CN101662496A - System and method using point-to-point technology to realize file sharing - Google Patents
System and method using point-to-point technology to realize file sharing Download PDFInfo
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- CN101662496A CN101662496A CN200910093431A CN200910093431A CN101662496A CN 101662496 A CN101662496 A CN 101662496A CN 200910093431 A CN200910093431 A CN 200910093431A CN 200910093431 A CN200910093431 A CN 200910093431A CN 101662496 A CN101662496 A CN 101662496A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/104—Peer-to-peer [P2P] networks
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/10—File systems; File servers
- G06F16/18—File system types
- G06F16/182—Distributed file systems
- G06F16/1834—Distributed file systems implemented based on peer-to-peer networks, e.g. gnutella
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/104—Peer-to-peer [P2P] networks
- H04L67/1087—Peer-to-peer [P2P] networks using cross-functional networking aspects
- H04L67/1091—Interfacing with client-server systems or between P2P systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/08—Network architectures or network communication protocols for network security for authentication of entities
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/06—Protocols specially adapted for file transfer, e.g. file transfer protocol [FTP]
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Abstract
The invention discloses a system using point-to-point technology to realize file sharing. The system comprises a web server, a point-to-point server and more than one user side, wherein the user sideis used for requesting the information of the point-to-point server pre-stored in the web server and requesting the point-to-point server to release shared files or download files; the web server is used for providing the information of the point-to-point server for the user side and authenticating the authentication information sent by the point-to-point server; and the point-to-point server is used for authenticating the information sent by the user side and allowing the user side to release the shared files or download files after the authentication is passed. The invention also discloses amethod using point-to-point technology to realize file sharing simultaneously, and the adoption of the system and the method can realize safe and quick file sharing and download among members of multimedia meeting members and reduce the pressure of servers.
Description
Technical Field
The present invention relates to file sharing technology in communication networks, and more particularly, to a system and method for implementing file sharing using peer-to-peer (P2P) technology.
Background
With the development of Java and other World Wide WEB (WEB) application technologies, more and more services are developed based on WEB technologies, and the related range is wider and wider, wherein there is a multimedia conference system.
In a multimedia conference system, people often need to share some files, in the existing sharing mode, a publisher generally uploads the files to be shared to a server directly, then a link for downloading the shared files is notified to other conference members, the other conference members directly click the link on a WEB page for downloading, and the downloading is directly downloaded from the server.
Although the current method for downloading the shared file is simple to implement, there are many defects:
firstly, a centralized distribution mode is adopted, so that the bandwidth of the server can be greatly occupied, and the pressure of the server is greatly increased;
secondly, the server bears a great deal of conference service functions, the response speed of the shared file is necessarily slow, and the file downloading speed of other conference members is slow under most conditions;
when the server is busy, other conference members cannot download files instantly, and the effect of the multimedia conference is directly influenced;
and fourthly, when a large amount of files are shared in the multimedia conference, the server may occupy the whole bandwidth of the server, so that the server cannot perform normal conference service, and the whole multimedia conference system cannot provide multimedia conference service for users.
Disclosure of Invention
In view of the above, the main objective of the present invention is to provide a system and a method for implementing file sharing by using P2P technology, which can implement safe and fast file sharing and downloading among conference members of a multimedia conference, thereby reducing the pressure of a server.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the invention provides a system for realizing file sharing by utilizing a point-to-point P2P technology, which comprises a WEB server WEB Svr, a point-to-point server P2P Svr and more than one user side;
the user side is used for requesting the pre-stored P2P Svr information from the WEB Svr and requesting the P2P Svr to release the shared file or download the file;
the WEB Svr is used for providing the P2P Svr information to the user side and verifying the verification information sent by the P2P Svr;
and the P2P Svr is used for verifying the information sent by the user side, and after the verification is passed, the user side is allowed to issue the shared file or download the file.
In the above scheme, the user side further includes a WEB conference control module and a P2P client side; the WEB conference control module is used for requesting information of P2P Svr to the WEB Svr; the P2P client is used for sending a request for issuing a shared file or a request for downloading a file to the P2P Svr, and issuing the shared file or downloading the file after the request passes verification; and the system is also used for sending the received P2P Svr information to the WEB conference control module for display.
In the above scheme, the information of the P2P Svr sent by the WEB Svr to the user side is accompanied by a temporary password; the P2P client requests the P2P Svr to share or download files with temporary passwords.
In the above scheme, when the P2P client requests the P2P Svr to perform file sharing or file downloading, the client also carries verification information and a KEY for sharing files; the verification information comprises conference information of the current multimedia conference and identity information of the user side.
In the above scheme, the WEB Svr and the P2P Svr are implemented independently, or implemented by the same server.
The invention also provides a method for realizing file sharing by utilizing the P2P technology, which comprises the following steps:
when a first user wants to release a shared file, the first user requests P2P Svr information prestored in the first user from the WEB Svr, WEBSvr verifies the verification information of the first user, after the verification is passed, the first user requests to release the shared file from the P2PSvr according to the P2P Svr information, and sends related information for verification; after the verification is passed, the first user informs the second user of the KEY of the shared file and issues the shared file;
when a second user wants to download a file, the second user requests P2P Svr information prestored in the second user from the WEB Svr, the WEB Svr verifies the verification information of the second user, after the verification is passed, the second user requests the P2P Svr to download the file according to the P2P Svr information, sends related information to verify, and starts to download the file after the verification is passed.
In the above scheme, the P2P Svr information returned by the WEB Svr to the first user or the second user is accompanied by a temporary password.
In the above scheme, when the first user wants to issue the shared file, the P2P Svr verifies the relevant information as: the P2P Svr verifies the temporary password of the first user, after the verification is passed, the P2P Svr verifies the verification information sent by the first user through the WEB Svr, after the verification is passed, the first user is allowed to issue the shared file, and the conference identifier of the multimedia conference participated by the first user, the shared file issuer and the KEY of the shared file are recorded;
when the second user wants to download the file, the P2P Svr verifies the relevant information as: the P2P Svr verifies the temporary password of the second user, after the verification is passed, the P2P Svr verifies the verification information sent by the second user through the WEB Svr, after the verification is passed, the KEY of the shared file is continuously verified, and after the verification is passed, the message allowing downloading is returned.
In the above scheme, the second user starts downloading the file is: the file download is made from any one or more users who have downloaded, or are downloading.
Therefore, compared with the prior art, the system and the method for realizing file sharing by using the P2P technology provided by the invention have the following remarkable effects:
firstly, due to the adoption of a P2P file sharing mode, files are directly transmitted among conference members participating in a multimedia conference, the bandwidth of a server is not occupied, the pressure of the server is greatly reduced, and even if the files are large, the sharing effect is not influenced;
secondly, multipoint downloading can be realized by adopting a P2P file sharing mode, so that one conference member can share or download a required file from other conference members, and thus, the file sharing speed is greatly improved;
thirdly, a P2P file sharing mode is adopted, a WEB server in the multimedia conference system only needs to carry out simple verification, and file sharing and downloading operations are carried out among conference members participating in the multimedia conference, so that the use of the conference members is not influenced even if the server is busy; moreover, shared and downloaded files need to pass the verification of the server, so that the safety of the files is guaranteed.
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FIG. 1 is a schematic diagram of an implementation system for implementing file sharing by using P2P technology according to the present invention;
fig. 2 is a schematic flow chart of an implementation method for implementing file sharing by using the P2P technology according to the present invention.
Detailed Description
The basic idea of the invention is: in the multimedia conference, by using the P2P technology, conference members needing to share files or download files are firstly verified by the server, and after the verification is passed, the files can be directly shared or downloaded among the conference members.
Here, the server includes a WEB server, a P2P server; the conference members are users participating in the multimedia conference.
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, the system for implementing file sharing by using P2P technology in the present invention is composed of a WEB Server (Svr, Server)13, a P2P Svr14, and more than one user end; further, the user side is composed of a WEB conference control module 11 and a P2P client 12; here, the P2P Svr14 and the WEBSvr 13 may be implemented independently or by the same server. Wherein,
and the user side is used for requesting the pre-stored P2P Svr14 information from the WEB Svr 13 and requesting the P2P Svr14 to issue a shared file or download the file.
And the WEB Svr 13 receives the request of the user side for requesting the P2P Svr information, returns the P2P Svr information to the user side and provides verification for the verification information of the user sent by the P2P Svr 14.
P2P Svr14, receiving the request of the user end to issue the shared file, and verifying the related information sent by the user end; receiving a request of downloading a file from a user side, and verifying related information sent by the user side; here, the related information sent by the user side includes the temporary password, the KEY of the shared file, and the authentication information, where the authentication information is authenticated through the Svr WEB.
The WEB conference control module 11 is configured to request information of the P2P Svr14 from the WEB Svr 13;
the P2P client 12 is used for sending a request for issuing a shared file or downloading a file to the P2P Svr14, and issuing the shared file or downloading the file after the request passes verification; and is also used for displaying the received P2P Svr14 information to the conference members through the WEB conference control module 11.
The functions of each part are described below by specific embodiments, in this embodiment, two clients, client a and client B, are taken as an example, where client a is to issue a shared file, and client B is to download a file.
Referring to the structure shown in fig. 1, in the multimedia conference process, when the user terminal a wants to release the shared file, the WEB conference control module 11 of the user terminal a requests the information of P2P Svr14 pre-stored in the request from the WEB Svr 13, where the request carries verification information, and the verification information includes conference information, identity information of the user terminal a, and the like. After the WEB Svr 13 verifies the verification information of the user side a, returning P2P Svr14 information carrying the temporary password to the WEB conference control module 11 of the user side a; the WEB conference control module 11 transmits the received P2P Svr information to the P2P client 12 of the user terminal a, the P2P client 12 requests the P2P Svr14 to issue a shared file according to the received P2PSvr information, and carries its own authentication information, temporary password and KEY (KEY) of the shared file, the P2P Svr14 verifies whether the temporary password is correct, and when the password is incorrect, returns information of failed authentication to the P2P client 12; when the password is correct, P2P Svr14 verifies whether the verification information of the user side a is correct through the WEB Svr 13. If the WEB Svr 13 returns that the verification is not passed, the P2P Svr14 rejects the request of the user terminal a to issue the shared file, and the process ends. On the contrary, if the verification is passed, the P2P Svr14 agrees to the request of the user terminal a to publish the shared file, and records the publisher of the shared file, the KEY of the shared file, and the conference identifier of the multimedia conference in which the user terminal a participates, and the P2P client terminal 12 of the user terminal a publishes the shared file. After receiving the result of successful request for issuing the shared file, the WEB conference control module 11 of the user terminal a notifies the other user terminals of the KEY of the shared file to be issued by the user terminal a.
In the process of the multimedia conference, when the user terminal B wants to download the file, the WEB conference control module 11 of the user terminal B requests the information of P2P Svr14 pre-stored in the WEB Svr 13, and the request carries the verification information of the user terminal B. After verifying the verification information of the user side B, the WEB Svr 13 returns P2P Svr information carrying the temporary password to the WEB conference control module 11 of the user side B. The WEB conference control module 11 of the user B transmits the P2P Svr information to the P2P client 12 of the user B, and the P2P client 12 of the user B makes a download request to the P2P Svr14 according to the received P2P Svr information, where the download request carries the authentication information of the user B, the temporary password, and the KEY of the shared file. And P2P Svr14 verifies whether the temporary password is correct, if the password is incorrect, information of verification failure is returned, and the user side B is refused to download the file, if the password is correct, P2P Svr14 verifies the verification information of the user side B through WEB Svr 13, and if the verification is not passed, P2P Svr14 returns the information of verification failure to the P2P client 12 of the user side B, and the user side B is refused to download the file. On the contrary, if the authentication is passed, the P2P Svr14 authenticates the KEY of the shared file, if the KEY authentication of the shared file fails, the P2P Svr14 returns the information of refusing to download to the user terminal B, and if the KEY information authentication is passed, the user terminal B is allowed to download. The user terminal B starts downloading the shared file to the local, and the shared file can be downloaded from any one or more user terminals which have started downloading or finished downloading according to the downloading record of P2P Svr 14. After the multimedia conference is finished, the WEB Svr 13 informs the P2P Svr14 that a certain multimedia conference is finished, and the P2P Svr14 clears the shared file information of the multimedia conference.
In the invention, the temporary password can set a valid time limit as required, such as 5 seconds, if a conference member does not log in the P2P Svr within 5 seconds, the password is invalid, and the information of the P2P Svr must be acquired from the WEB Svr again. The generation of the temporary password may occur according to any known method for security reasons.
The KEY of the shared file can be obtained by the conference member through an encryption KEY, but is not limited to this way, as long as the purpose that the conference member needing downloading can pass the authentication only if the KEY is necessary is achieved.
Based on the system, when the first user requests to share the file, the first user sends a request for issuing the shared file to the server and sends the information of the first user to the server for verification, and after the verification is passed, the second user is informed; and when the second user requests to download the file, the second user sends a file downloading request to the server, sends the information of the second user to the server for verification, and after the verification is passed, the first user and the second user can share the file. Specifically, the method for implementing file sharing by using P2P technology of the present invention is shown in fig. 2, and includes the following steps:
P2P Svr verifies if the temporary password is correct, if not, go to step 203; if the temporary password is correct, verifying the verification information by the P2P Svr to the WEB Svr, and if the verification information is incorrect, executing the step 203; otherwise, step 204 is performed.
And step 203, the verification is failed, the user is refused to issue the request for sharing the file, and the current processing flow is finished.
when any second user needs to download the file, the information of the P2P Svr is requested from the WEB Svr, and the request carries the self verification information.
Here, there may be a plurality of second users as long as the second users are conference members participating in the current multimedia conference.
P2P Svr verifies the temporary password sent by the second user, if the temporary password is not correct, step 206 is executed; if the temporary password is correct, the P2P Svr verifies whether the verification information sent by the second user is correct through the Svr, and if the verification information is incorrect, step 206 is executed; if the verification information is correct, the P2P Svr verifies the KEY of the shared file sent by the second user, and if the KEY of the shared file is incorrect, step 206 is executed; otherwise, step 207 is performed.
And step 206, the verification is failed, the request of the user for downloading the file is refused, and the current processing flow is finished.
here, the file can be downloaded to any one or more users who have completed downloading or are downloading and have the required shared file, so as to achieve the purpose of quick downloading.
And step 208, after the multimedia conference is finished, the WEB Svr informs the P2P that the multimedia conference is finished, and the P2P Svr clears the shared file information of the multimedia conference.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, and any modifications, equivalents, improvements, etc. that are within the spirit and principle of the present invention should be included in the present invention.
Claims (9)
1. A system for realizing file sharing by utilizing a point-to-point P2P technology is characterized by comprising a WEB server WEB Svr, a point-to-point server P2P Svr and more than one user side;
the user side is used for requesting the pre-stored P2P Svr information from the WEB Svr and requesting the P2P Svr to release the shared file or download the file;
the WEB Svr is used for providing the P2P Svr information to the user side and verifying the verification information sent by the P2P Svr;
and the P2P Svr is used for verifying the information sent by the user side, and after the verification is passed, the user side is allowed to issue the shared file or download the file.
2. The system of claim 1, wherein the user terminal further comprises a WEB conference control module and a P2P client; wherein,
the WEB conference control module is used for requesting information of P2P Svr to the WEB Svr;
the P2P client is used for sending a request for issuing a shared file or a request for downloading a file to the P2P Svr, and issuing the shared file or downloading the file after the request passes verification; and the system is also used for sending the received P2PSvr information to a WEB conference control module for display.
3. The system according to claim 2, wherein the information sent by the Svr to the P2P Svr of the user terminal is accompanied by a temporary password;
the P2P client requests the P2P Svr to share or download files with temporary passwords.
4. The system according to claim 3, wherein the P2P client requests the P2P Svr to share or download files, and also carries authentication information, KEY for sharing files; the verification information comprises conference information of the current multimedia conference and identity information of the user side.
5. The system of claim 1, wherein the WEB Svr and the P2P Svr are implemented independently or by the same server.
6. A method for realizing file sharing by utilizing P2P technology is characterized in that the method comprises:
when a first user wants to release a shared file, the first user requests P2P Svr information prestored in the first user from the WEB Svr, WEBSvr verifies the verification information of the first user, after the verification is passed, the first user requests to release the shared file from the P2PSvr according to the P2P Svr information, and sends related information for verification; after the verification is passed, the first user informs the second user of the KEY of the shared file and issues the shared file;
when a second user wants to download a file, the second user requests P2P Svr information prestored in the second user from the WEB Svr, the WEB Svr verifies the verification information of the second user, after the verification is passed, the second user requests the P2P Svr to download the file according to the P2P Svr information, sends related information to verify, and starts to download the file after the verification is passed.
7. The method of claim 6, wherein the P2P Svr information returned by the Svr WEB to the first user or the second user is accompanied by a temporary password.
8. The method according to claim 7, wherein when the first user wants to publish the shared file, the P2P Svr verifies the related information as: the P2P Svr verifies the temporary password of the first user, after the verification is passed, the P2P Svr verifies the verification information sent by the first user through the WEB Svr, after the verification is passed, the first user is allowed to issue the shared file, and the conference identifier of the multimedia conference participated by the first user, the shared file issuer and the KEY of the shared file are recorded;
when the second user wants to download the file, the P2P Svr verifies the relevant information as: the P2P Svr verifies the temporary password of the second user, after the verification is passed, the P2P Svr verifies the verification information sent by the second user through the WEB Svr, after the verification is passed, the KEY of the shared file is continuously verified, and after the verification is passed, the message allowing downloading is returned.
9. The method of claim 6, wherein the second user initiating downloading the file is: the file download is made from any one or more users who have downloaded, or are downloading.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100934316A CN101662496B (en) | 2009-09-21 | 2009-09-21 | System and method using point-to-point technology to realize file sharing |
| PCT/CN2010/073026 WO2011032393A1 (en) | 2009-09-21 | 2010-05-20 | System and method for implementing file sharing by utilizing peer to peer technology |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100934316A CN101662496B (en) | 2009-09-21 | 2009-09-21 | System and method using point-to-point technology to realize file sharing |
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| CN101662496A true CN101662496A (en) | 2010-03-03 |
| CN101662496B CN101662496B (en) | 2013-04-03 |
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| CN2009100934316A Active CN101662496B (en) | 2009-09-21 | 2009-09-21 | System and method using point-to-point technology to realize file sharing |
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| WO (1) | WO2011032393A1 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2011032393A1 (en) * | 2009-09-21 | 2011-03-24 | 中兴通讯股份有限公司 | System and method for implementing file sharing by utilizing peer to peer technology |
| CN102378046A (en) * | 2010-08-13 | 2012-03-14 | 国基电子（上海）有限公司 | Server and method for realizing sharing of audio and video programs of set top box by using same |
| CN102487390A (en) * | 2010-12-01 | 2012-06-06 | 中国电信股份有限公司 | System and method for realizing high-capacity media stream live broadcast on basis of peer-to-peer (P2P) technology |
| CN102739701A (en) * | 2011-04-06 | 2012-10-17 | 中国电信股份有限公司 | Access control method of media streams and peer-to-peer streaming media system |
| CN102957729A (en) * | 2011-08-26 | 2013-03-06 | 中国移动通信集团公司 | Equipment and method for multimedia conference audio and video transmission |
| CN103559221A (en) * | 2013-10-18 | 2014-02-05 | 北京奇虎科技有限公司 | Multi-media data processing method and device and browser |
| CN103685455A (en) * | 2012-09-13 | 2014-03-26 | 株式会社理光 | Information processing device and conference system |
| CN111506551A (en) * | 2020-04-02 | 2020-08-07 | 深圳市创维群欣安防科技股份有限公司 | Conference file extraction method and system and computer equipment |
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| CN103561000B (en) * | 2013-10-18 | 2016-09-28 | 北京奇虎科技有限公司 | A kind of carry out the method for multimedia authentication, device and browser |
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| US7769881B2 (en) * | 2003-01-24 | 2010-08-03 | Hitachi, Ltd. | Method and apparatus for peer-to peer access |
| JP4490743B2 (en) * | 2004-06-24 | 2010-06-30 | 株式会社日立製作所 | File sharing system, file sharing management server and client device |
| US7165050B2 (en) * | 2004-09-20 | 2007-01-16 | Aaron Marking | Media on demand via peering |
| CN101132272B (en) * | 2006-08-23 | 2010-07-28 | 中国科学院计算技术研究所 | A system that supports both downloading and usage of distributed encrypted files |
| CN101068245B (en) * | 2007-03-30 | 2011-07-06 | 腾讯科技（深圳）有限公司 | Shared file issuing and downloading method and file sharing control system |
| CN101662496B (en) * | 2009-09-21 | 2013-04-03 | 中兴通讯股份有限公司 | System and method using point-to-point technology to realize file sharing |
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| WO2011032393A1 (en) * | 2009-09-21 | 2011-03-24 | 中兴通讯股份有限公司 | System and method for implementing file sharing by utilizing peer to peer technology |
| CN102378046A (en) * | 2010-08-13 | 2012-03-14 | 国基电子（上海）有限公司 | Server and method for realizing sharing of audio and video programs of set top box by using same |
| CN102487390B (en) * | 2010-12-01 | 2015-05-20 | 中国电信股份有限公司 | System and method for realizing high-capacity media stream live broadcast on basis of peer-to-peer (P2P) technology |
| CN102487390A (en) * | 2010-12-01 | 2012-06-06 | 中国电信股份有限公司 | System and method for realizing high-capacity media stream live broadcast on basis of peer-to-peer (P2P) technology |
| CN102739701B (en) * | 2011-04-06 | 2016-05-25 | 中国电信股份有限公司 | Media Stream access control method and reciprocity stream media system |
| CN102739701A (en) * | 2011-04-06 | 2012-10-17 | 中国电信股份有限公司 | Access control method of media streams and peer-to-peer streaming media system |
| CN102957729A (en) * | 2011-08-26 | 2013-03-06 | 中国移动通信集团公司 | Equipment and method for multimedia conference audio and video transmission |
| CN102957729B (en) * | 2011-08-26 | 2015-11-25 | 中国移动通信集团公司 | A kind of multimedia conferencing audio/video transmission method and equipment |
| CN103685455A (en) * | 2012-09-13 | 2014-03-26 | 株式会社理光 | Information processing device and conference system |
| US9753888B2 (en) | 2012-09-13 | 2017-09-05 | Ricoh Company, Ltd. | Information processing device and conference system |
| CN103559221A (en) * | 2013-10-18 | 2014-02-05 | 北京奇虎科技有限公司 | Multi-media data processing method and device and browser |
| CN103559221B (en) * | 2013-10-18 | 2017-08-25 | 北京奇虎科技有限公司 | A kind of method, device and browser for carrying out multimedia-data procession |
| CN111506551A (en) * | 2020-04-02 | 2020-08-07 | 深圳市创维群欣安防科技股份有限公司 | Conference file extraction method and system and computer equipment |
| CN111506551B (en) * | 2020-04-02 | 2024-04-02 | 深圳创维数字技术有限公司 | Conference file extraction method, system and computer equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2011032393A1 (en) | 2011-03-24 |
| CN101662496B (en) | 2013-04-03 |
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