EP1869881A1 - Method of packaging broadcast contents - Google Patents
Method of packaging broadcast contentsInfo
- Publication number
- EP1869881A1 EP1869881A1 EP06747357A EP06747357A EP1869881A1 EP 1869881 A1 EP1869881 A1 EP 1869881A1 EP 06747357 A EP06747357 A EP 06747357A EP 06747357 A EP06747357 A EP 06747357A EP 1869881 A1 EP1869881 A1 EP 1869881A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- broadcast contents
- stored
- copy control
- control bit
- usage rule
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
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]
- H04N21/80—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
- H04N21/83555—Generation of protective data, e.g. certificates involving usage data, e.g. number of copies or viewings allowed using a structured language for describing usage rules of the content, e.g. REL
-
- 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
- G11B20/00731—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a digital rights management system for enforcing a usage restriction
- G11B20/00746—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 number
- G11B20/00753—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 number wherein the usage restriction limits the number of copies that can be made, e.g. CGMS, SCMS, or CCI flags
- G11B20/00768—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 number wherein the usage restriction limits the number of copies that can be made, e.g. CGMS, SCMS, or CCI flags wherein copy control information is used, e.g. for indicating whether a content may be copied freely, no more, once, or never, by setting CGMS, SCMS, or CCI flags
-
- 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
- G11B20/00746—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 number
- G11B20/00753—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 number wherein the usage restriction limits the number of copies that can be made, e.g. CGMS, SCMS, or CCI flags
- G11B20/00768—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 number wherein the usage restriction limits the number of copies that can be made, e.g. CGMS, SCMS, or CCI flags wherein copy control information is used, e.g. for indicating whether a content may be copied freely, no more, once, or never, by setting CGMS, SCMS, or CCI flags
- G11B20/00775—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 number wherein the usage restriction limits the number of copies that can be made, e.g. CGMS, SCMS, or CCI flags wherein copy control information is used, e.g. for indicating whether a content may be copied freely, no more, once, or never, by setting CGMS, SCMS, or CCI flags wherein said copy control information is encoded in an encryption mode indicator [EMI]
-
- 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
- H04N21/433—Content storage operation, e.g. storage operation in response to a pause request, caching operations
- H04N21/4334—Recording operations
-
- 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
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs
- H04N21/4408—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving video stream encryption, e.g. re-encrypting a decrypted video stream for redistribution in a home network
-
- 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
- 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
- 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]
-
- 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
- H04N2005/91357—Television signal processing therefor for scrambling ; for copy protection by modifying the video signal
- H04N2005/91364—Television signal processing therefor for scrambling ; for copy protection by modifying the video signal the video signal being scrambled
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/16—Analogue secrecy systems; Analogue subscription systems
- H04N7/167—Systems rendering the television signal unintelligible and subsequently intelligible
- H04N7/1675—Providing digital key or authorisation information for generation or regeneration of the scrambling sequence
Definitions
- Methods consistent with the present invention relate to packaging broadcast contents which prevents unauthorized copying of broadcast contents transmitted through a digital broadcast receiver and allows only a device having a corresponding content identification to play back the broadcast contents, thereby protecting the broadcast contents.
- Digital broadcast contents are transmitted from contents providers to users. Users are authorized to use digital broadcast contents only after they obtain the rights to use the digital broadcast contents. Thus, digital broadcast contents must be protected from unauthorized users.
- the U.S. Federal Communications Commission is considering a requirement to add a one-bit broadcast flag (BF) to high definition (HD)-grade contents digitally broadcast within the U.S. to prohibit the indiscriminate redistribution of digital terrestrial broadcast programs.
- the FCC intends to promote the safe use of digital broadcast contents using a technology that prevents unauthorized users from using digital broadcast contents when a BF included in the digital broadcast contents is on.
- FIG. 1 is a conventional table showing operations which are allowed or not allowed according to a BF. Referring to FIG. 1, if a copy control bit included in broadcast contents is a BF, permission to store or copy the broadcast contents is given according to the type of the BF.
- the Open Cable standard is set to become the next-generation cable broadcast standard of the U.S.
- the Open Cable standard makes it compulsory to use copy control information (CCI) to control or restrict the storing or copying of contents received.
- CCI is two-bit control information which controls the copying of cable broadcast contents by indicating 'copy free' (00), 'copy once' (01), 'copy no more' (10), and 'copy never' (11).
- FIG. 2 is another conventional table showing operations which are allowed or not allowed according to CCI. Referring to FIG. 2, if a copy control bit included in broadcast contents is CCI, permission to store and/or copy the broadcast contents is given according to the type of the CCI.
- the present invention provides a method of packaging broadcast contents which prevents unauthorized copying of broadcast contents transmitted through a digital broadcast receiver and allows only a device having a corresponding content identification to play back the broadcast contents, thereby protecting the broadcast contents.
- the unauthorized storing, copying, or redistribution of broadcast contents that are received through a digital broadcast receiver can be prevented using a BF or CCI included in the broadcast contents.
- broadcast contents are packaged using a content identification which will be used as license information when the broadcast contents are decrypted, even if the broadcast contents were copied without authorization, the broadcast contents cannot be played back. Thus, the broadcast contents can be protected more securely.
- FIG. 1 is a conventional table showing operations which are allowed or not allowed according to a BF;
- FIG. 2 is another conventional table showing operations which are allowed or not allowed according to CCI;
- FIG. 3 is a flowchart illustrating a method of packaging broadcast contents according to an exemplary embodiment of the present invention
- FIG. 4 is a flowchart illustrating a method of packaging broadcast contents according to another exemplary embodiment of the present invention.
- FIG. 5 is a flowchart illustrating a method of packaging broadcast contents according to another exemplary embodiment of the present invention.
- FIG. 6 is a flowchart illustrating a method of packaging broadcast contents according to another exemplary embodiment of the present invention.
- FIG. 7 illustrates an example of usage rule information according to an exemplary embodiment of the present invention.
- FIG. 8 illustrates an operation of packaging broadcast contents based on CCI of
- FIG. 7 according to an exemplary embodiment of the present invention.
- a method of packaging broadcast contents including: (a) extracting a copy control bit from input broadcast contents and determining whether the broadcast contents will be stored after being encrypted based on the extracted copy control bit; (b) creating usage rule information which includes an encryption method of the broadcast contents if it is determined that the broadcast contents will be stored after being encrypted; (c) extracting the copy control bit from each new broadcast content sequentially input after operation (a) and detecting broadcast contents which comprise copy control bits indicating that the broadcast contents will be stored without being encrypted; and (d) encrypting the broadcast contents input in operation (a) through the broadcast contents before the broadcast contents detected in operation (c) using the encryption method and packaging and storing the encrypted broadcast contents and the usage rule information.
- a method of packaging broadcast contents including: (a) extracting a copy control bit from input broadcast contents and determining whether the broadcast contents will be stored, and if stored, whether the broadcast contents will be stored after being encrypted based on the extracted copy control bit; (b) creating usage rule information which includes an encryption method of the broadcast contents if it is determined that the broadcast contents will be stored after being encrypted; (c) extracting the copy control bit from each new broadcast content sequentially input after operation (a) and detecting broadcast contents which comprise copy control bits indicating other than characteristics that the broadcast contents will be stored after being encrypted; and (d) encrypting the broadcast contents input in operation (a) through the broadcast contents detected in operation (c) using the encryption method and packaging and storing the encrypted broadcast contents and the usage rule information.
- a method of packaging broadcast contents including: (a) extracting a copy control bit which indicates whether broadcast contents will be stored after being encrypted from each broadcast content sequentially input; (b) detecting whether characteristics of the extracted copy control bit are changed; (c) creating first usage rule information which comprises an encryption method of corresponding broadcast contents if the copy control bit indicates that the broadcast contents will be stored after being encrypted and creating second usage rule information indicating the absence of the encryption method if the copy control bit indicates that the broadcast contents will be stored without being encrypted; and (d) performing operations (a) through (c) on a predetermined number of broadcast contents, and packaging and storing first and second usage rule information created as a result of performing operations (a) through (c), broadcast contents encrypted using the encryption method included in the first usage rule information generated by the broadcast contents, and broadcast contents that generate the second usage rule information.
- a method of packaging broadcast contents including: (a) extracting a copy control bit which indicates whether broadcast contents will be stored and if stored, whether the broadcast contents will be stored after being encrypted from each broadcast content sequentially input; (b) detecting whether characteristics of the extracted copy control bit are changed; (c) creating first usage rule information which comprises an encryption method of corresponding broadcast contents if the copy control bit indicates that the broadcast contents will be stored after being encrypted, creating second usage rule information indicating the absence of the encryption method if the copy control bit indicates that the broadcast contents will be stored without being encrypted, and eliminating the broadcast contents if the copy control bit indicates that the broadcast contents will not be stored; and (d) performing operations (a) through (c) on a predetermined number of broadcast contents, and packaging and storing usage rule information that comprises the first and second usage rule information created as a result of performing operations (a) through (c), broadcast contents encrypted using the encryption method included in the first usage rule information generated by the broadcast contents, and broadcast contents that generate the second usage
- a first source of contents is local channels.
- Contents broadcast on local channels accompany a broadcast flag (BF) as a copy control bit, and the BF is either on or off.
- BF broadcast flag
- the U.S. FCC is considering adding a one-bit BF to high definition (HD)-grade contents digitally broadcast within the U.S.
- the FCC also endeavors to develop a digital broadcasting implementation technology standard, which prevents unauthorized users from using digital broadcast contents when the BF included in the digital broadcast contents is on.
- a second source of contents is cable channels.
- Copy control information accompanies contents broadcast on cable channels.
- CCI includes ' copy free,' 'copy once,' 'copy no more,' and 'copy never.'
- usage rule information is created based on a BF or CCI included in broadcast contents and detected. Since a method of detecting a BF or CCI falls outside the scope of the present invention, its description will be omitted.
- FIG. 3 is a flowchart illustrating a method of packaging broadcast contents according to an exemplary embodiment of the present invention. The method is applied to a case where a copy control bit included in contents that are broadcast on a channel is a BF. Based on the copy control bit, it can be determined whether broadcast contents will be stored after being encrypted or without being encrypted.
- a copy control bit is extracted from input broadcast contents (S300). Based on the copy control bit extracted in operation S300, it is determined whether the broadcast contents will be stored after being encrypted (S310). If it is determined that the broadcast contents will be stored after being encrypted in operation S310, usage rule information that includes an encryption method of the broadcast contents is created (S320). The usage rule information further includes content identification information which will be used as license information when the broadcast contents are decrypted. The usage rule information will be described in more detail later with reference to FIG. 7.
- a copy control bit is extracted from each new broadcast content sequentially input (S330). Then, it is determined whether broadcast contents including copy control bits indicating that the broadcast contents will be stored without being encrypted are detected (S340). If it is determined that the broadcast contents including copy control bits indicating that the broadcast contents will be stored without being encrypted are not detected, operation S330 is re-performed.
- the broadcast contents including copy control bits indicating that the broadcast contents will be stored without being encrypted are detected in operation S340, the broadcast contents including the copy control bits which indicate that the broadcast contents will be stored after being encrypted are encrypted using the encryption method included in the usage rule information created in operation S320 (S350).
- the broadcast contents encrypted in operation S350 and the usage rule information are packaged and stored (S360).
- the usage rule information created in S320 may be packaged and stored in a file and placed before the broadcast contents input in operation S300.
- usage rule information that includes information indicating the absence of the encryption method is created (S325).
- a copy control bit is extracted from each new broadcast content sequentially input after operation S300 (S335).
- the broadcast contents including copy control bits which indicate that the broadcast contents will be stored after being encrypted are detected in operation S345, the broadcast contents including the copy control bits which indicate that the broadcast contents will be stored without being encrypted and the usage rule information are packaged and stored (S365).
- the usage rule information created in S325 may be packaged and stored in a file and placed before the broadcast contents input in operation S300.
- FIG. 4 is a flowchart illustrating a method of packaging broadcast contents according to another exemplary embodiment of the present invention. The method is applied to a case where a copy control bit included in contents that are broadcast on a channel is CCI. Based on a copy control bit, it can be determined whether broadcast contents will be stored and, if stored, whether the broadcast contents will be stored after being encrypted or without being encrypted.
- a copy control bit is extracted from input broadcast contents (S400). Based on the copy control bit extracted in operation S400, it is determined whether the broadcast contents will be stored (S410). If it is determined that the broadcast contents will not be stored, the broadcast contents input in operation S400 are eliminated (S415).
- a copy control bit is extracted from each new broadcast content sequentially input after operation S400 (S440). Then, it is determined whether broadcast contents which include copy control bits indicating characteristics other than the broadcast contents will be stored without being encrypted are detected (S450). If it is determined that the broadcast contents which include copy control bits indicating characteristics other than the broadcast contents will be stored without being encrypted are not detected, operation S440 is re -performed.
- the broadcast contents which include copy control bits indicating characteristics other than the broadcast contents are stored without being encrypted in operation S450, the broadcast contents which include the copy control bits indicating other than the characteristics that the broadcast contents will be stored after being encrypted are encrypted using the encryption method which is included in the usage rule information created in operation S430 (S460).
- the broadcast contents encrypted in operation S430 and the usage rule information are packaged and stored (S470).
- the usage rule information created in S430 may be packaged and stored in a file and placed before the broadcast contents input in operation S400.
- usage rule information that includes information indicating the absence of the encryption method is created (S435).
- a copy control bit is extracted from each new broadcast content sequentially input after operation S400 (S445).
- the broadcast contents which include copy control bits indicating characteristics other than the broadcast contents will be stored without being encrypted are detected in operation S455
- the broadcast contents which include the copy control bits indicating that the broadcast contents will be stored without being encrypted and the usage rule information created in operation S435 are packaged and stored (S475).
- the usage rule information created in S435 may be packaged and stored in a file and placed before the broadcast contents input in operation S400.
- FIG. 5 is a flowchart illustrating a method of packaging broadcast contents according to another exemplary embodiment of the present invention. The method is applied to a case where a copy control bit included in contents that are broadcast on a channel is a BF. Based on a copy control bit, it can be determined whether broadcast contents will be stored after being encrypted or without being encrypted.
- first usage rule information including an encryption method of the broadcast contents is created.
- the first usage rule information further includes content identification information which will be used as license information when the broadcast contents are decrypted. The first usage rule information will be described in more detail later with reference to FIG. 7.
- the broadcast contents are encrypted using the encryption method included in the first usage rule information created in operation S530 (S540). If it is determined that the broadcast contents will be stored without being encrypted in operation S520, second usage information that includes information indicating the absence of the encryption method is created (S535).
- the second usage rule information may further include content identification information. The second usage rule information will be described in more detail later with reference to FIG. 7.
- At least one of the first and second usage rule information, and at least one of the broadcast contents that are encrypted in operation S530 and the broadcast contents that can be stored without being encrypted are packaged and stored (S560).
- the first usage rule information and the second usage rule information may be packaged and stored in one file and placed before the encrypted and unencrypted broadcast contents.
- FIG. 6 is a flowchart illustrating a method of packaging broadcast contents according to another exemplary embodiment of the present invention.
- a copy control bit indicating whether broadcast contents will be stored and whether the broadcast contents will be stored after being encrypted is extracted from each broadcast content sequentially input (S600).
- first usage rule information including an encryption method of the broadcast contents is created (S640).
- the first usage rule information further includes content identification information which will be used as license information when the broadcast contents are decrypted. The first usage rule information will be described in more detail later with reference to FIG. 7.
- the broadcast contents are encrypted using the encryption method included in the first usage rule information created in operation S640 (S650). If it is determined that the broadcast contents will be stored without being encrypted in operation S630, second usage information that includes information indicating the absence of the encryption method is created (S645).
- the second usage rule information may further include content identification information. The second usage rule information will be described in more detail later with reference to FIG. 7.
- FIG. 7 illustrates usage rule information created using the methods of packaging broadcast contents of FIGS. 3 through 6 according to an exemplary embodiment of the present invention.
- a digital broadcasting receiver receives broadcast contents composed of 188-byte transport stream (TS) packets.
- the digital broadcasting receiver also receives a four-byte arrival time stamp, which is a counter value for arranging the TS packets received.
- TS transport stream
- Usage rule information indicates whether a 188-byte TS packet will be stored and, if stored, whether the 188-byte TS packet will be stored after being encrypted.
- the usage rule information is placed before the 188-byte TS packet and includes a 'magic_number,' a 'size_of_UsageRuleInformation,' a 'num_of- sequences,' a 'sequence_start_packet_number,' and a 'SequenceUsageRulelnformation.'
- the 'magic_number' is a grammar indicating the start of a 'UsageRulelnformation'.
- the 'size_of_UsageRuleInformation' indicates the entire size of the 'UsageRulelnformation' including the 'magic_number'.
- the 'num_ of_sequences' is a flag indicating how many packet sequences are included in broadcast contents.
- a packet sequence starts anew when a 'usagerule_information' is changed.
- the 'num_of_sequences' increases.
- the 'num_of_sequences' increases.
- the 'sequence_start_packet_number' indicates a starting number of packet sequences.
- a 'SequenceUsageRulelnformation' includes an 'is_encrypted,' an
- the 'is_encrypted' indicates whether a packet sequence is encrypted.
- the 'is_encrypted' may include 1 bit and may be set to 0x1 indicating 'encryption' and 0x0 indicating 'non-encryption.
- the 'EachStatus_BfCci' indicates a BF or CCI.
- the 'EachStatus_BfCci' may include 3 bits and may be set to 0x000 indicating 'BF off,' to 0x001 indicating 'BF on,' to 0x010 indicating 'copy free,' to 0x011 indicating 'copy once,' to 0x100 indicating 'copy no more,' and to 0x101 indicating 'copy never.
- the 'encryption_scheme' indicates encryption schemes such as AES-128-CBC and AES- 128-CTR.
- the 'encryption_scheme' may include 4 bits.
- the 'encryption_parameters' indicates parameter values used for decryption.
- the 'encryption_parameters' may include 8 bits.
- the 'content_id' is a unique value assigned to each content and used when content identification for a corresponding content is required like a licence.
- the 'Detaillnformation' may include title and duration. Title indicates the title of a packet sequence, and duration indicates the duration of the packet sequence.
- FIG. 7 illustrates only an example of usage rule information according to an exemplary embodiment of the present invention. Thus, terms and their descriptions illustrated in FIG. 7 must not be limited thereto.
- FIG. 8 illustrates an operation of packaging broadcast contents based on the CCI of
- FIG. 7 illustrates a case where a digital broadcast receiver is currently receiving cable broadcast contents.
- a program includes twelve 188-byte TS packets.
- the CCI of the first through fourth TS packets indicates 'copy free,' that of the fifth through eighth TS packets indicates 'copy once,' and that of the ninth through twelfth TS packets indicates 'copy free.
- FIG. 7 can be referred to for other details not described in FIG. 8.
- Operation (A) is repeated for the second through fourth TS packets. Since usage rule information is created in operations (B) through (G), no additional usage rule information is created for the second through fourth TS packets.
- the 'encryption_scheme' is set to an encryption algorithm assigned to the digital broadcast receiver, for example, AES-128-CBC in the present exemplary embodiment.
- the 'sequence_start_packet_number' is set to, for example, TS#5.
- the 'content_id' is set to, for example, B.
- the 'content_id' is set to, for example, C.
- (X) Operation (Q) is repeated for the tenth through twelfth TS packets. Since usage rule information is created in operations (R) through (W), no additional usage rule information is created for the tenth through twelfth TS packets. [98] (Y) The usage rule information created during operations (A) through (X) and the twelve TS packets are added, packaged, and then stored in a predetermined position of a recording medium of the digital broadcast receiver. [99] The operation of packaging broadcast contents when a copy control bit is CCI has been described with reference to FIG. 8. However, the same may be applied to a case where the copy control bit is a BF.
- a case where the BF is off is similar to the case where the CCI is 'copy free' in FIG. 8, and a case where the BF is on is similar to the case where the CCI is 'copy once' in FIG. 8.
- operations (C) and (S) when the BF is off, the 'EachStatus_BfCci' is set to 0x000 indicating the BF being off.
- operation (K) when the BF is on, the
- the present invention can also be implemented as computer-readable code on a computer-readable recording medium.
- the computer-readable recording medium is any data storage device that can store data which can be thereafter read by a computer system. Examples of the computer-readable recording medium include read-only memory (ROM), random-access memory (RAM), CD-ROMs, magnetic tapes, floppy disks, optical data storage devices, and carrier waves (such as data transmission through the Internet).
- the computer-readable recording medium can also be distributed over network- coupled computer systems so that the computer-readable code is stored and executed in a distributed fashion.
- the present invention provides a method of packaging broadcast contents which prevents unauthorized copying of broadcast contents transmitted through a digital broadcast receiver.
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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US67069905P | 2005-04-13 | 2005-04-13 | |
KR1020050062124A KR100823256B1 (en) | 2005-04-13 | 2005-07-11 | Method for packaging of broadcast content |
PCT/KR2006/001362 WO2006110001A1 (en) | 2005-04-13 | 2006-04-13 | Method of packaging broadcast contents |
Publications (2)
Publication Number | Publication Date |
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EP1869881A1 true EP1869881A1 (en) | 2007-12-26 |
EP1869881A4 EP1869881A4 (en) | 2010-12-08 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP06747357A Ceased EP1869881A4 (en) | 2005-04-13 | 2006-04-13 | Method of packaging broadcast contents |
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Country | Link |
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EP (1) | EP1869881A4 (en) |
WO (1) | WO2006110001A1 (en) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
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EP0716544A2 (en) * | 1994-12-08 | 1996-06-12 | Lg Electronics Inc. | Copy prevention method and apparatus of a digital magnetic recording/reproduction system |
EP0924930A2 (en) * | 1997-12-15 | 1999-06-23 | Hitachi, Ltd. | A digital information recording apparatus with copyright protection |
EP0959467A2 (en) * | 1998-05-20 | 1999-11-24 | Sony Corporation | Information processing apparatus, information processing methods and presentation media |
US20030077074A1 (en) * | 2000-12-13 | 2003-04-24 | Hiroo Okamoto | Digital information recording apparatus, reproducing apparatus and transmitting apparatus |
US20030175013A1 (en) * | 2001-07-13 | 2003-09-18 | Motoki Kato | Video information recording apparatus and reproducing apparatus |
EP1471521A1 (en) * | 2002-01-28 | 2004-10-27 | Sony Corporation | Information recording apparatus and method, and information reproduction apparatus and method |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR0166923B1 (en) * | 1995-09-18 | 1999-03-20 | 구자홍 | Method and apparatus of preventing an illegal watching and copying in a digital broadcasting system |
ID22715A (en) * | 1998-03-09 | 1999-12-09 | Matsushita Electric Ind Co Ltd | DIGITAL BROADCAST RECIPIENTS |
JPH11339374A (en) * | 1998-05-26 | 1999-12-10 | Yamaha Corp | Digital recording device |
KR100605825B1 (en) * | 1999-09-14 | 2006-07-31 | 삼성전자주식회사 | A copy protection apparatus and method of a broadcast receiving system having a hdd |
-
2006
- 2006-04-13 WO PCT/KR2006/001362 patent/WO2006110001A1/en active Application Filing
- 2006-04-13 EP EP06747357A patent/EP1869881A4/en not_active Ceased
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0716544A2 (en) * | 1994-12-08 | 1996-06-12 | Lg Electronics Inc. | Copy prevention method and apparatus of a digital magnetic recording/reproduction system |
EP0924930A2 (en) * | 1997-12-15 | 1999-06-23 | Hitachi, Ltd. | A digital information recording apparatus with copyright protection |
EP0959467A2 (en) * | 1998-05-20 | 1999-11-24 | Sony Corporation | Information processing apparatus, information processing methods and presentation media |
US20030077074A1 (en) * | 2000-12-13 | 2003-04-24 | Hiroo Okamoto | Digital information recording apparatus, reproducing apparatus and transmitting apparatus |
US20030175013A1 (en) * | 2001-07-13 | 2003-09-18 | Motoki Kato | Video information recording apparatus and reproducing apparatus |
EP1471521A1 (en) * | 2002-01-28 | 2004-10-27 | Sony Corporation | Information recording apparatus and method, and information reproduction apparatus and method |
Non-Patent Citations (1)
Title |
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See also references of WO2006110001A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP1869881A4 (en) | 2010-12-08 |
WO2006110001A1 (en) | 2006-10-19 |
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