CN1852420A - Method for realizing digital copyright management of altermative network TV system - Google Patents
Method for realizing digital copyright management of altermative network TV system Download PDFInfo
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Abstract
The method includes steps: content management system controls encryptor to encrypt program content of program source, and distributes playbill to electric program guidance (EPG)/operation support system; from the EPG/operation support system, user terminal obtains playbill for user to choose program to watch; after program is chosen by user, the user terminal determines whether valid permit corresponding to the program is stored locally; if yes, then through media transmission network, the user terminal obtains encrypted electric program stream, and decrypting the said electric program stream based on content cipher key included in the permit; otherwise, user terminal obtains valid permit from copyright center first and saves it locally, then obtains encrypted electric program stream through media transmission network.
Description
Technical field
The present invention relates to interactive Web TV system, relate in particular to a kind of method that in interactive Web TV system, realizes the digital copyright management business.
Background technology
IPTV (IPTV) is a kind of broadband cabled television network that utilizes, and integrates multiple technologies such as the Internet, multimedia, communication, and the brand-new technology of the multiple interactive services that comprises Digital Television is provided to the domestic consumer.Because the IPTV digital content is easy to duplicate, is easy to propagate, and when the IPTV business is brought good business experience to the user, also becomes the object that the bootlegger pays close attention to.
Digital copyright management (Digital Right Management; abbreviation DRM) purpose is the copyright of protection digital content; improve pirate technical threshold and cost technically, guarantee to have only the user that buys copyright could enjoy digital program observing under the condition of copyright rule.The major technique that digital copyright management relates to comprises Digital ID technology, safety and encryption technology, database technology, digital certificate technique etc.
In the prior art, propose to realize IPTV (IPTV DRM) system configuration of digital copyright management, as shown in Figure 1, mainly comprised following functional entity:
Program source: producing the IPTV encoder or the IPTV program request file-storage device of programme televised live stream, is the source of initial IP TV digital content;
Encryption equipment: be used for initial IP TV digital content is encrypted, encryption equipment can be a separate equipment, also can be to carry out integrated software package, hardware chip with program source, communicates by letter with program source by message;
Streaming media server: be used to deposit the request program stream file after the encryption, the electronic programming stream after will encrypting by the Media Delivery Network network sends to user terminal;
Content Management System: be used to control encryption equipment the program source content of appointment is encrypted, and the electronic program list after will encrypting sends to Electronic Program Guide (EPG)/OSS;
EPG/ OSS: be used to order programme information, charging, show the program of user's order etc.;
The copyright center: be used for the organize content key, generate licence and and terminal interaction, user terminal licenses down;
User terminal: the user searches and watches program by terminal.
Wherein, user terminal is connected with the copyright center by interface DRM1; User terminal is connected with the EPG/ OSS by interface DRM2; User terminal is connected with the Media Delivery Network network by interface DRM3; Encryption equipment is connected with the copyright center by interface DRM4; The copyright center is connected with the EPG/ OSS by interface DRM5; Content Management System is connected with encryption equipment by interface DRM6; Content Management System is connected with EPG/ operation support management system by interface DRM7; Program source is connected by interface DRM8 with encryption equipment.
But in the IPTV system, provide DRM business, need cooperate with the IPTV system.The IPTV system is provided by different manufacturers at present, and in view of the diversity of IPTV system, coupling is big between system, has hindered carrying out smoothly of IPTVDRM business.Therefore, also there is not a kind of method that can in the IPTV system, specifically implement the DRM business in the prior art.
Summary of the invention
The invention provides a kind of method that in interactive Web TV system, realizes digital copyright management, make in various interactive Web TV systems, use method provided by the invention can both realize digital copyright management.
The invention provides a kind of interactive Web TV system and realize the method for digital copyright management, described interactive Web TV system comprises: program source, Content Management System, encryption equipment, Electronic Program Guide/OSS, copyright center, Media Delivery Network network and user terminal; This method comprises:
A, Content Management System control encryption equipment are encrypted the programme content of program source, and programme are published to described Electronic Program Guide/OSS;
B, user terminal obtain programme from described Electronic Program Guide/OSS and select the program watched for the user, when the user carries out judging the local valid license that whether stores corresponding program after program selects, if having, and execution in step D then; Otherwise, execution in step C;
C, user terminal obtain licence from the copyright center, and are kept at this locality, continue step D;
D, user terminal use the content key that comprises in the described licence that the described electronic programming stream that obtains by the Media Delivery Network network is deciphered, and restore programme content.
Described steps A comprises:
A1, Content Management System are initiated the request of encrypting to encryption equipment;
A2, encryption equipment obtain electronic programming from program source and carry out encryption according to the indication information in the described encryption request;
Encryption equipment is registered to described copyright center with encrypted content key, and returns ciphered program unique identification ECID to Content Management System;
The programme that A3, Content Management System will comprise ECID is published to described Electronic Program Guide/OSS.
The encryption request that Content Management System described in the steps A 1 is initiated to encryption equipment comprises at least: file path and the filename of file to be encrypted in program source, and file path and the filename of encrypting the back file storage.
Use HTML (Hypertext Markup Language) HTTP or Simple Object Access Protocol SOAP carrying transmission data between described Content Management System and the encryption equipment.
Encryption equipment carries out encryption to electronic programming described in the steps A 2, comprising:
Encryption equipment is encrypted the program request file of specified file path and filename; Perhaps live session is described the agreement SDP file and handle, and receive live TV stream to be encrypted and encrypt;
Live SDP file after program request file after encryption equipment will be encrypted or the processing is saved in the streaming media server that is connected with the Media Delivery Network network; And the live TV stream after will encrypting directly sends to the Media Delivery Network network.
Interface between described encryption equipment and streaming media server or the Media Delivery Network network uses realtime transmission protocol RTP or transport stream TS carrying transmission data.
In the described steps A 2, encryption equipment also sends the ECID and the cryptographic algorithm title of program request or programme televised live to the copyright center; The mind-set encryption equipment returns responsive state message in the copyright.
Use HTTP or SOAP carrying transmission data between described encryption equipment and the copyright center.
Comprise described in the steps A 3 in the programme of ECID, ECID is corresponding to the numbering of the request program after encrypting or the numbering of encrypting direct broadcast band.
According to said method of the present invention, Content Management System also comprises to the interface message that Electronic Program Guide/OSS sends: the number information at copyright center under encryption identification whether the expression program is encrypted and the program.
Described step C comprises:
C11, user terminal are initiated authorization requests to Electronic Program Guide/OSS;
C12, Electronic Program Guide/OSS generate licence to the copyright center requests;
C13, copyright center generate licence, and return the trigger that comprises copyright centre address, port numbers and licence number information to Electronic Program Guide/OSS;
C14, Electronic Program Guide/OSS be to user terminal return authorization success response message, and carry described trigger;
C15, user terminal are initiated licence according to the information that comprises in the trigger to the copyright center and are obtained request;
C16, copyright center to subscription authentication after, return licence to user terminal.
Described step can also comprise by C:
C21, user terminal are initiated authorization requests to Electronic Program Guide/OSS;
C22, Electronic Program Guide/OSS return authorization result;
C23, user terminal be according to the SDP file of Authorization result to live electronic programming stream of streaming media server acquisition request or program request file correspondence, and report this locality whether the licence sign is arranged in request message;
C24, if show that this locality does not have licence in the request message, streaming media server request copyright center generates licence;
The corresponding programme information that order from Electronic Program Guide/OSS inquiring user at the copyright center generates licence, and returns the trigger that comprises copyright centre address, port numbers and licence number information to streaming media server;
Streaming media server is handed down to user terminal with SDP file and compound media objects of described trigger composition of live electronic programming stream or program request file correspondence;
C25, user terminal are initiated licence according to the information that comprises in the trigger to the copyright center and are obtained request;
C26, copyright center to subscription authentication after, return licence to user terminal.
According to said method of the present invention, Electronic Program Guide/OSS or streaming media server generate in the license message to the copyright center requests, carry the ECID of program request or programme televised live at least.
Described request generates in the message of licence and also carries the authority information that the control program is watched, comprising: Licensing Model information, broadcasting time information, the term of validity begin/and the combination of one of Close Date information and accumulation duration information or described information.
According to said method of the present invention, comprise encryption equipment in the licence that the copyright center generates to the program request of copyright center registration or the content key of programme televised live correspondence, and request generates the authority information that the control program that reports in the license message is watched.
Use HTTP or SOAP carrying transmission data between described Electronic Program Guide/OSS and the copyright center.
According to said method of the present invention, if having heartbeat message between Electronic Program Guide/OSS and the user terminal, then described trigger can carry by heartbeat message, is handed down to user terminal by Electronic Program Guide/OSS.
According to said method of the present invention, described program source and encryption equipment are for system equipment independently or be an integrated equipment that is integrated with coding and encryption function.
Beneficial effect of the present invention is as follows:
(1), the invention provides concrete content-encrypt flow process and licence and obtain flow process in interactive Web TV system, realizing digital copyright management; For interactive Web TV system realizes that but digital copyright management provides concrete embodiment.
(2) the present invention has defined interface type between each system equipment and detailed interface message, can realize program source, Content Management System, Electronic Program Guide (EPG)/OSS in the IPTV system, with copyright center, the encryption equipment of realizing DRM, and the intercommunication between the user terminal.
(3) interface message of the present invention definition has reduced the degree of coupling between each system equipment based on open architecture, makes server that different manufacturers provides and terminal behind the interface that satisfies the present invention's definition, can be integrated in the same IPTV-DRM system.
Description of drawings
Fig. 1 is the structure chart of IPTV-digital publishing rights operation system;
Fig. 2 is a content-encrypt flow chart of the present invention;
Fig. 3 obtains one of flow chart for licence of the present invention;
Fig. 4 obtains two of flow chart for licence of the present invention.
Embodiment
The inventive method adopts IPTV DRM operation system as shown in Figure 1.Comprise: program source, Content Management System, encryption equipment, copyright center, Electronic Program Guide/OSS, streaming media server, Media Delivery Network network and user terminal, the function that each entity is finished is a prior art, is not described further at this.
The basic realization principle of the inventive method is, at first original digital content (program source provides) being encrypted packing by encryption equipment handles, have oneself independently ECID (Encrypted Content ID encrypts the unique identification of back content) and CEK (Content Encrypt Key encrypted content key) through the digital content of encrypting packing, the user is after obtaining through the electronic programming content of encrypting, can't directly use, must apply for and buy the content occupancy permit, after adopting the decruption key that comprises in the licence that electronic programming stream is deciphered, just can watch related-program.
Below the programme content encryption flow in the inventive method and user license being obtained flow process is described in detail respectively.
Referring to Fig. 2, be content-encrypt flow process of the present invention, concrete steps:
Step 1, Content Management System are initiated the program encryption request to encryption equipment, the information such as deposit position of file after notice encryption equipment program category (program request/live) to be encrypted, document location to be encrypted, the encryption, and this information sends by interface DRM6.If the program category of encrypting is program request, then in the data that send, comprise program request file path to be encrypted and filename at least and encrypt after the path and the filename of program request file, need specify encryption equipment for the situation of many encryption equipments, also can comprise encryption equipment and number and login the account information of this encryption equipment, and information such as program request file name, key number and copyright center numbering; If the program category of encrypting is live, then in the data that send, comprise SDP to be encrypted (Session Description Protocol) file path and filename at least and encrypt after the path and the filename of SDP file, also can comprise the numbering and the login account of specifying encryption equipment, relevant channel information, as the channel action type, comprise the increase channel, revise channel or deletion channel, channel number to be encrypted, also can comprise relevant key information, as the key number, whether change key identification, the new key entry-into-force time, the positional information that also can comprise programme televised live stream before encrypting, as the IP address of programme televised live stream encoder and video thereof and audio port number, encrypt the positional information of back programme televised live stream, as the IP address of streaming media server and video thereof and audio port number, also can comprise copyright center numbering.
The message field that following table one is comprised for the program request encryption request message:
| Parameter name | Type | Describe |
| Request message, Content Management System is to encryption equipment | ||
| MsgType | String | Type of message: VODEncrypt |
| UserName | String | Login encryption equipment user name |
| Password | String | Login encryption equipment password |
| EncryptorID | String | The encryption equipment numbering need be specified encryption equipment for the situation of many encryption equipments |
| ContentID | String | Reference number of a document to be encrypted |
| VODFILE | String | File path to be encrypted, filename |
| VODENCFILE | String | Encrypt back file path, filename |
| VODNAME | String | The request program title |
| CEKCOUNT | Int | Key number (1～10) |
| RIID | String | Copyright center numbering (default value: 1000) |
| Response message, encryption equipment is to Content Management System | ||
| Status | String | Answer code: Success: success; Failed: failure |
| ContentID | String | Reference number of a document to be encrypted, former state is returned |
| ECID | String | The encrypt file sign that encryption equipment distributes |
| Description | Binary | Concrete response descriptor |
Following table two is the message field that live encryption request message comprised:
| Parameter name | Type | Describe |
| Request message, Content Management System is to encryption equipment | ||
| MsgType | String | Type of message: BTVEncrypt |
| UserName | String | Login encryption equipment user name |
| Password | String | Login encryption equipment password |
| OprType | String | Action type, 1: increase channel; 2: revise channel; 3: the deletion channel |
| Encryptor ID | String | The encryption equipment numbering need be specified encryption equipment for the situation of many encryption equipments |
| Content ID | String | Channel number to be encrypted |
| SDPFILE | String | SDP file to be encrypted path, filename |
| ENCSDPFILE | String | Encrypt SDP file path, back, filename |
| IP | String | Program source (being encoder) IP address |
| VideoPort | String | Program source (being encoder) video end slogan |
| AudioPort | String | Program source (being encoder) audio port number |
| ENCIP | String | Streaming media server (or multicast server) IP address |
| ENCVideoPort | String | Streaming media server (or multicast server) video end slogan |
| ENCAudioPort | String | Streaming media server (or multicast server) audio port number |
| CEKCOUNT | Int | Key number (1～10) |
| CEKChange | Boolean | Security key change whether |
| CEKChangeTime | String | The new key entry-into-force time, YYYYMMDDHHMMSS |
| RIID | String | Copyright center numbering (default value: 1000) |
| Response message, Content Management System is to encryption equipment | ||
| Status | String | Answer code: Success: success; Failed: failure |
| Content ID | String | Channel number to be encrypted, former state is returned |
| ECID | String | The encoded channel sign that encryption equipment distributes |
| Description | Binary | Concrete response descriptor |
Step 2, encryption equipment obtain program request file to be encrypted or live SDP file according to the Content Management System appointed positions from program source.
Step 3, encryption equipment are handled file to be encrypted; Comprise: the program request file is carried out encryption or live SDP file is handled, and received live TV stream to be encrypted according to ISMA (Internet Streaming Media Alliance, internet stream media alliance) standard.
Step 4, encryption equipment upload the program request file after the encryption or handle after live SDP file to the Content Management System appointed positions.
Among the above-mentioned steps 2-4, under the different mode of encryption equipment and program source, and when handling different program categories, the download of file, encrypt and to upload mode different.Be server mode independently at encryption equipment and program source, when program category when being live, encryption equipment is downloaded SDP file and is handled from program source, this moment, the download of SDP file was carried by interface DRM8 and by file transfer protocol (FTP) (FTP), encryption equipment obtains programme televised live stream and encryption from program source, directly be forwarded to then in the Media Delivery Network network, this moment, the forwarding of live TV stream was carried by real-time transport protocol (rtp) and datagram (UDP) agreement jointly by interface DRM3.When program category was request program, encryption equipment was downloaded request program from program source and is encrypted, and the download of program request this moment file, is forwarded on the streaming media server of appointment after encryption is finished by interface DRM8 and by the File Transfer Protocol carrying.If encryption equipment is integrated in the program source encoder, when program category when being live, the SDP file that encoder generates is exactly the SDP file after handling, and the program stream of encoder output is exactly the program stream after encrypting; When program category is a sowing time, earlier code stream to be encrypted before the encoder generation program request file, the program request file of generation is exactly the program request file after encrypting.
Step 5, encryption equipment are registered to the copyright center requests, in login request message, comprise the encryption key of current program and the ECID that encryption equipment is distributed to ciphered program at least, also can comprise the recording operation type, existed record or modification to have record as newly-increased record, deletion, and information such as cryptographic algorithm title and timestamp.This message transmits by interface DRM4 and by HTTP(Hypertext Transport Protocol) or the carrying of Simple Object Access Protocol agreements such as (SOAP), socket layer safe in utilization agreements such as (SSL) is encrypted.
The DRM4 interface message is shown in following table three:
| Parameter name | Type | Describe |
| Request message, encryption equipment is to the copyright center | ||
| MsgType | String | Span: ADD: newly-increased record DELETE: deletion, there has been record UPDATE in deletion according to ECID: revise, revise already present record according to ECID |
| ECID | String | The unique identification of program request or programme televised live |
| Algorithm | String | The cryptographic algorithm title |
| CEK | String | Content key adopts the Base64 coding |
| TimeStamp | String | Timestamp, form: YYYYMMDDHHMMSS |
| Response message, the copyright center is to encryption equipment | ||
| Status | String | Answer code: Success: successful NotExist: the record that delete or revise does not exist Duplicate:ECID to repeat, and can not increase NotInterity newly: data are imperfect |
| Description | Binary | Concrete response descriptor |
Step 6, encryption equipment return to Content Management System and encrypt request responding message, and this response message comprises answer code and the ECID that identifies successfully or fail at least, also can comprise the numbering of file to be encrypted or channel to be encrypted and concrete response message description etc.This message transmits by interface DRM6 and by the carrying of agreements such as HTTP or SOAP, uses agreement encryptions such as SSL.
Step 7, Content Management System are to EPG/ OSS issue programme information, and this information is expanded on the basis of existing interface information, comprises the encryption identification whether sign encrypts at least.When being designated when encrypting, also must comprise ECID and copyright center number information.Programme information is by interface DRM7 issue.
DRM7 interface extend information is shown in following table four:
| Parameter name | Describe | Type | Optional | Explanation |
| EnFlag | Encryption identification | String (1) | Not | Whether program encryption indicator: 0: unencryption; 1: encrypt |
| ECID | The ciphered program unique identification | String (32) | Be | Numbering corresponding to numbering of encrypting the back request program or encryption direct broadcast band.EnFlag equal 1 o'clock essential, otherwise optional.ECID is the ECID that encryption equipment returns among the DRM6 |
| RIID | Copyright center numbering | String (4) | Be | The numbering at the copyright center of request program or direct broadcast band ownership.EnFlag equal 1 o'clock essential, otherwise optional. |
Referring to Fig. 3, for licence of the present invention obtains flow process, concrete steps:
The IPTV program is watched in step 1, user request, at first by user terminal to EPG/ OSS request electronic program list.
Step 2, EPG/ OSS return programme to user terminal, and request program numbering or programme televised live channel number in the programme are corresponding with the ECID of program.
Step 3, user check, search for programme, finally select programs of interest to click and watch; User terminal is judged the local valid license that whether has this program, enters step 10 if there is licence in this locality, obtains ciphered program stream and watches; Otherwise, carry out the following step.
Step 4, if there is not valid license in this locality, then initiate authorization requests to the EPG/ OSS, comprise the ECID information of the program that the user selectes in this request.
Step 5, EPG/ OSS are judged whether arrearage of user, whether are had the right to watch this program.If can watch this program, then the EPG/ OSS is uploaded information such as authority information that the user orders and ECID to the copyright center, request copyright center generates licence for the user, this solicited message comprises the ECID information of the selected program of user at least, also can comprise licence numbering, Licensing Model, as demonstration, broadcast, execution or derivation etc., limit information such as number of times that the user watches, licence effective time, timestamp, wherein if the newly-generated licence of request, then licence is numbered zero, otherwise is former licence numbering.This request message transmits by interface DRM5, and by the carrying of agreements such as HTTP or SOAP, uses agreement encryptions such as SSL.
Step 6, copyright center generate the licence that the user selectes program according to ECID that receives and key information, return response message, and successfully then also will send the trigger that comprises copyright centre address, port numbers and licence numbering at least if respond.This response message transmits by interface DRM5, and by the carrying of agreements such as HTTP or SOAP, uses agreement encryptions such as SSL.
The DRM5 interface message is defined as follows shown in the table five:
| Parameter name | Type | Describe |
| Request message, EPG/ operation support subsystem is to the copyright center | ||
| UserName | String | IPTV service-user name |
| ECID | String | The unique identification of program request or programme televised live |
| ROID | String | Licence numbering: if newly-generated licence, ROID=" 0 " then then fills the licence numbering if licence obtains (comprise obtain failure obtain again with the stateless licence obtain again) again |
| Permission | String | Licensing Model, span: DISPLAY: show PLAY: play, be suitable for EXECUTE for the IPTV program: carry out, be suitable for EXPORT for executable files such as recreation: derive, value is MOVE, COPY, whether the expression right objects can shift out and duplicate |
| COUNT | Int | Number of times |
| StartDatetime | String | Term of validity Start Date, form: YYYYMMDDHHMMSS |
| EndDatetime | String | The term of validity Close Date, form: YYYYMMDDHHMMSS |
| Interval | Int | The relative term of validity, unit: second |
| Accumulated | Int | The accumulation duration, unit: second |
| TimeStamp | String | Timestamp, form: YYYYMMDDHHMMSS |
| Response message, the copyright center is to EPG/ operation support subsystem | ||
| Status | String | Answer code: Success: success; Failed: failure |
| Trigger | Binary | If the success would return Trigger |
| Description | Binary | If the failure would return concrete error description information |
Step 7, EPG/ OSS return authorization success response message, and in response message, carry trigger.Trigger is attached in the prior art interface message, is packaged into a message with it.
Its message format is exemplified below:
Content-Type：multipart/mixed；boundary＝″huaweidrm000fbcf035ff06e5RI″
--huaweidrm000fbcf035ff06e5RI
Content-Type：text/html
Content-Transfer-Encoding：binary
<HTML>
--huaweidrm000fbcf035ff06e5RI
Content-Type：application/vnd.oma.drm.roap-trigger+xml
Content-Transfer-Encoding：binary
<Trigger1>
--huaweidrm000fbcf035ff06e5RI
Content-Type：application/vnd.oma.drm.roap-trigger+xml
Content-Transfer-Encoding：binary
<Trigger2>
--huaweidrm000fbcf035ff06e5RI
Content-Type：application/vnd.oma.drm.roap-trigger+xml
Content-Transfer-Encoding：binary
<Trigger3>
…
--huaweidrm000fbcf035ff06e5RI--
If have heartbeat message between the server of user terminal and EPG/ OSS, then trigger can also carry by heartbeat message, is issued to user terminal as the part as heartbeat message.
Comprise trigger in the response message that step 8, user terminal judgement are received, initiate licence according to the information of trigger indication to the copyright center and obtain request.
Step 9, copyright center judge that this user terminal is that legal terminal is then returned licence, return the errored response sign indicating number if judge the non-rule of this user terminal, and user terminal can be initiated register requirement according to this error code and be registered.
After step 10, user terminal are received licence, ECID according to selected program obtains electronic programming stream by the Media Delivery Network network, utilize licence deciphering program stream to watch then, and watch number of times, the term of validity, duration etc. according to the authority information control program of stipulating in the licence.
Programme televised live flows and the SDP file of program request file correspondence because user terminal before obtaining programme televised live stream and program request file, must obtain, so trigger can be formed a compound media objects with SDP file and together is issued to user terminal.Detailed process is as shown in Figure 4:
Step 1-4, with the step 1-4 of Fig. 3 flow process, the program that the user obtains programme and therefrom selects to watch from the EPG/ OSS, and to EPG/ OSS request mandate.
After step 5, OSS are received user-authorization-request, the return authorization result.
Step 6, user terminal be according to the SDP file of Authorization result to live electronic programming stream of streaming media server acquisition request or program request file correspondence, and report this locality whether the licence sign is arranged in request message.
If show in step 7 request message that this locality does not have licence, streaming media server request copyright center generates licence.
The corresponding programme information that order from Electronic Program Guide/OSS inquiring user at step 8, copyright center, the corresponding programme information of ordering according to the user generates licence, and returns trigger to streaming media server.
Step 9, streaming media server are handed down to user terminal with SDP file and compound media objects of described trigger composition of live electronic programming stream or program request file correspondence.This compound media objects can be used the original HTTP of SDP file, transmit stream media protocol agreements such as (RTSP) carrying in real time.
The compound media objects message format is exemplified below:
Content-Type：multipart/mixed；boundary＝″huaweidrm000fbcf035ff06e5RI″
--huaweidrm000fbcf035ff06e5RI
Content-Type：application/sdp
Content-Transfer-Encoding：binary
The SDP content
--huaweidrm000fbcf035ff06e5RI
Content-Type：application/vnd.oma.drm.roap-trigger+xml
Content-Transfer-Encoding：binary
<Trigger>
--huaweidrm000fbcf035ff06e5RI-
Step 10, user terminal are initiated licence according to the information of the indication of the trigger in the compound media objects of receiving to the copyright center and are obtained request.
Step 11, copyright center judge that this user terminal is that legal terminal is then returned licence, return the errored response sign indicating number if judge the non-rule of this user terminal, and user terminal can be initiated register requirement according to this error code and be registered.
After step 12, user terminal are received licence, utilize licence deciphering to watch, and watch number of times, the term of validity, duration etc. according to the authority information control program of stipulating in the licence from the program stream that streaming media server obtains.
Describe as can be known by above flow process, in the IPTV-DRM system, it is relatively independent that programme content encryption flow and licence obtain flow process, in the programme content encryption flow, encryption equipment is registered the ECID and the encryption key of encrypt file to the copyright center, and the ECID of encrypt file is published to EPG/ operation support management system by Content Management System; Obtain in the flow process at licence, the user is in request program, obtain the ECID of selected program from EPG/ operation support management system, and when sending license request, carry the ECID of selected program, make the copyright center can generate the licence of user-selected program according to this information combining encryption key, the user watches according to licence deciphering program file and according to the restriction of licence.This shows, part such as the program source in the IPTV system, Content Management System, EPG/ OSS and parts such as the encryption equipment of realizing the digital copyright management business, copyright center, transmission by ECID information links together, and has realized carrying out digital copyright management in existing IPTV system.
In addition, the present invention goes back docking port information and defines.Interface DRM4 goes up encryption equipment and comprise ECID and content key at least in the login request message that the copyright center sends, and this is the necessary information that generates licence; Interface DRM5 goes up the EPG/ OSS and comprise ECID at least in the license request message that the copyright center sends, and in order to indication copyright center the program that the user selectes is generated licence; Interface DRM6 goes up encryption equipment and comprise ECID at least in the encryption request response that Content Management System sends, interface DRM7 goes up Content Management System and comprise ECID at least in the message that the EPG/ OSS sends, this makes ECID be published to the EPG/ OSS after content-encrypt is handled, make that each ciphered program all comprises corresponding ECID in the rendition list of EPG/ OSS, the user has obtained the ECID of selected program when the EPG/ OSS is selected program, and obtain licence according to this ECID, program downloading is watched.This shows,,, just can realize the digital publishing rights business function in the IPTV system as long as meet the interface of the present invention's definition although the server of each several part (system equipment) may be not quite identical because manufacturer is different in the system.Therefore, the present invention has reduced between each system equipment and the degree of coupling between system equipment and the terminal, makes different system equipments and terminal after satisfying defined interface message, can be integrated into same IPTV DRM system, realizes intercommunication.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (18)
1, a kind of interactive Web TV system is realized the method for digital copyright management, and described interactive Web TV system comprises: program source, Content Management System, encryption equipment, Electronic Program Guide/OSS, copyright center, Media Delivery Network network and user terminal; It is characterized in that this method comprises:
A, Content Management System control encryption equipment are encrypted the programme content of program source, and programme are published to described Electronic Program Guide/OSS;
B, user terminal obtain programme from described Electronic Program Guide/OSS and select the program watched for the user, when the user carries out judging the local valid license that whether stores corresponding program after program selects, if having, and execution in step D then; Otherwise, execution in step C;
C, user terminal obtain licence from the copyright center, and are kept at this locality, continue step D;
D, user terminal use the content key that comprises in the described licence that the described electronic programming stream that obtains by the Media Delivery Network network is deciphered, and restore programme content.
2, the method for claim 1 is characterized in that, described steps A comprises:
A1, Content Management System are initiated the request of encrypting to encryption equipment;
A2, encryption equipment obtain electronic programming from program source and carry out encryption according to the indication information in the described encryption request;
Encryption equipment is registered to described copyright center with encrypted content key, and returns ciphered program unique identification ECID to Content Management System;
The programme that A3, Content Management System will comprise ECID is published to described Electronic Program Guide/OSS.
3, method as claimed in claim 2, it is characterized in that, the encryption request that Content Management System described in the steps A 1 is initiated to encryption equipment comprises at least: file path and the filename of file to be encrypted in program source, and file path and the filename of encrypting the back file storage.
4, method as claimed in claim 2 is characterized in that, uses HTML (Hypertext Markup Language) HTTP or Simple Object Access Protocol SOAP carrying transmission data between described Content Management System and the encryption equipment.
5, as claim 3 or 4 described methods, it is characterized in that encryption equipment carries out encryption to electronic programming described in the steps A 2, comprising:
Encryption equipment is encrypted the program request file of specified file path and filename; Perhaps live session is described the agreement SDP file and handle, and receive live TV stream to be encrypted and encrypt;
Live SDP file after program request file after encryption equipment will be encrypted or the processing is saved in the streaming media server that is connected with the Media Delivery Network network; And the live TV stream after will encrypting directly sends to the Media Delivery Network network.
6, method as claimed in claim 5 is characterized in that, the interface between described encryption equipment and streaming media server or the Media Delivery Network network uses realtime transmission protocol RTP or transport stream TS carrying transmission data.
7, method as claimed in claim 2 is characterized in that, in the described steps A 2, encryption equipment also sends the ECID and the cryptographic algorithm title of program request or programme televised live to the copyright center; The mind-set encryption equipment returns responsive state message in the copyright.
8, method as claimed in claim 7 is characterized in that, uses HTTP or SOAP carrying transmission data between described encryption equipment and the copyright center.
9, method as claimed in claim 2 is characterized in that, comprises described in the steps A 3 in the programme of ECID, and ECID is corresponding to the numbering of the request program after encrypting or the numbering of direct broadcast band.
10, method as claimed in claim 9 is characterized in that, Content Management System also comprises to the interface message that Electronic Program Guide/OSS sends: the number information at copyright center under encryption identification whether the expression program is encrypted and the program.
11, the method for claim 1 is characterized in that, described step C comprises:
C11, user terminal are initiated authorization requests to Electronic Program Guide/OSS;
C12, Electronic Program Guide/OSS generate licence to the copyright center requests;
C13, copyright center generate licence, and return the trigger that comprises copyright centre address, port numbers and licence number information to Electronic Program Guide/OSS;
C14, Electronic Program Guide/OSS be to user terminal return authorization success response message, and carry described trigger;
C15, user terminal are initiated licence according to the information that comprises in the trigger to the copyright center and are obtained request;
C16, copyright center to subscription authentication after, return licence to user terminal.
12, the method for claim 1 is characterized in that, described step C comprises:
C21, user terminal are initiated authorization requests to Electronic Program Guide/OSS;
C22, Electronic Program Guide/OSS return authorization result;
C23, user terminal be according to the SDP file of Authorization result to live electronic programming stream of streaming media server acquisition request or program request file correspondence, and report this locality whether the licence sign is arranged in request message;
C24, if show that this locality does not have licence in the request message, streaming media server request copyright center generates licence;
The corresponding programme information that order from Electronic Program Guide/OSS inquiring user at the copyright center generates licence, and returns the trigger that comprises copyright centre address, port numbers and licence number information to streaming media server;
Streaming media server is handed down to user terminal with SDP file and compound media objects of described trigger composition of live electronic programming stream or program request file correspondence;
C25, user terminal are initiated licence according to the information that comprises in the trigger to the copyright center and are obtained request;
C26, copyright center to subscription authentication after, return licence to user terminal.
As claim 11 or 12 described methods, it is characterized in that 13, Electronic Program Guide/OSS or streaming media server generate in the license message to the copyright center requests, carry the ECID of program request or programme televised live at least.
14, method as claimed in claim 13, it is characterized in that, described request generates in the message of licence and also carries the authority information that the control program is watched, comprising: Licensing Model information, broadcasting time information, the term of validity begin/and the combination of one of Close Date information and accumulation duration information or described information.
15, method as claimed in claim 14, it is characterized in that, comprise encryption equipment in the licence that the copyright center generates to the program request of copyright center registration or the content key of programme televised live correspondence, and request generates the authority information that the control program that reports in the license message is watched.
16, method as claimed in claim 13 is characterized in that, uses HTTP or SOAP carrying transmission data between described Electronic Program Guide/OSS and the copyright center.
17, method as claimed in claim 11, it is characterized in that, if have heartbeat message between Electronic Program Guide/OSS and the user terminal, then described trigger can carry by heartbeat message, is handed down to user terminal by Electronic Program Guide/OSS.
18, the method for claim 1 is characterized in that, described program source and encryption equipment are for system equipment independently or be an integrated equipment that is integrated with coding and encryption function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510114379XA CN100571372C (en) | 2005-10-24 | 2005-10-24 | A kind of interactive Web TV system is realized the method for digital copyright management |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB200510114379XA CN100571372C (en) | 2005-10-24 | 2005-10-24 | A kind of interactive Web TV system is realized the method for digital copyright management |
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| CN1852420A true CN1852420A (en) | 2006-10-25 |
| CN100571372C CN100571372C (en) | 2009-12-16 |
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| CNB200510114379XA Active CN100571372C (en) | 2005-10-24 | 2005-10-24 | A kind of interactive Web TV system is realized the method for digital copyright management |
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| CN101282473B (en) * | 2008-05-05 | 2010-10-13 | 国家广播电影电视总局广播科学研究院 | Method for managing digital television copyright |
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