CN100369406C - Intelligentized multimedia language learning system - Google Patents
Intelligentized multimedia language learning system Download PDFInfo
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- CN100369406C CN100369406C CNB2004100376482A CN200410037648A CN100369406C CN 100369406 C CN100369406 C CN 100369406C CN B2004100376482 A CNB2004100376482 A CN B2004100376482A CN 200410037648 A CN200410037648 A CN 200410037648A CN 100369406 C CN100369406 C CN 100369406C
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Abstract
The present invention relates to an intellectualized multimedia language learning system based on a full network synchronous digital communication technique, which is composed of a teacher machine, a voice communication card, a full network synchronous communication system and student terminals. The teacher machine finishes the connection with campus area networks (CAN), the Internet and other media and stores courseware and learn information for the request programs of students or the use of teachers; the voice communication card is used as a bridge between the teacher machine and the synchronous communication system and finishes the functions of receiving, encapsulating and transferring data and instructions uploaded by the synchronous communication system and transferring data and instructions downloaded by the teacher machine to the synchronous communication system; under a network synchronous clock, the full network synchronous communication system transfers the data and the instructions downloaded by the teacher machine to the student terminals and transfers data and instructions uploaded by the student terminals to the voice communication card; the student terminals finishes the functions of receiving the data and the instructions downloaded by the synchronous communication system, presenting medium data to students and collecting uploaded voice data and instructions. The system has the advantages of reliability, stability and extensibility.
Description
Technical field
The present invention relates to a kind of intelligent multi-media langue leaning system based on the whole network synchronous digital communications technology.
Background technology
Traditional analog voice system is owing to adopt the analogue audio frequency transmission technology, on system configuration, used a large amount of analog electronics, the voice transfer loss is big, circuit noise is big, poor anti jamming capability, and the complex structure of system, equipment damage easily, function is simple, very flexible, and available resource is less relatively.The digital network langue leaning system that existing market exists, great majority adopt ICP/IP protocol to construct the exchange of speech network, but because ICP/IP protocol is in the inherent shortcoming of Voice ﹠ Video data transmission, be difficult to guarantee the real-time Transmission and the transmission quality of Voice ﹠ Video data, there are voice latency, shake and fracture inevitably, add that the student terminal of this series products mostly is PC greatly, have cost higher, complicated operation, the not shortcoming of easy care.
Summary of the invention
The present invention is based on that problem that above language learning system exists proposes, and its objective is the novel intelligent langue leaning system that a kind of simple to operate, perfect in shape and function, voice smoothness are provided.
This intelligent language learning system is made up of teacher computer, voice communication card, the whole network synchronous communication system and student terminal and systems soft ware.Adopt the whole network synchronous data transmission mode, digital form is all adopted in the transmission of voice messaging, storage, and the up-downgoing of all data, shunt all are to operate in order by unified clock with multiple connection, has thoroughly solved the problem of circuit interference and voice time-delay and fracture.Teacher computer is finished and being connected of campus network, Internet and other medium, and store a large amount of coursewares, the multimedia learning data is used for student's program request or teachers' instruction; The voice communication card as the bridge of teacher computer and the whole network synchronous communication system finish to communication system upload data and instruction reception and again the encapsulation pass to teacher computer and communication system functionality passed in data and instruction that teacher computer issues; The whole network synchronous transmission system is made up of secondary tap and multiple connection module and synchronization control module, employing is that core circuit is realized with the FPGA large scale integrated circuit, passes to the voice communication card after data under under the unified network synchronous clock voice communication card being transmitted and instruction send corresponding student terminal and the data that student terminal is uploaded and instruction multiple connection accurately along separate routes to; Student terminal is to adopt the high-speed microprocessor control technology, link to each other with the voice communication card by the whole network synchronous transmission system with private network cable, finish the data and the instruction that pass under the received communication system, show student and collection to upload the function of student's speech data and instruction various media datas.Software systems are responsible for realizing the Based Intelligent Control of every language teaching functions such as classroom instruction, autonomous learning, electronics examination hall, system management and accounting management, focus on solving the problem of aspects such as mass data transmission between voice communication card and computer, student terminal machine, storage, management.
According to above-mentioned thought, the invention provides a kind of intelligent multi-media langue leaning system, comprising:
A teacher computer is by bus connecting bus controller and shared buffer memory device;
A voice communication card comprises:
A described bus control unit carries out bus driver and address decoding, behind the address decoding gating, through bus driver data and command signal is passed to the shared buffer memory device;
A described shared buffer memory device, under the control of bus control unit, order is read in and is controlled and reads data and the instruction of teacher computer via data/address bus input, and order is read in and controlled and reads data and the instruction of sending into via the exchange of speech unit from each student terminal;
A described exchange of speech unit, teacher computer is closed the road multiple connection via each circuit-switched data signal that the shared buffer memory device passes down, pass down then, and select each circuit-switched data that student terminal is uploaded to read according to the instruction of teacher computer, be uploaded to teacher computer through the shared buffer memory device, and produce the network synchronous clock of whole system, pass down, so that realize that the whole network is synchronous via the special clock circuit;
The whole network synchronous transmission system carries out tap to the following biography multiple connection data from the language switching card, sends into each student terminal then respectively, and the data of uploading from each student terminal are carried out multiple connection, sends into the voice communication card then; With
A plurality of student terminals.
Described exchange of speech unit comprises:
A synchronised clock generation module, the network synchronous clock of generation whole system passes down via clock line;
A multicenter voice receiver module receives each student terminal and uploads each circuit-switched data via the whole network synchronous communication transmission system;
Go here and there and modular converter for one, the serial data that the multicenter voice receiver module is sent into converts parallel data to, sends into the passage control module then;
A passage control module is according to the dedicated tunnel in each student terminal passage of instruction gating of teacher computer;
A data module for reading and writing writes described shared buffer memory device according to the instruction of teacher computer with the data of uploading in the dedicated tunnel, and will call over from the downlink data of shared buffer memory device, forms the data flow of a plurality of passages that close the road multiple connection;
A multicenter voice sending module sends the data flow of each passage of biography down.
Described exchange of speech unit also comprises:
A multichannel command reception module is used to receive the director data that each student terminal is uploaded; And
A multichannel instruction sending module, be used to send reach under the teacher computer each student terminal director data.
Described the whole network synchronous communication transmission system comprises:
First order crosspoint comprises a plurality of first order voice taps/multiple connection module;
Second level crosspoint comprises a plurality of second level voice tap/multiple connection module;
Wherein each first order voice tap/multiple connection module connects two the voice tap/multiple connection modules in two second level respectively through data wire, the multiplexed voice data that will pass from a road time of voice communication card is switched to two second level tap/multiple connection modules, and multiple connection is from the speech data of uploading of two second level voice tap/multiple connection modules;
Wherein each second level voice tap/multiple connection module connects a plurality of student terminals respectively through data wire, be tapped into corresponding student terminal respectively with passing multiplexed voice data down, and multiple connection is from the speech data of uploading of each student terminal.
Described the whole network synchronous communication transmission system also comprises:
Be arranged in a plurality of first order instruction tap/multiple connection modules of first order crosspoint and be arranged in a plurality of second level instruction of second level crosspoint tap multiple connection module;
Wherein each first order instruction tap/multiple connection module connects 4 described second level instruction tap/multiple connection modules respectively through data wire, to descend multiplex instruction data tapping to two a described second level instruction tap/multiple connection module of biography from the voice communication card, and multiple connection is from the director data of uploading of described two second level instruction tap/multiple connection module.
Described tap and multiple connection are time-division tap and multiple connection.
Described tap and multiple connection can also be that code division connects and multiple connection.
Described exchange of speech unit is the field programmable gate array circuit.
Described teacher computer is a personal computer, is used for editor and storing audio medium courseware, control audio media play flow process, and management and control teaching to the student.
Described bus is a pci bus, and described bus control unit is a pci bus controller.
Owing to adopted above technical scheme, native system to have remarkable advantages such as system stability, voice smoothness, function advanced person, cost be lower, simple to operate, easy to maintenance, brought the brand-new experience of language learning.
The present invention is described in detail with instantiation below in conjunction with accompanying drawing.
Description of drawings
Fig. 1 is a configuration schematic diagram of the present invention;
Fig. 2 .a, Fig. 2 .b are voice communication card structure figure of the present invention;
Fig. 3 is the whole network synchronous transmission system structure chart of the present invention;
Fig. 4 is a student terminal structure chart of the present invention;
Embodiment
Referring to Fig. 1 and Fig. 2 a, intelligent multi-media langue leaning system provided by the present invention comprises:
A teacher computer is by bus connecting bus controller and shared buffer memory device;
A voice communication card comprises:
A bus control unit carries out bus driver and address decoding, behind the address decoding gating, through bus driver data and command signal is passed to the shared buffer memory device;
A shared buffer memory device, under the control of bus control unit, order is read in and is controlled and reads data and the instruction of teacher computer via data/address bus input, and order is read in and controlled and reads data and the instruction of sending into via the exchange of speech unit from each student terminal;
An exchange of speech unit, teacher computer is closed the road multiple connection via each circuit-switched data signal that the shared buffer memory device passes down, pass down then, and select each circuit-switched data that student terminal is uploaded to read according to the instruction of teacher computer, be uploaded to teacher computer through the shared buffer memory device, and produce the network synchronous clock of whole system, pass down, so that realize that the whole network is synchronous via the special clock circuit;
The whole network synchronous transmission system carries out tap to the following biography multiple connection data from the language switching card, sends into each student terminal then respectively, and the data of uploading from each student terminal are carried out multiple connection, sends into the voice communication card then; With
A plurality of student terminals.
Be described in detail below.
(1) teacher computer
Teacher computer is a personal computer, mainly finishes editor and storage to the audio frequency media courseware, the control of audio frequency media playing flow, and to student's teaching management and control.The function of teacher computer mainly is to be finished by systems soft ware.
(2) voice communication card
The voice communication card comprises: a bus control unit, carry out bus driver and address decoding, and behind the address decoding gating, data and command signal are passed to the shared buffer memory device through bus driver; A shared buffer memory device, under the control of bus control unit, order is read in and is controlled and reads data and the instruction of teacher computer via data/address bus input, and order is read in and controlled and reads data and the instruction of sending into via the exchange of speech unit from each student terminal; An exchange of speech unit, teacher computer is closed the road multiple connection via each circuit-switched data signal that the shared buffer memory device passes down, pass down then, and select each circuit-switched data that student terminal is uploaded to read according to the instruction of teacher computer, be uploaded to teacher computer through the shared buffer memory device, and produce the network synchronous clock of whole system, pass down, so that realize that the whole network is synchronous via the special clock circuit.
The operation principle of voice communication card is shown in Fig. 2 .a, and the structure of voice communication card comprises pci bus controller, shared buffer memory, large scale integrated circuit FPGA, ad/da converter, differential driving I/O and clock source etc.Pci bus controller is finished the function of bus driver and address decoding, data and command signal is passed to bus driver, and behind the address decoding gating, be sent to shared buffer memory; The teacher computer drive software by bus driver, address decoding, from shared buffer memory sense data, pass to application software and carry out function treatment.Shared buffer memory is read in control by order and is read each road voice and instruction data, has realized the exchange of each circuit-switched data or straight-through, and the audio mixing computing of voice is finished in systems soft ware; Ad/da converter is finished the input and output conversion of teacher computer headset; Differential driving I/O drives for transmission is provided between voice communication card and the whole network synchronous transmission system.The clock source provides standard time clock for exchange of speech unit F PGA work.The exchange of speech unit carries out tap, multiple connection and exchange processing to each circuit-switched data and teacher's data that the whole network synchronous transmission system transmits, and the network synchronous clock of generation whole system passes down.
Core in the voice communication card-exchange of speech unit F PGA function designs shown in Fig. 2 .b, comprising: a synchronised clock generation module, and the network synchronous clock of generation whole system passes down via clock line; A multicenter voice receiver module receives each student terminal and uploads each circuit-switched data via the whole network synchronous communication transmission system; Go here and there and modular converter for one, the serial data that the multicenter voice receiver module is sent into converts parallel data to, sends into the passage control module then; A passage control module is according to the dedicated tunnel in each student terminal passage of instruction gating of teacher computer; A data module for reading and writing writes described shared buffer memory device according to the instruction of teacher computer with the data of uploading in the dedicated tunnel, and will read from the downlink data of shared buffer memory device, forms the data flow of a plurality of passages that close the road multiple connection; A multicenter voice sending module sends the data flow of each passage of biography down; A multichannel command reception module is used to receive the director data that each student terminal is uploaded; A multichannel instruction sending module, be used to send reach under the teacher computer each student terminal director data.
Each the circuit-switched data signal (comprising voice and instruction) that is transmitted by the teacher computer system closes the road multiple connection in FPGA, and exchange on this basis, from shared buffer memory, read again, wherein one the tunnel after carrying out steering D/A conversion, exports ad/da converter the output after difference output drives of remainder data signal as the teacher; The data-signal of being uploaded by the whole network synchronous transmission system drives through the difference input, close the Lu Chengyi circuit-switched data after handling with teacher's speech of ad/da converter transmission again, through the FPGA serial transfer to parallel after, write in the shared buffer memory, teacher computer is at last by bus driver, address decoding, sense data from shared buffer memory.Data in the FPGA functional module are switched and the passage control module is finished string and conversion and exchange of speech function respectively, and module for reading and writing is subjected to the control of passage control module to finish the read-write of shared buffer memory and the transmitting-receiving of data.The network synchronous clock that the synchronised clock generation module produces whole system passes down, system is that each user (being student terminal) has distributed fixing information channel, all channels are taken their own roads under unified network synchronous clock, be independent of each other, all can independently operate, performance can not change because of number of users increases.By the passage expansion, this voice communication card can be handled the voice transfer and the exchange of 16 multiplex channels (i.e. 128 student terminals) simultaneously.
(3) the whole network synchronous transmission system
The whole network synchronous transmission system is made up of secondary tap and multiple connection module and synchronization control module, employing is that core circuit is realized with the FPGA large scale integrated circuit, passes to the voice communication card after data under the transmission and instruction send corresponding student terminal and the data that student terminal is uploaded and instruction multiple connection accurately along separate routes under the unified network synchronous clock teacher being blocked.
The operation principle of the whole network synchronous transmission system is as shown in Figure 3: the whole network synchronous communication transmission system comprises: first order crosspoint comprises a plurality of first order voice taps/multiple connection module (being positioned at Fig. 3 left side); Second level crosspoint comprises a plurality of second level voice tap/multiple connection module (being positioned at Fig. 3 right side); Wherein each first order voice tap/multiple connection module connects two the voice tap/multiple connection modules in two second level respectively through data wire, the multiplexed voice data that will pass from a road time of voice communication card is switched to two second level tap/multiple connection modules, and multiple connection is from the speech data of uploading of two second level voice tap/multiple connection modules; Wherein each second level voice tap/multiple connection module connects a plurality of student terminals respectively through data wire, be tapped into corresponding student terminal respectively with passing multiplexed voice data down, and multiple connection is from the speech data of uploading of each student terminal.
Stating the whole network synchronous communication transmission system also comprises: be arranged in a plurality of first order instruction tap/multiple connection modules of first order crosspoint and be arranged in a plurality of second level instruction of second level crosspoint tap multiple connection module;
Wherein each first order instruction tap/multiple connection module connects 4 described second level instruction tap/multiple connection modules respectively through data wire, to descend multiplex instruction data tapping to two a described second level tap/multiple connection module of biography from the voice communication card, and multiple connection is from the director data of uploading of described two second level instruction tap/multiple connection module.
Teacher computer is passed to the voice communication card with digital voice file, the voice communication card with each circuit-switched data multiple connection after, be tapped into the student terminal machine through I and II, independently 64 circuit-switched data transmission channels are provided, and the data that all student terminal machines send are uploaded to the voice communication card with opposite direction I and II multiple connection.10 road uplink and downlink data wires are arranged between the I and II Switching Module, every data rate is 5.6Mbps, the A/B road of multiple connection of preceding 8 difference and tap secondary Switching Module, the C/D road, the E/F road, G/H road speech data, the 9/10th is communication control data stream and video VGA signal flow uplink and downlink signals.Each secondary Switching Module is realized respectively 8 student terminal data and instruction path are carried out multiple connection and tap; The whole network synchronous transmission system from the data (comprising voice and character display information) of upper teacher computer, enters the FPGA of one-level Switching Module by driving interface and voice communication card connection after reverse drive.Each FPGA will receive, produce and transmit a series of synchronization pulses, be sent to other modules and student terminal respectively, and student terminal A/D is provided, the 22KHZ synchronised clock of D/A change-over circuit.
(4) student terminal machine
The student terminal hardware system mainly partly is made up of single-chip microcomputer, VGA demonstration control, voice A/D and D/A, simulation amplification, differential drive circuit etc.Its theory diagram as shown in Figure 4.The MIC analog voice input signal of student terminal machine is delivered to voice A/D collecting part after amplifying, voice A/D is converted to digital signal is sent into the net synchronous transmission system through differential drive circuit dedicated tunnel with voice signal under the control of system's network synchronous clock.When serving as a teacher machine sowing and putting voice, voice signal is handled through the net synchronous transmission system and is become code stream outputs to appointment student terminal passage through differential drive circuit voice D/A circuit, voice A/D is under the control of system's network synchronous clock, with the digital speech code stream become analog voice behind amplifier from earphone output, make the student can the content of courses of uppick real-time voice.
Single-chip microcomputer passes through the literal code information of teletype command passage reception teacher computer transmission down, and the lattice information that accesses corresponding literal according to literal code information from Chinese character base is delivered to display control circuit.Display control circuit carries out lattice information processing such as parallel/serial conversion, simulation amplification, generates the standard rgb signal, outputs to external VGA display display text information again.
Single-chip microcomputer passes through the command information of teletype command passage reception teacher computer transmission down, enters calling of each function program according to instruction, and the user sends to the whole network synchronous communication system by the instruction of keyboard input through uploading instruction path.
Claims (10)
1. intelligent multi-media langue leaning system comprises:
A teacher computer is by bus connecting bus controller and shared buffer memory device;
A voice communication card comprises:
A described bus control unit carries out bus driver and address decoding, behind the address decoding gating, through bus driver data and command signal is passed to the shared buffer memory device;
A described shared buffer memory device, under the control of bus control unit, order is read in and is controlled and reads data and the instruction of teacher computer via data/address bus input, and order is read in and controlled and reads data and the instruction of sending into via the exchange of speech unit from each student terminal; With
A described exchange of speech unit, teacher computer is closed the road multiple connection via each circuit-switched data signal that the shared buffer memory device passes down, pass down then, and select each circuit-switched data that student terminal is uploaded to read according to the instruction of teacher computer, be uploaded to teacher computer through the shared buffer memory device, and produce the network synchronous clock of whole system, pass down, so that realize that the whole network is synchronous via the special clock circuit;
The whole network synchronous transmission system carries out tap to the following biography multiple connection data from the voice communication card, sends into each student terminal then respectively, and the data of uploading from each student terminal are carried out multiple connection, sends into the voice communication card then; And
A plurality of student terminals.
2. langue leaning system according to claim 1, wherein said exchange of speech unit comprises:
A synchronised clock generation module, the network synchronous clock of generation whole system passes down via clock line;
A multicenter voice receiver module receives each student terminal and uploads each circuit-switched data via the whole network synchronous communication transmission system;
Go here and there and modular converter for one, the serial data that the multicenter voice receiver module is sent into converts parallel data to, sends into the passage control module then;
A passage control module is according to the dedicated tunnel in each student terminal passage of instruction gating of teacher computer;
A data module for reading and writing writes described shared buffer memory device according to the instruction of teacher computer with the data of uploading in the dedicated tunnel, and will call over from the downlink data of shared buffer memory device, forms the data flow of a plurality of passages that close the road multiple connection;
A multicenter voice sending module sends the data flow of each passage of biography down.
3. langue leaning system according to claim 2, wherein said exchange of speech unit also comprises:
A multichannel command reception module is used to receive the director data that each student terminal is uploaded; And
A multichannel instruction sending module, be used to send reach under the teacher computer each student terminal director data.
4. langue leaning system according to claim 1, wherein said the whole network synchronous communication transmission system comprises:
First order crosspoint comprises a plurality of first order voice taps/multiple connection module;
Second level crosspoint comprises a plurality of second level voice tap/multiple connection module;
Wherein each first order voice tap/multiple connection module connects two the voice tap/multiple connection modules in two second level respectively through data wire, the multiplexed voice data that will pass from a road time of voice communication card is switched to two second level tap/multiple connection modules, and multiple connection is from the speech data of uploading of two second level voice tap/multiple connection modules;
Wherein each second level voice tap/multiple connection module connects a plurality of student terminals respectively through data wire, be tapped into corresponding student terminal respectively with passing multiplexed voice data down, and multiple connection is from the speech data of uploading of each student terminal.
5. langue leaning system according to claim 4, wherein said the whole network synchronous communication transmission system also comprises:
Be arranged in a plurality of first order instruction tap/multiple connection modules of first order crosspoint and be arranged in a plurality of second level instruction of second level crosspoint tap multiple connection module;
Wherein each first order instruction tap/multiple connection module connects 4 described second level instruction tap/multiple connection modules respectively through data wire, to descend multiplex instruction data tapping to two a described second level instruction tap/multiple connection module of biography from the voice communication card, and multiple connection is from the director data of uploading of described two second level instruction tap/multiple connection module.
6. according to the described langue leaning system of claim 1-5, wherein said tap and multiple connection are time-division tap and multiple connection.
7. according to the described langue leaning system of claim 1-5, wherein said tap and multiple connection are that code division connects and multiple connection.
8. according to the described langue leaning system of claim 1-5, wherein said exchange of speech unit is the field programmable gate array circuit.
9. according to the described langue leaning system of claim 1-5, wherein said teacher computer is a personal computer, is used for editor and storing audio medium courseware, control audio media play flow process, and management and control teaching to the student.
10. according to the described langue leaning system of claim 1-5, wherein said bus is a pci bus, and described bus control unit is a pci bus controller.
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| CNB2004100376482A CN100369406C (en) | 2004-04-28 | 2004-04-28 | Intelligentized multimedia language learning system |
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| CN102289974A (en) * | 2011-08-17 | 2011-12-21 | 中南民族大学 | Novel microcomputer interface experimental platform based on PCI and FPGA |
| CN107846399B (en) * | 2017-10-19 | 2021-08-10 | 西安万像电子科技有限公司 | Method for distributing and receiving multimedia content and system for processing multimedia content |
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| WO1994027234A1 (en) * | 1993-05-10 | 1994-11-24 | Taligent, Inc. | Multimedia synchronization system |
| JPH09222848A (en) * | 1995-12-12 | 1997-08-26 | N T T Data Tsushin Kk | Remote lecture system and network system |
| CN1336598A (en) * | 2001-09-07 | 2002-02-20 | 清华大学 | Quasi-synchronous master-slave remote education information management system and its implementation method |
| CN1400541A (en) * | 2002-08-20 | 2003-03-05 | 西安交通大学 | Multimedia real-time lessons-giving system based on IP web |
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2004
- 2004-04-28 CN CNB2004100376482A patent/CN100369406C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994027234A1 (en) * | 1993-05-10 | 1994-11-24 | Taligent, Inc. | Multimedia synchronization system |
| JPH09222848A (en) * | 1995-12-12 | 1997-08-26 | N T T Data Tsushin Kk | Remote lecture system and network system |
| CN1336598A (en) * | 2001-09-07 | 2002-02-20 | 清华大学 | Quasi-synchronous master-slave remote education information management system and its implementation method |
| CN1400541A (en) * | 2002-08-20 | 2003-03-05 | 西安交通大学 | Multimedia real-time lessons-giving system based on IP web |
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