CN101247500A - General software descrambling method for different scrambling systems of digital television - Google Patents
General software descrambling method for different scrambling systems of digital television Download PDFInfo
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- CN101247500A CN101247500A CNA2007100052472A CN200710005247A CN101247500A CN 101247500 A CN101247500 A CN 101247500A CN A2007100052472 A CNA2007100052472 A CN A2007100052472A CN 200710005247 A CN200710005247 A CN 200710005247A CN 101247500 A CN101247500 A CN 101247500A
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Abstract
The present invention discloses a method for descrambling the common software which is applied on different scrambling system of the digital television. The method comprises the following procedures: (1) electrifying the system, and running the system actuating software module to complete the system initiation; (2) running the application software module by the system; (3) reading the CA information of the smart card for automatically recognizing the current scrambling system for judging where a matched descrambling software module exists in the descrambling software module base, if not executing the procedure (5); (4) if it is, automatic activating the matched descrambling software module by the application software module to complete the functions of descrambling, deciphering, decoding and program selecting to the received digital signal; (5) springing a human-computer dialogue window to remain the providing of the software upgrading of the manufacturer to the user; and (6) re-electrifying after the software upgrading to operate the system.
Description
Technical field
The present invention relates to a kind of general software descrambling method, relate in particular to a kind of general software descrambling method that is applied to different scrambling systems of digital television.
Background technology
The developing direction of radio and television in the world wide, Digital Television will replace simulated television, and following pay TV and other value-added service will become the main source of television industries income, therefore must the introducing condition receive (CA) function.As the receiving terminal for digital television product, not only to have the digital-to-analogue conversion function, also to have functions such as condition reception, value-added service and information interaction.These functions are in development period, because the continual renovation of uncertain, the technology content of standard and the otherness of key technology and invisible, make Design Mode instability, production localization and the variation of receiving terminal for digital television product, influenced the digital development of radio and television.
Access way between CA and the set-top box can have two kinds:
(1) separation between machine and card lesser calorie mode, just single CA pattern is with the private specific information of smart cards for storage CA manufacturer.Current most of CA system all adopts this mode, and this mode is convenient to change card upgrade and is regenerated, and can tackle the hacker more economically and steal secret information.
(2) CA separates the kilocalorie mode fully with set-top box, CI pattern just, and set-top box is transparent, can large-scale production, all CA information and function all shift and are integrated into one and can plug the condition receiving unit that separates, and promptly go in the CA module kilocalorie.
The characteristics in China Broadcast ﹠ Television market are the asset structure complexity, network is many, network is little.Asset structure is complicated to make that integration becomes very difficult on a large scale; Network is many, and the CA system that each family adopts has nothing in common with each other, and set-top box has only embedding could use with the CA receiving software module that concrete market conforms to, and makes the market of set-top box be cut into plurality of small blocks; Network is little, makes that the demand of set-top box in each concrete market is all little.
In this case, manufacturer can't effectively grasp the market demand, and then the plan of can't arranging production, more can't volume production, and Virtual network operator then becomes set-top box purchaser and retailer.But because marketing aspect is the weakness place of operators, add the tendentiousness of some human factors, operator, in fact shielded getting in touch between manufacturer and end user, cause the end user to have no right selector top box freely, hinder the sale of set-top box virtually, increased the uncertainty in market.
The production and sales of set-top box are slow, further restricted manufacturing development.Domestic traditional consumer electronics leading vendor, because specification can not be unified, industry size is big inadequately, is difficult to bring into play the production advantage of self, more can't make the integrated receiver that integrated digital television receives.Because end product can not reduce cost by large-scale production, the large tracts of land that has also influenced cable digital TV is conversely promoted, the sluggish industrialization process of Digital Television.
Consider from the large-scale production angle, wish that set-top box can become a kind of transparent open product that is not subjected to any other function limitation of the technology as television set.And,, also proposed to adopt the policy of the complete separation scheme of machine card from the current the most urgent CA restriction bottleneck that faces.In China, every kind of scrambling system can only adopt special-purpose descrambling receiver at present.In order to solve the versatility problem, the CI technology is promoted to the whole nation as the recommended standard.
In brief, in above-mentioned two kinds of schemes, to be manufacturer because different type, the corresponding software of exploitation need be provided the different scrambling system in each department cause the problem of single CA pattern that software design drops into is huge, cost is high, be difficult to large-scale production; And the CI pattern has increased the kilocalorie cost, and contradiction has been transferred to operator by manufacturer.
At " a kind of method that realizes Digital Television/digital TV set-top box separation between machine and card " (publication number: CN1455590A), disclose a kind of method that realizes Digital Television/digital TV set-top box separation between machine and card.It is that an installation system starts software module and system loads software module when hardware product dispatches from the factory; When hardware product used, operational system started software module and system loads software module; By network installation system upgrade software, systemic-function software; Again by operation system function software, finish the various functions such as selection of descrambling to the digital signal that receives, deciphering, decoding, program.
At " a kind of technical method of realizing the digital TV set-top box separation between machine and card " (publication number: CN1642266A), disclose a kind of technical method of realizing the digital TV set-top box separation between machine and card.It adopts the technology of separation between machine and card, and the common segment in the set-top box is comprised that basic hardware and software loading module and application software module are independent, makes " machine ", and the condition receiving unit is made the upgrade version software of application software module.When set-top box inserts in a certain concrete network, by the new systems soft ware of local digital TV network automatic or manual upgrading.
At said method all is the upgrading that realizes systems soft ware by network, and the network plan of separation between machine and card lesser calorie mode promptly is provided.
Summary of the invention
In order to address the above problem, the invention provides a kind of general software descrambling method that is adapted to different scrambling systems of digital television.This method can realize that manufacturer's simplification is produced, management process, and the large-scale production digital television receiving apparatus reduces the receiving terminal for digital television product cost, realizes Digital Television industrialization, scale.
For achieving the above object, the invention provides a kind of general software descrambling method of different scrambling systems of digital television, this method may further comprise the steps: (1) powers on system, and operational system starts software module, finishes system initialization; (2) system's operation application software module; (3) read the CA information of smart card, discern current scrambling system automatically, judge to have the descrambling software module that is complementary in the descrambling software module storehouse? if not, execution in step (5); (4) if then described application software module automatically activates the descrambling software module that is complementary, and finishes the selection function of descrambling to the digital signal that receives, deciphering, decoding, program; (5) eject the human-computer dialogue window, the prompting user requires to provide software upgrading to manufacturer; (6) re-power operational system after the software upgrading.
According to described method, wherein, the step of the current scrambling system of described automatic identification comprises: (1) judges whether described smart card inserts; (2) interface equipment activates the contact; (3) receiver sends reset signal to described smart card; (4) described smart card is made resetting and being replied; (5) between described smart card and described interface equipment, carry out information exchange continuously.。
According to described method, wherein, software upgrading is enabled the system loads software module by the human-computer dialogue window in the described application software module and is realized.
According to described method, in step (3), by the current scrambling system of manual setting.
According to described method, wherein, described smart card resets according to ISO7816-1, and 2,3,4 standard agreements carry out.
According to described method, wherein, described smart card is made the step of replying and is comprised to resetting:
(1) sets up the reset mode tabulation; (2) inquiry that resets obtains the response message that resets; (3) analyze the described response message that resets, judge the encryption system that described smart card is affiliated.
Because the present invention adopts above technical scheme, has realized the general software descrambling of different scrambling systems of digital television, has simplified the production procedure of manufacturer.Make manufacturer only need produce the universal product in the whole nation and get final product, and need not to consider to develop, descrambling software that installation matches with different regions digital tv network scrambling system, universal software will adapt to scrambling system automatically.Avoided manufacturer to drop into huge fund overlapping development corresponding software; production procedure, the management process of manufacturer have been simplified; reduced whole cost, also saved simultaneously kilocalorie cost, made production scaleization, the industrialization of Digital Television because of adopting the CI pattern to increase.
The present invention has the following advantages:
Solve the problem that the product that adopts single CA pattern is difficult to adapt to the different scrambling system of domestic each department network, made manufacturer can give full play to the advantage of self, formed industry size, optimized the structure of production, improved resource utilization.
Can avoid simultaneously kilocalorie cost, reduce the operation cost of Virtual network operator, reduce risks, can promote the large tracts of land of Digital Television to promote, accelerate the Digital Television industrialization process because of adopting the CI pattern to increase.
Description of drawings
Fig. 1 is the basic principle block diagram of scrambling system;
Fig. 2 is the basic principle block diagram according to the inventive method;
Fig. 3 is the correlation figure according to each software module of the inventive method;
Fig. 4 is flow chart according to an embodiment of the invention.
Embodiment
The invention provides a kind of general software descrambling method of different scrambling systems of digital television, below describe this method in detail.
At first, on ordinary numbers radiovisor with standard C A intelligent card interface, the systems soft ware of packing into, thus constitute universal receiving system.This systems soft ware comprises system start-up software module, system loads software module and system software module, also comprises multiple descrambling software module storehouse (Multi-CAS).Wherein, system start-up software module is mainly used in the startup and the initialization of systems soft ware; The system loads software module is mainly used in the maintenance and the upgrading of systems soft ware; The system software module is mainly used in and realizes various user functions; And multiple descrambling software module storehouse can cover domestic most of CA system, for example IRDETO, CONAX, VIACCESS and Tsing Hua Tong Fang, the Union of Central Vision, logical, the digital video signal receiving system of calculation.
After treating universal receiving system start, demand according to this area digital TV network scrambling system, from multiple descrambling software module storehouse (Multi-CAS), activate the descrambling software module that is complementary with current scrambling system automatically, enter normal operating condition, thereby convert to automatically and the corresponding tailored version receiving system of current network, and then realize various user functions, for example program selection and editor, EPG (electronic program guides), program audience reservation, VOD (play-on-demand program), stock and data message receive demonstration, software upgrading and recreation.
Following with reference to Fig. 4, the example explanation is according to the specific implementation process of the general software descrambling method of different scrambling systems of digital television of the present invention, wherein, multiple descrambling software module storehouse comprises the descrambling function library of multiple interference blanking system (CAS), with the concrete interference blanking system (CAS) of reply heterogeneous networks.And operation is called by the common segment of systems soft ware in multiple descrambling software module storehouse.Idiographic flow is as follows:
(1) system is powered on, operational system starts software module, finishes system initialization;
(2) system's operation application software module, this moment, system's operation was normal;
(3) user receives CA in the smart card insertion receiver card slot, reads the CA information that the user receives smart card, discerns current scrambling system automatically, judge to have the descrambling software module that is complementary in the descrambling software module storehouse? if not, execution in step (5);
(4) if application software module automatically activates the descrambling software module that is complementary, and finishes the various functions such as selection of descrambling to the digital signal that receives, deciphering, decoding, program;
(5) eject the human-computer dialogue window, the prompting user requires to provide software upgrading to manufacturer;
(6) software upgrading can be enabled the upgrading that the system loads software module realizes systems soft ware by the human-computer dialogue window in the application software module; Re-power operational system after the software upgrading.
Wherein, among step (3), also can be by the current scrambling system of manual setting.
In addition, when user's switching digital TV network, also can make receiving system convert another kind of tailored version to, realize the descrambling of different scrambling systems by identification or manual setting automatically from a kind of tailored version.
Multiple descrambling software module of the present invention storehouse comprises the automatic identification module of multisystem.The automatic identification module of this multisystem can insert the smart card of different encryption systems, to load corresponding descrambling software module storehouse.Can judge it is the card insertion of which system by the reset answer (ATR) of identification different intelligent card.
The operation principle of the automatic identification module of multisystem:
Though smart card (IC-card) is of a great variety, all there is certain difference in the definition of function, contact, read-write in different IC-cards aspect machine-processed, and they all observe ISO7816-1 jointly, 2,3,4 standard agreements, that be shaped on direct relation with IC card reading and writing machine is ISO7816-2,3 agreements.The workflow that IC-card is inserted into draw-in groove is as follows:
(1) judges whether card inserts;
(2) interface equipment " activation " contact;
(3) Ka reset (Reset);
(4) reply (the Answer To Reset) of card to resetting;
(5) between card and interface equipment, carry out information exchange continuously.
Receiver judges by snapping into a contact whether card is arranged in the draw-in groove, has inserted draw-in groove if receiver is found card, just sends reset signal by the RST reset contact to card.Be stuck in receive reset signal after, spread out of reset answer ATR i.e. " Answer To Reset " according to the regulation of ISO-7816 (3) to receiver, send the information such as program voltage of communicatory host-host protocol, data format and card inside to receiver.According to the agreement of ISO-7816 (3), reset answer has two kinds, is respectively " T=0 " and " T=1 ", and the former is " positive logic " agreement, for encryption systems such as Viaccess use; The latter is " negative logic " agreement, for systems such as Nagravision use.The information of reset answer part is not encrypted, because ISO-7816 predetermined data structure is open, it does not contain and the relevant any content of TV deciphering yet.After the reset answer of card was sent, receiver just can correctly be set up and the informational linkage that blocks.After this, receiver no longer sends reset signal, and card is also only waited for passively and received the request command that transmits from receiver, and corresponding response is made in order.Only find to insert again after card is pulled out, just can send reset signal once more, cause the reset answer-ATR of card again when receiver.
The following describes the implementation method of the automatic identification module of multisystem:
The response message that smart card resets is the key of identification card, sets up one group of reset mode tabulation according to the operation principle that resets of different system smart card, the inquiry that resets, thus obtain the response message that resets.When forward part main flow encryption system smart card communication protocol as follows:
Data bit check digit position of rest operating frequency
IRDETO 8bit none 1stop 6Mhz
CONAX 8bit even 1/1.5stop 3Mhz
VIACCESS 8bit odd 2stop 3Mhz
SECA 8bit even 2stop 3Mhz
CryptoWorks?8bit Even， 2stop 3Mhz
NAGRA 8BIT none 2stop 3Mhz
Therefore can sort out combination to the repositioning information of different encryption system cards and set up the reset mode tabulation:
Reset clock just/anti-phase parity check position of rest
CA_RESET_CLOCK_3M|CA_RESET_DIRECT|CA_RESET_PARITY_8E15，
CA_RESET_CLOCK_3M|CA_RESET_INVERSE|CA_RESET_PARITY_8E15，
CA_RESET_CLOCK_6M|CA_RESET_DIRECT|CA_RESET_PARITY_8N15，
CA_RESET_CLOCK_6M|CA_RESET_INVERSE|CA_RESET_PARITY_8N15，
The analysis of repositioning information: each successful reset operation all can cause an original character TS on the I/O, and the back can be got in touch with maximum 32 characters are arranged:
-T0............... layout character (pressure)
-TAi, TBi, TCi, TDi... interface character (optional)
-T1, T2 ..., the historical character (optional) of TK......
-TCK............... detects character (optional)
Reset
As example, below analyze the response message that resets of VIACCESS:
VIACCESS：3F?77?18?25?00?29?14?00?62?68?90?00
3F?Inverse?convention
27?TB1?transmitted，7?historical?bytes，
TA1?non?transmitted-F＝372D＝1
17?TB1-Vpp＝23V，25MA，
TC1?non?transmitted-Guard?Delay＝0
TD1?non?transmitted-Protocol?T＝0?asynchronous?half-duplex?in?9600bds
C4?01?2C?29?14?00?62?68?historical?bytes
Again for example, the ATR of SECA system is:
Data：0x3b，0xF7，0x11，0x00，0x01，0x40，0x96，0x00，0x00，0x00，0x0E，0x6C，0xB6，0xD6
Match：0xff，0xff，0xff，0xff，0xff，0xff，0xff，0x00，0x00，0x00，0xff，0xff，0xff，0xff，0xff，0xff
Again for example, the ATR of Cryptorworks system is:
Data：0x3b，0x78，0x12，0x00，0x00，0x00，0xc4，0x00，0x00，0x8f，0xfl
Mach：0xff，0xff，0xff，0xff，0xff，0x00，0xff，0x00，0x00，0xff，0xff，0xff
As seen, reset answer in the different encryption systems is different, therefore can go out the smart card that is inserted according to different ATR and historical byte analysis is any encryption system, thereby, realize that the receiving terminal for digital television product can adapt to different digital TV network scrambling system by the software module that starts the module loading different system.
General software descrambling method according to different scrambling systems of digital television of the present invention, in use, can be according to other autgmentabilities such as the functional requirement of ardware feature and operator, scrambling demands, by the multiple descrambling software module of network upgrade storehouse (Multi-CAS) and system software module, to adapt to the digital TV network system of continuous development.
This method can make manufacturer when producing; needn't consider the scrambling system that each department are different again; only needing to produce ripe digital television receiving apparatus gets final product; so just can simplify production procedure, the management process of manufacturer greatly; alleviate the huge input of manufacturer's software overlapping development; the kilocalorie cost that also can avoid adopting the CI pattern simultaneously and increase, thus the whole cost of Digital Television reduced, make Digital Television really realize scale, industrialization.
The general software descrambling method of different scrambling systems of digital television provided by the invention, be not only applicable to cable television digital set-top box, suitable equally for satellite digital television receiver set top box, terrestrial DTV set-top box and integrated digital television set, to " the machine card separates firmly " (as: CI pattern) also is a strong support, and it helps the variation of receiving terminal for digital television.
Claims (6)
1. the general software descrambling method of a different scrambling systems of digital television, this method may further comprise the steps:
(1) system is powered on, operational system starts software module, finishes system initialization;
(2) system's operation application software module;
(3) read the CA information of smart card, discern current scrambling system automatically, judge to have the descrambling software module that is complementary in the descrambling software module storehouse? if not, execution in step (5);
(4) if then described application software module automatically activates the descrambling software module that is complementary, and finishes the selection function of descrambling to the digital signal that receives, deciphering, decoding, program;
(5) eject the human-computer dialogue window, the prompting user requires to provide software upgrading to manufacturer;
(6) re-power operational system after the software upgrading.
2. the step of the current scrambling system of the method for claim 1, wherein described automatic identification comprises:
(1) judges whether described smart card inserts;
(2) interface equipment activates the contact;
(3) receiver sends reset signal to described smart card;
(4) described smart card is made resetting and being replied;
(5) between described smart card and described interface equipment, carry out information exchange continuously.。
3. the method for claim 1, wherein described software upgrading is enabled the system loads software module by the human-computer dialogue window in the described application software module and is realized.
4. the method for claim 1 in step (3), is set current scrambling system by craft.
5. method as claimed in claim 2, wherein, described smart card resets according to ISO7816-1, and 2,3,4 standard agreements carry out.
6. method as claimed in claim 2, wherein, described smart card is made the step of replying and is comprised to resetting:
(1) sets up the reset mode tabulation;
(2) inquiry that resets obtains the response message that resets;
(3) analyze the described response message that resets, judge the encryption system that described smart card is affiliated.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102075808A (en) * | 2011-01-25 | 2011-05-25 | 四川长虹电器股份有限公司 | Method for realizing multi-conditional access (CA) coexistence in set top box |
| CN103986950A (en) * | 2014-05-12 | 2014-08-13 | 青岛海信电器股份有限公司 | Descrambling mode control method, device and equipment |
| CN103997678A (en) * | 2014-04-24 | 2014-08-20 | 深圳创维－Rgb电子有限公司 | Multi-CAS seamless switching method and multi-CAS seamless switching system |
| CN104581318A (en) * | 2015-01-22 | 2015-04-29 | 青岛海信宽带多媒体技术有限公司 | Method and terminal capable of achieving dynamic plug response of intelligent card |
| CN105282590A (en) * | 2015-09-17 | 2016-01-27 | 国家新闻出版广电总局广播电视规划院 | Set top box |
| CN105516797A (en) * | 2015-12-14 | 2016-04-20 | 福建新大陆通信科技股份有限公司 | Control method and device supporting multi-CA (Certification Authority) of cable set-top box |
| CN108574865A (en) * | 2018-03-30 | 2018-09-25 | 青岛海信电器股份有限公司 | The scramble process method, apparatus and terminal of terminal |
| CN111654750A (en) * | 2015-09-01 | 2020-09-11 | 耐瑞唯信有限公司 | Method and device for transmitting video stream between host device and electronic descrambling device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102075808A (en) * | 2011-01-25 | 2011-05-25 | 四川长虹电器股份有限公司 | Method for realizing multi-conditional access (CA) coexistence in set top box |
| CN103997678A (en) * | 2014-04-24 | 2014-08-20 | 深圳创维－Rgb电子有限公司 | Multi-CAS seamless switching method and multi-CAS seamless switching system |
| CN103997678B (en) * | 2014-04-24 | 2017-01-18 | 深圳创维－Rgb电子有限公司 | Multi-CAS seamless switching method and multi-CAS seamless switching system |
| CN103986950A (en) * | 2014-05-12 | 2014-08-13 | 青岛海信电器股份有限公司 | Descrambling mode control method, device and equipment |
| CN104581318A (en) * | 2015-01-22 | 2015-04-29 | 青岛海信宽带多媒体技术有限公司 | Method and terminal capable of achieving dynamic plug response of intelligent card |
| CN104581318B (en) * | 2015-01-22 | 2017-11-17 | 青岛海信宽带多媒体技术有限公司 | Realize the method and terminal of smart card dynamic plug response |
| CN111654750A (en) * | 2015-09-01 | 2020-09-11 | 耐瑞唯信有限公司 | Method and device for transmitting video stream between host device and electronic descrambling device |
| CN111654750B (en) * | 2015-09-01 | 2022-05-24 | 耐瑞唯信有限公司 | Method and device for transmitting video stream between host device and electronic descrambling device |
| CN105282590A (en) * | 2015-09-17 | 2016-01-27 | 国家新闻出版广电总局广播电视规划院 | Set top box |
| CN105282590B (en) * | 2015-09-17 | 2018-10-12 | 国家新闻出版广电总局广播电视规划院 | Set-top box |
| CN105516797A (en) * | 2015-12-14 | 2016-04-20 | 福建新大陆通信科技股份有限公司 | Control method and device supporting multi-CA (Certification Authority) of cable set-top box |
| CN108574865A (en) * | 2018-03-30 | 2018-09-25 | 青岛海信电器股份有限公司 | The scramble process method, apparatus and terminal of terminal |
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