CN101584213B - Transmission and reception apparatuses and methods used in terrestrial dmb conditional access system - Google Patents
Transmission and reception apparatuses and methods used in terrestrial dmb conditional access system Download PDFInfo
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- CN101584213B CN101584213B CN2007800500513A CN200780050051A CN101584213B CN 101584213 B CN101584213 B CN 101584213B CN 2007800500513 A CN2007800500513 A CN 2007800500513A CN 200780050051 A CN200780050051 A CN 200780050051A CN 101584213 B CN101584213 B CN 101584213B
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- 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
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- 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
- H04N21/266—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel
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- 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
- H04H60/23—Arrangements for conditional access to broadcast information or to broadcast-related services using cryptography, e.g. encryption, authentication, key distribution
-
- 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
- H04N21/24—Monitoring of processes or resources, e.g. monitoring of server load, available bandwidth, upstream requests
- H04N21/2408—Monitoring of the upstream path of the transmission network, e.g. client requests
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- 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
- H04N21/258—Client or end-user data management, e.g. managing client capabilities, user preferences or demographics, processing of multiple end-users preferences to derive collaborative data
- H04N21/25866—Management of end-user data
- H04N21/25891—Management of end-user data being end-user preferences
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- 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
- H04N21/266—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel
- H04N21/26606—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel for generating or managing entitlement messages, e.g. Entitlement Control Message [ECM] or Entitlement Management Message [EMM]
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- 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
- H04N21/4623—Processing of entitlement messages, e.g. ECM [Entitlement Control Message] or EMM [Entitlement Management Message]
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- 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]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/61—Network physical structure; Signal processing
- H04N21/6106—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network
- H04N21/6112—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network involving terrestrial transmission, e.g. DVB-T
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- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H2201/00—Aspects of broadcast communication
- H04H2201/10—Aspects of broadcast communication characterised by the type of broadcast system
- H04H2201/11—Aspects of broadcast communication characterised by the type of broadcast system digital multimedia broadcasting [DMB]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H2201/00—Aspects of broadcast communication
- H04H2201/10—Aspects of broadcast communication characterised by the type of broadcast system
- H04H2201/20—Aspects of broadcast communication characterised by the type of broadcast system digital audio broadcasting [DAB]
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- 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
- H04H60/15—Arrangements for conditional access to broadcast information or to broadcast-related services on receiving information
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- 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
- H04H60/19—Arrangements for conditional access to broadcast information or to broadcast-related services on transmission of information
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Databases & Information Systems (AREA)
- Computer Security & Cryptography (AREA)
- Theoretical Computer Science (AREA)
- Computer Graphics (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
Provided are transmission and reception apparatuses and methods used in a conditional access system that limitedly allows access to a terrestrial digital multimedia broadcasting (T-DMB) service. The transmission apparatus selects a single service component from a transmission frame which includes a main service channel (MSC) including sub-channels including one or more service components and a fast information channel (FIC) which transmits control information regarding the main service channel to insert an entitlement management message (EMM) that is used to grant or update the entitlement on the DMB service to the selected single service component, and provides location information regarding the selected single service component to the fast information channel.
Description
Technical field
The present invention relates to a kind of transmission and receiving equipment and method of in the conditional access system (conditional access system) of the visit that allows to serve, using for T-DMB (T-DMB) limitedly, and more specifically, relate to a kind of transmission and the method for reseptance and equipment that can reduce the expense that transmits bit rate by the entitlement management message (EMM) that transmits and receive the T-DMB conditional access system effectively.
Background technology
Conditional access system be to the original broadcast signal carry out conversion, make can be only to having the system that this broadcast program is provided about the receiver of the right of corresponding broadcast program.In the case, conversion original broadcast signal is so that can not provide broadcasting to be called as scrambling to undelegated receiver, and the key that is used for scrambling is called as control word.
At first, described T-DMB (T-DMB) conditional access standard in ETSI EN 300 401 Vl.3.3 parts 9, this is that a kind of T-DMB transmits standard.In the case, there is following problem:, and in multimedia object transmission (MOT) pattern, do not support conditional access fully according to the realization complexity of ETSI EN 300 401 Vl.3.3 parts 9.Therefore, a kind of new standard ETSI TS 102 367 Vl.2.1 have been introduced.Yet this new conditional access standard and traditional conditional access standard and ETSI EN 300 401 Vl.3.3 standards are incompatible, however with the ETSIEN 300 401 Vl.4.1 operating suchs of in June, 2006 revision.
Summary of the invention
Technical problem
According to T-DMB conditional access standard (ETSI TS 102 367 Vl.2.1),, must provide described conditional access inside story to each serviced component of wanting scrambling with singleton (ensemble) in order to transmit the conditional access inside story.Must provide the using ECM that comprises the control word corresponding (ECM) to each serviced component of wanting scrambling with the scrambling key.Yet when repeatedly when each serviced component provides entitlement management message (EMM), the expense that transmits bit rate increases.In addition, when to single serviced component and EMM is not provided and will transmits when not having the serviced component of EMM to the user to each serviced component, the user can not receive EMM, and making to provide normal service.
As under unduplicated situation, transmit the method for EMM, used a kind ofly to be used for to the method (not having the transmission of payload) of fast information group (FIG) type 6 or No. 63 delivery of subchannel EMM or a kind ofly to be used at EMM private subchannel delivery EMM and to notify the method for the position of EMM private subchannel by the conditional access bulk properties field of FIG type 6 to the serviced component of wanting scrambling.Yet have following problem: described two kinds of methods are with incompatible as the ETSI TS 102 367 Vl.2.1 standards of new T-DMB conditional access standard.
Technical scheme
According to an aspect of the present invention, a kind of transfer equipment in the conditional access system of the visit that allows to serve for T-DMB is provided limitedly, described transfer equipment comprises: the insertion position selector, be used for selecting single serviced component from the transmission frame that comprises main service channel and fast information channel in dab receiver, described main service channel comprises the subchannel that comprises one or more serviced components, and described fast information channel in dab receiver transmits the control information of relevant main service channel; Entitlement management message is inserted the unit, is used for inserting the entitlement management message that is used to authorize or upgrade the right of serving about T-DMB to selected single serviced component; And the insertion position provides device, is used for providing to fast information channel in dab receiver the positional information of relevant selected single serviced component.
According to a further aspect in the invention, a kind of transfer approach that uses in the conditional access system of the visit that allows to serve for T-DMB is provided limitedly, described transfer approach comprises: (a) select single serviced component from the transmission frame that comprises main service channel and fast information channel in dab receiver, described main service channel comprises the subchannel that comprises one or more serviced components, and described fast information channel in dab receiver transmits the control information of relevant main service channel; (b) insert the entitlement management message that is used to authorize or upgrade the right of serving to selected single serviced component about T-DMB; And the positional information that relevant selected single serviced component (c) is provided to fast information channel in dab receiver.
According to a further aspect in the invention, a kind of method of reseptance that uses in the conditional access system of the visit that allows to serve for T-DMB (T-DMB) is provided limitedly, described method of reseptance comprises: (a) receive the received frame that comprises main service channel and fast information channel in dab receiver, described main service channel comprises the subchannel that comprises one or more serviced components, and described fast information channel in dab receiver transmits the control information of relevant main service channel; (b) obtain the relevant positional information that is used to authorize or upgrade the entitlement management message of the right of serving from fast information channel in dab receiver about T-DMB; And, come to extract entitlement management message from main service channel (c) by using the positional information of being obtained.
Beneficial effect
Correspondingly, do not insert the EMM of T-DMB conditional access system to each serviced component of wanting scrambling, but, only insert EMM, the feasible expense that can reduce according to the transmission bit rate of conditional access services to the single serviced component of wanting scrambling.
Description of drawings
By describing example embodiment of the present invention with reference to the accompanying drawings in detail, of the present invention above and other feature and advantage will become more obvious, wherein:
Figure 1A and Figure 1B are the views that illustrates according to the structure of the transmission frame embodiment of the invention, T-DMB (T-DMB) and transportation protocol;
Fig. 2 is the view that illustrates according to the structure of the T-DMB conditional access system of the embodiment of the invention;
Fig. 3 is the view that illustrates according to the structure of the transfer equipment in the T-DMB conditional access system of the embodiment of the invention;
Fig. 4 A is the view that illustrates according to the data structure of fast information group (FIG) type 6 embodiment of the invention, that transmit entitlement management message (EMM) positional information to Fig. 4 C;
Fig. 5 is the flow chart according to the transfer approach that uses in the T-DMB conditional access system of the embodiment of the invention;
Fig. 6 is the view that illustrates according to the structure of the receiving equipment in the T-DMB conditional access system of the embodiment of the invention;
Fig. 7 is the flow chart according to the method for reseptance that uses in the T-DMB conditional access system of the embodiment of the invention; And
Fig. 8 is the flow chart that is used for extracting and handling by the receiving equipment of T-DMB conditional access system the method for using ECM (ECM) and EMM according to the embodiment of the invention.
Embodiment
Fig. 3 is the view that illustrates according to the structure of the transfer equipment in the T-DMB conditional access system of the embodiment of the invention.
With reference to figure 3, the transfer equipment of current embodiment comprises according to the present invention: insertion position selector 310, entitlement management message insert unit 320 and the insertion position provides device 330.By means of previous constructions, transfer equipment is inserted into EMM and EMM positional information in the transmission frame that will transmit.
Selection has the serviced component conduct of high frequency of utilization to the single serviced component that wherein inserts EMM.This can increase the efficient of terminal.When EMM is sent to the serviced component with low frequency of utilization, wherein must in terminal, handle serviced component that provides to the subscriber in the practice and the serviced component that comprises EMM simultaneously (promptly, two serviced components) situation frequently takes place, and this may cause the deterioration of end use efficiency and power consumption etc.
As the method that is used to measure frequency of utilization, for example, there is a kind of method of when serviced component is charged, based on charge subscriber's number, measuring frequency of utilization.In addition, there be a kind of being used for by using audient (audience) measurement Research to measure the method for frequency of utilization.
Entitlement management message is inserted unit 320 and EMM is inserted into the single serviced component of being selected by insertion position selector 310., be identified for EMM is inserted into method in the selected serviced component to the scope (that is) of selected serviced component scrambling according to wherein according to the conditional access mode of selected serviced component.
When coming that with sub-channel mode (CAMode 420 is " 000 ") selected serviced component carried out scrambling, promptly, when the conditional access mode of selected serviced component is sub-channel mode, EMM is inserted in sub-channel conditional access prefix (SUBCAPrefix) field of the subchannel that selected serviced component belongs to.
SUBCAPrefix is used for transmitting the conditional access inside story to the mark lead-in section of the subchannel of arranging before scrambled content.
When coming selected serviced component is carried out scrambling (promptly with data set pattern (CAMode 420 is " 001 ") or with MOT pattern (CAMode 420 is " 010 "), the conditional access mode of selected serviced component is in data set pattern or MOT pattern) time, EMM is inserted in the MSC data set data field.
When not being inserted into EMM in the assigned address, EMM is inserted into each serviced component that in MSC 130, comprises.
The insertion position provides device 330 to deliver the information that is used to indicate to the position of the serviced component that wherein inserts EMM in the FIC 120 that transmits frame.
The insertion position provides device 330 to use CAIntChar field in the FIG type 6 among the FIC 120 as the position that is used to transmit the EMM positional information.CAIntChar field condition of transmitting visit bulk properties, such as, be used for the version of the conditional access system of conditional access services, applied algorithm, system's special parameter, channel id, length information etc.
Fig. 5 is the flow chart according to the transfer approach that uses in the T-DMB conditional access system of the embodiment of the invention.
With reference to figure 5, comprise the operation of carrying out in chronological order by the illustrated transfer equipment of Fig. 3 according to the transfer approach of present embodiment.Therefore, the aforementioned description of the illustrated transfer equipment of Fig. 3 can be applied to transfer approach according to present embodiment.
At first, among the one or more serviced components that among the MSC 130 (referring to Figure 1A and 1B) that transmits frame, comprise, select single serviced component (operation S510).Selection has the serviced component conduct of high frequency of utilization to the single serviced component that wherein inserts EMM.
Then, EMM is inserted into (operation S520) in the serviced component of in operation S510, selecting.EMM is inserted in the SUBCAPrefix field of the subchannel that this serviced component belongs to or the method in the MSC data set data field is used as according to the scope (that is the conditional access mode of selected serviced component) of wherein selected serviced component being carried out scrambling EMM is inserted into method in the selected serviced component.When not being inserted into EMM in the assigned address, EMM is inserted in each serviced component that comprises in MSC130.
The positional information of the relevant serviced component of in operation S510, selecting of delivery (operation S530) in the FIC 120 (referring to Figure 1A and 1B) that transmits frame.As the position of the transmission EMM positional information among the FIC 120, use the CAIntChar field in the FIG type 6.According to the conditional access mode of serviced component, the EMM positional information is subchannel identifier or subchannel identifier and service component identifier.
Fig. 6 is the view that illustrates according to the structure of the receiving equipment in the T-DMB conditional access system of the embodiment of the invention.
With reference to figure 6, the receiving equipment of current embodiment comprises according to the present invention: EMM position acquiring unit 610 and EMM extractor 620.By means of this structure, receiving equipment extracts EMM from received frame, and obtains the right of serviced component from EMM, make can be after receiving equipment provides scrambling serviced component.
EMM position acquiring unit 610 obtains the positional information of the relevant EMM that inserts from the FIC 120 (referring to Figure 1A and 1B) of received frame.The CAIntChar field of FIG type 6 is used as the position that comprises the EMM positional information among the FIC 120.Receiving equipment comes condition of acceptance visit bulk properties by the CAIntChar field in the FIG type 6, such as, be used for the version of the conditional access system of conditional access services, applied algorithm, system's special parameter, channel id, length information etc.
If as the conditional access mode (CAMode) the 420th by the indicated serviced component of the EMM positional information the EMM positional information of obtaining from the CAIntChar field of FIG type 6, sub-channel mode (" 000 ") is then extracted SubChId 410.If the CAMode 420 by the indicated serviced component of EMM positional information is data set pattern (" 001 ") or MOT pattern (" 010 "), then extract SubChId 410 and SCId 430.
EMM extractor 620 comes the MSC 130 (referring to Figure 1A and 1B) from received frame to extract EMM by using the positional information of being obtained by EMM position acquiring unit 610.If the CAMode 420 by the serviced component of EMM positional information indication is in sub-channel mode (" 000 "), then from extracting EMM by the SUBCAPrefix field of the subchannel of SubChId 410 indications.When the CAMode 420 by the serviced component of EMM positional information indication is in data set pattern (" 001 ") or MOT pattern (" 010 "), from MSC data set data field, extract EMM by the serviced component of SubChId 410 and SCId 430 indications.
When the positional information of being obtained by EMM position acquiring unit 610 (for example has predetermined value that representative wherein only is not inserted into EMM the state in the single serviced component, " 11111111 ") time, EMM extractor 620 extracts EMM from each serviced component that comprises among MSC 130.
Fig. 7 is the flow chart according to the method for reseptance that uses in the T-DMB conditional access system of the embodiment of the invention.
With reference to figure 7, comprise the operation of carrying out in chronological order by the illustrated receiving equipment of Fig. 6 according to the method for reseptance of current embodiment.Therefore, the aforementioned description of the illustrated receiving equipment of Fig. 6 can be applied to method of reseptance according to present embodiment.
At first, receive the received frame (operation S700) that comprises MSC 130 and FIC 120.
From the FIC 120 (referring to Figure 1A and 1B) of the received frame that receives the S700 in operation, obtain the relevant positional information (operating S710) that has been inserted into the serviced component of EMM.As among the FIC 120 to the position of wherein inserting the EMM positional information, use the CAIntChar field of FIG type 6.CAMode 420 according to by the indicated serviced component of the EMM positional information the EMM positional information of obtaining from the CAIntChar field of FIG type 6 extracts SubChId 410, or extracts SubChId410 and SCId 430.
Then, by using the positional information of the relevant serviced component that in operation S710, obtains, come to extract EMM from the MSC 130 (referring to Fig. 1) of received frame.CAMode 420 according to the serviced component of indicating by the EMM positional information, come from extracting EMM, perhaps extract EMM from MSC data set data field by the serviced component of SubChId 410 that is extracted and SCId 430 indications by the SUBCAPrefix field of the subchannel of SubChId 410 indications of being extracted.
When the positional information of obtaining among the S710 in operation has representative when wherein EMM only not being inserted into the value of the state in the single serviced component, extract EMM from each serviced component that among MSC 130, comprises.
The invention pattern
Figure 1A and 1B are the views that illustrates according to the structure of the transmission frame embodiment of the invention, T-DMB (T-DMB) and transportation protocol.
With reference to Figure 1A, the transmission frame (aggregated frame) of T-DMB comprising: synchronizing channel 110, fast information channel in dab receiver (FIC) 120 and main service channel (MSC) 130.
Synchronizing channel 110 comprises the information that is used for synchronous each transmission frame.
MSC 130 comprises a plurality of subchannels, and each subchannel comprises one or more serviced components.MSC 130 transmission and payload and conditional access inside story (such as, entitlement management message (EMM) and using ECM (ECM)) corresponding DMB content.
According to the characteristic of serviced component, be classified to broadcast data to T-DMB carry out multiplexed, and finally it is carried out multiplexed having the singleton frame type, thereby transmit.In the conditional access standard, classification and characteristic according to the corresponding with service assembly, come preference pattern from three kinds of conditional access mode transmitting (MOT) pattern as sub-channel mode, data set pattern and multimedia object, so that this pattern is applied to conditional access.
With reference to Figure 1B, the sub-channel mode indication is carried out scrambling to all subchannels of MSC 130.More specifically, the audio frequency subchannel 131, group mode subchannel 132 and the stream mode sub-channel 133 that comprise program associated data (PAD) 135 are carried out scrambling.
The indication of data set pattern is carried out scrambling to the MSC data set 140 that transmits by group mode subchannel 132 or PAD 135.To carry out scrambling to mark the data that first pattern 142, Internet Protocol (IP) tunnelling 143 and transparent data channel (TDC) 144 transmit by MOT directory pattern 141, MOT.
The indication of MOT pattern comes a part or all objects are carried out scrambling with the structure of MOT directory pattern 141.
Fig. 2 is the view that illustrates according to the structure of the T-DMB conditional access system of the embodiment of the invention.
With reference to figure 2, the transmitter of T-DMB conditional access system comprises: conditional access message coding device 210, control word generator 220, synchronizer 230, scrambler 240 and set multiplexer 250.Receiver comprises: demultiplexer 260, conditional access message decoder 270, synchronizer 280 and descrambler 290.
Conditional access message coding device 210 generates ECM and EMM.
ECM comprises encrypted control word.Periodically transmit ECM for safety, and, new control word is encrypted in each transmission place.
EMM is used to authorize or upgrade the right of serving about T-DMB.
As mentioned above, the message that is generated by conditional access message coding device 210 is called as conditional access inside story (CAIntMessage).
230 pairs of scrambling operations of synchronizer and control word transfer operation are carried out synchronously.Transmit the control word that generates by control word generator 220 through synchronizer 230 to scrambler 240 and conditional access message coding device 210.In addition, formation condition access synchronized parameter (CASyncParam), with allow to carry out by receiver, message is decoded and that content is carried out the operation of descrambling is synchronized with each other.Triggering (toggle) signal that the indication control word has changed is the call parameter among the CASyncParam.
250 pairs of contents of multiplexer, the conditional access inside story that generates by conditional access message coding device 210 by scrambler 240 scramblings and undertaken by the synchronization parameter that synchronizer 230 generates multiplexed, thereby generate the singleton frame.
Conditional access message decoder 270 is analyzed the conditional access system inside story that receives from demultiplexer 260, thereby enforcement of rights management, right inspection and control word are disposed.
Fig. 8 extracts and handles the flow chart of the method for ECM and EMM according to the embodiment of the invention, being used to of using in the receiving equipment of T-DMB conditional access system.
With reference to figure 8, receive the frame (operation S800) that comprises MSC 130 and FIC 120.
Determine in the CAIntChar field of the FIG of received frame type 6, whether there is the EMM positional information (operation S810).
If there is no CAIntChar field or do not have relevant information to the assigned address that wherein inserts EMM then is extracted in the ECM and the EMM (operation S820) that comprise in the serviced component that expectation receives.
If in the CAIntChar field, there is relevant information, then in buffer, store relevant information (operation S830) to the assigned address that wherein inserts EMM to the assigned address that wherein inserts EMM.
Extraction is inserted into the EMM in the assigned address, and if in buffer, do not have identical EMM, then in buffer, store this EMM (operation S840).
The serviced component that receives from expectation extracts ECM, and is extracted in the EMM that stores in the buffer, together to use with ECM, makes desired serviced component by descrambling and (operation S850) can normally be provided.
Claims (19)
1. the transfer equipment in the conditional access system, described conditional access system allows the visit for T-DMB (T-DMB) service limitedly, and described transfer equipment comprises:
The insertion position selector, be used for selecting single serviced component from the transmission frame that comprises main service channel and fast information channel in dab receiver, described main service channel comprises the subchannel that comprises one or more serviced components, and described fast information channel in dab receiver transmits the control information of relevant main service channel;
Entitlement management message is inserted the unit, is used for inserting the entitlement management message that is used to authorize or upgrade the right of serving about T-DMB to selected single serviced component; And
The insertion position provides device, is used for providing to fast information channel in dab receiver the positional information of relevant selected single serviced component,
Wherein, described entitlement management message is inserted the unit is used to limit the right of selected single serviced component according to representative the conditional access mode of scope, inserts entitlement management message.
2. according to the equipment of claim 1, wherein said insertion position selector is selected single serviced component based on the frequency of utilization of the serviced component that comprises in main service channel.
3. according to the equipment of claim 2, wherein one or more based in the subscriber's of the serviced component that comprises in main service channel number and the audience measurement research measure described frequency of utilization.
4. according to the equipment of claim 1, wherein, if described conditional access mode is in sub-channel mode, then described entitlement management message is inserted the unit entitlement management message is inserted in the conditional access prefix of the subchannel of arranging selected single serviced component thereon, and described insertion position provides device to be provided for the identifier and the conditional access mode of subchannel to fast information channel in dab receiver.
5. according to the equipment of claim 1, wherein, if described conditional access mode is in the data set pattern, then described entitlement management message is inserted the unit entitlement management message is inserted in the main service channel data set data field of selected single serviced component, and described insertion position provides identifier, the conditional access mode of device is provided for arranging selected single serviced component thereon to fast information channel in dab receiver subchannel and is used for the identifier of selected single serviced component.
6. according to the equipment of claim 1, wherein, if described conditional access mode is in the multimedia object transmission mode, then described entitlement management message is inserted the unit entitlement management message is inserted in the main service channel data set data field of selected single serviced component, and described insertion position provides identifier, the conditional access mode of device is provided for arranging selected single serviced component thereon to fast information channel in dab receiver subchannel and is used for the identifier of selected single serviced component.
7. according to the equipment of claim 1, wherein, if do not select single serviced component, then described managing entitlement inserts the unit entitlement management message is inserted in each serviced component that comprises in main service channel, and described insertion position provides device to provide representative wherein not select the value of the state of single serviced component to fast information channel in dab receiver.
8. transfer approach that in the conditional access system that allows for the visit of T-DMB service, uses limitedly, described transfer approach comprises:
(a) select single serviced component from the transmission frame that comprises main service channel and fast information channel in dab receiver, described main service channel comprises the subchannel that comprises one or more serviced components, and described fast information channel in dab receiver transmits the control information of relevant main service channel;
(b) insert the entitlement management message that is used to authorize or upgrade the right of serving to selected single serviced component about T-DMB; And
(c) provide the positional information of relevant selected single serviced component to fast information channel in dab receiver,
Wherein, in step (b), be used to limit the conditional access mode of scope of the right of selected single serviced component according to representative, insert entitlement management message.
9. method according to Claim 8 wherein in step (a), is selected single serviced component based on the frequency of utilization of the serviced component that comprises in main service channel.
10. according to the method for claim 9, wherein measure described frequency of utilization based on one or more in subscriber's number of serviced component and the audience measurement research.
11. method according to Claim 8, wherein, if described conditional access mode is in sub-channel mode, then in step (b), entitlement management message is inserted in the conditional access prefix of the subchannel of arranging selected single serviced component thereon, and in step (c), be provided for the identifier and the conditional access mode of subchannel to fast information channel in dab receiver.
12. method according to Claim 8, wherein, if described conditional access mode is in the data set pattern, then in step (b), entitlement management message is inserted in the main service channel data set data field of selected single serviced component, and in step (c), be provided for arranging thereon to fast information channel in dab receiver selected single serviced component subchannel identifier, conditional access mode and be used for the identifier of selected single serviced component.
13. method according to Claim 8, wherein, if described conditional access mode is in the multimedia object transmission mode, then in step (b), entitlement management message is inserted in the main service channel data set data field of selected single serviced component, and in step (c), be provided for arranging thereon to fast information channel in dab receiver selected single serviced component subchannel identifier, conditional access mode and be used for the identifier of selected single serviced component.
14. method according to Claim 8, wherein, if do not select single serviced component, then in step (b), entitlement management message is inserted in each serviced component that comprises in main service channel, and in step (c), provide representative wherein not select the value of the state of single serviced component to fast information channel in dab receiver.
15. a method of reseptance that uses in the conditional access system of the visit that allows to serve for T-DMB (T-DMB) limitedly, described method of reseptance comprises:
(a) receive the received frame that comprises main service channel and fast information channel in dab receiver, described main service channel comprises the subchannel that comprises one or more serviced components, and described fast information channel in dab receiver transmits the control information of relevant main service channel;
(b) obtain the positional information of relevant entitlement management message from fast information channel in dab receiver, this entitlement management message is used to authorize or upgrades right about the T-DMB service; And
(c) by using the positional information of being obtained, come to extract entitlement management message from main service channel,
Wherein, in step (a), come from the position of the positional information extraction serviced component that is obtained according to conditional access mode, described conditional access mode representative is used to limit the scope to the right of the serviced component that wherein inserts entitlement management message.
16. method according to claim 15, wherein, if described conditional access mode is in sub-channel mode, then in step (b), extract the subchannel identifier from the positional information of being obtained, and in step (c), from conditional access prefix, extract entitlement management message by the subchannel of the subchannel identifier that extracted indication.
17. method according to claim 15, wherein, if described conditional access mode is in the data set pattern, then in step (b), extract identifier that is used for subchannel and the identifier that is used for serviced component from the positional information of being obtained, and in step (c), from main service channel data set data field, extract entitlement management message by the subchannel identifier that is extracted and the serviced component of the service component identifier indication of being extracted.
18. method according to claim 15, wherein, if described conditional access mode is in the multimedia object transmission mode, then in step (b), extract subchannel identifier and service component identifier from the positional information of being obtained, and in step (c), from main service channel data set data field, extract entitlement management message by the serviced component of the subchannel identifier that is extracted and service component identifier indication.
19. method according to claim 15, wherein in step (c), represent the value of not inserting the state of entitlement management message if in step (b), extracted, then extract entitlement management message from each serviced component that main service channel, comprises to single serviced component.
Applications Claiming Priority (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2006-0130447 | 2006-12-19 | ||
| KR20060130447 | 2006-12-19 | ||
| KR1020060130447 | 2006-12-19 | ||
| KR1020070046633 | 2007-05-14 | ||
| KR1020070046633A KR100848326B1 (en) | 2006-12-19 | 2007-05-14 | Apparatus and Method for transmitting/receiving data in terrestrial DMB conditional access system |
| KR10-2007-0046633 | 2007-05-14 | ||
| PCT/KR2007/005172 WO2008075832A1 (en) | 2006-12-19 | 2007-10-22 | Transmission and reception apparatuses and methods used in terrestrial dmb conditional access system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101584213A CN101584213A (en) | 2009-11-18 |
| CN101584213B true CN101584213B (en) | 2011-05-11 |
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| CN2007800500513A Expired - Fee Related CN101584213B (en) | 2006-12-19 | 2007-10-22 | Transmission and reception apparatuses and methods used in terrestrial dmb conditional access system |
Country Status (4)
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| EP (1) | EP2095639A4 (en) |
| KR (1) | KR100848326B1 (en) |
| CN (1) | CN101584213B (en) |
| WO (1) | WO2008075832A1 (en) |
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| KR100972029B1 (en) * | 2008-10-07 | 2010-07-22 | 한국전자통신연구원 | Transmitting and receiving method and apparatus of providing conditional access broadcasting services |
| KR101531269B1 (en) | 2009-02-19 | 2015-06-25 | 삼성전자주식회사 | Digital transmission apparatus and method, and digital reception apparatus |
| KR101418293B1 (en) * | 2011-12-29 | 2014-07-11 | 전자부품연구원 | Hybrid broadcasting system using data communication in local area |
| US9904645B2 (en) * | 2014-10-31 | 2018-02-27 | Texas Instruments Incorporated | Multicore bus architecture with non-blocking high performance transaction credit system |
| WO2016153274A1 (en) * | 2015-03-23 | 2016-09-29 | 엘지전자 주식회사 | Broadcasting signal transmission device, broadcasting signal reception device, broadcasting signal transmission method, and broadcasting signal reception method |
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| CN1720733A (en) * | 2002-12-03 | 2006-01-11 | 纳格拉卡德股份有限公司 | Method of managing the display of event specifications with conditional access |
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| FR2835371B1 (en) * | 2002-01-31 | 2004-04-16 | Viaccess Sa | METHOD AND DEVICE FOR TRANSMITTING ACCESS MESSAGE MANAGEMENT MESSAGE |
| DE10212656A1 (en) * | 2002-03-21 | 2003-10-02 | Scm Microsystems Gmbh | Selective encryption of multimedia data |
| EP1353501A1 (en) * | 2002-04-11 | 2003-10-15 | Nagravision SA | Pre-pay television system |
| CN1778062A (en) * | 2003-04-21 | 2006-05-24 | Rgb网络有限公司 | Time-multiplexed multi-program encryption system |
| KR100547810B1 (en) * | 2003-08-27 | 2006-01-31 | 삼성전자주식회사 | Digital multimedia broadcasting receiving device and method capable of playing digital multimedia data |
| US7383438B2 (en) * | 2004-12-18 | 2008-06-03 | Comcast Cable Holdings, Llc | System and method for secure conditional access download and reconfiguration |
| KR20050016722A (en) * | 2005-01-06 | 2005-02-21 | 삼성전자주식회사 | Digital multimedia broadcasting conditional acess system and method thereof |
| KR20060110420A (en) * | 2005-04-19 | 2006-10-25 | 삼성전자주식회사 | Apparatus and method for offering broadcast service in a dmb system having single frequency network |
| KR101153640B1 (en) * | 2005-05-04 | 2012-06-18 | 삼성전자주식회사 | Digital multimedia broadcasting conditional acess system and method thereof |
-
2007
- 2007-05-14 KR KR1020070046633A patent/KR100848326B1/en not_active IP Right Cessation
- 2007-10-22 WO PCT/KR2007/005172 patent/WO2008075832A1/en active Application Filing
- 2007-10-22 CN CN2007800500513A patent/CN101584213B/en not_active Expired - Fee Related
- 2007-10-22 EP EP07833481A patent/EP2095639A4/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1340272A (en) * | 1999-12-22 | 2002-03-13 | 耶德托存取公司 | Method for controlling the use of a program signal in a broadcast system, and control device for a receiver for carrying out such a method |
| CN1720733A (en) * | 2002-12-03 | 2006-01-11 | 纳格拉卡德股份有限公司 | Method of managing the display of event specifications with conditional access |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2095639A1 (en) | 2009-09-02 |
| EP2095639A4 (en) | 2011-05-18 |
| WO2008075832A1 (en) | 2008-06-26 |
| CN101584213A (en) | 2009-11-18 |
| KR100848326B1 (en) | 2008-07-24 |
| KR20080057125A (en) | 2008-06-24 |
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