CN1376993A - Digitalized audio-video information resource system for remote education and its implementing method - Google Patents
Digitalized audio-video information resource system for remote education and its implementing method Download PDFInfo
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Abstract
A digitalized audio-video information resource system for remote educatino is composed of information acquisition and edit system, andio-video informatino resource library system, user application system, and management system. It features that the hybrid architecture of said audio-video information resource library stem for integrating the advantages of B/S and C/S, hierarchical data managing mode, parallel presentation layer function layer/data layer/information service layer, two server systems for information service layer, and advanced stream medium technique.
Description
Technical field
The present invention relates to a kind of journey education digitalized audio-video information resource system, belong to infotech and internet
Technical field.
Background technology
The arrival of information society makes information network become the mainstay of modern education training information construction.The particularly application of education and training network has changed traditional education and training mode and means, and the Web-based instruction, training on the net and long-distance education come true, make education and training produce qualitative leap.In implementing the informationalized process of education and training, the construction of information resource system is a key foundation works.Current, the construction of education and training information network has formed scale, and each universities and colleges and units concerned have all set up the garden net, yet the hysteresis of construction of information resources has had a strong impact on the application of network.Audio and video information is a most important component in the information, its memory capacity is big, resource occupation is many, real-time, the technical requirement height is " bottleneck " in information processing, storage, transmission and the display technique, therefore, the construction of digitalized audio-video information resource system is regarded as emphasis and difficult point in the information resource system construction.
Develop online audio-video information resource and comprise two aspects.Be to continually develop new audio-video information resource on the one hand, will effectively utilize existing audio-video information resource on the other hand.Yet people but only pay attention to dropping into huge fund, cost plenty of time and the new online audio-video information resource of energy exploitation, and ignore the effective utilization to existing audio-video information resource.According to statistics, at the bottom of nineteen ninety-five, the audio-video electronic teaching material that China is used to educate: magic lantern, transparency are 8.3 hundred million; Recorded materials 1,716 ten thousand hours; Video text 1,708 ten thousand hours; 280,000 of computer teaching softwares; 3.9 ten thousand of CDs.These all are the crystallizations that China educational circles work in decades, have dropped into a large amount of funds.Only be example with the video text, by minimum cost of manufacture calculating at that time, it just is worth above 1,000 hundred million yuan.Therefore, develop the new audio-video information resource that is adapted at using on the wide area network and effectively utilize existing audio-video information resource, become problem demanding prompt solution.
Because audio-video information resource key technologies for application on wide area network is still unresolved, make that a large amount of audio-video information resources is not effectively used on the net, cause the online education information resources to lack, seriously restricted normally carrying out of web-based teaching, training on the net and modern distance education.Therefore, build digitalized audio-video information resource system for remote education and become the task of top priority.
At present, how the domestic information resource database of building is based on text, even what have contains audio and video information, also because its small scale, storage, management structure are unreasonable, automaticity is not high, and there are defective in network sound, video transmission technologies, causes it normally not move in wide area network.
Two kinds of methods of the many employings of audio frequency and video part in the existing multimedia messages resources bank, the one, the same with the text picture, directly adopt the mode of file transfer, this method makes the efficient of audio-video document low, weak effect can not satisfy the requirement of the desired fast browsing of long-distance education, retrieval and real-time play, multipath concurrence audio frequency and video; The 2nd, adopt VOD (video request program) technology, this is present popular technology.The VOD system is of a great variety, and characteristics are respectively arranged, but all exists identical weakness; , file layout disunity or conversion difficulty weak, require that player is special, system is unstable and problem such as interactive function difference as: remote access capability, in addition, VOD system price costliness, 100 about 100,000 Renminbi of user, make its can not be on wide area network large-scale promotion.
Summary of the invention
Technical matters to be solved by this invention is gordian technique such as extensive storage administration, fast browsing retrieval, multipath concurrence, real-time play and the remote interaction application of audio and video information on wide area network and realizes sharing of audio-video information resource in the wide area network; Thereby provide a kind of digitalized audio-video information resource system for remote education and its implementation that collects information acquisition, processing, storage, management, transmits, is shown as the distribution interactive large-scale synthesis of one.
The technical solution adopted for the present invention to solve the technical problems is as follows:
One, digitalized audio-video information resource system for remote education
It is by information collection system, audio-video information resource storehouse system, and user's application system, management system are formed (see figure 1).
Described information collection system is made up of information acquisition subsystem and information resources editor subsystem, these two subsystems are connected with audio-video information resource storehouse system by network, and the information collection subsystem comprises audio frequency and video workstation, nonlinear editing system, audio frequency and video input equipment and picture input equipment, high resolution display;
In the described audio frequency and video workstation audio-video collection card is housed; Audio frequency and video input equipment and picture input equipment connect the input end of audio frequency and video workstation, and nonlinear editing system is connected by network with the audio frequency and video workstation, and high resolution display connects the output terminal (see figure 2) of audio frequency and video workstation;
It is that browser/server+C/S is that the architecture that client/server combines is the hybrid architecture (see figure 3) that described audio-video information resource storehouse system adopts B/S, so that give full play to B/S and C/S structure advantage separately.On functions such as user's use, telemanagement, use the B/S structure can simplify user's operation easier, be user-friendly to realization with telemanagement; Put in storage in batches in resource, aspect such as database system management adopts the C/S structure, but dirigibility, the reliability of enhanced system management.This mixed structure has following characteristics:
Guaranteed the security of sensitive data.Because to administering and maintaining of database, can only operate by the application program of friendly interface by the keeper under the C/S structure.
Effectively utilized the computer resource in the wide area network, removed the CLIENT PROGRAM of remote user end from and installed, convenient for users to use, enlarged the usable range of resources bank.
Both guarantee the stronger interactivity of sophisticated functions such as data typing modification, guaranteed the convenience that the general user uses again.For functions such as data typing, modifications, resource pool management person can manage by specific data base administrator, and the general user then carries out database navigation and material program request by general browser, is simple and easy to usefulness, need not give training fully.
System maintenance is simple.If the database client interface needs to revise,,, only need edit just passable to the client end interface in the Web server so need not do any change to client fully because the client use is general browser.If desired client-side program is made amendment under the C/S structure, then need to compile new application program and send to client and reinstall, and also need different installation procedures for different operating system.
The data management pattern adopts the data management pattern (seeing Fig. 4,5) of layer distributed, promptly utilizes presentation layer/functional layer/data Layer/various requests of information service layer four-layer structure parallel processing; Each functional module is effectively distributed physically, especially information service layer being used two above servers is video server and audio frequency and picture servers distributed storage video, audio frequency and picture resource, the advantage of this data management pattern is that system response time is fast, and updating maintenance is convenient.Because system adopts dissimilar request of four-layer structure parallel processing and the storage of resource distribution formula, thus improved the response speed of system greatly, active balance system load, strengthened the concurrent ability of system.Because the modular design of system reduces the cost of maintenance system greatly, maintenance work is simple.
The transmission of audio frequency and video, broadcast format adopt stream media technology.Stream media technology is in order to adapt to the needs of Network Transmission playing audio-video document, to adopt the audio/video flow buffering to carry out a kind of technology of real-time Transmission and playing audio-video document.It adopts the method for " broadcast while downloading ", promptly downloads a part of audio-video frequency content earlier to the audio frequency and video buffer zone from server, then plays, and continues simultaneously to download, and for ensuing broadcast is got ready, and the data of playing is abandoned.This stream media technology helps to solve the problem of real-time Transmission in the wide area network, playing audio-video difficulty.
The following (see figure 6) of the hardware configuration in audio-video information resource storehouse: it includes host exchange, switch, web server, database server, video server, audio frequency and picture servers, system management machine; Above-mentioned four servers are connected with wide area network by host exchange, and the system management machine is connected with host exchange by switch; Information server is that video server, audio frequency and picture servers are equipped with disc array system and magnetic tape station respectively;
User's application system comprises that the user browses subsystem, user inquiring subsystem and user and uploads subsystem.
Management system is made up of user management subsystem and management of information resources subsystem two parts; Management of information resources subsystem is made up of local management subsystem and telemanagement subsystem.
Described audio frequency and video workstation adopts high-end PC; The audio-video collection card adopts the WINNOV capture card; Nonlinear editing system adopts the DPS system.
Described audio frequency and video input equipment is: video camera, video recorder, video disc player, audio-frequence player device, MIDI compositor, microphone; The picture input equipment is: image reading apparatus, Digital camera.
Described user's application system is to utilize audio-video information resource remote browse, retrieval and the management system of dynamic web page technique, Web database technology, distributed data base technique and relevant com component technological development.
Two, the implementation method of digitalized audio-video information resource system for remote education
It is made up of information collection system, audio-video information resource storehouse system, user's application system, management system; The architecture of described audio-video information resource storehouse system is: the B/S+C/S hybrid architecture; Its specific implementation method is the several different methods that adopts stream media technology to combine with database technology at server end, the system transaction processing logic is put in server end, thereby given full play to the power of server, use web and Streaming Media mode that the audio and video information service is provided, system user only need adopt the web browser and the media player of default installation in the operating system, can realize the visit of long-range audio-video information resource by TCP/IP and corresponding stream media protocol; Simultaneously,, make the system manager on arbitrary REMOTE MACHINE, in time finish the part management function, be convenient in time find and deal with problems fast by the management function that the web mode provides; Need safety, flexible, characteristics of high efficiency at system management, developed system manager's program, at the leading subscriber end this program is installed, and cooperates the corresponding service routine of server end, finish the configuration effort of rapid batch management, systemic-function and the environment of audio and video information and system user;
The data management pattern of audio-video information resource storehouse system adopts the data management pattern of layer distributed.Its concrete grammar is: the one, aspect system logic, on the basis of traditional presentation layer/functional layer/data Layer three-decker, add an information service layer (audio and video information storage, issue), the body matter of audio and video information is stored with document form, is the supplementary of audio and video information that contents such as index, key frame, brief introduction, key word, path deposit database in, adds the audio and video information push module simultaneously; Like this, after system user sends request by presentation layer, carry out browsing data by functional layer, function treatment such as retrieval, and be connected with database by carrying out corresponding extension application, to database server the data processing application is proposed by the SQL mode, data Layer is carried out data process method, accept of the request of web server to data base manipulation, realization is to the data library inquiry, revise, functions such as renewal, operation result is submitted to functional layer, functional layer is play with the streaming of obtaining audio and video information according to data Layer operation result guiding user access information service layer, services such as download.The 2nd, on system architecture, each functional module is effectively distributed physically, especially information service layer (main body of audio-video information resource) is carried out the high scalability physical distribution.Its way is physical distribution Web server, database server, video server, audio frequency and picture servers, also can further expand as required or shrink simultaneously, to adapt to different demands.
Described information collection system by following mode with the external source audio and video information warehouse-in (see figure 7) of gathering and editing:
Described information collection system by following mode with the external source audio and video information warehouse-in of gathering and editing: various separate sources, the external source audio and video information of different-format is connected with system by the various distinct interfaces that the information collection system provides, if simulating signal, after then need carrying out corresponding A/D conversion formation high quality digital signal through the information acquisition subsystem, add in information editing's subsystem, if the source is digital signal, then directly add in information editing's subsystem, information editing's subsystem is mainly carried out Edition Contains to the digitizing audio and video information, picture color is adjusted, denoising, smooth operation, its output is then according to the form difference of audio-video information resource, can optionally convert thereof into and be adapted at the wide area online browsing by the information resources format converting module, transmission and the audio-video information resource form that shows, the keeper examines the audio frequency and video and the picture file that generate, if its content, the form of expression or the requirement of non-conformity of quality assembly system, the editor's subsystem that then sends a message back remodifies editor, satisfactoryly then resource is added in the system of audio-video information resource storehouse by system supervisor, system supervisor is finished the resource storage administration automatically, work such as data link, also resource is backed up simultaneously, status checking and examination, if pinpoint the problems, supervisory routine is reported to the police automatically, for content, the form of expression or non-conformity of quality assembly system require information resources, and the editor's subsystem that then sends a message back remodifies editor.
Described user's application system according to user right carry out that respective remote is browsed, inquiry and upper and lower year information resources, it is audio-video information resource remote browse, a searching system of utilizing dynamic web page technique, Web database technology, distributed data base technique and relevant com component technological development; It comprises that the user browses subsystem, user inquiring subsystem and user and uploads subsystem; The major function that the user browses subsystem is to use the family to locate fast according to the information resources classification, finds the information resources that oneself need rapidly, mainly contains two key work, and the one, browse the quick demonstration of directory tree, be convenient to safeguard; The 2nd, information resources show fast, content is detailed; The inquiry of audio-video information resource system is different because of the difference of audio-video information resource, and for video information resources, its inquiry mainly contains aspects such as program title, production unit, creator, featured performer and descriptor; For the audio-frequency information resource, its inquiry mainly contains aspects such as title, author, performance (sing, say) person and keyword; For the pictorial information resource, its inquiry mainly contains aspects such as title, key word, content description, file type and entry time; Simultaneously, the user inquiring subsystem also has the multiple inquiry form of " compound query " and " inquiring about " in the result; Because the singularity of audio-video information resource, to the content of resource table in the audio-video information resource database except comprising above common description field, also add " key word " field, it mainly is to be used for audio-video information resource is further described, to determine the content of its performance, make things convenient for user inquiring; User's file upload is the sign of open system, add telemanagement file upload administration module rear keeper's telemanagement.
Described management system is divided into user management subsystem and management of information resources subsystem; Be used for managing " system " all users and information resources; The user management subsystem is mainly used in classification and don't bother about the reason different user, by suitable authority restriction, guarantees that the user uses, the acoustic image resource of management different stage; Management of information resources subsystem can fast browsing, change, deletion information resources; Except the general deletion information resources of information resources, modification information resources key word function, because audio-video information resource kind difference, the corresponding contents of the management of information resources is also different; Being primarily aimed at its program title, production unit, creator and featured performer for video information resources safeguards; Being primarily aimed at its title, performance (play, say) person, write words (song) etc. for the audio-frequency information resource safeguards; Being primarily aimed at its title, content description etc. for the pictorial information resource safeguards; Management of information resources subsystem is divided into local management subsystem and telemanagement subsystem, the local management subsystem is a system supervisor based on the C/S structure, be mainly used to realize that the information resources storage organization is management, the maintenance of genealogical classification directory tree, information resources are added fast in batches, are revised and deletion, make the keeper can manage native system efficiently and safely; Administrator program is to use the C/S structure to realize, the C/S structure realizes user interface and information management function with client application, system user can be uploaded corresponding file, the telemanagement subsystem has the function of management file upload simultaneously, make keeper's leading subscriber file upload efficiently, in time browse file, the unwanted file of deletion system that the user uploads, revise inappropriate descriptor, ensure that legitimate files enters browsing database rapidly, convenient all users use.
Native system also comprises the security of system design
(1) shielding resource path assembly
Shielding resource path assembly is the server side functionality module; it mainly acts on is in order to protect the safety of audio-video information resource; making the user in the visit audio and video information, do not expose the physics or the virtual route of audio and video information, is that effectively anti-locking system is by a kind of method of unauthorized access.Its main method is when the user capture audio and video information, after shielding resource path assembly obtains user's request of access, at first open this audio-video information resource, and then send to the user, avoid exposing the information resources store path to the user, its function class is similar to acting server, but data volume is little, performance is more targeted, better effects if.
(2) web server filter
It belongs to web server plug-in unit, and its major function is by the request of interception user to the web server, if discovery user request is audio-video information resource, will verify user's identity, with the shielding illegal request.
The principle of work and the process of native system are as follows:
1, the information collection system only needs simple the setting just can be converted into the exercisable formatted files such as (rm, wmv, mpg) of system to various general audio-video documents, and deposits file server respectively in by corresponding hardware environment.
2, resource manager is by setting up corresponding video, audio frequency and picture classification structure, and audio frequency and video, the picture file that is kept in the file server carried out work such as batch warehouse-in, association, description, classification.
3, the user will visit native system, at first needs registration, becomes 2 grades of users of native system by filling in log-on message, and the user of different stage can visit the information resources of different stage, if the user needs upgrading, must be undertaken by the system manager.
4, the registered user passes through browser, visit the web server in the web mode, server is by the Query Database server system, provide the function of user's fast browsing audio frequency and video and pictorial information with the form of resource classified browse directory tree structure, the user also can search the information needed resource by multiple way of search combination.For the required audio/video information resource of user, can understand the content of audio/video information on the one hand by character introduction, picture introduction fast, the mode that also can flow is play this information in real time, fast to understand detailed content; On the other hand, need download the information of use for the user, confirm system by the authority of system, the different ratio of compression versions of downloading this information use to local.
5, the registered user submits to system with the information resources of this locality if desired, then can upload subsystem by the user and finish, and the resource after the submission can enter browsing database after system manager's examination.
6, system management can be undertaken by web mode and C/S mode.It can finish batch interpolation, modification, deletion and the differentiated control of information resources; Browse the maintenance of bibliographic structure; All workings such as user's registration, upgrading, deletion.
Beneficial effect of the present invention is as follows:
But 1 management resource kind is many, memory capacity can dynamically increase and decrease as required.
2, management automation degree height
System utilizes goods receiving program, client browing system and a plurality of com component to carry out resource automatically to go into work such as library management, browse queries and security control in batches, alleviated the system management workload, improved display efficiency, strengthened security of system.
3, support long-distance user's Real-time and Concurrent playing audio-video information resources
System has adopted Real Server and MediaServer media services software, make a plurality of users long-range can the real-time VOD audio/video program, also support the user that audio/video program dragged broadcast in real time.
4, support long-distance user's fast browsing, inquiry and upper and lower year audio-video information resource
System has adopted the resource management scheme of layer distributed, also browse simultaneously for the user provides good, query interface and several data search method, make the user browse, to inquire about information resources quickly and easily, also can upper and lower as required year acoustic image breath letter resource.
Description of drawings
Fig. 1 is a system architecture diagram of the present invention.
Fig. 2 is an information collection system principle diagram of the present invention.
Fig. 3 is the synoptic diagram of the hybrid architecture of information resource database of the present invention system.
Fig. 4 is the layer-stepping data management synoptic diagram of information resource database of the present invention system.
Fig. 5 is the DDM synoptic diagram of information resource database of the present invention system.
Fig. 6 is the hardware configuration of information resource database of the present invention system.
Fig. 7 is system information flow process figure of the present invention.
Fig. 8 is a file loading synoptic diagram of the present invention.
Embodiment
Be an embodiment of technique scheme of the present invention below:
1, information collection system
Described information collection system is made up of information acquisition subsystem and information resources editor subsystem, these two subsystems are connected with audio-video information resource storehouse system by network, and the information collection subsystem comprises audio frequency and video workstation, nonlinear editing system, audio frequency and video input equipment and picture input equipment, high resolution display;
(1) hardware configuration
The hardware of information collection system mainly comprises audio frequency and video workstation, nonlinear editing system, audio frequency and video input equipment, picture input equipment and audio-video collection equipment.The desk-top business PC of wherein selecting a PIII800M CPU who adds the WINNOV capture card, 256 MB of memory for use is as the audio frequency and video workstation, audio frequency and video input equipment and the existing educational technology equipment of picture input equipment comprise: the non-line of DPS Velocity is compiled equipment such as system, DVCPro Video Camera, BETACAM Video Camera.The audio-video collection card adopts compatible good WINNOV capture card, and it can compatibility (asf, rm form).
(2) software arrangements
A, operating system
Windows?2000?Professional
B, process software
Ulead?MediaStudio，Perimere，Photoshop
2, audio-video information resource storehouse system
This system forms (see figure 1) by video resource storehouse subsystem, audio resource storehouse subsystem and picture resource storehouse subsystem, is used for storage, the management work of digitalized audio-video resource, comprises that resource puts in storage in batches, long-rangely uploads, revises and deletion etc.
(1) hardware configuration
The server of native system and memory device are selected following product:
Web server is selected the E-40 server of Hewlett-Packard Corporation for use, hardware configuration: the processor of Pentium Pro200,128M internal memory, 10.2GSCSI hard disk.Software arrangements: Windows 2000 Server+SP2 operating systems use IIS5.0 to be Web server.
Database server is selected HP E-800 server for use.Since extremely important in the database server by the data of keeper's typing, be that system disk is done the disk mirroring backup so adopt Raid-1.Concrete configuration is hardware: Pentium-III733 CPU, 128M internal memory, two of 10.2G hard disks.Software: Windows 2000Server+SP2 operating system; SQL Server7.0 database.
In the information resources service device, adopt the LH6000 of Hewlett-Packard Corporation server as video server, the LH4 of Hewlett-Packard Corporation server is as audio frequency and picture servers.Consider the information resources service device to the requirement of internal memory than higher, for example Real server and Realserver Plus require server that the internal memory of 256M is arranged, the RealserverProfessional of installation code just needs the 512M internal memory, if video server need provide the concurrent user more than 1000 just to need 768M internal memory at least.The hardware concrete configuration of LH6000 is: Pentium-IIIXeon 700M CPU (1M buffer memory), 1G internal memory, 9.1G system disk and use Raid card connection 7
*One of 73G Ultra2 wide disk array, software is: each cover of Windows2000 Server operating system, MediaServer4.0 and Real server 8.0 video server softwares.The hardware configuration of LH4 is: Pentium-III Xeon 550M CPU (1M buffer memory), 512G internal memory, 9.1G system disk and use Raid card connection 5
*One of 50G Ultra 2 wide disk array.
(2) software arrangements
1. server OS
Windows?2000?Server+SP2
2. Database Systems
SQL?Server?2000
3. system supervisor
Develop system supervisor and a plurality of com component voluntarily with DEPHI, VC etc., with the long-distance management system of exploitations such as ASP based on the B/S structure based on the C/S structure.
4. media services software
The Media Server of Microsoft and the RealServer 8.0 of RealNetwork company etc.
3, user's application system
This system according to user right carry out that respective remote is browsed, inquiry and upper and lower year information resources.The user uses web browser access information resources file.Hardware can adopt Pentium-III 450MHz processor, 64MB internal memory, 10G hard disk, TNTM646 video card, 15 cun displays, Hi-Fi sound-box.Software can adopt Windows98 operating system, IE5.0 browser, Realpaly8.0 and MediaPlay7.0 player.
The major function of native system is as follows:
1, changes and edits the acoustic image resource automatically
System not only can carry out digital conversion to existing simulation audio-video information resource, can also carry out format conversion and editing to the digitalized audio-video information resource of different-format.
The audio and video information of 2, safe and efficient storage, management big data quantity
System can carry out Classification Management to the digitalized audio-video information of big data quantity, and the optimal Storage structure guarantees audio-video information resource storage safe, efficient administration.
3, fast browsing, many conditional information retrievals and upper and lower year audio-video information resource
System user can be visited the audio-video information resource of appropriate level according to user class separately, pass through tree type menu fast browsing audio and video information in client, also audio and video information that can be required according to multinomial key search can also upper and lower as required year audio and video information.
4, real-time play audio-video document is shared audio-video information resource
Support the wan user in real time, multichannel, quick, concurrent access system, the shared system audio-video information resource.
5, system carries out interactive operation by customer requirements.
Claims (9)
1, a kind of digitalized audio-video information resource system for remote education is characterized in that it by information collection system, audio-video information resource storehouse system, and user's application system, management system are formed;
Described information collection system is made up of information acquisition subsystem and information resources editor subsystem, these two subsystems are connected with audio-video information resource storehouse system by network, and the information collection subsystem comprises audio frequency and video workstation, nonlinear editing system, audio frequency and video input equipment and picture input equipment, high resolution display;
Dress audio-video collection card in the audio frequency and video workstation; Audio frequency and video input equipment and picture input equipment connect the input end of audio frequency and video workstation, and nonlinear editing system is connected by network with the audio frequency and video workstation, and high resolution display connects the output terminal of audio frequency and video workstation;
It is that browser/server+C/S is that the architecture that client/server combines is a hybrid architecture that described audio-video information resource storehouse system adopts B/S; The data management pattern adopts the data management pattern of layer distributed, promptly utilizes presentation layer/functional layer/data Layer/various requests of information service layer four-layer structure parallel processing; Multifunction module is effectively distributed physically, and using two above servers for information service layer especially is video server and audio frequency and picture servers distributed storage video, audio frequency and picture resource; The transmission of audio frequency and video, broadcast format adopt stream media technology;
The hardware configuration in audio-video information resource storehouse is as follows: it includes host exchange, switch, Web server, database server, video server, audio frequency and picture servers, system management machine; Above-mentioned four servers are connected with wide area network by host exchange, and the system management machine is connected with host exchange by switch; Information server is that video server, audio frequency and picture servers are equipped with disc array system and magnetic tape station respectively;
User's application system comprises that the user browses subsystem, user inquiring subsystem and user and uploads subsystem;
Management system is made up of user management subsystem and management of information resources subsystem two parts; Management of information resources subsystem is made up of local management subsystem and telemanagement subsystem.
2, digitalized audio-video information resource system for remote education according to claim 1 is characterized in that described audio frequency and video workstation adopts high-end PC; Described audio-video collection card adopts the WINNOV capture card; Described nonlinear editing system adopts the DPS system.
3, digitalized audio-video information resource system for remote education according to claim 2 is characterized in that the audio frequency and video input equipment is: video camera, video recorder, video disc player, audio-frequence player device, MIDI compositor, microphone; The picture input equipment is: image reading apparatus, Digital camera.
4, digitalized audio-video information resource system for remote education according to claim 1 is characterized in that user's application system is to utilize acoustic image resource remote browse, retrieval and the management system of dynamic web page technique, Web database technology, distributed data base technique and relevant com component technological development.
5, a kind of implementation method of long-distance education digitalized audio-video resource information system is characterized in that it is made up of information collection system, audio-video information resource storehouse system, user's application system, management system; The architecture of described audio-video information resource storehouse system is: the B/S+C/S hybrid architecture; Its tool implementation method is the several different methods that adopts stream media technology to combine with database technology at server end, the system transaction processing logic is put in server end, thereby given full play to the power of server, use Web and Streaming Media mode that the audio and video information service is provided, system user only need adopt the Web browser and the media player of default installation in the operating system, can realize the visit of long-range audio-video information resource by TCP/IP and corresponding stream media protocol; Simultaneously,, make the system manager on arbitrary REMOTE MACHINE, in time finish the part management function, be convenient in time find and deal with problems fast by the management function that the Web mode provides; Need safety, flexible, characteristics of high efficiency at system management, developed system manager's program, at the leading subscriber end this program is installed, and cooperates the corresponding service routine of server end, finish the configuration effort of rapid batch management, systemic-function and the environment of audio and video information and system user;
The data management pattern of audio-video information resource storehouse system adopts the data management pattern of layer distributed: its concrete grammar is: aspect system logic, on the basis of traditional presentation layer/functional layer/data Layer three-decker, add an information service layer, the body matter of audio and video information is stored with document form, is the supplementary of audio and video information that index, key frame, brief introduction, key word, path content deposit database in, adds the audio and video information push module simultaneously; Like this, after system user sends request by presentation layer, carry out browsing data by functional layer, search function is handled, and be connected with database by carrying out corresponding extension application, to database server the data processing application is proposed by the SQL mode, data Layer is carried out data process method, accept the request of Web server to data base manipulation, realization is to the data library inquiry, revise, update functions, operation result is submitted to functional layer, functional layer is play with the streaming of obtaining audio and video information according to data Layer operation result guiding user access information service layer, download service;
On system architecture, each functional module is effectively distributed physically, be that the main body of audio-video information resource is carried out the high scalability physical distribution to information service layer especially: its way is physical distribution Web server, database server, video server, audio frequency and picture servers, also can further expand as required or shrink simultaneously, to adapt to different demands.
6, the implementation method of digitalized audio-video information resource system for remote education according to claim 5, it is characterized in that described information collection system by following mode with the external source audio and video information warehouse-in of gathering and editing: various separate sources, the external source audio and video information of different-format is connected with system by the various distinct interfaces that the information collection system provides, if simulating signal, after then need carrying out corresponding A/D conversion formation high quality digital signal through the information acquisition subsystem, add in information editing's subsystem, if the source is digital signal, then directly add in information editing's subsystem, information editing's subsystem is mainly carried out Edition Contains to the digitizing audio and video information, picture color is adjusted, denoising, smooth operation, its output is then according to the form difference of audio-video information resource, can optionally convert thereof into and be adapted at the wide area online browsing by the information resources format converting module, transmission and the audio-video information resource form that shows, the keeper examines the audio frequency and video and the picture file that generate, if its content, the form of expression or the requirement of non-conformity of quality assembly system, the editor's subsystem that then sends a message back remodifies editor, satisfactoryly then resource is added in the system of audio-video information resource storehouse by system supervisor, system supervisor is finished the resource storage administration automatically, data link work, also resource is backed up simultaneously, status checking and examination, if pinpoint the problems, supervisory routine is reported to the police automatically, for content, the form of expression or non-conformity of quality assembly system require information resources, and the editor's subsystem that then sends a message back remodifies editor.
7, the implementation method of digitalized audio-video information resource system for remote education according to claim 5 is characterized in that described management system is divided into user management subsystem and management of information resources subsystem; Be used for managing " system " all users and information resources; The user management subsystem is mainly used in classification and don't bother about the reason different user, by suitable authority restriction, guarantees that the user uses, the acoustic image resource of management different stage; Management of information resources subsystem can fast browsing, change, deletion information resources; Except the general deletion information resources of information resources, modification information resources key word function, because audio-video information resource kind difference, the corresponding contents of the management of information resources is also different; Being primarily aimed at its program title, production unit, creator and featured performer for video information resources safeguards; For the audio-frequency information resource, be primarily aimed at its title, singer or player or speaker, write words or wrirte music and safeguard; For the pictorial information resource, be primarily aimed at its title, content description is safeguarded; Management of information resources subsystem is divided into local management subsystem and telemanagement subsystem, the local management subsystem is a system supervisor based on the C/S structure, be mainly used to realize that the information resources storage organization is management, the maintenance of genealogical classification directory tree, information resources are added fast in batches, are revised and deletion, make the keeper can manage native system efficiently and safely; Administrator program is to use the C/S structure to realize, the C/S structure realizes user interface and information management function with client application, system user can be uploaded corresponding file, the telemanagement subsystem has the function of management file upload simultaneously, make keeper's leading subscriber file upload efficiently, in time browse file, the unwanted file of deletion system that the user uploads, revise inappropriate descriptor, ensure that legitimate files enters browsing database rapidly, convenient all users use.
8, the implementation method of digitalized audio-video information resource system for remote education according to claim 5, it is characterized in that described user's application system carries out respective remote according to user right and browse, the inquiry and on, the download message resource, it is to utilize dynamic web page technique, the Web database technology, the acoustic image resource remote browse of distributed data base technique and relevant com component technological development, searching system, it comprises that the user browses subsystem, user inquiring subsystem and user upload subsystem, the major function that the user browses subsystem is to use the family to locate fast according to the information resources classification, find the information resources that oneself need rapidly, mainly contain two key work, the one, browse the quick demonstration of directory tree, be convenient to safeguard; The 2nd, information resources show fast, content is detailed; The inquiry of audio-video information resource system is different because of the difference of audio-video information resource, and for video information resources, its inquiry mainly contains program title, production unit, creator, featured performer and descriptor aspect; For the audio-frequency information resource, its inquiry mainly contains title, author, player or singer or speaker and keyword aspect, and for the pictorial information resource, its inquiry mainly contains title, key word, content description, file type and entry time aspect; Simultaneously, the user inquiring subsystem also has the multiple inquiry form of " compound query " and " inquiring about " in the result; Because the singularity of audio-video information resource, to the content of resource table in the audio-video information resource database except comprising above common description field, also add " key word " field, it mainly is to be used for audio-video information resource is further described, to determine the content of its performance, make things convenient for user inquiring; User's file upload is the sign of open system, after the interpolation telemanagement file upload module, has made things convenient for keeper's telemanagement.
9, the implementation method of digitalized audio-video information resource system for remote education according to claim 5 is characterized in that it also comprises the security of system design:
(1) shielding resource path assembly
It belongs to the server side functionality module, it is a kind of method of effective shielding harness unauthorized access, it is when the user capture audio and video information, after shielding resource path assembly obtains user's request, at first open this audio-video information resource, and then issue the user, avoid exposing the information resources store path to the user;
(2) Web server filtrator
It belongs to the Web server plug-in unit, and its major function is by the request of interception user to Web server, if discovery user request is audio-video information resource, will verify user's identity, with the shielding illegal request.
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