JP2004118930A - Disk-shaped recording medium and playback device therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disk-shaped recording medium whose authenticity can be quickly judged. <P>SOLUTION: This disk-shaped recording medium is constituted in such a manner that a noncontact IC chip 30 capable of transmitting second information necessary for reproducing first information recorded on the authentic disk-shaped recording medium is secured to the disk-shaped recording medium 10 itself (or to a case in which the disk-shaped recording medium is housed). <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disc-shaped recording medium and a reproducing apparatus thereof.
[0002]
[Prior art]
When the security information of the optical disk is changed for each optical disk, a CAV area corresponding to the security information is provided in the data area of the CD-ROM optical disk, and when the optical disk playback apparatus detects the security information of the optical disk, Japanese Patent Application Laid-Open No. 2004-151867 describes a technique for permitting reproduction of an optical disc.
[0003]
The linear velocity of the TOC information of the optical disc is changed for each optical disc, a CAV area corresponding to the linear velocity is provided in the data area of the optical disc, and the optical disc reproducing apparatus detects the linear velocity of the TOC information and records the corresponding CAV area. Japanese Patent Application Laid-Open No. 2004-151867 describes a technique for permitting reproduction of an optical disc when a CAV area exists when position information is generated and the recording position is searched.
[0004]
When copying the content recorded on an optical disk to another optical disk, it is not copied according to the disk standard, and when reading information from the optical disk, unique data that is always read according to the disk standard is recorded, and general information is not recorded A first key area and a second key area that cannot be accessed in accordance with the disk standard when accessing the optical disk during playback are provided, and the optical disk is not copied from another optical disk in the first key area. Is embedded in the second key area, and a second key code is embedded in the second key area to indicate that this optical disk is not copied from another optical disk. When the reproducing means reads the first and second key codes and at least one of them is not detected, the optical disc is read again. Technique is not performed is described in Patent Document 3.
[0005]
[Patent Document 1]
Japanese Patent Laid-Open No. 8-185659
[Patent Document 2]
Japanese Patent Laid-Open No. 8-124358
[Patent Document 3]
JP-A-9-128301
[Problems to be solved by the invention]
In each of the conventional techniques described above, it is determined whether or not the optical disc is authentic by reading the recording data of the optical disc by the optical head of the reproducing apparatus. There is a drawback of hanging.
[0009]
In view of this point, the present invention intends to propose a disc-shaped recording medium that can quickly determine whether or not the disc-shaped recording medium is authentic.
[0010]
Further, the present invention can quickly determine whether or not the loaded disc-shaped recording medium is authentic, and when it is determined that the disc-shaped recording medium is not authentic, It is an object of the present invention to propose a reproducing apparatus for a disk-shaped recording medium that does not reproduce information recorded on the disk-shaped recording medium.
[0011]
[Means for Solving the Problems]
In the first invention, the non-contact IC chip capable of transmitting the second information necessary for reproducing the first information recorded on the genuine disc-shaped recording medium is the disc-shaped recording medium itself or the disc. It is a disk-shaped recording medium that is fixed to a case in which the recording medium is stored.
[0012]
A second invention is a disk-shaped recording medium according to the first invention, wherein the non-contact IC chip is a wireless tag that transmits the second information when power is supplied from outside by microwaves. It is.
[0013]
According to a third invention, in the first or second invention, the second information is identification information unique to the disk-shaped recording medium, and the first information is information that can be reproduced using the identification information as a key. It is a recording medium.
[0014]
A fourth invention has a spindle on which the disk-shaped recording medium according to any one of the first to third inventions is loaded, a driving means for driving the disk-shaped recording medium to rotate through the spindle, and a drive During the rotation of the disk-shaped recording medium by the means, the first reading means for reading the first information recorded on the disk-shaped recording medium and the disk-shaped recording medium itself or the disk-shaped recording medium are accommodated. A second reading means for reading the second information from the non-contact IC chip fixed to the case without contact, and a second reading means for reading the first information read from the first reading means from the second reading means. And a reproducing means for enabling reproduction based on the information of the disc-shaped recording medium.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an example of a reproducing apparatus for a disk-shaped recording medium according to an embodiment of the present invention will be described in detail with reference to FIG. Reference numeral 10 denotes a CD-ROM which is an example of a disk-shaped recording medium. A non-contact IC chip (wireless tag) 30 is fixed (attached) to the label surface of the CD-ROM 10. Even on the recording surface of the CD-ROM 10, the non-contact IC chip 30 may be fixed to the innermost periphery or the outermost periphery where no data is recorded. When the disc-shaped recording medium is stored in the case, the non-contact IC chip 30 is fixed (attached) to the front surface, back surface, or side surface on the outer peripheral surface of the case.
[0016]
The non-contact IC chip 30 has second information (identification information as a key) necessary for reproducing the first information (video data, audio data, program data, etc.) recorded on the genuine CD-ROM 10. It is comprised so that it can transmit.
[0017]
This second information is identification information unique to each CD-ROM 10, and the first information is information that can be reproduced using this identification information as a key. The second information can be information common to a plurality of CD-ROMs.
[0018]
Reference numeral 32 denotes a detection device. When the CD-ROM 10 is mounted on the spindle 12, the non-contact IC chip 30 is accessed in a non-contact manner, and second information indicating that the CD-ROM 10 is a genuine CD-ROM is obtained. Can be received.
[0019]
The CD-ROM 10 is rotationally driven by a spindle motor 14 via a spindle 12. The spindle motor 14 is controlled by a motor control circuit 20.
[0020]
Reference numeral 16 denotes an optical head (optical pickup) which reproduces recorded data on the CD-ROM 10. The recording data reproduced by the optical head 16, that is, the reproduction data and the clock are amplified by the RF amplifier 22, and then supplied to a CD DSP (Digital Signal Processor) 24. The reproduction data from the CD DSP 24 is decoded by a CD-ROM decoder 26 and supplied to an image monitor (not shown).
[0021]
Reference numeral 18 denotes a threading motor for moving the optical head 16 in the radial direction of the CD-ROM 10, and this motor 18 is also controlled by the motor control circuit 20. The motor control circuit 20 is controlled by the CD DSP 24.
[0022]
A control microcomputer 28 controls the CD DSP 24, the CD-ROM decoder 26, and the like.
[0023]
With reference to the block diagram in FIG. 1 and the flowchart in FIG. 2, the determination as to whether or not the CD-ROM 10 loaded in the playback device is a genuine CD-ROM will be described.
[0024]
The CD-ROM 10 is loaded into the playback device (step S1) and mounted on the spindle 12.
[0025]
Whether the detection device 32 has accessed the non-contact IC chip 30 in a non-contact manner and has received from the non-contact IC chip 30 the second information indicating that the CD-ROM 10 is a genuine CD-ROM. It discriminate | determines (step S12).
[0026]
If YES in step S12, the process proceeds to step S14, where the second information received by the detection device 32 is supplied to the control microcomputer 28, and the control microcomputer 28 permits reproduction of the CD-ROM 10. Then, using the second information as a key, each part of the playback device is controlled so that the recorded data (first information) is played back from the CD-ROM 10.
[0027]
If the determination in step S12 is NO, the process proceeds to step S16, and the detection device 32 displays information indicating that the CD-ROM 10 has not received information indicating that it is a genuine CD-ROM as a control microcomputer. The control microcomputer 28 disables the reproduction of the recording data (first information) from the CD-ROM 10 and controls each part of the reproducing apparatus so that the recording data is not reproduced.
[0028]
Next, operations of the non-contact IC chip 30 and the detection device 32 will be described with reference to FIG. The detection device 32 includes an antenna 32A and a reading device 32B connected to the antenna 32A. The antenna 32 </ b> A irradiates the non-contact IC chip 30 with microwaves based on a control signal from the reading device 32 </ b> B and supplies power to the non-contact IC chip 30.
[0029]
Next, a specific configuration example of the non-contact IC chip 30 (see Japanese Patent Application Laid-Open No. 2000-293656) will be described with reference to FIG. Reference numeral 30A denotes a semiconductor base constituting the IC chip. The semiconductor base 30A is a fine one that can be sandwiched or sandwiched in a flexible material such as paper together with an antenna 30F described later.
[0030]
Reference numeral 30B denotes a CPU unit which executes processing according to a program stored in the memory unit 30C. The antenna / power supply circuit unit 30D performs detection and modulation / demodulation of microwaves, and supplies power to the IC chip based on reception of microwaves by the antenna 30F connected to the antenna / power supply circuit unit 30D. Then, the antenna / power supply circuit unit 30D uses the antenna 30F to read / write information using the microwaves in a non-contact manner with the reading device 32B. The CPU unit 30B, the memory unit 30C, and the antenna / power supply circuit unit 30D are formed on the semiconductor base 30A and are connected to each other by a bus 30E including a power supply path and a signal line formed on the semiconductor base 30A. Is done.
[0031]
Next, operations of the detection device 32 and the non-contact IC chip 30 will be described. The non-contact IC chip 30 receives the microwave transmitted from the antenna 32A of the detection device 32 by the antenna 30F, and converts the received microwave into a power supply voltage by the antenna / power supply circuit unit 30D. The CPU unit 30B is a genuine CD-ROM that is a CD-ROM 10 to which the non-contact IC chip 30 is fixed (or a CD-ROM housed in a case to which the non-contact IC chip 30 is fixed). Second information indicating the presence is generated. The second information is supplied to the antenna / power supply circuit unit 30D, modulates the microwave, and transmits the microwave modulated by the second information from the antenna 30F. The microwave modulated by the second information is received by the antenna 32A of the detection device 32. A signal received by the antenna 32A is supplied to the reader 32B. The reading device 32B demodulates the microwave modulated by the second information and reads the second information. This second information is supplied to the computer 34. This computer 34 corresponds to the control microcomputer 28 of the playback apparatus of FIG. 1, and in the playback apparatus of FIG. 1, second information (video data, audio data, program data, etc.) recorded on the CD-ROM 10 is recorded. Can be played.
[0032]
The second information in this case is identification information unique to the CD-ROM 10 loaded in the playback device (this identification information is also recorded on the CD-ROM 10 and the playback device matches the identification information). In this case, the first information is reproduced using the identification information as a key.
[0033]
In the above example, the case where the disk-shaped recording medium is a CD-ROM has been described. However, the present invention is not limited to this, and various disk-shaped recording media such as an optical disk, a magneto-optical disk, and a magnetic disk are possible. . These various disks may be either those stored in the case or not.
[0034]
【The invention's effect】
According to the first invention, the non-contact IC chip capable of transmitting the second information necessary for reproducing the first information recorded on the authentic disc-shaped recording medium is the disc-shaped recording medium itself, or Since the disc-shaped recording medium is fixed to the case in which the disc-shaped recording medium is housed, there is no need to reproduce the information recorded on the disc-shaped recording medium, and the second information transmitted from the non-contact IC chip is received. Thus, it is possible to obtain a disc-shaped recording medium that can quickly determine whether or not the disc-shaped recording medium is authentic.
[0035]
According to the second invention, in the disk-shaped recording medium of the first invention, the non-contact IC chip is a wireless tag that transmits the second information when power from the microwave is supplied from the outside. In addition to the effect of the first invention, there is no need to provide a power supply voltage generating means such as a battery in the non-contact IC chip, and a disc-shaped recording medium that can further reduce the size of the non-contact IC chip. Can be obtained.
[0036]
According to the third invention, in the first or second invention, the second information is identification information unique to the disc-shaped recording medium, and the first information is information that can be reproduced using the identification information as a key. Therefore, in addition to the effects of the first or second invention, it is possible to obtain a disc-shaped recording medium that can more reliably determine whether or not the disc-shaped recording medium is authentic.
[0037]
According to a fourth aspect of the present invention, there is provided a spindle on which the disk-shaped recording medium according to any one of the first to third aspects is loaded, and driving means for rotationally driving the disk-shaped recording medium via the spindle. The first reading means for reading the first information recorded on the disk-shaped recording medium and the disk-shaped recording medium itself or the disk-shaped recording medium while the disk-shaped recording medium is rotated by the driving means. Second reading means for reading the second information from the non-contact IC chip fixed to the accommodated case in a non-contact manner, and the first information read from the first reading means from the second reading means And a reproducing unit that enables reproduction based on the second information, so that it is possible to quickly determine whether or not the loaded disk-shaped recording medium is authentic, When the recording medium is determined not as genuine, it is possible to obtain a reproducing apparatus of the disc-shaped recording medium not to reproduce the information recorded on the disc-shaped recording medium.
[Brief description of the drawings]
FIG. 1 is a block diagram showing an example of a reproducing apparatus for a disk-shaped recording medium according to an embodiment of the present invention.
FIG. 2 is a flowchart showing the operation of the disc-shaped recording medium playback apparatus of FIG. 1;
3 is a block diagram showing a non-contact IC chip and a detection device in the reproducing apparatus for the disk-shaped recording medium in FIG. 1. FIG.
FIG. 4 is a block diagram showing a specific configuration of a non-contact IC chip.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... CD-ROM, 12 ... Spindle, 14 ... Spindle motor, 16 ... Optical head (pickup), 18 ... Threading motor, 20 ... Motor control circuit, 22 ... RF amplifier, 24 ... DSP for CD, 26 ... CD-ROM Decoder, 28 ... control microcomputer

Claims (4)

A non-contact IC chip capable of transmitting the second information necessary for reproducing the first information recorded on the genuine disc-shaped recording medium is stored in the disc-shaped recording medium itself or in the disc-shaped recording medium. A disc-shaped recording medium characterized by being fixed to a case. The disk-shaped recording medium according to claim 1, wherein the non-contact IC chip is a wireless tag that transmits the second information when electric power by microwaves is supplied from the outside. 3. The information according to claim 1, wherein the second information is identification information unique to the disc-shaped recording medium, and the first information is information that can be reproduced using the identification information as a key. Disc-shaped recording medium. Drive means for rotating the disk-shaped recording medium through the spindle, the spindle having the disk-shaped recording medium according to any one of claims 1 to 3 loaded thereon,
First reading means for reading first information recorded on the disk-shaped recording medium during rotation of the disk-shaped recording medium by the driving means;
A second reading means for reading the second information in a non-contact manner from the disc-shaped recording medium itself or the non-contact IC chip fixed to a case in which the disc-shaped recording medium is stored;
Reproduction means for enabling reproduction of the first information read from the first reading means based on the second information read from the second reading means;
An apparatus for reproducing a disc-shaped recording medium, comprising:

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