CN101635824B - Small area control system of digital television - Google Patents
Small area control system of digital television Download PDFInfo
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- CN101635824B CN101635824B CN 200910041906 CN200910041906A CN101635824B CN 101635824 B CN101635824 B CN 101635824B CN 200910041906 CN200910041906 CN 200910041906 CN 200910041906 A CN200910041906 A CN 200910041906A CN 101635824 B CN101635824 B CN 101635824B
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Abstract
The invention discloses a small area control system of a digital television. The system comprises a demodulator, a multiplex scrambler and a modulator, wherein, the demodulator is used for receiving an existing radio frequency (RF) public television signal in a small machine room of a control region from a general front terminal and extracting program special information (PSI)/service information(SI), the multiplex scrambler is used for receiving the program special information (PSI)/service information (SI) extracted by the demodulator, modifying a network information table (NIT) and then generating area control information of the control region, and the modulator is used for receiving an output signal of the multiplex scrambler and outputting the signal after modulation. The system realizes precise small area control and management of the digital television, has high fault and calamity tolerance, high reliability and much lower cost than a receiving CA system under a building condition.
Description
Technical field
The invention belongs to the digital television broadcasting field, relate to a kind of small area control system of digital television.
Background technology
In the evolution of digital television techniques, user's district management is paid close attention to by operator always.Existing Region control scheme must be built in each control area the condition reception CA system of different parameters, sectoring function by condition reception CA system is so that the different region code of different region allocation, the realm identifier of user side is stored in the smart card, the realm identifier of region code and smart card must mate just gives user's rights of using, thereby realize user's orderly partition management, prevent the slave smart card of low charge as the transregional use of host card, avoided the large tracts of land diffusion of pirate smart card.But above-mentioned condition reception CA system Construction cost is excessive, generally can only be arranged in the large regional extent such as city, small towns, and not be suitable for the zonules uses such as residential quarter, hotel, the problem that therefore still exists smart card privately to flow in large zone.
Summary of the invention
For addressing the above problem, the invention provides that a kind of reliability is high, cost is lower, can realize the small area control system of digital television of smart keyholed back plate reason.
Small area control system of digital television provided by the invention comprises: demodulator, and the machine room that be used for to receive the zonule that will control is existing, from the RF radio frequency common signal of general headend, therefrom extracts program specific information PSI/ business information SI; Multiplexing scrambler, the program specific information PSI/ business information SI that the receiving demodulation device extracts produces Region control information after revising; Modulator receives the rear output of output signal modulation of multiplexing scrambler.
Further, the input signal of described multiplexing scrambler also comprises the local program transport stream, multiplexing scrambler has network interface, multiplexing scrambler is connected with Ethernet by described network interface, reception is from the long-range scramble information of general headend, after the local program transport stream utilizes long-range scramble information to be encrypted and Region control information multiplexing and outputing in the described modulator.
The invention has the beneficial effects as follows: the present invention can be applied in the different zones as required, the place, control point that is choosing, by access control system in parallel between distributor and blender, Region control just can be implemented, realized " the seamless insertion " of system, easily build easy-to-usely, the size of control area and position all can arrange flexibly, have really realized regional smart keyholed back plate reason; Because the public programme signal of Digital Television is provided with independently transmission by-pass in parallel, and also is provided with the security fault-tolerance treatment mechanism in the set-top box, does not affect watching of user during the control system fault, fault-tolerant superfluous calamity ability is strong; The single devices technology maturation of forming control system has very high reliability, compares with building condition reception CA system, and cost reduces greatly.
In addition, multiplexing scrambler can receive the local program transport stream, the local program transport stream can in multiplexing scrambler, encrypt and with the Region control information multiplexing after export, therefore, this control system can become the platform that intercuts of local program, can utilize the Extraordinary zone to intercut and run recoup capital outlay cost and realization profit.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples:
Fig. 1 is typical application hardware block diagram of the present invention;
Fig. 2 is the flow chart of processing procedure of the present invention.
Embodiment
With reference to Fig. 1, small area control system of digital television of the present invention comprises demodulator, multiplexing scrambler and modulator, wherein demodulator is existing for the machine room that receives the zonule that will control, from the RF radio frequency public TV signal of general headend and extract program specific information PSI/ business information SI, multiplexing scrambler is used for the program specific information PSI/ business information SI of receiving demodulation device extraction and the Region control information of the rear generation control area of making amendment, modulator is used for receiving the rear output of output signal modulation of multiplexing scrambler, and the type of modulator is selected the QAM modulator.At the place, control point that chooses, by the above-mentioned small area control system of access in parallel between distributor and blender, Region control just can be implemented, and has realized " the seamless insertion " of system, easily builds easy-to-use.
In addition, the input signal of multiplexing scrambler also comprises the local program transport stream, multiplexing scrambler has network interface, multiplexing scrambler is connected with Ethernet by described network interface, reception is from the long-range scramble information of general headend, after the local program transport stream utilizes long-range scramble information to be encrypted and Region control information multiplexing and outputing in the described modulator.Therefore, this small area control system provides the platform that intercuts of a local program signal, when needing to realize intercutting, as long as local program is uploaded in the server, remote control is broadcasted, input multiplexing scrambler with the form of TS transport stream, and multiplexing together with Region control information, and at last modulation output gets final product.
Below in conjunction with Fig. 2 control processing procedure in zonule of the present invention is described.
With reference to Fig. 2, the RF radiofrequency signal that general headend passes down utilizes distributor to distribute after entering the control area, one the tunnel as the public programme signal of Digital Television, directly deliver in the blender of rear end by bypass, one the tunnel utilizes demodulator to carry out demodulation process S2, extracts program specific information PSI/ business information SI.Comprise among the program specific information PSI/ business information SI one with this large regional extent in a corresponding network information table NIT, inserted the restricted regional descriptor of this large regional extent among the network information table NIT, in order to realize the control to this large regional extent affiliated subdistrict territory scope, S3 need to make amendment to the network information table NIT among the program specific information PSI/ business information SI, make its restricted regional descriptor corresponding with the zonule that will control, thereby produce Region control information, the modification S3 process of network information table NIT is generally carried out in multiplexing scrambler.Needing in the time of need to intercutting local program encodes to process to local program first makes it become the local program transport stream that is fit to transmission, the local program transport stream is encrypted behind the S3 and Region control information multiplexing S4, the encryption S3 of above-mentioned local program transport stream and also finish in multiplexing scrambler with the multiplexing S4 process of Region control information.Local program transport stream after multiplexing and Region control information are through ovennodulation S5 and the STB terminal of delivering to the user after the public programme signal of Digital Television is mixed S6, in wire transmission, modulation system generally adopts QAM modulation (quadrature amplitude modulation, i.e. quadrature amplitude modulation).User's set-top box extract the Region control information that receives and with smart card in the realm identifier that stores compare S8, if coupling, normal programme content is play in set-top box work, if do not mate, set-top box quits work; If because control system equipment or network failure cause set-top box not receive Region control information, set-top box can be enabled security fault-tolerance treatment S 9 mechanism, works on, and plays normal programme content.Utilize said method can realize the control of a plurality of zonules under the large regional extent, each zonule can be provided with different Region control information, corresponding with it, smart card in the zonule has different realm identifiers, therefore the smart card between the zonule can not circulate privately, thereby has realized the smart keyholed back plate reason of zonule.
Claims (2)
1. small area control system of digital television is characterized in that comprising:
Demodulator, the machine room that be used for to receive the zonule that will control is existing, from the RF radio frequency public TV signal of general headend, and therefrom extracts program specific information PSI/ business information SI;
Multiplexing scrambler, the program specific information PSI/ business information SI that the receiving demodulation device extracts produces Region control information after revising;
Modulator receives the rear output of output signal modulation of multiplexing scrambler;
The RF radio frequency public TV signal that general headend passes down utilizes distributor to distribute, one the tunnel as the public programme signal of Digital Television, directly deliver in the blender of rear end by bypass, one the tunnel utilizes demodulator to carry out demodulation process, extract program specific information PSI/ business information SI, multiplexing scrambler is made amendment to the network information table NIT among the program specific information PSI/ business information SI, make its restricted regional descriptor corresponding with the zonule that will control, thereby produce Region control information, deliver to user's STB terminal after Region control information is passed through modulators modulate and the public programme signal of Digital Television is mixed.
2. a kind of small area control system of digital television according to claim 1, the input signal that it is characterized in that described multiplexing scrambler also comprises the local program transport stream, multiplexing scrambler has network interface, multiplexing scrambler is connected with Ethernet by described network interface, reception is from the long-range scramble information of general headend, after the local program transport stream utilizes long-range scramble information to be encrypted and Region control information multiplexing and outputing in the described modulator.
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| CN 200910041906 CN101635824B (en) | 2009-08-11 | 2009-08-11 | Small area control system of digital television |
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| CN 200910041906 CN101635824B (en) | 2009-08-11 | 2009-08-11 | Small area control system of digital television |
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| CN101635824A CN101635824A (en) | 2010-01-27 |
| CN101635824B true CN101635824B (en) | 2013-03-06 |
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| CN 200910041906 Expired - Fee Related CN101635824B (en) | 2009-08-11 | 2009-08-11 | Small area control system of digital television |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101867782B (en) * | 2010-05-25 | 2013-01-23 | 华为终端有限公司 | Set-top box control method and device |
| CN103237234B (en) * | 2013-05-07 | 2014-03-26 | 江苏省广电有线信息网络股份有限公司南京分公司 | Front end of iTV (interactive television) system and VOD (video on demand) method |
| CN103905840B (en) * | 2013-12-25 | 2017-05-10 | 惠州市伟乐科技有限公司 | System and method for achieving hybrid transmission of control state information and multiple transmission streams |
| CN105516822A (en) * | 2015-12-07 | 2016-04-20 | 福建新大陆通信科技股份有限公司 | Method and system for weather voice broadcasting based on set-top box |
| CN110588690A (en) * | 2019-09-30 | 2019-12-20 | 江苏铁锚玻璃股份有限公司 | Installation method and installation structure of train television |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101431655A (en) * | 2008-12-09 | 2009-05-13 | 四川长虹电器股份有限公司 | Method for implementing zone control of digital television |
| CN201467353U (en) * | 2009-08-11 | 2010-05-12 | 中山广电视讯有限公司 | Digital television micro-region control system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1194543C (en) * | 2003-01-29 | 2005-03-23 | 邓建平 | Digital MUDS system |
| KR100566269B1 (en) * | 2003-09-25 | 2006-03-29 | 삼성전자주식회사 | Apparatus and method for simultaneously servicing a wide area broadcasting and a local area broadcasting in a digital multimedia broadcasting system and mobile terminal equipment capable of displaying the digital multimedia broadcasting |
| CN100379287C (en) * | 2005-07-29 | 2008-04-02 | 上海广电通讯网络有限公司 | Wireless distribution association mode of digital TV contents for multiple receiving terminals shared in same account |
| CN101123710A (en) * | 2007-09-20 | 2008-02-13 | 中国电子科技集团公司第五十四研究所 | Method for adjusting packet identifier in transmission flow |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101431655A (en) * | 2008-12-09 | 2009-05-13 | 四川长虹电器股份有限公司 | Method for implementing zone control of digital television |
| CN201467353U (en) * | 2009-08-11 | 2010-05-12 | 中山广电视讯有限公司 | Digital television micro-region control system |
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