CN1365070A - Video frequency request schooling service method - Google Patents
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- CN1365070A CN1365070A CN 01127603 CN01127603A CN1365070A CN 1365070 A CN1365070 A CN 1365070A CN 01127603 CN01127603 CN 01127603 CN 01127603 A CN01127603 A CN 01127603A CN 1365070 A CN1365070 A CN 1365070A
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Abstract
The present invention relates to computer network application, and the network video request service method includes sending demand information in the client end via network to dispatching server; and the centralized management of the video servers and calling corresoning video servers to response the request by the dispatching server. The present invention has large system scale, centralized management, high system utilization, low system cost, high system reliability, excellent expandability, and comprehensive function.
Description
Technical field
The present invention relates to applications of computer network field, particularly the network video-on-demand method of servicing.
Background technology
Along with the development of broadband network, video on-demand system is used will be more and more widely in the prior art.From enterprise, hotel, market, Karaoke until the huge numbers of families of community in the future use and also expand to education, ecommerce, interactive television or the like from amusement.Domestic many producers have released the product of oneself at present.But there is more deficiency in present product.Though the fluxion of supporting that has is many, owing to adopt proprietary video server price very high, an average stream is wanted several thousand yuan, and common common people are beyond affordability; Though the server of framework is lower as the video server price, scale is too little can only support more than tens or 100 stream based on INTEL (Intel) in the employing that has, and can not satisfy the demand of the large-scale dwelling house community of several one thousand families.
The major technique difficulty of video on-demand system is to solve concurrent fluxion.The main bottleneck that limits concurrent fluxion is to transmit at the I/O of network and system itself (I/O).Along with networks development, the network bandwidth continues to increase, and especially the technology of Ethernet makes bandwidth reach 100M and last gigabit, and the bottleneck of network is eliminated.The bottleneck of I/O of system own and storage is the subject matter that needs solution.External many major companies release the dedicated video server that adopts the optical fiber disk array technology can support a hundreds of concurrent stream, but prices are rather stiff.Domestic several producers adopt is the separate unit top grade based on the server of Intel Architecture as video server, only to support tens streams, maximum 100 streams.Employing reduces greatly based on the alternative proprietary video server hardware cost of the server of Intel Architecture, but separate unit is too little based on the limit that the concurrent fluxion of the server of Intel Architecture and hard disk expand, can not satisfy the market demand of large-scale VOD (Video on Demand, video request program).
Summary of the invention
Fundamental purpose of the present invention is to avoid above-mentioned the deficiencies in the prior art part and a kind of method that improves the concurrent stream utilization factor of system is provided.
Purpose of the present invention can realize like this: design a kind of video frequency request schooling service method, client is sent desired signal by network to dispatch server, this dispatch server calls the demand of corresponding video server feedback client to each video server centralized management.
The present invention has that system scale is big, centralized management, system availability height, system cost is low, system reliability is high, have good extendability, comprehensive advantage such as function.
Description of drawings.
Fig. 1 is the flow diagram of the embodiment of the invention.
Fig. 2 is the file program request schematic flow sheet of the embodiment of the invention.
Fig. 3 is that the off-line of the embodiment of the invention is adjusted schematic flow sheet.
Embodiment
The invention will be further described below in conjunction with the embodiment shown in the accompanying drawing.
As shown in Figure 1, a kind of video frequency request schooling service method, client 2 is sent desired signal by network 1 to dispatch server 6, and 6 pairs of each video servers of this dispatch server 3 are managed concentratedly, call the demand of corresponding video server 3 feedback clients 2.
6 pairs of each video servers 3 of dispatch server are divided into different online situations to be dispatched, and respectively this video server 3 will be for information about to dispatch server 6 feedbacks or report.
The present invention is divided into three to basic object: 1, client 2, represent with P; 2, dispatch server 6, represent with W; 3, video server 3, represent with S.
User's migration: the user of online request is moved on the lower video server of another load 3 from a video server 3, and does not influence watching of user.
File: comprise film, written historical materials etc.
File migration: file moves (MOVE) to another video server 3 from a video server 3.
File copy: file duplicates (COPY) to another video server 3 from a video server 3.
Off-line adjustment regularly: off-line adjustment regularly is according to regular statistics, adopts the mode of file migration, file copy, makes file reach optimum distribution on each video server 3, and guarantee point satisfies user's greatest requirements sowing time.
Online in real time is adjusted: the online in real time adjustment is according to program request state real-time on the video server 3, adopts the mode of user's migration and file copy, exceeds the present load-bearing capacity of video server 3 to satisfy user's program request under bursty state.
The video server overload: the current fluxion of this video server 3 surpasses the warning fluxion.
Warning fluxion: less than a value of video server 3 total fluxions.Being used for prompt system need carry out Real-Time Scheduling.
Warning disk space: less than a value of video server 3 total disk spaces.Being used for prompt system need increase disk or deletion file.
Reserve fluxion: reserve fluxion=total fluxion-warning fluxion.Be used for satisfying video server 3 and when overload, still can accept program request and normally move, and the bandwidth that provides file copy to need.
The file term of validity: by a time period of artificial setting, exceeding this time segment file will be deleted automatically.
The program request rate: effective video-on-demand times of this document is divided by effective program request total degree in the time regularly.
Effectively program request: the duration is effective program request above the time standard of formulating after user's program request.
Remote storage: when disk took up room greater than guard space, system transferred to the file of program request rate minimum on the remote storage device successively, as metropolitan area central server or magnetic tape station etc.When user's order request does not have on disk, but on remote equipment sometimes, system transfers on the disk from long-range.
The minimum fluxion of program merchant: system must satisfy this program merchant's program request fluxion at any time.
The maximum fluxion of program merchant: system under the prerequisite that guarantees the minimum fluxion of other program merchant suitably dynamic assignment to this program merchant's maximum fluxion.
Heartbeat: the mode that dispatch server 6 adopts polls at set intervals with video server 3 exchange messages, keep on the one hand related data synchronously, it is no abnormal to check that on the other hand system has.
Interrupt: video server 3 needs because of system or occurs when unusual initiatively to dispatch server 6 transmission information and alarms.
Polymerization: because of the change of external parameter, for example increase or reduce video server 3, hard disk, program or the like, the process that system is optimized system again according to the variation of external condition.The polymerization of this system is generally carried out when off-line is adjusted.
Dispatching method is the key of total system running.
Dispatching method and principle
The scheduling of dispatch server 6 is meant that the user moves between each video server 3.
The scheduling of dispatch server 6 is meant user's program request is distributed.
The scheduling of dispatch server 6 is meant that file duplicates or moves between video server 3.
Dispatching method is regular off-line adjustment, user's program request distribution, online in real time adjustment; Be adjusted into the master with regular off-line, online in real time is adjusted into auxilliary.Because the off-line adjustment is actually the generation in the online adjustment of prevention.Should be able to satisfy most program request demand in next time period after regularly adjusting, adjust few as far as possible the generation in real time.
The principle of off-line adjustment regularly is: according to being main sampling statistics and the program request rate that is directly proportional with the copy rate of file with prime time, the file of every video server 3 is by the matched combined of popular and unexpected winner, the summation of the shared storage space of file is few as far as possible, regularly the short more good more quantity of adjusting of cycle is few more good more, the mode that system adopts broadcasting in 24 hours and wheel to broadcast when a certain file (comprising film) program request rate surpasses certain ultimate value in a period of time is met consumers' demand, for save the system space system will delete in a period of time program request rate less than certain ultimate value or above the file of file survival period, duplicate from the primary server end automatically again when needing.
The principle that user's program request distributes is: user's order request is assigned on the video server 3 of this document and current fluxion minimum, no longer response is done in the request of this program of program request merchant file when program merchant's fluxion reaches maximum fluxion, program request divides timing will the assurance system remain fluxion greater than the minimum fluxion sum of other programs merchant all the time.
The principle of online in real time adjustment is: the file of this server taken during fluxion the maximum user of fluxion and move on the minimum video server 3 of total fluxion with this document when video server 3 reaches warning, copy on the video server 3 that current total fluxion is minimum and the disk free space is bigger from the video server 3 that takies the minimum fluxion of this document when moving can not carrying out the user.
The file on-demand process
As shown in Figure 2, client 2 can be carried out file preview and real-time VOD by scanning device access scheduling server 6.If carry out real-time VOD, carry out user's login earlier by authentication, select File is play then.Broadcast can realize common function, as full frame, F.F., left and right acoustic channels etc.
Dispatch server 6 forwards on the relevant video server 3 for the operation of carrying out the file preview, operation for real-time VOD authenticates it, the file of selecting according to client 2 and the state of present system distribute the path of associated video server 3 according to dispatching method, relevant information is put into the system status information database, the path of video server 3 is sent to client 2, submit the IP address of client 2 to video server 3, provide played file by video server 3.Dispatch server 6 is not participated in the middle of the program request, when user's off-line, and video server 3 meeting proactive notification dispatch servers 6, dispatch server 6 is revised the system status information storehouses, and carries out the backup of each program request.
User's order request information that 3 acceptance of video server are sent by dispatch server 6, the IP address that provides according to dispatch server 6 sends files to client 2, and the relevant information of recording user real-time play is as the play position of file etc.Transmission information notice dispatch server 6 when user's off-line.
The off-line adjustment process
As shown in Figure 3, every other day or two days in the minimum time period of user's program request that the keeper sets, forbid that temporarily the user logins the program request application of interrupting the user, according to dispatching method the file of each video server 3 adjusted that this process is also referred to as polymerization by dispatch server 6.This process only occurs between dispatch server 6 and video server 3 and video server 3 and the video server 3.The function that it is finished has newly-increased file, deletes overdue file, increase newly or minimizing video server 3, newly-increased or reduce hard disk etc., and then according to the sampling file clicking rate and dispatching method file is redistributed on video server 3, to reach the order request that in next program request period, satisfies maximum users.When system burden surpasses when saturated, intellectual analysis goes out concrete reason, proposes to increase the concrete reference proposition of hard disk on video server 3 or certain video server 3 to the keeper; Long-time when unsaturated when system, propose to reduce the concrete proposals of configuration; This function belongs to the system optimization part.
(system state comprises the distribution situation of each file on video server 3 to the state of the current system of dispatch server 6 records, the remanence disk space of each video server 3, information such as warning fluxion), the clicking rate of adding up each file in the sample time in data designated.When off-line is adjusted, disconnect user program request application, the newly-increased or conditions such as deleted file and video server 3 according to current system state, clicking rate statistics and keeper's needs according to dispatching method and principle, draw best distribution matrix and file migration order.Sending instruction gives each video server 3 according to the appointed method migrated file.Supervision and detection file are dispatched on request and are finished, and user's program request is recovered in update system status information storehouse.Statistics is because of the limited order request that can't respond of system's ability to bear, and analyzes its reason, proposes to increase the reference proposition of video server 3 or hard disk to the keeper.Long-time when unsaturated when system, propose to reduce the concrete proposals of configuration.
The file migration instruction that video server 3 sends according to dispatch server 6, migration and xcopy between video server 3 and video server 3 are up to the requirement that reaches dispatch server 6.Video server 3 all needs to notify dispatch server 6 after each migration is finished or during aborted.
Online adjustment process
The mode of online adjustment has three kinds: 1, according to current system state the order request of client 2 is distributed; 2, client 2 is moved between video server 3; 3, file duplicates between video server 3.On-line scheduling mainly solves the program request application of some burst.
Dispatch server 6 occurs need carrying out online adjustment to file and user when saturated when system burden.Dispatch server 6 calculates optimum adjustment scheme according to current system state and on-line scheduling method, adopts above-described scheduling mode, and notice video server 3 is adjusted.
Video server 3 is adjusted active user and file according to the instruction of dispatch server 6.
Security of system.Analyze various because system itself and extraneous people are factor and the means that cause system's cisco unity malfunction, take corresponding precautionary measures, in maximum the protection system operate as normal.For example illegally usurp attack server, harm such as consumption systems file.
Fault detect and recovery.The mode that fault detect is adopted poll and interrupted combining.Dispatch server 6 adopts the mode of timing to each video server 3 polls, checks that video server 3 has no abnormal and deadlock, and whether the resident program in the video server 3 has response, and this process is also referred to as " heartbeat ".Resident fault detection program in the video server 3 is initiatively reported to the police to dispatch server 6 when going wrong, and this process is also referred to as " interruption ".Automatically repair or notify the keeper to fault then.Fault comprises: the two-node cluster hot backup of dispatch server 6 is realized; Client 2 program request aborted; The hardware and software fault of video server 3, as crash, hard disk is bad, server bad needs change or the like; Exchange fault.
System charges.According to charging method user's program request is chargeed.
Advertising management.According to ad playing and charging method advertisement is managed.Professional such as seeing that advertisement is supplemented with money etc.
Telemanagement.All functions at local management are implemented in telemanagement, such as long-range interpolation and deleted file, remote repairing fault, the long-range system state or the like of checking.
The network that the present invention uses comprises network what follows.Network 1 is internet (Internet); Network 1 is a cable TV network; Network 1 is a LAN (Local Area Network).The present invention can be applicable in arbitrary network of above-mentioned network, and range of application is wider.
At present domesticly main severally all also do not release complete VOD cluster server solution based on computer network with based on the VOD producer of the video server of Intel Architecture.Prior art also just puts together the VOD server of many standalone versions simply, puts identical program on every station server.Then with user grouping, every group access specified server.Comparing the present invention mutually has the following advantages:
On system's fluxion, the present invention can support from 100～1000 concurrent fluxions.But no matter be that external proprietary VOD video on-demand system or domestic VOD system maximum based on Intel Architecture are also just supported 400～500 concurrent fluxions.
The memory capacity aspect, a video server of the present invention 3 is calculated by configuration 150G, 30 cluster, the actual active volume of system has 4000G, and this is that the VOD system of prior art is beyond one's reach.
User's centralized management.The VOD server of prior art is owing to be independently each other, and user's registration, authentication also all are opposition, like this can't unified management for a large number of users.User management of the present invention all is to finish by dispatch server 6, can adopt same data base administration.
The centralized management of file.If increase or delete a file, prior art need be to every station server operation, and as long as the present invention is single job, and other work is finished automatically by system.
The centralized management of charge.The charge of prior art record is all finished by different servers, is not easy to unified charge, and charge of the present invention record is all on a station server, convenient inquiry.
Be convenient to statistics.The present invention is incorporate, can add up various data, as adding up user, file, program merchant and file program request rate or the like data, as various reference frames.
Improve the utilization factor of concurrent stream.The present invention adopts the mode of dynamic assignment user order request, current fluxion according to every video server 3, make full use of idle file, and prior art is because user's fixed server, so the full situation of server that the server free time that can have has is not brought into play the maximum effect of system.
Improve the utilization factor of disk storage.Must put same program according to the every station server of prior art, and the present invention only duplicates to overheated file to all program uniform dispatching, saves hard drive space greatly.For example, prior art one station server 500G hard disk, 20 need the 10000G hard disk altogether, can only put the program of 500G, and adopt the present invention, the program of 500G is placed on 20 video servers 3, need be according to dispatching method of the present invention, need the space (comprising the program that duplicates) of 700G at most, only account for 7%, can save 93% hard drive space.
Reduce hardware cost.The present invention can make system adopt low-grade video server 3, IDE (Inter Grated Drive Eletronics, a kind of interface modes) hard disk and IDE RAID (Redundant Array of Independent disk, raid-array) card, high-grade server, SCSI RAID card and SCSI (SmallComputer System Interface, a kind of interface modes) hard disk that adopts than present prior art hangs down one times.Can reduce though separate unit video server 3 is compared fluxion, the fluxion of cluster can reach thousands of streams, and on average the cost of each stream is other half, has high cost performance.
Save disk storage space.The disk expense is a maximum part among the VOD, and 93% the disk space can saved by last surface analysis greatly reduces system cost.
Reduce software cost.Design has only a dispatch server 6 according to the present invention, and video server 3 has many, so only installation system software, account software, management software and database on dispatch server 6, video server 3 adopts cheap LINUX operating system.And the every station server of prior art is installed same software, for example database, authentification of user, charging or the like, and software overhead increases greatly.
Fault recovery and warning.When system breaks down, system can in time find and repair automatically, can report to the police automatically if system can't repair voluntarily, and adopt fool's design aspect fault recovery, administrator just specifies will be according to the system prompt simple operations, and other work are finished automatically by system.
The extendability of concurrent fluxion.Because the present invention adopts the cluster design philosophy, system increases if desired or to reduce system's fluxion very convenient, only need to increase or reduce a video server, the keeper installs and operation without any need for the software of complexity, only need parameter simply is set on dispatch server 6, other work systems can be finished automatically.And one of prior art increase also needs to reinstall system software, and xcopy is provided with IP or the like.
The extendability of hard disk.The present invention can increase hard drive space arbitrarily according to user's demand, if separate unit video server 3 can reach 1000G, 20 cluster can reach 20000G.And prior art is to put same content owing to every, and available space just has only 1000G.
The extendability of software.Software of the present invention is by dispatch server 6 unified managements, adopts standard program language and data-interface, can be with various softwares such as advertising management, encrypt VOD, ecommerce or the like compatibility.
The present invention can provide VOD relevant various functions with the operation strategy according to user's different demands, as accounting management, program merchant management, file management, advertising management, telemanagement or the like, and system can analyze according to the ruuning situation of self, points out the supvr need increase or reduce video fluxion and disk space automatically.
For example the present invention is applied in the community network of Great Wall Broadband Network Service Company Limited.The Great Wall Broadband Network Service Company Limited net is to adopt the 10/100M switching Ethernet in community, and resident family is by computer or have the set-top box online of network interface.A plurality of communities are joined together to form the section, and a section generally comprises several thousand resident families.Coincidence by 30% calculates, and video request program need be supported the system of 1000 concurrent streams.Equipment of the present invention is placed on the section central machine room, for several thousand resident families of this section provide video-on-demand service.The keeper can realize the system of each section of telemanagement by the Metropolitan Area Network (MAN) center, comprises user management, program updating, inquiry about charging, condition monitoring etc.Can have a plurality of program merchants on platform of the present invention for resident family provides service, resident family can be according to price and services selection program merchant's program.
Claims (12)
1. video frequency request schooling service method, it is characterized in that: client (2) is sent desired signal by network (1) to dispatch server (6), this dispatch server (6) calls the demand of corresponding video server (3) feedback client (2) to each video server (3) centralized management.
2. video frequency request schooling service method according to claim 1, it is characterized in that: dispatch server (6) is divided into different online situations to each video server (3) to be dispatched, and respectively this video server (3) will be for information about to dispatch server (6) feedback or report.
3. video frequency request schooling service method according to claim 2 is characterized in that: the scheduling of dispatch server (6) is meant that the user moves between each video server (3).
4. video frequency request schooling service method according to claim 2 is characterized in that: the scheduling of dispatch server (6) is meant user's program request is distributed.
5. video frequency request schooling service method according to claim 2 is characterized in that: the scheduling of dispatch server (6) is meant that file duplicates or moves between video server 3.
6. video frequency request schooling service method according to claim 2 is characterized in that: dispatching method is regular off-line adjustment, user's program request distribution, online in real time adjustment; Be adjusted into the master with regular off-line, online in real time is adjusted into auxilliary.
7. video frequency request schooling service method according to claim 6, it is characterized in that: the principle of described regular off-line adjustment is: according to being main sampling statistics and the program request rate that is directly proportional with the copy rate of file with prime time, the file of every video server 3 is by the matched combined of popular and unexpected winner, the summation of the shared storage space of file is few as far as possible, regularly the short more good more quantity of adjusting of cycle is few more good more, the mode that system adopts broadcasting in 24 hours and wheel to broadcast when a certain file (comprising film) program request rate surpasses certain ultimate value in a period of time is met consumers' demand, for save the system space system will delete in a period of time program request rate less than certain ultimate value or above the file of file survival period, duplicate from the primary server end automatically again when needing.
8. video frequency request schooling service method according to claim 4, it is characterized in that: the principle that described user's program request distributes is: user's order request is assigned on the video server (3) of this document and current fluxion minimum, no longer response is done in the request of this program of program request merchant file when program merchant's fluxion reaches maximum fluxion, program request divides timing will the assurance system remain fluxion greater than the minimum fluxion sum of other programs merchant all the time.
9. video frequency request schooling service method according to claim 6, it is characterized in that: the principle of described online in real time adjustment is: the file of this server taken during fluxion the maximum user of fluxion and move on the minimum video server (3) of total fluxion with this sheet when video server (3) reaches warning, copy on the video server (3) that current total fluxion is minimum and the disk free space is bigger from the video server (3) that takies the minimum fluxion of this sheet when moving can not carrying out the user.
10. video frequency request schooling service method according to claim 1 is characterized in that: network (1) is internet (Internet).
11. video frequency request schooling service method according to claim 1 is characterized in that: network (1) is a cable TV network.
12. video frequency request schooling service method according to claim 1 is characterized in that: network (1) is a LAN (Local Area Network).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011276037A CN1168037C (en) | 2001-07-05 | 2001-07-05 | Video frequency request schooling service method |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB011276037A CN1168037C (en) | 2001-07-05 | 2001-07-05 | Video frequency request schooling service method |
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| CN1365070A true CN1365070A (en) | 2002-08-21 |
| CN1168037C CN1168037C (en) | 2004-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB011276037A Expired - Lifetime CN1168037C (en) | 2001-07-05 | 2001-07-05 | Video frequency request schooling service method |
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| CN (1) | CN1168037C (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007104217A1 (en) * | 2006-03-13 | 2007-09-20 | Huawei Technologies Co., Ltd. | Electronic program guide service system and establishing and operation method thereof |
| CN101754236A (en) * | 2009-12-22 | 2010-06-23 | 重庆重邮东电通信技术有限公司 | Technical parameter measuring and calculating model of time division synchronization code division multiple access (TD-SCDMA) network centralized monitoring system |
| CN101783929A (en) * | 2010-03-04 | 2010-07-21 | 北京惠信博思技术有限公司 | Method for sending heartbeats to video server by set top box |
| CN101855779A (en) * | 2007-11-12 | 2010-10-06 | 松下电器产业株式会社 | Data communication device, terminal device, and data communication system using the same |
| CN101453621B (en) * | 2007-12-03 | 2011-05-11 | 北大方正集团有限公司 | Method, system and device for video server resource sharing |
| CN102164152A (en) * | 2010-02-23 | 2011-08-24 | 浙江省公众信息产业有限公司 | Method and system for remotely processing files |
| CN106210774A (en) * | 2016-08-30 | 2016-12-07 | 成都奥科睿科技有限公司 | The video and audio VOD system of distributed expandable and using method thereof |
| CN109348250A (en) * | 2018-10-31 | 2019-02-15 | 武汉雨滴科技有限公司 | A kind of method for managing stream media data |
-
2001
- 2001-07-05 CN CNB011276037A patent/CN1168037C/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007104217A1 (en) * | 2006-03-13 | 2007-09-20 | Huawei Technologies Co., Ltd. | Electronic program guide service system and establishing and operation method thereof |
| CN101313573B (en) * | 2006-03-13 | 2010-12-22 | 华为技术有限公司 | Electronic program service system, establishing and operating method |
| CN101855779A (en) * | 2007-11-12 | 2010-10-06 | 松下电器产业株式会社 | Data communication device, terminal device, and data communication system using the same |
| CN101453621B (en) * | 2007-12-03 | 2011-05-11 | 北大方正集团有限公司 | Method, system and device for video server resource sharing |
| CN101754236A (en) * | 2009-12-22 | 2010-06-23 | 重庆重邮东电通信技术有限公司 | Technical parameter measuring and calculating model of time division synchronization code division multiple access (TD-SCDMA) network centralized monitoring system |
| CN101754236B (en) * | 2009-12-22 | 2013-02-27 | 重庆重邮东电通信技术有限公司 | Technical parameter measuring and calculating model of time division synchronization code division multiple access (TD-SCDMA) network centralized monitoring system |
| CN102164152A (en) * | 2010-02-23 | 2011-08-24 | 浙江省公众信息产业有限公司 | Method and system for remotely processing files |
| CN101783929A (en) * | 2010-03-04 | 2010-07-21 | 北京惠信博思技术有限公司 | Method for sending heartbeats to video server by set top box |
| CN106210774A (en) * | 2016-08-30 | 2016-12-07 | 成都奥科睿科技有限公司 | The video and audio VOD system of distributed expandable and using method thereof |
| CN109348250A (en) * | 2018-10-31 | 2019-02-15 | 武汉雨滴科技有限公司 | A kind of method for managing stream media data |
Also Published As
| Publication number | Publication date |
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| CN1168037C (en) | 2004-09-22 |
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Address after: 518000 computer building of the Great Wall, Nanshan District science and Technology Park, Shenzhen, Guangdong Patentee after: China the Great Wall science and technology group Limited by Share Ltd Address before: 518057 Nanshan District science and Technology Park, Shenzhen, Guangdong Patentee before: China Changcheng Computer Shenzhen Co., Ltd. |
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Granted publication date: 20040922 |
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