CN204331706U - A kind of Computer Distance Education input circuit - Google Patents
A kind of Computer Distance Education input circuit Download PDFInfo
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- CN204331706U CN204331706U CN201520023665.4U CN201520023665U CN204331706U CN 204331706 U CN204331706 U CN 204331706U CN 201520023665 U CN201520023665 U CN 201520023665U CN 204331706 U CN204331706 U CN 204331706U
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Abstract
The utility model provides a kind of Computer Distance Education input circuit, and solving cannot restraint speckle and the not high problem of text event detection accuracy; Its scheme is, comprise described acoustic reception sensor and connect differential amplifier circuit, differential amplifier circuit connects filtering circuit, and filtering circuit connects sound identification module, sound identification module connects analog to digital conversion circuit, and analog to digital conversion circuit connects input generator; The utility model structure is simple, and Speech input, through differential amplifier circuit, suppresses the common-mode signal of voice signal and noise signal, amplifies difference mode signal; Phonetic entry to filter after high-frequency signal through sound identification module speech decomposition become multiple phoneme again and identify each phoneme through low-pass filter circuit, improves the accuracy of speech recognition input.
Description
Technical field
The utility model relates to speech recognition input technology field, especially a kind of Computer Distance Education input circuit.
Background technology
Current existing computing machine adopts keyboard and mouse and board as input device mostly, especially input through keyboard generally adopts the Five-stroke Method and phonetic transcription as character input modes, and input through keyboard is based on 26 English alphabets, but its technology difficulty is grasped and input effect is slow, has some limitations.
Chinese patent literature discloses a kind of computer installation (application number: 201420374805.8 that can realize speech recognition input; Publication No.: CN 203930684 U), this device comprises acoustic reception sensor, sound identification module, analog to digital conversion circuit, input generator and display, described sound identification module is used for speech decomposition being multiple phoneme and identifying each phoneme, although improve the efficiency of text event detection, but the input of noise can not be inhibited, its input accuracy is not high, causes unnecessary trouble to user.
Summary of the invention
For above-mentioned situation, for overcoming the defect of prior art, the object of the utility model is just to provide a kind of Computer Distance Education input circuit, and effectively solving cannot restraint speckle and the not high problem of text event detection accuracy.
Its technical scheme solved is, comprise acoustic reception sensor, differential amplifier circuit, filtering circuit and sound identification module, analog to digital conversion circuit and input generator, described acoustic reception sensor connects differential amplifier circuit, differential amplifier circuit connects filtering circuit, filtering circuit connects sound identification module, sound identification module connects analog to digital conversion circuit, analog to digital conversion circuit connects input generator, described differential amplifier circuit and filtering circuit, comprise resistance R9, resistance R10, resistance R11, resistance R12, resistance R13, resistance R14, resistance R15, resistance R16, resistance R17, resistance R18, electric capacity C5, electric capacity C6, electric capacity C7, electric capacity C8 and transport and placing device U3, one end of described resistance R9 and one end of resistance R11 are input end, the other end of resistance R9 connects one end of electric capacity C5, the other end ground connection GND of electric capacity C5, the other end of resistance R9 also connects the input end in the same way of transport and placing device U3, one end of the input end in the same way of transport and placing device U3 also contact resistance R17, one end of the other end contact resistance R18 of resistance R17, the other end ground connection GND of resistance R18, the other end of resistance R11 connects one end of electric capacity C6, the other end ground connection GND of electric capacity C6, one end of the other end of resistance R11 also contact resistance R12, the other end of resistance R12 connects the reverse input end of transport and placing device U3, one end of the reverse input end of transport and placing device U3 also contact resistance R13, one end of the other end contact resistance R14 of resistance R13, the other end ground connection GND of resistance R14, one end of the other end of resistance R13 also contact resistance R15, the other end of resistance R13 also connects one end of electric capacity C7, the other end of electric capacity C7 is all connected the output terminal of transport and placing device U3 with the other end of resistance R15, one end of the output terminal of transport and placing device U3 also contact resistance R16, the other end of resistance R16 connects one end of electric capacity C8, one end of the other end of resistance R16 also contact resistance R2.
The utility model structure is simple, and Speech input, through differential amplifier circuit, suppresses the common-mode signal of voice signal and noise signal, amplifies difference mode signal; Phonetic entry to filter after high-frequency signal through sound identification module speech decomposition become multiple phoneme again and identify each phoneme through low-pass filter circuit, improves the accuracy of speech recognition input.
Accompanying drawing explanation
Fig. 1 is the sound identification module circuit diagram of prior art.
Fig. 2 is principle of work block diagram of the present utility model.
Fig. 3 is the circuit connection diagram of differential amplifier circuit of the present utility model, filtering circuit and sound identification module.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in further detail.
Provided by Fig. 1 to Fig. 3, the utility model comprises acoustic reception sensor, differential amplifier circuit, filtering circuit and sound identification module, analog to digital conversion circuit and input generator, described acoustic reception sensor connects differential amplifier circuit, differential amplifier circuit connects filtering circuit, filtering circuit connects sound identification module, sound identification module connects analog to digital conversion circuit, analog to digital conversion circuit connects input generator, described differential amplifier circuit and filtering circuit, comprise resistance R9, resistance R10, resistance R11, resistance R12, resistance R13, resistance R14, resistance R15, resistance R16, resistance R17, resistance R18, electric capacity C5, electric capacity C6, electric capacity C7, electric capacity C8 and transport and placing device U3, one end of described resistance R9 and one end of resistance R11 are input end, the other end of resistance R9 connects one end of electric capacity C5, the other end ground connection GND of electric capacity C5, the other end of resistance R9 also connects the input end in the same way of transport and placing device U3, one end of the input end in the same way of transport and placing device U3 also contact resistance R17, one end of the other end contact resistance R18 of resistance R17, the other end ground connection GND of resistance R18, the other end of resistance R11 connects one end of electric capacity C6, the other end ground connection GND of electric capacity C6, one end of the other end of resistance R11 also contact resistance R12, the other end of resistance R12 connects the reverse input end of transport and placing device U3, one end of the reverse input end of transport and placing device U3 also contact resistance R13, one end of the other end contact resistance R14 of resistance R13, the other end ground connection GND of resistance R14, one end of the other end of resistance R13 also contact resistance R15, the other end of resistance R13 also connects one end of electric capacity C7, the other end of electric capacity C7 is all connected the output terminal of transport and placing device U3 with the other end of resistance R15, one end of the output terminal of transport and placing device U3 also contact resistance R16, the other end of resistance R16 connects one end of electric capacity C8, one end of the other end of resistance R16 also contact resistance R2.
Described sound identification module, comprise resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8, electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4, transport and placing device U1 and transport and placing device U2, the other end of one end contact resistance R16 of described resistance R2, one end of the other end contact resistance R1 of resistance R2, the other end of resistance R1 connects the input end in the same way of transport and placing device U1, one end of resistance R1 also connects one end of electric capacity C1, the other end of electric capacity C1 connects the output terminal of transport and placing device U1, the other end of resistance R1 connects one end of electric capacity C4, the other end ground connection GND of electric capacity C4, 4 pins of transport and placing device U1 and 11 pins all ground connection GND, one end of the output terminal contact resistance R7 of transport and placing device U1, one end of the other end contact resistance R8 of resistance R7, the other end ground connection GND of resistance R8, the other end of resistance R7 also connects the reverse input end of transport and placing device U1, the output terminal of transport and placing device U1 also connects one end of electric capacity C2, the other end of electric capacity C2 connects one end of electric capacity C3, the other end of electric capacity C3 connects the input end in the same way of transport and placing device U2, one end of the other end of electric capacity C3 also contact resistance R4, the other end ground connection GND of resistance R4, one end of the other end of electric capacity C2 also contact resistance R3, the other end of resistance R3 also connects the output terminal of transport and placing device U2, 4 pins of transport and placing device U2 and 11 pins all ground connection GND, one end of the output terminal contact resistance R5 of transport and placing device U2, one end of the other end contact resistance R6 of resistance R5, the other end ground connection GND of resistance R6, the other end of resistance R5 also connects the reverse input end of transport and placing device U2, the output terminal of transport and placing device U2 is signal output part OUT.
The utility model in use, acoustic reception sensor converts the voice signal of reception to electric signal, described electric signal is differential inputs to differential amplifier circuit, form after filtering circuit and resistance R11 and electric capacity C6 form filtering circuit filtering through resistance R9 and electric capacity C5, high frequency is filtered again through electric capacity C7, amplify through transport and placing device U3, then input to sound identification module after resistance R16 and electric capacity C8 filtering; Especially the resistance R17 that the input end in the same way of transport and placing device U3 is connected with reverse input end answers corresponding identical with the model of resistance R12 with resistance with resistance R13, resistance R18 and resistance R14, resistance R10, differential amplifier circuit effectively inhibits the common-mode signal of voice signal and noise signal, be exaggerated difference mode signal, filtering circuit filters the high-frequency signal in difference mode signal simultaneously, improves the accuracy of speech recognition input.
The output signal of differential amplifier circuit and filtering circuit is resolved into multiple phoneme and identifies each phoneme by sound identification module, each phoneme converts digital signal to through analog to digital conversion circuit, and described digital signal generates through input generator the binary code instructions that computing machine can identify input automatically.
The utility model structure is simple, and Speech input, through differential amplifier circuit, suppresses the common-mode signal of voice signal and noise signal, amplifies difference mode signal; Phonetic entry to filter after high-frequency signal through sound identification module speech decomposition become multiple phoneme again and identify each phoneme through low-pass filter circuit, improves the accuracy of speech recognition input.
Claims (2)
1. a Computer Distance Education input circuit, comprise acoustic reception sensor, differential amplifier circuit, filtering circuit and sound identification module, analog to digital conversion circuit and input generator, described acoustic reception sensor connects differential amplifier circuit, differential amplifier circuit connects filtering circuit, filtering circuit connects sound identification module, sound identification module connects analog to digital conversion circuit, analog to digital conversion circuit connects input generator, it is characterized in that, described differential amplifier circuit and filtering circuit, comprise resistance R9, resistance R10, resistance R11, resistance R12, resistance R13, resistance R14, resistance R15, resistance R16, resistance R17, resistance R18, electric capacity C5, electric capacity C6, electric capacity C7, electric capacity C8 and transport and placing device U3, one end of described resistance R9 and one end of resistance R11 are input end, the other end of resistance R9 connects one end of electric capacity C5, the other end ground connection GND of electric capacity C5, the other end of resistance R9 also connects the input end in the same way of transport and placing device U3, one end of the input end in the same way of transport and placing device U3 also contact resistance R17, one end of the other end contact resistance R18 of resistance R17, the other end ground connection GND of resistance R18, the other end of resistance R11 connects one end of electric capacity C6, the other end ground connection GND of electric capacity C6, one end of the other end of resistance R11 also contact resistance R12, the other end of resistance R12 connects the reverse input end of transport and placing device U3, one end of the reverse input end of transport and placing device U3 also contact resistance R13, one end of the other end contact resistance R14 of resistance R13, the other end ground connection GND of resistance R14, one end of the other end of resistance R13 also contact resistance R15, the other end of resistance R13 also connects one end of electric capacity C7, the other end of electric capacity C7 is all connected the output terminal of transport and placing device U3 with the other end of resistance R15, one end of the output terminal of transport and placing device U3 also contact resistance R16, the other end of resistance R16 connects one end of electric capacity C8, one end of the other end of resistance R16 also contact resistance R2.
2. a kind of Computer Distance Education input circuit according to claim 1, it is characterized in that, described sound identification module, comprise resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8, electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4, transport and placing device U1 and transport and placing device U2, the other end of one end contact resistance R16 of described resistance R2, one end of the other end contact resistance R1 of resistance R2, the other end of resistance R1 connects the input end in the same way of transport and placing device U1, one end of resistance R1 also connects one end of electric capacity C1, the other end of electric capacity C1 connects the output terminal of transport and placing device U1, the other end of resistance R1 connects one end of electric capacity C4, the other end ground connection GND of electric capacity C4, 4 pins of transport and placing device U1 and 11 pins all ground connection GND, one end of the output terminal contact resistance R7 of transport and placing device U1, one end of the other end contact resistance R8 of resistance R7, the other end ground connection GND of resistance R8, the other end of resistance R7 also connects the reverse input end of transport and placing device U1, the output terminal of transport and placing device U1 also connects one end of electric capacity C2, the other end of electric capacity C2 connects one end of electric capacity C3, the other end of electric capacity C3 connects the input end in the same way of transport and placing device U2, one end of the other end of electric capacity C3 also contact resistance R4, the other end ground connection GND of resistance R4, one end of the other end of electric capacity C2 also contact resistance R3, the other end of resistance R3 also connects the output terminal of transport and placing device U2, 4 pins of transport and placing device U2 and 11 pins all ground connection GND, one end of the output terminal contact resistance R5 of transport and placing device U2, one end of the other end contact resistance R6 of resistance R5, the other end ground connection GND of resistance R6, the other end of resistance R5 also connects the reverse input end of transport and placing device U2, the output terminal of transport and placing device U2 is signal output part OUT.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520023665.4U CN204331706U (en) | 2015-01-14 | 2015-01-14 | A kind of Computer Distance Education input circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520023665.4U CN204331706U (en) | 2015-01-14 | 2015-01-14 | A kind of Computer Distance Education input circuit |
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| Publication Number | Publication Date |
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| CN204331706U true CN204331706U (en) | 2015-05-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520023665.4U Expired - Fee Related CN204331706U (en) | 2015-01-14 | 2015-01-14 | A kind of Computer Distance Education input circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104868915A (en) * | 2015-05-30 | 2015-08-26 | 宁波摩米创新工场电子科技有限公司 | Linear drive type speech recognition system based on analog to digital conversion circuit |
| CN106531155A (en) * | 2015-09-10 | 2017-03-22 | 三星电子株式会社 | Apparatus and method for generating acoustic model, and apparatus and method for speech recognition |
| CN114598968A (en) * | 2022-03-05 | 2022-06-07 | 深圳市音络科技有限公司 | Front noise reduction circuit and device for analog microphone |
-
2015
- 2015-01-14 CN CN201520023665.4U patent/CN204331706U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104868915A (en) * | 2015-05-30 | 2015-08-26 | 宁波摩米创新工场电子科技有限公司 | Linear drive type speech recognition system based on analog to digital conversion circuit |
| CN104868915B (en) * | 2015-05-30 | 2017-12-01 | 宁波摩米创新工场电子科技有限公司 | A kind of Linear drive speech recognition system based on analog to digital conversion circuit |
| CN106531155A (en) * | 2015-09-10 | 2017-03-22 | 三星电子株式会社 | Apparatus and method for generating acoustic model, and apparatus and method for speech recognition |
| CN106531155B (en) * | 2015-09-10 | 2022-03-15 | 三星电子株式会社 | Apparatus and method for generating acoustic model and apparatus and method for speech recognition |
| CN114598968A (en) * | 2022-03-05 | 2022-06-07 | 深圳市音络科技有限公司 | Front noise reduction circuit and device for analog microphone |
| CN114598968B (en) * | 2022-03-05 | 2024-05-07 | 深圳市音络科技有限公司 | Front noise reduction circuit and device for analog microphone |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150513 Termination date: 20160114 |