given to the optical disk recording device, the device identification information which does not require complicated management during manufacturing without using a special device in the manufacturing process is given to the optical disk recording device. Can be.

Further, in the method for assigning device identification information to an optical disk recording device according to claim 8 of the present invention, information indicating a manufacturing location or an inspection location of the optical disk recording device is added to the device identification information. When the device identification information is simultaneously assigned to the optical disk recording device, it is possible to prevent the same device identification information from being assigned.

[0024]

Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a CD-R / RW disk device according to one embodiment of the present invention. A broken line with an arrow in the drawing indicates a flow of control between the units, a solid line with an arrow indicates a flow of data, and a thick line with an arrow indicates the flow of an RID code.

The CD-R / RW disk device 1 is realized by a microcomputer, is connected to a host computer 2 so as to be able to perform data communication, and is capable of additionally recording a CD-R or rewritable based on an instruction from the host computer 2. It records and reproduces data on and from a recordable optical disc 15 such as a CD-RW.

The CPU 11 controls the overall operation of the apparatus, and reads the specified data from the optical disk 15 by the drive 10 at the time of the reproduction processing of the data specified by the host computer 2, and buffers the data through the buffer control / interface circuit 12. After temporarily storing the data in the memory 13, the data stored in the buffer memory 13 is read out by the buffer control / interface circuit 12 and sent to the host computer 2.

In recording the data sent from the host computer 2, the data from the host computer 2 is temporarily stored in the buffer memory 13 via the buffer control / interface circuit 12. After that, the buffer memory 13 is controlled by the buffer control / interface circuit 12.
Is read out and sent to the drive 10,
The data is written to a predetermined recording area of the optical disk 15 by the drive 10.

The CPU 11 further includes a random number generation unit 11a
RID, which is its own device identification information based on the random number generated in
The code is generated and the nonvolatile memory 14 such as an EEPROM is
And records the RID code on the optical disk 15. The RID code includes a manufacturer code, a model code, and a recorder unique number. The manufacturer code and the model code are stored in the nonvolatile memory 14 in advance.
The CPU 11 creates the recorder unique number by itself.

That is, in order to realize the process of recording the RID code on the optical disk 15, the CPU 11 and the random number generating section 11a are provided with a random number generating means for generating a random number, and a random number generated by the means. The CPU 11, the drive 10, and the non-volatile memory 14 function as a device identification information determining unit that determines
It functions as a device identification information recording unit that records the device identification information determined by the device identification information determination unit on an optical disc.

Further, as the device identification information determining means,
Means for starting the generation of random numbers by the random number generation means upon power-on, stopping the generation of random numbers by the random number generation means when performing a predetermined operation by an external operation, and determining the random numbers obtained at the time of the stop as device identification information It is good to Further, the predetermined operation may be a disk ejecting operation performed first after power is turned on or a disk inserting operation performed first after power is turned on during a recording operation on a disk.

On the other hand, the host computer 2 has a CPU,
It is realized by a microcomputer including a ROM, a RAM, and the like, and records and reproduces data on an optical disk by the CD-R / RW disk device 1.

Next, the CD-R / RW disk device 1
The process of recording the RID code on the optical disk in the above will be described. FIG. 2 is a flowchart showing a process for recording an RID code when recording data on an optical disk.

In this process, when the power is turned on (power is turned on) in step (indicated by "S" in the figure) 1, the process proceeds to step 2 where the CPU starts the generation of random numbers by the operation of the random number generation unit. Then, the drive is instructed to start an initialization operation, and the drive starts initialization operations such as rotation of an optical disk, lighting of a laser beam of an optical pickup, and lock-on of a servo.

Proceeding to step 3, the CPU monitors the operation of the drive and determines whether or not the drive is in a ready state indicating that preparation for recording and reproducing data on the optical disk has been completed. , Step 4
Proceed to to stop the generation of random numbers, determine the value obtained at the time of the stop as the recorder unique number, and proceed to step 5 to store the RID code including the manufacturer code, model code, and recorder unique number in the nonvolatile memory. I do.

Proceeding to step 6, it is determined whether or not a data recording command has been received from the host computer via the buffer control / interface circuit. If so, the process proceeds to step 7 where the data sent from the host computer is buffered. The data is temporarily stored in a buffer memory via a control / interface circuit and sent to a drive via the buffer control / interface circuit, and the drive writes data to an optical disk.

Proceeding to step 8, the CPU reads the RID code from the non-volatile memory, proceeds to step 9 and sends the RID code to the drive, writes the RID code in a predetermined area of the optical disk by the drive, and ends the processing.

In this manner, the CD-R / RW disk device 1 generates a random number when the power is turned on, determines the generated random number as a recorder unique number, and, together with a manufacturer code and a model code, stores the random number in its own device. It is stored as an RID code that is identification information, and is used when recording data on an optical disc.
Since the D code is also recorded on the optical disc, it is possible to determine the identification information of the apparatus itself and record it on the optical disc.

Therefore, it is not necessary to use a special device in the manufacturing process to record the identification information of each device in the CD-R / RW drive device, and it is not necessary to manage the device identification information at the time of manufacture. Become.

Further, the generation of random numbers is started when the power is turned on, the generation of random numbers is stopped when data is recorded by an external operation from the host computer, and the random numbers obtained at the time of the stop are determined as device identification information. The randomness of information can be ensured.

Next, in the above processing, the time t from the start of the random number generation to the determination is determined by a substantially constant time from when the power is turned on to when the drive is ready, so that the recorder unique number is always the same value. There is a risk of becoming. Therefore, if the drive continues to generate a random number even after the drive is ready, and stops generating the random number when the eject button of the optical disc is first pressed and determines the RID code, the randomness of the RID code can be improved. Can be assured.

FIG. 3 shows the R determined at the time of ejecting the optical disk.
It is a flowchart which shows the process at the time of recording an ID code. In this process, when the power is turned on (power is turned on) in step 11, the process proceeds to step 12, where the CPU starts generating random numbers by the operation of the random number generation unit, and instructs the drive to start an initialization operation. Then, the drive starts initialization operations such as rotation of the optical disk, lighting of the laser beam of the optical pickup, lock-on of the servo, and the like.

Proceeding to step 13, the CPU monitors the operation of the drive and determines whether or not the drive is in a ready state indicating that preparation for recording and reproducing data on the optical disk is completed. Then, the process proceeds to step 14, where it is determined whether or not the eject button (disc eject instruction button) is pressed.

If the eject button is depressed in step 14, the process proceeds to step 15 to stop the generation of random numbers. The value obtained at the time of the stop is determined as the recorder unique number. , An RID code including a manufacturer code, a model code, and a recorder unique number.

Proceeding to step 17, it is determined whether or not a data recording command has been received from the host computer via the buffer control / interface circuit. If so, the process proceeds to step 18 where the data sent from the host computer is buffered. The data is temporarily stored in a buffer memory via a control / interface circuit and sent to a drive via the buffer control / interface circuit, and the drive writes data to an optical disk.

Proceeding to step 19, the CPU reads the RID code from the nonvolatile memory, proceeds to step 20, sends the RID code to the drive, writes the RID code in a predetermined area of the optical disk by the drive, and ends the processing.

Alternatively, the generation of random numbers may be started when the power is turned on, and the generation of random numbers may be stopped when the optical disc is first inserted to determine the RID code.

FIG. 4 shows the R determined when the optical disk is inserted.
It is a flowchart which shows the process at the time of recording an ID code. In this process, when the power is turned on (power is turned on) in step 21, the process proceeds to step 22, where the CPU starts generating random numbers by the operation of the random number generation unit, and instructs the drive to start an initialization operation. Then, the drive starts initialization operations such as rotation of the optical disk, lighting of the laser beam of the optical pickup, lock-on of the servo, and the like.

Proceeding to step 23, the CPU monitors the operation of the drive and determines whether or not the drive is ready to indicate that the drive is ready to record and play back data on the optical disk. , To determine whether or not the optical disk has been inserted.

If the optical disk is inserted in the judgment of step 24, the process proceeds to step 25 to stop the generation of random numbers, the value obtained at the time of the stop is determined as the recorder unique number, and the process proceeds to step 26 to store the data in the nonvolatile memory. An RID code including a manufacturer code, a model code, and a recorder unique number is stored.

Proceeding to step 27, it is determined whether or not a data recording command has been received from the host computer via the buffer control / interface circuit. If so, the process proceeds to step 28, where the data sent from the host computer is buffered. The data is temporarily stored in a buffer memory via a control / interface circuit and sent to a drive via the buffer control / interface circuit, and the drive writes data to an optical disk.

The CPU proceeds to step 29 to read the RID code from the non-volatile memory, proceeds to step 30 to send the RID code to the drive, writes the RID code in a predetermined area of the optical disk by the drive, and ends the processing.

In this way, when the eject button is first pressed after the power is turned on or when the optical disk is inserted for the first time, the generation of random numbers is stopped, and the value at that time is determined as the recorder unique number. Therefore, it is possible to determine the random number generation time by an artificial action such as pressing an eject button or inserting an optical disc, each time having a different timing, and it is possible to make a recorder unique number for an optical disc different each time. Can be ensured.

Next, a CD-R according to another embodiment of the present invention will be described.
The / RW disk device will be described. FIG. 5 is a block diagram showing a configuration of a CD-R / RW disk device according to another embodiment of the present invention. In FIG. The CPU 11 of this CD-R / RW disk device does not have a random number generator, and the CPU 11 obtains the time data generated by the real time timer 2a of the host computer 2 and determines the time data as a recorder unique number. I do.

That is, the CPU 11, the buffer control / interface circuit 12, and the non-volatile memory 14 function as real-time information acquisition means for acquiring real-time information generated by the host computer.
The U11, the non-volatile memory 14, and the drive 10 function as a device identification information recording unit that records the real time information acquired by the real time information acquisition unit as the device identification information of the device on the optical disc.

Further, the host computer 2 transmits the RI to the CD-R / RW disk device 1 according to the present invention.
It performs the function of giving the time data that is the basis of the D code. That is, the host computer 2 has a function of obtaining real-time information at the time of manufacture or inspection of an optical disk recording device that records data on an optical disk, and providing the real-time information to the optical disk recording device as device identification information of the optical disk recording device. . Further, it has a function of adding information indicating a manufacturing place or an inspection place of the optical disk recording device to the device identification information.

Next, the CD-R / RW disk device 1
The recording process of the RID code on the optical disk in the above will be described. For example, in an inspection process after the manufacture of the CD-R / RW disk device 1, the host computer 2 uses the time data generated by the real time timer 2a during the inspection of the connected CD-R / RW disk device 1 for the CD.
-Create an RID code including the recorder unique number, the manufacturer code, and the model code as the recorder unique number of the R / RW disk device 1 and transmit it to the CD-R / RW disk device 1.

CPU 1 of CD-R / RW disk device 1
1 obtains an RID code based on the time data generated by the real time timer 2a of the host computer 2 via the buffer control / interface circuit 12,
The ID code is stored in the nonvolatile memory 14.

FIG. 6 is a diagram showing an example of the format of an RID code based on real time data. This RID code is obtained by checking the manufacturer code such as the manufacturer name and the manufacturing line name in the first I1 to I3, the model code including the model number and the date in the next I4 to I6, and the last I7 to I12 in the inspection. The recorder-specific numbers each consisting of real-time data of hours, minutes and seconds are stored.

In this manner, the RID code, which is the identification information of the CD-R / RW disk device, can be easily assigned to the CD-R / RW disk device by using the host computer, and the RID code is not a serial number. , C
For a DR / RW disk device, it is possible to eliminate the complexity of production management during manufacturing without using a special device in the manufacturing process. In addition, at the same time, C
When the RID code is assigned to the DR / RW disk device, the same RID code can be prevented from being assigned.

Thus, the CD-R / RW disk device 1
Writes the RID code stored in the nonvolatile memory 14 as it is when recording data on the optical disk. Therefore, the CPU of the CD-R / RW disc device
However, it is possible to reduce complicated processing such as determining the recorder unique number each time using a random number.

Next, when the RID code is stored in the non-volatile memory 14 independently mounted on the PCB as in the above-described CD-R / RW disk device 1, the storage location of the RID code can be easily determined. Therefore, there is a possibility that the RID code is tampered with or removed. Therefore, the storage location of the RID code may be made invisible from outside.

FIG. 7 is a block diagram when a nonvolatile memory for storing an RID code is built in the CPU. As shown in FIG. 1, a CPU core 20 and a non-volatile memory 21 are built in the CPU 11,
The RID code based on the random number generated by the core 20 is stored in the nonvolatile memory 21.

For example, when the power is turned on, the CPU core 20 starts generating a random number, instructs the drive 10 to start an initialization operation, and the drive 10
Initialization operations such as rotation of 5, rotation of the laser beam of the optical pickup, lock-on of the servo, etc. are started.

The CPU core 20 monitors the operation of the drive 10 and stops the generation of random numbers when the drive 10 is in a ready state in which data can be recorded on and reproduced from the optical disk 15. A recorder ID is determined, and an RID code including a manufacturer code, a model code, and a recorder ID is stored in the nonvolatile memory 21.

Thereafter, when a data recording command is received from the host computer 2 via the buffer control / interface circuit 12, the data sent from the host computer 2 is temporarily stored in the buffer memory 13 via the buffer control / interface circuit 12. Then, the data is sent to the drive 10 via the buffer control / interface circuit 12, and the drive 10 writes data to the optical disk 15.

Then, the CPU core 20 reads the RID code from the nonvolatile memory 21 and sends the RI code to the drive 10.
D code is sent, and the optical disk 15 is
The RID code is written in a predetermined area of.

As described above, since the non-volatile memory for storing the RID code is incorporated in the CPU for controlling the entire apparatus, the storage location of the RID code can be hardly recognized from the outside, and the RID code can be illegally stored. Can be kept unchanged. Therefore, it is possible to maintain the validity of the operation of specifying the recording device of the unauthorized copy source using the RID code.

[0068]

As described above, according to the optical disk recording apparatus and the method of assigning the apparatus identification information to the optical disk recording apparatus according to the present invention, a special apparatus is not used in the manufacturing process, and complicated management at the time of manufacturing is performed. Can record unnecessary device identification information.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a CD-R / RW disk device according to an embodiment of the present invention.

FIG. 2 is a flowchart showing a process when the CD-R / RW disc device shown in FIG. 1 records an RID code when recording data on an optical disc.

FIG. 3 is a flowchart showing a process when the CD-R / RW disc device shown in FIG. 1 records an RID code determined when an optical disc is ejected.

FIG. 4 is a flowchart showing processing when the CD-R / RW disk device shown in FIG. 1 records an RID code determined when an optical disk is inserted.

FIG. 5 is a block diagram showing a configuration of a CD-R / RW disk device according to another embodiment of the present invention.

FIG. 6 is a diagram illustrating an example of a format of an RID code based on real-time data.

FIG. 7 shows a CD-R / R according to still another embodiment of the present invention.
FIG. 3 is a block diagram illustrating a configuration of a W disk device.

[Explanation of symbols]

 1: CD-R / RW disk device 2: host computer 2a: real-time timer 10: drive 11: CPU 11a: random number generator 12: buffer control / interface circuit 13: buffer memory 14, 21: nonvolatile memory 15: Optical disc 20: CPU core

Claims (8)

[Claims] 1. An optical disk recording apparatus for connecting a host computer and recording data on an optical disk based on an instruction from the host computer, comprising: a random number generating means for generating a random number; An optical disc recording apparatus comprising: device identification information determining means for determining as device identification information; and device identification information recording means for recording the device identification information determined by the means on the optical disc. 2. The optical disk recording apparatus according to claim 1, wherein said apparatus identification information determining means starts generating a random number of said random number generating means upon power-on, and performs a predetermined operation by an external operation. An optical disk recording device, which is a means for stopping generation of a random number and determining the random number obtained at the time of the stop as device identification information. 3. The optical disk recording apparatus according to claim 2, wherein the predetermined operation is a disk ejection operation performed first after power is turned on. 4. The optical disk recording device according to claim 2, wherein the predetermined operation is a disk insertion operation performed first after power-on. 5. An optical disc recording apparatus for connecting a host computer and recording data on an optical disc based on an instruction from the host computer, wherein real time information acquiring means for acquiring real time information generated by the host computer. A device identification information storage unit for storing the real time information obtained by the unit as device identification information of the device; and a device identification information recording unit for recording the device identification information stored in the unit on the optical disc. An optical disk recording device, characterized in that: 6. The optical disk recording apparatus according to claim 1, wherein said apparatus identification information storage means is incorporated in a central processing unit that controls the entire apparatus. Recording device. 7. A method for obtaining real-time information at the time of manufacture or inspection of an optical disk recording device for recording data on an optical disk, and adding the real-time information to the optical disk recording device as device identification information of the optical disk recording device. To assign device identification information to an optical disk recording device to be used. 8. The method for assigning device identification information to an optical disk recording device according to claim 7, wherein information indicating a manufacturing location or an inspection location of the optical disk recording device is added to the device identification information. A method for assigning device identification information to a device.