JP2002343018A - Controller, optical disk unit, and control method for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a controller having a structure of an IC(integrated circuit) which can freely change the predetermined data stored in a ROM with inexpensive constitution. SOLUTION: The controller having the structure of IC has the ROM 13 for storing the predetermined data, a control part 11 for controlling operation of the predetermined object based on the predetermined data, and a ROM content change part 14 for generating patch data at a RAM 12 based on new data given from an outside when change instructions for the predetermined portion of the predetermined data are given from the outside. The predetermined data in the ROM 13 can be substantially changed by carrying out control processing of the predetermined object for the predetermined portion based on the patch data.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a control device having an IC configuration having a ROM for storing control data, and an optical disk device using the same.

[0002]

2. Description of the Related Art With the recent spread of microcomputers, the operation of various devices has been controlled from a control circuit constituted by logic circuits to a CPU (Central Processing Unit).
And an IC (Integr) for controlling a control target according to control data stored in an internal ROM (Read Only Memory).
The control method has been replaced by a microcomputer system built in an ated circuit.

In the control method using such a microcomputer system, since the control data is stored in a ROM,
When a change in the control data or the like occurs, it is necessary to replace the ROM itself with a new one storing new control data. Therefore, as a method of changing the mask ROM data in the IC, the following can be considered: changing the mask of the IC itself; using a non-volatile ROM instead of the mask ROM; rewriting the non-volatile ROM when changing; Instead, a RAM may be used to download data by an external controller each time the power is turned on, or a one-time ROM may be used as the mask ROM to enable data change.

As a similar method among them, there is a technique relating to a microcomputer disclosed in Japanese Patent Application Laid-Open No. H11-288410. In this method, program data is rewritten using a flash memory which is easy to use, and can be rewritten relatively easily.

Further, in an optical disk device such as a DVD (Digital Versatile Disk) using the above-described control device, there is a CSS (content scramble system) as a copy protection system for DVD video contents. This is a data encryption system, which is a method for preventing a video film from being directly copied from a disc.

Originally, the CSS algorithm was not disclosed. However, as in October 1997, a hacker decrypted the CSS algorithm and published it on the Internet. There is a risk that it will. In the worst case, DVDs will be released one after another by changing the algorithm of CSS itself
In some cases, it is necessary to protect the video contents, and it is expected that measures must be taken for both ease of changing the algorithm on the device side and protection against information leakage.

In order to appropriately change the algorithm on the device side in order to respond to this, it is necessary to change the mask of the mask ROM as needed if the configuration is implemented as a mask ROM inside the IC.

[0008]

However, according to these methods, it takes a few months to change the mask, which makes it difficult to respond immediately at the time of mass production.
There are problems that the cost of the IC is high, that the data must be stored in the external controller, the information in the mask ROM may leak, and that the cost of the IC increases. . As described above, according to the conventional method, there is a problem that it is difficult to change ROM data inside the IC freely at low cost and without secret leakage.

The present invention has been made in view of such circumstances, and has an inexpensive configuration without leaking information.
It is an object of the present invention to provide a control device capable of freely changing ROM data in an IC.

[0010]

SUMMARY OF THE INVENTION The present invention is a control device having an IC configuration containing control data, wherein the storage device stores at least first control data in a nonvolatile storage area, A first control unit for controlling an operation of a predetermined object based on the first control data to be stored, and a change control unit for changing a predetermined portion of the first control data in the storage unit, when a change instruction is received from outside. Changing means for generating second control data in a predetermined area based on the given new control data; and controlling the predetermined portion in accordance with the first control data stored in the storage means. And a second control means for controlling an operation of a predetermined object based on the second control data generated by the means.

According to the present invention, with the above-described structure, R
Upon receiving an instruction to change the control data in the OM, patch data is generated in the RAM according to the new control data.
For example, when performing a control operation, control is normally performed in accordance with control data in a ROM, and only a portion to be changed in a program performs a control operation in accordance with patch data in a RAM. This allows RO that cannot be changed
The control data in M can also be changed in program content with an inexpensive configuration.

According to the present invention, there is provided an optical disk apparatus for processing an optical disk having a concentric or spiral storage area, a rotating means for rotating the optical disk at a predetermined rotation speed, and a laser beam on the optical disk on which the rotating means rotates. Irradiates the reproduced signal generated by the reflected wave, and performs a predetermined process on the reproduced signal generated by the reproduced signal generating device to reproduce a signal stored in the optical disc. Reproducing means for performing the processing, storing means for storing at least the first control data in the nonvolatile storage area, and externally provided when a change instruction is received to change a predetermined portion of the first control data in the storing means. Changing means for generating second control data in a predetermined area based on the new control data, and based on the first control data stored by the storage means. An optical disk device, further comprising a control unit for controlling at least operations of the rotating unit and the reproducing unit based on the second control data generated by the changing unit for the predetermined portion. is there.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a control device according to the present invention will be described in detail with reference to the drawings.

<First Embodiment> In a first embodiment, R
AM (Random Access Memory), ROM (Read Only Me)
The present invention provides a control device having a memory element such as a mory), a CPU, and the like, having a ROM data rewriting function of the present invention. FIG. 1 is a system block diagram of a control device according to an embodiment of the present invention, FIG. 2 is an example of a data format of ROM change patch data, and FIGS.
FIGS. 5 and 6 are examples of flowcharts showing a procedure for changing the ROM, and FIGS. 5 and 6 are examples of flowcharts showing another procedure for changing the ROM according to the present invention.

In FIG. 1, the control device according to the present invention comprises:
It has a control unit 11 (which may include a CPU) provided on the IC device 1, a rewritable RAM 12, and a ROM 13 for storing control data such as a control program. A ROM content changing unit 14 is connected to the control unit 11 and the like, and has a ROM content changing unit 14 which is a feature of the present invention. Status signal circuit 16, descramble circuit 17, verify circuit 18, I / F control circuit 19, ROM controller / RA
It has an M controller 20, a data change circuit 21, a checksum circuit 22, and a ROM version comparison circuit 23. Further, as an interface to the outside, the control unit 1
1 and a host interface 25 connected thereto.

The control device further includes a system microcomputer 31 including a CPU and the like connected to the microcomputer interface 24 of the IC device 1 and an external RO connected thereto.
M (non-volatile ROM) 32 is provided.
M32 has a spare area. As an example, the host interface 25 is connected to a host computer 33. Further, the system microcomputer 31 and the IC device 1
Are supplied with a system reset signal.

In such a configuration, the control device of the present invention substantially changes the data stored in the ROM as follows in accordance with the flowcharts of FIGS. First, the procedure for downloading patch data from the host interface 25 to the CPU of the system controller 31 from the host interface 33 to the CPU of the system controller 31 will be described although not shown in the flowchart.
In this procedure, the host computer 33 first requests the CPU of the system controller 31 to transmit patch data via the host interface 25 and the microcomputer interface 24. The CPU of the system controller 31 determines whether or not the patch data can be received according to the current system state, and returns the result to the host computer 33. The system controller 31 at this time
If the reply of the CPU can receive the patch data, the host computer 33 transmits the patch data through the host interface 25 and the microcomputer interface 24. The CPU of the system controller 31 receives the patch data transmitted from the host computer 33,
The patch data is stored in an area of the external ROM 32 dedicated to patch data. In this case, the external ROM 32 needs to be an electrically rewritable nonvolatile ROM. After the transmission of the patch data, data verification is performed between the host computer 33 and the CPU of the system controller 31.
External ROM for CPU management of the system controller 31
Confirm that the data has been correctly transferred to 32, and if the confirmation is OK, end the download. These procedures are the same as the procedures for rewriting the firmware of the DVD-ROM drive.

Next, a procedure for reflecting the downloaded patch data in the operation of the ROM 13 in the IC will be described. CPU of system controller 31
Means that the patch data is always
Transfer to C1. In the block diagram of FIG. 1 and the flowcharts of FIG. 3 and FIG.
The internal ROM content change unit 14 fixes the control unit 11 in the reset state and clears the content of the entire area of the internal RAM (S11). After clearing, the ROM content changing unit 14 inside the IC 1 checks the presence or absence of patch data by a method such as an external interrupt to the CPU of the system controller 31 (S12). Here, if there is no patch data, the ROM content changing unit 14
Generates a status signal indicating no data change,
The reset signal to the control unit 11 is released (S1
4). However, if there is patch data, the ROM content change process is started (S13).

The procedure of the ROM content changing process is as follows. First, the control unit 11 confirms that it is within the change processing time (S15),
The patch data is obtained from U and stored in the RAM 12 (S16). At the time of this acquisition, the presence or absence of a data transfer error may be checked by a method of adding a data checksum by the checksum circuit 22 (S17). In this case, if there is a data checksum error, the patch data stored in the RAM 12 area is deleted, and the patch data is again requested to the CPU of the system controller 31. If there is no problem, the process proceeds to the next step, where the acquired patch data is descrambled by the descrambling circuit 17 of the ROM content changing unit 14 and stored again in the RAM 12 (S18). Thereafter, it is confirmed that the descrambled patch data matches the regular patch data format (S19, S20).

FIG. 2 shows an example of the format of the patch data. In FIG. 2, the format of the patch data shown in this embodiment is such that one frame means one byte, and the following values are stored according to the value of the header. Hooda, 1 *
Is the start ROM address of the deletion, 2 * is the number of bytes of ROM data to be deleted, 3 * is the additional data, 4 * is the start RAM address of the addition, 5 * is the number of bytes of the additional RAM data, and 6 * through B * are The reserved area, C *,
Checksum, D * is ROM version information, E *
Indicates the patch data start position, and F * indicates the patch data end position and the number of bytes of the patch data. The lower 4 bits represent the data length as shown in FIG. 2, and the data length is "0" for those that do not need to be represented or that do not exist. Also, the patch data format is valid at least for the oblique lines and the footer. At this time, the header values “38” and “3”
The 2 "portion becomes the ROM data to be added.

As a method of confirming that the format of the patch data conforms to the normal format, it is sufficient to check the relationship between the data strings for the information of each header and whether the checksum data is correct. If there is an error, the CPU of the system controller 31 is again requested to transmit the patch data, and the patch data is newly received (S16).

If a data error occurs even after the above-mentioned patch data request and check have been performed several times, the RAM 12 is cleared, a status signal indicating no patch data is issued to the control unit 11, and a reset signal to the control unit 11 is issued. Is released (S21). Also, C of the system controller 31
The fact that the patch data is abnormal is transmitted to the PU as a status (S22).

If it is confirmed that there is no abnormality in the above patch data, the process proceeds to the next step. ROM content change unit 14
Compares the data version of the ROM data described on the ROM 13 with the data version of the patch data (S23). The version information of the patch data in this case means the version of the ROM 13 to be changed. In this embodiment, if the patch data version is older than the ROM data version, the patch data is not reflected on the system. The reason is to prevent system runaway due to patch data inconsistency when ROM data is changed. When the version of the patch data is inconsistent, the ROM content changing unit 14 sends a message indicating the version inconsistency to the CPU of the system controller 31, and the ROM content changing unit 14 notifies the control unit 11 that there is no patch data. A status signal is issued, and the reset signal to the control unit 11 is released (S
28).

If the version of the ROM data is older than the patch data, the process proceeds to the next step. The ROM content change unit 14 develops the ROM change data on the address of the RAM 12 specified in the patch data based on the information in the patch data. At the same time, information on the start address and data length of the data to be changed on the ROM 13 is also stored in the RAM 13.
12 is stored (S24). Then, the ROM content changing unit 14 stores the data string to be changed on the ROM 13 and the RA
Compare with the changed data on M12. If both match (S26), the changed data is destroyed (S2).
7). The meaning of this destruction is, for example, when a third party performs an action of changing the contents of the ROM data and debugging the system operation, and if the operation is normal in the operation debugging, it is determined that the data matches before and after the ROM change. This is a countermeasure against the risk that the contents of the internal ROM are analyzed and confidential data is leaked.

As a specific example of the data destruction method, there is a method as shown in FIG. 7, in which the data destruction coefficient N is determined based on the patch data addition value. That is, the patch data is added on the one-byte memory in the order of the patch data (S61). As a result, according to the size of N, for example, the size of the added value N, 0H ≦ N ≦ 3FH (S62), the changed data is destroyed by the destruction method A (S6).
5) If 40H ≦ N ≦ 7FH (S63), destroy by destruction method B (S66); if 80H ≦ N ≦ 8FH (S63), destroy by destruction method C (S67), 8H ≤
When N ≦ 8FH (S64), it is broken by the breaking method D (S68).

Here, one example of the destruction method A is to invert all the bytes of the changed data, one example of the destruction method B is to AND all the bytes of the changed data with N, and one example of the destruction method C is
Nesting all bytes of changed data with N, destruction method D
EXOR all bytes of the change data with N,
And so on. What these techniques mean is:
There is no problem as long as the coefficient is such that the same destruction data is obtained when the same data is used. In other words, when the same patch data is transmitted several times, if the debugging result differs every time when the system operation is debugged, there is a risk that the contents of the internal ROM may be analyzed by a third party. Therefore, in these methods, this is avoided and the debugging result is made the same.

Next, irrespective of the presence or absence of the destruction processing, the ROM content changing unit 14 generates link information of the ROM change on the RAM (S24). It is considered that the link information differs depending on the ROM data processing mode of the control unit 11. In this embodiment, the patch data format can be adapted to all possible control units 11, including having a spare area. The following cases are conceivable for link information for associating ROM data with its changed data.

FIG. 8 shows an embodiment of the link data corresponding to the specifications of the control unit 11. First, the control unit 11
Is a CPU, and the ROM to be changed is the program ROM of the CPU, with reference to FIG.

When the control unit 11 is a CPU and the ROM data is in the form of a program, the branching relationship of the program before the data change cannot be ignored. In other words, when going back to the source file of a program, the branching process of a normal program is generally managed by giving a symbol, that is, a text expression, to the branch destination in consideration of the coding efficiency. According to this method, even if the address of the branch destination changes due to a change in the capacity at the time of program change, the association is made by the symbol, and the branch address can be associated with the compiler and the linker, thereby improving the coding efficiency. However, in the case of this embodiment, the code is already compiled and linked, and is in a coded state. If the proposed ROM program is changed, a problem may occur in the above branch processing. For this reason, in this embodiment, when the ROM data is a program, the program form has a tree structure, and the unit for making a change is performed in one unit of the tree structure. Even if the structure is an ordinary form, it is assumed that the usage is such that a change is made in units of subroutine modules, for example, and the subroutine in that case is not a process that branches off from the outside in the middle of the subroutine. Even if it is not a subroutine, there is no problem in the case of giving a jump instruction to the start address of the change processing unit. Therefore, the change unit is changed in units of one section separated by a symbol called at the source file level. .
Of course, the branch instruction from the inside of the changed program to the outside must be associated with the program already stored in the ROM, and a compiler and a linker having a function of associating all the source files before the change with the changed program are required. .

The link data is in the form of a symbol address change like a subroutine address conversion table as shown in FIG. This conversion table may include the deletion start ROM address and the addition start RAM address on the patch data. When the program counter matches the ROM subroutine address of the conversion table as shown in FIG. 8A, the CPU serving as the control unit 11 converts the program counter to the subroutine address on the RAM immediately. By performing the processing, it becomes possible to substantially change a predetermined portion of the program in the ROM 13. That is, instead of the designated subroutine of the ROM, the subroutine of the patch data of the linked RAM indicated by the link data is processed.

Second, FIG. 8B shows a case where the control unit 11 is not a CPU but a ROM to be changed is a data table.
This will be described with reference to FIG.

When considering a form such as a data table used by the control unit 11 for operations such as wired logic,
It is considered that the operation of the data table differs depending on the specifications of the control unit 11. FIG. 8B shows link data in a case where the table data amount is a fixed size and the data amount before and after the change by the ROM content changing unit 14 of this embodiment does not change. In this case, the link destination is indicated by specifying the offset value between the designated address in the ROM and the patch data in the RAM.

As described above, the control program and the confidential data stored in the ROM 13 which cannot be changed originally are converted into patch data in the RAM 12 or the like based on the change data supplied from the outside, and the ROM contents changing unit 14 or With a function corresponding to this, it is made to correspond according to link data. Thereby, when the control unit 11 processes the control program or the confidential data stored in the ROM 13, the control unit 11 processes the change data in the partially linked patch data, thereby substantially controlling the ROM 13. An effect equivalent to that obtained by changing control data such as a program can be obtained.

As a modification of the first embodiment, FIG.
As shown in the flowchart of FIG. 6, a copy protection process can be added to this. This is because when the control device described above is applied to an optical disc device,
This shows that the copy protection processing of the optical disk is further performed. That is, steps S31 to S49 in FIGS. 5 and 6 are equivalent to the steps in FIGS. In step S48 or step S49, after the reset signal to the control unit is released, it is confirmed that a disk is inserted (S50), and when there is a data transfer request from the host computer (S51), the data is copied to this. After performing the protection process, the data is transferred to the host computer 33 or the like (S52).

Further, as a modified example of the first embodiment, the configuration of the ROM content changing unit 14 shown in FIG. 1 is not required to be constituted by a logic circuit, but may be, for example, a control program (data) stored in a ROM 34. May be provided as a change program for the CPU 11 and executed by the CPU 11 included in the control unit 11 to realize an equivalent function of changing data in the ROM. That is, in this case, by executing the ROM content change program as one subroutine provided in the ROM 34, it is possible to substantially change various data stored in the ROM.

Further, although the ROM content changing section 14 in FIG. 1 is configured separately from the control section 11, it is possible to obtain the same operational effects of the present invention even if these two functional blocks are configured as one. Become.

<Second Embodiment> In a second embodiment, the control device shown in the first embodiment is replaced with, for example, a DV.
It is provided for a case where the present invention is applied to a control system or a data processing system of an optical disk device such as D (Digital Versatile Disk). FIG. 10 is a block diagram of an example of an optical disk device to which the control device according to the present invention is applied.

(Basic Configuration of Optical Disk Apparatus) In FIG. 10, an optical disk apparatus according to the present invention performs data recording or data reproduction on an optical disk D. The optical disk device is an optical disk D held by a clamper.
A spindle motor 41 for rotating the spindle motor at a predetermined rotation speed, and a servo amplifier 44 for driving the spindle motor. Further, a pickup 42 for recording a recording data by detecting a reproduction signal corresponding to a pit provided in a concentric or spiral storage area on the optical disc D or irradiating a laser corresponding to the recording data to this storage area. And an RF amplifier 43 for amplifying and outputting the reproduction signal supplied from the pickup 42 at a predetermined amplification factor.

Further, the control device 2 according to the present invention is provided as, for example, one IC device (or control board). The control device 2 receives a reproduction signal from the RF amplifier 43, and outputs a detection signal and a recording signal. , A signal processing block 45 for transmitting and receiving the detection signal and the recording signal, and an error correction block 46 for performing error correction and a buffer 47 provided therewith, and a copy protection process for the detection signal and the recording signal. And a ROM 4 for storing control data such as a control program for programming the entire control operation.
9 and a RAM 50 that mainly provides a work area, and these are connected by a microcomputer bus.
Further, the microcomputer bus is provided with a CPU 11 for controlling data processing and overall operation control.
According to the processing program of No. 9, the recording processing and the reproduction processing for the optical disk D are performed along with the processing of each unit described above.

Further, in the drive system, the spindle motor 41
A servo processing block 52 for servo-controlling the servo amplifier 44, and a buffer 5 for communicating with an external host computer 33 and the like as an interface.
3 and a system interface 24 for communicating with an external system microcomputer 31.

In such a configuration, the control device 2 is provided with a ROM content changing section 51 according to the present invention. Thereby, as described in detail in the first embodiment, RO
Control data such as a control program stored in the M49 and confidential data such as a CSS algorithm for copy protection, and control data such as parameter data for various processes are provided from, for example, the host computer 33 or the system microcomputer 31. RAM according to change data
The patch data is generated in the CPU 50, and is appropriately processed by the CPU 11 instead of the control data of the control program or the algorithm according to the generated link table. By such processing, the ROM 49, which is a non-volatile storage element that cannot be freely changed by nature,
Provided is an optical disk device that can freely change secret data such as a control program and CSS algorithm stored in the storage device by an external device by using an inexpensive configuration and without information leakage. It becomes possible.

The various embodiments described in detail above enable those skilled in the art to implement the present invention. However, various modifications of these embodiments will be readily apparent to those skilled in the art, and the broad principles disclosed may be applied to various embodiments without the inventive ability. is there. As described above, the present invention covers a wide range that does not contradict the disclosed principle and novel features, and it is needless to say that the present invention is not limited to the above-described embodiment.

[0043]

As described above in detail, according to the present invention, by processing according to the change data given based on the format of the ROM content change according to the present invention, the contents in the ROM which cannot be changed originally can be changed. Regarding various data,
It is possible to provide a control device capable of freely changing processing without incurring information leakage by an inexpensive configuration. Further, by applying this to an optical disk device such as a DVD, for example, it is possible to easily change a CSS algorithm or the like stored in the ROM without leaking information.

[Brief description of the drawings]

FIG. 1 is a system block diagram of a control device according to an embodiment of the present invention.

FIG. 2 is an example of a data format of ROM change patch data according to the present invention.

FIG. 3 is an example of a flowchart showing a procedure for changing a ROM according to the present invention.

FIG. 4 is an example of a flowchart showing a procedure for changing a ROM according to the present invention.

FIG. 5 is an example of a flowchart showing another procedure for changing the ROM according to the present invention.

FIG. 6 is an example of a flowchart showing another procedure for changing the ROM according to the present invention.

FIG. 7 is an example of a flowchart showing a procedure of a data destruction method according to the present invention.

FIG. 8 is an example of link data for linking changed data obtained by changing ROM data according to the present invention.

FIG. 9 is a block diagram of an example of a control device that stores a change program for changing a ROM according to the present invention.

FIG. 10 is a block diagram of an example of an optical disk device to which the control device according to the present invention is applied.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... IC apparatus 11 ... Control part 12 ... RAM 13 ... ROM 14 ... ROM content change part 24 ... Microcomputer interface 25 ... Host interface 31 ... System microcomputer 32 ... External ROM 33 ... Host computer

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5D044 BC03 CC06 DE03 DE12 DE17 DE23 DE29 DE39 GK17 HL08 5D090 AA01 BB02 DD03 FF09 HH01

Claims (12)

[Claims] 1. A control device having an IC configuration incorporating control data, comprising: storage means for storing at least first control data in a non-volatile storage area; and a storage means for storing the first control data stored in the storage means. First control means for controlling an operation of a predetermined object based on a new control data provided from outside when a change instruction is received to change a predetermined portion of the first control data in the storage means. Changing means for generating second control data in a predetermined area based on the second control data generated by the changing means instead of controlling the predetermined portion in accordance with the first control data stored in the storage means And a second control means for controlling the operation of the predetermined object based on the data. 2. A control device having an IC configuration containing control data, wherein a first control data and a change program of a predetermined format for substantially changing the first control data are stored in a nonvolatile storage area. A first control unit for controlling an operation of a predetermined object based on the first control data stored by the storage unit; and changing a predetermined portion of the first control data of the storage unit. When a change instruction is received, based on the change program of the predetermined format stored by the storage means,
Changing means for generating second control data in a predetermined area in accordance with new control data given from the outside; instead of controlling the predetermined portion in accordance with first control data stored in the storage means, A control device, comprising: a second control unit that controls an operation of a predetermined target based on the second control data generated by the changing unit. 3. When a change instruction is received to change a predetermined portion of the first control data in the storage unit, the change unit stores the first control data in a predetermined area based on new control data provided from the outside. 2 control data, and the second
3. The method according to claim 1, further comprising comparing the control data with the first control data, and when they are the same, destroying the second control data. The control device described on one side. 4. A control method by a control device having an IC configuration containing control data, the control method comprising: determining a predetermined value based on first control data stored in a nonvolatile storage area of a storage unit built in the control device; A first control step of controlling an operation of a target; and a predetermined area based on new control data provided from outside when a change instruction is received to change a predetermined portion of the first control data in the storage means. And a changing step of generating second control data. The predetermined portion is controlled based on the second control data generated in the changing step instead of being controlled in accordance with the first control data stored in the storage unit. And a second control step of controlling the operation of the predetermined object. 5. A control method by a control device having an IC configuration containing control data, the control method comprising: determining a predetermined value based on first control data stored in a nonvolatile storage area of a storage unit built in the control device; A first control step of controlling an operation of an object; and when receiving a change instruction to change a predetermined portion of the first control data of the storage means, the first control data stored in the storage means is Based on a change program of a predetermined format for substantial change, a second area is stored in a predetermined area in accordance with new control data given from outside.
A changing step of generating control data, and the predetermined portion is controlled based on the second control data generated in the changing step instead of being controlled in accordance with the first control data stored in the storage means. A second control step of controlling the operation of the control method. 6. The change step includes: when a change instruction is received to change a predetermined portion of the first control data in the storage means, a predetermined area is stored in a predetermined area based on new control data externally provided. 2 control data, and the second
6. The method according to claim 4, further comprising the step of comparing the control data with the first control data and, when they are the same, destroying the second control data. The control method described on one side. 7. An optical disk apparatus for processing an optical disk having a concentric or spiral storage area, comprising: rotating means for rotating the optical disk at a predetermined number of rotations; and irradiating a laser beam onto the optical disk rotated by the rotating means. A reproduction signal generation unit for generating a reproduction signal corresponding to the reflected wave; and a reproduction unit for performing a predetermined process on the reproduction signal generated by the reproduction signal generation unit and reproducing a signal stored in the optical disc. A storage unit for storing at least the first control data in a nonvolatile storage area; and a new externally provided new command when a change instruction is received to change a predetermined portion of the first control data in the storage unit. Changing means for generating the second control data in a predetermined area based on the control data, and based on the first control data stored by the storage means, An optical disc apparatus, further comprising: control means for controlling at least operations of the rotating means and the reproducing means for the predetermined portion based on the second control data generated by the changing means. 8. An optical disk apparatus for processing an optical disk having a concentric or spiral storage area, comprising: rotating means for rotating the optical disk at a predetermined rotation speed; and irradiating a laser beam onto the optical disk rotated by the rotating means. A reproduction signal generation unit for generating a reproduction signal corresponding to the reflected wave; and a reproduction unit for performing a predetermined process on the reproduction signal generated by the reproduction signal generation unit and reproducing a signal stored in the optical disc. Storage means for storing, in a nonvolatile storage area, first control data and a change program of a predetermined format for substantially changing the first control data; and a predetermined portion of the first control data of the storage means When a change instruction is received to change, based on the change program of the predetermined format stored by the storage means,
Changing means for generating second control data in a predetermined area in accordance with new control data given from outside; and changing the predetermined part based on the first control data stored in the storage means. An optical disk device comprising: a control unit that controls at least operations of the rotating unit and the reproducing unit based on the second control data generated by the unit. 9. When the change means receives a change instruction to change a predetermined portion of the first control data of the storage means, the change means stores the first control data in a predetermined area based on new control data externally provided. 2 control data, and the second
9. The apparatus according to claim 7, further comprising: means for comparing the control data with the first control data, and when they are the same, destroying the second control data. An optical disk device described on one side. 10. A control method performed in an optical disk apparatus for processing an optical disk having a concentric or spiral storage area, comprising: a rotating unit that rotates the optical disk at a predetermined rotation speed; and an optical disk that rotates the rotating unit. A reproduction signal generating means for irradiating a laser beam thereon to generate a reproduction signal corresponding to the reflected wave; and performing a predetermined process on the reproduction signal generated by the reproduction signal generation means to obtain a signal stored in the optical disk. An optical disk device having a reproducing means for performing a reproducing process of: when receiving a change instruction to change a predetermined portion of the first control data stored in a storage element further provided in the optical disk device, A step of generating second control data in a predetermined area based on the new control data, and a step of storing the first control data stored in the storage element. A control step of controlling at least operations of the rotation unit and the reproduction unit of the optical disk device based on control data, and further based on the second control data generated in the changing step for the predetermined portion. A method for controlling an optical disk device. 11. A control method performed in an optical disk apparatus for processing an optical disk having a concentric or spiral storage area, comprising: a rotating unit for rotating the optical disk at a predetermined rotation speed; and an optical disk for rotating the rotating unit. A reproduction signal generating means for irradiating a laser beam thereon to generate a reproduction signal corresponding to the reflected wave; and performing a predetermined process on the reproduction signal generated by the reproduction signal generation means to obtain a signal stored in the optical disk. An optical disk device having a reproducing unit that performs a reproducing process of (a), when receiving a change instruction to change a predetermined portion of the first control data stored in a storage element further provided in the optical disk device, the storage element Based on a change program of a predetermined format to be stored, a second area is stored in a predetermined area in accordance with new control data given from outside. A change step of generating control data; and a control unit for the optical disk device, based on the first control data stored in the storage element, and further for the predetermined portion based on the second control data generated in the change step. A control step of controlling at least the operations of the rotating means and the reproducing means. 12. The method according to claim 1, wherein when the change instruction is received to change a predetermined portion of the first control data of the storage element, the change to the predetermined area is performed based on new control data provided from outside. (2) generating the second control data, further comparing the second control data with the first control data, and when they are the same, destroying the second control data. A control method for an optical disk device according to claim 10.