KR100260955B1 - Security device for audio equipment - Google Patents

Abstract

The present invention is directed to theft of an audio device for reproducing a signal recorded on a recording medium, wherein the audio device in an inoperable state is operable when the data recorded on the recording medium in the reproduction state matches the identification data stored in the memory. A security device for preventing a security device comprising: first mode switching means for switching a mode of the device to an identification medium setting mode in which identification data can be stored in a memory; And the data recorded on the recording medium when the recording medium is in the reproduction state when the identification medium setting mode is switched to the identification medium setting mode by the first mode switching means and no identification data is stored in the memory. And identification data storage means for storing the identification data as the identification data.

Description

Security device for audio devices {SECURITY DEVICE FOR AUDIO EQUIPMENT}

The present invention relates to a security method for preventing theft of an audio device, in particular an audio device for a vehicle.

Since audio devices, especially vehicle audio devices for export, are susceptible to theft damage, the anti-theft method using passwords has been adopted as a countermeasure against theft of devices. In this anti-theft method, a specific password memorized by the purchaser of the audio device is input by the operator through the numeric keys of the device, and the device can be operated and used if the password is correct on the device side. In other words, in the security method of a conventional vehicle audio device, a user password is input manually by inputting a multi-digit user password using various numeric keys on the front panel of the device, and the device operates when the password is correct on the device side.

In addition, if an audio device is stolen from a car, the device is first removed from the car and mounted in another car. That is, the device is disconnected from the battery once and then connected to the battery again. A change in the battery connection state, that is, a change in the battery connection state is detected from the change in the power supply, and when the state is detected, the above security method is executed, and the device is not operated unless the correct password is input. Therefore, even if the device is taken from the car, the device cannot be operated unless the user of the device that knows the password. In addition, by displaying a device having such a function on a car and a device, that is, by attaching a mark such as `` His vanity '' to a car and a device, it attempts to reduce the willingness of the person who tries to steal and to prevent theft.

Nevertheless, not all audio devices have a large number of numeric keys. In this case, the number of passwords decreases, so the security performance is deteriorated. In addition, there is a method of inputting a password using a key other than the numeric keys, but since the operation is complicated and the password is not a number, it is difficult for the user to remember.

Due to this, a security device for an audio device using a recording medium itself such as a compact disc has been proposed. This is described in Japanese Patent Application No. Hei 2-333681 (Japanese Patent Application Laid-Open No. 4-205965), which is a security method of an audio device for reproducing sound recorded on a recording medium. Compared with the information recorded in the memory, it is possible to operate the audio device according to the comparison result. In addition, since there are many kinds of recording media, the security capability is very high.

However, when a recordable medium is used as the recording medium, the information recorded on the recording medium may be corrected, which may be different from the information stored in the memory of the audio device, thereby preventing security release. For example, an audio device using a magneto-optical disk called a mini-disc, which has recently been popularized, has a disc that can be corrected, and this problem occurs in a reproducing apparatus or a security device for a recording / reproducing apparatus using the mini-disc.

Accordingly, an object of the present invention is to enable a user to easily release the security operation without causing a deterioration of the security performance in the audio device, and furthermore, to provide a security device that prevents the inability to release security by carelessness. For the purpose of

Disclosure of the Invention

The present invention provides a security device for preventing theft of an audio device for reproducing a signal recorded on a recording medium, wherein the audio device is inoperable when the data recorded on the recording medium in reproduction state matches with the identification data stored in the memory. First mode converting means for making the operating state of the apparatus and setting the mode of the apparatus to the identification medium setting mode for causing the identification data to be stored in the memory; And

The data recorded on the recording medium is stored in the memory as identification data when the recording medium is switched to the identification medium setting mode by the first mode converting means and the identification data is not stored in the memory. And an identification data recording means. The present invention also provides a security device for preventing theft of an audio device for reproducing a signal recorded on a recording medium. The audio device is inoperable when the data recorded on the recording medium in the playback state matches the identification data stored in the memory. A security device for an audio device that can operate a device, the security device comprising: a ROM in which master data of a predetermined master recording medium is recorded; and an operation when the data recorded on the recording medium which has become a playback state matches the master data stored in the ROM. And a disabling means for disabling said audio device in a disabled state.

In addition, the present invention provides a security device for preventing theft of an audio device for reproducing a signal recorded on a recording medium, which is inoperable when the data recorded on the recording medium in reproduction state coincides with the identification data stored in the memory. An apparatus for securing an audio device, comprising: a ROM on which master data of a predetermined master recording medium is recorded; When an inconsistency between the data stored in the storage medium made in the reproduction state and the identification data has been continuously performed for a predetermined number of times or more in a case where the audio device is in an inoperable state, data corresponding to the identification data is recorded. Inoperation release control means which makes it impossible to release the inoperable state, and makes the audio device inoperable state operable only when the data recorded on the reproducing state matches the master data stored in the ROM. Security device of an audio device, characterized in that having a.

In addition, the present invention is a security device that prevents theft of an audio device that reproduces a signal recorded on a recording medium. The audio device is inoperable when the data recorded on the recording medium which has been reproduced matches with the identification data stored in the memory. In the security device of the audio device to operate the device,

Second mode switching means for making the identification medium release mode capable of erasing identification data stored in the memory, and matching with identification data stored in the memory under the state of switching to the identification medium release mode by the second mode switching means. And first identification data erasing means for erasing the identification data stored in the memory when the recording medium on which the data is stored is placed in the playback state.

In addition, the present invention relates to the ROM in a state in which the second medium switching means for switching to the identification medium release mode capable of erasing the identification data stored in the memory and the second medium switching means are switched to the identification medium release mode. And second identification data erasing means for erasing the identification data recorded in the memory when the master recording medium having recorded therein data corresponding to the stored master data is placed in the reproduction state.

In addition, the present invention provides the identification data when the discrepancy between the data stored on the recording medium in the reproduction state and the identification data is detected for a predetermined number of times or more by the second mode switching means. It is regarded that it is impossible to erase the identification data stored in the memory by the identification medium on which data corresponding to the data is recorded, and the data recorded on the recording medium in the reproducing state is stored in the memory only when it matches the master data stored in the ROM. And identification data erasing control means for enabling erasure of the stored identification data.

In addition, the present invention is a security device that prevents theft of an audio device that reproduces a signal stored in a recording medium. The present invention is inoperable when the data recorded on the recording medium and the identification data stored in the memory match. A security device of an audio device for enabling the audio device to operate,

Mode setting means for setting the identification data into a storage mode in which the identification data can be stored in the memory by a predetermined operation;

Identification medium setting means for storing, in said memory mode, identification data specifying said recording medium stored in a storage medium in a playback state as said identification data in said memory;

Discriminating means for discriminating whether or not the specific data of the storage medium in the reproduction state is correctable (changeable), and discriminating means for discriminating whether or not the specific data of the recording medium in the reproduction state is correctable by the discriminating means;

An audio device characterized by having a prohibition means for prohibiting the identification data from being stored in the memory by the identification medium setting means when the specific data of the recording medium put into the reproduction state by using the discriminating means is correctable. Security device.

The present invention is also characterized in that display means for indicating that the recording medium is unsuitable for the setting of the identification data when the specific data of the recording medium in the reproduction state can be corrected.

In addition, the present invention is characterized in that a discharge means for discharging the recording medium from the audio device is provided when the specific data of the recording medium in the reproduction state can be corrected.

When the identification data can be stored in the memory using the first mode converting means, an arbitrary recording medium is brought into the playback state in that state, and the information recorded on the recording medium is stored in the memory. Is set to a recording medium capable of releasing an inoperable state of the audio device. In addition, when identification data has already been recorded in the memory, new identification data is not recorded thereon, thereby preventing the identification data from being incorrectly corrected.

In addition, by inserting a recording medium in which data coinciding with master data stored in an erasable manner is inserted into the ROM, an audio device in an inoperable state can be operated. Therefore, the storage medium storing the identification data stored in the memory is lost. In such cases, the inoperable state can be released.

The recording medium is put into a playback state to release an inoperable state of the audio device. However, if the recording medium having data that does not match the identification data stored in the memory is continuously played for a predetermined number of times or more, the inoperable state of the audio device cannot be released unless the master recording medium is used, thereby improving the anti-theft capability.

Further, by using the second mode switching means, the identification data recorded in the memory can be erased, and the recording medium in which the identification data is stored in the memory is reproduced, and the identification data stored in the memory is erased. do. Therefore, the identification data recorded in the memory can be erased and corrected, thereby improving the anti-theft capability and ease of operation.

In addition, by inserting a recording medium on which data coinciding with the master data stored in the ROM can be erased and corrected, the identification data recorded in the memory can be erased. Further, even when the recording medium whose identification data is recorded in the memory is lost, the identification data recorded in the memory can be erased and corrected. In addition, the recording medium is put into a reproduction state in order to erase the identification data stored in the memory. However, if the recording medium having data that does not match the identification data stored in the memory is continuously reproduced for a predetermined number or more times, the identification data stored in the memory can be erased only by using the master recording medium, thereby improving the anti-theft capability.

In addition, when a predetermined operation state is reached, the mode setting means sets the mode in which the identification data can be stored in the memory. When the recording medium is brought into the playback state in this state, the identification medium setting means stores the specific data recorded on the recording medium as identification data in the memory. However, if it is determined by the discriminating means that the specific data recorded on the recording medium is correctable, the storage prohibiting means prohibits the identification medium setting means from storing the specific data of the recording medium as the identification data in the memory. The memory is prevented from being corrected.

If it is determined that the recording medium is capable of correcting the specific data, the display means (display means) indicates that the recording medium is not suitable for setting the identification data.

In addition, if it is determined that the recording medium can correct (change) specific data, the ejecting means ejects the recording medium in the audio device.

1 is a block diagram of an audio device showing an embodiment related to the present invention.

2 is a front configuration diagram of an in-vehicle audio device according to an embodiment of the present invention.

3 is a flowchart showing a main routine.

4 is a flowchart showing ID disk setting mode processing.

5 is a flowchart showing processing of an ID disk erasing mode.

6 is a flowchart showing inoperational release mode processing.

7 is a flowchart showing master input mode processing.

8 is an explanatory diagram of a recording form of a compact disc;

9 is a block diagram of an audio device showing another embodiment according to the present invention.

10 is a front configuration diagram of a vehicle audio device according to another embodiment of the present invention.

11 is a flowchart showing a main routine.

12 is a flowchart showing ID disco setting mode processing.

13 is a flowchart showing ID disc erase mode processing.

14 is a flow chart showing inoperational release mode processing.

15 is a flowchart showing master input mode processing.

Fig. 16 is an explanatory diagram showing a recording form of a mini disc.

Hereinafter, an embodiment of the present invention using the drawings will be described. In the embodiment of the present invention, a digital audio disc player called a compact disc player will be described as an example. However, the present invention can be applied to digital audio disc players such as mini disc players other than compact disc players, digital audio tape players, and the like. .

Prior to describing the embodiment of the present invention in detail, the signal recording form of the compact disc will be briefly described. 8 is an explanatory diagram showing a recording form of a compact disc.

As shown, the compact disc is composed of a lead-in area 31, a data area 32 and a lead-out area 33. As shown in FIG. In the lead-in area 31, data specific to the disc (number of songs, starting position of a song, playing time, etc.) called TOC (TABLE OF CONTENTS) data is recorded.

In the security method of the present embodiment, the user selects a specific compact disc and writes the contents (TOC data) recorded in the lead-in area 31 to a memory of an audio device, for example, a correctable ROM (EEPROM), and the like. It is possible to compare the TOC data of the compact disc and the mounted compact disc and to operate the audio device at the same time. When writing to the ROM, the ROM writer is built in the audio device in advance, and the contents recorded in the lead-in area 31 of the compact disc mounted through the specific operation are written in the ROM.

1 is a block diagram of an audio device (compact disc player with a wireless receiver) showing an embodiment of the present invention. The compact disc player with a wireless receiver reads information of the compact disc 1 and reproduces a voice signal. A player (2), a radio receiver (8) for receiving radio broadcasts, an amplifier (5) for amplifying audio signals from the player (2) and the radio receiver (8) and outputting them to the speaker (7); A microprocessor 4 for controlling the player 2, the radio receiver 8, the amplifier 5, and controlling security-related operations, and an EEPROM (electrically erasing and reprogramming) for storing information for releasing security operations. Possible read-only memory).

The microprocessor 4 is directly connected to the battery via the ignition switch IGSW and monitors the connection state with the battery. The microprocessor 4 also has a built-in ROM (read only memory) in which the TOC contents of the program and the master disk are stored.

The signal lines between the CD player 9 and the speaker 7 configured as described above are provided with respective connectors 51 and 52, and the CD player 9 is mounted on the console panel and the power is supplied by the connectors 51 and 52 at the same time. As the lines and signal lines are electrically connected and detached from the console panel, the lines and signal lines fall out of the positions of the connectors 51 and 52.

The EEPROM 3 is a memory that can protect and maintain the memory contents electrically without supplying power. When the ignition switch IGSW is brought into a conductive state by the driver's operation, the electric power from the battery B is supplied to the ignition circuit 53 so as to ignite the spark ignition internal combustion engine 54 from the ignition circuit 53. Pulse voltage is applied.

In addition, the operation of the audio device of the present invention and the embodiment will be described. 2 is a block diagram showing the configuration of the front side of a vehicle audio device (a CD player with a built-in radio receiver).

The front panel of the CD player 9 with a built-in wireless receiver is provided with a disc insertion hole 11 for inserting a compact disc, a display unit 12 for displaying various displays, and a plurality of switches for performing various operations. have.

In the display unit 12, the display according to the operation state of the player 2 and the wireless receiver 8 is performed. For example, a performance number, a playing time, a volume, a reception frequency, a reception band (AM, FM), etc. of a compact disc are displayed. Is displayed.

Reference numerals 13 and 14 denote switches for adjusting the volume, sound quality, balance, and fader (front and rear balance), and the adjustment items (volume, sound quality balance, fader) selected from the mode switch 15 are set to the adjustment switch 13. , 14) to increase or decrease. In addition, each time the mode switch 15 is operated, the adjustment items are corrected in turn, and if the adjustment switch 13 or 14 or the operation time of the mode switch 15 continues for a certain period of time, the control unit automatically enters the volume adjustment mode (adjustment target volume). It is configured to return.

Reference numerals 16 and 17 denote source selection switches in which the player 2 is selected as the sound source when the switch 16 is operated, and the wireless receiver 8 is selected as the sound source when the switch 15 is operated.

Reference numeral 18 is used to select a music program during the operation of the player 2 among the serial number switches and to select a designated radio station during the operation of the radio receiver 8. For example, if the third switch is operated during the operation of the player 2, and the playback switch 23 to be described later is operated, the third CD is played. When switch 2 is momentarily activated (e.g., less than 2 seconds) during operation of the radio receiver 8, the reception frequency stored in the corresponding memory is read from the memory and the reception frequency of the radio receiver 8 is changed. After reading and correcting to the radio reception frequency, and operating switch 2 for a long time (for example, 2 seconds or more), the reception frequency currently being received is recorded in a memory corresponding to the number switch 2.

Reference numeral 19 is a switch for switching the reception band (AM. FM) of the radio receiver 8 in the band switching switch. Reference numerals 20 and 21 indicate that the reception frequency decreases when the down switch 20 is operated by the lifting switch of the reception frequency, and the reception frequency increases when the up switch 21 is operated.

Reference numeral 22 denotes a discharge switch, and as a result of this operation, the compact disc in the player 2 is discharged from the disc insertion hole 11.

Reference numeral 23 denotes a play switch of the player 2, the operation is stopped when operating during compact disc performance, and the operation of the compact disc is resumed when operating during the stop of performance.

Next, security-related operations of an audio device according to an embodiment of the present invention will be described.

[Security operation]

The wireless receiver operates when the CD player 9 with built-in radio is detached from the vehicle and set in the vehicle once again in the security mode. Specifically, the microprocessor 4 detects the change of the battery connection state, that is, the connection state of the battery from the variation of the power supply, and executes a security operation when the disconnected state of the CD player 9 is detected. When this security operation is executed, the CD player 9 with the wireless receiver becomes inoperable.

That is, the microprocessor 4 is not subjected to various switch operations and the like except for a special operation set in advance.

In order to cancel this inoperable state, a predetermined disc set by a user is inserted, or a CD player 9 with a wireless receiver is brought to a manufacturer or a retailer, and the inoperable state is released by inserting a master disc held by the retailer or the like. The operation of the CD player 9 with the wireless receiver is then possible.

Specifically, the TOC data of the ID (identification) disk is stored in the EEPROM (3) of the CD player 9 with the wireless receiver once detached from the battery and the security mode is set (the CD player 9 with the wireless receiver is set). When the power is turned on, the CD player 9 with the wireless receiver is in an inoperable state, and an indication (“SEC” is lit for two seconds) is displayed on the display unit 12 as inoperable by the security function. Then, an indication to prompt the disc insertion (lights up until the "DISC" disc is inserted) appears, and when the ID disc is inserted into the disc insertion hole 11, the security function is released, that is, the CD player with the wireless receiver 9 The disk is ejected once after the display ("OK" 2 sec lighting) is performed and the normal operation (operation of the player 2 or the radio receiver 8) is performed.

When a compact disc other than the ID disc (or a disc for which TOC data cannot be read) is inserted into the insertion hole 11, the display unit 12 cannot read and displays the disc insertion count ("ERR n"). 2 sec.) Is displayed, and the disc is ejected once, and then a disc requesting to insert the disc is made again (lit up to the disc insertion).

If the insertion of the compact disc other than the ID disc into the disc insertion hole 11 is performed five times in succession, a display requesting the display unit 12 to check whether or not the inserted compact disc is the ID disc. (Lights up until 1 hour has elapsed after reconnecting the "COOL" battery), and the disc is ejected once (after 1 hour has elapsed after reconnecting the battery). Is done. In this case, when various switches are operated in a specific operation (simultaneous operation of the source selection switch 16 and the 1st and 2nd number switches 18), an error state is displayed to indicate that the switch should be taken to the store (when the "HELP" power is turned off. Lights up) to stop the ID disc erase mode. This is a long time to wait for the sixth ID disk insert operation, so if the user gives up the five attempts to release the operation by themselves without waiting for a long time and takes the device to the retailer, the retailer is inoperable. It is considered to be able to release immediately. If the insertion is made 10 times in succession in the disc insertion hole 11 of the compact disc instead of the ID disc, an error condition is displayed and an indication to go to the store ("HELP" lights up until the power is turned off) is displayed. The disk erase mode is stopped (ended).

In addition, in the case where an indication that the store must be brought to the store as an error state is made, even if the power is cut off, the CD player 9 with the wireless receiver becomes inoperable and cannot operate unless the store performs the release operation by the master disc. The state is not released. In other words, the insertion of discs other than ID discs is handled by a user's mistake up to the ninth time, and the tenth time in succession is handled by a stolen person to improve theft prevention capability.

[Security Mode Settings and ID Disk Settings]

The security mode is set by the user storing TOC data of the ID (identification) disc in the EEPROM 3 of the CD player 9 with the wireless receiver (ID disc setting operation). That is, the microprocessor 4 judges whether or not the data is stored in the EEPROM (whether or not the initial state (usually 0 is stored)) in the secure mode.

The ID disc setting operation is performed when the power supply of the CD player 9 with the wireless receiver is turned on to enter the ID disc setting mode, and the ID disc setting operation is performed according to the display of the display unit 12 of the CD player 9 with the wireless receiver. The compact disc to be inserted is inserted into the disc insertion hole 11.

Specifically, when the power is turned on, first, the source selection switch 16 and the first switch 18 are operated simultaneously to enter the security setting mode, and the display 12 indicates that the security installation mode has been entered ("SEC 2 focus), and the compact disc is ejected when the compact disc is inserted. After that, a display requesting to insert the disk ("DISC" lights up until the disk is inserted) is performed. When the compact disk to be used as the ID disk is inserted into the disk insertion hole 11, TOC data of the compact disk is read. The EEPROM 3 is subscribed as identification data. After the display indicating that the setting of the ID disk has been completed ("SEC" lights up for 2 seconds) is performed, the disk is ejected once, and the ID disk setting mode is terminated, and the normal operation (player 2 or wireless receiver 8) is performed. Operation).

In addition, when a compact disc that is not suitable as an ID disc, for example, a compact disc that is scratched and cannot read TOC data, is set as an ID disc, that is, TOC data of a compact disc inserted in the disc insertion hole 11 In the case where it is impossible to read, first, the display unit 12 displays an unreadable indication ("ERR" lights up for 2 seconds), and then ejects the disc once, and then an indication ("DISC") is requested to insert the disc again. Lights up until If the TOC data cannot be read two times in succession, the display unit 12 displays a request for disk replacement ("CHANGE" lights up for 2 seconds) and then ejects the disk once. The display ("DISC" lights up until the disc is inserted) is performed.

[Release Security Mode]

In addition, the security mode is released by erasing (referred to as an initial state) identification data stored in the EEPROM 3. That is, the microprocessor 4 erases the identification data stored in the EEPROM 3 when a specific operation is performed. The specific operation is to first set the mode to the ID disc erasing mode by performing a special operation when the CD player 9 with a wireless receiver is turned on, and then display the display portion 12 of the CD player 9 with a wireless receiver. By inserting into the disc insertion hole 11 the master disc held by an ID disc or a sales shop etc. which were set previously at this time.

More specifically, when the power is turned on, the display enters the security release mode by operating the source selection switch 16 and the second switch 18 simultaneously, and the display 12 indicates that the security release mode has been entered. "SEC" lights up for 2 seconds, and the compact disk is ejected when the compact disk is inserted. After that, a display requesting to insert the disk (lights up to the "DISC" disk insertion) is performed, and when the ID disk (or master disk) is inserted into the disk insertion hole 11, the TOC data written to the EEPROM 3 is erased. Then, after the indication that the ID disc deletion operation is completed (CANCEL is lit for 2 seconds), the disc is ejected once, and the ID disc deletion mode is terminated, and the normal operation (operation of the player 2 or the wireless receiver 8) is performed. do.

When a compact disc other than the ID disc (or a disc for which TOC data cannot be read) is inserted into the disc insertion hole 11, the display unit 12 displays an unreadable display and a disc insertion count (" ERR n "). 2 sec.) Is displayed, and then the disc is ejected once, and then a display requesting to insert the disc ("DISC" is lit until the disc is inserted) is performed.

When the compact disc other than the ID disc is inserted into the disc insertion hole 11 five times in succession, an indication requesting inventory to determine whether the compact disc to be inserted into the user by the display unit 12 is the ID disc. After the "COOL" flashes five times, the disc is ejected once, and then a display requesting to insert the disc (lit up to the "DISC" disc insertion) is performed.

In addition, if the insertion of the compact disc other than the ID disc into the disc insertion hole 11 has been performed 10 times in a row, it indicates an error condition and indicates that the device must be taken to the dealer (lit up to the "HELP" power supply end). The ID disc erase mode is terminated.

In this case, even after the power is cut off, the wireless receiving CD player 9 becomes inoperable and the inoperable state is not released unless the retailer performs the release operation using the master disc.

In other words, the insertion of discs other than ID discs is handled by the user's mistake up to the ninth time, and the tenth (continuous) is handled by a stolen person, thereby improving the anti-theft capability.

[Master Input Mode (Release Inoperable State by Store, etc.)]

If the display of the error state is displayed on the display unit 12 and the indication that the display should be taken to the store ("HELP" lights up until the power is turned off) is performed due to the failure of the security mode release or the release of the inoperable state, the store, etc. Only by inserting the retained master disc into the disc insertion hole, the inoperable state can be released. In this case, the security mode is also released. In other words, the data stored in the EEPROM 3 are erased.

Specifically, the display 12 ("HELP" is lit) indicating that the display unit 12 has entered the master input mode at the time of power-on is performed. Then, the specific operation (source selection) switch 16 and the simultaneous operation of the switches 3 and 4 are carried out so that the operation of disabling operation by the master disk is performed and the display requesting the insertion of the master disk ("DISC"). Is lit until disk insertion). When the master disc is inserted into the disc insertion hole 11, the inoperable state of the CD player 9 with the wireless receiver is released and at the same time, the TOC data subscribed to the EEPROM 3 are erased. After the indication that the inoperable state canceling operation is finished (“OK” is lit for 2 seconds), the disc is ejected once and the master disc input mode is terminated, and the apparatus is in the normal operation mode (player 2 or the wireless receiver ( 8) Go to Operation).

On the other hand, when a disc other than the master disc is inserted into the disc insertion hole 11, the display unit 12 displays an unreadable state with the number of disc insertions (?? ERR n ?? lights up for 2 seconds), and then Once the disc has been ejected, the display will ask you to insert the disc again (lit until ?? DISC ?? is inserted).

If the insertion of the compact disc, not the ID disc, into the disc insertion hole 11 is performed in multiples of five times (the fifth, tenth, ...), the display unit returns to the state when the power is turned on. 12) is displayed to indicate that the master input mode has been entered ("HELP" is lit), and there is a need for a specific operation to be performed in order to release the malfunction.

Next, the processing performed by the microprocessor 4 to realize these operations will be described.

3 is a flowchart showing the main routine of the processing performed by the microprocessor 4. By operating the ignition switch to turn on the car accessory switch (by operating the ignition key) or when the power switch of the CD player 9 with the wireless receiver is ON and the CD player 9 with the wireless receiver is operated. The process starts and first proceeds to step M1.

In step M1, it is determined whether the ID disk is set. If the ID disk is not set, the process moves to ID disk setting mode processing, and if the ID disk is set, the process goes to step M2. This determination is made whether or not the TOC data of the ID disk is stored in the EEPROM.

In the second step M2, it is determined whether the connection between the CD player 9 with the wireless receiver and the battery B is once dropped, and if the battery B is not separated, the process moves to ID disk erase mode processing. Go to step M3. This determination is made by the microprocessor 4 measuring the voltage across the connection terminals with the battery B and storing it when a certain voltage drop is detected.

In step M3, it is determined whether or not it is in the master bringing mode, and if not in the master bringing mode, the processing moves to the inoperable release mode; in the master bringing mode, the processing moves to the master input processing mode processing. This determination is made because the microprocessor 4 stores the failure of the inoperable release operation, the failure of the ID disk erase operation, and the like.

When the CD player 9 with the radio receiver is in operation from the above processing,

(a) If ID disc is not set, go to ID setting mode processing,

(b) If the detachment from the battery B of the CD player 9 with the radio receiver (disassembly) is not detected in the state where the ID disc is set, the process moves to the ID disc erase mode processing.

(C) If the detachment from the battery (B) of the CD player 9 with the wireless receiver is detected in the state where the ID disk is set, and if it is not in the master bringing mode, the processing moves to the inoperable release mode processing.

(d) When the master is in the bring mode, it moves to the master input processing mode.

Next, ID disc setting mode processing (also serving as security mode setting processing) will be described. 4 is a flowchart showing an ID disk setting mode performed by the microprocessor 4 of FIG.

When the main routine moves from the main routine to the ID disk setting mode processing, the processing starts and moves to step S1. It is determined whether or not a mode off operation has been performed. When the mode off operation is performed, the setting of the ID disk (EEPROM 3) is performed. Correction of the data is not performed, and the process shifts to the normal operation processing for controlling the operation of the player 2 and the radio receiver 8. If the mode off operation is not performed, the process moves to step S1. In addition, the mode off operation is performed by operations other than the setting start operation, such as operation of the source selection switches 16 and 17 and the play switch 23, and insertion of the compact disc into the disc insertion hole 11 of the CD player with the wireless receiver. In (9), normal operation is meant.

In step S2, it is judged whether or not the ID disc setting start operation has been performed. If so, it moves to step S3, and if not, it moves to the normal operation processing. The ID disc setting start operation is a predetermined specific operation. In this embodiment, the simultaneous operation of the source selection switch 16 and the first switch 18 is the ID disc setting start operation as described above. Determination of steps S1 and S2 is made by interrupt processing of each switch operation and insertion operation detection into the disc insertion hole 11 of the compact disc, and these interrupts move to the next process. In step S3, a display indicating that the ID disk setting mode has been entered (lights up for "SEC" for 2 seconds) is performed, and the flow proceeds to step S4. In step S4, the ejection process is performed when a disc is in the player 2. In step S5, a display ("DISC") instructs to insert the compact disc is performed, and the processes of steps S5 and S6 are repeated until the compact disc is inserted by the disc insertion judgment of step S6. When the compact disc is inserted, the process proceeds to step S7. If the TOC data of the inserted compact disc can be read normally, that is, it is appropriate as an ID disk, the process proceeds to step S8. Otherwise, the process moves to step S11. In step S8, the TOC data of the compact disc is written into EEPROM3 as identification data, and in step S9, an indication that the setting of the ID disc is completed ("SEC" is lit for 2 seconds) is performed, and in step S10, the compact disc is ejected. After that, the process moves on to normal operation. In step S11, the display indicates that the TOC data of the compact disc cannot be read normally ("ERR" is lit for 2 seconds), and in step S12, the compact disc is discharged and the process moves to step S13. In the step S13, it is determined whether the TOC data is incapable of being independent twice, and in the case of two consecutive times, it is determined that the disc itself is not suitable for the ID disc due to scratches, etc., and the process goes to step S14 to replace the disc. If it is displayed ("CHANGE" is lit for 2 seconds) and the reading cannot be performed twice in a row, the process returns to step S5 to continue processing.

Next, the ID disk delete mode processing (which also serves as the release of the security mode) will be described. 5 is a flowchart showing ID disc erasure mode processing performed by the microprocessor 4.

When the process is shifted from the main routine to the ID disk erasure mode processing, the process starts and moves to step P1 to determine whether the mode off operation has been performed, and if the mode off operation has been performed, deleting the ID disk (EEPROM 3). Data erasing) is not performed but shifts to the normal operation processing for controlling the operation of the player 2 and the radio receiver 8. If the mode off operation is not performed, the flow advances to step S2. The mode off operation is similar to the above ID disc setting mode processing, and operations other than the setting start operation include operations such as the source selection switches 16 and 17 and the play switch 23 and insertion of the compact disc into the disc insertion hole 11. Normal operation in the CD player 9 with the radio receiver is meant as in the operation.

In step P2, it is judged whether or not the ID disc deletion start operation has been made. If the operation is in this direction, step P3 otherwise goes to the normal operation processing.

The ID disc deletion start operation is a predetermined specific operation. In this embodiment, simultaneous operation of the source selection switch 16 and the second number switch 18 is the ID disc deletion start operation as described above. The determination of steps P1 and P2 consists of interrupt processing of each switch operation and detection of insertion operation into the disc insertion hole 11 of the compact disc, and moves from these interrupts to the next processing.

In the step P3, a display ("SEC" 2 focusing lights) indicating that the ID disk setting mode has been entered is performed, and the process moves to the step P4. In step P5, the ejection process is performed when a disc is in the player 2. In step P5, the insertion instruction display ("DISC") of the compact disc is performed, and the processes of steps P5 and P6 are repeated until the compact disc is inserted by the disc insertion judgment of step P6. When the compact disc is inserted, the P7 step is moved, and the inserted compact disc TOC data is stored in EEPROM3 (TOC data (ID disc TOC data)) or the TOC of the erasable master disc stored in the ROM in the microprocessor (4). Determine if it matches the data. If the TOC data match, the process moves to step P8 to erase the data in the EEPROM (3). In step P9, the indication that the ID disc has been deleted ("CANCEL") is turned on for 2 seconds, and after the compact disc is ejected in step P10, the process proceeds to normal operation.

In the step P11, it is determined whether the inconsistency of the TOC data is five or ten consecutive times. In step P14, it is determined whether the inconsistency of the TOC data is ten consecutive times. If the TOC data is mismatched 10 times in a row, go to step P15 and display the error status and the indication to take to the store (`` HELP '') until the power is turned off), and eject the compact disc in step P16. After that, move on to master input mode processing.

If the TOC data inconsistency continues five times, the display moves to step P17 to display a request for rechecking whether the inserted compact disk is an ID disk ("COOL" flashes five times), and the compact disk is ejected in step P18. After that, the process returns to step P2 to continue processing.

If the number of inconsistencies in TOC data is not five or ten consecutive times, go to step P12 to indicate that the display cannot be read or is different from the ID disk, and that the number of times is displayed ("ERR n" is lit for two seconds), and In step P13, the compact disc is ejected, and the process returns to step P5 to continue processing.

Next, the deactivation mode processing will be described. 5 is a flowchart showing an inoperable release mode process performed by the microprocessor 4. FIG.

When the user moves from the main routine to the inoperable release mode process, the process starts and moves to step Q1, where the ejection process is performed when a disc is in the player 2. In step Q2, the insertion instruction indication ("DISC" lighting) of the compact disc is performed, and the processes of steps Q1 and Q2 are repeated until the compact disc is inserted by the disc insertion judgment of step Q3. When the compact disc is inserted, the process proceeds to step Q4, where the TOC data of the inserted compact disc is either the TOC data (ID disc TOC data) stored in the EEPROM 3 or the erasure impossible in the ROM in the microprocessor 4; Determine if it matches the TOC data of the master disk. If the TOC data coincide, the process moves to step Q5 to release the inoperable state (to erase the memory shorted in the battery B). An indication of the completion of the inoperable release processing (lit for 2 seconds of " OK ") is performed, and the compact disc is ejected in step Q6 to move to normal operation processing.

In step Q7, it is determined whether the inconsistency of the TOC data is five or ten consecutive times. In step Q8, it is determined whether the inconsistency of the TOC data is ten consecutive times. If the TOC data is inconsistent ten times, the process goes to step Q15, the error status indication and the indication of going to the store (lighting until "HELP" is turned off) are performed, and the compact disc is removed in step Q16. After discharging, move to master input mode processing.

If the TOC data is inconsistent five times, the display moves to step P11 and a request for rechecking whether or not the inserted compact disk is an ID disk ("COOL" flashes five times) is performed and the compact disk is ejected in step P1. do. In step Q13, it is determined whether the forced transition operation to the master input mode has been performed. If it is performed, the process moves to step Q15. If not, in step Q14, the CD player 9 with the wireless receiver is reconnected to the battery B. It is determined whether 1 hour has elapsed from the above, and the process of step Q11 to Q13 is repeated until 1 hour has elapsed, and when 1 hour has elapsed, the process returns to step Q1 and continues the process. The forced execution operation to the master input mode is a predetermined specific operation. In this embodiment, simultaneous operation of the source selection switch 16 and the first and second number switches 18 is forced to the master input mode as described above. Configure transition operations.

If the number of inconsistencies in the TOC data is not five or ten consecutive times, the flow moves to step Q9 to display the fact that the data cannot be read or differ from the ID disc and display the number of times ("ERR n" is lit for 2 seconds), In step Q10, the compact disc is ejected, and the process returns to step Q2 to continue processing. Next, the master input mode processing will be described. 7 is a flowchart showing master input mode processing performed by the microprocessor 4.

When the master routine proceeds to the master input mode process, the process starts and moves to step R1, the display indicating that the master input mode has been entered (" HELP " 2 focus, etc.) is made, and the process moves to step R2.

In step R2, it is determined whether the master input start operation has been performed, and if so, the process moves to step R3. If not, the processing of steps R1 and R2 is repeated. The master input start operation is a predetermined specific operation. In this embodiment, simultaneous operation of the source selection switch 16 and the third and fourth switches 18 is constituted as the master input start operation as described above.

In the step R3, the ejection process is performed when a disc is in the player 2. In step R4, the insertion instruction display ("DISC") of the compact disc is performed, and the processes of steps R3 and R4 are repeated until the compact disc by the disc insertion judgment is inserted in step R4. When the compact disc is inserted, the process moves to step R5.

In step R5, it is determined whether the TOC data of the inserted compact disk matches the TOC data of the non-erasable master disk stored in the ROM in the microprocessor 4. If the TOC data match, the process moves to step R6 to erase the data of the EEPROM (3). In step R7, the master input process is finished ("OK" is lit for 2 seconds), and in step R8, the compact disc is ejected, and then the normal operation process is executed.

If the TOC data do not match, the process moves to the R8th step and it is determined whether the mismatch of the TOC data is continued by a multiple of five. If the TOC data inconsistency continues for a multiple of five times, the process moves to step R10, the compact disc is ejected, and the process returns to step R1 to continue processing. If the number of inconsistencies in TOC data is not a multiple of five consecutive times, the flow moves to step R11 to indicate that the data cannot be read or is different from the master disk, and that the number of times is displayed ("ERR n" is lit for 2 seconds), and P12 After discharging the compact disc in step 1, the process returns to step R3 to continue processing.

By the above processing, the above security operation, setting of the security mode (setting of the ID disk), releasing of the security mode (deleting the ID disk) and the like can be realized.

As described in detail above, in the present embodiment, an anti-theft device for a CD player for a vehicle having a built-in player is constructed by using the compact disc itself as a key.

This achieves an anti-theft device that is easy to operate without the inconvenience of using a secret identification number.

In the present embodiment, only one ID disc can be set, but by setting a rule allowing a plurality of ID discs to be set, the security mode or the like is operated until all of the ID discs are inserted into the player 2. The anti-theft ability can be increased by preventing the incapacity of dissolution.

Alternatively, the provision may be made such that the inoperable state such as the security mode is released by inputting any one of the plurality of ID discs. In such a case, the user of the vehicle holds one of the ID disks and using the ID disk, the user can release the inoperable state such as the security mode. Such a functional correction can be made by slightly modifying the setting portion of the disk and the portion in which the inserted compact disk is compared with the TOC data stored in the EEPROM 3 among the processing contents of the microprocessor 4.

Before describing in detail another embodiment of the present invention, the signal recording format of a small disk will be briefly described. FIG. 16 is a diagram for explaining a recording format of a small disk.

There are three basic types of small diskettes: non-correctable play-only pre-copied discs (see also Section 16A); A recordable disc capable of recording and correction (see also 16B); There are mixed discs (see also part 16B) which can not be corrected in part and which can be recorded and corrected in part.

The pre-coated disc includes a lead-in area 131 and a data area 132 as shown in FIG. 16A. Table of contents (TOC) data and data specific to the disc (number of songs, starting positions of programs, playing time, etc.) are recorded in the lead-in area 131. Data such as music is recorded in the data area 132. A so-called stepper mold is used to produce a pre-coated disc, and resin such as polycarbonate is injection molded to form a disc including pits and lands on the signal surface. Aluminum light is then sprayed onto the disk surface as a reflective film. Such discs are therefore impossible to record and correct.

The recordable disc has a lead-in area 141, a user TOC area 142, and a data area 143, as shown in FIG. 16B. In the lead-in area 141, data indicating the positions of the user TOC area 142 and the recordable and correctable data area 143, and data indicating that the disc is a recordable disc, have a manufacturing process similar to that of the pre-coated disc. Are recorded. However, such data is almost identical to that on all recordable discs, but is not used as data for discriminating a particular disc. Data recorded by the user is recorded in the data area 143, and user TOC data (number of songs, start position of the song, playing time, etc.) for data recorded in the data area 143 is stored in the user TOC area 142. Is written on. The magnetic film is formed on the user TOC area 142 and the data area 143. By applying a magnetic field and irradiating a laser beam, magnetization remains in the magnetic film and data is recorded. Then, by irradiating a laser beam, magnetization polarizes the reflected light and data is read from it.

The mixed disk includes a lead-in area 151, an uncorrectable data area 152, a user TOC area 154, and a recordable and correctable data area 153, as shown in FIG. 16C. In the lead-in area 151, data such as TOC data, which is disc-specific data (the number of songs recorded in the data area 152 that cannot be corrected, the position of the song, the playing time, etc.) and the data that cannot be corrected ( 152) Data indicating the positions of the user TOC area 154 and the recordable / correctable data area 153, and data indicating that the disc is a mixed disc, are recorded using a manufacturing process similar to that of the pre-coated disc. Data such as music is also recorded in the uncorrectable data area 152 using a production process similar to that for the pre-coated disc.

As with a recordable disc, data in which data (such as music) is recorded by the user is recorded in the data area 153, while user TOC data for data recorded in the data area 153 is stored in the user TOC area. Is recorded at 152.

The mixed disc is manufactured by using both production processes of the pre-radiated disc and the mixed disc.

Therefore, the distinction between these disks is carried out with reference to the data recorded in the lead-in area 151. The pre-copied disc and the mixed disc are judged to be suitable for setting the identification data because the recording medium identification data cannot be corrected, and at the same time, the recordable disc is judged to be inappropriate for setting the identification data because the recording medium identification data is correctable. .

Next, a security device according to the present invention will be described.

According to the security device of this embodiment, the user selects a specific small disc and records the contents (TOC data) recorded in the lead-in area 131 in a memory such as an EEPROM provided in the audio device. The TOC data of the inserted small disk is then compared with the contents of the memory. If they match, the audio device is set to be operable. Recording to ROM is performed using a ROM writer built into the audio device in advance. In other words, the contents recorded in the lead-in area 131 of the small disk inserted by the predetermined operation are recorded in the ROM.

9 is a block diagram of an audio device (a compact disc player with a built-in player) according to another embodiment of the present invention. The small disk player 109 having the built-in wireless receiver includes a player 102 used for reading information from the small disk 101, reproducing audio signals, reading lead-in information from the small disk, and the like; A wireless receiver for receiving radio broadcast 108; Information storage EEPROM used to release the security from player 102 or from wireless receiver 108 for speaker 107 output.

The microprocessor 104 is directly connected to one end of the battery, the other end is connected through the ignition switch (IGSW 1), and is connected through the microprocessor (IGSW 1), and checks the connection state of the battery. The microprocessor 104 also includes a ROM (read only memory) in which the program and TOC contents of the master disc are recorded.

The CD player 109 thus produced is detachably attached to the console panel of the monitor device. Connectors 151 and 152 are provided respectively on the power line between the CD player 109 and the battery B1 and on the signal line between the CD player 109 and the speaker 107. When the CD player 109 is attached to the console panel, the power line and the signal line are electrically connected by the connectors 151 and 152, respectively; When it is removed from the console panel, the power line and signal line connections are disconnected at the connectors 151 and 152.

The EEPROM 103 is a memory capable of retaining the stored contents without the need to supply power.

When the driver turns on the ignition switch IGSW1, power from the battery B1 is supplied to the ignition circuit and then generates a spark necessary for ignition by applying a pulse voltage to the spark ignition internal combustion engine 154.

Next, operation of the audio device according to an embodiment of the present invention will be described. 10 is a schematic diagram showing the front layout of a vehicle audio device (MD player with a built-in player).

A disk insertion hole 111 for inserting a small disk, a display unit 112 for producing various displays, and many function switches are arranged on the front panel of the MD player 109 in which the wireless receiver is built.

The display unit 112 displays information such as the number of playing songs, playing time, volume, reception frequency, and reception band AM and FM on the small disk according to the operation of the player 102 and the wireless receiver 108.

Reference numerals 113 and 114 denote control switches for sound quality, balance and fader (front and rear balance), and corresponding items (volume, sound quality, balance or fader) selected by the mode switch 15 are the control switches 113 and 114. Increase or decrease by The adjustment item changes sequentially each time the mode switch 115 is operated.

If the mode switch 115 is not operated for more than a predetermined time, the mode automatically returns to the volume control mode (the item to be adjusted is the volume).

Reference numerals 116 and 117 denote selection switches of the source. The player 102 selects the sound source when the switch 116 is actuated and the radio receiver 108 is selected when the switch 117 is actuated.

Reference numeral 118 denotes a group of numeric switches used to select music programs during the operation of the player 102 and to designate radio stations during the operation of the radio receiver 108. For example, if the number 3 switch is operated during the operation of the player 102, the following playback switch 123 is subsequently played for song 3 on the MD. In this way, if switch 2 is momentarily activated (e.g., less than 2 seconds) during operation of radio receiver 108, the reception frequency stored in the memory corresponding to switch 2 is read from the memory, and radio receiver 108 ) Is tuned to the automatically assigned frequency; On the other hand, when switch 2 is pressed, it stops for a while (for example, 2 seconds or more), and the currently received frequency is recorded in the memory corresponding to switch 2.

Reference numeral 119 denotes a band selection switch used to switch between the reception details AM and FM of the radio receiver 100. Reference numerals 120 and 121 denote UP and DOWN switches used to convert the reception frequency. When the DOWN switch is activated, the reception frequency is decreased. When the UP switch is activated, the reception frequency is increased.

Reference numeral 122 is an eject switch; When this switch is operated, the small disc loaded in the player 102 is deleted through the disc insertion hole 111.

Reference numeral 123 denotes a play switch of the MD player 102; If this switch is operated during playback of the small disc, playback is interrupted; if it is operated while playback is interrupted, playback of the small disc is resumed.

Next, the security-related operation of the audio device in the embodiment of the present invention will be described.

"Security action"

The security function is activated when the MD player 109 in which the wireless receiver is embedded and set in the security mode is removed from the vehicle and mounted in another vehicle. That is, when the MD player 109 with the wireless receiver is set in the secure mode, the security function is activated when the MD player 109 with the wireless receiver is detached from the battery and then connected to the battery again. More specifically, when the microprocessor 104 detects a battery connection state, that is, a change in the battery connection state from a change in power source and thus detects a state in which the MD player 109 is detached, the security device is activated. Once the security device is activated, the MD player 109 with the built-in wireless receiver is inoperative. In other words, the microprocessor 104 does not accept any switch operation other than the predetermined designated operation.

To release the inoperable state, you must insert the disc you specified. Alternatively, take the MD player 109 with a built-in radio receiver to a manufacturer or a dealer to insert a master disc held by the seller to release the inoperable state and make the MD player 109 with a built-in wireless receiver operable.

More specifically, the MD player 109 with the built-in wireless receiver is once removed from the battery and at the same time, the TOC data of the security mode (identification (ID) disc is stored in the EEPROM 103 in the MD player 109 with the built-in wireless receiver. Is stored, the MD player 109 with the wireless receiver turned on does not operate and an indication (?? SEC ') is displayed on the display 112 indicating that the device is inoperable due to the operation of the security device. Lights up for 2 seconds). Then an indication to request the disc to be inserted (?? DISC 'remains on until the disc is inserted) appears. When the ID disc is inserted through the disc insertion hole 111, a security state is excluded and an indication (?? OK 'lights up at that moment) indicating that the MD player in which the radio receiver is embedded is now operable. The disc is then ejected and the device enters normal operation mode (for operation of player 102 or radio receiver 108).

On the other hand, when a small disc other than an ID disc (or a disc for which TOC data is not read correctly) is inserted through the disc insertion hole 111, the display unit 112 displays an unreadable state with the number of times the disc is inserted. do. (?? ERR n ?? lights up for 2 seconds). Then the disc is ejected and the display asking you to insert the disc reappears (?? DISC 'remains on until the disc is inserted).

When the small disc is inserted into the disc through the disc insertion hole 111 five times in succession, the display unit 112 displays a request for the user to recheck whether the inserted small disc is the ID disc. (?? COOL 'lights up for 1 hour after the device is reconnected to the battery), then the disc is ejected (after an hour after reconnecting the battery) and the indication to insert the disc appears again (disc ?? DISC 'lights up until is inserted). In this case, if the assigning switches are operated in a particular way (source select switch 116 and switches 1 and 2 at the same time), an indication is displayed indicating the fault condition and suggesting that the device be brought to the dealer. Is displayed (?? HELP 'lights up until the power is turned off) and the ID disc erase mode is exited. Because of the long waiting time for the ID disc to be inserted for the sixth time, the user can decide not to wait for a long time and give up five attempts to wake up by himself. In this case, the device is taken to the dealer so that the dealer can immediately perform the task of disabling it.

Also, if a small disc other than an ID disc is inserted ten times in the disc insertion hole 111, an indication indicating an error condition and suggesting that the device be brought to the dealer again is displayed (until the power is turned OFF until ?? HELP ' Lights up) The ID disc erase mode is terminated.

Once the error is indicated and a suggestion is made to bring the device to the dealer, the MD player 109 with the built-in radio receiver remains inoperable even when the power is turned off, and the inoperative status is maintained by using the master disc at the dealer. It is not released until the release operation is performed. In other words, the insertion of a disc other than an ID disc is treated as a simple mistake on the user side up to nine times, and if the attempt fails in the tenth consecutive time, the attempt is regarded as an act of theft. This approach improves antitheft performance.

[Security Mode Settings and ID Disk Settings]

The security mode is set by a user operation of recording TOC data of the identification (ID) disc to the EEPROM 103 in the MD player 109 in which the radio receiver is built in (ID disc setting operation). That is, the microprocessor 104 checks whether the data has been stored in the EEPROM 103 (e.g., whether the initial state is usually? 0 ??) or not, and whether the device will be set in the secure mode. Determine.

The ID disc setting operation is performed by performing a special operation when power is supplied to the MD player 19 having a built-in wireless receiver, first setting the mode to the ID disc setting mode, and then displaying the wireless receiver and the display unit of the MD player 109. According to the indication 112, it is carried out by inserting a small disk to be used as an ID disk through the disk insertion hole 111.

More specifically, when power is supplied, first, the source selection switch 116 and the first switch 118 are simultaneously pressed to enter the security setting mode. At this time, the display unit 112 displays an indication indicating that the eye setting mode has been entered (?? SEC 'lights for 2 seconds), and if a small disk is already inserted, the small disk is ejected.

Then, an indication requesting the insertion of the disc is displayed (?? DISC 'remains on until the disc is inserted). When a small disk set as an ID disk is inserted into the disk insertion hole 111, TOC data of the small disk is read and recorded as identification data in the EEPROM 103.

After the display indicating that the ID disc setting operation is complete (?? SEC 'lights for 2 seconds), the disc is ejected once and the ID disc setting mode is exited. The device is in a normal operation mode (for operation of player 102 or radio receiver 108).

For example, if a small disk is not suitable for the ID disk because a small disk whose TOC data cannot be read due to scratches on the disk is inserted as the ID disk, that is, the TOC data from the small disk inserted into the disk insertion hole 111. Can not be read, an indication indicating the unreadable state is displayed on the display 112 (?? ERR 'lights up for 2 seconds), then the disc is ejected and the mark requesting to insert the disc appears again. . (?? DISC 'lights up until the disc is inserted).

If the reading of the TOC data fails twice in succession, an indication for requesting disk replacement is displayed on the display 112 (?? CHANGE 'lights up for 2 seconds). Then the disc is ejected and the display requesting to insert the disc appears again ('DISC' lights up until the disc is inserted).

On the other hand, if there is no problem in the disc state itself and the TOC data is successfully readable but the inserted disc is a correctable recordable disc, the display unit 112 indicates that the disc is unsuitable ('UNSUIT' for 2 seconds). light on). Then the disc is ejected again and the display requesting to insert the disc appears again. ('DISC' remains on until the disc is inserted)

[Release Security Mode]

The security mode is released by erasing (initializing) the identification data stored in the EEPROM 103. That is, the microprocessor 104 erases the identification data stored in the EEPROM 103 when a specific operation is performed.

The specific operation first sets the mode to the ID disk erasing mode and performs a special operation when power is supplied to the MD player 109 in which the radio receiver is embedded, and then the MD player 109 in which the wireless receiver is embedded. According to the display displayed on the display unit 112, a predetermined ID disc or a master disc held by the seller is inserted into the disc insertion hole 111. FIG.

More specifically, upon powering up, first the source select switch 116 and the second switch 118 are pressed simultaneously to enter the security release mode. At this time, the display unit 112 indicates that the security release mode has been entered ('SEC' is lit for 2 seconds), and if a small disk is already inserted, the small disk is ejected. Then an indication to request the disc to be inserted is displayed. ('DISC' remains on until the disc is inserted). When the ID disc (or master disc) is inserted into the disc insertion hole 111, the TOC data recorded in the EEPROM 103 is erased. When the display indicates that the inoperation release operation is complete (?? OK 'lights for 2 seconds). The disc is ejected once and the master disc input mode ends. The device enters a normal mode of operation (for the operation of player 102 or radio receiver 108).

On the other hand, when a disc other than the master disc is inserted through the disc insertion hole 111, the display unit 112 displays an unreadable state with the number of times the disc has been inserted. ('ERR n' lights up for 2 seconds). Then the disc is ejected once and a request mark appears again indicating the disc insertion (?? DISC 'keeps flashing until the disc is inserted).

In addition, each time a small disc other than the master disc is continuously inserted into the disc insertion hole five times, five times, ten times, ..., the state returns to the same state as when the power was turned on. In addition, the display unit 112 once again indicates that the master input mode has been entered ('HELP' is lit), and if an inoperable state is to be released, a special operation must be performed.

Next, processing performed by the microprocessor 104 to realize the above operation will be described.

11 is a flowchart illustrating the main routine of the processing performed by the microprocessor 104.

The MD player 109 with the wireless receiver is operated by turning on the accessory switch of the vehicle (by operating the ignition switch) or by turning on the power switch on the MD player 109 with the wireless receiver, and the processing is started. Proceed to step A1.

In step A1, it is determined whether the ID disk is set. If the ID disc is not set, the process goes to the ID disc setting mode. If the ID disk is set, the process proceeds to step A2. This determination is made according to whether the TOC data of the ID disc is stored in the EEPROM 103.

When the MD player 109 with a built-in wireless receiver becomes an operation state for the above processing,

(a) If the ID disc is not set, the process shifts to the ID setting mode.

(b) In the state where the ID disc is set, if a short circuit from the battery B1 of the wireless MD player 109 in which the radio receiver is built in is not detected, the process shifts to the ID disc erase mode,

(c) If the short circuit from the battery B1 is not detected by the MD player 109 in which the wireless receiver is built-in and the mode is not the master bringing mode with the ID disk set, the process shifts to the disabled operation mode. and,

(d) If in master bring mode, the process shifts to master input processing.

Next, processing of the ID disc setting mode (which also includes the security mode setting process) will be described. 12 is a flowchart illustrating the processing of the ID disk setting mode performed by the microprocessor 104. As shown in FIG.

When the process goes from the main routine to the ID disc setting mode process, the process starts and the process proceeds to step B1 to determine whether or not a mode-off operation has been performed. If it is determined that the mode off operation has been performed, the ID disc setting operation (data recording of EEPROM 103) is skipped and the process proceeds to the normal operation processing for controlling the operation of the player 102 and the radio receiver 108. Otherwise, the process proceeds to step B2. The mode off operation is an operation other than the setting start operation, and includes an MD having a built-in wireless receiver such as an operation such as the source selection switches 116 and 117 and the play switch 123, an operation of inserting a small disk into the disc insertion hole 111, and the like. Means the normal operation of the player 109.

In step B2, it is determined whether the ID disk setting operation is performed.

If the answer is YES, go to step B3. If the answer is no, go to normal operation. Initiating the ID disc setting is performed by operating specific switches in a special manner; In this embodiment, as described above, the ID disc setting start operation is performed by simultaneously pressing the source selection switch 116 and the first switch 118.

The judgments in steps B1 and B2 are made by performing an interrupt process for detecting a plurality of switch operations or an insertion operation of the small disk into the disk insertion hole 111, and proceed to the next processing with these interrupts.

In step B3, an indication indicating entering the ID disc setting mode is displayed ('SEC' flashes for 2 seconds). Then proceed to step B4. If a disc is inserted into the player 102 in step B4, the disc is ejected. In step B5, the 'DISC' indication indicating the insertion of the small disc is displayed, and the processing of steps B5 and B6 is repeated until it is determined that the small disc is inserted in step B6. When the small disk is inserted, the process proceeds to step B7 where the inserted small disk is a suitable disk, that is, whether the inserted disk is not a recordable disk (or the inserted disk is a premastered disk or a mixed disk). Cognition). If the disc is a pre-copyed disc or a mixed disc (suitable disc), the process proceeds to the eighth step; On the other hand, if it is a recordable disc (ie, an unsuitable disc), the process proceeds to step B12.

In step B8, it is determined whether the TOC data of the inserted small disk is read correctly, that is, whether the small disk is suitable for the ID disk. If the data is read correctly, go to step B9; Otherwise, processing proceeds to step B14.

In step B9, TOC data of the small disk is recorded in the EEPROM as identification data. Then, in step B10, an indication indicating that the ID disk setting is completed is displayed ('UNSUIT' flashes for 2 seconds), and in step B13, the small disk is ejected, and then the procedure goes to step B16.

In step B14, an indication indicating that the TOC data of the small disk cannot be read normally is displayed ('ERR' is lit for 2 seconds), and then in step B15, the small disk is taken out and the process proceeds to step B16. If the reading of the TOC data fails two times in succession in step B16, the disk is determined to be unsuitable as the ID disk due to scratching or the like, and the process proceeds to step B17. At this time, an indication for requesting a disk change is displayed ('CHANGE' lights up for 2 seconds). If the readout is not two consecutive times, the process returns to step B5 to repeat the process.

Next, the processing of the ID disc erasure mode (including the secure mode release operation) will be described. FIG. 13 is a flowchart for explaining the process of the ID disc erase mode performed by the microprocessor 104. As shown in FIG.

When the processing is shifted from the main routine to the ID disk erasing mode, the processing starts and the process proceeds to step C1, where it is determined whether the mode-off operation has been performed. If it is determined that the mode off operation has been performed, the ID disk erase operation (erasing of data in the EEPROM 103) is omitted and the process is shifted to the normal operation for controlling the operation of the player 102 and the radio receiver 108. As described in the processing of the ID disc setting mode, the mode off operation is an operation other than the setting start operation, and the operation such as the source selection switches 116 and 117 and the play switch 123, or the small disc is inserted into the disc insertion hole 111; Means a normal operation with respect to the MD player 109 in which a radio receiver is incorporated, such as an operation to be inserted into the receiver.

In step C2, it is determined whether an operation to start deleting an ID disc is performed. If the answer to the judgment is YES, then the process proceeds to step C3. If the answer is no, the process proceeds to normal operation. The ID disc erase start operation is performed by operating specific switches in a special manner. In the present embodiment, as described above, pressing the source select switch 116 and the second switch 118 simultaneously constitutes an ID disk erase start operation. The determination of steps C1 and C2 is performed by interrupting or detecting the insertion of the small disk into the disk insertion hole 111 in order to detect the operation of various switches. From these interrupts, processing proceeds to the next step.

In step C3, an indication indicating entering the ID disc setting mode is displayed ('SEC' lights for 2 seconds), and then processing proceeds to step C2. In step C4, if a disc has already been inserted into the player 102, the disc is ejected. In step C5, an indication 'DISC' indicating to insert the small disc is displayed, and the processes of steps C5 and C6 are repeated until it is determined in step C6 that the small disc is inserted.

If the small disk has been inserted, the process is shifted to step C7 so that the TOC data of the inserted small disk is stored in the TOC data (TOC data of the ID disk) recorded in the EEPROM 103 or in the ROM held in the microprocessor 104. It is judged whether or not the master disc TOC data is recorded permanently. If the TOC data match, the process proceeds to step C8 to delete the data recorded in the EEPROM 103. Then, in step C9, an indication indicating completion of the ID disc erasing operation is displayed ('CANCEL' lights up for 2 seconds), and in step C10, the small disc is ejected, and then processing proceeds to the normal operation.

In step C11, it is determined whether the inconsistency of the TOC data is five or ten consecutive times. If the TOC data inconsistency occurs 10 times in a row, the process proceeds to step C15 where an indication is indicated indicating an error state and suggesting that the device be brought to the dealer ('HELP' is turned on until the power is turned off). have). Then, in step C16, the small disk is ejected, and the process shifts to the master input mode.

On the other hand, if the mismatch of TOC data occurs five times in a row, the process proceeds to step C17. At this time, an indication is displayed requesting the user to recheck whether the inserted small disk is an ID disk ('COOL' lights up five times). Then, the small disc is ejected in step C18, and the process returns to step C2 to continue processing.

If the inconsistency of the TOC data is not five or ten consecutive times, the process proceeds to step C12 to indicate that the disc indicating the unreadable state or the inserted disc is not an ID disc, and an indication indicating the number of inconsistencies is also displayed. ('ERRn' is emitted for 2 seconds). Then, in step C13, the small disc is ejected, and the process proceeds to step C5 to continue processing.

Next, the processing of the inoperative state canceling mode will be described.

14 is a flowchart illustrating the processing of an inoperable mode in which the microprocessor 104 performs.

If the processing shifts from the main routine to the inoperable disabled state, the processing starts and the process proceeds to step D1. If a disc is inserted in the player 102, the disc is ejected. In step D2, an indication for instructing the insertion of the small disc is displayed ('DISC' is lit), and the processes of steps D2 and D3 are repeated until it is determined in step B3 that the small disc is inserted. When the small disk is inserted, the process proceeds to step D4 so that the TOC data of the inserted small disk is permanently stored in the TOC data (TOC data of the ID disk) stored in the EEPROM 103 or in the ROM held in the microprocessor 104. Determine whether or not the recorded master disc TOC data match. If the TOC data does not match, the process proceeds to step D5 to cancel the inoperable state by erasing the memory in which the short circuit from the battery B1 is stored, and an indication indicating that the inoperable state canceling organization is completed is displayed. ('OK' lights up for 2 seconds). Then, the small disk is ejected in step D6 and the process proceeds to the normal operation.

In step D7, it is determined whether the TOC data mismatch is continuous five or ten times. In step D8, it is determined whether the TOC data inconsistency has been repeated ten times. If the TOC data inconsistency is 10 consecutive times, the display proceeds to step D15, indicating an error condition and displaying an indication to bring the device to the dealer ('HELP' is on until the power is turned off). Then, in step D16, the small disk is ejected, and then the process shifts to the master input mode.

On the other hand, if the mismatch of TOC data occurs five times consecutively, the process proceeds to step C11, and an indication for requesting the user to recheck whether the inserted disc is an ID disc is displayed ('COOL' flashes five times). . Then, in step D12, the small disk is ejected. In step D13, it is determined whether the operation for shifting to the master input mode has been performed. If the answer to the determination is YES, the process proceeds to step D15. Otherwise, the process proceeds to step D14 so that the MD player 109 with the wireless receiver is reconnected with the battery B1. Determine if one hour has elapsed. The processes from steps D11 to D13 are repeatedly executed until one hour has elapsed. After an hour has elapsed, the process proceeds to step D1 to repeat the process. The operation of forcing the transition to the master input mode is performed by operating a switch in a predetermined specific manner. In this embodiment, as described above, the source selection switch 116 and the first and second switches 118 are simultaneously used. Pressing constitutes a forced execution operation into the master input mode.

If the number of occurrences of TOC data inconsistency is neither five nor ten, the processing shifts to step D9 to display an indication indicating an unreadable state or that the inserted disc is not an ID disc ('ERRn'). Then, the small disk is ejected in step D10, and the processing returns to step D2 to repeat the processing.

Next, the processing of the master input mode will be described. 15 is a flow chart illustrating the processing of the master input mode performed by the microprocessor 104.

When the process is shifted from the main routine to the master input mode, the process of step E1 is started, and an indication indicating that the master input mode has been entered is displayed ('HELP' lights up for 2 seconds). The process then proceeds to step E2.

In step E2, it is determined whether the master input start operation is performed. If the answer to the judgment is YES, the process proceeds to step E3, otherwise the processes of steps E1 and E2 are repeated until the start operation is performed. The master input start operation is performed by operating specific switches in the manner described above; In this embodiment, the master input start operation is performed by simultaneously pressing the source selection switch 116 and the third and fourth switches 118 as described above.

In step E3, an indication 'DISC' indicating to insert the small disc is displayed, and the processes of steps E3 and E4 are repeated until it is determined in step E4 that the small disc is inserted. When the small disc is inserted, the process proceeds to step E5.

In step E5, it is determined whether or not the TOC data of the inserted disk is consistent with the master disk TOC data permanently stored in the ROM held in the microprocessor 104. If the TOC data match, the process proceeds to step E6 to delete the data recorded in the EEPROM 103. In step E7, an indication indicating the end of the master input processing is displayed ('OK' lights up for 2 seconds). Then, the small disk is ejected in step E8, and then the processing proceeds to the normal operation.

If the TOC data does not match in step E5, the process proceeds to step E9 to determine whether TOC data inconsistency has occurred continuously with an integer multiple of five. If the mismatch of TOC data occurs continuously with an integer multiple of five, the process shifts to step E10 to eject the small disk, and then returns to step E1 to repeat the process. On the other hand, if the number of occurrences of inconsistency of TOC data is not an integral multiple of five, the process proceeds to step E11 and displays an indication of an unreadable state or an indication of the number of occurrences while indicating that the inserted disc is not the master disc. ('ERRn' blinks for 2 seconds). Then, in step E12, the small disk is ejected in step E12, and the processing is repeated in step E3.

With the above processing, the above security operation, setting of security mode (setting of ID disk), security mode canceling (deleting ID disk) and the like can be realized.

As described in detail above, in the present embodiment, the anti-theft device of the MD player in which the wireless receiver for a vehicle is incorporated is configured using the small disk itself as a key. This configuration is an anti-theft device that is easy to operate without the inconvenience of using a secret identification number.

In this embodiment, only one ID disc can be set, but a plurality of ID discs can be set and an inoperable state, a security mode, etc. cannot be released until all discs are inserted into the player 102. You can also improve the anti-theft performance by making. Alternatively, the provision may be made so that the inoperable state, security mode, etc. can be released by inserting one of the plurality of ID discs. In such a case, for example, each vehicle user holds one of the ID disks, and using the ID disk, the user can release the inoperable state, the security mode, and the like. Such functional correction is possible by slightly correcting (changing) the ID disc setting portion and the portion comparing the TOC data stored in the EEPROM 103 with the inserted small disc in the processing contents performed by the microprocessor 104.

According to the present invention, manual entry of a secret identification number is not necessary for releasing the security operation and there is no need to store the secret identification number. This excludes the possibility that the user forgets the identification number and cannot release the security operation. In addition, since the security operation cannot be released without using a specific recording medium, the security capability is improved.

In addition, when the identification data of the recording medium can be corrected (changed), the recording of the specific data of the recording medium into the memory as the identification data is prohibited, and an inappropriate recording medium as the security identification recording medium is not set as the identification recording medium. Do not. This prevents it from being impossible to release the inoperable state of the audio device by inadvertently correcting the data of the recording medium.

In addition, the security capability can be further improved by using a method requiring a password input in the method of the present invention.

Claims (11)

Audio to prevent theft of an audio device for reproducing a signal recorded on the recording medium, in which an audio device in an inoperable state becomes operable when the data recorded on the recording medium in the reproduction state matches the identification data stored in the memory. In the security device of the device, First mode switching means for switching the mode of the apparatus to the identification medium setting mode in which the identification data can be stored in the memory; And The data recorded on the recording medium is stored in the memory when the recording medium is in the reproducing state, when the first mode switching means is switched to the identification medium setting mode and no identification data is stored in the memory. And identification data storage means for storing the identification data as identification data. Preventing the theft of an audio device reproducing a signal recorded on the recording medium, which makes it possible to operate the audio device in an inoperable state when the data recorded on the recording medium in the reproduction state and the identification data stored in the memory coincide. In the security device, Second mode switching means for switching the device to an identification medium release mode capable of erasing identification data stored in the memory; And When the recording medium on which data corresponding to the identification data stored in the memory is recorded in the reproducing state in the state of being switched to the identification medium release mode by using the second mode switching means, the identification data stored in the memory is stored. And first identification data erasing means for erasing, wherein the identification data erasing means erases the identification data from the memory by initializing the memory. Security that prevents theft of an audio device reproducing a signal recorded on the recording medium, which makes the audio device in an inoperable state operable when the data recorded on the recording medium in reproduction state matches the identification data stored in the memory. In the apparatus, First mode switching means for switching the mode of the apparatus to an identification medium setting mode in which identification data can be stored in a memory; The mode of the device is switched to the identification medium setting mode in which the identification data can be stored in the memory and the identification data is not stored in the memory. Identification data storage means for storing data in the memory as the identification data; Second mode switching means for switching the device to an identification medium release mode capable of erasing identification data stored in the memory; When the recording medium on which data corresponding to the identification data stored in the memory is recorded in the reproducing state in the state of being switched to the identification medium release mode by using the second mode switching means, the identification data stored in the memory is stored. And first identification data erasing means for erasing, wherein the identification data erasing means erases the identification data from the memory by initializing the memory. 2. The security apparatus of claim 1, wherein the recording medium includes a compact disc, and the identification data is a list of contents data of the compact disc. 4. The method of claim 3, wherein the second mode switching means includes a plurality of switches, and setting the mode of the security device to the identification medium setting mode is performed by simultaneously pressing at least one of the plurality of switches in combination. Security device of an audio device, characterized in that the. When the recording medium is inserted into the audio device while the audio device is inoperable and the data recorded on the removable recording medium during playback matches the identification data stored in the memory, the audio device matches the identification data stored in the operating state. In the security device of the audio device to switch the audio device when the operation state, and to reproduce the signal recorded on the removable recording medium, Read-only memory (ROM) storing master data on a master recording medium; and When a removable recording medium is inserted into the audio device and data recorded on the removable recording medium during playback matches the master data stored in the read-only memory, the removable recording medium is ejected from the audio device and the audio device is in an inoperable state. Inoperable release means for switching to an operable state, Security device of an audio device, characterized in that consisting of. When the recording medium is fed into the audio device while the audio device is in the inoperable state and the data recorded on the recording medium during the playback state matches the identification data stored in the memory, the audio device is switched to the operable state and recorded on the recording medium. In the security device of an audio device that can reproduce the signal, A read-only memory (ROM) storing master data in a master recording medium; Inoperation releasing means for switching the audio device from the inoperable state to an operable state when the data recorded on the recording medium matches the master data stored in the read-only memory during the reproduction state; Mode switching means for switching a mode of the security system to an identification medium erasing mode in which identification data stored in a memory is erased; Identification stored in the memory when a master recording medium having recorded data that matches the master data stored in the read-only memory (ROM) is in the playback state and the mode of the security system is switched to the identification medium erasing mode by the mode switching means. And an identification data erasing means for erasing data. 12. The apparatus of claim 11, wherein the security device further comprises identification data erasing control means for controlling the data erasing means when the mode of the security device is switched to the identification medium erasing mode by the mode switching means, The identification data erasing control means cannot erase the identification data stored in the memory when a discrepancy between the data recorded on the recording medium and the identification data stored in the memory continues to be detected a predetermined number of times during the reproduction state. And said identification data erasing control means is capable of erasing identification data stored in the memory only when the data recorded on the recording medium matches the master data stored in the read-only memory during the playback state. When the recording device is inserted into the audio device while the audio device is inoperable and the data recorded on the recording medium during the playback state matches the identification data stored in the memory, the audio device is switched to the operable state and the signal recorded on the recording medium In the security device of the audio device capable of playing, Read-only memory (ROM) storing master data in the master recording medium; When an inconsistency between the data recorded on the recording medium and the identification data stored in the memory continuously occurs more than a predetermined number of times during the playback state, to switch the audio device from the inoperable state to the operable state and recorded on the recording medium during the playback state. Inoperation release which disables the use of a recording medium having data recorded in accordance with the identification data to switch the audio device from an inoperable state to an operable state only when the data matches the master data stored in the read-only memory. Control Panel, Security device of an audio device, characterized in that consisting of. When the recording device is inserted into the audio device while the audio device is inoperable and the data recorded on the recording medium in the playback state matches the identification data stored in the memory, the audio device is switched to the operable state, and the signal recorded on the recording medium In the security device of the audio device capable of playing, Mode switching means for switching a mode of the security device to an identification medium erasing mode in which identification data stored in a memory is erased; Identification data for erasing identification data stored in the memory when a recording medium having recorded data that matches the identification data stored in the memory is in the playback state and the mode of the security device is switched to the identification medium erasing mode by the mode switching means. Erasing means; Security device of an audio device, characterized in that consisting of. 3. The method according to claim 2, wherein said second mode switching means includes a plurality of switches, and setting a mode of a security device to said identification medium setting mode is performed by simultaneously pressing at least one switch of said plurality of switches in combination. Security device of an audio device, characterized in that the.