CN102523484A - System and method for scrambling digital television data - Google Patents
System and method for scrambling digital television data Download PDFInfo
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- CN102523484A CN102523484A CN201110443202XA CN201110443202A CN102523484A CN 102523484 A CN102523484 A CN 102523484A CN 201110443202X A CN201110443202X A CN 201110443202XA CN 201110443202 A CN201110443202 A CN 201110443202A CN 102523484 A CN102523484 A CN 102523484A
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Abstract
The invention discloses a system and a method for scrambling digital television data. The system comprises a scrambling control server, at least one conditional receiving server, at least one set of scrambling equipment and a network management server, wherein the scrambling control server bidireticonally communicates with the conditional receiving server, the at least one set of scrambling equipment and the network management server respectively. The system generates a control word (CW) and synchronously controls the plurality of conditional receiving servers through the scrambling control server, and sends scrambling control information to the scrambling equipment through the scrambling control server to control the scrambling equipment to scramble a program stream according to a specific mode, so that the digital television data is scrambled. The system and the method have the advantages of high scrambling processing capacity, high compatibility, high anti-interference capacity and the like.
Description
Technical field
The present invention relates to the digital television techniques field, relate in particular to a kind of digital TV data scrambling system and method.
Background technology
Scrambling is through control word (CW, Control Word) MPTS (TS, Transport Stream) to be carried out the step-by-step encrypted process, realizes through scrambler.Scrambler is at condition receiving system (CAS; Conditional Access System) control is carried out scrambling to the appointed program in the MPTS down; Authorized user can normally be watched; And unauthorized user haves no right to watch, and then realizes that system operator is to digital television program and the user toll administration of having ready conditions.
Fig. 1 has provided the scrambling system that uses in the present digital television system, and it comprises that scrambler, at least one condition receive (CA) server and NM server, and scrambler receives (CA) server, NM server two-way communication with condition respectively.Scrambling system operation principle shown in Figure 1 is: scrambler carries out real-time analysis to the TS stream of input; Find out the data flow that needs scrambling and give the scrambling module in the scrambler; Same close synchronization control module in the scrambler produces control word CW and CW is issued scrambling module data stream is carried out scrambling, simultaneously CW is sent to the condition reception server; The condition reception server generates Entitlement Control Message ECM and Entitlement Management Message EMM and ECM and EMM is sent to scrambler according to the subscriber information in control word CW and the Subscriber Management System; Scrambler carries out scrambling with the control word CW that generates to data stream, revises corresponding PSI/SI table information according to the control information of NM server simultaneously; At last, scrambler with amended PSI/SI show, data flow, ECM and EMM data after the scrambling carry out system multiplexing output.
With regard to present scrambling system, scrambler need be accomplished control word CW generation, the real-time analysis of TS stream, many CAS with close Synchronization Control, the modification of PSI/SI table and data flow scrambling work, and workload is big.Because the scrambler performance limitations, scrambler generates in control word, many CAS are limited with aspect disposal abilities such as close Synchronization Control, the modifications of PSI/SI table; In addition, the integrated multiple function of scrambler when any one changing function, all need be made amendment or upgrades scrambler, and is compatible relatively poor; Communicate through network between scrambler and the NM server, invalid network packet can produce certain influence to scrambler more for a long time in the big or network when the network data amount, the scrambler antijamming capability a little less than.
Summary of the invention
The object of the invention is exactly that the disposal ability that present scrambler exists is limited in order to solve, problem such as a little less than poor compatibility and the anti-data interference performance; A kind of digital TV data scrambling system and method have been proposed; This system is accomplished the data management controlled function commentaries on classics of scrambler by the scrambling Control Server; Scrambling equipment only is responsible for data scrambling and is handled, and has advantages such as strong, compatible good, the anti-network interferences ability of data-handling capacity is strong.
To achieve these goals, the present invention adopts following technical scheme:
A kind of digital TV data scrambling system, it comprises
The scrambling Control Server; Respectively with at least one condition reception server, at least one scrambling equipment and NM server two-way communication, said scrambling Control Server is responsible for that control word CW generates, many conditions receive with close Synchronization Control, Entitlement Control Message ECM and Entitlement Management Message EMM are managed, control scrambling equipment carries out scrambling process to program stream;
At least one condition reception server; Be responsible for receiving the control word CW that the scrambling Control Server is sent; Generate Entitlement Control Message ECM and Entitlement Management Message EMM according to control word CW and authorization message, and Entitlement Control Message ECM and Entitlement Management Message EMM are sent to the scrambling Control Server;
At least one scrambling equipment; Control word CW and the scrambling control information being responsible for sending according to the scrambling Control Server are carried out scrambling process to the program stream that receives, and the program stream after the scrambling and Entitlement Control Message ECM, Entitlement Management Message EMM, the multiplexing back of PSI/SI table are exported; With
NM server with the two-way communication of scrambling Control Server, is resolved the input MPTS, is revised PSI/SI information and configuration CA information and scramble information, and configuration information is sent to the scrambling Control Server.
Said scrambling Control Server and said NM server are the servers of two platform independent, are separately installed with scrambling Control Software and webmastering software.
Said scrambling Control Server and said NM server are same station servers, and scrambling Control Software and webmastering software are installed simultaneously.
Said scrambling Control Server and said NM server are PCs.
A kind of digital TV data method for scrambling, this method comprises:
NM server sends configuration CA information and instructs to the scrambling Control Server with the configuration scramble information;
The scrambling Control Server is connected with the condition reception server, generates control word CW, and control word CW is sent to the condition reception server;
The condition reception server generates Entitlement Control Message ECM and Entitlement Management Message EMM according to control word CW and authorized user message, and Entitlement Control Message ECM and Entitlement Management Message EMM are sent to the scrambling Control Server;
The scrambling Control Server is done with close Synchronous Processing control word CW and Entitlement Control Message ECM;
The scrambling Control Server sends the scrambling control information and gives scrambling equipment, and the Control Server of scrambling simultaneously sends control word CW and Entitlement Control Message ECM, Entitlement Management Message EMM give scrambling equipment;
NM server sends and obtains the PSI/SI information command, sends to scrambling equipment through the scrambling Control Server;
Scrambling equipment filters out PSI/SI information from input TS stream, send to NM server through the scrambling Control Server;
NM server is made amendment to the PSI/SI table, and amended PSI/SI table is issued scrambling equipment through the scrambling Control Server;
Scrambling equipment carries out scrambling process according to scrambling control information, control word CW to input TS stream, and the stream of the TS after the scrambling and Entitlement Control Message ECM, Entitlement Management Message EMM, PSI/SI table are carried out exporting behind the system multiplexing.
Said scrambling control information comprises the scrambling algorithm of the programme information that need carry out scrambling, scrambling mode, use at least.
The invention has the beneficial effects as follows: the present invention utilize the scrambling Control Server generate control word CW, carry out many condition receiving systems with close Synchronization Control, Entitlement Control Message ECM and Entitlement Management Message EMM handled, send the scrambling control information give scrambling equipment; Make scrambling equipment need not to carry out control word CW generation, many condition receiving systems with information processing Control work such as close Synchronization Control, TS flow analysis, the scrambling device just will be carried out scrambling process to TS stream according to the scrambling control information that the scrambling Control Server is sent and got final product.The present invention transfers to scrambling Control Server and the completion of scrambling equipment respectively with the management Control work and the scrambling process work of independent scrambler; Advantages such as scrambling Control Server data-handling capacity is strong, software upgrading convenient, anti-network interferences ability is strong have been given full play to; And the superior data scrambling disposal ability of scrambling equipment, the present invention has advantages such as the data scrambling disposal ability is strong, the software compatibility good, antijamming capability is strong.
Description of drawings
Fig. 1 is a prior art DTV scrambling system structural representation;
Fig. 2 is the structural representation of system according to the invention;
Wherein, 1, the scrambling Control Server, 2, scrambling equipment, 3, the condition reception server, 4, NM server.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described further.
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes a part of the present invention, and illustrated embodiment of the present invention and explanation thereof are used to explain the present invention, does not constitute improper qualification of the present invention.
Shown in accompanying drawing 2, the digital TV data scrambling system, it comprises:
The scrambling Control Server; Respectively with at least one condition reception server, at least one scrambling equipment and NM server two-way communication, said scrambling Control Server is responsible for that control word CW generates, many conditions receive with close Synchronization Control, Entitlement Control Message ECM and Entitlement Management Message EMM are managed, control scrambling equipment carries out scrambling process to program stream;
At least one condition reception server; Be responsible for receiving the control word CW that the scrambling Control Server is sent; Generate Entitlement Control Message ECM and Entitlement Management Message EMM according to control word CW and authorization message, and Entitlement Control Message ECM and Entitlement Management Message EMM are sent to the scrambling Control Server;
At least one scrambling equipment; Control word CW and the scrambling control information being responsible for sending according to the scrambling Control Server are carried out scrambling process to the program stream that receives, and the program stream after the scrambling and Entitlement Control Message ECM, Entitlement Management Message EMM, the multiplexing back of PSI/SI table are exported; With
NM server with the two-way communication of scrambling Control Server, is resolved the input MPTS, is revised PSI/SI information and configuration CA information and scramble information, and configuration information is sent to the scrambling Control Server.
Said NM server and scrambling Control Server can be two servers that are separately installed with webmastering software and scrambling Control Software, also can be a server that webmastering software and scrambling Control Software are installed simultaneously.
Said NM server and scrambling Control Server can also be PCs.
Based on system shown in Figure 2, realize that the method for digital TV data scrambling is:
NM server sends configuration CA information and instructs to the scrambling Control Server with the configuration scramble information;
The scrambling Control Server is connected with the condition reception server, generates control word CW, and control word CW is sent to the condition reception server;
The condition reception server generates Entitlement Control Message ECM and Entitlement Management Message EMM according to control word CW and authorized user message, and Entitlement Control Message ECM and Entitlement Management Message EMM are sent to the scrambling Control Server;
The scrambling Control Server is done with close Synchronous Processing control word CW and Entitlement Control Message ECM;
The scrambling Control Server sends the scrambling control information and gives scrambling equipment, and the Control Server of scrambling simultaneously sends control word CW and Entitlement Control Message ECM, Entitlement Management Message EMM give scrambling equipment;
NM server sends and obtains the PSI/SI information command, sends to scrambling equipment through the scrambling Control Server;
Scrambling equipment filters out PSI/SI information from input TS stream, send to NM server through the scrambling Control Server;
NM server is made amendment to the PSI/SI table, and amended PSI/SI table is issued scrambling equipment through the scrambling Control Server;
Scrambling equipment carries out scrambling process according to scrambling control information, control word CW to input TS stream, and the stream of the TS after the scrambling and Entitlement Control Message ECM, Entitlement Management Message EMM, PSI/SI table are carried out exporting behind the system multiplexing.
Said scrambling control information comprises the scrambling algorithm of the programme information that need carry out scrambling, scrambling mode, use at least.
Above-mentioned is preferred embodiment of the present invention, and on the basis of technical scheme of the present invention, various modifications of making or distortion still belong to protection scope of the present invention.
Claims (6)
1. a digital TV data scrambling system is characterized in that, comprising:
The scrambling Control Server is respectively with at least one condition reception server, at least one scrambling equipment and NM server two-way communication; Wherein,
Said scrambling Control Server is responsible for control word CW and is generated, many conditions receive with close Synchronization Control, Entitlement Control Message ECM and Entitlement Management Message EMM are managed, control said scrambling equipment carries out scrambling process to program stream;
Said condition reception server; Be responsible for receiving the control word CW that the scrambling Control Server is sent; Generate Entitlement Control Message ECM and Entitlement Management Message EMM according to control word CW and authorization message, and Entitlement Control Message ECM and Entitlement Management Message EMM are sent to the scrambling Control Server;
Said scrambling equipment; Control word CW and the scrambling control information being responsible for sending according to the scrambling Control Server are carried out scrambling process to the program stream that receives, and the program stream after the scrambling and Entitlement Control Message ECM, Entitlement Management Message EMM, the multiplexing back of PSI/SI table are exported;
Said NM server with the two-way communication of scrambling Control Server, is resolved the input MPTS, is revised PSI/SI information and configuration CA information and scramble information, and configuration information is sent to the scrambling Control Server.
2. digital TV data scrambling system as claimed in claim 1 is characterized in that, said scrambling Control Server and said NM server are the servers of two platform independent, are separately installed with scrambling Control Software and webmastering software.
3. digital TV data scrambling system as claimed in claim 1 is characterized in that, said scrambling Control Server and said NM server are same station servers, and scrambling Control Software and webmastering software are installed simultaneously.
4. digital TV data scrambling system as claimed in claim 1 is characterized in that, said scrambling Control Server and said NM server are PCs.
5. a method for scrambling that adopts the said digital TV data scrambling system of claim 1 is characterized in that, this method step comprises:
NM server sends configuration CA information and instructs to the scrambling Control Server with the configuration scramble information;
The scrambling Control Server is connected with some condition reception servers, generates control word CW, and control word CW is sent to the condition reception server;
The condition reception server generates Entitlement Control Message ECM and Entitlement Management Message EMM according to control word CW and authorized user message, and Entitlement Control Message ECM and Entitlement Management Message EMM are sent to the scrambling Control Server;
The scrambling Control Server is done with close Synchronous Processing control word CW and Entitlement Control Message ECM;
The scrambling Control Server sends the scrambling control information and gives scrambling equipment, and the Control Server of scrambling simultaneously sends control word CW and Entitlement Control Message ECM, Entitlement Management Message EMM give scrambling equipment;
NM server sends and obtains the PSI/SI information command, sends to scrambling equipment through the scrambling Control Server;
Scrambling equipment filters out PSI/SI information from input TS stream, send to NM server through the scrambling Control Server;
NM server is made amendment to the PSI/SI table, and amended PSI/SI table is issued scrambling equipment through the scrambling Control Server;
Scrambling equipment carries out scrambling process according to scrambling control information, control word CW to input TS stream, and the stream of the TS after the scrambling and Entitlement Control Message ECM, Entitlement Management Message EMM, PSI/SI table are carried out exporting behind the system multiplexing.
6. method for scrambling as claimed in claim 5 is characterized in that, said scrambling control information comprises the scrambling algorithm of the programme information that need carry out scrambling, scrambling mode, use at least.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201110443202 CN102523484B (en) | 2011-12-27 | 2011-12-27 | System and method for scrambling digital television data |
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| CN 201110443202 CN102523484B (en) | 2011-12-27 | 2011-12-27 | System and method for scrambling digital television data |
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| CN102523484B CN102523484B (en) | 2013-12-25 |
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| CN102761778A (en) * | 2012-07-30 | 2012-10-31 | 山东泰信电子股份有限公司 | Data encrypting and decrypting system and method based on bidirectional terminal |
| CN102761777A (en) * | 2012-07-30 | 2012-10-31 | 山东泰信电子股份有限公司 | Multiple-CA (conditional access) simulcrypt system and method |
| CN107749999A (en) * | 2017-09-28 | 2018-03-02 | 高斯贝尔数码科技股份有限公司 | Parallel method inside a kind of digital television conditional access system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102761778A (en) * | 2012-07-30 | 2012-10-31 | 山东泰信电子股份有限公司 | Data encrypting and decrypting system and method based on bidirectional terminal |
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| CN107749999A (en) * | 2017-09-28 | 2018-03-02 | 高斯贝尔数码科技股份有限公司 | Parallel method inside a kind of digital television conditional access system |
| CN107749999B (en) * | 2017-09-28 | 2019-10-22 | 高斯贝尔数码科技股份有限公司 | A kind of digital television conditional access system inside parallel method |
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Address after: Xinluo Avenue high tech Zone of Ji'nan City, Shandong province 250101 silver bearing No. 2008 building 1-501-1 Applicant after: Shandong Taixin Electronics Co., Ltd. Address before: Xinluo Avenue high tech Zone of Ji'nan City, Shandong province 250101 silver bearing No. 2008 building 1-501-1 Applicant before: Shandong Taixin Electronics Co., Ltd. |
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