CN1867066A - Digital television program broadcasting system and method - Google Patents
Digital television program broadcasting system and method Download PDFInfo
- Publication number
- CN1867066A CN1867066A CN 200510070873 CN200510070873A CN1867066A CN 1867066 A CN1867066 A CN 1867066A CN 200510070873 CN200510070873 CN 200510070873 CN 200510070873 A CN200510070873 A CN 200510070873A CN 1867066 A CN1867066 A CN 1867066A
- Authority
- CN
- China
- Prior art keywords
- digital television
- portable terminal
- mobile communications
- communications network
- management system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The invention relates to a system for displaying digital TV program and relative method. Wherein, said system is formed by a digital TV display system and a mobile terminal; the digital TV display system is formed by connected broadcast television network and content producing system; the content producing system transmits the data of digital television program to the broadcast television network to be displayed; the mobile terminal receives, decodes and displays the digital television signal; the content producing system and the broadcast television network have a version manage system between them; the version manage system encrypts the digital television program data of content producing system and via the mobile communication network sends the key to the mobile terminal, or check the authority of user information sent from the mobile communication network. The invention uses digital television broadcast network to send digital television program, without occupying the mobile bandwidth, while it supports the real-time display.
Description
Technical field
The present invention relates to a kind of digital television program playing system and method; particularly a kind of towards portable terminal; and can when digital television broadcasting, realize the system and method for digital television program charging, encryption and protection is belonged to the mobile communication technology field.
Background technology
Digital television techniques is meant in the overall process of collection in TV programme, making, editor, broadcast, transmission, reception and all adopts digital technology to handle.Be used for equipment that digital program makes at present and mainly contain digital camera and digital camera, computer, digital editing machine, digital caption machine etc.; The technology that is used for Digital Signal Processing has Digital Signal Processing, compression, decompress(ion), zoom technology etc.; The transmission means of digital television program comprises: terrestrial broadcasting transmission, cable TV (or optical cable) transmission, satellite broadcasting (DSS) and broad band Integrated service net (ISDN), DVD etc.The equipment that is used to receive demonstration has: cathode-ray tube display (CRT), LCD, plasma scope, Projection Display (comprising preceding throwing, rear-projection) etc.
In order to realize that Conditional Access (CA) technology is adopted in digital television broadcasting usually by pay per channel, by pay per view, by the purpose of rating number of times charge; After promptly utilizing digitizing technique that program is handled, utilize conditional access system that the data flow of TV programme is carried out encryption, and auxiliary with ciphering control message.User's the authority of watching so just can be set, the function of utilizing the interior smart card of placing of subscriber computer top box to realize watching pay TV by user's paying situation respectively.While also makes the disabled user, the paying customer can not watch pay TV, has guaranteed that the rights and interests of television program designing merchant and validated user are not encroached on.
For the content that prevents digital television program is used without restriction, can be when authorized user uses, define its occupation mode to content, and to limiting service time or number of times, can adopt digital copyright management (DRM) technology, that is: each links such as distribution, transmission and use of digital product be controlled, make that digital product can only be by the people who is authorized to use, according to the mode of authorizing, in the time limit of licensing, use.The strictness of drm agent agent software is followed the mode and the condition of these restrictions and is managed protected digital television program content.
In order to prevent that the digital television program content from being distributed arbitrarily; can adopt two kinds of following methods: the one, allow the user can't directly obtain protected digital television program content; that is: will be received within the subscriber terminal equipment protected region of memory in the digital television program, protected digital television program content can only could be visited by special software (drm agent agent software) in this memory block.Another method is to preserve behind the digital television program content-encrypt, and password is deposited separately, and other softwares can't be visited; And when the above-mentioned digital television program of the legal use of the people who is authorized to use, must interim decryption content.
In order to prevent that the digital television program content from being revised arbitrarily, then can forbid user's modification digital television program content, to forbid also that simultaneously it duplicates the digital television program content.
The existing digital television techniques that can realize above-mentioned every function mainly is the digital television techniques towards the television set terminal.The characteristics of this technology are: digital television program broadcast side sends to the digital television program broadcast singal user's television set.This television set is a digital receiver, or is combined by digital TV set-top box and simulated television.In this case, television set can only be arranged on fixed position, or in being installed in the vehicles.Need the power supply power supply, can not carry.
Along with the development of mobile communication technology, arise at the historic moment towards the digital television techniques of portable terminal.Its implementation has two kinds:
The one, utilize radio network to send TV signal to portable terminal with receiving digital television broadcast signal, make this portable terminal can receive TV programme in real time.Because it is a kind of unidirectional process that radio network sends TV signal to portable terminal, does not receive the information that the user returns, and in this manner, provides the operator of digital television program to charge to digital cable customers; On the other hand, owing to can not encrypt the digital television signal that sends, all portable terminals with digital television signal receiving ability can receive the digital television program of broadcasting; Simultaneously, the transmission of electronic program list also is a kind of unidirectional process, is sent according to certain rule by radio network, and can not include User Status and demand in reference factor.
The 2nd, mobile operator utilizes the wireless Internet access technology, and for example GPRS, CDMA realize the relay to digital television signal.In fact, this still belongs to traditional stream media technology category, busy channel bandwidth not only, and professional service quality is subjected to the restriction of channel condition to a great extent.Such as: the British patent (GB2405297) that name is called " CONTENT DATA SCHEDULING USING SCHEDULE DATA TRANSMITTED VIA AMOBILE COMMUNICATION NETWORK " has disclosed a kind of like this technical scheme: this technology can support that the user watches Digital Television by portable terminal.And content supplier is at the off-peak period of network traffics, for example: night, TV programme is downloaded in the memory device, and then television programme data is transferred on the portable terminal, and these data " are locked ".In this case, the user can't appreciate " locking " TV programme afterwards, unless content supplier sends " release " signal to mobile phone.The effect of this technical scheme is: mobile phone users can obtain up-to-date TV programme in advance, but just can watch when only receiving " release " signal.So just can prevent that the user from televiewing in advance.In this manner, can realize the billing function of mobile TV, and can guarantee that television content is not by malicious modification; But there is following defective in above-mentioned technical scheme: 1, this Technology Need takies mobile bandwidth, can only be applicable to 2.5G or 3G communication network and portable terminal; 2, this technology is subjected to the influence of communication network peak value and other communication service, is difficult to the effect that guarantees that content of TV program is play in real time.
Therefore, the present digital television techniques based on portable terminal can't satisfy following condition simultaneously:
1, the content that prevents digital television program is used without restriction;
2, prevent that the digital television program content from being distributed arbitrarily, duplicating and revising;
3, guarantee to watch in real time the effect of digital television program.
Summary of the invention
Main purpose of the present invention provides a kind of Play System and method of digital television program, is applicable to that mobile phone users watches real-time digital television program, and does not take too much channel resource; Be not subjected to the restriction of mobile communications networks such as 2G, 3G yet.
Another object of the present invention provides a kind of Play System and method of watching digital television program, is applicable to when mobile phone users is watched digital television program, makes things convenient for the charging and the charge of digital television program.
Another purpose of the present invention provides a kind of Play System and method of digital television program, the digital television program supplier can prevent effectively that based on this method the content of digital television program from being used without restriction, prevents that the digital television program content from being distributed arbitrarily, duplicating and revising.
For achieving the above object, the invention provides a kind of digital television program playing system, constitute by digital television broadcasting system and portable terminal; Described digital television broadcasting system is interconnected to constitute by television network broadcast and content production system, content production system sends to television network broadcast with the digital television program data, and broadcasts after by described television network broadcast this television programme data being treated to digital television signal; The digital television signal that described portable terminal receiving digital television Play System sends, and described digital television signal decoded and play; Also be provided with copyright management system between described content production system and the television network broadcast, described copyright management system is used for the digital television program data that content production system sends are encrypted and by mobile communications network key information sent to portable terminal, and perhaps the user request information that mobile communications network is sent carries out authentication.
Wherein, be provided with the interactive TV gateway between described copyright management system and the mobile communications network; Described interactive TV gateway is communicated by letter with mobile communications network with copyright management system respectively; Be used to finish the conversion of communication protocol between copyright management system and the mobile communications network.
The present invention also provides a kind of method of playing based on the digital television program of said system, copyright management system receives the digital television program data that sent by content production system, after these digital television program data are encrypted the encrypted digital TV program data are sent to television network broadcast, described television network broadcast is to broadcast behind the digital television signal with described digital television program data processing; When receiving described digital television signal by portable terminal and playing TV programme, carry out following steps:
Step 1, portable terminal send the request of watching digital television program to mobile communications network, and mobile communications network sends to copyright management system with described request;
If step 3 is by authentication, then copyright management system is used for key information that digital television programme data is decrypted with generation, and this key information is sent to portable terminal by mobile communications network; Otherwise, by mobile communications network notice portable terminal failed authentication;
After step 4, described portable terminal receive described key information, with this key information the digital television signal that receives is decrypted, the digital television program after will deciphering is then decoded, is play.
Also comprise the step that electronic program list obtains before the described step 1, be specially: portable terminal sends the request of obtaining of electronic program list to content production system by mobile communications network; Content production system sends to portable terminal with electronic program list by mobile communications network.
In the described step 3, the step that described copyright management system generates key information comprises: according to the cryptographic algorithm that digital television programme data is carried out encryption, generate key and copyright regular data, and be key information with key and copyright principle combinations.
After described copyright management system sent to portable terminal with described key information, to the charge system transmission charging message of described mobile communications network, described charge system was chargeed according to charging regulation.
According to technique scheme as can be known, the present invention is different from traditional wireless Internet access mode, sends digital television program by digital TV broadcasting network, do not take the mobile communications network bandwidth, support the real-time broadcast of digital television program, and do not need mass-memory unit, reduced cost; Simultaneously, adopt authentication and key, prevented that effectively the content of digital television program from being used without restriction, and can realize that the interaction of effective charging and electronic program list sends by mobile communications network.
Below the present invention is described in further detail by accompanying drawing and specific embodiment.
Description of drawings
Fig. 1 watches the system schematic of digital television program for the present invention realizes mobile communication terminal;
Fig. 2 watches the flow chart of digital television program for the present invention realizes mobile communication terminal.
Embodiment
Referring to Fig. 1, be concrete implementation system schematic diagram of the present invention, comprising content production system 1, television network broadcast 2, portable terminal 3; Television network broadcast 2 and content production system 1 common formation digital television broadcasting system, further, this digital television broadcasting system also comprises copyright management system 4 and interactive TV gateway 5; Digital television broadcasting system is communicated by letter with portable terminal 3 by mobile communications network 6.
Wherein, portable terminal 3 is realized the reception of encrypted digital TV program by television network broadcast 2.This function is realized by content production system 1, copyright management system 4, television network broadcast 2 and portable terminal 3.
Content production system 1 is obtained original program content from the content source (not shown), and original program content is edited, sorted, and generates unencrypted digital television program data, generates corresponding electronic program list simultaneously.Wherein, content production system 1 can be obtained original program content by following dual mode from the content source (not shown):
A, programme content are recorded on the tape, and content production system reads program from tape;
B, receive signal in real time by microwave mode.Content production system 1 is treated to original program content the digital television program data and sends to television network broadcast.
Digital television program data processing after the encryption that television network broadcast 2 will receive is a digital television signal, send broadcast singal to portable terminal 3 by terrestrial wireless transmission system and/or sts satellite transmission system, this broadcast singal transmission standard can adopt handheld terminal digital video-frequency broadcast standard (DigitalVideo Broadcasting-Handheld, be called for short: DVB-H), digital multimedia broadcast (dmb) via satellite standard (Satellite Digital Multimedia Broadcasting, be called for short: S-DMB), T-DMB standard (Terrestrial Digital MultimediaBroadcasting, be called for short: T-DMB) or the unidirectional forward link standard of medium (Media Forward LinkOnly is called for short: Media FLO).
The method that the present invention also provides a kind of digital television program to play, copyright management system receives the digital television program data that sent by content production system, send to television network broadcast after these digital television program data are encrypted, described television network broadcast is to broadcast behind the digital television signal with described digital television program data processing; When the user receives described digital television signal and TV reception by portable terminal,, carry out following steps referring to Fig. 2:
Step 1, portable terminal send the request of watching digital television program to mobile communications network, and mobile communications network sends to copyright management system with described request;
If step 3 is by authentication, then copyright management system is used for generation the key information that digital television programme data is decrypted and this key information is sent to portable terminal by mobile communications network; Otherwise, by mobile communications network notice portable terminal failed authentication;
After step 4, portable terminal receive described key, the digital television signal that receives is decrypted with this key; TV programme after will deciphering is then decoded, is play.
Wherein, the concrete steps of performing step 1 are:
Step 101, portable terminal are selected the program in the television network broadcast;
Step 102, portable terminal send the request of watching selected digital television program to mobile communications network;
Step 103, mobile communications network send to copyright management system with described request by the interactive TV gateway.
Wherein, in step 103, mobile communications network sends the request of watching selected digital television program by http protocol, short message protocol or multimedia message protocol to the interactive TV gateway; The interactive TV gateway sends the request of watching selected digital television program by ICP/IP protocol to copyright management system.
The concrete steps of performing step 3 are:
Step 301, authentication are passed through, execution in step 302; Otherwise, execution in step 304;
Step 302, copyright management system generate key and copyright regular data according to the cryptographic algorithm that digital television programme data is carried out encryption, and are key information with key and copyright principle combinations.
Step 303, copyright management system send to the interactive TV gateway with key information;
Step 304, copyright management system send to the interactive TV gateway with failed authentication information;
Step 305, interactive TV gateway according to the communication mode of determining and path to the information that receives carry out the corresponding protocol coupling (such as, http protocol, short message protocol or multimedia message protocol);
Data message after step 306, interactive TV gateway will mate by corresponding path (such as, WAP gateway, sms center or MMS center) send to portable terminal.
Wherein, in step 303 and 304, copyright management system sends to the interactive TV gateway by ICP/IP protocol with key information or failed authentication information; In step 306, the interactive TV gateway adopts http protocol, short message protocol or multimedia message protocol with the communication protocol between the mobile communications network.
In addition, after the described copyright management system of step 303 sent to portable terminal with described key information, to the charge system transmission charging message of described mobile communications network, described charge system was chargeed according to charging regulation.
The step that also had electronic program list to obtain before step 1 is beneficial to the selection that the user carries out current digital television program, is specially: portable terminal sends the request of obtaining of electronic program list to content production system by mobile communications network; Content production system sends to portable terminal with electronic program list by mobile communications network.In the present embodiment, can adopt following steps:
A, portable terminal send the request of obtaining of electronic program list to the interactive TV gateway by mobile communications network;
B, interactive TV gateway send request and obtain electronic program list to content production system with content production system communication;
C, interactive TV gateway send to portable terminal with electronic program list by mobile communications network.
In this process, the interactive TV gateway can pass through WAP gateway, sms center, MMS center or direct and communication of mobile terminal, carries out the transmission of electronic program list.
In addition, portable terminal can also adopt with obtaining the similar scheme of electronic program list and realize participating in the program question and answer with the digital television program real-time interactive by mobile communications network among the present invention, and is chargeed by copyright management system.
It should be noted that at last: above embodiment only in order to the explanation the present invention and and unrestricted technical scheme described in the invention; Therefore, although this specification has been described in detail the present invention with reference to each above-mentioned embodiment,, those of ordinary skill in the art is to be understood that, still can make amendment or be equal to replacement the present invention, and not break away from the spirit and scope of the present invention.
Claims (14)
1, a kind of digital television program playing system is made of digital television broadcasting system and portable terminal; Described digital television broadcasting system is interconnected to constitute by television network broadcast and content production system, content production system sends to television network broadcast with the digital television program data, and broadcasts after by described television network broadcast this television programme data being treated to digital television signal; The digital television signal that described portable terminal receiving digital television Play System sends, and described digital television signal decoded and play; It is characterized in that:
Also be provided with copyright management system between described content production system and the television network broadcast, described copyright management system is used for the digital television program data that content production system sends are encrypted and by mobile communications network key information sent to portable terminal, and perhaps the user request information that mobile communications network is sent carries out authentication.
2, system according to claim 1 is characterized in that: be provided with the interactive TV gateway between described copyright management system and the mobile communications network; Described interactive TV gateway is communicated by letter with mobile communications network with copyright management system respectively, is used to finish the conversion of communication protocol between copyright management system and the mobile communications network.
3, system according to claim 2 is characterized in that: described interactive TV gateway adopts ICP/IP protocol with the communication protocol between the copyright management system.
4, system according to claim 2 is characterized in that: described interactive TV gateway adopts http protocol, short message protocol or multimedia message protocol with the communication protocol between the mobile communications network.
5, system according to claim 1 is characterized in that: described television network broadcast broadcasts described digital television signal by terrestrial wireless transmission system and/or sts satellite transmission system.
6, system according to claim 1 or 5 is characterized in that: described digital television signal transmission standard adopts DVB-H standard, S-DMB standard, T-DMB standard or Media FLO standard to broadcast.
7, a kind of method of digital television program broadcast, it is characterized in that: copyright management system receives the digital television program data that sent by content production system, after these digital television program data are encrypted the encrypted digital TV program data are sent to television network broadcast, described television network broadcast is to broadcast behind the digital television signal with described digital television program data processing; When receiving described digital television signal by portable terminal and playing TV programme, carry out following steps:
Step 1, portable terminal send the request of watching digital television program to mobile communications network, and mobile communications network sends to copyright management system with described request;
Step 2, described copyright management system carry out authentication according to described request to user request information;
If step 3 is by authentication, then copyright management system is used for key information that digital television programme data is decrypted with generation, and this key information is sent to portable terminal by mobile communications network; Otherwise, by mobile communications network notice portable terminal failed authentication;
After step 4, described portable terminal receive described key information, with this key information the digital television signal that receives is decrypted, the digital television program data after will deciphering are then decoded, are play.
8, method according to claim 7, it is characterized in that: in the step 3, the step that described copyright management system generates key information comprises: according to the cryptographic algorithm of digital television programme data being carried out encryption, generate key and copyright regular data, and be key information key and copyright principle combinations.
9, according to claim 7 or 8 described methods, it is characterized in that: in the step 3, described copyright management system sends to the interactive TV gateway with key information, the interactive TV gateway carries out the corresponding protocol coupling according to communication mode of determining and path to the information that receives, and the data message after the coupling is sent to portable terminal.
10, method according to claim 9 is characterized in that: described interactive TV gateway adopts ICP/IP protocol with the communication protocol between the copyright management system.
11, method according to claim 9 is characterized in that: described interactive TV gateway adopts http protocol, short message protocol or multimedia message protocol with the communication protocol between the mobile communications network.
12, method according to claim 7 is characterized in that: also comprise before the described step 1: portable terminal sends the request of obtaining of electronic program list to content production system by mobile communications network; Content production system sends to portable terminal with electronic program list by mobile communications network.
13, method according to claim 7, it is characterized in that: after described copyright management system sends to portable terminal with described key information, charge system to described mobile communications network sends charging message, and described charge system is chargeed according to charging regulation.
14, method according to claim 8 is characterized in that: described copyright regular data is used to control described portable terminal and utilizes described key to play the mode of described digital television program.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510070873 CN1867066A (en) | 2005-05-20 | 2005-05-20 | Digital television program broadcasting system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510070873 CN1867066A (en) | 2005-05-20 | 2005-05-20 | Digital television program broadcasting system and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1867066A true CN1867066A (en) | 2006-11-22 |
Family
ID=37425922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510070873 Pending CN1867066A (en) | 2005-05-20 | 2005-05-20 | Digital television program broadcasting system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1867066A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008086714A1 (en) * | 2006-12-30 | 2008-07-24 | Zte Corporation | A method and system for realizing safety of cipher key in multi-network fusion mobile multi-media broadcasting system |
| CN101237496B (en) * | 2007-02-01 | 2010-10-13 | 中国移动通信集团公司 | Interactive service terminal, realization system and method |
| CN101499901B (en) * | 2008-02-01 | 2011-08-17 | 中国移动通信集团公司 | Method, terminal and television broadcast server for sending request from triggering terminal to mobile server |
| CN101753965B (en) * | 2008-12-04 | 2011-09-28 | 中国移动通信集团公司 | Charging method and system of mobile television and user identification module and equipment |
| CN102625163A (en) * | 2012-03-14 | 2012-08-01 | 深圳创维－Rgb电子有限公司 | Method and system for interaction between user and television program |
| CN102711072A (en) * | 2012-05-23 | 2012-10-03 | 华为软件技术有限公司 | Accounting method and prefetch server |
| CN103685323A (en) * | 2014-01-02 | 2014-03-26 | 中国科学院信息工程研究所 | Method for realizing intelligent home security networking based on intelligent cloud television gateway |
| CN103796037A (en) * | 2014-01-17 | 2014-05-14 | 航天数字传媒有限公司 | Copyright protection method and system based on satellite technology |
| CN105451047A (en) * | 2015-12-20 | 2016-03-30 | 天脉聚源（北京）科技有限公司 | Interactive information configuration method and device for interactive television system |
| CN113179425A (en) * | 2020-11-16 | 2021-07-27 | 北京路安世纪文化发展有限公司 | High-speed digital television signal transmission method |
-
2005
- 2005-05-20 CN CN 200510070873 patent/CN1867066A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008086714A1 (en) * | 2006-12-30 | 2008-07-24 | Zte Corporation | A method and system for realizing safety of cipher key in multi-network fusion mobile multi-media broadcasting system |
| CN101237496B (en) * | 2007-02-01 | 2010-10-13 | 中国移动通信集团公司 | Interactive service terminal, realization system and method |
| CN101499901B (en) * | 2008-02-01 | 2011-08-17 | 中国移动通信集团公司 | Method, terminal and television broadcast server for sending request from triggering terminal to mobile server |
| CN101753965B (en) * | 2008-12-04 | 2011-09-28 | 中国移动通信集团公司 | Charging method and system of mobile television and user identification module and equipment |
| CN102625163A (en) * | 2012-03-14 | 2012-08-01 | 深圳创维－Rgb电子有限公司 | Method and system for interaction between user and television program |
| CN102711072A (en) * | 2012-05-23 | 2012-10-03 | 华为软件技术有限公司 | Accounting method and prefetch server |
| CN103685323A (en) * | 2014-01-02 | 2014-03-26 | 中国科学院信息工程研究所 | Method for realizing intelligent home security networking based on intelligent cloud television gateway |
| CN103685323B (en) * | 2014-01-02 | 2016-08-17 | 中国科学院信息工程研究所 | A kind of Smart Home safe network implementation method based on intelligent cloud television gateway |
| CN103796037A (en) * | 2014-01-17 | 2014-05-14 | 航天数字传媒有限公司 | Copyright protection method and system based on satellite technology |
| CN105451047A (en) * | 2015-12-20 | 2016-03-30 | 天脉聚源（北京）科技有限公司 | Interactive information configuration method and device for interactive television system |
| CN113179425A (en) * | 2020-11-16 | 2021-07-27 | 北京路安世纪文化发展有限公司 | High-speed digital television signal transmission method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1867066A (en) | Digital television program broadcasting system and method | |
| CN1168304C (en) | Global copy protection system for digital home networks | |
| US7698568B2 (en) | System and method for using DRM to control conditional access to broadband digital content | |
| CA2623089C (en) | Method and apparatus for providing a digital rights management engine | |
| AU2004288307B2 (en) | System and method for using DRM to control conditional access to broadband digital content | |
| CN100493181C (en) | System, protection method and server for realizing the virtual channel service | |
| CN1633794A (en) | ECM and EMM distribution for multimedia multicast content | |
| CN101061666A (en) | Method for managing digital rights in broadcast/multicast service | |
| CN101076109A (en) | Two-way CA system of digital TV-set and method for ordering and cancelling programm based on it | |
| JP2003503941A (en) | Broadcast and receive messages | |
| CN101047830A (en) | Method and device for authorising conditional access | |
| CN1549595A (en) | Information transmitting method and apparatus for interactive digital broadcast television system | |
| CN103281572B (en) | The DVB conditional receiving device of integrated master data, normal data descrambling | |
| CN1258920C (en) | Secure digital content delivery system and method over broadcast network | |
| CN1725853A (en) | Method for realizing acquisition of user on-line information | |
| CN101102462A (en) | Wireless digital TV encryption communication system based on mobile phone TV safety module and its working method | |
| CN1744706A (en) | Method for protecting broadband video-audio broadcasting content | |
| CN101656583B (en) | Key management system and key management method | |
| JP4907969B2 (en) | Digital content transmission method, digital content transmission device, and digital content reception device | |
| CN101365101B (en) | Ciphering channel playing method and set-top box | |
| CN101425862B (en) | Mobile multimedia broadcast service operation management system and method | |
| CN100544429C (en) | A kind of mobile phone TV services content protecting method | |
| CN1960267A (en) | System and method for implementing prepaid services in mobile multimedia broadcast | |
| CN101442660B (en) | System for receiving download type digital television condition and dynamic download method thereof | |
| CN1852416A (en) | Method and system for realizing combined authorization of enciphering system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Open date: 20061122 |