WO2006083137A1 - Procede destine a generer des informations de regles d'usage pour un canal de diffusion - Google Patents

Procede destine a generer des informations de regles d'usage pour un canal de diffusion Download PDF

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Publication number
WO2006083137A1
WO2006083137A1 PCT/KR2006/000418 KR2006000418W WO2006083137A1 WO 2006083137 A1 WO2006083137 A1 WO 2006083137A1 KR 2006000418 W KR2006000418 W KR 2006000418W WO 2006083137 A1 WO2006083137 A1 WO 2006083137A1
Authority
WO
WIPO (PCT)
Prior art keywords
content
usage rule
rule information
broadcast
control information
Prior art date
Application number
PCT/KR2006/000418
Other languages
English (en)
Inventor
Myung-Sun Kim
Young-Sun Yoon
Sung-Hyu Han
Sun-Nam Lee
Jae-Heung Lee
Bong-Seon Kim
Original Assignee
Samsung Electronics Co., 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
Priority claimed from KR1020050024086A external-priority patent/KR100739702B1/ko
Application filed by Samsung Electronics Co., Ltd. filed Critical Samsung Electronics Co., Ltd.
Priority to JP2007554018A priority Critical patent/JP4838268B2/ja
Priority to EP06715870A priority patent/EP1849097A4/fr
Priority to CN2006800042807A priority patent/CN101116071B/zh
Publication of WO2006083137A1 publication Critical patent/WO2006083137A1/fr

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Classifications

    • 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]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/435—Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream
    • 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]
    • G06F21/107—License processing; Key processing
    • G06F21/1073—Conversion
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
    • G11B27/28—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording
    • G11B27/32—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on separate auxiliary tracks of the same or an auxiliary record carrier
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/09—Arrangements for device control with a direct linkage to broadcast information or to broadcast space-time; Arrangements for control of broadcast-related services
    • H04H60/14—Arrangements for conditional access to broadcast information or to broadcast-related services
    • H04H60/18—Arrangements for conditional access to broadcast information or to broadcast-related services on copying information
    • 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
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/235—Processing of additional data, e.g. scrambling of additional data or processing content descriptors
    • 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]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/4104—Peripherals receiving signals from specially adapted client devices
    • H04N21/4135—Peripherals receiving signals from specially adapted client devices external recorder
    • 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]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
    • H04N21/4348—Demultiplexing of additional data and video streams
    • 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]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
    • H04N21/43615—Interfacing a Home Network, e.g. for connecting the client to a plurality of peripherals
    • 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]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
    • H04N21/462—Content or additional data management, e.g. creating a master electronic program guide from data received from the Internet and a Head-end, controlling the complexity of a video stream by scaling the resolution or bit-rate based on the client capabilities
    • H04N21/4627—Rights management associated to the content
    • 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
    • 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
    • H04N21/8355—Generation of protective data, e.g. certificates involving usage data, e.g. number of copies or viewings allowed
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/91—Television signal processing therefor
    • H04N5/913—Television signal processing therefor for scrambling ; for copy protection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/162—Authorising the user terminal, e.g. by paying; Registering the use of a subscription channel, e.g. billing
    • H04N7/165—Centralised control of user terminal ; Registering at central
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/91—Television signal processing therefor
    • H04N5/913—Television signal processing therefor for scrambling ; for copy protection
    • H04N2005/91307—Television signal processing therefor for scrambling ; for copy protection by adding a copy protection signal to the video signal
    • H04N2005/91328—Television signal processing therefor for scrambling ; for copy protection by adding a copy protection signal to the video signal the copy protection signal being a copy management signal, e.g. a copy generation management signal [CGMS]

Definitions

  • Methods consistent with the present invention relate to generating usage rule information, and more particularly, to generating usage rule information for controlling the use of content imported via a broadcast channel.
  • a content provider transmits digital content to a user.
  • Digital content must be protected so that only a user who pays to acquire a right to use the digital content can use the digital content.
  • FIG. 1 illustrates a home network.
  • a content provider CP transmits content 110 and copy control bits 112 to a home network HN via a transmission channel CH .
  • the home network HN includes a home server HS and user devices Dl, D2, and D3.
  • the copy control bits 112 specify restrictions on the use of content. If the transmission channel CH is a broadcast channel, the copy control bits 112 may be copy control information (CCI) specifying whether the content is 'copy free', 'copy once', 'copy no more', or 'copy never'.
  • CCI copy control information
  • the home server HS uses the content according to the restrictions on the use of content specified by the copy control bits 112. For instance, the home server HS does not allow 'copy once' content stored in a device to be transferred to another device.
  • a home server should change copy control bits received from the outside according to the way in which a user uses the content in a home network, and in this case, the content must be kept properly protected.
  • FCC requires a standard for digital broadcasting technology that prescribes that a one -bit broadcast flag (BF) be included in high-definition (HD) content which is to be broadcast as a digital broadcast throughout the U.S.A.. Further, the US FCC standard requires that content protection be enabled when the BF of content is one, so that unauthorized users cannot use the content. Therefore, there is an urgent need for usage rule information supporting various uses of content while guaranteeing secure use of digital broadcast content between a home server and a user device. Disclosure of Invention
  • the present invention provides a method of generating usage rule information supporting various uses of different content while guaranteeing secure use of content imported via a broadcast channel.
  • the exemplary embodiment of the present invention provides a method of generating usage rule information for distribution of content imported via a broadcast channel, i.e., content controlled using a BF or CCI.
  • a broadcast channel i.e., content controlled using a BF or CCI.
  • FIG. 1 is a diagram illustrating a conventional home network
  • FIG. 2 illustrates a flow of content according to an exemplary embodiment of the present invention
  • FIG. 3 A is a block diagram of a DRM system supporting a method of generating usage rule information according to an exemplary embodiment of the present invention
  • FIG. 3B is an apparatus which receives broadcast content according to an exemplary embodiment of the present invention
  • FIG. 4 is a table illustrating whether BF's are mapped to usage rule information according to an exemplary embodiment of the present invention
  • FIG. 5 is a table illustrating whether CCI is mapped to usage rule information according to an exemplary embodiment of the present invention
  • FIG. 5 is a table illustrating whether CCI is mapped to usage rule information according to an exemplary embodiment of the present invention
  • FIG. 6 illustrates the syntax of a license containing usage rule information accordi ng to an exemplary embodiment of the present invention
  • FIG. 7 is a flowchart of a method of generating usage rule information when copy control bits correspond to a BF according to an exemplary embodiment of the present invention
  • FIG. 8 is a flowchart of a method of generating usage rule information when copy control bits correspond to CCI according to another exemplary embodiment of the present invention.
  • a method of generating usage rule information for a broadcast channel comprising receiving content and a broadcast flag via the broadcast channel; creating content usage rule information to allow all operations relating to use of the content when the broadcast flag is off; and creating usage rule information to forbid copying of the content when the broadcast flag is on.
  • the method further includes when a user inputs a command indicating that the content is to be copied to a destination device, performing proximity checking on the destination device and determining whether copying of the content is to be allowed.
  • performing proximity checking on the destination device and determining whether copying of the content is to be allowed comprises measuring a time-to-live time between the destination device and a home server by transmitting a test packet from the home server to the destination device, and comparing the time- to-live time with a predetermined threshold to determine whether the destination device passes proximity checking.
  • a method of generating usage rule information for a broadcast channel including receiving content and copy control information via the broadcast channel; creating usage rule information to allow only real-time reproduction and storing of the content when the copy control information indicates that the content is 'copy once'; changing the usage rule information to allow one or more of a stored play operation, a moving operation, a migrating operation, an exporting operation, and an editing operation for editing the content to be performed after one of real-time reproduction and storing of the content is completed.
  • the method further includes creating usage rule information allowing only the realtime reproduction of the content when the copy control information indicates that the content is 'copy never', and when the user inputs a command indicating that the content is to be exported, determining whether exporting of the content is to be performed depending on whether an object of exporting is a protocol for real-time reproduction.
  • a DRM system allows a user to use content while abiding by usage rules and protects digital content imported to the user's home via a variety of different channels.
  • a method of generating usage rule information applicable to the DRM system, particularly, for content imported via a broadcast channel, will be described. First, technical usage models will be described.
  • the exemplary embodiment of the present invention adopts one of two different types of usage models depending on a content source.
  • One of the usage models is a terrestrial channel. Content imported via the terrestrial channel is accompanied by a BF having a value of zero or one.
  • the U.S. FCC requires a standard for digital broadcasting technology that prescribes that a one-bit BF be included in HD content to be broadcast as a digital broadcast throughout the U.S.A., and that content protection be enabled when the BF of content is one so that unauthorized users cannot use the content.
  • the other usage model is a cable channel. Content imported via the cable channel is accompanied by CCI which specifies whether the content is 'copy free', 'copy once',
  • the detected BF or CCI of the content is used to reproduce usage rule information.
  • a home server in a home network creates the usage rule information based on the BF or the CCI.
  • a technique of detecting CCIVBF bits does not fall within the scope of the present invention and thus will not be described.
  • DRM system of an exemplary embodiment of the present invention are as follows: [33] (1) Create usage rule information regarding imported content.
  • Edit content e.g., create or divide the content, or combine the content with other content.
  • the DRM system manages the use of content by various entities according to restrictions and permissions given by a content provider.
  • the DRM system creates usage rule information using BF/CCI bits, and translates the usage rule information and limits use of the content based on the translated usage rule information when an entity accesses the content.
  • Entities related to use of content according to the DRM system of an exemplary embodiment of the present invention are as follows:
  • Content provider An entity that broadcasts a BF or CCI to a user.
  • Device An entity, e.g., consumer electronic devices such as a personal computer
  • the DRM system is applicable to a wide variety of devices ranging from offline-tethered devices to Internet-enabled devices with a large capacity.
  • DRM System An entity that governs a user's use of content and is deployed in compatible devices.
  • the DRM system creates usage rule information, enables domain management, and performs device revocation.
  • FIG. 2 illustrates a flow of content according to an exemplary embodiment of the present invention.
  • Content broadcast to a user is packaged with usage restrictions.
  • Usage restrictions for terrestrial content are provided in the form of a BF
  • usage restrictions for cable content are provided in the form of CCI.
  • a DRM system When a device detects BF/CCI bits, a DRM system according to an exemplary embodiment of the present invention translates the BF/CCI bits into a rights object.
  • the rights object includes the BF/CCI bits and further includes binding information of content, for example, that the content is bound to a user.
  • the rights object controls the overall use and consumption of the content.
  • a user of a domain may add as many devices to the domain as allowed. Also, the user may remove a device from the domain.
  • the content When content is transmitted, the content is bound to a designated user according to the DRM system unless the content violates compliance rules. In this way, the designated user can make use of the content using a device in the domain. However, if the use of the content violates the compliance rules, the content must be bound to the device.
  • the DRM system determines whether the content can be streamed, stored, and copied based on the usage rule information.
  • the DRM system allows content not only to be migrated to other domains but also to be exported to different DRM systems. There is no need to modify the format of content or usage rule information for migration, since they can be interpreted directly. However, the format of content or usage rule information for exportation must be modified properly.
  • the user may edit content to an extent permitted by the usage rule information. If permitted, the user can divide the content into pieces, and each piece of the content contains its related usage rule information.
  • the DRM system generates usage rule in- formation for each piece of the content.
  • the DRM system allows only authenticated users or devices to access the content.
  • the DRM system has information on revoking the devices. Hacked devices are not permitted to access the content protected in the domain since the content is protected using the revocation information.
  • the DRM system provides a renewal mechanism. Renewal of revocation information is guaranteed through synchronization of information between two devices under control of the domain.
  • FIG. 3A is a block diagram of a DRM system supporting a method of generating usage rule information according to an exemplary embodiment of the present invention.
  • FIG. 3B is an apparatus which receives broadcast content according to an exemplary embodiment of the present invention.
  • a method of generating usage rule information according to an exemplary embodiment of the present invention is expected to support the followings operations:
  • a DRM system does not limit the type of device that can play content for the following two cases:
  • [61] - Reproduction of content stored in a device, such as a set-top box (STB) with a hard disk drive (HDD), in a domain (stored playing).
  • STB set-top box
  • HDD hard disk drive
  • a user can store content if storage is allowed by usage rule information.
  • the DRM system creates usage rule information bound to the content.
  • the content is bound to a user if this is allowed; otherwise, the content is bound to a device.
  • there is an operation for automatically storing content which supports time shifting enabled by a content receiver such as a STB.
  • a time limit for the operation is determined according to compliance rules and should conform to the compliance rules. After the time limit passes, the stored content must be completely removed from a storage unit of the STB.
  • the DRM system allows the user to share content between devices belonging to the user's domain. Since the content is stored together with its usage rule information, it is possible to determine whether the content can be copied. Alternatively, the DRM system may force a source device to check whether a sink device is located close enough to the source device before the content is transmitted from the source device to the sink device.
  • the DRM system can allow a user to move content from one device to another device.
  • content there are two types of content: movable content and immovable content.
  • a source device may verify whether a sink device is an authorized device through proximity checking for movement of the content.
  • Some content can be copied from a domain to another domain to which another user belongs. Migration is allowed depending on usage rule information regarding the content. Alternatively, a revocation key protects the content from hacked devices or incompatible devices. To allow interoperability between Marlin DRM implementations, content must be packaged such that the content can be imported by Marlin DRM implementations without additional effort.
  • Content can be exported to other DRM systems or technologies for content protection such as content protection for removable media (CPRM) and digital transmission content protection (DTCP).
  • CPRM content protection for removable media
  • DTCP digital transmission content protection
  • usage rule information regarding content may further specify whether the content can be exported.
  • the DRM system according to an exemplary embodiment of the present invention guarantees that content remains protected during exporting of the content.
  • the DRM system allows a user to edit stored content. Content newly generated by editing is assigned separate usage rule information.
  • a method of generating usage rule information supporting the above operations will be described.
  • a user may create a domain and share content between devices belonging to the domain. In the domain, the user may reproduce, store, copy, or move content within an allowed range . If the user wants to transfer content to another domain, the user must perform a migration operation on the content. To transfer content to a domain governed by a DRM system different to that adopted by an exemplary embodiment of the present invention, the user must perform an exporting operation on the content. The user may become a content provider who creates, edits, and provides the content.
  • a license is allocated to each piece of content, which includes usage rule information for the content.
  • the usage rule information describes constraints on the use of the content.
  • Copy control bits can be used to limit the use of content. Copy control bits are referred to as a BF in the case of a terrestrial channel, and referred to as CCI in a case of the cable channel or a physical medium.
  • the exemplary embodiment of the present invention supports a method of generating usage rule information for content imported via a broadcast channel.
  • a broadcast receiver 10 receives a broadcast signal which contains usage control information of the broadcast content.
  • the usage control information of the broadcast content is mapped to the usage rule information.
  • a license generator 20 then transforms the usage control information into usage rule information.
  • a license which contains content binding information corresponding to the usage control information is then generated.
  • a storage unit 30 stores the broadcast content and the license.
  • FIG. 4 is a table illustrating whether BF's are mapped to usage rule information according to an exemplary embodiment of the present invention.
  • usage rule information puts restrictions on the operations of live play, stored play, storing, copying, moving, migrating, exporting, and editing of content which have been described with reference to FIG. 3.
  • whether the above operations are allowed is indicated using 'O' and 'X'.
  • copy control bits correspond to a BF
  • the usage rule information is created to permit all the above operations except the copying operation.
  • the BF is used to prevent content from being unlimitedly redistributed, and thus, all the above operations except the copying operation are allowed.
  • Whether the copying operation will be allowed is determined by checking whether a position of content is adjacent to a destination to which the content is to be copied through proximity checking.
  • the BF does not define usage rule information of the content in detail, since use of a BF is to prevent content from being redistributed without limitation. Further, redistribution of the content to a certain extent is allowed. Proximity checking is performed through measurement of a time-to-live time (TTL) or a round trip time (RTT) and a comparison of the measurement with a threshold.
  • TTL time-to-live time
  • RTT round trip time
  • FIG. 5 is a table illustrating whether CCI is mapped to usage rule information according to an exemplary embodiment of the present invention. [83] If copy control bits correspond to CCI, whether the above operations will be allowed is determined by the type of the CCI.
  • [91] The operations of moving, migrating, exporting, and editing are allowed, since movement of 'copy no more' content in a domain is permitted when at least a piece of content exists in the domain.
  • the usage rule information should be created to realize the DRM system according to an exemplary embodiment of the present invention to allow movement of content to a domain governed by a different DRM system, for example, reproduce the content in another apparatus using the DTCP.
  • FIGS. 4 and 5 do not include a table illustrating whether usage rule information is mapped to the importing operation.
  • a table illustrating whether usage rule information is mapped to the importing operation is not included because the generation of usage rule information illustrated in FIGS. 4 and 5 is included in the operation of importing, since the operation of importing is to receive content from the outside. That is, that the usage rule information illustrated in FIGS. 4 and 5 is generated means that the importing operation has already been allowed.
  • FIG. 6 illustrates the syntax of a license containing usage rule information according to an exemplary embodiment of the present invention.
  • the usage rule information is contained in the license and controls the use of content.
  • a domain manager in a home server extracts usage rule information from the license and limits the use of the content according to the usage rule information.
  • an item 'BYTE Permissions' presents whether the above operations are permitted, i.e., it shows the usage rule information.
  • the format of the syntax illustrated in FIG. 6 is a common license template to simplify a process and reduce load on a system.
  • the common license template consists of a constraint part and a description part.
  • FIG. 7 is a flowchart of a method of generating usage rule information when copy control bits correspond to a BF according to an exemplary embodiment of the present invention.
  • a home server or a domain manager in the home server receives content and the BF from an external channel.
  • operation 720 when the BF is off, the usage rule information is made to allow all the above operations including the operation of live play.
  • Operation 740 when a user inputs a command that instructs the content to be copied to a destination device, proximity checking is performed to find the distance between the position of content and the destination device. Operation 740 includes operations 742 and 744.
  • the home server measures a TTL between the destination device and the home server by transmitting a test packet to the destination device.
  • the TTL may be replaced with an RTT.
  • the home server compares the TTL measured in operation 742 with a predetermined threshold to determine whether the destination device passes proximity checking. If the TTL is less than the predetermined threshold, it is determined that the target device passes proximity checking.
  • the threshold is determined within an allowed range of distributing the content, e.g., a physical range of a home network. Since a main purpose of proximity checking is to prevent distribution of content unlimitedly, a range of the predetermined proximity threshold does not significantly affect authentication. For instance, it is possible to prevent unlimited distribution of content by limiting the physical scope of the home network to that of an apartment complex and determining the threshold RTT to be 7ms.
  • the home server performs copying of the content.
  • the home server rejects copying of the content and discontinues the method.
  • FIG. 8 is a flowchart of a method of generating usage rule information when copy control bits correspond to CCI according to an exemplary embodiment of the present invention.
  • a home server or a domain manager in the home server receives content and CCI via an external channel in operation 810.
  • operation 830 after the content is reproduced in real time or stored, the usage rule information made in operation 830 is changed to usage rule information regarding 'copy no more' content in operation 835.
  • the usage rule information is created to allow only the operations of stored play, moving, migrating, exporting, and editing.
  • the home server checks whether an object of exporting is a protocol for realtime reproduction of the content. If the object of exporting is the protocol for real-time reproduction, the method proceeds to operation 870, and otherwise, the method proceeds to operation 880.
  • the protocol for real-time reproduction may be a DTCP. If the object of exporting is a protocol for storing the content in a storage medium such as the CPRM, the method proceeds to operation 880.
  • the 'copy never' restraint is not violated when a device, for example, the home server, which creates usage rule information of content does not reproduce the content and allows a device governed by a different DRM system to reproduce the content using the DTCP, for example, when an STB receiving the content does not reproduce the content, and transmits the content to a DTV using the DTCP and allows the DTV to reproduce the content.
  • a device for example, the home server, which creates usage rule information of content does not reproduce the content and allows a device governed by a different DRM system to reproduce the content using the DTCP, for example, when an STB receiving the content does not reproduce the content, and transmits the content to a DTV using the DTCP and allows the DTV to reproduce the content.
  • transmission (exporting) of the content from the STB to DTV is allowed in this case.
  • the home server performs exporting of the content.
  • the home server rejects exporting of the content and discontinues the method.
  • a method of generating usage rule information according to an exemplary embodiments of the present invention may be embodied as a computer program.
  • Computer programmers in the art could have easily derived codes or code segments of the program.
  • the program may be stored in a computer readable medium, and the method is performed when the program is read and executed using a computer.
  • the computer readable medium may be a magnetic recording medium, an optical recording medium, and a carrier wave medium.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Computer Security & Cryptography (AREA)
  • Databases & Information Systems (AREA)
  • Theoretical Computer Science (AREA)
  • Software Systems (AREA)
  • Technology Law (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Storage Device Security (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

L'invention concerne un procédé destiné à générer des informations de règles d'usage pour un canal de diffusion. Le procédé consiste à recevoir un contenu et un drapeau de diffusion via le canal de diffusion, à créer des informations de règles d'usage du contenu afin de permettre toutes les opérations relatives à l'utilisation du contenu lorsque le drapeau de diffusion est hors tension, et à créer des informations de règles d'usage afin d'empêcher la copie du contenu lorsque le drapeau de diffusion est sous tension.
PCT/KR2006/000418 2005-02-07 2006-02-06 Procede destine a generer des informations de regles d'usage pour un canal de diffusion WO2006083137A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2007554018A JP4838268B2 (ja) 2005-02-07 2006-02-06 放送チャンネルのための使用規則情報の生成方法
EP06715870A EP1849097A4 (fr) 2005-02-07 2006-02-06 Procede destine a generer des informations de regles d'usage pour un canal de diffusion
CN2006800042807A CN101116071B (zh) 2005-02-07 2006-02-06 生成用于广播信道的使用规则信息的方法

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US65012305P 2005-02-07 2005-02-07
US60/650,123 2005-02-07
KR10-2005-0024086 2005-03-23
KR1020050024086A KR100739702B1 (ko) 2005-02-07 2005-03-23 브로드캐스트 채널을 위한 사용 규칙 정보 생성 방법

Publications (1)

Publication Number Publication Date
WO2006083137A1 true WO2006083137A1 (fr) 2006-08-10

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PCT/KR2006/000418 WO2006083137A1 (fr) 2005-02-07 2006-02-06 Procede destine a generer des informations de regles d'usage pour un canal de diffusion

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EP (1) EP1849097A4 (fr)
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012006379A1 (fr) * 2010-07-06 2012-01-12 General Instrument Corporation Procédé et appareil d'enregistrement interdomaines drm

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WO2000050974A2 (fr) * 1999-02-26 2000-08-31 Reveo, Inc. Systemes globalement synchronises dans le temps
EP1033665A2 (fr) * 1999-03-03 2000-09-06 Sony Corporation Système de communication de données et méthode de gestion de données
EP1179919A2 (fr) * 2000-08-04 2002-02-13 Intellon Corporation Protocole de contrôle d'accès au média à intervalles de priorité ou sans collision
WO2003023602A1 (fr) * 2001-09-07 2003-03-20 Ip Flex Inc. Systeme de traitement de donnees et procede de commande

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US8230084B2 (en) * 2002-12-17 2012-07-24 Sony Corporation Network management in a media network environment
WO2005008385A2 (fr) * 2003-07-07 2005-01-27 Cryptography Research, Inc. Securite reprogrammable pour lutter contre le piratage et autoriser l'acces a du contenu interactif

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WO2000050974A2 (fr) * 1999-02-26 2000-08-31 Reveo, Inc. Systemes globalement synchronises dans le temps
EP1033665A2 (fr) * 1999-03-03 2000-09-06 Sony Corporation Système de communication de données et méthode de gestion de données
EP1179919A2 (fr) * 2000-08-04 2002-02-13 Intellon Corporation Protocole de contrôle d'accès au média à intervalles de priorité ou sans collision
WO2003023602A1 (fr) * 2001-09-07 2003-03-20 Ip Flex Inc. Systeme de traitement de donnees et procede de commande

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012006379A1 (fr) * 2010-07-06 2012-01-12 General Instrument Corporation Procédé et appareil d'enregistrement interdomaines drm
US8931059B2 (en) 2010-07-06 2015-01-06 Google & Technology Holdings LLC Method and apparatus for cross DRM domain registration

Also Published As

Publication number Publication date
EP1849097A4 (fr) 2011-06-15
EP1849097A1 (fr) 2007-10-31

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