CN102769776B - A kind of CAS of realization terminal obtains the system and method for mandate in time - Google Patents
A kind of CAS of realization terminal obtains the system and method for mandate in time Download PDFInfo
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- CN102769776B CN102769776B CN201210268106.0A CN201210268106A CN102769776B CN 102769776 B CN102769776 B CN 102769776B CN 201210268106 A CN201210268106 A CN 201210268106A CN 102769776 B CN102769776 B CN 102769776B
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Abstract
The invention discloses a kind of CAS of realization terminal and obtain the system of mandate in time, it includes: scrambling machine, and with CA server two-way communication, transmission control word, to CA server, receives Entitlement Control Message and Entitlement Management Message that CA server is sent；CA server, manages server two-way communication with EMM, sends Entitlement Management Message and manages server to EMM；EMM manages server, with CAS terminal two-way communication, receives CAS terminal request, sends Entitlement Management Message to CAS terminal；CAS terminal, with scrambling machine by radio network one-way communication, receives the Entitlement Control Message of scrambling machine transmission, Entitlement Management Message, scrambled data, descrambles and play program.The present invention makes CAS terminal start shooting at any time can obtain authorization message in time, it is ensured that user enjoys rights and interests and the good experience of digital television business, it is not necessary to manually authorize intervention, alleviates the workload of operator and user, easy to use.
Description
Technical field
The present invention relates to digital television techniques field, particularly relate to a kind of CAS of realization terminal and obtain the system and method for mandate in time.
Background technology
Condition receiving system (Conditional access system, CAS) is to ensure that the basic means of digital television business safety,
CAS has been responsible for the acquisition of user's authorization control and management information, has generated, encrypts, sends and the work such as program scheduling control, protects
The user that card has been authorized to the most just can watch program.Its general principle is: CAS front end system utilizes Control Word to number of programs
According to scrambling, and CW being encrypted generation Entitlement Control Message ECM, meanwhile, CAS front end system is for different users
Generate different Entitlement Management Message EMM；CAS terminal receive scrambled program data, ECM and EMM, decipher for oneself
The authorized information of EMM, utilizes authorization message deciphering ECM to obtain CW, and then descrambles scrambled program data with CW and play.
At present, CAS front end system mainly uses periodically transmission Entitlement Management Message EMM mode to authorize CAS terminal, every
A period of time, CAS front end system generates EMM data, is sent to CAS terminal, such as CAS front end within certain cycle
System generates EMM data in every 3 months, and continuously transmits in 10 days, and CAS terminal is deciphered authorized after receiving EMM
Information, and then scrambled program can be watched.But, there is certain problem in current this authorization, sends out at CAS front end system
In sending Entitlement Management Message EMM during this period of time, if CAS terminal is not powered on, then CAS terminal can not receive EMM, it is impossible to watches
Scrambled program.Unless user sends a telegraph operator, operator resends EMM data for this CAS terminal, otherwise in CAS front end
Before system sends Entitlement Management Message EMM next time, this CAS terminal will be unable to watch scrambled program.By sending a telegraph operator
Although retransmitting Entitlement Management Message EMM can obtain mandate, but the most cumbersome for user and operator, and in short-term
Interior meeting use digital television business to impact to user, also can have a certain impact the image of operator.Further, since
The EMM data of each user are different, and when user is more, EMM data can take substantial amounts of broadcast bandwidth, for a long time
Send substantial amounts of EMM data can program stream be affected.
Summary of the invention
The purpose of the present invention is contemplated to solve current CAS terminal and exists and cannot obtain mandate in time and affect user and use DTV
Business and operator carry out the problems such as independent Authorized operation trouble for user, it is proposed that one realizes CAS terminal and obtains in time
The system and method authorized so that CAS terminal is started shooting at any time and can be obtained authorization message in time, it is ensured that user enjoys
The rights and interests of digital television business and good experience, it is not necessary to manually authorize intervention, alleviate the workload of operator and user,
Easy to use.
To achieve these goals, the present invention adopts the following technical scheme that
A kind of CAS of realization terminal obtains the system of mandate in time, and it includes:
Scrambling machine, with CA server two-way communication, sends Control Word and sends to CA server, reception CA server
Entitlement Control Message ECM and Entitlement Management Message EMM；
CA server, manages server two-way communication with EMM, sends Entitlement Management Message EMM and manages server to EMM；
EMM manages server, with CAS terminal two-way communication, receives CAS terminal request, sends Entitlement Management Message EMM
To CAS terminal；
CAS terminal, with scrambling machine one-way communication, receives Entitlement Control Message ECM, Entitlement Management Message that scrambling machine sends
EMM, scrambled data, descramble and play program.
Realizing, based on said system, the method that CAS terminal obtains mandate in time, its step is:
S1:CA server generates Entitlement Management Message EMM, is sent to EMM management server and scrambling machine；
Program stream after Entitlement Management Message EMM and Entitlement Control Message ECM, scrambling is sent to extensively by S2: scrambling machine in the lump
Broadcast in net；
S3:CAS terminal starts, and downloads Entitlement Management Message EMM from EMM management server and resolves, it is thus achieved that CAS terminal
Authorization message；
S4:CAS terminal realizes the Conditional Access to program according to the authorization message obtained from EMM management server；
S5:CAS terminal receives Entitlement Management Message EMM from radio network and resolves, and updates the authorization message in CAS terminal,
And realize the Conditional Access to program according to the authorization message after updating.
In described step S3, the flow process downloading and resolving Entitlement Management Message EMM from EMM management server is:
S301: judge whether to exist in CAS terminal effective authorization message, if existing, exits flow process；If not existing, perform step
Rapid S302；
S302:CAS terminal sends EMM and downloads request to EMM management server；
S303:EMM management server judges that EMM download request is the most legal, if legal, performs step S304；If not conforming to
Method, exits flow process；
S304:EMM management server sends corresponding EMM data to CAS terminal；
S305:CAS terminal resolves EMM data, utilizes the authorization message in authorized information updating CAS terminal.
In described step S303, it is judged that EMM downloads the method for request legitimacy and is: described EMM downloads request to comprise less
CAS Termination ID identifier；If there are the EMM data corresponding with CAS Termination ID identifier, then in EMM management server
It is legal that EMM downloads request；Otherwise EMM download request is illegal.
Described authorization message is encryption storage in CAS terminal.
The invention has the beneficial effects as follows: while the present invention sends Entitlement Management Message EMM by scrambling machine, EMM is saved in
For CAS terminal downloads on EMM management server, solve CAS terminal and send the authorization message time because missing CAS front end system,
And causing the problem that CAS terminal temporarily cannot use digital television business, it is not necessary to manual intervention can realize CAS terminal and obtain in time
Authorization message, it is ensured that user enjoys rights and interests and the good experience of digital television business, alleviates the workload of operator and user,
Easy to use.It addition, the invention enables CAS front end system can reduce the time being sent EMM by radio network, it is to avoid a large amount of
EMM data take broadcast bandwidth for a long time, can reduce transmission the impact on program stream of the EMM data.
Accompanying drawing explanation
Fig. 1 is system architecture schematic diagram of the present invention；
Fig. 2 is the method for the invention flow chart；
Fig. 3 is that CAS terminal is downloaded from EMM management server, resolved EMM flow chart.
Detailed description of the invention
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the present invention, and the present invention shows
Meaning embodiment and explanation thereof are used for explaining the present invention, are not intended that inappropriate limitation of the present invention.
As shown in Figure 1, it is achieved CAS terminal obtains the system of mandate in time, it includes:
Scrambling machine, with CA server two-way communication, sends Control Word and sends to CA server, reception CA server
Entitlement Control Message ECM and Entitlement Management Message EMM；
CA server, manages server two-way communication with EMM, sends Entitlement Management Message EMM and manages server to EMM；
EMM manages server, with CAS terminal two-way communication, receives CAS terminal request, sends Entitlement Management Message EMM
To CAS terminal；
CAS terminal, with scrambling machine by radio network one-way communication, receives Entitlement Control Message ECM, mandate that scrambling machine sends
Management information EMM, scrambled data, descramble and play program.
As shown in Figure 2, it is achieved CAS terminal obtains the method for mandate in time, its step is:
S1:CA server generates Entitlement Management Message EMM, is sent to EMM management server and scrambling machine；
Entitlement Management Message EMM is sent in the lump in radio network by S2: scrambling machine with Entitlement Control Message ECM, program stream；
S3:CAS terminal starts, and downloads Entitlement Management Message EMM from EMM management server and resolves, it is thus achieved that CAS terminal
Authorization message；
S4:CAS terminal realizes the Conditional Access to program according to authorization message；
S5:CAS terminal receives Entitlement Management Message EMM from radio network and resolves, and updates the authorization message in CAS terminal.
Described authorization message is encryption storage in CAS terminal.
As it is shown on figure 3, the flow process that EMM was downloaded and resolved to CAS terminal from EMM management server is:
S301: judge whether to exist in CAS terminal effective authorization message, if existing, exits flow process；If not existing, perform step
Rapid S302；
S302:CAS terminal sends EMM download request and manages server to EMM, and described EMM downloads request to comprise less
The ID identifier of CAS terminal；
It is the most legal, if existing and EMM in EMM management server that S303:EMM management server judges that EMM downloads request
Download the EMM data that the CAS Termination ID identifier in request is corresponding, then EMM download request is legal, performs step S304；
Otherwise, it is illegal that EMM downloads request, exits flow process；
S304:EMM management server sends corresponding EMM data to CAS terminal；
S305:CAS terminal resolves EMM data, utilizes the authorization message in authorized information updating CAS terminal.
The above-mentioned preferred embodiment for the present invention, on the basis of technical scheme, the various amendments made or deformation are still
Belong to protection scope of the present invention.
Claims (3)
1. realize the method that CAS terminal obtains mandate in time,
The system that described method is applied includes:
Scrambling machine, with CA server two-way communication, transmission Control Word is to CA server, and receives CA
Entitlement Control Message ECM that server is sent and Entitlement Management Message EMM；
CA server, manages server two-way communication with EMM, sends Entitlement Management Message EMM to EMM
Management server；
EMM manages server, with CAS terminal two-way communication, receives CAS terminal request, sends and authorize pipe
Reason information EMM is to CAS terminal；
CAS terminal, with scrambling machine one-way communication, receives the Entitlement Control Message ECM of scrambling machine transmission, awards
Power management information EMM and scrambled data, play program after descrambling；
It is characterized in that, the step of described method is:
S1:CA server generates Entitlement Management Message EMM, is sent respectively to EMM management server and adds
Disturb machine；
S2: scrambling machine is by the program stream one after Entitlement Management Message EMM and Entitlement Control Message ECM, scrambling
And be sent in radio network；
S3:CAS terminal starts, and downloads Entitlement Management Message EMM from EMM management server and resolves,
Obtain CAS authorization terminal information；
S4:CAS terminal realizes having ready conditions program according to the authorization message obtained from EMM management server
Receive；
S5:CAS terminal receives Entitlement Management Message EMM from radio network and resolves, and updates in CAS terminal
Authorization message, and realize the Conditional Access to program according to the authorization message after updating；
In described step S3, download and resolve the flow process of Entitlement Management Message EMM from EMM management server
For:
S301: judge whether to exist in CAS terminal effective authorization message, if existing, exits flow process；Otherwise,
Perform step S302；
S302:CAS terminal sends EMM and downloads request to EMM management server；
S303:EMM management server judges that EMM download request is the most legal, if legal, performs step
S304；If illegal, exit flow process；
S304:EMM management server sends corresponding EMM data to CAS terminal；
S305:CAS terminal resolves EMM data, utilizes the mandate in authorized information updating CAS terminal
Information.
Realize the method that CAS terminal obtains mandate in time the most as claimed in claim 1, it is characterized in that, institute
State in step S303, it is judged that EMM downloads the method for request legitimacy and is: described EMM downloads request to few
Comprise CAS Termination ID identifier；If EMM management server existing corresponding with CAS Termination ID identifier
EMM data, then EMM download request legal；Otherwise EMM download request is illegal.
Realize the method that CAS terminal obtains mandate in time the most as claimed in claim 1, it is characterized in that, institute
Stating authorization message is encryption storage in CAS terminal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210268106.0A CN102769776B (en) | 2012-07-30 | 2012-07-30 | A kind of CAS of realization terminal obtains the system and method for mandate in time |
Applications Claiming Priority (1)
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| CN201210268106.0A CN102769776B (en) | 2012-07-30 | 2012-07-30 | A kind of CAS of realization terminal obtains the system and method for mandate in time |
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| CN102769776A CN102769776A (en) | 2012-11-07 |
| CN102769776B true CN102769776B (en) | 2016-09-07 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103841439A (en) * | 2014-02-26 | 2014-06-04 | 广西广播电视信息网络股份有限公司 | Method for achieving CA seamless reception of set top box through synchronous output of double scramblers |
| CN104202622B (en) * | 2014-09-23 | 2017-11-07 | 山东泰信电子股份有限公司 | A kind of advertisement safe broadcast method and system |
| KR102590165B1 (en) * | 2016-08-11 | 2023-10-17 | 삼성전자 주식회사 | Method and apparatus for installing cas information |
| CN113727196B (en) * | 2021-07-19 | 2023-09-15 | 深圳市华曦达科技股份有限公司 | Method, device and storage medium for realizing CAS terminal authorization on demand |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101227586A (en) * | 2007-01-15 | 2008-07-23 | 北京邦天科技有限公司 | Method and system for implementing broadcasting network condition receiving |
| CN101321261A (en) * | 2008-04-25 | 2008-12-10 | 北京创毅视讯科技有限公司 | Front-end system, user terminal and authorization management information distribution method |
| CN101924909A (en) * | 2010-07-20 | 2010-12-22 | 深圳市茁壮网络股份有限公司 | Middleware adaptation layer-based universal digital television conditional access system |
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2012
- 2012-07-30 CN CN201210268106.0A patent/CN102769776B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101227586A (en) * | 2007-01-15 | 2008-07-23 | 北京邦天科技有限公司 | Method and system for implementing broadcasting network condition receiving |
| CN101321261A (en) * | 2008-04-25 | 2008-12-10 | 北京创毅视讯科技有限公司 | Front-end system, user terminal and authorization management information distribution method |
| CN101924909A (en) * | 2010-07-20 | 2010-12-22 | 深圳市茁壮网络股份有限公司 | Middleware adaptation layer-based universal digital television conditional access system |
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