CN205281473U - Audio signal collection system based on sound card - Google Patents
Audio signal collection system based on sound card Download PDFInfo
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- CN205281473U CN205281473U CN201620032757.3U CN201620032757U CN205281473U CN 205281473 U CN205281473 U CN 205281473U CN 201620032757 U CN201620032757 U CN 201620032757U CN 205281473 U CN205281473 U CN 205281473U
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Abstract
The utility model relates to an audio system, more specifically say and relate to an audio signal collection system based on sound card, and audio signal carries out the difference transmission, reduces the sound card burden, possesses wide frequency signal detection region, and the sound card is independent with the computer, has reduced the computing time. Collection module is used for gathering external voice signal and turns into electric output with the voice signal, and amplifier circuit exports after carrying out power amplification with the input signal of telecommunication, and analog switch carries out the gating transmission to the signal. The sound card is exported after turning into data signal with the simulation signal of telecommunication, and the data signal treater carries out the gating order of analysis processes and discriminating digit audio signal, data signal treater output control signal control simulation switch to received data signal. Filter circuit gating specific frequency's wave form is exported, and modulated circuit is to incoming signal wave form modulate and export the distinguishable frequency ripples of sound card, and isolation transformer keeps apart modulated circuit with the sound card signal.
Description
Technical field
The utility model relates to a kind of audio frequency system, more specifically relates to a kind of audio signal sample system based on sound card.
Background technology
Along with the development of Multimedia technology, sound card has become the standard configuration of multi-media computer, and the quality of sound card has influence on the quality of tonequality. Present many occasions need multi channel signals to transmit, and information is carried out synchronous collection by sound card easily to be caused signal disturbing and to the performance requriements height of sound card, can improve cost. Adopting the mode of sound card and Automated library system during sound signal processing, signal need to carry out calculation process through central processing unit (CPU), takies computer resource. The frequency of some signal is outside the identification range of sound card, and sound card is little to the acquisition range of signal.
Practical novel content
The technical problem that the utility model mainly solves is: provide a kind of audio signal sample system based on sound card, sound signal carries out differential transfer, reduces sound card burden, possesses broadband signal acquisition range, sound card and computer are independent, reduce the Computing time.
For solving the problems of the technologies described above, the utility model relates to a kind of audio frequency system, more specifically relate to a kind of audio signal sample system based on sound card, comprise acquisition module, amplify circuit, analog switch, sound card, digital signal processor, oscilloscope, multi-media computer, filtering circuit, modulation circuit and isolating transformer, sound signal carries out differential transfer, reduces sound card burden, possesses broadband signal acquisition range, sound card and computer are independent, reduce the Computing time.
Input amplifier is connected with acquisition module, output terminal is connected with the input terminus of analog switch, acquisition module is for gathering external sound signal and voice signal is converted into electrical signal and exports, amplifying after input terminus electrical signal is carried out power magnification by circuit and export, signal is carried out gating transmission by analog switch. The output terminal of analog switch is connected with the input terminus of sound card, the output terminal of sound card is connected with digital signal processor, the output terminal of digital signal processor is connected with the input terminus of analog switch, sound card exports after simulation electrical signal is converted into numerary signal, the numerary signal received is carried out analyzing and processing and identifies digital audio signal by digital signal processor, and digital signal processor exports the gating order of control signal control simulation switch. Digital signal processor is connected with multi-media computer, and digital signal processor and computer carry out data and pass mutually, and multi-media computer completes the display of sound signal, broadcasting, control and communication. Oscilloscope is connected with digital signal processor, and oscilloscope is used for the waveform display of digital signal processor output signal. The input terminus of filtering circuit is connected with the output terminal amplifying circuit, the output terminal of filtering circuit is connected with the input terminus of modulation circuit, the output terminal of modulation circuit is connected with the input terminus of isolating transformer, the output terminal of isolating transformer is connected with analog switch, the waveform of the specific frequency of filtering circuit gating exports, waveform input signal is modulated and is exported the frequency wave that sound card can identify by modulation circuit, and modulation circuit and sound card signal are isolated by isolating transformer.
As the further optimization of this scheme, the acquisition module described in a kind of audio signal sample system based on sound card of the utility model is analog signal line or microphone or sensor.
As the further optimization of this scheme, the sound card that Shenzhen Die Wu Science and Technology Ltd. produces selected by the sound card described in a kind of audio signal sample system based on sound card of the utility model, and its model is DW8738CH6.
A kind of useful effect based on the audio signal sample system of sound card of the utility model is:
A. the performance requriements of sound card is not high, reduce sound card cost;
B. conversion speed is fast;
C. signal is spent height.
Accompanying drawing explanation
Fig. 1 is the system chart of a kind of audio signal sample system based on sound card of the utility model.
Embodiment
In FIG, the utility model relates to a kind of audio frequency system, more specifically relate to a kind of audio signal sample system based on sound card, comprise acquisition module, amplify circuit, analog switch, sound card, digital signal processor, oscilloscope, multi-media computer, filtering circuit, modulation circuit and isolating transformer, sound signal carries out differential transfer, reduces sound card burden, possesses broadband signal acquisition range, sound card and computer are independent, reduce the Computing time.
Input amplifier is connected with acquisition module, output terminal is connected with the input terminus of analog switch, acquisition module is for gathering external sound signal and voice signal is converted into electrical signal and exports, amplifying after input terminus electrical signal is carried out power magnification by circuit and export, signal is carried out gating transmission by analog switch. The output terminal of analog switch is connected with the input terminus of sound card, the output terminal of sound card is connected with digital signal processor, the output terminal of digital signal processor is connected with the input terminus of analog switch, sound card exports after simulation electrical signal is converted into numerary signal, the numerary signal received is carried out analyzing and processing and identifies digital audio signal by digital signal processor, and digital signal processor exports the gating order of control signal control simulation switch. Analog switch each time gating one road signal transmit so that sound card only process one road signal within a time period, reduces sound card burden. And sound signal carry out calculation process via digital signal processor after export through reduction digital audio signal media computer at the most, signal only need to be carried out showing by multi-media computer.
Digital signal processor is connected with multi-media computer, and digital signal processor and computer carry out data and pass mutually, and multi-media computer completes the display of sound signal, broadcasting, control and communication. Oscilloscope is connected with digital signal processor, and oscilloscope is used for the waveform display of digital signal processor output signal. Acquisition module is analog signal line or microphone or sensor. When acquisition module is sensor, the signal that sensor records carries out having shown the monitoring to target object with waveform. Oscilloscope completes the display of sensor acquired signal.
The input terminus of filtering circuit is connected with the output terminal amplifying circuit, the output terminal of filtering circuit is connected with the input terminus of modulation circuit, the output terminal of modulation circuit is connected with the input terminus of isolating transformer, the output terminal of isolating transformer is connected with analog switch, the waveform of the specific frequency of filtering circuit gating exports, waveform input signal is modulated and is exported the frequency wave that sound card can identify by modulation circuit, and modulation circuit and sound card signal are isolated by isolating transformer. Filtering circuit elimination high frequency ripple also retains the ripple of low frequency beyond sound card identification range and exports, frequency input signal is modulated signal signal frequency being modulated into sound card and can identifying by modulation circuit, then carries out separating mediation filtering process to restore low frequency signal to signal through digital signal processor.
Certain above-mentioned explanation is not limitation of the utility model; the utility model is also not limited only to above-mentioned citing; change, remodeling, interpolation or the replacement that those skilled in the art make in essential scope of the present utility model, also belongs to protection domain of the present utility model.
Claims (3)
1. the audio signal sample system based on sound card, comprise acquisition module, amplify circuit, analog switch, sound card, digital signal processor, oscilloscope, multi-media computer, filtering circuit, modulation circuit and isolating transformer, it is characterized in that: input amplifier is connected with acquisition module, output terminal is connected with the input terminus of analog switch, acquisition module is for gathering external sound signal and voice signal is converted into electrical signal and exports, amplifying after input terminus electrical signal is carried out power magnification by circuit and export, signal is carried out gating transmission by analog switch; The output terminal of analog switch is connected with the input terminus of sound card, the output terminal of sound card is connected with digital signal processor, the output terminal of digital signal processor is connected with the input terminus of analog switch, sound card exports after simulation electrical signal is converted into numerary signal, the numerary signal received is carried out analyzing and processing and identifies digital audio signal by digital signal processor, and digital signal processor exports the gating order of control signal control simulation switch; Digital signal processor is connected with multi-media computer, and digital signal processor and computer carry out data and pass mutually, and multi-media computer completes the display of sound signal, broadcasting, control and communication; Oscilloscope is connected with digital signal processor, and oscilloscope is used for the waveform display of digital signal processor output signal; The input terminus of filtering circuit is connected with the output terminal amplifying circuit, the output terminal of filtering circuit is connected with the input terminus of modulation circuit, the output terminal of modulation circuit is connected with the input terminus of isolating transformer, the output terminal of isolating transformer is connected with analog switch, the waveform of the specific frequency of filtering circuit gating exports, waveform input signal is modulated and is exported the frequency wave that sound card can identify by modulation circuit, and modulation circuit and sound card signal are isolated by isolating transformer.
2. a kind of audio signal sample system based on sound card according to claim 1, it is characterised in that: described acquisition module is analog signal line or microphone or sensor.
3. a kind of audio signal sample system based on sound card according to claim 1, it is characterised in that: the sound card that Shenzhen Die Wu Science and Technology Ltd. produces selected by described sound card, and its model is DW8738CH6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620032757.3U CN205281473U (en) | 2016-01-13 | 2016-01-13 | Audio signal collection system based on sound card |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620032757.3U CN205281473U (en) | 2016-01-13 | 2016-01-13 | Audio signal collection system based on sound card |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205281473U true CN205281473U (en) | 2016-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620032757.3U Expired - Fee Related CN205281473U (en) | 2016-01-13 | 2016-01-13 | Audio signal collection system based on sound card |
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| Country | Link |
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| CN (1) | CN205281473U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109413184A (en) * | 2018-10-31 | 2019-03-01 | 刘津金 | A kind of musical instrument instructional device, remote interactive teaching system, method and application |
-
2016
- 2016-01-13 CN CN201620032757.3U patent/CN205281473U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109413184A (en) * | 2018-10-31 | 2019-03-01 | 刘津金 | A kind of musical instrument instructional device, remote interactive teaching system, method and application |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20160601 Termination date: 20170113 |
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| CF01 | Termination of patent right due to non-payment of annual fee |