JP2000222201A - Instruction executing method of information reproducing device, record medium recording program for allowing the device to execute instruction and disk reproducer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve security by preventing an instruction, which is not intended by a user, from being executed in an optical disk drive by a computer virus intruding a computer system. SOLUTION: This disk reproducer executes manual operation adapted to an instruction, which is issued from the instruction issuing device 23 of a host computer 21 and received by the disk reproducer, and the operation is detected in the disk reproducer. After then, information reflecting the contents of operation is inputted to prepare an instruction based on the input and the instruction is issued from the device 23 of the computer 21 to be received by the disk reproducer. The received instruction is analyzed to be collated with detected information to decide the propriety of the execution of the instruction by the result of this collation. Since the operation contents of the disk reproducer can optionally be selected each time by the user, if the computer virus should know an instruction execution limiting function, the virus can not know as much as the operation contents of the operation part. Consequently, the computer virus is prevented from making the disk reproducer execute the instruction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to, for example, a CD-RO
The present invention relates to a method for executing an instruction of an information reproducing apparatus for reproducing an optical disk such as an M or DVD, a recording medium storing a program for causing the information reproducing apparatus to execute an instruction, and a disk reproducing apparatus.

[0002]

2. Description of the Related Art In recent years, with the generalization of data communication using a public line such as the Internet, obstruction of operation of a computer system by a program unintended by a user, such as a computer virus, has been attracting attention as a major social problem. ing.

Most of peripheral devices such as a CD-ROM drive and a DVD drive that operate according to a command from a host computer cannot know whether or not a virus program is involved in a command from the host computer. Thus, most of the peripheral devices receive and execute instructions issued from the virus program.

In order to prevent an optical disk drive such as a CD-ROM drive or a DVD drive from being operated by the virus program, a method of restricting the use of the optical disk drive for each user or for each title of the disk by using a password has been proposed. ing.

However, even in an optical disk drive having such a function, there is a possibility that setting information such as a password may be deleted or updated by a virus program, and in the worst case, the optical disk drive cannot be used at all. It can go away.

[0006] Under such circumstances, means for reliably protecting the optical disk drive from virus programs have been desired.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to solve such problems.
It is an object of the present invention to provide a disk reproducing apparatus capable of preventing a virus program invading a computer system from executing an instruction unintended by a user.

Another object of the present invention is to provide a method for executing an instruction of an information reproducing apparatus which can prevent an operation disturbance due to a virus program which has entered a computer system.

Still another object of the present invention is to provide a recording medium on which a program for realizing an information reproducing apparatus capable of preventing operation disturbance due to a virus program invading a computer system is recorded.

[0010]

In order to achieve the above object, an instruction execution method of an information reproducing apparatus according to the present invention, a recording medium storing a program for causing an information reproducing apparatus to execute an instruction, and a disk reproducing apparatus are provided. Sends an instruction issued to manage the operation of the reproducing unit for reproducing information in the first place.
Receiving through a first transmission path, and determining whether to execute an instruction received through the first transmission path based on information given through a second transmission path different from the first transmission path. And executing the instruction when the execution of the instruction is permitted.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

1 and 2 show the appearance of an optical disk drive according to an embodiment of the present invention from the front side and the rear side. As shown in these figures, the optical disk drive 10 includes a disk carrier 11 and an eject button 12 pressed when the disk is ejected.
An LED 13 for visually displaying an operation state of the optical disk drive 10; and a jumper pin 1 for setting an operation mode.
4, a cable connector 15 for connection to a computer, and a power connection section 16 for connection to a power cable.
Having. The disk is set on the disk carrier 11 in a state where the disk is free to rotate. This disk carrier 11
Is transported between a position where the user can access the disk and a position where the optical pickup can access the disk by a drive mechanism configured by a combination of various electromechanical components such as a motor, a gear, and a lever. The disk carrier 11 is roughly classified into a tray type having only a storage space for a disk, a drawer type having a mechanism for driving and reproducing a disk, and a disk type. A type where a disc is manually inserted into the drive,
There is a so-called slot-in type in which a disk is directly inserted into a drive.

FIG. 3 shows an optical disk drive 10 according to the present invention.
FIG. 2 is a diagram showing a configuration of a computer system to which is connected. As shown in FIG.
Is a host computer 21 on which an OS (Operating System) 24 is installed, input devices 25 such as a keyboard and a mouse, output devices (not shown) such as a display and a printer, and the optical disk drive 1.
0, a communication device such as a modem (not shown), a magnetic disk drive such as a hard disk drive or a floppy disk drive (not shown), and the like.

The optical disk drive 10 includes a program storage type control unit 26, a communication control unit 27, an eject switch 31 for receiving a tray insertion / removal instruction from a user through operation of the eject button 12 and notifying the control unit 26, And a reading / reproducing unit 33.

The host computer 21 has an instruction issuing device 23 for issuing an instruction to be executed by the control unit 26 of the optical disk drive 10 under the control of the OS 24.
The command issued by the command issuing device 23 is transferred to, for example, the control unit 26 of the optical disc drive 10 via the communication control unit 27 as an interface.

The control section 26 of the optical disk drive 10 comprises a command execution section 28, a command availability determination section 29, and an operation detection / count section 30. When receiving the command issued from the command issuing device 23 of the host computer 21, the control unit 26 determines whether the received command is valid in the command availability determination unit 29. The determination as to whether or not this command is valid is made by the operation detection / counting unit 30 detecting the operation setting information indicating the contents of the operation already set by the user with respect to the optical disk drive 10 and the set operation. This is performed based on the result of the comparison with the operation detection information indicating the actual operation content. When the command determination unit 29 determines that the received command is a valid command as a result of the above determination, it sends the command to the command execution unit 28. The instruction execution unit 28 executes the transmitted instruction.

Here, a method of setting the operation setting information will be described. Control unit 26 of optical disk drive 10
Can monitor a user's direct operation of the eject switch 31 provided on the optical disk drive 10. Therefore, the control unit 26 monitors the number of times of operation of the eject switch 31 and stores the number of times of operation in the operation detection / counter unit 30 including a nonvolatile memory.

The disk reading / reproducing section 33 reads a signal recorded on the disk using an optical pickup according to a command transmitted from the host computer 21, demodulates the data, and reproduces the data. Generally, the disk reading / reproducing unit 33 includes the optical pickup described above, an optical pickup driving unit for driving the optical pickup, a motor unit for rotating the disk, and a system control unit for controlling the entire system. And a demodulation unit that demodulates a signal read from the disk to extract data and an error correction unit that corrects data errors.

Next, the operation of the present embodiment will be described for a plurality of examples.

(1) First Embodiment A first embodiment will be described with reference to FIGS.

FIG. 4 is a diagram showing a command transmission procedure of the optical disk drive according to the first embodiment of the present invention. FIG. 5 is a flowchart showing an operation procedure of the instruction issuing device in the host computer according to the first embodiment of the present invention. FIG. 6 is a diagram showing the content displayed on the output screen in the first embodiment of the present invention. And FIG.
5 is a flowchart illustrating a procedure for restricting execution of a command by a control unit in the optical disc drive according to the first embodiment of the present invention.

As shown in FIG. 4, the user first activates the command issuing device 23 in the host computer 21, for example, the command "Reset dr" shown in FIG.
The character string “v” is input from the input device 25 such as a keyboard to the host computer 21. The OS 24 in the host computer 21 activates the instruction issuing device 23 in response to the activation command.

As shown in FIG. 5, when the instruction issuing device 23 is activated, the first command is transmitted to the OS 24 immediately. (Step 50)

The first command is a command issued immediately after the command issuing device 23 is started, and is, for example, a command for starting the optical disk drive 10.

After issuing the first command, as shown in FIG. 6, the instruction issuing device 23 issues a command to an output device such as a display, for example, "Press the eject button twice or more." Such a message that prompts the user to execute an operation by a predetermined operation means is displayed. (Step 51)

As shown in FIG. 7, the first command transmitted to the OS 24 in step 50 is transferred to the control unit 26 through the communication control unit 27 of the optical disk drive 10.

The control unit 26 determines whether or not the transferred command is a correct first command issued immediately after activating the instruction issuing device 23, and determines that the command is not a correct first command. If so, an end step is performed. When determining that the received command is the first command, the control unit 26 waits for the next input. (Step 70 to Step 72)

When the control unit 26 receives the next command from the host computer 21 during this standby, the control unit 26 sets the first command.
Is determined to be a command not intended by the user, and the end step is executed. (Step 73)

If the control unit 26 detects an operation signal corresponding to the operation of the eject switch 31 during the standby, the operation detection / counter unit stores the number of times the eject switch 31 is pressed. The count value “1” is set to 30. (Step 74)

Then, the controller 26 controls the eject switch 3
An operation waiting time required to detect each operation when the button 1 is continuously pressed is set. (Step 7
5)

If the user operates the eject switch 31 again within the operation waiting time, the control unit 26 determines that the eject switch 31 has been operated again, and increments the count value of the operation detection / counter unit 30 by one. I do. (Steps 76 to 80)

Thereafter, the flow returns to step 75 to set the operation waiting time, and the above processing is repeated.

In step 78, if the operation of the next eject switch 31 is not detected even after the operation waiting time has elapsed, the control unit 26 sets the operation detection / counter unit 3 at the present time.
The count value held at 0 is checked. The control unit 26 determines a process to be executed next based on the checked count value.
Here, whether or not the eject switch 31 has been operated twice or more is set as a processing branch condition. If the control unit 26 determines that the eject switch 31 has been operated two or more times in succession, it notifies the host computer 21 of this fact and sets the waiting time until the next command is transmitted from the host computer 21. Set and wait for the next command. (Step 81, Step 82)

The number of times the user operates the eject switch 31 is finally set to "5".

On the other hand, upon receiving the above notification from the control unit 26 of the optical disk drive 10, the host computer 21 displays on the display a message asking for the number of times the user has pressed the eject switch, as shown in FIG. . Then, the host computer 21 waits for an input for this message. (Step 5
2)

When a numerical value corresponding to the number of times the eject switch is pressed is input by the user as a response to this message, the instruction issuing device 23 in the host computer 21 generates data indicating this numerical value as a second command. (Step 53)

It should be noted that the second command does not have a function of performing any processing on the optical disk drive 10 by itself, but is merely data having a function of transmitting numerical data to the optical disk drive 10.

Eject switch 31 by previous user
In this example, the user has operated the eject switch 31 five times. Therefore, the user inputs a numerical value of “5” from the keyboard or the like in response to the inquiry about the number of times the eject switch is pressed from the host computer 21.

The instruction issuing device 23 transmits the generated second command to the OS 24. (Step 54)

The generated second command is OS2
4 to the optical disk drive 10.

The controller 26 in the optical disk drive 10 in the next command waiting state, as shown in FIG.
24, a second command is received. When receiving the second command within the set transmission waiting time, the control unit 26 activates the command availability determination unit 29. The command availability determination unit 29 collates the count value held in the operation detection / counter unit 30 with a numerical value indicated by the second command. (Step 83 to Step 85)

The command availability determining unit 29 determines whether the count value is
When the first command is determined to match the numerical value indicated by this command, the first command is determined to be a valid command and transmitted to the command execution unit 28. As a result, the instruction execution unit 28
Command is executed. (Step 86)

Finally, the instruction issuing device 23 displays a message indicating that the drive setting has been completed on the screen as shown in FIG. 5, and ends the processing. (Step 55)

(2) Second Embodiment A second embodiment will be described with reference to FIGS.

FIG. 8 is a view showing a command transmission procedure of the optical disk drive according to the second embodiment of the present invention. FIG. 9 is a flowchart showing an operation procedure of the instruction issuing device in the host computer according to the second embodiment of the present invention. FIG. 10 is a diagram showing the content displayed on the output screen according to the second embodiment of the present invention. And FIG.
FIG. 1 is a flowchart showing a procedure for restricting execution of a command by a control unit in an optical disk drive according to a second embodiment of the present invention.

In this embodiment, the user sets the disc on the disc carrier 11 (tray or drawer) and closes the disc, and performs the confirmation operation given by the user after the initialization of the optical disc drive is completed. A determination is made whether to execute a first command to activate the drive 10.

As shown in FIG. 8, when the user changes the setting of the optical disk drive 10, the user issues a command
(Before inputting the character string of the command “Reset drv” from the input device 25 such as a keyboard to the host computer 21), it is necessary to keep the disk carrier 11 open. Usually, the disc carrier 11 can be opened by pressing the eject button 12 of the optical disc drive 10 or issuing an eject command from the host computer 21.

Next, the user issues a command to activate the instruction issuing device 23, for example, the command "Res" shown in FIG.
input device 2 such as a keyboard.
5 and input to the host computer 21.
The character string input by the user is given to the OS 24 of the host computer 21 as a command for activating the instruction issuing device 23. The OS 24 receives the activation command and activates the instruction issuing device 23.

As shown in FIG. 9, when the instruction issuing device 23 is activated, the instruction issuing device 23 immediately transmits the first command to the OS 24. (Step 90)

The first command is a command issued immediately after the command issuing device 23 is started, for example, a command for starting the optical disk drive 10.

As shown in FIG. 10, the command issuing device 23 is provided to an output device such as a display by the user to the optical disc drive 10 such as "Please insert a disc and close the tray." Display a message prompting you to perform an operation. (Step 91)

As shown in FIG. 11, in step 90, the OS
The first command transmitted to 24 is transferred to the control unit 26 through the communication control unit 27 of the optical disk drive 10. (Step 110)

The control unit 26 determines whether or not the transferred command is a correct first command issued immediately after the instruction issuing device 23 is started. (Step 1
11)

If the control unit 26 determines that the transferred command is not the correct first command, an end step is executed.

On the other hand, when determining that the transferred command is the first command, the control unit 26 further determines whether or not the disk carrier 11 is in a closed state.
(Step 112)

When the control unit 26 determines that the disk carrier 11 is in the closed state, an end step is executed. The control unit 26 sets a waiting time when it determines that the disk carrier 11 is in the open state. (Step 113)

This waiting time is the minimum waiting time that must be waited for executing the first command.

After the elapse of the waiting time, the control unit 26
Waits for the input of a signal indicating that the disk carrier 11 has been closed (hereinafter, referred to as a tray close). Then, when the tray close signal is input, the control unit 26 starts the initialization of the optical disc drive 10. (Step 1
14 to step 117)

At this time, the fact that the optical disk drive 10 is being initialized is indicated by blinking of the LED 13. When the initialization of the optical disk drive 10 is completed, the LED 13 changes from blinking to disappearing. The control unit 26 controls the OS of the host computer 21 during the initialization of the optical disk drive 10.
When receiving the next command from 24, this command is processed as an unintended command of the user, and the termination processing is performed.
(Step 118)

Incidentally, the tray close signal can be detected by the following mechanism. FIG. 16 and FIG.
FIG. 7 shows an example of a tray close detection mechanism. The example shown in FIG. 16 is a tray close detection mechanism in the case where there is no motor for taking in and out the disk carrier. This tray close detection mechanism has a detection switch 203 disposed inside the cabinet 201. This detection switch 203
Is composed of, for example, a transmission type optical sensor. When the disc carrier 202 is loaded into the cabinet 201, light from the optical sensor is blocked by the disc carrier 202. As a result, the detection switch 203
Is changed, and the control unit of the optical disk drive recognizes the change of the output level of the detection switch 203, thereby detecting the tray close.

The example shown in FIG. 17 is a tray close detection mechanism when a disk carrier is taken in and out using a motor. This tray close detection mechanism has a detection switch 303 disposed at the back of the cabinet 301 and a detection switch 304 disposed at the entrance of the cabinet 301. These detection switches 303 and 304
Is composed of, for example, a transmission type optical sensor. When the disc carrier 302 is loaded or unloaded into the cabinet 301, the light of the optical sensor is blocked by the disc carrier 302. This allows
The output levels of the detection switches 303 and 304 are inverted. When the output level of the detection switches 303 and 304 satisfies a predetermined condition, the control unit of the optical disk drive recognizes the detection and detects the tray close.

After the initialization of the optical disk drive 10 is completed,
As shown in FIG. 10, the OS 2 of the host computer 21
4 displays a message on the display that prompts the user to immediately press the ENTER key.
After displaying this message, the OS 24 waits for the input of the ENTER key by the user. (Step 92)

The user confirms the completion of the initialization by turning off the LED 13 and hits the ENTER key from the input device 25 such as a keyboard. Then, the instruction issuing device 2
3 issues to the OS 24 of the host computer 21 a second command corresponding to the input of the ENTER key.
(Step 93)

The second command may be any command having a function of transmitting to the OS 24 of the host computer 21 that the ENTER key has been pressed.

On the other hand, the control unit 2 of the optical disk drive 10
6 confirms whether or not a disk is mounted on the disk carrier 11 after the initialization of the optical disk drive 10 is completed. (Step 119)

When it is determined that the disk is not mounted on the disk carrier 11, an end step is executed. If it is determined that a disk is loaded, the control unit 26 sets a predetermined transmission waiting time. (Step 120)

When the control unit 26 receives the next command from the OS 24 of the host computer 21 within this transmission waiting time, the received command is transmitted to the E by the user.
It is determined whether or not this is a second command indicating that the NTER key has been pressed. (Step 121 to Step 1
23)

The control unit 26 determines that the received command is
If it is determined that the command is not a command of the received, the received command is canceled as a command not intended by the user,
Execute end processing. When determining that the received command is the second command, the control unit 26 causes the instruction execution unit 28 to execute the first command. (Step 124)

After the execution of the first command is completed,
The instruction issuing device 23 displays a message indicating that the setting of the optical disk drive 10 has been completed on the display screen as shown in FIG. (Step 94)

(3) Third Embodiment Next, a third embodiment will be described with reference to FIGS.

FIG. 12 is a flowchart showing the operation procedure of the instruction issuing device in the host computer according to the third embodiment of the present invention. FIG. 13 shows a third embodiment of the present invention.
It is a figure showing the content displayed on the output screen in the example of an example. FIG. 14 is a flowchart showing a procedure for restricting the execution of a command by the control unit in the optical disk drive according to the third embodiment of the present invention. FIG. 15 is a diagram showing an example of the disc type information of the optical disc drive according to the third embodiment of the present invention.

As shown in FIG. 8, when the user changes the setting of the optical disk drive 10, the command issuing device 23
(Before inputting the character string of the command “Reset drv” from the input device 25 such as a keyboard to the host computer 21), it is necessary to keep the disk carrier 11 open. Usually, the disc carrier 11 can be opened by pressing the eject button 12 of the optical disc drive 10 or issuing an eject command from the host computer 21.

Next, the user issues a command to activate the instruction issuing device 23, for example, the command "Res" shown in FIG.
input device 2 such as a keyboard.
5 and input to the host computer 21.
The character string input by the user is given to the OS 24 of the host computer 21 as a command for activating the instruction issuing device 23. The OS 24 receives the activation command and activates the instruction issuing device 23.

As shown in FIG. 12, when the instruction issuing device 23 is activated, the instruction issuing device 23 immediately transmits the first command to the OS 24. (Step 130)

The first command is a command issued immediately after the command issuing device 23 is started, and is, for example, a command for starting the optical disk drive 10.

As shown in FIG. 13, the command issuing device 23 is operated by the user on the optical disk drive 10 such as "insert a disk and close the tray" on an output device such as a display. Is displayed. (Step 131)

As shown in FIG. 14, at step 130, O
The first command transmitted to S24 is transferred to the control unit 26 through the communication control unit 27 of the optical disk drive 10. (Step 140)

The control unit 26 determines whether the transferred command is a correct first command issued immediately after the instruction issuing device 23 is started. (Step 1
41)

If the control unit 26 determines that the transferred command is not the correct first command, an end step is executed.

On the other hand, when determining that the transferred command is the first command, the control unit 26 further determines whether the disk carrier 11 is in the closed state.
(Step 142)

When the control unit 26 determines that the disk carrier 11 is in the closed state, an end step is executed. The control unit 26 sets a waiting time when it determines that the disk carrier 11 is in the open state. (Step 143)

This waiting time is the minimum waiting time that must be waited for executing the first command.

After the waiting time has elapsed, the control unit 26
Waits for the input of a signal indicating that the disk carrier 11 has been closed (hereinafter, referred to as a tray close). Then, when the tray close signal is input, the control unit 26 starts the initialization of the optical disc drive 10. (Step 1
44 to step 146)

At this time, the fact that the optical disk drive 10 is being initialized is indicated by blinking of the LED 13. When the initialization of the optical disk drive 10 is completed, the LED 13 changes from blinking to disappearing. The control unit 26 controls the OS of the host computer 21 during the initialization of the optical disk drive 10.
When receiving the next command from 24, this command is processed as an unintended command of the user, and the termination processing is performed.
Further, when receiving the next command from the OS 24 of the host computer 21 during the initialization of the optical disk drive 10, the control unit 26 performs an end process as a command not intended by the user. After the initialization of the optical disk drive 10 is completed, the control unit 26
Check whether a disk is loaded in the disk 1 or not. (Step 147, Step 148)

When it is determined that the disk is not mounted on the disk carrier 11, an end step is executed. When it is determined that the disc is mounted on the disc carrier 11, the control unit 26 extracts disc type information from the disc. (Step 149)

As shown in FIG. 15, the disk 160 has a lead-in area 16 in which management information of the entire disk is recorded.
One. This lead-in area 161
0 on the innermost circumference 160a. The lead-in area 161 has a Q mode area 162 in which track information of the disk is described. The Q mode area 162 further has a control area bit 163, a track signal 164, a start address 165, and the like. The disc type information is included in the control area bit 163.

On the other hand, when the initialization processing of the optical disk drive 10 is completed, as shown in FIG. 13, the user actually mounts the optical disk drive 11 from the list of disk types displayed on the display screen. The disc type number is selected from the input device 25 such as a keyboard. The instruction issuing device 23 includes the optical disk drive 1
After the initialization of 0 is completed, the system waits for the input of the disc type number from the user. (Step 132)

When a disc type number is input by the user, a second number corresponding to the numerical value of the input number is received.
Generate a command for This second command is the OS 24
Is transmitted to the optical disk drive 10 via the. (Step 133)

The control unit 26 of the optical disk drive 10
After extracting the disc type information from the disc, a predetermined transmission waiting time is set. (Step 150)

When the control unit 26 receives the next command from the OS 24 of the host computer 21 within this transmission waiting time, it determines whether the received command is the second command indicating the disk type selected by the user. Judge whether or not. (Step 151 to Step 15
3)

The control unit 26 determines that the received command is
If it is determined that the command is not a command of the received, the received command is canceled as a command not intended by the user,
Execute end processing. When the control unit 26 determines that the received command is the second command, the command acceptability determining unit 29 determines whether the received command is the second command and the disc type indicated by the second command. To the information in (Step 154)

As a result of this collation, when it is determined that the disc types match, the command availability determination unit 29 sets the first
Is determined as a valid command, and the instruction execution unit 28
Executes the first command. (Step 155)

When the execution is completed, the instruction issuing device 23
Displays a message on the screen indicating that the setting of the optical disk drive has been completed, as shown in FIG. 13, and terminates the processing. (Step 134)

As described above, according to the present embodiment, the operation of the eject button and the tray closing operation, which are information that can be given only by the authorized user, to the validity of the command received from the host computer by the optical disk drive. Operation, ENTER key operation on the keyboard,
By making a determination using information generated by a disc type selection operation or the like, it is possible to prevent the optical disc drive from executing commands unintended by the user issued by a computer virus or the like.

The present invention is not limited to the contents described above, and various applications and modifications are possible within the scope of the same technical idea.

For example, although the invention of the optical disk drive has been described above, the function according to the present invention is provided to the optical disk drive by a method of installing a program stored in a program storage medium such as a floppy disk or a CD-ROM into the system. It is possible to be.

It is also possible to take in a program from outside through a communication line.

Further, the functions according to the present invention include a flash ROM, an EEPROM (electrically
erasable) / programmable rea
The program may be provided to the optical disk drive by a program stored in a semiconductor memory such as a “only memory”.

By the way, in the first embodiment, the count value at which the eject switch 31 is continuously pressed within the set time and the “second
The first command is executed when the values indicated by “command” are the same. However, regardless of this, a command indicating the end of the operation of the eject switch 31 may be used as the second command. In this method, the eject switch is checked for a count value that has been continuously pressed within a set time before the command is transmitted, and when the count value matches a predetermined value, the first command is issued. Is executed.

In setting the waiting time, when the disc is unloaded, the time from when the eject switch is pressed to when the rotation of the disc is stopped and the tray on which the disc is mounted is completely discharged is defined as the waiting time before processing. It can also be.

Here, the waiting time before processing from the transmission time of the first command to the end of the operation is a time that can be freely selected by the user each time the operation is performed, and the end time of the entire operation is determined by this time. Therefore, it is difficult for a computer virus to imitate the transmission of the second command to the optical disk drive. Similarly, the processing wait time is a time that can be freely selected by the user. Therefore, even if a computer virus performs an operation within the pre-processing wait time, the transmission of the second command is further imitated within the processing wait time. It is extremely difficult to do.

The ejection operated by the ejection switch used in the command execution restriction method of the disk reproducing apparatus of the present invention does not extend to the normal operation described later.

FIGS. 16 and 17 are conceptual diagrams when the eject switch in the present invention is pressed.

As shown in the figure, the close switch recognizes whether the tray or the drawer is closed.

Normal ejection means that a part of or the whole of a disk or a container surrounding the disk is taken out of the disk reproducing apparatus.

[0106]

As described above, according to the present invention, the condition for executing an instruction issued from an instruction issuing device such as a host device is determined by the condition of an instruction from another path which cannot be known by the instruction issuing device. By adding the transmission, it is possible to prevent execution of an instruction given from a computer virus that has invaded the instruction issuing device, and it is possible to provide a disk reproducing device excellent in security.

[Brief description of the drawings]

FIG. 1 is a perspective view (front view) showing the appearance of an optical disk drive device according to an embodiment of the present invention.

FIG. 2 is a perspective view (rear view) showing the appearance of the optical disk drive device according to the embodiment of the present invention.

FIG. 3 is an exemplary view showing the configuration of a computer system having an optical disk drive according to an embodiment of the present invention as a peripheral device.

FIG. 4 is a diagram showing a command transmission procedure of the optical disc drive according to the first embodiment of the present invention.

FIG. 5 is a flowchart showing an operation procedure of the instruction issuing device in the host computer according to the first embodiment of the present invention.

FIG. 6 is a diagram showing contents displayed on an output screen according to the first embodiment of the present invention.

FIG. 7 is a flowchart showing a procedure for restricting execution of a command by a control unit in the optical disc drive according to the first embodiment of the present invention.

FIG. 8 is a diagram showing a command transmission procedure of an optical disk drive according to a second embodiment of the present invention.

FIG. 9 is a flowchart showing an operation procedure of an instruction issuing device in a host computer according to a second embodiment of the present invention.

FIG. 10 is a diagram showing contents displayed on an output screen according to a second embodiment of the present invention.

FIG. 11 is a flowchart illustrating a procedure for restricting execution of a command by a control unit in an optical disc drive according to a second embodiment of the present invention.

FIG. 12 is a flowchart illustrating an operation procedure of an instruction issuing device in a host computer according to a third embodiment of the present invention.

FIG. 13 is a diagram showing contents displayed on an output screen according to a third embodiment of the present invention.

FIG. 14 is a flowchart showing a procedure for restricting execution of a command by a control unit in an optical disc drive according to a third embodiment of the present invention.

FIG. 15 is a diagram showing an example of disk type information of an optical disk drive according to a third embodiment of the present invention.

FIG. 16 is a conceptual diagram of a thin (drawer) type drive device of an optical disk drive according to an embodiment of the present invention.

FIG. 17 is a conceptual diagram of an optical disk drive thick (tray) type drive device according to an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Optical disk drive 11 ... Disk conveyance body 12 ... Eject button 13 ... LED 14 ... Operation mode setting jumper pin 15 ... Connection cable connector 16 ... Power supply connection part 20 ...・ Computer system 21 ・ ・ ・ Host computer 23 ・ ・ ・ Command issuing device 24 ・ ・ ・ Operating system 25 ・ ・ ・ Input device 26 ・ ・ ・ Control unit 27 ・ ・ ・ Communication control unit 28 ・ ・ ・ Command execution unit 29 ・..Command permission / prohibition unit 30 ... operation detection / counter unit 31 ... ejection switch 32 ... connection cable 33 ... disk read / playback unit

Continued on front page F-term (reference) 5B065 BA03 PA02 PA04 PA11 5B076 FD08 5D044 BC02 CC04 DE42 HH13 HH15 HL01

Claims (3)

[Claims] Receiving, via a first transmission path, an instruction issued to manage an operation of a reproducing unit for reproducing information; and a second transmission path different from the first transmission path. Deciding whether to execute the command received through the first transmission path based on the given information; and executing the command when execution of the command is permitted. A command execution method for an information reproducing apparatus characterized by the above-mentioned. 2. An information reproducing apparatus according to claim 1, wherein said instruction issuing apparatus issues an instruction for managing an operation of a reproducing unit of said information reproducing apparatus. A recording medium storing a program for operating the information reproducing apparatus so as to make a decision based on an artificial operation transmitted from a route. 3. A disc reproducing apparatus which is connected to a host computer and has an interface for transmitting / receiving a command and a reproduction signal to / from the host computer, and for reproducing a disk on which information is recorded as a digital signal. A processor unit for controlling the operation of the playback device; a first signal transmission path connected to the interface and transmitting an instruction signal according to an instruction from the host computer to the processor unit; An operation unit that generates an operation signal corresponding to the operation of the provided user, and is connected to the operation unit, and transmits an operation signal generated according to the operation of the operation unit to the processor unit. And a second signal transmission path, The operation means determines whether or not execution of an instruction based on an instruction signal transmitted from the host computer to the processor unit via the first signal transmission path is possible. A disc playback device that makes a determination based on an operation signal transmitted to the processor unit via the processor unit.