WO2001069350A1 - Method and system for controlling access to components of a multimedia scene - Google Patents
Method and system for controlling access to components of a multimedia scene Download PDFInfo
- Publication number
- WO2001069350A1 WO2001069350A1 PCT/EP2000/012541 EP0012541W WO0169350A1 WO 2001069350 A1 WO2001069350 A1 WO 2001069350A1 EP 0012541 W EP0012541 W EP 0012541W WO 0169350 A1 WO0169350 A1 WO 0169350A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- component
- scene
- identification
- scene description
- content
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 18
- 238000004590 computer program Methods 0.000 claims description 11
- 238000012360 testing method Methods 0.000 claims description 6
- 230000015654 memory Effects 0.000 claims description 4
- 239000012634 fragment Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000003936 working memory Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- QHLFJSMAWAWVRU-UHFFFAOYSA-N n-(5-chloro-4-methyl-1,3-thiazol-2-yl)propanamide Chemical compound CCC(=O)NC1=NC(C)=C(Cl)S1 QHLFJSMAWAWVRU-UHFFFAOYSA-N 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/60—Protecting data
- G06F21/62—Protecting access to data via a platform, e.g. using keys or access control rules
- G06F21/6209—Protecting access to data via a platform, e.g. using keys or access control rules to a single file or object, e.g. in a secure envelope, encrypted and accessed using a key, or with access control rules appended to the object itself
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/10—Protecting distributed programs or content, e.g. vending or licensing of copyrighted material ; Digital rights management [DRM]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
- H04N21/254—Management at additional data server, e.g. shopping server, rights management server
- H04N21/2541—Rights Management
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
- H04N21/835—Generation of protective data, e.g. certificates
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2221/00—Indexing scheme relating to security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F2221/21—Indexing scheme relating to G06F21/00 and subgroups addressing additional information or applications relating to security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F2221/2141—Access rights, e.g. capability lists, access control lists, access tables, access matrices
Definitions
- the invention relates to an apparatus for presenting a scene that is represented in an electronic form.
- the invention further relates to a method of presenting a scene that is represented in an electronic form.
- the invention further relates to a computer program product for carrying out such a method and a storage medium carrying such a computer program product.
- the invention further relates to an apparatus for producing a scene description.
- the invention further relates to a method of producing a scene description.
- the invention further relates to a storage medium carrying such a scene description.
- the reproduction of a multimedia presentation on a computer or the like may involve several elements.
- the presentation may comprise various pieces of video and/or images, possibly combined with audio fragments. It is known to specify such a multimedia presentation in a so-called scene description.
- the Synchronized Multimedia Integration Language (SMIL 1.0 Specification, REC-smil-19980615), defined by the World Wide Web Consortium, is a suitable language to define such a scene description.
- the scene description specifies a number of components of which the content contributes to the content of the scene, e.g. some images that are to be displayed on the screen and an audio fragment that is to be played back. Furthermore, the scene description specifies the mutual relationships between these components, e.g.
- the content description is a file in the SMIL format and the individual components are other respective files in the appropriate formats, e.g. images in GIF and JPEG and audio fragments in MP3.
- a presentation engine parses the scene description file and retrieves a component file when this becomes necessary during the presentation of the scene.
- a typical example of a system organization includes a server computer on which the scene description file and the component files reside and a client computer on which the presentation engine is executed. The client computer can access the server computer via a network connection, e.g. via the Internet.
- Content is regarded of value and may be protected by a conditional access system.
- a conditional access system allows usage of content in conformance with the rights that the user has obtained for that content. This means that certain component files may be accessed by certain users and not by certain other users.
- the conditional access system that has control over the file verifies the current user rights and only supplies the file if those rights allow that.
- the component file may be encrypted and a decryption key is necessary to properly reproduce the content. The conditional access system will then supply that key if the user rights allow this.
- the file itself may be freely available to everyone, since it is of no use as long as the decryption key is not available.
- This object is achieved according to the invention in an apparatus comprising: retrieval means for retrieving a scene description, the scene description including a component identification, identifying a component comprising content for the scene, and a conditional access identification, for determining access rights to the component; conditional access determining means for determining the access rights to the component; and presenting means for presenting the scene including the content of the component in conformance with the access rights. Due to the fact that the conditional access identification of a given component is included in the scene description, the user rights to the content of that component can be determined without accessing the component itself or its multiplex.
- the fact that the user rights to a component can be directly established when parsing the scene description is advantageous because the presentation can immediately be adapted if it appears that a component's content is not available.
- Such adaptation may be replacing the intended content of the component by a stub, re-positioning other components, scaling other components to fill a larger part of the screen, or disguising the missing of content in some other way.
- the advantage of the apparatus according to the invention is that such adaptation can be done without having to obtain the conditional access identification of the component from outside the scene description.
- an embodiment of the apparatus according to the invention is described in claim 2.
- the apparatus can operate with more than one conditional access system. Different scene descriptions and constituent components may then be protected by different conditional access systems, while they still may be presented on the apparatus according to the invention.
- An embodiment of the apparatus according to the invention is described in claim 3.
- An embodiment of the apparatus according to the invention is described in claim 4. It is advantageous to have another component available as alternative in case the particular user of the scene description has no (longer) access rights to the original component. The apparatus determines this situation directly by verifying the access rights on the basis of the conditional access identification present in the scene description and subsequently decides to retrieve the alternative component. An example of this is where the original component is a high resolution image protected by conditional access rights and the further component is a freely available image in lower resolution.
- This object is achieved according to the invention in a method comprising the steps of: retrieving a scene description, the scene description including a component identification, identifying a component comprising content for the scene, and a conditional access identification, for determining access rights to the component; determining the access rights to the component; and presenting the scene including the content of the component in conformance with the access rights. Since the conditional access identification of a given component is available from the scene description itself, any actions based on the presence or absence of access rights can be immediately taken. This avoids consulting the component at some possibly remote location or consulting the multiplex of the component..
- This object is achieved according to the invention in a computer program product loadable into the internal memory of a digital computer, comprising software code portions for executing the steps of the method according to the invention when said product is run on the digital computer.
- a program may be obtained in the local computer by downloading it via a network connection from a remote computer having the program available on its storage devices. This process of downloading may be the process of storing the program on a local storage device, from where it can be loaded for later execution, or the process of loading the program into the memory of the local computer for immediate execution.
- the program may be obtained by retrieving it from a storage medium carrying the program, which storage medium has been purchased for this purpose.
- This object is achieved according to the invention in an apparatus comprising: description means for preparing a scene description, the scene description including a first component identification, identifying a first component comprising content for the scene, and a conditional access identification, for determining access rights to the first component; and output means for outputting the scene description in the form of a computer program product.
- This object is achieved according to the invention in a method comprising the steps of: preparing a scene description, the scene description including a first component identification, identifying a first component comprising content for the scene, and a conditional access identification, for determining access rights to the first component; and outputting the scene description in the form of a computer program product.
- Figure 1 schematically shows an apparatus for presenting a scene according to the invention
- Figure 2 schematically shows an apparatus for producing a scene description according to the invention.
- FIG. 1 schematically shows an apparatus for presenting a scene according to the invention.
- the apparatus 100 is implemented according to a known computer architecture.
- the apparatus has a processor 102 for carrying out the machine instructions of a program loaded into working memory 104.
- the system further has an interface 106 for communication with peripheral devices.
- the peripheral devices of the apparatus include a storage medium 110 containing the program to be executed.
- the storage medium 110 may be a hard disk or any other suitable medium, like an optical disk, a chip card or a tape.
- the program may be downloaded via a network connection 112.
- the peripheral devices of the apparatus further include a display 114 for, among other things, displaying the images of the scene and speakers 116 for playing the audio of the scene. Furthermore, the apparatus has an input device 118, e.g. a keyboard, for the user to enter commands.
- a display 114 for, among other things, displaying the images of the scene and speakers 116 for playing the audio of the scene.
- the apparatus has an input device 118, e.g. a keyboard, for the user to enter commands.
- the apparatus is capable of performing various functions which are realized by respective software modules. These software modules are part of the program that is loaded into working memory 104 when the apparatus is activated by a user.
- the apparatus has a first retrieval module 120 for retrieving the scene description of the scene that is to be presented and a conditional access module 122 for determining the access rights of the various components of the scene description.
- the apparatus has a second retrieval module 124 for retrieving the components that are necessary according to the scene description.
- the apparatus also has a presentation module 126 to actually present the content of the scene description and of the retrieved components.
- There are various ways to distribute the functions over the various software modules and the distribution described above is just one example. It is for instance possible to combine the first retrieval module and the second retrieval module into one module capable of retrieving both the scene description and the various components.
- the scene description and the components reside on a remote server computer 128 to which the apparatus is connected via network connection 130.
- This server has a storage device 132 containing scene description files, e.g. scene description file 134, and component files, e.g. component file 136 and component file 138.
- the example scene description contains a first component identification 140, identifying a first component whose content is to be retrieved and included in the scene, and a second component identification 142, identifying a second component whose content is to be retrieved and included in the scene.
- the scene description contains for the first component a conditional access identification 144, identifying the first component for the conditional access system.
- the operation of apparatus 100 is as follows.
- the software modules 120-126 are loaded into the memory 104, whereby not all modules need to be loaded initially but loading may be postponed until needed for some of them.
- the first retrieval module 120 retrieves the scene description 134 from server 128.
- the scene description it is determined that the content of component 'CMPT is part of the content of the scene.
- the content of 'CMP 1' is protected and that it has the conditional access identification 144. So it appears that access to the component is under control of the conditional access system 'CA1' and that the component is identified in that system by number '123'.
- the conditional access module 122 determines the access rights to the first component 136 on the basis of this information. If the access rights allow, the second retrieval module 124 retrieves the first component 136 from the server 128. If the access rights do not allow access, the first component is not retrieved and the apparatus may take an appropriate action to cope with this situation, e.g. replacing it by an alternative component or rearranging the other components in the scene.
- the fact that the access rights can be established on the basis of information in the scene description itself makes it possible to decide on such corrective actions without delay and without consulting other sources for finding the conditional access identification. In a system where the conditional access identification is available at the level of the server, e.g.
- SMIL 1.0 The scene description in the embodiment of the invention is prepared according to the SMIL 1.0 specification.
- This multimedia language is defined by the World Wide Web Consortium (SMIL 1.0 Specification, REC-smil-19980615).
- SMIL World Wide Web Consortium
- the conditional access identification of a component can easily be represented by a dedicated test attribute that SMIL allows to be added to a component.
- SMIL has a ⁇ switch> element that allows the selection between two components on the basis of the evaluation of the test attribute.
- Section 4.3 of the SMIL 1.0 Specification describes the ⁇ switch> element and section 4.4 of the SMIL 1.0 Specification describes the test attribute.
- the presentation engine knows that there are access rights to the audio 1 component and retrieves this component for play back. If the first test attribute system-access-id evaluates to false, there are no access rights and the audio 1 -replacement component is retrieved.
- FIG. 2 schematically shows an apparatus for producing a scene description according to the invention.
- the apparatus 200 is implemented according to a similar architecture as apparatus 100.
- the apparatus 200 has a description module 202 for preparing a scene description 134.
- This scene description contains a first component identification 140, identifying a first component whose content is part of the scene, and a second component identification 142, identifying a second component whose content is part of the scene.
- the scene description contains for the first component a conditional access identification 144, identifying the first component for the conditional access system.
- the apparatus 200 further has an outputting module 204 for outputting the prepared scene description.
- the outputted scene description may be sent via a network connection to another computer, where it may be executed or stored.
- the outputted scene description may be stored on a local storage medium, e.g. on storage medium 110.
- the scene description contains the specification of a scene. It describes what is to be presented and how this is to be presented. In that respect, it contains instructions for the presentation program regarding the presentation to be made.
- the presentation engine parses the scene description in a way that is similar to an interpreter parsing a file with program instructions. Therefore, it can be said that the scene description can be executed on a computer that is loaded with the appropriate presentation program.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00993833A EP1171812A1 (en) | 1999-12-24 | 2000-12-11 | Method and system for controlling access to components of a multimedia scene |
JP2001568162A JP2003527704A (en) | 1999-12-24 | 2000-12-11 | Apparatus and method for displaying scene |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP99204541 | 1999-12-24 | ||
EP99204541.9 | 1999-12-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001069350A1 true WO2001069350A1 (en) | 2001-09-20 |
Family
ID=8241097
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2000/012541 WO2001069350A1 (en) | 1999-12-24 | 2000-12-11 | Method and system for controlling access to components of a multimedia scene |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1171812A1 (en) |
JP (1) | JP2003527704A (en) |
KR (1) | KR100781907B1 (en) |
CN (1) | CN1304913C (en) |
WO (1) | WO2001069350A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1335600A2 (en) * | 2002-02-08 | 2003-08-13 | NTT DoCoMo, Inc. | Information delivery system and method, content delivery server and client terminal |
WO2009130173A1 (en) * | 2008-04-23 | 2009-10-29 | Streamezzo | Method of securing a changing scene, corresponding device, signal and computer program, method of updating a changing scene, corresponding device and computer program |
US8566949B2 (en) | 2006-12-12 | 2013-10-22 | Kabushiki Kaisha Toshiba | Software component, software component management method, and software component management system |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4705324B2 (en) * | 2003-12-26 | 2011-06-22 | 富士通株式会社 | Data operation method |
CN101222371B (en) * | 2008-01-24 | 2012-08-22 | 中国海洋大学 | Client terminal component operation management system |
CN105389364B (en) * | 2015-11-06 | 2020-02-04 | 中国科学院自动化研究所 | Digital cultural relic safety sharing system |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0649261A2 (en) * | 1993-10-18 | 1995-04-19 | Canon Kabushiki Kaisha | Image data processing and encrypting apparatus |
WO1998025373A2 (en) * | 1996-11-21 | 1998-06-11 | Intellectual Protocols, L.L.C. | Web site copy protection system and method |
WO1998058306A1 (en) * | 1997-06-17 | 1998-12-23 | Shopnow.Com Inc. | Method and system for securely incorporating electronic information into an online purchasing application |
EP0969668A2 (en) * | 1998-06-29 | 2000-01-05 | Canon Kabushiki Kaisha | Copyright protection for moving image data |
-
2000
- 2000-12-11 EP EP00993833A patent/EP1171812A1/en not_active Withdrawn
- 2000-12-11 JP JP2001568162A patent/JP2003527704A/en not_active Withdrawn
- 2000-12-11 WO PCT/EP2000/012541 patent/WO2001069350A1/en active Application Filing
- 2000-12-11 CN CNB008067155A patent/CN1304913C/en not_active Expired - Fee Related
- 2000-12-11 KR KR1020017010828A patent/KR100781907B1/en not_active IP Right Cessation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0649261A2 (en) * | 1993-10-18 | 1995-04-19 | Canon Kabushiki Kaisha | Image data processing and encrypting apparatus |
WO1998025373A2 (en) * | 1996-11-21 | 1998-06-11 | Intellectual Protocols, L.L.C. | Web site copy protection system and method |
WO1998058306A1 (en) * | 1997-06-17 | 1998-12-23 | Shopnow.Com Inc. | Method and system for securely incorporating electronic information into an online purchasing application |
EP0969668A2 (en) * | 1998-06-29 | 2000-01-05 | Canon Kabushiki Kaisha | Copyright protection for moving image data |
Non-Patent Citations (1)
Title |
---|
REALNETWORKS: "Authoring content for RealPlayer 7", REALNETWORKS TECHNICAL BLUEPRINT SERIES, 29 October 1999 (1999-10-29), pages 10 - 12, XP002163894, Retrieved from the Internet <URL:http://docs.real.com/docs/devzone/realplayer71.pdf> [retrieved on 20010320] * |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1335600A2 (en) * | 2002-02-08 | 2003-08-13 | NTT DoCoMo, Inc. | Information delivery system and method, content delivery server and client terminal |
EP1335600A3 (en) * | 2002-02-08 | 2007-12-05 | NTT DoCoMo, Inc. | Information delivery system and method, content delivery server and client terminal |
EP2003894A1 (en) * | 2002-02-08 | 2008-12-17 | NTT DoCoMo, Inc. | Information delivery system and method, content delivery server and client terminal |
US7844624B2 (en) | 2002-02-08 | 2010-11-30 | Ntt Docomo, Inc. | Information delivery system, information delivery method, information delivery server, content delivery server and client terminal |
US8566949B2 (en) | 2006-12-12 | 2013-10-22 | Kabushiki Kaisha Toshiba | Software component, software component management method, and software component management system |
WO2009130173A1 (en) * | 2008-04-23 | 2009-10-29 | Streamezzo | Method of securing a changing scene, corresponding device, signal and computer program, method of updating a changing scene, corresponding device and computer program |
FR2930662A1 (en) * | 2008-04-23 | 2009-10-30 | Streamezzo Sa | METHOD OF SECURING AN EVOLVING SCENE, DEVICE, SIGNAL AND CORRESPONDING COMPUTER PROGRAM, METHOD OF UPDATING AN EVOLUTIVE SCENE, CORRESPONDING DEVICE AND COMPUTER PROGRAM |
US20110093915A1 (en) * | 2008-04-23 | 2011-04-21 | Streamezzo | Method of securing a changing scene, corresponding device, signal and computer program, method of updating a changing scene, corresponding device and computer program |
US8533816B2 (en) | 2008-04-23 | 2013-09-10 | Streamezzo | Method of securing a changing scene, corresponding device, signal and computer program, method of updating a changing scene, corresponding device and computer program |
Also Published As
Publication number | Publication date |
---|---|
EP1171812A1 (en) | 2002-01-16 |
JP2003527704A (en) | 2003-09-16 |
KR20010113711A (en) | 2001-12-28 |
CN1304913C (en) | 2007-03-14 |
CN1364249A (en) | 2002-08-14 |
KR100781907B1 (en) | 2007-12-04 |
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