WO2008068700A1 - Support optique régénérable avec fenêtre de visualisation limitée - Google Patents

Support optique régénérable avec fenêtre de visualisation limitée Download PDF

Info

Publication number
WO2008068700A1
WO2008068700A1 PCT/IB2007/054886 IB2007054886W WO2008068700A1 WO 2008068700 A1 WO2008068700 A1 WO 2008068700A1 IB 2007054886 W IB2007054886 W IB 2007054886W WO 2008068700 A1 WO2008068700 A1 WO 2008068700A1
Authority
WO
WIPO (PCT)
Prior art keywords
access control
optical storage
layer
storage medium
access
Prior art date
Application number
PCT/IB2007/054886
Other languages
English (en)
Inventor
Ronald J. A. Van Den Oetelaar
Antonius E. T. Kuiper
Donato Pasquariello
Original Assignee
Koninklijke Philips Electronics N.V.
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 Koninklijke Philips Electronics N.V. filed Critical Koninklijke Philips Electronics N.V.
Publication of WO2008068700A1 publication Critical patent/WO2008068700A1/fr

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G11B20/00731—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a digital rights management system for enforcing a usage restriction
    • G11B20/0084—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a digital rights management system for enforcing a usage restriction wherein the usage restriction can be expressed as a specific time or date
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G11B20/00572—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which change the format of the recording medium
    • G11B20/00586—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which change the format of the recording medium said format change concerning the physical format of the recording medium
    • G11B20/00608—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which change the format of the recording medium said format change concerning the physical format of the recording medium wherein the material that the record carrier is made of is altered, e.g. adding reactive dyes that alter the optical properties of a disc after prolonged exposure to light or air
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/2403—Layers; Shape, structure or physical properties thereof

Definitions

  • the present invention relates generally to optical storage medium and use of such an optical storage medium for distributing content.
  • the application also relates to a method of distributing content stored in a data layer of an optical storage medium and a method of distributing content.
  • optical storage media for distribution of content, such as video content music, games or software
  • content is used to describe any intellectual creation that is copyrighted and that a copyright owner intends to distribute in certain markets, by itself or via third parties. It is assumed to comprise any of the following or combination thereof: video content, such as movies, audio content, such as music and audio books, games and/or software.
  • distributed is used to describe any means or methods of making content available to third parties, for example by means of direct sale, rental or licensing.
  • a known optical disc is the "limited lifetime" or “limited use” disc.
  • An example of such a disc is the "ez-D” disc, known, for example, from US 6,790,501.
  • An ez-D disc is supplied in a vacuum-sealed package, and when the package is opened the content on the disc can only be played for a limited time.
  • the ez-D disc works on the principle that a reactive dye is mixed with the adhesive that bonds the DVD layer with a substrate (i.e. polycarbonate layer).
  • the dye which is sandwiched between the two polycarbonate layers, undergoes a transition from a reduced state to an oxidized state when exposed to air, as oxygen from the air diffuses through the polycarbonate layers.
  • the dye is transparent in the reduced state whereas, in the oxidized state, the dye absorbs wavelengths used for optical writing and reading, thus making the data in the DVD layer unreadable.
  • the governing degradation mechanism is that oxygen diffuses through the polycarbonate and reacts with the reactive dye.
  • Limited lifetime discs are used for content distribution by means of rental, whereby a customer purchases the movie at a gas station, supermarket or wherever, and can then choose to watch the movie at a later time. However, once the vacuum seal is broken, the limited lifetime disc only has a predetermined play life. For example, the ez-D disc expires after a 48 hours play lifetime.
  • An optical storage medium comprises a data layer wherein information is stored and access control means for controlling access to at least part of the data layer, the access control means being enabled to switch from an initial state, the initial state allowing access to at least part of the stored information in the data layer, to a second state, the second state inhibiting said access, after a predetermined period of time from an activation moment, the access control means being enabled to revert to the state allowing access.
  • the access control means are enabled to revert to the state allowing access, if the optical storage medium is used for renting content to a customer and it is returned by the customer at any moment after the predetermined period of time, the state of the access control means can be reverted and the optical storage medium can be re-used for renting the content to another customer. Consequently, as an optical storage medium can be used several times, the total cost of producing the media is reduced. Part of this cost reduction may be used for providing an incentive to customers for returning the optical storage media, thereby alleviating said environmental concerns.
  • the access control means comprise an access control layer, the access control layer covering at least part of the data layer, the data layer suitable to be scanned by means of a focused radiation beam in an optical scanning apparatus, the access control layer being enabled to switch from a state allowing saind scanning of the data layer to a state inhibiting said scanning.
  • DRM Digital Rights Management
  • the activation moment corresponds to an exposure of the access control layer to an activating substance, the access control layer being enabled to change an optical property after said exposure. This allows control of the start moment of the limited viewing window.
  • the access control layer is positioned with respect to other layers on a surface of the optical storage medium.
  • the reactive dye is sandwiched between the two polycarbonate substrate layers, the governing degradation mechanism is that oxygen diffuses through the substrate and reacts with the reactive dye.
  • the lifetime is controlled by means of controlling the diffusion rate of oxygen through the substrate layers, such reactive dye is required to sandwiched between the two polycarbonate substrate layers.
  • such placement between the two polycarbonate substrate layers inhibits access to said dye, therefore it is not possible to revert the dye to the original state after oxidation.
  • the access control layer when the access control layer is positioned with respect to other layers on a surface of the optical storage medium, the access control layer is accessible for reagents and such reversal is possible. Furthermore, according to one aspect of the invention the access control layer further comprises means for controlling the length of the predetermined period of time.
  • a cover layer is provided on top of the access control layer, the cover layer having a high porosity. The cover layer may provide protection, for example against scratches, while the high porosity provides accessibility for reagents such that reversal of the state of the access control layer.
  • the activating substance is atmospheric oxygen
  • the access control layer is enabled to switch from an oxidized state inhibiting scanning of the data layer to a reduced state allowing said scanning by exposure to a reducing agent.
  • the reducing agent is hydrogen or hydrogen sulphide gas. It is noted that this aspect is advantageously combined with the used of a porous cover layer, as the diffusion constant of a gas through such layer is much higher. It is further noted that hydrogen gas has a smaller molecule that O 2 , therefore the diffusion of hydrogen is expected to be higher that that of atmospheric oxygen. Consequently, when hydrogen is used as reducing gas, the diffusion layer may advantageously be used for further controlling the predetermined period of time that the stored content in the data layer is accessible.
  • a method of distributing content comprising steps of: storing the content in a data layer wherein information, the data layer suitable to be read by means of a radiation beam in an optical scanning apparatus, providing access control means for controlling access to at least part of the data layer, the access control means being enabled to switch from a state allowing access to at least part of the stored information to a state blocking to said access at least part of the stored information after a predetermined period of time from an activation moment, distributing said optical storage media and receiving the optical storage media and after the predetermined period of time and reverting access control means to the state allowing access.
  • the data layer may be of the re-writable type, therefore allowing changing the content stored in the data layer prior to redistribution.
  • a customer may be provided at any time with any number of optical storage media up to a predetermined number.
  • a rental business model known for example from US 7,024,381
  • customers pay a monthly subscription fee.
  • the subscription allows the customer to keep a revolving library of a preset number of optical media.
  • the customer can exchange an old optical media for a new optical media in this library by sending the old media back to rental company, and receiving a new optical media by mail in return.
  • the customer is allowed to exchange content as often as he/she likes.
  • Figure Ia illustrates a conventional optical storage medium while Figure Ib illustrated a cross section through a known optical storage medium having a limited viewing window;
  • Figure 2 illustrates a cross section through an optical storage medium according to an aspect of the invention
  • Figure 3 illustrates chemical reaction methylene blue to leuco methylene blue
  • Figure 4a illustrates the measured absorption and transmission spectra of the disc comprising an access control layer comprising methylene blue in the oxidized state
  • Figure 4b illustrates the time dependence of the absorbance and transmission a layer comprising methylene blue in the reduced state is exposed to air
  • Figure 4c the time dependence of the absorbance and transmission a layer comprising methylene blue layer in the oxidized state while immersed in a 2% Sn(II) ethylhexanoate solution
  • Figure 5 illustrates a cross section through an optical storage medium according to another aspect of the present invention
  • Figure 6 illustrates an optical storage medium according to another aspect of the present invention.
  • Figure 7 illustrates a method of distributing entertainment content according to an aspect of the present invention.
  • Figure 8 illustrates a method of distributing content according to another aspect of the present invention.
  • Figure Ia shows a conventional optical storage medium 11 having a track 12 and a central hole 10.
  • the track 12 being the position of the series of (to be) recorded marks representing information, is arranged in accordance with a single spiral pattern constituting substantially parallel tracks on a data layer.
  • Known examples of optical storage media suitable for distribution of content are CD-ROM, known from ECMA- 130 or DVD-ROM, known from ECMA-267 (also known as ISO IEC 16449).
  • the track structure is constituted, for example, by a pre-groove, which enables a read/write head to follow the track during scanning.
  • the track structure comprises position information, e.g. addresses, for indication the location of units of information, usually called information blocks.
  • the position information includes specific synchronizing marks for locating the start of such information blocks.
  • the position information is encoded in frames of modulated wobbles.
  • an optical storage medium usually comprises a transparent substrate, the data layer and a protective layer.
  • the data layer is at a 0.6mm substrate and a further substrate of 0.6 mm is bonded to the backside thereof.
  • the pregroove may be implemented as an indentation or elevation of the substrate material, or as a material property deviating form its surroundings.
  • the optical storage medium 11 is intended for carrying real-time information according to a standardized format, to be playable on standardized playback devices.
  • the recording format includes the way information is recorded, encoded and logically mapped.
  • the logical mapping may comprise a subdivision of the available area in a lead-in, a recording area for user data and a lead-out. Further, the mapping may comprise file management information for retrieving the user information, such as a Table of Contents or a file system, e.g. ISO 9660 for CD-ROM or UDF for DVD-ROM or high-density optical media such as Blu-ray (BD).
  • file management information is mapped on a predefined location on the record carrier, usually in or directly after the lead-in area.
  • Figure Ib illustrates a cross section through a known type of optical disc, the so-called “limited lifetime” or “limited use” disc.
  • An example of such a disc is the "ez-D" disc, as known, for example, from US 6,790,501.
  • the ez-D disc comprises a bottom substrate layer 13 and a top substrate layer 17 that are bonded together, a data layer 14 and a reflective layer 15 being present at the interface thereof.
  • a reactive dye is mixed in the adhesive layer 23 that bonds the data layer 14 with the top substrate 17 (i.e. the top polycarbonate layer).
  • An ez-D disc is a DVD type disc supplied in a vacuum-sealed package, and when the package is opened the content on the disc can only be played for a limited time.
  • the dye goes from a reduced state to an oxidized state when exposed to air.
  • the dye is transparent in the reduced state whereas, in the oxidized state, the dye absorbs wavelengths used for optical writing and reading, thus making the data in the DVD layer unreadable.
  • the governing degradation mechanism is that oxygen diffuses through the substrate and reacts with the reactive dye.
  • this type of disc provides a limited lifetime or limited use disc, which is achieved by superimposing the data layer with a layer that darkens when in contact with air. The lifetime is controlled by means of controlling the diffusion rate of oxygen through the substrate layers.
  • Limited lifetime discs are exclusively used for content distribution by means of rental, whereby a customer purchases the movie at a gas-station, supermarket or wherever, and the customer can choose afterwards to watch the movie at a later time.
  • the limited lifetime disc has only a predetermined playback life. For example, the ez-D only has a 48 hours playback lifetime.
  • An optical storage medium is characterized by comprising access control means for controlling access to at least part of the data layer, the access control means being enabled to switch from a state allowing access to at least part of the stored information to a state blocking to said access at least part of the stored information after a predetermined period of time wherein the access control means are enabled to revert to the state allowing access.
  • access control means for controlling access to at least part of the data layer, the access control means being enabled to switch from a state allowing access to at least part of the stored information to a state blocking to said access at least part of the stored information after a predetermined period of time wherein the access control means are enabled to revert to the state allowing access.
  • FIG. 2 illustrates a cross section through an optical storage medium according to an aspect of the invention.
  • topside means the side that is located towards the laser source, whereas the term “topside”
  • underside means the side located away from the laser source.
  • the optical storage medium comprises a stack of layers, including an underside substrate 21, a data layer 22, wherein the information may be stored, a topside substrate 24 and an access control layer 23. It is noted that, unlike the known ez-D disc, the access control layer 23 is placed on the topside surface of the topside substrate layer instead of being sandwiched between the two substrate layers.
  • the access control layer 23 it is chosen such that it has two states, a first state that allows readout access of the data layer and a second state that blocks readout access to the data layer.
  • the access control layer 23 is further chosen such that a transition from the first state to the second state takes place automatically after a predetermined period from an activation event. Moreover, it is possible that to revert the state of the access control layer 23 from the second state to the first state.
  • LeucoMethylene blue is a known reactive dye that changes reversibly from a reduced transparent state to a blue oxidised state, known as methylene blue.
  • Fig. 3 a illustrates the reversible oxidation-reduction process of leuco methylene blue (transparent) into methylene blue (blue).
  • the access control layer 23 comprises a mixture of leuco methylene blue and Sn(II) 2-ethyl hexanoate.
  • Sn(II) 2-ethyl hexanoate will transform into Sn(IV) 2-ethyl hexanoate in the present of an oxidizing agent. This latter conversion is not an equilibrium reaction, as opposed to that involving (leuco)methylene blue redox couple.
  • Sn(II) 2-ethyl hexanoate The oxidation potential of Sn(II) 2-ethyl hexanoate is much lower than that of leuco methylene blue. Consequently, in the presence of an oxidant (oxygen from the ambient atmosphere, H 2 O 2 , etc.) Sn(II) 2-ethyl hexanoate oxidizes and forms Sn(IV) 2-ethyl hexanoate before the oxidation of leuco methylene blue starts. Only after all Sn(II) 2-ethyl hexanoate is consumed the oxidation and coloration of leuco methylene blue starts.
  • the concentration of Sn(II) 2-ethyl hexanoate in the access control layer 23 determines the incubation time before the access control layer 23 switches to the state inhibiting readout of the data layer, when the disc is exposed to ambient oxygen.
  • the predetermined period of time that the stored content in the data layer is accessible may be increased or reduced.
  • a disc comprising a 0.6 mm transparent polycarbonate substrate, an adhesive layer in the order of 25 micron comprising acrylate and Sn(II) ethyl hexanoate corresponding to 0.2% atomic Sn and a 100 nm thick layer comprising leuco methylene blue dye was exposed to air, so that the dye would oxidize to the blue state,
  • Figure 4a illustrates the measured absorption and transmission spectra of the disc comprising the oxidized methylene blue layer. A strong absorption peak in the red part of the spectrum is visible.
  • Figure 4b illustrates the time dependence of the absorbance and transmission a layer comprising methylene blue in the reduced state while exposed to air, as monitored with UV VIS spectroscopy at a wavelength of 588nm.
  • the wavelength of 588 nm was chosen instead of 650 nm corresponding to a red laser as used in CD and DVDV systems in order to be able to monitor the start of the oxidation/reduction reaction.
  • the absorbance of the layer at 650 nm of is too high when the methylene blue is in the oxidized state to be measured and, moreover, small changes in the transmission cannot be distinguished. Consequently, the absorbance and transmission at 588nm were measured, which resembles the behavior at 650 nm.
  • a cuvette with a path length of 1 mm was filled with the prepared solution of 2% Sn(II) ethyl hexanoate and the disc comprising the access control layer comprising methylene blue in the oxidized state as the active dye was place inside.
  • the layer comprising the dye is treated in the Sn(II) ethyl hexanoate solution, new Sn(II) salt is added to layer.
  • the solution reverses the oxidation reaction, leading to the oxidized methylene blue being reduced back to leuco methylene blue (transparent).
  • Figure 4c illustrates the time dependence of the absorbance and transmission a layer comprising methylene blue in the reduced state while immersed to the 2% Sn(II) ethyl hexanoate solution, as monitored with UV VIS spectroscopy at a wavelength of 588nm.
  • Sn(II) ethyl hexanoate solution as monitored with UV VIS spectroscopy at a wavelength of 588nm.
  • Figure 5 illustrates a cross section through an optical storage medium according to another aspect of the present invention
  • the time it takes for the regeneration, that is turning the reactive layer back to the transparent state using e.g. a Sn(II) ethyl hexanoate solution is then governed by the permeability of said cover layer.
  • the topside or the bottom side polycarbonate substrate may act as a cover layer, assuming these are further adapted with respect to their permeability, for example by using a porous layer.
  • a reducing gas such as, for example H 2 or H 2 S may be used as a reducing agent instead of the Sn(II) ethyl hexanoate solution.
  • a cover layer as the diffusion constant of a gas through the cover layer is much higher.
  • hydrogen gas has a smaller molecule that O 2 , therefore the diffusion of hydrogen is expected to be higher that that of atmospheric oxygen. Consequently, when hydrogen is used as reducing gas, the cover layer may advantageously be used for further controlling the predetermined period of time that the stored content in the data layer is accessible.
  • the access control layer it is sufficient to provide a reactive dye or indicator that, upon oxidation, gradually and reversibly transform from colorless to either blue (high absorption in the range of 600-700nm) or red, or upon oxidation, gradually and reversibly change color from red to blue or from blue to red.
  • a dye or indicator having a high absorption in the range of 600-700nm in the oxidized state is suitable for use when the optical storage media requires a red laser for reading, such as DVD and CD media.
  • a dye or indicator having a high absorption in the blue range in the oxidized state is suitable for use when the optical storage media requires a blue laser for reading, such as high-density discs such as Blu-ray (BD) or HD-DVD.
  • known dyes that are change from colorless to blue upon oxidation are Acridine Yellow (C 15 H 16 N 3 Cl), which has a strong absorption peak centered around 41 lnm in the oxidized state and Triarlymethane dyes.
  • oxazines containing a N and an O atom in the second ring
  • thiazines containing a N and a S atom in the second ring
  • the predetermined period before the oxidation of the reactive dye or indicator is controlled by the presence of a determined amount of a buffer substance having a lower oxidation potential.
  • a buffer substance having a lower oxidation potential By adding or substrating the buffer substance in the access control layer the lifetime is increased or reduced, respectively.
  • its composition comprises at least two components, the first one is a dye or indicator which forms a redox couple with athmospheric oxygen, and the second component that has a lower oxidation potential that the first component and that is transparent both in reduced and oxidized state.
  • the first component is responsible for the change in absorption parameters in the desired range as described above, while the second component is responsible for controlling the predetermined period of time.
  • FIG. 6 illustrates an optical storage medium according to another aspect of the present invention
  • Region 62 comprises stored information, such as a main feature in a movie, that is protected by an access control layer as described with reference to Fig. 2 or 5.
  • Region 61 comprises further information, such as special content features, and its structure correspond to a normal optical media, that is the information stored therein is directly accessible.
  • Said regions are shown as annular regions around the hole 10, with Region 62 shown towards the outside.
  • Such a physical arrangement provides the advantage of compatibility with standard player devices, which expect the lead-in region to be located at the inner part of a track. However, different arrangements are possible.
  • Figure 7 illustrates a method of distributing content according to an aspect of the present invention.
  • step 71 the content is stored onto the optical storage medium
  • step 72 access control means as detailed above with respect to Figs 2 to 6 are provided.
  • the length of the predetermined period i.e. the length of the viewing window
  • the optical storage medium may be stored in a protective atmosphere.
  • step 73 EXP
  • the start of the viewing window is set, for example by exposing the optical storage medium to atmospheric oxygen.
  • the optical storage medium is distributed by a distributor, for example rented to a consumer by a rental company.
  • step 71-73 may be taken by a different party than the distributor, for example a producing company.
  • the distribution step 74 preceded the exposure step 73, wherein the exposure step 73 corresponds to the consumer opening a jewel case, therefore exposing the optical storage medium to atmospheric oxygen.
  • the customer After viewing the content and possibly after the expiry of the viewing window, the customer returns the optical storage medium to the distributor in step 75 (RETR).
  • step 76 the received the optical storage medium, having the access control means in state inhibiting scanning access to the data layer, are reverted to the initial state allowing access, as described above with respect to Figs 2 to 6.
  • step 77 CH/REDISTR
  • the regenerated optical media is redistributed. It is noted that if a rewritable optical media is used, it is also possible to change the stored content in this step before redistribution.
  • Figure 8 illustrates a method of distributing content according to another aspect of the present invention.
  • This relates to renting content to customers, wherein the customers pay a monthly subscription fee for the right to keep a revolving library of a predefined number of optical media.
  • the customer can exchange an old optical media for a new optical media in this library by sending the old media back to rental company, and receiving a new optical media by mail in return.
  • step 81 USR REQ
  • step 82 ( ⁇ N?)
  • step 83 optical storage medium according to the invention, that is provided with access control means as detailed above with respect to Figs 2 to 6 is prepared and the start of the viewing window is set, for example by exposing the optical storage medium to atmospheric oxygen.
  • the length of the predetermined period i.e. the length of the viewing window, may be set in dependent on the content stored on disc. For instance, popular DVDs may be given a shorter viewing window, in order to increase their turnover rate.
  • step 84 (DISTRIB)
  • the optical storage media is sent to the customer.
  • step (84) an optical storage medium is received from the user and the access control means are reset to the initial state, so that said medium can be reused.
  • An optical storage medium having a limited viewing window that is regenerable comprises a data layer wherein information is stored, access control means for controlling access to at least part of information stored in the data layer, the access control means being enabled to switch from an initial state, the initial state allowing access to at least part of the stored information in the data layer, to a second state, the second state inhibiting said access, after a predetermined period of time from an activation moment, wherein the access control means are enabled to revert to the initial state allowing access.
  • the optical storage medium is preferably used for renting content wherein the limited viewing window is replacing additional fees as an incentive for customer to return the disc in time.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Signal Processing (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)

Abstract

La présente invention concerne un support de stockage optique possédant une fenêtre de visualisation limitée qui est régénérable. Le support de stockage optique comprend une couche de données (22) dans laquelle des informations sont stockées, des moyens de contrôle d'accès pour contrôler l'accès à au moins une partie des informations stockées dans la couche de données, les moyens de contrôle d'accès (23) étant en mesure de passer d'un état initial, ledit état initial permettant l'accès à au moins une partie des informations stockées dans la couche de données, à un second état, ce même second état empêchant ledit accès, après une période déterminée à partir d'un moment d'activation, lesdits moyens de contrôle d'accès étant en mesure de revenir à l'état initial permettant l'accès. Le support de stockage optique est utilisé de préférence pour du contenu en location dans lequel la fenêtre de visualisation limitée remplace des frais supplémentaires comme incitation à ce que le client restitue le disque à temps.
PCT/IB2007/054886 2006-12-08 2007-12-03 Support optique régénérable avec fenêtre de visualisation limitée WO2008068700A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP06125706.9 2006-12-08
EP06125706 2006-12-08

Publications (1)

Publication Number Publication Date
WO2008068700A1 true WO2008068700A1 (fr) 2008-06-12

Family

ID=39267844

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2007/054886 WO2008068700A1 (fr) 2006-12-08 2007-12-03 Support optique régénérable avec fenêtre de visualisation limitée

Country Status (2)

Country Link
TW (1) TW200836188A (fr)
WO (1) WO2008068700A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5815484A (en) * 1995-12-28 1998-09-29 Hide And Seek Technologies L.L.C. Copy protectable optical media device and methodology therefor
JPH11283281A (ja) * 1998-03-27 1999-10-15 Ricoh Co Ltd 光記録媒体及びそのライトプロテクト方法
WO2002099470A2 (fr) * 2001-06-05 2002-12-12 Flexplay Technologies, Inc. Dispositifs optiques a duree de lecture limitee avec couche reactive interstitielle et leurs procedes de fabrication

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5815484A (en) * 1995-12-28 1998-09-29 Hide And Seek Technologies L.L.C. Copy protectable optical media device and methodology therefor
JPH11283281A (ja) * 1998-03-27 1999-10-15 Ricoh Co Ltd 光記録媒体及びそのライトプロテクト方法
WO2002099470A2 (fr) * 2001-06-05 2002-12-12 Flexplay Technologies, Inc. Dispositifs optiques a duree de lecture limitee avec couche reactive interstitielle et leurs procedes de fabrication

Also Published As

Publication number Publication date
TW200836188A (en) 2008-09-01

Similar Documents

Publication Publication Date Title
JP4243059B2 (ja) 使捨て式光学記憶媒体とその製造方法
US6790501B2 (en) Limited-play optical media with improved shelf-life and playability
US7698716B2 (en) Optical media, read inhibiting agents and methods of making and using same
US8355311B2 (en) Hybrid optical disc
EP2062257A1 (fr) Support d'enregistrement d'informations et procede et dispositif d'enregistrement et/ou reproduction
JPH11312363A (ja) 光記録媒体および光記録装置
TWI282549B (en) Data media, manufacturing method thereof, playing control method and drive device
JP4425269B2 (ja) 情報記録媒体
WO2008068700A1 (fr) Support optique régénérable avec fenêtre de visualisation limitée
US20100034075A1 (en) Optical disc with postponed viewing window
EP1933312A1 (fr) Support de stockage optique et appareil respectif pour l'enregistrement et/ou écriture de données
EP2052387B1 (fr) Support de stockage optique à accès limité
US20080044159A1 (en) DVD enhanced with audio CD content
US8326119B2 (en) Optical record carrier, as well as a method and an apparatus for recording a disc shaped optical record carrier
US8526282B1 (en) Method for replicating media using unique identifiers
JP4507181B2 (ja) 情報記録媒体、情報記録装置及び方法、並びに、コンピュータプログラム
JP2004103101A (ja) 光情報記録媒体
CN101661782A (zh) 光学记录载体及用以记录碟状光学记录载体的方法与装置
CN101099204A (zh) 光学介质、读抑制剂及其制造和使用方法

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 07849304

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 07849304

Country of ref document: EP

Kind code of ref document: A1