JP2000311436A - Reproducer - Google Patents

Reproducer

Info

Publication number
JP2000311436A
JP2000311436A JP11121252A JP12125299A JP2000311436A JP 2000311436 A JP2000311436 A JP 2000311436A JP 11121252 A JP11121252 A JP 11121252A JP 12125299 A JP12125299 A JP 12125299A JP 2000311436 A JP2000311436 A JP 2000311436A
Authority
JP
Japan
Prior art keywords
storage medium
medium
encryption method
processing circuit
reproduction
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP11121252A
Other languages
Japanese (ja)
Other versions
JP2000311436A5 (en
Inventor
Yukio Isobe
幸雄 磯部
将 ▲高▼橋
Susumu Takahashi
Toshifumi Takeuchi
敏文 竹内
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP11121252A priority Critical patent/JP2000311436A/en
Publication of JP2000311436A publication Critical patent/JP2000311436A/en
Publication of JP2000311436A5 publication Critical patent/JP2000311436A5/ja
Pending legal-status Critical Current

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  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Storage Device Security (AREA)
  • Television Signal Processing For Recording (AREA)

Abstract

PROBLEM TO BE SOLVED: To make the looking and listening of a storage medium which is illegally produced impossible and to make the reproducing and the looking and listening of a storage medium which is normally produced possible by discriminating which of storage media is a storage medium which is reproduced and detecting whether information which is recorded on storage media is ciphered by at least two kinds of cipher systems corresponding respectively to the media or not. SOLUTION: A storage medium identifying processing 20 directly detects the kind of a medium apart from medium identification information which is recorded on a storage medium 10. In a medium which is produced by an injection molding and on which information can not be directly recorded and a medium on which information can be directly recorded, reflectance of bits is respectively different by the kinds of the storage media. The storage medium identification data detected by the storage medium identifying processing 20 are transferred to a reproduction limiting processing 50 and video and sound signals which are recorded on the medium 10 and are main signals and whose bits are compressed are transferred to a reproduction signal processing 30 via the processing 20 and whether the system of the signals is a cipher system for storagable medium or not is detected by a cipher system detecting processing 40.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【発明の属する技術分野】本発明は著作権保護に関し、
正規に販売あるいは配布された蓄積媒体および正規に記
録された蓄積媒体は再生可能とし、違法に複製された媒
体は再生不可とする再生装置に関する。
TECHNICAL FIELD The present invention relates to copyright protection,
The present invention relates to a reproducing apparatus that makes it possible to reproduce a storage medium that has been legally sold or distributed and a storage medium that has been recorded legally, and that cannot reproduce a medium that has been illegally copied.

【従来の技術】ビデオディスク、ディジタルVTR、デ
ィジタル放送の受信装置などにより得られる高画質のビ
デオ信号に対する著作権保護を確実に行うようにしたビ
デオ信号処理装置や、ビデオ信号処理方法、記録媒体に
関する技術については、例えば、特開平1−17865
6号公報に記載されている。
2. Description of the Related Art A video signal processing apparatus, a video signal processing method, and a recording medium for ensuring copyright protection for a high-quality video signal obtained by a video disk, a digital VTR, a digital broadcast receiving apparatus, and the like. Regarding the technology, see, for example,
No. 6 is described.

【発明が解決しようとする課題】前記公報には世代管理
情報を用いた複製防止技術が示されている。しかし、違
法に作成された蓄積媒体の再生を不可とする技術にまで
は言及されていない。本発明の目的は、違法に作成され
た蓄積媒体については視聴できないようにし、正規に作
成され販売あるいは配布された蓄積媒体、あるいは正規
の方法に従い記録した蓄積媒体については再生し視聴す
ることのできる様にした技術を示し、これらの技術を用
いた再生装置を提供することである。
The above publication discloses a duplication prevention technique using generation management information. However, there is no mention of a technology that makes it impossible to reproduce an illegally created storage medium. An object of the present invention is to make it impossible to view a storage medium created illegally, and to reproduce and view a storage medium that is created, sold or distributed, or a storage medium recorded according to a regular method. An object of the present invention is to provide a reproducing apparatus using such techniques.

【課題を解決するための手段】本発明に関する蓄積媒体
の再生装置は、再生する蓄積媒体が少なくとも2種類の
蓄積媒体のうちのどの蓄積媒体であるかを識別する蓄積
媒体識別手段と、蓄積媒体に記録された情報が少なくと
も2種類の蓄積媒体のそれぞれに対応した少なくとも2
種類の暗号方式で暗号化されているかどうかを検出する
暗号方式検出手段と、暗号方式検出手段により検出され
た暗号方式が蓄積媒体識別手段により識別された蓄積媒
体の種類に対応した暗号方式と異なる場合に情報の再生
を停止する再生制限手段を有することを特徴とする。こ
れにより、違法に複製された蓄積媒体を検出した時には
視聴できないようにできる。さらに、本発明に関する蓄
積媒体の再生装置は、再生する蓄積媒体が記録可能な蓄
積媒体であるか記録不可能な蓄積媒体であるかを識別す
る蓄積媒体識別手段と、蓄積媒体に記録された情報が記
録可能な蓄積媒体に対応した暗号方式で暗号化されてい
るかどうかおよび記録不可能な蓄積媒体に対応した暗号
方式で暗号化されているかどうかを検出する暗号方式検
出手段と、蓄積媒体が記録可能な蓄積媒体であると識別
されて蓄積媒体に記録された情報が記録不可能な蓄積媒
体に対応した暗号方式で暗号化されていると検出された
場合と、蓄積媒体が記録不可能な蓄積媒体であると識別
されて蓄積媒体に記録された情報が記録可能な蓄積媒体
に対応した暗号方式で暗号化されていると検出された場
合に情報の再生を停止する再生制限手段を有することを
特徴とする。これにより、記録可能な蓄積媒体から記録
不可能な蓄積媒体へ、または記録不可能な蓄積媒体から
記録可能な蓄積媒体へ何らかの方法により違法に複製さ
れた蓄積媒体を検出した時には視聴できないようにでき
る。
According to the present invention, there is provided an apparatus for reproducing a storage medium, comprising: a storage medium identifying means for identifying which of the at least two types of storage medium the storage medium to be reproduced is; Is stored in at least two storage media corresponding to at least two types of storage media, respectively.
An encryption method detecting means for detecting whether or not encryption has been performed by the type of encryption method, and an encryption method detected by the encryption method detection means is different from an encryption method corresponding to the type of the storage medium identified by the storage medium identification means. It is characterized by having a reproduction restricting means for stopping reproduction of information in the case. This makes it impossible to view when the illegally duplicated storage medium is detected. Further, the storage medium reproducing apparatus according to the present invention includes a storage medium identification unit for identifying whether the storage medium to be reproduced is a recordable storage medium or a non-recordable storage medium, and information recorded on the storage medium. Encryption means for detecting whether the data is encrypted by an encryption method corresponding to a recordable storage medium and whether the data is encrypted by an encryption method corresponding to a non-recordable storage medium; If the information recorded on the storage medium is identified as a possible storage medium and it is detected that the information is encrypted by the encryption method corresponding to the storage medium that cannot be recorded, A reproduction restricting unit that stops reproduction of information when it is detected that the information recorded as a medium and recorded on the storage medium is encrypted by an encryption method corresponding to the recordable storage medium; It is characterized in. Thereby, when a storage medium illegally copied by a method from a recordable storage medium to a non-recordable storage medium or from a non-recordable storage medium to a recordable storage medium is illegally detected, the content cannot be viewed. .

【発明の実施の形態】以下、本発明の実施の形態につい
て図面を用いて詳細に説明する。図1は本発明に係る再
生装置の一実施例を示す図である。図1において、10
は蓄積媒体、20は蓄積媒体識別処理回路、30は再生
信号処理回路、40は暗号方式検出処理回路、50は再
生制限処理回路、60は出力端子である。図1に示す実
施例は一般の家庭で使用されるDVD−ROMドライブ
装置、DVD−RAMドライブ装置、またはDVD−R
OMとDVD−RAM両方ともに再生可能なドライブ装
置を想定したものである。蓄積媒体10は、例えばDV
D−ROMディスクのような記録不可能な蓄積媒体か、
あるいはDVDーRAMディスクのような記録可能な蓄
積媒体である。蓄積媒体識別処理回路20は、蓄積媒体
10に記録されている媒体識別情報とは別に物理的に媒
体の種類を直接検出する。射出成形により作成した直接
記録のできない媒体と直接記録のできる媒体では、情報
の1、0を示すビットの反射率が蓄積媒体の種類によっ
て各々異なったり、直接記録可能媒体では記録のための
トラッキングやアドレスのためにディスクにランドやグ
ルーブが作られていたり、ランドとグルーブの境界が変
調されていたり、あるいはアドレスの付け方が異なって
いたりするため物理的に媒体を識別することが可能であ
る。蓄積媒体識別処理回路20で検出された蓄積媒体識
別データは、再生制限処理回路50に転送される。ま
た、蓄積媒体10に記録されている主信号であるビット
圧縮された映像信号、音声信号は蓄積媒体識別処理回路
20を介して、再生信号処理回路30に転送される。再
生信号処理回路30は、蓄積媒体10に記録されている
主信号であるビット圧縮された映像信号、音声信号を再
生し、その再生データを暗号方式検出処理回路40と再
生制限処理回路50に転送する。蓄積媒体10が記録不
可能な蓄積媒体であれば、それに対応した蓄積不可能媒
体用暗号方式が、蓄積媒体10の暗号方式として適用さ
れている。また、蓄積媒体10が記録可能な蓄積媒体で
あれば、それに対応した蓄積可能媒体用暗号方式が、蓄
積媒体10の暗号方式として適用されている。例えば、
記録可能な蓄積媒体には複写コピー1回可能のような複
写世代管理がある暗号方式など、記録不可能な蓄積媒体
とは異なる暗号方式が適用される。暗号方式検出処理回
路40は、蓄積媒体10に記録されている主信号に含ま
れる暗号方式が、蓄積可能媒体用暗号方式であるか、蓄
積不可能媒体用暗号方式であるかを検出し、暗号方式検
出データとして、再生制限処理回路50に転送される。
再生制限処理回路50は、蓄積媒体識別処理回路20で
検出された蓄積媒体識別データと、暗号方式検出処理回
路40で検出された暗号方式検出データとを比較する。
図2に、この比較の判断基準を示す。もし、記録媒体識
別データが記録可能蓄積媒体で、暗号方式検出データが
記録不可能蓄積媒体用暗号方式ならば、それは何らかの
違法複製が行われた蓄積媒体と判断され、出力端子60
からの再生データの出力が停止される。もし、記録媒体
識別データが記録可能蓄積媒体で、暗号方式検出データ
が記録可能蓄積媒体用暗号方式ならば、それは違法複製
が行われた蓄積媒体と判断されず、正常に出力端子60
から再生データが出力される。もし、記録媒体識別デー
タが記録不可能蓄積媒体で、暗号方式検出データが記録
不可能蓄積媒体用暗号方式ならば、それは違法複製が行
われた蓄積媒体と判断されず、正常に出力端子60から
再生データが出力される。また、もし、記録媒体識別デ
ータが記録不可能蓄積媒体で、暗号方式検出データが記
録可能蓄積媒体用暗号方式ならば、それは何らかの違法
複製が行われた蓄積媒体と判断し、出力端子60からの
再生データの出力が停止される。なお、本実施例では、
例えばDVD−ROMとDVD−RAMの二種類の蓄積
媒体を例に挙げたが、それ以外の蓄積媒体を扱う場合
も、同様に蓄積媒体識別データと暗号方式検出データを
比較することで、違法複製されたと判断された蓄積媒体
の再生を停止することができる。なお、本実施例では、
暗号検出処理回路40、再生制限処理回路50をハード
ウエアで実現したが、ソフトウエアであっても問題な
く、違法複製されたと判断された蓄積媒体の再生を停止
することができる。図3は本発明に係る再生装置の一実
施例を示す図である。図3において、10は蓄積媒体、
20は蓄積媒体識別処理回路、30は再生信号処理回
路、40は暗号方式検出処理回路、50は再生制限処理
回路、70は暗号復号処理回路、80は伸長信号処理回
路、90は出力端子である。図3に示す実施例は、DV
D−ROMドライブ装置、DVD−RAMドライブ装
置、またはDVD−ROMとDVD−RAM両方ともに
再生可能なドライブ装置を備えた映像・音声再生装置を
想定したものである。図3に示す映像・音声再生装置
は、蓄積媒体10、蓄積媒体識別処理回路20、再生信
号処理回路30、暗号方式検出処理回路40、再生制限
処理回路50は、図1と同じであり、それに暗号復号処
理回路70、伸長信号処理回路80、出力端子90をそ
の後段に付け足した構成をとる。前記実施例と同様に違
法複製されたと判断された蓄積媒体10の再生データ
は、再生制限処理回路50で、停止され、それより後段
へは、再生データが伝わらない。暗号方式検出処理回路
40は、検出した暗号方式データを再生制限処理回路5
0へ転送するだけでなく、暗号復号処理回路70にも転
送する。暗号復号処理回路70は、暗号方式検出処理回
路40で検出された暗号方式データに対応した暗号方式
で暗号を復号し、伸長信号処理回路80に転送する。伸
長信号処理回路80は、圧縮信号処理方式としては、例
えばMPEG2(Motion Picture Ex
perts Group Phase2)を使用し、伸
長されたデータは、映像・音声出力データとして、出力
端子90から出力される。なお、再生制限処理回路50
は、暗号復号処理回路70の後段で伸長信号処理80の
前段に配置しても、違法複製されたと判断された蓄積媒
体10の再生を停止することができる。また、再生制限
処理回路50は、暗号復号処理回路80の後段で出力端
子90の前段に配置してもよい。なお、本実施例では、
暗号復号処理70、伸長復号処理回路80をハードウエ
アで実現したが、ソフトウエアであっても問題はなく、
違法複製されたと判断された蓄積媒体の再生を停止する
ことができる。
Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a diagram showing one embodiment of a reproducing apparatus according to the present invention. In FIG. 1, 10
Is a storage medium, 20 is a storage medium identification processing circuit, 30 is a reproduction signal processing circuit, 40 is an encryption method detection processing circuit, 50 is a reproduction restriction processing circuit, and 60 is an output terminal. The embodiment shown in FIG. 1 is a DVD-ROM drive, a DVD-RAM drive, or a DVD-R used in ordinary homes.
It is assumed that the drive device can reproduce both the OM and the DVD-RAM. The storage medium 10 is, for example, a DV.
A non-recordable storage medium such as a D-ROM disc,
Alternatively, it is a recordable storage medium such as a DVD-RAM disk. The storage medium identification processing circuit 20 physically directly detects the type of the medium separately from the medium identification information recorded on the storage medium 10. In a medium that cannot be directly recorded and a medium that can be directly recorded, the reflectivity of bits indicating information 1 and 0 differs depending on the type of storage medium. Since lands and grooves are formed on the disk for addresses, the boundaries between lands and grooves are modulated, or the addresses are assigned differently, it is possible to physically identify the medium. The storage medium identification data detected by the storage medium identification processing circuit 20 is transferred to the reproduction restriction processing circuit 50. The bit-compressed video signal and audio signal, which are the main signals recorded in the storage medium 10, are transferred to the reproduction signal processing circuit 30 via the storage medium identification processing circuit 20. The reproduction signal processing circuit 30 reproduces the bit-compressed video signal and audio signal, which are the main signals recorded on the storage medium 10, and transfers the reproduced data to the encryption system detection processing circuit 40 and the reproduction restriction processing circuit 50. I do. If the storage medium 10 is a non-recordable storage medium, a corresponding non-storage medium encryption method is applied as the encryption method for the storage medium 10. If the storage medium 10 is a recordable storage medium, a corresponding storage medium encryption scheme is applied as the storage medium 10 encryption scheme. For example,
An encryption method different from that of a non-recordable storage medium is applied to a recordable storage medium, such as an encryption method with copy generation management such as one-time copying and copying. The encryption method detection processing circuit 40 detects whether the encryption method included in the main signal recorded on the storage medium 10 is an encryption method for a storable medium or an encryption method for a non-storable medium, and performs encryption. The data is transferred to the reproduction restriction processing circuit 50 as method detection data.
The reproduction restriction processing circuit 50 compares the storage medium identification data detected by the storage medium identification processing circuit 20 with the encryption method detection data detected by the encryption method detection processing circuit 40.
FIG. 2 shows the criteria for this comparison. If the recording medium identification data is a recordable storage medium and the encryption method detection data is an encryption method for a non-recordable storage medium, it is determined that the storage medium has undergone some illegal duplication, and the output terminal 60
The output of the reproduction data from is stopped. If the recording medium identification data is a recordable storage medium and the encryption method detection data is an encryption method for a recordable storage medium, it is not determined that the storage medium has been illegally copied, and the output terminal 60 is normally output.
Output reproduction data. If the recording medium identification data is a non-recordable storage medium and the encryption method detection data is an encryption method for a non-recordable storage medium, it is not determined that the storage medium has been illegally copied. Playback data is output. If the recording medium identification data is a non-recordable storage medium and the encryption method detection data is an encryption method for a recordable storage medium, it is determined that the storage medium has undergone some illegal duplication, and the Output of the reproduction data is stopped. In this embodiment,
For example, two types of storage media, a DVD-ROM and a DVD-RAM, have been described as an example. However, when other storage media are handled, the storage media identification data and the encryption method detection data are compared in the same manner, and illegal duplication is performed. The reproduction of the storage medium determined to have been performed can be stopped. In this embodiment,
Although the encryption detection processing circuit 40 and the reproduction restriction processing circuit 50 are realized by hardware, the reproduction of the storage medium determined to have been illegally copied can be stopped without any problem even by software. FIG. 3 is a diagram showing one embodiment of the reproducing apparatus according to the present invention. In FIG. 3, 10 is a storage medium,
20 is a storage medium identification processing circuit, 30 is a reproduction signal processing circuit, 40 is an encryption method detection processing circuit, 50 is a reproduction restriction processing circuit, 70 is an encryption / decryption processing circuit, 80 is a decompression signal processing circuit, and 90 is an output terminal. . The embodiment shown in FIG.
A video / audio playback device provided with a D-ROM drive device, a DVD-RAM drive device, or a drive device capable of playing both a DVD-ROM and a DVD-RAM is assumed. In the video / audio reproduction apparatus shown in FIG. 3, the storage medium 10, the storage medium identification processing circuit 20, the reproduction signal processing circuit 30, the encryption method detection processing circuit 40, and the reproduction restriction processing circuit 50 are the same as those in FIG. The configuration is such that an encryption / decryption processing circuit 70, a decompression signal processing circuit 80, and an output terminal 90 are added to the subsequent stage. The reproduction data of the storage medium 10 determined to have been illegally copied is stopped by the reproduction restriction processing circuit 50 in the same manner as in the above embodiment, and the reproduction data is not transmitted to the subsequent stage. The encryption method detection processing circuit 40 converts the detected encryption method data into a reproduction restriction processing circuit 5.
0, and also to the encryption / decryption processing circuit 70. The encryption / decryption processing circuit 70 decrypts the encryption by an encryption method corresponding to the encryption method data detected by the encryption method detection processing circuit 40, and transfers the decrypted signal to the decompression signal processing circuit 80. The decompression signal processing circuit 80 uses, for example, MPEG2 (Motion Picture Ex
The expanded data is output from the output terminal 90 as video / audio output data using the “parts Group Phase 2”. The reproduction restriction processing circuit 50
Can stop reproduction of the storage medium 10 determined to have been illegally copied even if it is disposed after the encryption / decryption processing circuit 70 and before the decompression signal processing 80. Further, the reproduction restriction processing circuit 50 may be arranged at a stage after the encryption / decryption processing circuit 80 and before the output terminal 90. In this embodiment,
Although the encryption / decryption processing 70 and the decompression / decryption processing circuit 80 are realized by hardware, there is no problem with software.
The reproduction of the storage medium determined to have been illegally copied can be stopped.

【発明の効果】本発明によれば、再生する蓄積媒体が少
なくとも2種類の蓄積媒体のうちのどの蓄積媒体である
かを識別した蓄積媒体識データと、蓄積媒体に記録され
た情報が少なくとも2種類の蓄積媒体のそれぞれに対応
した少なくとも2種類の暗号方式で暗号化されているか
どうかを検出した暗号方式検出データを比較することに
より、違法に複製された蓄積媒体を検出した時には視聴
できないようにできる。さらに、本発明によれば、再生
する蓄積媒体が記録可能な蓄積媒体であるか記録不可能
な蓄積媒体であるかを識別した蓄積媒体識別データと、
蓄積媒体に記録された情報が記録可能な蓄積媒体に対応
した暗号方式で暗号化されているかどうかおよび記録不
可能な蓄積媒体に対応した暗号方式で暗号化されている
かどうかを検出した暗号方式検出データを比較すること
により、記録可能な蓄積媒体から記録不可能な蓄積媒体
へ、または記録不可能な蓄積媒体から記録可能な蓄積媒
体へ何らかの方法により違法に複製された蓄積媒体を検
出した時には視聴できないようにできる。
According to the present invention, the storage medium identification data for identifying which of the at least two types of storage medium the storage medium to be reproduced is, and at least two pieces of information recorded on the storage medium. By comparing the encryption method detection data that detects whether or not encryption has been performed by at least two types of encryption methods corresponding to each type of storage medium, it is possible to prevent viewing when an illegally duplicated storage medium is detected. it can. Further, according to the present invention, storage medium identification data for identifying whether the storage medium to be reproduced is a recordable storage medium or a non-recordable storage medium,
An encryption method detection that detects whether the information recorded on the storage medium has been encrypted with the encryption method corresponding to the recordable storage medium and whether it has been encrypted with the encryption method corresponding to the non-recordable storage medium. By comparing data, if a storage medium illegally copied in any way from a recordable storage medium to a non-recordable storage medium or from a non-recordable storage medium to a recordable storage medium is detected, viewing is performed. I can do it.

【図面の簡単な説明】[Brief description of the drawings]

【図1】蓄積媒体再生装置のブロック図。FIG. 1 is a block diagram of a storage medium reproducing apparatus.

【図2】蓄積媒体識別データと暗号方式検出データによ
り再生の可否を示した図。
FIG. 2 is a diagram showing whether reproduction is possible or not based on storage medium identification data and encryption method detection data.

【図3】蓄積媒体再生装置のブロック図。FIG. 3 is a block diagram of a storage medium reproducing device.

【符号の説明】[Explanation of symbols]

10…蓄積媒体、20…蓄積媒体識別処理回路、30…
再生信号処理回路、40…暗号方式検出処理回路、50
…再生制限処理回路、60、90…出力端子、70…暗
号復号処理回路、80…伸長復信号処理回路。
10 ... storage medium, 20 ... storage medium identification processing circuit, 30 ...
Reproduction signal processing circuit, 40 ... encryption system detection processing circuit, 50
... Reproduction restriction processing circuit, 60, 90... Output terminal, 70... Encryption / decryption processing circuit, 80.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 竹内 敏文 神奈川県横浜市戸塚区吉田町292番地株式 会社日立製作所デジタルメディア開発本部 内 Fターム(参考) 5C053 FA13 FA20 FA21 FA24 FA25 HA40 5D044 AB07 BC02 CC04 DE47 DE50 HH13 HH15 5D066 HA01  ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Toshifumi Takeuchi 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture F-term within the Digital Media Development Division, Hitachi, Ltd. 5C053 FA13 FA20 FA21 FA24 FA25 HA40 5D044 AB07 BC02 CC04 DE47 DE50 HH13 HH15 5D066 HA01

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】蓄積媒体に記録された情報を再生する再生
装置において、 再生する蓄積媒体が少なくとも2種類の蓄積媒体のうち
のどの蓄積媒体であるかを識別する蓄積媒体識別手段
と、 蓄積媒体に記録された情報が少なくとも2種類の蓄積媒
体のそれぞれに対応した少なくとも2種類の暗号方式で
暗号化されているかどうかを検出する暗号方式検出手段
と、 暗号方式検出手段により検出された暗号方式が蓄積媒体
識別手段により識別された蓄積媒体の種類に対応した暗
号方式と異なる場合に情報の再生を停止する再生制限手
段を有することを特徴とする再生装置。
1. A reproducing apparatus for reproducing information recorded on a storage medium, comprising: a storage medium identifying unit for identifying which of the at least two types of storage medium the storage medium to be reproduced is; Means for detecting whether or not the information recorded in the storage medium is encrypted by at least two types of encryption methods corresponding to at least two types of storage media, respectively. A reproduction apparatus comprising: a reproduction restriction unit that stops reproduction of information when the encryption method is different from the encryption method corresponding to the type of the storage medium identified by the storage medium identification unit.
【請求項2】請求項1に記載の再生装置において、 前記蓄積媒体識別手段は再生する蓄積媒体が記録可能な
蓄積媒体であるか記録不可能な蓄積媒体であるかを識別
する手段であり、 前記暗号方式検出手段は蓄積媒体に記録された情報が記
録可能な蓄積媒体に対応した暗号方式で暗号化されてい
るかどうかおよび記録不可能な蓄積媒体に対応した暗号
方式で暗号化されているかどうかを検出する手段であ
り、 前記再生制限手段は蓄積媒体が記録可能な蓄積媒体であ
ると識別されて蓄積媒体に記録された情報が記録不可能
な蓄積媒体に対応した暗号方式で暗号化されていると検
出された場合と、蓄積媒体が記録不可能な蓄積媒体であ
ると識別されて蓄積媒体に記録された情報が記録可能な
蓄積媒体に対応した暗号方式で暗号化されていると検出
された場合に情報の再生を停止する手段であることを特
徴とする再生装置。
2. The reproducing apparatus according to claim 1, wherein said storage medium identifying means is means for identifying whether the storage medium to be reproduced is a recordable storage medium or a non-recordable storage medium. The encryption method detection means determines whether the information recorded on the storage medium is encrypted by an encryption method corresponding to the recordable storage medium and whether the information is encrypted by an encryption method corresponding to the non-recordable storage medium. The playback restricting unit is configured to identify that the storage medium is a recordable storage medium, and to encrypt information recorded on the storage medium with an encryption method corresponding to a non-recordable storage medium. Is detected, and it is detected that the storage medium is identified as a non-recordable storage medium and that the information recorded on the storage medium is encrypted by an encryption method corresponding to the recordable storage medium. Reproducing apparatus, characterized in that when it is a means for stopping the reproduction of the information.
JP11121252A 1999-04-28 1999-04-28 Reproducer Pending JP2000311436A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11121252A JP2000311436A (en) 1999-04-28 1999-04-28 Reproducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11121252A JP2000311436A (en) 1999-04-28 1999-04-28 Reproducer

Publications (2)

Publication Number Publication Date
JP2000311436A true JP2000311436A (en) 2000-11-07
JP2000311436A5 JP2000311436A5 (en) 2004-11-18

Family

ID=14806672

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11121252A Pending JP2000311436A (en) 1999-04-28 1999-04-28 Reproducer

Country Status (1)

Country Link
JP (1) JP2000311436A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002060179A1 (en) * 2001-01-26 2002-08-01 Fujitsu Limited Method and apparatus for copy protection, and copy protection program
WO2002082280A1 (en) * 2001-04-05 2002-10-17 Ed-Contrive Inc. Method for preventing unauthorized copy application program execution, its program, its program recording apparatus, and its program recording medium
JP2003111014A (en) * 2001-09-29 2003-04-11 Toshiba Corp Rendering device, recording device, copy control method and program
WO2004109521A1 (en) * 2003-06-06 2004-12-16 Ed-Contrive Inc. Copy prevention program, computer-readable recording medium containing the program, and copy prevention system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002060179A1 (en) * 2001-01-26 2002-08-01 Fujitsu Limited Method and apparatus for copy protection, and copy protection program
WO2002082280A1 (en) * 2001-04-05 2002-10-17 Ed-Contrive Inc. Method for preventing unauthorized copy application program execution, its program, its program recording apparatus, and its program recording medium
CN100388243C (en) * 2001-04-05 2008-05-14 玉帝·空来富有限公司 Method for preventing unauthorized copy application program execution, its program, program recording apparatus and its program recording medium
JP2003111014A (en) * 2001-09-29 2003-04-11 Toshiba Corp Rendering device, recording device, copy control method and program
WO2004109521A1 (en) * 2003-06-06 2004-12-16 Ed-Contrive Inc. Copy prevention program, computer-readable recording medium containing the program, and copy prevention system

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