CN102523484B - System and method for scrambling digital television data - Google Patents
System and method for scrambling digital television data Download PDFInfo
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- CN102523484B CN102523484B CN 201110443202 CN201110443202A CN102523484B CN 102523484 B CN102523484 B CN 102523484B CN 201110443202 CN201110443202 CN 201110443202 CN 201110443202 A CN201110443202 A CN 201110443202A CN 102523484 B CN102523484 B CN 102523484B
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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 the process of transport stream (TS, Transport Stream) being carried out to the step-by-step encryption by control word (CW, Control Word), by scrambler, realizes.Scrambler is at condition receiving system (CAS, Conditional Access System) under control, the appointed program in transport stream is carried out to scrambling, authorized user can normally be watched, and unauthorized user haves no right to watch, and then realize that system operator is to digital television program and the user toll administration of being had ready conditions.
Fig. 1 has provided the scrambling system used in current digital television system, and it comprises scrambler, at least one condition reception (CA) server and NM server, scrambler respectively with condition reception (CA) server, NM server two-way communication.The operation principle of scrambling system shown in Fig. 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 scrambler, same close synchronization control module in scrambler produces Control Word and CW is issued to scrambling module data stream is carried out to scrambling, CW is sent to the condition reception server simultaneously; 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 and Subscriber Management System; Scrambler carries out scrambling with the Control Word generated to data stream, revises corresponding PSI/SI table information according to the control information of NM server simultaneously; Finally, scrambler by amended PSI/SI show, data flow, ECM and EMM data after scrambling carry out system multiplexing output.
With regard to current scrambling system, scrambler need to complete Control Word 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 large.Due to 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 several functions of scrambler, when any one Functional change, all needs scrambler is modified or upgraded, compatible poor; Between scrambler and NM server, by network, communicate, when the network data amount is large or network in invalid network packet when more, can produce certain impact to scrambler, the scrambler antijamming capability a little less than.
Summary of the invention
Purpose of the present invention is exactly that the disposal ability that current scrambler exists is limited in order to solve, the problem such as a little less than poor compatibility and anti-data interference performance, a kind of digital TV data scrambling system and method have been proposed, this system turns the data management of scrambler control function by the scrambling Control Server and completes, scrambling equipment only is responsible for data scrambling and is processed, and has the 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, described scrambling Control Server is responsible for that Control Word generates, many condition receptions with close Synchronization Control, Entitlement Control Message ECM and Entitlement Management Message EMM are managed, control scrambling equipment program stream is carried out to the scrambling processing;
At least one condition reception server, be responsible for receiving the Control Word that the scrambling Control Server is sent, generate Entitlement Control Message ECM and Entitlement Management Message EMM according to Control Word 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 and the scrambling control information being responsible for sending according to the scrambling Control Server are carried out the scrambling processing to the program stream received, and the program stream after scrambling and Entitlement Control Message ECM, Entitlement Management Message EMM, PSI/SI are shown to multiplexing rear output; With
NM server, with the two-way communication of scrambling Control Server, resolve the input transport stream, revise PSI/SI information and configuration CA information and scramble information, and configuration information is sent to the scrambling Control Server.
Described scrambling Control Server and described NM server are the servers of two platform independent, are separately installed with scrambling and control software and webmastering software.
Described scrambling Control Server and described NM server are same station servers, scrambling is installed simultaneously and controls software and webmastering software.
Described scrambling Control Server and described NM server are PCs.
A kind of digital TV data method for scrambling, the method comprises:
NM server sends configuration CA information and configures the scramble information instruction to the scrambling Control Server;
The scrambling Control Server is connected with the condition reception server, generates Control Word, and Control Word 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 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 and Entitlement Control Message ECM;
The scrambling Control Server sends the scrambling control information to scrambling equipment, and the Control Server of scrambling simultaneously transmission Control Word and Entitlement Control Message ECM, Entitlement Management Message EMM are to scrambling equipment;
NM server sends and obtains the PSI/SI information command, by the scrambling Control Server, sends to scrambling equipment;
Scrambling equipment filters out PSI/SI information from input TS stream, by the scrambling Control Server, sends to NM server;
NM server is modified to the PSI/SI table, and amended PSI/SI table is issued to scrambling equipment by the scrambling Control Server;
Scrambling equipment carries out the scrambling processing according to scrambling control information, Control Word to input TS stream, and the stream of the TS after scrambling and Entitlement Control Message ECM, Entitlement Management Message EMM, PSI/SI table are carried out exporting after system multiplexing.
Described scrambling control information at least comprises the scrambling algorithm of the programme information that need to carry out scrambling, scrambling mode, use.
The invention has the beneficial effects as follows: the present invention utilizes the scrambling Control Server to generate Control Word, carries out many condition receiving systems with close Synchronization Control, Entitlement Control Message ECM and Entitlement Management Message EMM are processed, send the scrambling control information to scrambling equipment, make scrambling equipment without carrying out Control Word generation, many condition receiving systems with information processing control work such as close Synchronization Control, TS flow analysis, the scrambling control information that the scrambling device just will be sent according to the scrambling Control Server is carried out the scrambling processing to TS stream and is got final product.The present invention is by the management control work of independent scrambler and the scrambling Control Server is transferred to respectively in the scrambling work for the treatment of and scrambling equipment completes, the 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 the advantages such as the data scrambling disposal ability is strong, the software compatibility good, antijamming capability is strong.
The accompanying drawing explanation
Fig. 1 is prior art Digital Television scrambling system structural representation;
Fig. 2 is the structural representation of system of the present 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 invention will be further described.
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms a part of the present invention, and illustrated embodiment of the present invention and explanation thereof the present invention do not form inappropriate limitation of the present invention for explaining.
As shown in Figure 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, described scrambling Control Server is responsible for that Control Word generates, many condition receptions with close Synchronization Control, Entitlement Control Message ECM and Entitlement Management Message EMM are managed, control scrambling equipment program stream is carried out to the scrambling processing;
At least one condition reception server, be responsible for receiving the Control Word that the scrambling Control Server is sent, generate Entitlement Control Message ECM and Entitlement Management Message EMM according to Control Word 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 and the scrambling control information being responsible for sending according to the scrambling Control Server are carried out the scrambling processing to the program stream received, and the program stream after scrambling and Entitlement Control Message ECM, Entitlement Management Message EMM, PSI/SI are shown to multiplexing rear output; With
NM server, with the two-way communication of scrambling Control Server, resolve the input transport stream, revise PSI/SI information and configuration CA information and scramble information, and configuration information is sent to the scrambling Control Server.
Described NM server and scrambling Control Server can be two servers that are separately installed with webmastering software and scrambling control software, can be also a server that webmastering software and scrambling control software are installed simultaneously.
Described NM server and scrambling Control Server can also be PCs.
System based on shown in Fig. 2, realize that the method for digital TV data scrambling is:
NM server sends configuration CA information and configures the scramble information instruction to the scrambling Control Server;
The scrambling Control Server is connected with the condition reception server, generates Control Word, and Control Word 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 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 and Entitlement Control Message ECM;
The scrambling Control Server sends the scrambling control information to scrambling equipment, and the Control Server of scrambling simultaneously transmission Control Word and Entitlement Control Message ECM, Entitlement Management Message EMM are to scrambling equipment;
NM server sends and obtains the PSI/SI information command, by the scrambling Control Server, sends to scrambling equipment;
Scrambling equipment filters out PSI/SI information from input TS stream, by the scrambling Control Server, sends to NM server;
NM server is modified to the PSI/SI table, and amended PSI/SI table is issued to scrambling equipment by the scrambling Control Server;
Scrambling equipment carries out the scrambling processing according to scrambling control information, Control Word to input TS stream, and the stream of the TS after scrambling and Entitlement Control Message ECM, Entitlement Management Message EMM, PSI/SI table are carried out exporting after system multiplexing.
Described scrambling control information at least comprises the scrambling algorithm of the programme information that need to carry out scrambling, scrambling mode, use.
Above-mentioned is preferred embodiment of the present invention, and on the basis of technical scheme of the present invention, the 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, respectively with at least one condition reception server, at least one scrambling equipment and NM server two-way communication; Wherein,
Described scrambling Control Server is responsible for that Control Word generates, many condition receptions with close Synchronization Control, Entitlement Control Message ECM and Entitlement Management Message EMM are managed, control described scrambling equipment program stream is carried out to the scrambling processing;
Described condition reception server, be responsible for receiving the Control Word that the scrambling Control Server is sent, generate Entitlement Control Message ECM and Entitlement Management Message EMM according to Control Word and authorization message, and Entitlement Control Message ECM and Entitlement Management Message EMM are sent to the scrambling Control Server;
Described scrambling equipment, Control Word and the scrambling control information being responsible for sending according to the scrambling Control Server are carried out the scrambling processing to the program stream received, and the program stream after scrambling and Entitlement Control Message ECM, Entitlement Management Message EMM, PSI/SI are shown to multiplexing rear output;
Described NM server, with the two-way communication of scrambling Control Server, resolve and input transport stream, revise PSI/SI information and send configuration CA information and configure the scramble information instruction to the scrambling Control Server.
2. digital TV data scrambling system as claimed in claim 1, is characterized in that, described scrambling Control Server and described NM server are the servers of two platform independent, is separately installed with scrambling and controls software and webmastering software.
3. digital TV data scrambling system as claimed in claim 1, is characterized in that, described scrambling Control Server and described NM server are same station servers, scrambling is installed simultaneously and controls software and webmastering software.
4. digital TV data scrambling system as claimed in claim 1, is characterized in that, described scrambling Control Server and described NM server are PCs.
5. a method for scrambling that adopts the described digital TV data scrambling system of claim 1, is characterized in that, the method step comprises:
NM server sends configuration CA information and configures the scramble information instruction to the scrambling Control Server;
The scrambling Control Server is connected with some condition reception servers, generates Control Word, and Control Word 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 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 and Entitlement Control Message ECM;
The scrambling Control Server sends the scrambling control information to scrambling equipment, and the Control Server of scrambling simultaneously transmission Control Word and Entitlement Control Message ECM, Entitlement Management Message EMM are to scrambling equipment;
NM server sends and obtains the PSI/SI information command, by the scrambling Control Server, sends to scrambling equipment;
Scrambling equipment filters out PSI/SI information from input TS stream, by the scrambling Control Server, sends to NM server;
NM server is modified to the PSI/SI table, and amended PSI/SI table is issued to scrambling equipment by the scrambling Control Server;
Scrambling equipment carries out the scrambling processing according to scrambling control information, Control Word to input TS stream, and the stream of the TS after scrambling and Entitlement Control Message ECM, Entitlement Management Message EMM, PSI/SI table are carried out exporting after system multiplexing.
6. method for scrambling as claimed in claim 5, is characterized in that, described scrambling control information at least comprises the scrambling algorithm of the programme information that need to carry out scrambling, scrambling mode, use.
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| 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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| CN102523484A CN102523484A (en) | 2012-06-27 |
| CN102523484B true CN102523484B (en) | 2013-12-25 |
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| CN102761778B (en) * | 2012-07-30 | 2016-05-04 | 山东泰信电子股份有限公司 | A kind of data encrypting and deciphering system and method based on bidirectional terminal |
| CN102761777B (en) * | 2012-07-30 | 2015-07-15 | 山东泰信电子股份有限公司 | Multiple-CA (conditional access) simulcrypt system and method |
| 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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| CN1764268A (en) * | 2004-10-22 | 2006-04-26 | 北京握奇数据系统有限公司 | CATV signal receiving and processing method |
| CN101087402A (en) * | 2007-03-12 | 2007-12-12 | 深圳清华大学研究院 | Digital TV encryption and authorization system and method based on IP stream |
| CN102143392A (en) * | 2011-05-10 | 2011-08-03 | 北京广电天地信息咨询有限公司 | Control word encryption and decryption methods and control word encryption and decryption systems |
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| US8819843B2 (en) * | 2008-02-15 | 2014-08-26 | Qualcomm Incorporated | Methods and apparatus for conditional access of non real-time content in a distribution system |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1764268A (en) * | 2004-10-22 | 2006-04-26 | 北京握奇数据系统有限公司 | CATV signal receiving and processing method |
| CN101087402A (en) * | 2007-03-12 | 2007-12-12 | 深圳清华大学研究院 | Digital TV encryption and authorization system and method based on IP stream |
| CN102143392A (en) * | 2011-05-10 | 2011-08-03 | 北京广电天地信息咨询有限公司 | Control word encryption and decryption methods and control word encryption and decryption systems |
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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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