CN1261700A - Digital interactive language laborating system - Google Patents

Abstract

Digital interactive language laboratory system consists of server system, student's computers and communication lines connecting the server system and the student's computers. The server has installed multimedia data base with compressed interactive data and provided high-performance adapter and operates corresponding serving and managing softwares; the student's computers adopt cheap special integrated circuit, and the communication lines are 485 two-way bus. The language laboratory system is used for interactive language study.

Description

Digital interactive language laborating system

The invention belongs to the multimedia education equipment technical field, is a kind of language laborating system of realizing the multi-user interactive audition by computer server and multi-medium data compression coding and decoding circuit.Can be used for building the interactive language laboratory of universities, middle and primary schools.

At present, the method for language laboratory is adopted in large, medium and small with good conditionsi in the foreign language Teaching Listening Comprehension.School builds several language laboratories, and last class hour plays tape by the teacher and imparts knowledge to students.Because cost is high, difficult in maintenance, the voice classroom of school of every institute, limited amount has caused the situation of phonetic teaching resource anxiety, even in university, each class also can only arrange the hearing class one week 1～2 time, makes student's Listening Training wretched insufficiency.

In addition, traditional phonetic teaching is with the storage medium of tape as the voice data.Tape is stored in a sequential manner, can't locate fast.In field research, classroom and student have to rewinding repeatedly, come in to play the content of needs soon, wasted valuable time virtually.In addition, during student oneself exercise hearing, because everyone every class all needs magnetic tape reel, a large amount of tapes is had to prepare in the voice classroom, has brought very big difficulty to maintenance.More seriously, the intrinsic problem of aging of tape needs huge update cost.And along with the decline of tape tonequality, student's results of learning are also undesirable.

Along with multimedia computer application and development and universal, people more and more clearly recognize the good result of interacting language learning, the courseware that a large amount of computer-aided instructions occurred, but because these coursewares need certain hardware environment, and present most schools and individual all expensive expenses of financial insolvency computer teaching still are difficult to popularization and application.

These factors have formed at present a lot of enough language laboratories of the unable construction of poverty-stricken area school, and the language laboratory that has built up in a large number but can't satisfy the unreasonable situation of student's requirement simultaneously.

In sum, change existing language laboratory situation, improve the quality of teaching, extremely urgent.

The object of the present invention is to provide a kind of with low costly, safeguard and easy to use, and can reach the language laborating system that is easy to popularize of the results of learning of the interactive multimedia courseware that on multimedia computer, moves.

The present invention is based on the advantage of advanced computers teaching, the compressed multimedia database that will have interactive information is installed on the server, cooperate high performance adapter, corresponding service of operation and management software constitute the advanced interactive language laboratory service system of a cover.Every station server is connected with many student's machines by signal line, receive the instruction that the user sends by keyboard, after user's requirement handled, from database, access voice data through overcompression, by independently hardware decoder decoding, restore sound signal, be aided with some characters and graphical information, give the student by the playback of student's machine, realize the interactive language exercise.Student's machine adopts cheap special IC, has abandoned traditional mechanical type blattnerphone, has significantly reduced the cost of total system, has improved serviceable life and reliability, is fit to promote the use of to various areas.

The digital interactive language laborating system that the present invention proposes is made up of the communication line of server system, a plurality of student terminal unit and Connection Service device system and student's machine, shown in figure one.

Server system is made up of computing machine, adapter and controller.Computing machine is used to store data and runs administrative software.Computing machine is connected with controller by the adapter that is inserted on the mainboard.For improving the performance of system, adapter uses pci bus interface.Controller links to each other with a plurality of student's machines by cable.Controller adopts the board plug type structural design, can expand corresponding plate according to student's machine quantity of reality.Every controller can be plugged into and be reached 64 user terminals.The conventional equipment that the while controller also provides sound-track engraving apparatus, microphone, loudspeaker, mixer, calling set etc. to be used to impart knowledge to students.

The function of server system is:

1. store the interactive multimedia database.

2. communicate by letter with student's machine by adapter, accept user's instruction, handle the back and submit sound to student's machine

Multi-media signals such as frequency and image are finished interactive operation.

3. the system management maintenance interface is provided.

4. interactive mode teaching control interface is provided.

Student's machine is made of single-chip microcomputer, bi-directional communication interface circuit, audio frequency imput output circuit, mixer, lattice type LCD graphic alphanumeric display and keyboard etc., shown in figure four.User terminal is accepted user's operation by keyboard, is uploaded to server, and the sound signal and the pictograph data that pass down of reception server are given the user by earphone and display screen playback respectively after decoding simultaneously.Last class hour, the student can also finish many people dialogue function by microphone on student's machine and control desk cooperation.

Because sound signal has very big quantity of information (stereophonic signal of the CD Quality of uncompressed can reach 1.4Mbps), if do not carry out the active data compression, be that the memory space or the data throughput capabilities of computing machine all is difficult to satisfy multi-user's requirement of audition simultaneously.So compressed format is all used in the storage of native system sound intermediate frequency data and transmission.With widely used MPEG1-LAYER3 (MP3) form is example, and data compression rate can reach 12: 1, and the data transfer rate of the stereophonic signal of play CD tonequality also only has 96Kbps.Simultaneously, adopted independently hardware audio demoder of each user.Requirement to server system also reduces greatly, makes a plurality of student's machines of computing machine band become possibility, greatly reduces cost, is easy to popularize.The hardware audio demoder can use dsp chip to realize, also can adopt special-purpose MP3 decoding device to realize, as the STA013 decoding chip etc.The audio decoder circuit of employing STA013 as shown in Figure 5.

The data of server system and student's machine are connected the scheme that adopts 485 two-way differential bus.According to user's different needs, it is interior to improve tonequality that audio decoder can be installed in student's machine, also can be installed in the controller to reduce the digital telecommunication circuit cost.Also have the up-downgoing analog line in the stube cable simultaneously, be used for the transportation simulator sound signal.

System principle as shown in Figure 2.Controller is communicated by letter with the student terminal machine, receives user's request, is uploaded to server process by adapter.After the good user of the server process request, the audio compressed data that will access from database is passed to controller by under the adapter, and the audio decoder decode of being responsible for distributing to the counterpart terminal machine by controller goes out simulated audio signal.Sound signal is given the user through mixer and amplifier processing back by the terminating machine playback.Simultaneously, corresponding figure and text prompt information are also shown by terminating machine by digital communication.The audio frequency switching matrix is used for realizing many people dialogue function.

The server software system as shown in Figure 3.Media data library storage multimedia teaching information, customer data base are safeguarded the record that all use the user of native system, and working data base is safeguarded the situation of total system work.Management software provides the interface of System Administrator Management native system.Interactive teaching software assistance teacher finishes calling, functions such as dialogue on class.Service-Engine is used for finishing functions such as operation between server and the terminal, input and output.Device driver provides the interface between software systems and the hardware.

When building a plurality of language laboratory at the same time,, the server of a plurality of systems can be linked together, realize data sharing and centralized management by computer network.Utilize network server, user even can realize distance learning by internet and PC.

Owing to adopted advanced digital processing technology, native system to overcome the conventional language laboratory equipment lower tone that uses blattnerphone fully, used inconvenience, maintenance update difficulty, shortcoming of a high price.Simultaneously, also have the following advantages:

1. can realize the interactive language exercise, be easy to learn and use that effect is remarkable.Owing to need not computing machine behaviour

Do the basis, the student can concentrate one's energy to learn a language, even can obtain than multimedia computer more

Good language learning effect.

2. use native system, the teacher not only can finish all functions that legacy equipment is given a lesson, more can by

Computing machine is finished automatic quiz function, and can add up easily and inquire about becoming of each student

Achievement.

3. capacity is big, and server with common 10G hard disk can store that to be equivalent to 1000 dishes normal

With 45 minutes tapes.

4. learning stuff upgrades convenient and swift.The staff does not again need a large amount of re-recording bands, only

The software that needs to provide with system gets final product input computer of original tape.Use special for handing over

The mutual courseware CD made of formula language teaching can be installed to the interactive language exercise easily and is

In the system.

5. be easy to management.Each student's of system maintenance data.By password authentification, system can be automatic

Manage the time that each student uses, progress, achievement etc.

6. with low cost, safeguard simple.Owing to thoroughly abandoned conventional tape drives, greatly reduced construction

Cost and maintenance cost.Do not need a lot of keepers, saved human resources and taken.Be fit to promote

Popularize.

Compare with the multi-media classroom that is made of personal computer and LAN (Local Area Network) fully, the cost in a classroom of native system equipment only is 1/tens of a multi-media classroom, and working environment is not had harsh requirement.Power consumption also only is 1/tens of multi-media classroom.Need not the computer maintainer of specialty.And on the interactive language practice effect, can near in addition surpass the effect of multi-media classroom.And the student can concentrate one's energy on aural learning, learns the computer basic operation and need not spend the plenty of time earlier.

Grasp the basic demand that above foreign language has been modern education.And the foreign language teaching ability of China can not meet the demands far away.The construction cost of native system and maintenance cost only are 1/tens of multi-media classroom, even also lower than traditional magnetic tape system, and the effect of interactive exercise can match in excellence or beauty with computer system, are fit to very much penetration and promotion.The people of contacted computer simultaneously, also reduced requirement, even can not use easily yet to the user.

Accompanying drawing 1 is system layout figure, the layout of descriptive language laboratory system.

Accompanying drawing 2 is a systematic schematic diagram, the signal flow of descriptive system.

Accompanying drawing 3 is the server software schematic diagram, describes the composition of the software that moves on the server.

Accompanying drawing 4 is the circuit diagram of student's machine, comprise single-chip microcomputer, communication interface circuit, display driver circuit,

Keyboard and interface circuit.

Accompanying drawing 5 is the circuit diagram of audio decoder.

Claims (6)

1. digital interactive language laborating system, by server system, a plurality of student's machines, the communication line of Connection Service device system and student's machine is formed, it is characterized in that server is by the computing machine that is used to store multimedia interactive teaching data and runs administrative software, adapter and controller constitute, computing machine is connected with controller by the adapter that is inserted on the mainboard, server system connects a plurality of student terminal machines by circuit, accept the operational order that the student sends by the student terminal machine, behind the operation teaching database with audio frequency, figure and lteral data offer the student terminal machine.

2. digital interactive language laborating system according to claim 1 is characterized in that voice data handles through overcompression, thereby the storage of magnanimity voice data and transmission are realized with lower hardware costs.

3. digital interactive language laborating system according to claim 2 is characterized in that each terminating machine all uses independently hardware audio demoder, has reduced the requirement to server.

4. digital interactive language laborating system according to claim 1 is characterized in that the student terminal machine is made of single-chip microcomputer, bi-directional communication interface circuit, audio frequency imput output circuit, mixer, LCD graphic alphanumeric display and keyboard.

5. digital interactive language laborating system according to claim 1 is characterized in that having the audio frequency switching matrix in the controller, cooperates microphone and control corresponding software in student's machine, can realize many people dialogue function.

6. digital interactive language laborating system according to claim 5 is characterized in that containing in the controller conventional teaching equipment such as recording playback machine, microphone, mixer, calling set.

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