CN102663909A - Wireless phonetic teaching system - Google Patents
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- CN102663909A CN102663909A CN2012101021082A CN201210102108A CN102663909A CN 102663909 A CN102663909 A CN 102663909A CN 2012101021082 A CN2012101021082 A CN 2012101021082A CN 201210102108 A CN201210102108 A CN 201210102108A CN 102663909 A CN102663909 A CN 102663909A
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Abstract
The invention discloses a wireless phonetic teaching system which is composed of a center machine, a channel plate and extension machines for students. A teacher uses the center machine which is used for transmitting audio signals including voice of the teacher, listening records and the like to the extension machines for the students by means of wireless digital transmission technology, and the students use the extension machines for the students to receive audio data and restore the audio data into the audio signals. The system provides a down audio channel, further provides an up communication channel serving as a channel for summing up answer results of the students, and convenience is brought for the teacher to acquire the results of the students.
Description
Technical field
The present invention relates to the radio transmitting method of voice signal and the contents such as radio transmitting method of answer data.
Background technology
The voice classroom is that traditional form of teaching has injected new vitality, at present, just is able to promote the use of at school and college and educational institution.But need hundreds of thousands owing to set up a voice classroom (60 for each person every student about 3000 to 4000 yuan), input is bigger, in special secondary school, senior middle school, first medium, particularly rural area, outlying mountain area, still can't promote the use of.
Can solution to the problems described above be to adopt the wireless teaching system, the cost of setting up the voice classroom is descended greatly.The known teaching system is the basis with the mode of frequency regulation of simulating at present, carries out similar and wireless analogue audio frequency transmission.Such system can only accomplish the downlink transfer of sound signal, does not have the function of synchronous answer data upload.The dirigibility of antijamming capability and use is all very poor.
Summary of the invention
The present invention is directed to the proposition of above problem; And a kind of wireless speech interactive education system with up channel of development; Comprise: the group that center machine and a plurality of student's extension set constitute: center machine: supply the teacher to use, have a plurality of ANTENNAUDIO transmission channels, selected one or more student's extension sets; Through said ANTENNAUDIO transmission channel, transmit specific audio file or real-time voice to selected student's extension set;
Said center machine also has: communication interface modules, single-chip microcomputer I, COBBAIF and audio conversion matrix;
Communication interface: connect host computer and said single-chip microcomputer I, be used for the communication between host computer and the single-chip microcomputer I; COBBAIF: be connected with source of sound, receive the audio file or the real-time voice of source of sound transmission, audio frequency is sent to the audio frequency switching matrix; Audio conversion matrix: receive and storing audio; Single-chip microcomputer I: the address condition code of resolving the said selected student's extension set of instruction, establishment that host computer assigns; The ANTENNAUDIO passage that instruction with the audio frequency in the audio frequency switching matrix, after resolving and address condition code are sent to appointment; The ANTENNAUDIO passage: I is connected with single-chip microcomputer, receives and sends described audio frequency, instruction and address condition code to group;
Student's extension set: supply the student to use, have wireless transmission unit, receive audio frequency, instruction and condition code that transmits by center machine and the various instructions of assisting student's centring machine to assign and give a response; Student's extension set also has: single-chip microcomputer II, audio conversion unit, audio frequency input-output device, keyboard input block and output unit;
Wireless transport module: audio frequency, instruction and address condition code that reception and storage center machine transmit; The address condition code is sent to single-chip microcomputer II; Whether single-chip microcomputer II: it is identical with the address of this machine to analyze the address condition code: if identical, said audio frequency is sent to the audio conversion unit, will instructs and send the student to through output unit, accomplish the transmission of downlink command and audio frequency; If the address is different, then empty wireless transport module;
ANTENNAUDIO transmission channel in the said center machine has: wireless transport module, storer, single-chip microcomputer III, audio conversion module and control interface; The student is through the keyboard input block input instruction of said student's extension set, and instruction through after resolving, is sent to the ANTENNAUDIO transmission channel of center machine by single-chip microcomputer II with wireless mode by the wireless transport module of student's extension set; Instruction is deposited with earlier in the storer in the said ANTENNAUDIO transmission channel after handling through single-chip microcomputer III; Simultaneously, single-chip microcomputer III sends signal to center machine, deposits in the notice center machine said ANTENNAUDIO transmission channel to remain processed instruction; By the teacher of communication interface notifying operation host computer in the center machine, the teacher assigns instruction according to actual conditions, and the instruction that is deposited with said ANTENNAUDIO transmission channel internal storage is uploaded to host computer teacher place, accomplishes the transmission of up-on command.
The wireless transmission unit of student's extension set when starting each time, is sent enabling signal from the trend center machine; The enabling signal that center machine receives and stores each student's extension set of uploading after single-chip microcomputer II parsing, is uploaded to host computer through control interface, and the current student's extension set numbering that is in open state is presented to the teacher.
Also have the audio frequency data feedback channel: the teacher selects student's extension set in the group, and center machine is set the up authority of said selected student's extension set and given instruction and address condition code, sends in group through said wireless transfer channel; The wireless transport module of the student's extension set that is chosen receives up authority and gives instruction and address condition code, said address condition code is sent to single-chip microcomputer II confirms whether mate with this machine; After confirming coupling, single-chip microcomputer II resolves said up authority and gives instruction, and the prompting student is by audio frequency input-output device input audio frequency; Said audio frequency is accomplished digital-to-analog conversion through the audio conversion unit, is sent to the inner ANTENNAUDIO transmission channel of center machine through wireless transport module, and is stored in the ANTENNAUDIO passage; Said wireless speech passage is informed single-chip microcomputer I, and the passage internal memory remains processing audio, and single-chip microcomputer I sends said audio frequency to teacher through COBBAIF according to teacher's wish, accomplishes uploading of audio frequency.The single-chip microcomputer I of said center machine, according to teacher's wish, the address condition code and the instruction of other student's extension sets with the audio frequency that said selected student's extension set is uploaded, send other student's extension sets in the group in the establishment group.
The single-chip microcomputer I of center machine sets polling time interval, sets upload permissions for each the student's extension set in the group and gives instruction, address condition code and uplink time; Each poll time, send the upload permissions of student's extension set and give instruction and address condition code; Each student's extension set, only teletype command on the uplink time of oneself.
Center machine has the MCVF multichannel voice frequency input interface that can import a plurality of audio frequency simultaneously; Single-chip microcomputer I according to teacher's wish, is divided into a plurality of groups with group, sends in said a plurality of audio frequency to each group.
Owing to adopted technique scheme, the present invention provided by the invention is decomposed into center machine, channel plate and student's extension set with the voice system of giving lessons.The teacher uses center machine, and center machine is responsible for sound signals such as teacher's speech and hearing recording are sent to student's extension set with wireless transmission technology.The student uses student's extension set to receive voice data and is reduced to sound signal.System also provides the channel of uplink communication channel as student's answer result statistics when the downstream tones path is provided, provide convenience for the teacher gathers student performance.
Description of drawings
Technical scheme for clearer explanation embodiments of the invention or prior art; To do one to the accompanying drawing of required use in embodiment or the description of the Prior Art below introduces simply; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural drawing of center machine of the present invention
Fig. 2 is the structural drawing of center machine ANTENNAUDIO passage of the present invention
Fig. 3 is the structural drawing of student's extension set of the present invention
Embodiment
For the purpose, technical scheme and the advantage that make embodiments of the invention clearer; Below in conjunction with the accompanying drawing in the embodiment of the invention; Technical scheme in the embodiment of the invention is known complete description; Obviously, described embodiment is a part of embodiment of the present invention, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to protection scope of the present invention not making all other embodiment that obtained under the creative work prerequisite.
A kind of wireless speech interactive education system comprises the center machine 1 of confession teacher use and the group that a plurality of student's extension sets 2 constitute;
As shown in Figure 1: center machine 1, use by the teacher, can according to teacher's wish among group, choose one or more student's extension sets 2, with wireless mode, transmit specific audio file or real-time voice to selected student's extension set.
Center machine 1: supply the teacher to use; Have a plurality of ANTENNAUDIO transmission channels 3; Be used for one or more student's extension set 2 in the selected group; Through ANTENNAUDIO transmission channel 3, can transmit specific instruction to selected student's extension set 2 with wireless transmission mode according to teacher's wish, control student extension set is accomplished relevant task; Assign audio file or transmit real-time voice to student's extension set, accomplish the conversation between center machine 1 and the student's extension set 2.
Be to realize above-mentioned functions, as a preferred implementation: center machine 1 also has: communication interface modules 101, single-chip microcomputer I102, COBBAIF 103, audio conversion matrix 104 and control interface 105;
Communication interface modules 101: connect the single-chip microcomputer I102 in host computer and the center machine 1, be used for the communication between host computer and the single-chip microcomputer I102.Preferably, said communication interface modules 101 is integrated comprises numerous interfaces such as serial communication interface, usb communication interface and network interface.
COBBAIF 103: be connected with source of sound, receive the audio file of source of sound transmission or the real-time voice that sends by the teacher, and audio frequency is sent to audio frequency switching matrix 104; Audio conversion matrix 104: receive and temporary transient storing audio.
Single-chip microcomputer I102: the instruction that the parsing host computer is assigned, the address condition code of working out student's extension set of selecting by the teacher; The ANTENNAUDIO passage 3 that instruction with the audio frequency in the audio frequency switching matrix 104, after resolving and address condition code are sent to appointment.
ANTENNAUDIO passage 3: I102 is connected with single-chip microcomputer, receives and sends described audio frequency, instruction and address condition code to group.
Student's extension set 2: supply the student to use, have wireless transport module 201, receive audio frequency, instruction and condition code that transmits by center machine and the various instructions of assisting student's centring machine to assign and make corresponding response.
In order to realize above-mentioned functions, student's extension set also is provided with: single-chip microcomputer II202, audio conversion unit 203, audio frequency input-output device 204, keyboard input block 205 and output unit 206.
Wireless transport module 201: audio frequency, instruction and address condition code that the receiving center machine transmits, and the content that receives temporarily is stored in the module, to the address condition code is sent to single-chip microcomputer II;
Whether single-chip microcomputer II202: it is identical with the address of this machine to analyze the address condition code: if identical, said audio frequency is sent to audio conversion unit 203, will instructs and send the student to through output unit, accomplish the transmission of downlink command and audio frequency; If the address is different, then empty wireless transport module 201.
Embodiment 1, the transmission of downlink command:
Center machine 1 is in real work, and each ANTENNAUDIO transmission channel 3 is switched between all can and accepting in emission continually.The SF of speech sample is 8KHZ, and a radio frequency packing operation is carried out in per 16 samplings, and the address condition code (2 bytes) with steering order (1 byte) and target student extension set in the time of packing is write in the transmission buffer zone by single-chip microcomputer I102.The ANTENNAUDIO transmission channel 3 of center machine 1 transfers receiving mode to after having sent data, wait for the response of student's extension set 2.Just transfer transmit status to up to 16 audio samples end next time.
The state exchange that center machine 1 every 2ms will carry out one-period switches.Just have p.s. 500 times.
Each delivery time; Student's extension address pointer of single-chip microcomputer I102 all can add 1 in the center machine 1, to realize the poll one by one to all student's extension sets 2, supposes to have 50 extension sets; Then every extension set can have the chance of 10 communications p.s., can reach more real-time effect.
Student's extension set 2 is received after the rf data bag, and voice data is put into play buffer, analyzes the address condition code then, if inequality then skip with the address of this machine, does not go to carry out; If identical, then carry out subsidiary steering order with local address.
Student's extension set 2 will be given 1 one responses of center machine after receiving the instruction that belongs to this machine, otherwise in next one circulation, the center reaches also can retransmit an instruction, loses to prevent instruction.
ANTENNAUDIO transmission channel 3 in the center machine 1 has: wireless transport module 301, storer 303, single-chip microcomputer III302, audio conversion module 304 and control interface 305.
Embodiment 2, and the transmission of up-on command is designed to student's answer data.When carrying out the hearing examination, the student can key in the answer of oneself:
The student is through the keyboard input block 205 input upstream request instructions of said student's extension set 2; This request instruction through after resolving, is sent to the ANTENNAUDIO transmission channel 3 of center machine by single-chip microcomputer II202 with wireless mode by the wireless transport module 201 of student's extension set 2;
After instruction is handled through single-chip microcomputer III302, be deposited with earlier in the storer 303 in the said ANTENNAUDIO transmission channel 3;
Simultaneously, single-chip microcomputer III302 sends signal to center machine 1, deposits pending request instruction in the notice center machine 1 said ANTENNAUDIO transmission channel 3;
Teacher by communication interface modules 101 notifying operation host computers in the center machine 1; The teacher is according to actual conditions; Assign instruction, the instruction that is deposited with said ANTENNAUDIO transmission channel 3 internal storage 303 is uploaded to host computer teacher place, accomplish the transmission of up-on command.
Student's extension set 2 is pressed the acknowledgement key of lower keyboard input block 205 the student; Accomplish uploading of request instruction; The state exchange of student's extension set 2 is an accepting state, and promptly wireless transport module 201 converts receive status into, and student's extension set 2 waits for that one's own downlink command arrives; When receiving one's own downlink command, transfer student's extension set 2 states to transmit status again and carry out uploading of answer data.Mean this current time slot, have only described this student's extension set 2 can upload the answer data, can avoid the conflict of many extension set communications so to greatest extent.Center machine 1 is received after the data, in next cycle period, will provide this extension set and respond, otherwise student's extension set 2 will carry out the mistake retransmission operation.
Can be computing machine, CD player, magnetic tape station, radio and the teacher multiple sources of sound such as real-time voice with the output of equipment such as MIC by teacher control center machine 1 to the source of sound of the downstream tones of group broadcast.Downstream tones can be input to through the MCVF multichannel voice frequency input interface 103 in the center machine 1 to be nursed one's health in the operational amplification circuit and amplifies; Sound signal after the amplification is through audio frequency switching matrix 104, is sent among the corresponding ANTENNAUDIO transmission channel 3 by single-chip microcomputer I102 control.
ANTENNAUDIO transmission channel 3 is carried out the pcm encoder operation with this sound signal; With the control of the voice signal behind the coding through single-chip microcomputer III (302), per 16 bytes are made a call to a packet, through the SPI interface; Deliver in the radio-frequency transmissions circuit, change the 2.4GHZ radiofrequency signal into.
Be in the radio circuit of accepting state on student's extension set 2; Be that said wireless transport module 201 receives after the radiofrequency signal that sends; There is not mistake then to send interrupt request through CRC check to the single-chip microcomputer II202 of student's extension set 2; After the single-chip microcomputer II202 sense data, the voice data of 16 bytes is decoded with the interval of 0.125ms, the sound that just can restore source of sound clearly and played back at the output terminal of demoder like this.
Center machine 1 has a plurality of ANTENNAUDIO transmission channels 3; Each ANTENNAUDIO transmission channel 3 all has the frequency range and the address of oneself working, and audio conversion matrix 104 can be delivered to the audio frequency of two-way or multichannel input on any one ANTENNAUDIO transmission channel 3 arbitrarily.Can use the mode of manual selection after 2 starts of student's extension set, adjust the frequency range that this machine receives, select to listen to different audio frequency.In case selected after the frequency range, this frequency range can be kept in the Flash storer of extension set, and power down can not lost, and shutdown also can be selected on this frequency range after starting shooting again automatically.
Embodiment 4, the transfer function of upstream tones:
The teacher makes into to allow conversation for earlier student's to be putd question to state through software interface, and like this, this student has just obtained the authority of up transmission sound signal.The up authority that center machine 1 is worked out said selected student's extension set 2 according to teacher's wish is given instruction and address condition code, sends in group through said wireless transfer channel 3.
The wireless transport module 201 of the student's extension set 2 that is chosen receives up authority and gives instruction and address condition code, said address condition code is sent to single-chip microcomputer II202 confirms whether mate with this machine.
After confirming coupling, the student's extension set 2 that is chosen has just had the authority of sending upstream tones.Single-chip microcomputer II202 resolves said up authority and gives instruction, and the prompting student is by audio frequency input-output device 204 input audio frequency.Preferably, said input-output device 204 is for having the headset of microphone.The student presses " conversation " button after the permission speech that obtains teacher, tell up speech through the microphone of headset, unclamps talk button after speech finishes, and up sound transmits and finishes.Said speech, promptly described speech is accomplished digital-to-analog conversion through audio conversion unit 203, is sent to the inner ANTENNAUDIO transmission channel 3 of center machine through wireless transport module 201, and is stored in this ANTENNAUDIO transmission channel 3; Said ANTENNAUDIO transmission channel 3 is informed single-chip microcomputer I102, and the passage internal memory remains processing audio, and single-chip microcomputer I102 sends said audio frequency to teacher through COBBAIF 103 according to teacher's wish.Up voice signal carries out the pcm encoder operation by extension set, and with the control of the voice signal behind the coding through the extension set single-chip microcomputer, per 16 bytes are made a call to a packet, through the SPI interface, deliver in the radio-frequency transmissions circuit, change the 2.4GHZ radiofrequency signal into.
The radio circuit that is in accepting state on the center machine receives after the radiofrequency signal that sends; There is not mistake then to send interrupt request through CRC check to the single-chip microcomputer of center machine; After the single-chip microcomputer sense data; The voice data of 16 bytes is decoded the sound that can restore source of sound clearly and played back at the output terminal of demoder like this with the interval of 0.125ms.
Further, consider that the classroom instruction meeting need send a student's answer content the classmate of full class to.The single-chip microcomputer I102 of center machine is according to teacher's wish, and the address condition code and the instruction of other student's extension sets with the audio frequency that said selected student's extension set 2 is uploaded, send other student's extension sets 2 in the group in the establishment group.
Embodiment 5: a plurality of students are answering function simultaneously
Consider, the same time, to a problem, the situation of a plurality of students answer simultaneously can appear, and as a preferred implementation, center machine 1 has polling mechanism:
The single-chip microcomputer I102 of center machine; Set polling time interval; Set upload permissions for each student's extension set in the group 2 and give instruction, different address condition code and uplink time separately, and each poll time, the upload permissions of sending student's extension set is given and being instructed and the address condition code; Each student's extension set 2, only teletype command on the uplink time of oneself.
Center machine 1 will be divided by the address of extension set the time, and each student's extension set 2 is distributed to the time slot of 2mS, always adds the authority of geologic feature sign indicating number and mandate at packet and gives instruction.
2 in student's extension set just transmits the answer data on center machine 1 after receiving that one's own address condition code and authority are given instruction.
Center machine 1 is numbered enterprising road wheel at all extension address and is ask scanning, and every student's extension set 2 all can have an opportunity to obtain the time slot of uplink transmission data like this.And the transmission of different student's extension sets can not bump.If because signal problem certain upload failure, can also make and remedying in the transmission next time.
With 50 branch computes of center machine 1 scanning, each extension set has 10 times transmission opportunity one second, and the student can not produce the sensation of any delay.
The transmission speed of communication interface is enough to satisfy a plurality of command frames between center machine 1 and the host computer, the communicating requirement of centralized, big data quantity.
Embodiment 6. bundlings examination function.
In order to increase the fairness of examination, native system can provide bundling examination function, and the teacher becomes student group into a plurality of groups in advance, and each group uses a cover examination paper:
Center machine 1 has the MCVF multichannel voice frequency input interface 103 that can import a plurality of audio frequency simultaneously; Single-chip microcomputer I102 according to teacher's wish, is divided into a plurality of groups with group, utilizes different ANTENNAUDIO transmission channels 3 to send in said a plurality of audio frequency to each group.
Common examination all can be provided with the A/B volume: the single-chip microcomputer I102 in the center machine 1; Control, is sent to different audio frequency with 2 road sources of sound and transmits in the passage to group broadcast with crossing audio conversion matrix 104 from 2 road source of sound of COBBAIF input; Different groups accepts different audio frequency; And make corresponding answer, the corresponding answer of keyboard input block 205 inputs at student's extension set 2 is sent in the corresponding ANTENNAUDIO transmission channel.
Each ANTENNAUDIO transmission channel of center machine 1 can have multiple frequency range selective, and when in use, the teacher in the pharmacy case does not use identical frequency range, just any conflict can not take place.
It is available that each ANTENNAUDIO transmission channel is designed with 6 frequency ranges, and what the frequency at interval was tried one's best between the channel widens, to avoid the interference between frequency range.Use the teacher to be provided with arbitrarily through software.And the mode native system of radio communication has adopted the mode of bursty communication; With high speed; Send all buffer datas at short notice, reduced the skyborne life period of radiofrequency signal as far as possible, reduced adjacent class device signal possibility of collision to the greatest extent to greatest extent.
Claims (6)
1. wireless speech interactive education system is characterized in that comprising:
The group that center machine (1) and a plurality of student's extension set (2) constitute:
Center machine (1): supply the teacher to use, have a plurality of ANTENNAUDIO transmission channels (3), selected one or more student's extension sets (2) through said ANTENNAUDIO transmission channel (3), transmit specific audio file or real-time voice to selected student's extension set (2);
Said center machine (1) also has: communication interface modules (101), single-chip microcomputer I (102), COBBAIF (103), audio conversion matrix (104) and control interface (105);
Communication interface modules (101): connect host computer and said single-chip microcomputer I (102), be used for the communication between host computer and the single-chip microcomputer I (102);
COBBAIF (103): be connected with source of sound, receive the audio file or the real-time voice of source of sound transmission, audio frequency is sent to audio frequency switching matrix (104); Audio conversion matrix (104): receive and storing audio;
Single-chip microcomputer I (102): the address condition code of resolving the said selected student's extension set of instruction, establishment that host computer assigns; The ANTENNAUDIO passage (3) that instruction with the audio frequency in the audio frequency switching matrix (104), after resolving and address condition code are sent to appointment;
ANTENNAUDIO passage (3): be connected with single-chip microcomputer I (102), receive and send described audio frequency, instruction and address condition code to group;
Student's extension set (2): supply the student to use, have wireless transport module (201), receive audio frequency, instruction and address condition code that transmits by center machine and the various instructions of assisting student's centring machine to assign and give a response;
Student's extension set also has: single-chip microcomputer II (202), audio conversion unit (203), audio frequency input-output device (204) and keyboard input block (205);
Wireless transport module (201): audio frequency, instruction and address condition code that reception and storage center machine transmit; The address condition code is sent to single-chip microcomputer II;
Whether single-chip microcomputer II (202): it is identical with the address of this machine to analyze the address condition code: if identical, said audio frequency is sent to audio conversion unit (203), will instructs and send the student to through output unit, accomplish the transmission of downlink command and audio frequency; If the address is different, then empty wireless transport module (201);
ANTENNAUDIO transmission channel (3) in the said center machine has: wireless transport module (301), storer (303), single-chip microcomputer III (302), audio conversion module (304) and control interface (305);
The student is through the up authority request instruction of keyboard input block (205) input of said student's extension set (2); This instruction through after resolving, is sent to the ANTENNAUDIO transmission channel (3) of center machine by single-chip microcomputer II (202) with wireless mode by the wireless transport module (201) of student's extension set (2);
Instruction is deposited with earlier in the storer (303) in the said ANTENNAUDIO transmission channel after handling through single-chip microcomputer III (302);
Simultaneously, single-chip microcomputer III (302) sends signal to center machine (1), deposits in notice center machine (1) said ANTENNAUDIO transmission channel (3) to remain processed instruction;
Teacher by communication interface modules (101) notifying operation host computer in the center machine (1); The teacher is according to actual conditions; Assign instruction, assign teletype command and address condition code to this student's extension set (2), said student's extension set (2) is on this machine of receiving after teletype command and the address condition code; Upload corresponding instruction, accomplish the transmission of up-on command.
2. wireless speech tutoring system according to claim 1, its characteristic also is: the wireless transport module (201) of said student's extension set (2), when starting each time, send enabling signal from the trend center machine; The enabling signal that center machine receives and stores each student's extension set (2) of uploading after single-chip microcomputer II (202) parsing, is uploaded to host computer through control interface (105), and current student's extension set (2) numbering that is in open state is presented to the teacher.
3. wireless speech tutoring system according to claim 1 is characterized in that also having the audio frequency data feedback channel:
The teacher selects the student's extension set (2) in the group, and the up authority of this student's extension set (2) of center machine establishment is given instruction and address condition code, sends in group through said wireless transfer channel (3); The wireless transport module (201) of the student's extension set (2) that is chosen receives up authority and gives instruction and address condition code, said address condition code is sent to single-chip microcomputer II (202) confirms whether mate with this machine; After confirming coupling, single-chip microcomputer II (202) resolves said up authority and gives instruction, and the prompting student is by audio frequency input-output device (204) input audio frequency; Said audio frequency is accomplished digital-to-analog conversion through audio conversion unit (203), is sent to the inner ANTENNAUDIO transmission channel (3) of center machine through wireless transport module (201), and is stored in this ANTENNAUDIO transmission channel (3); Said ANTENNAUDIO transmission channel (3) is informed single-chip microcomputer I (102), and the passage internal memory remains processing audio, and single-chip microcomputer I (102) sends said audio frequency to teacher through COBBAIF (103) according to teacher's wish, accomplishes uploading of audio frequency.
4. wireless speech tutoring system according to claim 3; Its characteristic also is: the single-chip microcomputer I (102) of said center machine is according to teacher's wish; The address condition code and the instruction of other student's extension sets in the establishment group; With the audio frequency that said selected student's extension set (2) is uploaded, send said other student's extension sets (2) in the group to.
5. wireless speech tutoring system according to claim 1, its characteristic also is: said center machine has polling mechanism:
The single-chip microcomputer I (102) of said center machine sets polling time interval, sets upload permissions for each the student's extension set (2) in the group and gives instruction, address condition code and uplink time; Each poll time, send the upload permissions of student's extension set and give instruction and address condition code; Each student's extension set (2), only teletype command on the uplink time of oneself.
6. wireless speech tutoring system according to claim 1, its characteristic also is: said center machine (1) has the MCVF multichannel voice frequency input interface (103) that can import a plurality of audio frequency simultaneously; Single-chip microcomputer I (102) according to teacher's wish, is divided into a plurality of groups with group, sends in said a plurality of audio frequency to each group.
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| CN104936150A (en) * | 2014-03-19 | 2015-09-23 | 宏碁股份有限公司 | Electronic device and voice data transmission method |
| CN109326152A (en) * | 2018-11-12 | 2019-02-12 | 长春师范大学 | A kind of interactive Chinese Philology learning device and its application method |
| CN111192181A (en) * | 2020-01-10 | 2020-05-22 | 中山市杰而普智能科技有限公司 | Wireless on-site answering system and method applied to classroom teaching |
| CN113676461A (en) * | 2021-07-29 | 2021-11-19 | 北京金三惠科技有限公司 | Electric piano classroom management method and system |
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| CN109326152A (en) * | 2018-11-12 | 2019-02-12 | 长春师范大学 | A kind of interactive Chinese Philology learning device and its application method |
| CN111192181A (en) * | 2020-01-10 | 2020-05-22 | 中山市杰而普智能科技有限公司 | Wireless on-site answering system and method applied to classroom teaching |
| CN113676461A (en) * | 2021-07-29 | 2021-11-19 | 北京金三惠科技有限公司 | Electric piano classroom management method and system |
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