JPH04205965A - Security method for audio equipment - Google Patents

Abstract

PURPOSE:To start an audio equipment in sure security and with a simple operation by starting the audio equipment when a specified recording medium is loaded at the time of starting the audio equipment. CONSTITUTION:The recorded content of the recording medium 1 is compared with the content stored in a memory 3 provided in the audio equipment, and the audio equipment is started when the compared result is appropriate. Since it is unnecessary to manually input a password code in the case of releasing an action for security, the action for security is easily released. Then, the action for security is not released when the specified recording medium 1 does not exist, so that the performance of security is improved.

Description

[Detailed Description of the Invention] [Summary] Regarding a security method for preventing theft of audio equipment, security is ensured by enabling the audio equipment to start when a specific recording medium is inserted when the audio equipment is started. At the same time, it is possible to start up audio equipment with a simple operation.

[Industrial application field]

The present invention relates to a security method for preventing theft of audio equipment, particularly audio equipment for vehicle use.

[Conventional technology]

Audio devices, especially in-vehicle audio devices intended for export, are susceptible to theft, so a theft prevention method using a password code is adopted as a measure to prevent device theft. In this anti-theft method, the purchaser of the audio equipment manually enters a specific PIN code stored in the memory using the numerical keys of the device, and the device verifies this PIN code and if it is correct, the device starts up. It is ready for use.

In other words, the conventional security method for in-vehicle audio equipment is to manually enter a several-digit user PIN code using various numeric keys on the front panel of the device, and then verify the PIN code on the device side. If correct, the device will start.

Furthermore, when audio equipment is stolen from a car, the equipment is first removed from the car and then reattached to another car. That is, once the device is removed from the battery,
Then it is connected to the battery again. Changes in the connection state of this battery, that is, changes in the connection state of this battery, are detected by fluctuations in the power supply, and when this state is detected, the security method described above is executed to prevent the device from starting unless the correct pin code is entered. ing. Therefore, even if the device is removed from the car, only the user of the device who knows the password will be able to start the device. Theft is prevented by displaying on the vehicle or device that the device has such a function, that is, displaying a message such as ``There is no point in taking it away.''

[Problem to be solved by the invention]

However, not all types of audio equipment are equipped with a large number of numeric keys, and in this case, the number of types of password codes is reduced, resulting in a decline in security performance. Another possible method is to input the PIN code using keys other than numeric keys, but this would complicate the operation and make it difficult for the user to memorize the PIN code since it is not a number.

SUMMARY OF THE INVENTION An object of the present invention is to provide a security method that allows a user to easily cancel a security operation in an audio device without causing a decrease in security performance.

[Means to solve the problem]

The present invention is an audio security method for reproducing audio recorded on a recording medium, in which information recorded on the recording medium is compared with information stored in a memory provided in an audio device, and the comparison result is The present invention is characterized in that the audio equipment can be activated in response to the request.

[For production]

The content recorded on the recording medium is compared with the content stored in the memory provided in the audio device, and if the comparison result is appropriate, the audio device can be started, so the specific recording medium is the key to starting the audio device. This makes it possible to reliably prevent audio equipment from being stolen, and to simplify its operation.

〔Example〕

Hereinafter, the present invention will be explained in detail using the drawings.

In this embodiment, a digital audio disc player called a compact disc player will be described as an example, but the present invention can also be applied to tape players, digital audio disc players, and the like.

FIG. 3 is an explanatory diagram of the recording format of a compact disc.

As shown, the compact disc has lead-in area 3.
1, a data area 32, and a lead-out area 33. The lead-in area 31 has a TOC (
An area called a table of contents), a start address and an end address specified by the actual performance time of a song, individual performance time, performance time of all songs, total number of songs, etc. are stored.

In the security method of this embodiment, the user selects a specific compact disc, writes the contents recorded in the lead-in area 31 to the memory of the audio device, such as a rewritable ROM (E2FROM), Contents and attached compact disc glue
The contents of the input area 31 are compared, and when they match, the audio device can be activated. In addition, writing to the ROM is done using a ROM writer at a store, etc., and after writing, it is attached to the audio equipment, or the ROM writer is built into the reserved audio equipment, and the lead-in of the installed compact disc is performed by a specific operation. The contents recorded in the area 31 may be written to the ROM. Furthermore, instead of a commercially available compact disc, a security-specific disc may be provided to the user at a store, and a ROM corresponding to the disc may be installed in the audio equipment.

FIG. 1 is a configuration diagram of an audio device showing an embodiment of the present invention, in which a Cable device reads information from a compact disc 1, reproduces audio signals, and reads lead-in information.
D player 2, an amplifier 5 that amplifies the audio signal from the CD player 2 and outputs it from a speaker, and the CD player 2.
and a microprocessor 4 that controls the amplifier 5, and a 62FRO that stores information for canceling the security operation.
The microprocessor 4 is connected directly to the battery via the ignition switch IG-3W and monitors the connection state with the battery.

FIG. 2 is a flowchart illustrating the operation of the microprocessor 4, which operates when the audio device is once removed from the battery and then connected to the battery again.

When the power switch is turned on or when the ignition switch rc-sw is connected, the power is turned on to the compact disc player 2 by turning on the ignition switch IG-3W, and the compact disc player 2 becomes operable. (Step 1). Note that in this state, the amplifier 5 is not operating and no audio is reproduced. Next, the loaded compact disc l is played back (step 2), and lead-in information is read (step 3). Then, the read lead-in information and E
Compare the information stored in 2FROM 3 Step 4
), if they match, the audio device is ready for operation.
That is, in this embodiment, the amplifier 5 is operated so that music or the like is reproduced from the speaker (step 5). Conversely, if the lead-in information and the information stored in the 82FROM3 do not match, the playback is stopped (step 6) and the compact disc is ejected (step 7).

〔Effect of the invention〕

As described in detail above, according to the present invention, it is not necessary to manually input a PIN code to cancel the security operation, so the security operation can be easily canceled, and there is no need to memorize the PIN code. This eliminates the problem of not being able to cancel the security operation because the user forgets to do so.

Furthermore, since the security operation cannot be canceled without a specific recording medium, security performance is improved.

Note that it is also possible to further improve the performance of security and IJ tea by using the method of the present invention and the method of manually inputting the PIN code.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an audio device showing an embodiment of the present invention, FIG. 2 is a flowchart explaining the operation of the microprocessor 4, and FIG. 3 is an explanatory diagram of the recording format of a compact disc. (Explanation of symbols) 1...Compact disc, 2...Compact disc player, 3...ε2R
O! ,l. 4...Microprocessor, 5...Amplifier.

Claims (1)

[Claims] 1. An audio security method for reproducing audio recorded on a recording medium, which compares information recorded on the recording medium with information stored in a memory provided in an audio device. A security method for an audio device, characterized in that the audio device can be activated depending on the comparison result. 2. The audio equipment security method according to claim 1, wherein the recording medium has specific information indicating that the recording medium is the own equipment. 3. The recording medium is a digital audio disc on which an audio signal is recorded, and the information of the specific audio disc is recorded in the memory, and the information recorded in the memory is combined with the information when the audio device is started up. 2. The security method for audio equipment according to claim 1, further comprising the step of comparing the information of the digital audio discs and enabling the audio equipment to be activated in accordance with the comparison result.