CN103338293A - Binaural recording device based on intelligent recording telephone, and recording method thereof - Google Patents
Binaural recording device based on intelligent recording telephone, and recording method thereof Download PDFInfo
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Abstract
The invention relates to a binaural recording device based on an intelligent recording telephone, and a recording method thereof. The problem of serious interference in the prior art is solved, and the main points of the technical scheme of the invention are: the recording device comprises a PSTN (public switched telephone network) exterior line receiving line, a microphone transmitting line, a telephone MCU (micro controller unit), an AD conversion module, a first independent sound channel, a second independent sound channel, a transmitting part circuit and a receiving part circuit; the first independent sound channel is connected with the PSTN exterior line receiving line through the AD conversion module; the second independent sound channel is connected with the microphone transmitting line through the AD conversion module; an input terminal of the transmitting part circuit is connected with an output terminal of the first independent sound channel; an output terminal of the transmitting part circuit is connected with an input/output port of the telephone MCU; an input terminal of the receiving part circuit is connected with an output terminal of the second independent sound channel; and an output terminal of the receiving part circuit is connected with the input/output port of the telephone MCU.
Description
Technical field
The present invention is a kind of sound pick-up outfit and the way of recording thereof, particularly relates to a kind of binaural recording equipment and way of recording thereof based on intelligent telegraphone.
Background technology
Along with the development of information technology, people are also increasingly extensive to the utilization of audio file, only do not need to hear the acoustical quality of high-quality, more need by to the audio file analysis, thereby reach the better utilization audio file, obtain useful audio-frequency information.
Summary of the invention
The objective of the invention is to have the problem that interference is big, acoustical quality is relatively poor, audio file is analyzed difficulty for solving present technical scheme, a kind of binaural recording equipment and way of recording thereof based on intelligent telegraphone is provided.
The technical solution adopted for the present invention to solve the technical problems is: a kind of binaural recording equipment based on intelligent telegraphone, comprise that the PSTN outside line talked about circuit, microphone send the words circuit, phone MCU, the AD modular converter, also comprise first separate channels, second separate channels, send the words partial circuit and talked about partial circuit, the input of described first separate channels is talked about circuit by the AD modular converter with the PSTN outside line and is connected, the input of described second separate channels send the words circuit to be connected by AD modular converter and microphone, the described input of words partial circuit that send is connected with the output of described first separate channels, the described output of words partial circuit that send is connected with described phone MCU input/output port, the described input of being talked about partial circuit is connected with the output of described second separate channels, the described output of being talked about partial circuit is connected with the input/output port of described phone MCU, describedly send the words partial circuit that circuit and microphone are talked about in the PSTN outside line to send the words circuit to separate, the first separate channels content is carried out independent sample send into phone MCU, the described partial circuit of being talked about send the words circuit to be talked about circuit with the PSTN outside line and separate microphone, the second separate channels content is carried out independent sample send into phone MCU, phone MCU carries out the content of first separate channels and the sampled signal of second separate channels to be merged into binaural recording after the AD conversion, realizes the analysis and utilization to audio file.The present invention has adopted the signal isolation that will send words and be talked about, the mode of sampling respectively, strengthened acoustical quality, simultaneously also convenient sound to different sound channels amplify, audio operation such as variation, can also send words or talked about wherein a part of the interference under the bigger situation, make the tonequality of another part that better preserve be arranged, can play conclusive application to the field of needs such as finance, law evidence obtainings, stop prior art and be subjected to environmental interference influence greatly, the record problem of lower tone.
As preferably, the described words partial circuit that send comprises: input power supply VCC2, input AUOUT, capacitor C 29, resistance R 63, resistance R 64, resistance R 66, optocoupler U3, triode Q14 and optocoupler U23, delivery outlet VPH, input MAUIN, resistance R 29, resistance R 67, resistance R 69 capacitor C 26 and triode Q20; Described input power supply VCC2 is successively by resistance R 63, capacitor C 29 ground connection, power supply VCC2 is also successively by resistance R 63, resistance R 64, resistance R 66 is connected with input AUOUT with capacitor C 30, power supply VCC2 also is connected with the control input end of optocoupler U3, the control output end of optocoupler U3 is connected with the control input end of optocoupler U23, first output of optocoupler U3 is connected with input AUOUT with capacitor C 30 by resistance R 66 successively, second output head grounding of optocoupler U3, first output of optocoupler U3 also is connected with the base stage of triode Q14, the grounded emitter of triode Q14, the collector electrode of triode Q14 is connected with the control output end of optocoupler U23, first output of optocoupler U23 is connected with the base stage of triode Q20, first output of optocoupler U23 also is connected with the collector electrode of triode Q20 by resistance R 69, second output of optocoupler U23 and the emitter of triode Q20, the grounded emitter of triode Q20, the collector electrode of triode Q20 is successively by resistance R 67 and capacitor C 26 ground connection, the collector electrode of triode Q20 is successively by resistance R 67, resistance R 29 is connected with delivery outlet VPH, the collector electrode of triode Q20 also is connected with input MAUIN, described triode Q20 and triode Q14 are the NPN pipe, input MAUIN send the words circuit to be connected by AD modular converter and microphone, delivery outlet VPH is electrically connected with described phone MCU, and input AUOUT is talked about circuit by the AD modular converter with the PSTN outside line and is connected.The present invention adopts circuit form like this, strengthened isolation, reduced interference, particularly send the interference signal of words part effectively to be reduced, strengthened acoustical quality, simultaneously also convenient sound to different sound channels amplify, audio operation such as variation, can also send words or talked about wherein a part of the interference under the bigger situation, make the tonequality of another part that better preserve be arranged, can play conclusive application to the field of needs such as finance, law evidence obtainings, stop prior art and be subjected to environmental interference influence greatly, the record problem of lower tone.
As preferably, the described partial circuit of being talked about comprises: resistance R 113, resistance R 112, resistance R 99, resistance R 158, resistance R 160, resistance R 114, resistance R 154, resistance R 104, resistance R 97, resistance R 103, R110, resistance R 65, resistance R 95, resistance R 161, resistance R 105 capacitor C 68, capacitor C 102, capacitor C 69, capacitor C 67, capacitor C 61, capacitor C 60, capacitor C 55, capacitor C 62, capacitor C 58, capacitor C 54, capacitor C 56, capacitor C 57, triode Q23, with triode Q22, triode Q21, earphone base J6, hands-free wheat MIC2, handle wheat MIC1, earphone wheat switch, hands-free wheat switch and handle wheat switch; Described earphone wheat switch was by resistance R 113 minutes three tunnel, lead up to capacitor C 68 to ground, the resistance R 112 of leading up to arrives the 4th pin of earphone base J6, one the tunnel successively by resistance R 99, the base stage of resistance R 160 to triode Q23, triode Q23 collector electrode one road is connected to the tie point of resistance R 160 and resistance R 99, one the tunnel successively by capacitor C 69, resistance R 114 is sent into phone MCU, triode Q23 launching base is connected to ground, earphone base J6 the 4th pin is also by capacitor C 102, the base stage of resistance R 158 to triode Q23, one end ground connection of capacitor C 67, the 4th pin of other end lug support J6, earphone base J6 the 5th pin arrives ground by resistance R 154; Described hands-free wheat switch was by resistance R 104 minutes three tunnel, lead up to capacitor C 61 to ground, lead up to resistance R 103 and resistance R 110 to hands-free wheat MIC2 anode, lead up to resistance R 97, the base stage of resistance R 161 to triode Q22, triode Q22 collector electrode one road is connected to the tie point of resistance R 161 and resistance R 97, one the tunnel successively by capacitor C 62, resistance R 105 is sent into phone MCU, triode Q22 launching base is connected to ground, the anode of hands-free wheat MIC2 is also by resistance R 110, capacitor C 55, the base stage of resistance R 95 to triode Q22, capacitor C 60 1 end ground connection, the other end are by the anode of resistance R 110 to hands-free wheat MIC2, and the negative terminal of hands-free wheat MIC2 arrives ground by resistance R 65; Described handle wheat switch was by resistance R 101 minutes three tunnel, lead up to capacitor C 58 to ground, lead up to resistance R 98 to handle wheat MIC1 anode, one the tunnel successively by resistance R 94, the base stage of resistance R 162 to triode Q21, triode Q21 collector electrode one road is connected to the tie point of resistance R 162 and resistance R 94, lead up to capacitor C 56, resistance R 96 is sent into phone MCU, the launching base of triode Q21 is connected to ground, handle wheat MIC1 is also by capacitor C 57, the base stage of resistance R 1 to triode Q21, capacitor C 54 1 end ground connection, other end catcher handle wheat MIC1 anode, handle wheat negative terminal is to ground.
A kind of binaural recording method based on intelligent telegraphone is applicable to the binaural recording equipment based on intelligent telegraphone as claimed in claim 3, it is characterized in that:
Step 1: talked about circuit and microphone by the PSTN outside line of mutual isolation and send the words circuit to obtain analog signal;
Step 2: the PSTN outside line is talked about obtains first digital audio and video signals after line signal is changed by AD;
Step 3: send the words partial circuit that first digital audio and video signals is carried out sending into phone MCU behind the isolation of light lotus root and the amplifying signal;
Step 4: microphone obtains second digital audio and video signals after sending the words line signal by the AD conversion;
Step 5: talked about partial circuit and send into phone MCU after with the second digital audio and video signals amplifying signal;
Step 6: second digital audio and video signals and first digital audio and video signals that phone MCU will separate are mixed into the dual track data;
Step 7: phone MCU writes storage card with mixed dual track data output.
The present invention has adopted the signal isolation that will send words and be talked about, the mode of sampling respectively, strengthened acoustical quality, simultaneously also convenient sound to different sound channels amplify, audio operation such as variation, can also send words or talked about wherein a part of the interference under the bigger situation, make the tonequality of another part that better preserve be arranged, can play conclusive application to the field of needs such as finance, law evidence obtainings, stop prior art and be subjected to environmental interference influence greatly, the record problem of lower tone.
Substantial effect of the present invention is: the present invention is simple in structure, easy to use, cost is lower, the present invention has adopted the signal that will send words and be talked about to isolate, Cai Yang mode respectively, strengthened acoustical quality, also convenient sound to different sound channels amplifies simultaneously, audio operations such as variation, can also send words or talked about wherein a part of the interference under the bigger situation, make the tonequality of another part that better preserve be arranged, can be to finance, conclusive application is played in the field of needs such as law evidence obtaining, has stopped prior art and influenced greatly by environmental interference, the problem of recording lower tone.
Description of drawings
Fig. 1 is the structural representation block diagram of binaural recording equipment among the present invention;
Fig. 2 is the circuit theory schematic diagram that send the words partial circuit among the present invention;
Fig. 3 is the circuit theory schematic diagram of being talked about partial circuit among the present invention;
Fig. 4 be can only telegraphone among the present invention circuit block diagram.
Embodiment
Below by specific embodiment, and by reference to the accompanying drawings, technical scheme of the present invention is described in further detail.
Embodiment:
A kind of binaural recording equipment based on intelligent telegraphone is (referring to accompanying drawing 1, Fig. 4), comprise that the PSTN outside line talked about circuit, microphone send the words circuit, phone MCU, the AD modular converter, it is characterized in that: also comprise first separate channels, second separate channels, send the words partial circuit and talked about partial circuit, the input of described first separate channels is talked about circuit by the AD modular converter with the PSTN outside line and is connected, the input of described second separate channels send the words circuit to be connected by AD modular converter and microphone, the described input of words partial circuit that send is connected with the output of described first separate channels, the described output of words partial circuit that send is connected with described phone MCU input/output port, the described input of being talked about partial circuit is connected with the output of described second separate channels, the described output of being talked about partial circuit is connected with the input/output port of described phone MCU, describedly send the words partial circuit that circuit and microphone are talked about in the PSTN outside line to send the words circuit to separate, the first separate channels content is carried out independent sample send into phone MCU, the described partial circuit of being talked about send the words circuit to be talked about circuit with the PSTN outside line and separate microphone, the second separate channels content is carried out independent sample send into phone MCU, phone MCU carries out the content of first separate channels and the sampled signal of second separate channels to be merged into binaural recording after the AD conversion, realizes the analysis and utilization to audio file.The described words partial circuits (referring to accompanying drawing 2) that send comprising: input power supply VCC2, input AUOUT, capacitor C 29, resistance R 63, resistance R 64, resistance R 66, optocoupler U3, triode Q14 and optocoupler U23, delivery outlet VPH, input MAUIN, resistance R 29, resistance R 67, resistance R 69 capacitor C 26 and triode Q20; Described input power supply VCC2 is successively by resistance R 63, capacitor C 29 ground connection, power supply VCC2 is also successively by resistance R 63, resistance R 64, resistance R 66 is connected with input AUOUT with capacitor C 30, power supply VCC2 also is connected with the control input end of optocoupler U3, the control output end of optocoupler U3 is connected with the control input end of optocoupler U23, first output of optocoupler U3 is connected with input AUOUT with capacitor C 30 by resistance R 66 successively, second output head grounding of optocoupler U3, first output of optocoupler U3 also is connected with the base stage of triode Q14, the grounded emitter of triode Q14, the collector electrode of triode Q14 is connected with the control output end of optocoupler U23, first output of optocoupler U23 is connected with the base stage of triode Q20, first output of optocoupler U23 also is connected with the collector electrode of triode Q20 by resistance R 69, second output of optocoupler U23 and the emitter of triode Q20, the grounded emitter of triode Q20, the collector electrode of triode Q20 is successively by resistance R 67 and capacitor C 26 ground connection, the collector electrode of triode Q20 is successively by resistance R 67, resistance R 29 is connected with delivery outlet VPH, the collector electrode of triode Q20 also is connected with input MAUIN, described triode Q20 and triode Q14 are the NPN pipe, input MAUIN send the words circuit to be connected by AD modular converter and microphone, delivery outlet VPH is electrically connected with described phone MCU, and input AUOUT is talked about circuit by the AD modular converter with the PSTN outside line and is connected.The described partial circuit (referring to accompanying drawing 3) of being talked about comprising: resistance R 113, resistance R 112, resistance R 99, resistance R 158, resistance R 160, resistance R 114, resistance R 154, resistance R 104, resistance R 97, resistance R 103, R110, resistance R 65, resistance R 95, resistance R 161, resistance R 105 capacitor C 68, capacitor C 102, capacitor C 69, capacitor C 67, capacitor C 61, capacitor C 60, capacitor C 55, capacitor C 62, capacitor C 58, capacitor C 54, capacitor C 56, capacitor C 57, triode Q23, with triode Q22, triode Q21, earphone base J6, hands-free wheat MIC2, handle wheat MIC1, earphone wheat switch, hands-free wheat switch and handle wheat switch; Described earphone wheat switch was by resistance R 113 minutes three tunnel, lead up to capacitor C 68 to ground, the resistance R 112 of leading up to arrives the 4th pin of earphone base J6, one the tunnel successively by resistance R 99, the base stage of resistance R 160 to triode Q23, triode Q23 collector electrode one road is connected to the tie point of resistance R 160 and resistance R 99, one the tunnel successively by capacitor C 69, resistance R 114 is sent into phone MCU, triode Q23 launching base is connected to ground, earphone base J6 the 4th pin is also by capacitor C 102, the base stage of resistance R 158 to triode Q23, one end ground connection of capacitor C 67, the 4th pin of other end lug support J6, earphone base J6 the 5th pin arrives ground by resistance R 154; Described hands-free wheat switch was by resistance R 104 minutes three tunnel, lead up to capacitor C 61 to ground, lead up to resistance R 103 and resistance R 110 to hands-free wheat MIC2 anode, lead up to resistance R 97, the base stage of resistance R 161 to triode Q22, triode Q22 collector electrode one road is connected to the tie point of resistance R 161 and resistance R 97, one the tunnel successively by capacitor C 62, resistance R 105 is sent into phone MCU, triode Q22 launching base is connected to ground, the anode of hands-free wheat MIC2 is also by resistance R 110, capacitor C 55, the base stage of resistance R 95 to triode Q22, capacitor C 60 1 end ground connection, the other end are by the anode of resistance R 110 to hands-free wheat MIC2, and the negative terminal of hands-free wheat MIC2 arrives ground by resistance R 65; Described handle wheat switch was by resistance R 101 minutes three tunnel, lead up to capacitor C 58 to ground, lead up to resistance R 98 to handle wheat MIC1 anode, one the tunnel successively by resistance R 94, the base stage of resistance R 162 to triode Q21, triode Q21 collector electrode one road is connected to the tie point of resistance R 162 and resistance R 94, lead up to capacitor C 56, resistance R 96 is sent into phone MCU, the launching base of triode Q21 is connected to ground, handle wheat MIC1 is also by capacitor C 57, the base stage of resistance R 1 to triode Q21, capacitor C 54 1 end ground connection, other end catcher handle wheat MIC1 anode, handle wheat negative terminal is to ground.
A kind of binaural recording method based on intelligent telegraphone is applicable to the described binaural recording equipment based on intelligent telegraphone of embodiment,
Step 1: talked about circuit and microphone by the PSTN outside line of mutual isolation and send the words circuit to obtain analog signal;
Step 2: the PSTN outside line is talked about obtains first digital audio and video signals after line signal is changed by AD;
Step 3: send the words partial circuit that first digital audio and video signals is carried out sending into phone MCU behind the isolation of light lotus root and the amplifying signal;
Step 4: microphone obtains second digital audio and video signals after sending the words line signal by the AD conversion;
Step 5: talked about partial circuit and send into phone MCU after with the second digital audio and video signals amplifying signal;
Step 6: second digital audio and video signals and first digital audio and video signals that phone MCU will separate are mixed into the dual track data;
Step 7: phone MCU writes storage card with mixed dual track data output.
Wherein step 2 and step 4 are the step of carrying out synchronously, and step 2 and step 3 are the order execution in step, and step 4 and step 5 are the order execution in step, and step 4 and step 5 are the order execution in step; When step 5 and step 3 are all complete, execution in step six.
Above-described embodiment is a kind of preferable scheme of the present invention, is not that the present invention is done any pro forma restriction, also has other variant and remodeling under the prerequisite that does not exceed the technical scheme that claim puts down in writing.
Claims (4)
1. binaural recording equipment based on intelligent telegraphone, comprise that the PSTN outside line talked about circuit, microphone send the words circuit, phone MCU, the AD modular converter, it is characterized in that: also comprise first separate channels, second separate channels, send the words partial circuit and talked about partial circuit, the input of described first separate channels is talked about circuit by the AD modular converter with the PSTN outside line and is connected, the input of described second separate channels send the words circuit to be connected by AD modular converter and microphone, the described input of words partial circuit that send is connected with the output of described first separate channels, the described output of words partial circuit that send is connected with described phone MCU input/output port, the described input of being talked about partial circuit is connected with the output of described second separate channels, the described output of being talked about partial circuit is connected with the input/output port of described phone MCU, describedly send the words partial circuit that circuit and microphone are talked about in the PSTN outside line to send the words circuit to separate, the first separate channels content is carried out independent sample send into phone MCU, the described partial circuit of being talked about send the words circuit to be talked about circuit with the PSTN outside line and separate microphone, the second separate channels content is carried out independent sample send into phone MCU, phone MCU carries out the content of first separate channels and the sampled signal of second separate channels to be merged into binaural recording after the AD conversion, realizes the analysis and utilization to audio file.
2. according to the described binaural recording equipment based on intelligent telegraphone of claim 1, it is characterized in that: the described words partial circuit that send comprises: input power supply VCC2, input AUOUT, capacitor C 29, resistance R 63, resistance R 64, resistance R 66, optocoupler U3, triode Q14 and optocoupler U23, delivery outlet VPH, input MAUIN, resistance R 29, resistance R 67, resistance R 69 capacitor C 26 and triode Q20; Described input power supply VCC2 is successively by resistance R 63, capacitor C 29 ground connection, power supply VCC2 is also successively by resistance R 63, resistance R 64, resistance R 66 is connected with input AUOUT with capacitor C 30, power supply VCC2 also is connected with the control input end of optocoupler U3, the control output end of optocoupler U3 is connected with the control input end of optocoupler U23, first output of optocoupler U3 is connected with input AUOUT with capacitor C 30 by resistance R 66 successively, second output head grounding of optocoupler U3, first output of optocoupler U3 also is connected with the base stage of triode Q14, the grounded emitter of triode Q14, the collector electrode of triode Q14 is connected with the control output end of optocoupler U23, first output of optocoupler U23 is connected with the base stage of triode Q20, first output of optocoupler U23 also is connected with the collector electrode of triode Q20 by resistance R 69, second output of optocoupler U23 and the emitter of triode Q20, the grounded emitter of triode Q20, the collector electrode of triode Q20 is successively by resistance R 67 and capacitor C 26 ground connection, the collector electrode of triode Q20 is successively by resistance R 67, resistance R 29 is connected with delivery outlet VPH, the collector electrode of triode Q20 also is connected with input MAUIN, described triode Q20 and triode Q14 are the NPN pipe, input MAUIN send the words circuit to be connected by AD modular converter and microphone, delivery outlet VPH is electrically connected with described phone MCU, and input AUOUT is talked about circuit by the AD modular converter with the PSTN outside line and is connected.
3. according to claim 1 or 2 described binaural recording equipment based on intelligent telegraphone, it is characterized in that: the described partial circuit of being talked about comprises: resistance R 113, resistance R 112, resistance R 99, resistance R 158, resistance R 160, resistance R 114, resistance R 154, resistance R 104, resistance R 97, resistance R 103, R110, resistance R 65, resistance R 95, resistance R 161, resistance R 105 capacitor C 68, capacitor C 102, capacitor C 69, capacitor C 67, capacitor C 61, capacitor C 60, capacitor C 55, capacitor C 62, capacitor C 58, capacitor C 54, capacitor C 56, capacitor C 57, triode Q23, with triode Q22, triode Q21, earphone base J6, hands-free wheat MIC2, handle wheat MIC1, earphone wheat switch, hands-free wheat switch and handle wheat switch; Described earphone wheat switch was by resistance R 113 minutes three tunnel, lead up to capacitor C 68 to ground, the resistance R 112 of leading up to arrives the 4th pin of earphone base J6, one the tunnel successively by resistance R 99, the base stage of resistance R 160 to triode Q23, triode Q23 collector electrode one road is connected to the tie point of resistance R 160 and resistance R 99, one the tunnel successively by capacitor C 69, resistance R 114 is sent into phone MCU, triode Q23 launching base is connected to ground, earphone base J6 the 4th pin is also by capacitor C 102, the base stage of resistance R 158 to triode Q23, one end ground connection of capacitor C 67, the 4th pin of other end lug support J6, earphone base J6 the 5th pin arrives ground by resistance R 154; Described hands-free wheat switch was by resistance R 104 minutes three tunnel, lead up to capacitor C 61 to ground, lead up to resistance R 103 and resistance R 110 to hands-free wheat MIC2 anode, lead up to resistance R 97, the base stage of resistance R 161 to triode Q22, triode Q22 collector electrode one road is connected to the tie point of resistance R 161 and resistance R 97, one the tunnel successively by capacitor C 62, resistance R 105 is sent into phone MCU, triode Q22 launching base is connected to ground, the anode of hands-free wheat MIC2 is also by resistance R 110, capacitor C 55, the base stage of resistance R 95 to triode Q22, capacitor C 60 1 end ground connection, the other end are by the anode of resistance R 110 to hands-free wheat MIC2, and the negative terminal of hands-free wheat MIC2 arrives ground by resistance R 65; Described handle wheat switch was by resistance R 101 minutes three tunnel, lead up to capacitor C 58 to ground, lead up to resistance R 98 to handle wheat MIC1 anode, one the tunnel successively by resistance R 94, the base stage of resistance R 162 to triode Q21, triode Q21 collector electrode one road is connected to the tie point of resistance R 162 and resistance R 94, lead up to capacitor C 56, resistance R 96 is sent into phone MCU, the launching base of triode Q21 is connected to ground, handle wheat MIC1 is also by capacitor C 57, the base stage of resistance R 1 to triode Q21, capacitor C 54 1 end ground connection, other end catcher handle wheat MIC1 anode, handle wheat negative terminal is to ground.
4. the binaural recording method based on intelligent telegraphone is applicable to the binaural recording equipment based on intelligent telegraphone as claimed in claim 3, it is characterized in that:
Step 1: talked about circuit and microphone by the PSTN outside line of mutual isolation and send the words circuit to obtain analog signal;
Step 2: the PSTN outside line is talked about obtains first digital audio and video signals after line signal is changed by AD;
Step 3: send the words partial circuit that first digital audio and video signals is carried out sending into phone MCU behind the isolation of light lotus root and the amplifying signal;
Step 4: microphone obtains second digital audio and video signals after sending the words line signal by the AD conversion;
Step 5: talked about partial circuit and send into phone MCU after with the second digital audio and video signals amplifying signal;
Step 6: second digital audio and video signals and first digital audio and video signals that phone MCU will separate are mixed into the dual track data;
Step 7: phone MCU writes storage card with mixed dual track data output.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201374752Y (en) * | 2008-12-09 | 2009-12-30 | 北京歌尔泰克科技有限公司 | Bidirectional sound separating and collecting device of telephone |
| CN101778185A (en) * | 2009-01-13 | 2010-07-14 | 联芯科技有限公司 | On-line recording method and device of mobile terminal |
| JP2013070285A (en) * | 2011-09-22 | 2013-04-18 | Nec Corp | Microphone and microphone system |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201374752Y (en) * | 2008-12-09 | 2009-12-30 | 北京歌尔泰克科技有限公司 | Bidirectional sound separating and collecting device of telephone |
| CN101778185A (en) * | 2009-01-13 | 2010-07-14 | 联芯科技有限公司 | On-line recording method and device of mobile terminal |
| JP2013070285A (en) * | 2011-09-22 | 2013-04-18 | Nec Corp | Microphone and microphone system |
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