JPH1021636A - Information recording medium and information reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the selling of an illegal copy of information recording medium by providing in advance a nearly planar LC resonance circuit on the normal recording medium. SOLUTION: When a video cassette tape 10 is inserted into a video deck 1 from the cassette inlet/outlet port 2 of the deck 1, an LC resonance circuit 20 provided on the case 11 of the tape 10 is resonated by a radio wave transmitted from a transmitting-receiving section 3 and a resonant wave is generated. When the resonant wave is not received by means of the section 3, a control section 4 discriminates the tape 10 as a copy and ejects the tape 10 as it is from the port 2. When the resonant wave from the surface of the case 11 is received by means of the section 3, the frequency of the resonant wave is analyzed. When it is confirmed that the frequency coincides with one reference frequency as a result of comparison, the control section 4 discriminates the tape 10 as a proper product and instructs an information reproducing section 5 to make normal reproducing operations.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video cassette tape, a digital video disk (DVD), a laser disk (L
D), cassette tapes recording software such as music, compact discs (CD), mini discs (M
D), a digital audio tape (DAT), an information recording medium such as a floppy disk on which software for computer control and the like is recorded, a credit card, and an information reproducing apparatus.

[0002]

2. Description of the Related Art In recent years, information reproducing apparatuses (video decks, etc.) of various recording systems have become widespread in homes. You can watch movies at home without having to go to movie theaters just by purchasing information recording media (such as video cassette tapes).
In many cases, ornamental information recording media are illegally copied and sold without the permission of the information distributor, and it is essential to take countermeasures against such copied products.

As shown in FIG. 9, a conventional ornamental video cassette tape 100 has a magnetic tape 103 in which video information such as a movie is magnetically recorded in a case 102 in which a label 101 is affixed to the center of the surface. This magnetic tape 103
And a erasure prevention unit such as a hole 105 is provided at a predetermined position on the side of the case 102.

[0004] This ornamental video cassette tape 100
Is inserted into a VCR connected to a television in the home, and when the viewer presses a play button on the VCR, the video information on the magnetic tape 103 of the video cassette tape 100 is reproduced, and the movie is displayed on the television. It is projected and viewers can watch the movie.

[0005] Normally, the VCR has not only a playback function but also a recording function, so that the viewer does not accidentally press the recording button and erase the contents of the video cassette tape 100 for viewing. , A hole 105 is detected by the detection mechanism, and when the hole 105 is detected by the detection mechanism, new information is prevented from being overwritten on the magnetic tape 103 of the video cassette tape 100 in the VCR. ing.

[0006] By the way, some of those who have a video deck have malicious intentions, and purchase one ornamental video cassette tape and a large amount of raw cassette tapes, and convert the contents of the ornamental video cassette tape to a raw cassette. Others are dubbing (duplicating) tapes to sell and make large profits without the permission of the distributor. Since the raw cassette tape is provided with a claw or the like in front of the hole 104, recording on the magnetic tape 103 is possible.

Therefore, in order to prevent the above-mentioned misconduct,
For example, in DAT and the like, measures are taken to prevent the recorded content from being copied by software. However, since this measure only protects the copy control by software, the protection may be removed. Software copy protection is far from perfect.

[0008]

As described above, in the structure of a conventional video cassette tape, that is, an information recording medium, although an erasure preventing section is provided, this is for preventing overwriting on itself. You cannot prevent dubbing the software recorded on yourself,
There is a problem that a malicious person can easily make a copy from the original software simply by purchasing a raw cassette tape, and there is no end to illegal copying and sales of information recording media recording ornamental software. Was.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and provides an information recording medium and an information reproducing apparatus capable of preventing unauthorized duplication and sale of an information recording medium on which software is recorded. It is an object.

[0010]

According to a first aspect of the present invention, there is provided an information recording medium, comprising: a housing accommodating a recording medium; and a substantially planar inductance provided in the housing. And an LC resonance circuit connected to a substantially planar capacitance.

An information recording medium according to a second aspect of the present invention is provided on a plate-shaped recording medium and a plate-shaped surface of the recording medium,
It is characterized by comprising an LC resonance circuit in which a substantially planar inductance and a substantially planar capacitance are connected.

According to a third aspect of the present invention, in the information reproducing apparatus for reproducing information recorded on the information recording medium, means for transmitting a radio wave of a predetermined frequency toward the information recording medium; Means for receiving a reflected wave or a passing wave from an information recording medium, determining means for determining whether or not the information recording medium is genuine according to the received reflected or passing wave, and determination by the determining means As a result, if the information recording medium is a genuine product, information reproducing means for reproducing information on the information recording medium is provided.

In the case of the present invention, an information recording medium on which information has been recorded or a housing accommodating the information recording medium is provided with an LC resonance circuit connecting a substantially planar inductance and a substantially planar capacitance, A radio wave of a predetermined frequency is transmitted from the information reproducing device, and when the information recording medium is inserted into the information reproducing device, the LC receiving the transmitted radio wave
A reflected wave or a passing wave from the resonance circuit is received by the receiving means. Then, the authenticity of the information recording medium, that is, whether the information recording medium is a genuine product or a duplicate product, is determined according to the frequency of the received reflected wave or passing wave.

Here, if the information recording medium is a copy of a commercially available raw tape or raw disk, a reflected wave or a passing wave from the LC resonance circuit is not received, and the information reproducing device does not receive the information of the copied product. Does not play.

That is, the information reproducing apparatus reproduces the information of the information recording medium only when the reflected wave or the passing wave is received. Therefore, only the information of the genuine product on which the original software is recorded is reproduced, and the information of the duplicate product is reproduced. Disappears.

[0016] As a result, since a movie or music cannot be watched in a duplicate product which has been illegally copied from the original software, no one buys it, and the sale of the duplicate software product can be prevented.

Since the inductance and capacitance of the LC resonance circuit are simply formed by combining the wiring patterns, the information recording medium can be manufactured without increasing the cost of the information recording medium itself, and the overall cost can be suppressed.

The inductance is provided by forming a wiring pattern, for example, a thin metal conductor such as aluminum or copper in a spiral shape on the housing or the information recording medium itself, and the capacitance is obtained by laminating the metal conductors via an insulating layer. It is formed and provided. An LC resonance circuit is formed by connecting metal conductors of inductance and capacitance to each other, and the LC resonance circuit is formed to be extremely thin. The length of the spirally formed metal conductor for obtaining the inductance is changed depending on the set resonance frequency (MHz band). As the resonance frequency,
For example, it is preferable to use the information in the range of about 3 to 55 MHz by subdividing it by information distribution company or genre of information source. In the case of a tape-shaped information recording medium, since the information recording medium itself is housed in the housing, the metal conductor is embedded in the front surface, the back surface, or the inside of the housing wall, for example, when the housing is molded, or when the housing is formed by sputtering. It is preferable to provide such that it is not peeled off from the information recording medium again. Also, if a cutout (punched product) of a metal foil is attached to a casing together with a perforated label, the metal foil is torn from the perforation when peeled off, making it impossible to reuse the resonance circuit.

[0019]

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

FIG. 1 is a diagram showing a configuration of a video deck as one embodiment of an information reproducing apparatus according to the present invention, FIG. 2 is a side view of the video deck of FIG. 1, and FIG. 3 is adapted to the video deck of FIG. FIG. 4 is an enlarged view showing an essential part of a case surface of a video cassette tape to be used. FIG. 4 is a diagram showing another example of an LC resonance circuit provided on the case surface.

In FIGS. 1 and 2, reference numeral 1 denotes a video deck. The video deck 1 has a video cassette tape entrance 2 into which a video cassette tape 10 as an information recording medium is inserted (hereinafter, referred to as a cassette entrance 2).
A radio wave of a predetermined frequency is transmitted to the video cassette tape 10 inserted into the cassette entrance 2, and the LC resonance circuit provided on the video cassette tape 10 resonates, such as a reflected wave or a passing wave. The transmitting and receiving unit 3 for receiving the wave and the frequency of the resonance wave received by the transmitting and receiving unit 3 are analyzed to determine whether the video cassette tape 10 is a genuine product (true) or a duplicate product (false) according to the frequency analysis result. The control unit 4 discriminates and executes or cancels the subsequent information reproducing process, and reproduces the information of the video cassette tape 10 inserted from the card entrance 2 under the control of the control unit 4 and outputs the information to an external device such as a television. An information reproducing unit 5 is provided. The information reproducing unit 5 is provided with a general video cassette tape 10 loading mechanism, an information reading mechanism, and the like. Note that the video deck 1 may include a recording mechanism.

The video cassette tape 10 includes a resin housing (hereinafter referred to as a case) 11, a magnetic tape 12 as a recording medium housed in the case 11, a feed mechanism 13 for the magnetic tape 12, An erasure preventing hole 14 provided at a predetermined position on the side of the case 11;
And the LC resonance circuit 20 provided on the surface of the. The recording / reproducing method of the video cassette tape 10 includes VHS method, S-VHS method, 8 mm method, H
Although there is an I8 system, any system may be used as long as it matches the system on the VCR 1 side.

As shown in FIG. 3, the case 11 itself is formed of, for example, a plastic resin. A concave step of about 10 to 40 μm is formed in a part of the surface of the case 11, and an LC resonance circuit 20 is provided so as to be embedded in the step. The LC resonance circuit 20 includes, for example, a wiring pattern 22 formed in a concave portion on the surface of the case 11 in a rectangular spiral shape (coil shape) and in a substantially planar shape.
(Metal conductor), wiring patterns 22a and 23b (metal conductors) to which both ends of the wiring pattern 22 are connected to form a capacitance (capacitance) component, and an insulating layer 21 such as an adhesive for bonding these.

These wiring patterns 22, 23a, 23b
On the insulating layer 21, a label 30 is provided with a wiring pattern 22, 23 so as to cover a concave step on the surface of the case 11.
a and 23b are integrally attached. Label 30
Is a thin insulating material such as paper or plastic film, on which a movie title or the like is printed. Also, the label 30 has the wiring patterns 22, 23a, 23b.
Also serves as insulation from the outside. The label 30 is provided with a plurality of perforations, and when the label 30 is to be peeled off, the wiring patterns 22, 23 are cut from the perforations.
a, and 23b.

As a method of providing the LC resonance circuit 20 in the case 11, as shown in FIG. 4, the wiring patterns 22, 23 are formed on the flat case 11 without making the surface of the case 11 concave.
a, 23b may be formed, and a label 30 may be attached so as to cover them.

The wiring pattern 22 has a predetermined width, for example, 1 mm.
It is formed in a spiral shape with a width of about 2 mm and a predetermined length, and has an inductance component. Also, the wiring pattern 23
a, 23b are formed in a laminated state at the center of the spiral wiring pattern 22, and
Capacitance components (capacitances) are generated depending on how the gaps a and 23b are formed. These wiring patterns 23a,
One end of 3b and both ends of the wiring pattern 22 are connected to form an LC resonance circuit 20 that resonates with a radio wave of a predetermined frequency. Other ways to create a capacitance component include:
The wiring pattern 23 is provided outside the spiral wiring pattern 22.
a, 23b may be laminated. These wiring patterns 22, 23a and 23b are made of, for example, aluminum,
It is formed using copper, another metal conductor, or the like.

As shown in FIG. 5, the transmission / reception section 3 includes an antenna section 31 composed of a wiring pattern resonating with an external LC resonance circuit, an amplification & sensitivity adjustment section 32, a noise filter 33, a power supply 34, and the like. When resonance occurs between the external LC resonance circuit and the antenna section 31, the voltage (current) at both ends of the circuit is rapidly reduced. The antenna unit 31 emits a radio wave of, for example, about 5 MHz from itself, and resonates when an external predetermined LC resonance circuit 20 approaches. The amplification & sensitivity adjustment unit 32 amplifies the transmitted radio wave and adjusts the reception sensitivity.
The noise filter 33 is for outputting only a predetermined frequency from the received radio wave. The power supply 34 is a DC power supply.

Hereinafter, the operation of the video deck will be described.

In the case of this video deck, a radio wave of a predetermined frequency is transmitted from the transmission / reception unit 3 with a weak output. This weak radio wave has an output of, for example, about several mw, and has a radio wave reach of about 5 cm to 10 cm, that is, the VCR 1
This almost covers the vicinity of the cassette entrance 2.

When the video cassette tape 10 is inserted from the cassette entrance 2 of the video deck 1,
The LC resonance circuit 20 provided on the case 11 of the video cassette tape 10 resonates with a radio wave transmitted from the transmission / reception unit 3, and a resonance wave (a reflected wave or a passing wave) is generated.

If the resonance wave is not received by the transmission / reception unit 3, the control unit 4 determines that the video cassette tape 10 inserted into the cassette entrance 2 is not an original, that is, a duplicate product, and discharges the video cassette tape 10 from the cassette entrance 2 as it is. I do.

On the other hand, when a resonance wave from the surface of the case 11 of the video cassette tape 10 is received by the transmission / reception unit 3, the reception wave is transferred from the transmission / reception unit 3 to the control unit 4, and the frequency of the reception wave is analyzed. You.

A plurality of reference frequencies are set in the control unit 4 in advance for each genre of information source and for each software distribution company, and the control unit 4 compares these reference frequencies with the analyzed frequencies.

When the comparison result indicates that the reference frequency matches any one of the reference frequencies, the control unit 4 determines for the first time that the video cassette tape 10 is a genuine product, that is, the original software is recorded, and the information reproducing unit 5 Instruct the normal playback operation. If the reference frequency does not correspond to any of the reference frequencies, the control unit 4 determines that the product is a duplicated product, and the video cassette tape 10
To discharge.

As described above, in addition to receiving the resonance wave,
Since the frequency is also checked to determine whether or not the product is a genuine product, it is possible to exclude a product obtained by simply duplicating the LC resonance circuit.

As a result, only the genuine video cassette tape 10 becomes a target of information reproduction, and software recorded on the magnetic tape 12 in the cassette, for example, a movie, is reproduced by the information reproduction section 5. The user can watch and listen to the original software video on the television connected to the VCR 1.

As described above, according to this video deck, when the video cassette tape 10 is inserted into the cassette entrance 2, the resonance wave of the radio wave transmitted from the transmission / reception unit 3 is received by the transmission / reception unit 3 from the video cassette tape 10. Only when the control unit 4 instructs the information reproducing unit 5 to reproduce information, the case 11 of the video cassette tape 10 is not provided with the LC resonance circuit 20 that resonates at a predetermined frequency. Information will not be reproduced.

As a result, the use value of the illegally created duplicate product is lost, and as a result, the production and sale of the duplicate product can be prevented.

Further, on the video cassette tape 10, the substantially planar LC resonance circuit 20 composed of the wiring patterns 22, 23a, and 23b is simply adhered to the case 11 together with the label 30 so that the LC resonance circuit 20 is not peeled off. Therefore, the mass production of the video cassette tape 10 can be performed while keeping the cost low, and the convenience of the video cassette tape 10 is not impaired. Further, since the cut is made in the label 30, even if the label 30 is peeled off, the LC resonance circuit 20 is cut off from the cut together with the label 30, so that the LC resonance circuit 20 is not reused.
The case 11 may be provided with the LC resonance circuit 20 by a processing method such as an embedding process, a vapor deposition process, and a transfer process.

In the above embodiment, the LC resonance circuit 20
Although the wiring pattern 22 that generates the inductance component is formed in a substantially rectangular spiral shape, the present invention is not limited to this embodiment.

For example, as shown in FIG.
2 may be triangular, and as shown in FIG. 7, the wiring pattern 22 may be circular. Further, the wiring pattern 22 may be a hexagon, an octagon, an ellipse, a rectangle, or the like. The wiring pattern 22 is not limited to the entire shape as long as an inductance component can be generated.

In the above embodiment, one LC resonance circuit 20 is formed in the case 11 of the video cassette tape 10. However, a plurality of spiral wiring patterns may be provided in a plurality of rows. The number of the resonance circuits 20 is not limited to the number. Further, the LC resonance circuit 20 may be embedded not only in the front surface of the case 11 but also in the case 11 or may be provided on the back surface of the case 11. 1
What is necessary is just to provide so that it may not be exfoliated from 1.

Further, in the above-described embodiment, the double discrimination between the reception of the resonance wave from the LC resonance circuit 20 and the analysis of the frequency of the resonance wave for discriminating whether or not the video cassette tape 10 is genuine is performed. Although the operation is performed, it may be sufficient to determine that the LC resonance circuit 20 is a genuine product by receiving the resonance wave, and further detect the position and thickness of the LC resonance circuit 20 on the surface of the case 11 and the smoothness of the surface of the case 11. As a result, the exclusion accuracy can be further increased.

Next, a digital video disk (hereinafter referred to as a DVD device) as an example to which the present invention is applied will be described with reference to FIG. FIG. 7 is a plan view of the DVD. As shown in FIG. 8, the base material of this DVD is 1.2 m thick.
The resin plate 50 is a circular resin plate 50 having a thickness of about m. The resin plate 50 is a single resin plate such as polycarbonate or a laminate of two 0.6 mm thick resin plates. An inner hole 51 for rotation support is 15 mm in diameter at the center of this DVD.
The degree is provided. A data recording area 52 extends from 50 mm to 116 mm from the center of both sides of the DVD.

In this DVD, an area 53 from the inner hole 51 to the data recording area 52 is an area in which no data is recorded. In this area 53, a spiral wiring pattern 54 (for generating inductance) and this wiring pattern An LC resonance circuit formed by forming wiring patterns 55a and 55b (for generating capacitance) having a laminated structure so as to draw a semicircle outside of and connecting them to each other is integrally attached to a label.

That is, in this DVD, the circular resin plate 50 having the inner hole 51 itself functions as an information recording medium. In this application example, an LC resonance circuit is provided directly on an information recording medium without a case. This is an example. Since information is recorded on only one side of a CD or the like, an LC resonance circuit may be attached together with a label at a desired position on the upper surface of the disk.

A DVD player as an information reproducing apparatus transmits a radio wave of a predetermined frequency to a DVD insertion slot and a DVD inserted from the DVD insertion slot,
A transmission / reception unit for receiving a resonance wave from the VD, a control unit for analyzing the resonance wave received by the transmission / reception unit, and an information reproduction unit for DVD reproduction controlled by the control unit are provided.
In the case of the DVD of this application example, the DVD of the DVD player
If a resonance wave is not received from the LC resonance circuit when the DVD is inserted into the insertion slot, the DVD is ejected, and only when the resonance wave is received, the information reproducing unit reproduces the information of the DVD.

According to the DVD of this application example, a substantially planar LC resonance circuit formed by a combination of the wiring patterns 54, 55a and 55b is provided directly on the surface of the DVD itself, and a transmitting / receiving unit is provided on the DVD player side. By judging whether or not a resonance wave can be received at the time of reproducing a DVD, it is possible to prevent reproduction of information of a duplicate product.

In the above embodiment, the present invention has been described by taking a VCR as an information reproducing apparatus, a video cassette tape, a digital video disk (DVD), etc. as an information recording medium. Laser disc (LD), cassette tape, compact disc (CD), mini disc (MD), digital audio tape (DAT), floppy disc,
It can be applied to cash cards and the like. In this case, the information reproducing apparatus corresponding to each recording / reproducing method may be provided with the transmitting / receiving section, the control section, the information reproducing section, and the like.

[0050]

As described above, according to the present invention, a regular information recording medium is provided with a substantially planar LC resonance circuit, and a signal is transmitted when the information recording medium is inserted into the information reproducing apparatus. Since the information is reproduced from the information recording medium only after the LC resonance circuit receives the resonance wave that resonates with the transmitted radio wave, the information of the duplicated product without the LC resonance circuit provided on the information recording medium is not reproduced, and the duplicated product is not reproduced. As a result, the sale of the duplicated product can be prevented.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a configuration of a video deck according to one embodiment of the present invention.

FIG. 2 is a sectional view of the video deck of FIG.

FIG. 3 is an enlarged view showing a main part of a case surface of the video cassette tape.

FIG. 4 is a diagram showing another example of an LC resonance circuit provided on a case surface.

FIG. 5 is a diagram showing a configuration of a transmission / reception unit of the video deck of FIG. 1;

FIG. 6 is a diagram showing a modification in which the LC resonance circuit is formed into a triangular spiral.

FIG. 7 is a diagram showing a modification in which the LC resonance circuit is formed into a circular spiral.

FIG. 8 is a plan view showing an example in which the present invention is applied to a digital video disk.

FIG. 9 is a diagram showing a conventional video cassette tape.

[Explanation of symbols]

1. VCR, 2: Video cassette tape entrance,
DESCRIPTION OF SYMBOLS 3 ... Transceiving part, 4 ... Control part, 5 ... Information reproducing part, 10 ... Video cassette tape, 11 ... Case, 12 ... Magnetic tape, 13 ... Sending mechanism part, 14 ... Hole, 20 ... LC resonance circuit, 22, 23a , 23b, 54, 55a, 55b ... wiring pattern, 30 ... label, 31 ... antenna part, 32 ...
Amplification & sensitivity adjustment unit, 33: noise filter, 34: power supply.

Claims (3)

[Claims] 1. An information recording medium comprising: a housing accommodating a recording medium; and an LC resonance circuit provided in the housing and connected to a substantially planar inductance and a substantially planar capacitance. 2. A recording medium comprising: a plate-shaped recording medium; and an LC resonance circuit provided on the plate-shaped surface of the recording medium and connected to a substantially planar inductance and a substantially planar capacitance. Information recording medium. 3. An information reproducing apparatus for reproducing information recorded on an information recording medium, comprising: means for transmitting a radio wave of a predetermined frequency toward the information recording medium; and a reflected wave or a passing wave from the information recording medium. Receiving means for determining whether or not the information recording medium is genuine according to the received reflected wave or passing wave; and a determination result by the determining means that the information recording medium is genuine. An information reproducing apparatus, comprising: an information reproducing unit that reproduces information on the information recording medium.