CN107749999B - A kind of digital television conditional access system inside parallel method - Google Patents
A kind of digital television conditional access system inside parallel method Download PDFInfo
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- CN107749999B CN107749999B CN201710894012.7A CN201710894012A CN107749999B CN 107749999 B CN107749999 B CN 107749999B CN 201710894012 A CN201710894012 A CN 201710894012A CN 107749999 B CN107749999 B CN 107749999B
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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
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/236—Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream
- H04N21/2368—Multiplexing of audio 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]
- H04N21/20—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
- H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
- H04N21/2389—Multiplex stream processing, e.g. multiplex stream encrypting
- H04N21/23895—Multiplex stream processing, e.g. multiplex stream encrypting involving multiplex stream encryption
-
- 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]
-
- 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
- H04N21/8352—Generation of protective data, e.g. certificates involving content or source identification data, e.g. Unique Material Identifier [UMID]
-
- 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
-
- 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
- H04N21/85—Assembly of content; Generation of multimedia applications
- H04N21/854—Content authoring
Abstract
The present invention relates to digital television signals to send field, in particular to parallel method inside a kind of digital television conditional access system.Parallel method inside the different CAS functions of different CAS suppliers or " inside is with close " CAS of version can be integrated in the same CAS Server the present invention provides one kind.By the present invention in that controlling segment identification with different ECM segmentation ID() different ECM data are distinguish after be combined together as the CAS data (total Entitlement Control Message frame sequence) of uniform packing, realize the ECM data for generating different CAS functions or version simultaneously in same CAS Server, by sharing the unified interface of PID realization with digital television devices (scrambling machine), in the program encryption function to realize different editions.
Description
Technical field
The present invention relates to digital television signals to send field, in particular to inside a kind of digital television conditional access system simultaneously
Row method.
Background technique
Current digital TV network generally all can deployment conditions receive system (CAS) come guarantee programme information safety and
The legitimate rights and interests of operator.The data flow relevant to channel encryption (authorization encoded information stream ECM) and and terminal conduit that CAS is generated
Relevant data flow (Entitlement Management Message stream EMM) is managed to transmit in a network together with audiovisual frequency in digital TV code stream.At the same time
When the multiple cas systems of installation and deployment, respective itself the independently transmitted related data flow of each cas system；In general, different CAS is produced
Raw data flow is distinguished with different frame identifiers (PID)；The corresponding terminal device of CAS is receiving digital television program
When, other than receiving and handling the audio-video code stream of program, the data flow of cas system generation can be also received and handle,
To complete the decryption and terminal management function of program.Different cas systems have different functional characteristics and algorithm, these features and
Algorithm can be embodied in the data flow of its generation.
Today's society information technology is maked rapid progress, and inevitably be will appear and is carried out function renewal to original cas system
Situation, and update normally result in CAS generate data flow data format and content it is different from legacy version；Update compared with
Greatly, original hardware terminal when adapting to new version, must can not just use simultaneously different cas system services by software upgrading
Device is respectively new and old offering customers service；Namely while being sent for frequent customer using original formatted data stream, for new visitor
The related code stream of family transmission new version.In turn, with the increase of update, while the cas system clothes of the different editions run
Business device may also will increase；This can not only increase substantially the operation cost of operator, meanwhile, actually headend equipment is (as added
Disturb machine) it is also impossible to the unconfined increase for supporting input port, these factors all can cause the maintenance work of service provider to be difficult to
For after.
Summary of the invention
It is an object of the invention to overcome generally use in the prior art different cas system servers individually generate it is specific
CAS code stream, and then cause operator's O&M cost increase the problem of, provide one kind in a CAS Server, generate simultaneously
Parallel method comprising different editions CAS code stream.
In order to achieve the above-mentioned object of the invention, the present invention provides following technical schemes:
A kind of digital television conditional access system inside parallel method, comprises the following steps:
Receive scrambled control word；The scrambled control word is usually generated by scrambling machine；
In conjunction with the scrambled control word, authorization control letter is generated respectively according at least two Entitlement Control Message create-rules
It ceases (ECM)；Condition receiving system (CAS) type that the quantity of Entitlement Control Message create-rule and server need to complete or
Version quantity is related, such as can be a kind, 2 kinds or a variety of；Itself either identical conditions receive system different editions, can also
To be the condition receiving system of entirely different type.
Corresponding control segment identification is respectively set for every kind of Entitlement Control Message；The control segment identification is generally preferable
The initial position of each Entitlement Control Message is set；The control segment identification usually with a kind of Entitlement Control Message create-rule
It corresponds；That is, can uniquely determine the Entitlement Control Message by the control segment identification is believed by any authorization control
Create-rule is ceased to generate.
Various Entitlement Control Message groups are become into total Entitlement Control Message frame sequence, and unified control frame identification is set.
Various Entitlement Control Messages are formed total Entitlement Control Message frame sequence usually can be by TS(Transport Stream, transport stream)
It completes, can also be completed in other ad hoc steps when encapsulation；In a preferred approach, control can be equipped with using by each
The sequentially connected mode of the Entitlement Control Message of segment identification forms total Entitlement Control Message frame sequence.
Further, further include following steps:
Receive terminal management instruction；The terminal management information can usually be generated by subscriber management system (SMS)；
It is instructed in conjunction with the terminal management, generates empowerment management respectively according at least two Entitlement Management Message create-rules
Information (EMM)；Condition receiving system (CAS) type that the quantity of Entitlement Management Message create-rule and server need to complete or
Person's version quantity is related, such as can be a kind, 2 kinds or a variety of；Itself either identical conditions receive system different editions,
It can be the condition receiving system of entirely different type.
Management segment identification is respectively set for every kind of Entitlement Management Message；The generally preferable setting of the management segment identification exists
The initial position of each Entitlement Management Message；But according to special setting, also can be set in end position；Management segmentation
Mark is usually corresponded with a kind of Entitlement Management Message create-rule；That is, can be uniquely determined by the management segment identification
The Entitlement Management Message is generated by any Entitlement Management Message create-rule.
Various Entitlement Management Message groups are become into total Entitlement Management Message frame sequence, and unified management frame identification is set；
Various Entitlement Management Messages are formed total Entitlement Management Message frame sequence usually can be by TS(Transport Stream, transport stream)
It completes, can also be completed in other ad hoc steps when encapsulation；In a preferred approach, management can be equipped with using by each
The sequentially connected mode of the Entitlement Management Message of segment identification forms total Entitlement Management Message frame sequence.
Further, the terminal management instruction includes terminal ID info and command information.
Above-mentioned total Entitlement Control Message frame sequence and total Entitlement Management Message frame sequence usually pass through multiplexer and by adding
Disturb encrypted video flowing, audio stream is sent to customers' place together, decoding decryption is completed by the reception of client and deciphering module
Work.To,
Further, further include following steps:
Total Entitlement Control Message frame sequence is isolated according to the control frame identification；That is, user is according to the control
Frame identification processed separates total Entitlement Control Message frame sequence from code stream；Further according to the CAS version or kind of user terminal
Class finds the authorization control generated according to corresponding Entitlement Control Message create-rule from total Entitlement Control Message frame sequence
Information.Specifically, because the control segment identification can uniquely correspond to a kind of CAS version or type, in the application,
The Entitlement Control Message generated according to corresponding control create-rule is isolated according to the control segment identification.Work as authorization control
After information is isolated, user terminal further can be parsed and be handled to Entitlement Control Message according to routine techniques.
Further, further include following steps:
The step of total Entitlement Management Message frame sequence is isolated according to the management frame identification；That is, user according to
The management frame identification separates total Entitlement Management Message frame sequence from code stream；Further according to the CAS of user terminal version
This or type are found from total Entitlement Management Message frame sequence and are awarded according to what corresponding Entitlement Management Message create-rule generated
Weigh management information.Specifically, because the management segment identification can uniquely correspond to a kind of CAS version or type, this Shen
Please in, according to the management segment identification may be implemented that the Entitlement Management Message that management create-rule generates will be corresponded to and isolate
Purpose.
Further, the Entitlement Control Message create-rule and/or Entitlement Management Message create-rule are based on any
The rule of condition receiving system.A variety of Entitlement Control Message create-rules are different, various Entitlement Management Message create-rules
It is different；Meanwhile for same middle CAS version or type for, correspond to a kind of Entitlement Control Message create-rule and one
Kind Entitlement Management Message create-rule.
Further, the described at least two Entitlement Control Message create-rules and/or Entitlement Management Message generate rule
Then completed by a condition receiving system server.
Compared with prior art, beneficial effects of the present invention: the present invention needs to send more for operator in the prior art
It when kind cas system, needs individually to generate specific CAS code stream using different cas system servers, and leads to operator in turn
The problem of O&M cost increases provides a kind of difference that different CAS suppliers can be integrated in the same CAS Server
Parallel method inside " inside is with close " CAS of CAS function or version.
We generate the ECM data of different CAS functions or version using same CAS Server simultaneously, by using difference
ECM segmentation ID(control segment identification) different ECM data are distinguish after be combined together as the CAS of uniform packing
Data (total Entitlement Control Message frame sequence), by sharing the unified interface of PID realization with digital television devices (scrambling machine), from
And realize the program encryption function of different editions；
Meanwhile a variety of EMM data generated using same CAS Server based on a variety of CAS versions or function, equally pass through
Use different EMM segmentation ID((to manage segment identification) be distinguish after form EMM data (total empowerment management of uniform packing
Information frame sequence) after, by sharing the unified interface of PID realization and digital television devices (multiplexer), by using different
EMM is segmented ID, realizes the terminal management function of different editions.
Detailed description of the invention:
Fig. 1 is to invent total Entitlement Control Message frame sequence in the parallel method embodiment provided to generate schematic diagram.
Fig. 2 is to invent total Entitlement Management Message frame sequence in the parallel method embodiment provided to generate schematic diagram.
Specific embodiment
With reference to the accompanying drawing and specific embodiment the present invention is described in further detail.But this should not be interpreted as to this
The range for inventing above-mentioned theme is only limitted to embodiment below, all to belong to the present invention based on the technology that the content of present invention is realized
Range.
Embodiment 1: as shown in Figure 1 and Figure 2, the present embodiment provides sides parallel inside a kind of digital television conditional access system
Method comprises the following steps:
Receive scrambled control word；The scrambled control word is usually generated by scrambling machine；
In conjunction with the scrambled control word, authorization control letter is generated respectively according at least two Entitlement Control Message create-rules
It ceases (ECM)；Condition receiving system (CAS) type that the quantity of Entitlement Control Message create-rule and server need to complete or
Version quantity is related, such as can be a kind, 2 kinds or a variety of；Itself either identical conditions receive system different editions, can also
To be the condition receiving system of entirely different type.
Corresponding control segment identification is respectively set for every kind of Entitlement Control Message；The control segment identification is generally preferable
Be arranged in the initial position of each Entitlement Control Message control segment identification usually with a kind of Entitlement Control Message create-rule
It corresponds；That is, can uniquely determine the Entitlement Control Message by the control segment identification is believed by any authorization control
Create-rule is ceased to generate.
Various Entitlement Control Message groups are become into total Entitlement Control Message frame sequence, and control frame identification is set.It will be various
Entitlement Control Message forms total Entitlement Control Message frame sequence usually can be by TS(Transport Stream, transport stream) encapsulation when
It completes, can also be completed in other ad hoc steps；In a preferred approach, control segmentation mark can be equipped with using by each
The sequentially connected mode of the Entitlement Control Message of knowledge forms total Entitlement Control Message frame sequence.
Further include following steps: receiving terminal management instruction；The terminal management information usually can be by subscriber management system
(SMS) it generates, including terminal ID info and command information.
It is instructed in conjunction with the terminal management, generates empowerment management respectively according at least two Entitlement Management Message create-rules
Information (EMM)；Condition receiving system (CAS) type that the quantity of Entitlement Management Message create-rule and server need to complete or
Person's version quantity is related, such as can be a kind, 2 kinds or a variety of；Itself either identical conditions receive system different editions,
It can be the condition receiving system of entirely different type.
Management segment identification is respectively set for every kind of Entitlement Management Message；The generally preferable setting of the management segment identification exists
The initial position of each Entitlement Management Message；The management segment identification is usually a pair of with a kind of Entitlement Management Message create-rule one
It answers；That is, can uniquely determine the Entitlement Management Message by the management segment identification is generated by any Entitlement Management Message
Rule generates.
Various Entitlement Management Message groups are become into total Entitlement Management Message frame sequence, and unified management frame identification is set；
Various Entitlement Management Messages are formed total Entitlement Management Message frame sequence usually can be by TS(Transport Stream, transport stream)
It completes, can also be completed in other ad hoc steps when encapsulation；In a preferred approach, management can be equipped with using by each
The sequentially connected mode of the Entitlement Management Message of segment identification forms total Entitlement Management Message frame sequence.
Above-mentioned total Entitlement Control Message frame sequence and total Entitlement Management Message frame sequence usually pass through multiplexer and by adding
Disturb encrypted video flowing, audio stream is sent to customers' place together, completed to receive reconciliation by the reception of client and deciphering module
Close work.To,
And at the client at user, total Entitlement Management Message frame sequence and total authorization control are believed using following steps
Breath frame sequence is parsed:
The step of total Entitlement Management Message frame sequence is isolated according to the management frame identification；That is, user according to
The management frame identification separates total Entitlement Management Message frame sequence from code stream；Further according to the CAS of user terminal version
Sheet or type are found from total Entitlement Management Message frame sequence and being awarded according to what corresponding Entitlement Management Message create-rule generated
Weigh management information.Specifically, because the management segment identification can uniquely correspond to a kind of CAS version or type, it can be with
The Entitlement Management Message generated according to corresponding management create-rule is isolated according to management segment identification.
Meanwhile total Entitlement Control Message frame sequence being isolated according to the control frame identification；That is, user is according to institute
Control frame identification is stated to separate total Entitlement Control Message frame sequence from code stream；Further according to the CAS version of user terminal
Or type finds the authorization generated according to corresponding Entitlement Control Message create-rule from total Entitlement Control Message frame sequence
Control information.Specifically, because the control segment identification can uniquely correspond to a kind of CAS version or type, Ke Yigen
The Entitlement Control Message generated according to corresponding control creating info rules is isolated according to the control segment identification.When authorization is controlled
After information processed is isolated, user terminal can carry out subsequent processing to Entitlement Control Message according to routine techniques.
In the present embodiment, the Entitlement Control Message create-rule and/or Entitlement Management Message create-rule are based on appointing
The rule of meaning condition receiving system.A variety of Entitlement Control Message create-rules are different, and various Entitlement Management Messages generate rule
It is then different；Meanwhile for same middle CAS version or type for, correspond to a kind of Entitlement Control Message create-rule and
A kind of Entitlement Management Message create-rule.
In the present embodiment, at least two Entitlement Control Message create-rule and/or Entitlement Management Message are generated
Rule is completed by a condition receiving system server.
It simultaneously include the first cas system version in the same CAS Server in specific example as shown in Figure 1 and Figure 2
With two cas system versions of the second cas system version, that is, in same CAS Server, while including and the first cas system version
Corresponding first Entitlement Control Message create-rule and the second Entitlement Control Message corresponding with the second cas system version generate rule
Then, CW(scrambled control word is received from scrambling machine in CAS Server) after code stream, respectively simultaneously according to the first Entitlement Control Message
Create-rule generates the first Entitlement Control Message ECMG-A and generates the second authorization according to the second Entitlement Control Message create-rule
Information ECMG-B is controlled, in order to distinguish to two Entitlement Control Messages, respectively in the first Entitlement Control Message in the application
The head ECMG-A setting control segment identification, specifically, in the setting of the first packet header Entitlement Control Message ECMG-A and the first CAS system
The corresponding first control segment identification ECM_ of version of uniting is segmented ID_A；The setting and the in the second packet header Entitlement Control Message ECMG-B
The corresponding second control segment identification ECM_ of two cas system versions is segmented ID_B；And control segmentation mark will be included in TS encapsulation
The first Entitlement Control Message ECMG-A, the second Entitlement Control Message ECMG-B known is encapsulated as total Entitlement Control Message frame sequence,
And control frame identification ECM PID is set in total Entitlement Control Message frame sequence packet header, which is distinguished with identification
Cease frame sequence code stream；And by the code stream and video, audio code stream by being sent to user terminal together with multiplexer.
Meanwhile the CAS Server also receives terminal management instruction from subscriber management system (SMS)；The terminal management refers to
Enable includes terminal ID info and command information as shown in Figure 2；The CAS Server equally includes corresponding with the first cas system version
The first Entitlement Management Message create-rule and the second Entitlement Management Message create-rule corresponding with the second cas system version,
And it is instructed according to the first Entitlement Management Message create-rule combination terminal management generate the first Entitlement Management Message EMMG- respectively
A generates the second Entitlement Management Message EMMG-B according to the second Entitlement Management Message create-rule, likewise, in order to distinguish this
First Entitlement Management Message EMMG-A and second Entitlement Management Message EMMG-B, we are respectively in the first Entitlement Management Message
EMMG-A and the second Entitlement Management Message EMMG-B setting management segment identification, specifically, in the first Entitlement Management Message
The packet header EMMG-A is arranged ECM_ corresponding with the first Entitlement Management Message create-rule and is segmented ID_A, in the second Entitlement Management Message
The packet header EMMG-B is arranged ECM_ corresponding with the second Entitlement Management Message create-rule and is segmented ID_B, encapsulates further across TS,
It will be combined into and always award comprising the first Entitlement Management Message EMMG-A and the second Entitlement Management Message EMMG-B that manage segment identification
Management information frame sequence is weighed, and adds the management frame identification EMM for distinguishing total Entitlement Management Message frame sequence code stream for identification
PID, and by the code stream and video, audio code stream by being sent to user terminal together with multiplexer.
Claims (5)
1. parallel method inside a kind of digital television conditional access system, which is characterized in that comprise the following steps:
Receive scrambled control word；
In conjunction with the scrambled control word, Entitlement Control Message is generated respectively according at least two Entitlement Control Message create-rules；
Corresponding control segment identification is respectively set for every kind of Entitlement Control Message；
The sequentially connected mode of various Entitlement Control Messages is formed into total Entitlement Control Message frame sequence, and is controlled in total authorization
Information frame sequence processed packet header setting control frame identification；
And total Entitlement Control Message frame sequence of setting control frame identification is sent to user together with video, audio code stream
End；
Further include following steps:
Receive terminal management instruction；
It is instructed in conjunction with the terminal management, generates empowerment management letter respectively according at least two Entitlement Management Message create-rules
Breath；
Management segment identification is respectively set for every kind of Entitlement Management Message；
The sequentially connected mode of various Entitlement Management Messages is formed into total Entitlement Management Message frame sequence, and is managed in total authorization
Reason information frame sequence adds the management frame identification for distinguishing the various Entitlement Management Messages for identification；
And the total Entitlement Management Message frame sequence for adding management frame identification is sent to user together with video, audio code stream
End；
At least two Entitlement Control Message create-rule and/or Entitlement Management Message create-rule are by a condition
System server is received to complete.
2. the method as described in claim 1, which is characterized in that the terminal management instruction includes terminal ID info and instruction letter
Breath.
3. the method as described in claim 1, which is characterized in that further include following steps:
The step of total Entitlement Control Message frame sequence is isolated according to the control frame identification；
The Entitlement Control Message generated according to corresponding control creating info rules is isolated according to the control segment identification
Step.
4. the method as described in claim 1, which is characterized in that further include following steps:
The step of total Entitlement Management Message frame sequence is isolated according to the management frame identification；
The Entitlement Management Message generated according to corresponding management creating info rules is isolated according to the management segment identification
Step.
5. the method as described in claim 1, which is characterized in that the Entitlement Control Message create-rule and/or empowerment management
Creating info rules are the rule based on any condition receiving system.
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