CN202260046U - Audio-data interface adapter device and audio-data signal conversion system - Google Patents
Audio-data interface adapter device and audio-data signal conversion system Download PDFInfo
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- CN202260046U CN202260046U CN2011202622631U CN201120262263U CN202260046U CN 202260046 U CN202260046 U CN 202260046U CN 2011202622631 U CN2011202622631 U CN 2011202622631U CN 201120262263 U CN201120262263 U CN 201120262263U CN 202260046 U CN202260046 U CN 202260046U
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Abstract
The utility model relates to an audio-data interface adapter device and an audio-data signal conversion system. The audio-data interface adapter device comprises a USB (Universal Serial Bus) data interface, an audio plug and a first modem module. The first modem module is used for modulating data information from the USB data interface, transmitting the data information to an MIC (Microphone) pole of the audio plug, demodulating signals from a first channel pole of the audio jack to obtain data information, and then transmitting the data information to the USB data interface. Due to the universal audio interface plug and the universal USB data interface, the audio-data interface adapter device has strong universality and applicability and can support communication terminals with an audio interface, such as mobile phones, flat-panel computers, PDA (Personal Digital Assistants) or PC (Personal Computers) as well as mobile data devices with the universal USB interface, such as USB flash disks, USB Key and the like. The scope of application of USB devices can be expanded to the largest extent, and mobile communication terminals can share common USB mobile data devices, such as the USB Key.
Description
Technical field
The utility model relates to the communications field, more particularly, relates to a kind of audio frequency-data-interface switching device and audio frequency-data-signal converting system.
Background technology
Mobile communication terminal products such as mobile phone, panel computer, PDA lack general USB interface at present; Therefore the digital certificate security lock arrangements with USB interface (being USB Key or U shield) that on PC (PC), generally use etc. use USB interface hardware independently digital certificate and signature algorithm technology, can't on this type of mobile communication terminal, use.
Be installed on the Internet bank's software on the part mobile communication terminal owing to there is not independently safety key of hardware, made its transaction security reduce, function reduces.Along with the enhancing of mobile communication terminal function, they have faced the similar hacker attacks of PC, document certificate and security risk such as have lost, independently, general hardware digital certificate equipment and AES become particularly important.Same problem also appears at secure log is existed in the applied environment of strong demand, and is online etc. like enterprise VPN, Alipay, Net silver.
In the present above-mentioned application, like the Web bank on PC inquiry and transaction software, the USB KEY that generally adopts for security reason carries out digital certificate store, signature and summary computing as hardware unit independently.Along with the mobile communication terminal user popularity rate improves rapidly, the mobile phone users total amount will be considerably beyond the number of users that has PC.Each bank and enterprise are that mobile communication terminal user has been developed special-purpose mobile communication terminal software, but mobile communication terminal can not use ripe independent digit certificate hardware products such as USB KEY, and fail safe still can not get guaranteeing.
The USB KEY that Web bank generally adopts at present needs main equipment (PC etc.) to have USB interface, and can install driver, and in fact perhaps so-called free drive USB KEY has shared the above operating system HID interface driving of WINDOWS XP.Intelligent communications terminal or other personal hand-held communication terminals generally do not have USB interface, and the built-in driving of " free drive " prerequisite of suitable USB KEY more can not be arranged.But PC, communication terminal or personal hand-held communication terminal all have the COBBAIF that has earphone and MIC; Therefore need exploitation a kind of audio frequency-data-interface switching device; Cooperate uses such as USB KEY, make it can be not with USB interface but mobile communication terminal secure log Web banks such as mobile phone or other with COBBAIF need carry out the application of authentication.
The utility model content
The technical problem that the utility model will solve is, to many communication terminals of prior art USB interface is not set, and the defective that can't use product such as prior USB KEY to carry out the digital certificate checking provides a kind of audio frequency-data-interface switching device.
Another technical problem that the utility model will solve is, to many communication terminals of prior art USB interface is not set, and can't use prior USB KEY to carry out the defective of digital certificate checking, and a kind of audio frequency-data-signal converting system is provided.
The utility model solves the technical scheme that its technical problem adopted: construct a kind of audio frequency-data-interface switching device, comprising:
Audio jack, it has the MIC utmost point and the first sound channel utmost point;
The usb data interface; And
Be used for modulating and be sent to the MIC utmost point of said audio jack from the data message of said usb data interface and being used for the signal from the first sound channel utmost point of said audio jack is carried out demodulation to obtain the first modulation module that is sent to said usb data interface behind the data message.
In the described audio frequency of the utility model-data-interface switching device; The said first modulation module comprises with said usb data interface communication and links to each other, is used to carry out the first communication microcontroller that the Code And Decode of audio signal is handled; And ac-coupled circuit and low-pass filter circuit; Wherein, The output of the said first communication microcontroller is connected in the MIC utmost point of said audio jack through low-pass filter circuit, and the input of the said first communication microcontroller is connected in the first sound channel utmost point of said audio jack through ac-coupled circuit.
In the described audio frequency of the utility model-data-interface switching device; The said first modulation module comprises with said usb data interface communication and links to each other, is used to carry out the first communication microcontroller and first digital to analog converter that the Code And Decode of audio signal is handled; Wherein, The output of the said first communication microcontroller is connected in the MIC utmost point of said audio jack through said first digital to analog converter, and the input of the said first communication microcontroller is connected in the first sound channel utmost point of said audio jack.
In the described audio frequency of the utility model-data-interface switching device; The said first modulation module also comprises first analog to digital converter, and the input of the said first communication microcontroller is connected in the first sound channel utmost point of said audio jack through said first analog to digital converter.
In the described audio frequency of the utility model-data-interface switching device, also comprise the electric supply installation that is used to said audio frequency-data-interface switching device power supply.
In the described audio frequency of the utility model-data-interface switching device, said audio jack also has the second sound channel utmost point; Said electric supply installation comprises the electric weight gatherer that is built in said audio frequency-data-interface switching device and is connected in the said second sound channel utmost point.
In the described audio frequency of the utility model-data-interface switching device, said electric supply installation comprises the battery that is built in said audio frequency-data-interface switching device.
In the described audio frequency of the utility model-data-interface switching device, said usb data interface is a USB socket.
In the described audio frequency of the utility model-data-interface switching device, said audio jack is integral type headset plug or split type MIC plug and headset plug; Said audio jack is the audio jack of 2.5mm or 3.5mm.
The utility model solves another technical scheme that its technical problem adopted: construct a kind of audio frequency-data-signal converting system, comprising:
Foregoing audio frequency-data-interface switching device;
The communication terminal that has COBBAIF and communication module, said communication terminal are provided with the second modulation module of the modulation that is used to carry out audio signal;
Wherein, the said audio jack of said audio frequency-data-interface switching device is communicated by letter with the COBBAIF of said communication terminal and is connected; The said usb data interface of said audio frequency-data-interface switching device is used for being connected with the USB interface devices communicating with usb data interface, and the said second modulation module comprises: being arranged on being used on the said communication terminal carries out the second communication microcontroller that the Code And Decode of audio signal is handled; Perhaps be integrated in the second encode/decode audio signal module on the said communication terminal; Wherein, said USB interface equipment is the digital certificate security lock arrangement with USB interface.
Implement the utility model; Has following beneficial effect: because the audio frequency-data-interface switching device of the utility model has universal audio interface plug and usb data interface; Cooperate uses such as USB KEY, make the communication terminal of not being with USB interface but having COBBAIF, like mobile phone, panel computer, PDA or PC etc.; Can secure log Web bank, for user and industry bring great convenience.
Description of drawings
To combine accompanying drawing and embodiment that the utility model is described further below, in the accompanying drawing:
Fig. 1 is the structural representation of the utility model audio frequency-data-interface switching device;
Fig. 2 A is the structural representation of first embodiment of the utility model audio frequency-data-interface switching device;
Fig. 2 B is the structural representation of second embodiment of the utility model audio frequency-data-interface switching device;
Fig. 3 A is the structural representation of the 3rd embodiment of the utility model audio frequency-data-interface switching device;
Fig. 3 B is the structural representation of the 4th embodiment of the utility model audio frequency-data-interface switching device;
Fig. 4 is the structural representation of the utility model audio frequency-data-signal converting system;
Fig. 5 A is the structural representation of first application implementation example of the utility model audio frequency-data-signal converting system;
Fig. 5 B is the structural representation of second application implementation example of the utility model audio frequency-data-signal converting system;
Fig. 5 C is the structural representation of the 3rd application implementation example of the utility model audio frequency-data-signal converting system.
Embodiment
A kind of audio frequency-data-interface switching device (being called for short A-PORT) that has audio jack and usb data interface of the utility model design is so that make data-source device with usb data interface and the communication terminal that has COBBAIF can carry out data communication.For example cooperate uses such as USB KEY, make it can be not with USB interface but have the application such as mobile communication terminal secure log Web bank such as mobile phone of COBBAIF.
As shown in Figure 1, the audio frequency of the utility model-data-interface switching device 100 comprises usb data interface 10, the first modulation module 20 and audio jack 30.Audio jack 30 comprises Mike (MIC) utmost point 32 and the sound channel utmost point (for example a left side or the R channel utmost point) 34.In the utility model, as selection, audio jack 30 can be a headset integral type plug.As another selection, audio jack 30 also can be the split type plug that headset plug separates with Mike (MIC) plug.The MIC utmost point 32 all is arranged on the same contact pin with a left side and/or the R channel utmost point on headset integral type plug, is isolated by insulating material each other.On split type plug, the MIC utmost point 32 is arranged on the MIC plug; A left side and/or the R channel utmost point are arranged on the headset plug, are isolated by insulating material each other.
In operation; The first modulation module 20 is used for being sent to the MIC utmost point 32 of audio jack after modulating from the data message of usb data interface 10; The MIC utmost point 32 with through audio jack spreads out of, and is used for that the signal from the sound channel utmost point 34 of audio jack is carried out demodulation and after obtaining data message, is sent to usb data interface 10.
Fig. 2 A is the structural representation of audio frequency-data-interface switching device 100A of the utility model first embodiment.Shown in Fig. 2 A, audio frequency-data-interface switching device 100A comprises usb data interface 10, the first modulation module 20, audio jack 30 and electric weight gatherer 52.The first modulation module 20 comprises the first communication microcontroller 22, low-pass filter circuit 24, ac-coupled circuit 26.Be provided with audio coding module 22a and audio decoder module 22b in the first communication microcontroller 22, be used to carry out the Code And Decode processing of audio signal.Audio jack 30 comprises the MIC utmost point 32, R channel utmost point 34a, L channel utmost point 34b.
Usb data interface 10 is connected with 22 communications of the first communication microcontroller.The output of the first communication microcontroller 22 is connected in the MIC utmost point 32, the first communication microcontrollers of audio jack through low-pass filter circuit 24 20 inputs are connected in the R channel utmost point 34a of audio jack 30 through ac-coupled circuit 26.Electric weight gatherer 52 is connected in the L channel utmost point 34b of audio jack 30, is used for obtaining electric energy from the communication terminal that is connected, so that be audio frequency-data-interface switching device power supply.
Need to prove; Though ac-coupled circuit 26 shown in Fig. 2 A is connected with R channel utmost point 34a; Electric weight gatherer 52 is connected with L channel utmost point 34b, but the utility model is not limited thereto, as substituting; Also can ac-coupled circuit 26 be connected with L channel utmost point 34b, electric weight gatherer 52 is connected with R channel utmost point 34a.Therefore can one of R channel utmost point 34a and L channel utmost point 34b be represented with the first sound channel utmost point, and another sound channel is represented with the second sound channel utmost point.
Fig. 2 B is the structural representation of the audio frequency-data-interface switching device 100B according to the utility model second embodiment.Be that remainder was identical with the structure of the audio frequency shown in Fig. 2 A-data-interface switching device 100A audio frequency-data-interface switching device was supplied power except adopting battery 54 to substitute electric weight gatherers 52 among Fig. 2 B.In addition, among the embodiment shown in Fig. 2 B, ac-coupled circuit 26 can be connected in the R channel utmost point, perhaps can be connected in the L channel utmost point, among Fig. 2 B R channel utmost point 34a or L channel utmost point 34b is referred to as the right side or the L channel utmost point 34.Also R channel utmost point 34a or L channel utmost point 34b are referred to as the right side or the L channel utmost point 34 among Fig. 1.
Fig. 3 A is the structural representation of audio frequency-data-interface switching device 100C of the utility model the 3rd embodiment.Different with Fig. 2 A illustrated embodiment is, in Fig. 3 A illustrated embodiment, low-pass filter circuit 24 is substituted by digital to analog converter (DAC) 23a, and ac-coupled circuit 26 is substituted by analog to digital converter (ADC) 23b.And remainder is identical with the structure of the audio frequency shown in Fig. 2 A-data-interface switching device 100A.
ADC 23b with dashed lines frame table shows that these parts are selectable unit (SU)s among Fig. 3 A, also can not use ADC 23b in other embodiments, and the input of the first communication microcontroller 22 is directly connected in the R channel utmost point 34a of audio jack 30.
Fig. 3 B is the structural representation of audio frequency-data-interface switching device 100D of the utility model the 4th embodiment.Different with Fig. 2 B illustrated embodiment is, in Fig. 3 B illustrated embodiment, low-pass filter circuit 24 is substituted by digital to analog converter (DAC) 23a, and ac-coupled circuit 26 is substituted by analog to digital converter (ADC) 23b.And remainder is identical with the structure of the audio frequency shown in Fig. 2 B-data-interface switching device 100B.
ADC 23b with dashed lines frame table shows that these parts are selectable unit (SU)s among Fig. 3 B, also can not use ADC 23b in other embodiments, and the input of the first communication microcontroller 22 is directly connected in the R channel utmost point 34a of audio jack 30.
Need to prove; Though all comprise built-in electric weight gatherer 52 or battery 54 among the embodiment shown in Fig. 2 A, 2B, 3A and the 3B; But; Know as is known to the person skilled in the art, audio frequency-data-interface switching device also can be supplied power by external power supply, and need not built-in electric weight gatherer 52 or battery 54.
In operating process; The audio jack of the audio frequency-data-interface switching device of the foregoing description is inserted in the COBBAIF of corresponding communication terminal; The other end patches corresponding USB device; After modulation, can send communication terminal (for example mobile phone, panel computer, personal digital assistant or desktop computer etc.) from the data message of USB device to, through the processing of the second modulation module that disposes in the communication terminal, the data message that obtains reducing.Relevant this point will combine Fig. 4, Fig. 5 A, Fig. 5 B and Fig. 5 C to be elaborated in the back.
Fig. 4 is the structural representation of the utility model audio frequency-data-signal converting system.As shown in Figure 5, audio frequency-data-signal converting system comprises audio frequency-data-interface switching device 100 (the for example audio frequency shown in Fig. 1-3B-data-interface switching device 100,100A, 100B, 100C and 100D), USB interface equipment 80 and COBBAIF communication apparatus 200.
In application process; The audio jack 30 of audio frequency-data-interface switching device 100 is connected (being that audio jack 30 is inserted in the COBBAIF communication apparatus 200) with 200 communications of COBBAIF communication apparatus; The usb data interface 10 of audio frequency-data-interface switching device 100 is connected with 80 communications of USB interface equipment (for example, in the USB socket of the USB plug of USB interface equipment 80 insertion usb data interface 10.
In the utility model, USB interface equipment 80 can be that digital certificate security lock arrangement (being USB Key) 80a with USB interface or other banks or enterprise use digital signature equipment.
Fig. 5 A is the structural representation of first application implementation example of the utility model audio frequency-data-signal converting system.In the embodiment shown in Fig. 5 A, audio frequency-data-signal converting system is applied to the authentication of digital certificate.Shown in Fig. 5 A, the digital certificate authentication system comprises audio frequency-data-interface switching device 100 (the for example audio frequency shown in Fig. 1-3B-data-interface switching device 100,100A, 100B, 100C and 100D), mobile communication terminal 200a, USB Key 80a, certificate server 300 and communication network 400.Wherein, Mobile communication terminal 200a comprises COBBAIF 202, the second modulation module 204 and communication module 206, and not shown but functional module that conventional mobile communication terminal had or device for example processor, memory, input/output unit etc.
In operating process; The audio jack 30 of audio frequency-data-interface switching device 100 is connected (being that audio jack 30 is inserted in the COBBAIF 202) with 202 communications of the COBBAIF of mobile communication terminal 200a; The usb data interface 10 of audio frequency-data-interface switching device 100 (for example USB socket) is connected with USB Key80a, and mobile communication terminal 200a is connected with certificate server 300 communications through communication network 400 via communication module 206.The second modulation module 204 is used for sending communication module 206 to after the audio signal demodulation process that receives from COBBAIF 202; And be used for the signal that receives from communication module 206 is carried out modulation treatment with the audio signal after obtaining encoding; Send audio frequency-data-interface switching device 100 to through COBBAIF 202 again; Audio frequency-data-interface switching device 100 with the signal demodulation after, finally send to USB Key 80a through USB interface.
Fig. 5 B is the structural representation of second application implementation example of the utility model audio frequency-data-signal converting system.In the embodiment shown in Fig. 5 B, audio frequency-data-signal converting system is applied to the authentication of digital certificate.Shown in Fig. 5 B, the digital certificate authentication system comprises audio frequency-data-interface switching device 100 (the for example audio frequency shown in Fig. 1-3B-data-interface switching device 100,100A, 100B, 100C and 100D), mobile communication terminal 200a, USB Key 80a, certificate server 300 and communication network 400.Wherein, Mobile communication terminal 200a comprises COBBAIF 202, be used to carry out the second communication microcontroller 204a and communication module 206 that the Code And Decode of audio signal is handled, and not shown but functional module that conventional mobile communication terminal had or device for example processor, memory, input/output unit etc.
In operating process; The audio jack 30 of audio frequency-data-interface switching device 100 is connected (being that audio jack 30 is inserted in the COBBAIF 202) with 202 communications of the COBBAIF of mobile communication terminal 200a; The usb data interface 10 of audio frequency-data-interface switching device 100 is connected with USB Key 80a, and mobile communication terminal 200 is connected with certificate server 300 communications through communication network 400 via communication module 206.After handling, the audio signal decoding that the second communication microcontroller 204a is used for that COBBAIF 202 is received sends communication module 206 to; And be used for the signal that receives from communication module 206 is carried out encoding process with the audio signal after obtaining encoding; Send audio frequency-data-interface switching device 100 to through COBBAIF 202 again; Audio frequency-data-interface switching device 100 with the signal demodulation after, finally send to USB Key 80a through USB interface.
Fig. 5 C is the structural representation of the 3rd application implementation example of the utility model audio frequency-data-signal converting system.In the embodiment shown in Fig. 5 C, audio frequency-data-signal converting system is applied to the authentication of digital certificate.Shown in Fig. 5 C, the digital certificate authentication system comprises audio frequency-data-interface switching device 100 (the for example audio frequency shown in Fig. 1-3B-data-interface switching device 100,100A, 100B, 100C and 100D), desktop computer 200b, certificate server 300 and communication network 400.Wherein, Desktop computer 200b comprises that COBBAIF is MIC interface 202a and earphone interface 202b, is used to carry out the second encode/decode audio signal module 204b and communication module 206 that the Code And Decode of audio signal is handled, and not shown but functional module that conventional computer had or device for example processor, memory, input/output unit etc.In the present embodiment, the audio jack of audio frequency-data-interface switching device 100 comprises isolated M IC plug 32 ' and headset plug 34 '.
In operating process; The audio jack of audio frequency-data-interface switching device 100 is communicated by letter with the COBBAIF of desktop computer 200b and is connected (being among MIC plug 32 ' the insertion MIC interface 202a, among headset plug 34 ' the insertion earphone interface 202b); The usb data interface 10 of audio frequency-data-interface switching device 100 is connected with USB Key 80a, and desktop computer 200b is connected with certificate server 300 communications through communication network 400 via communication module 206.The second encode/decode audio signal module 204b is used for sending communication module 206 to after the audio signal decoding processing that receives from MIC interface 202a; And be used for the signal that receives from communication module 206 is carried out encoding process with the audio signal after obtaining encoding; Send audio frequency-data-interface switching device 100 to through earphone interface 202b again; Audio frequency-data-interface switching device 100 with the signal demodulation after, finally send to USB Key 80a through USB interface.
In the utility model, USB interface equipment 80 can be that Universal USB Key 80a or other banks or enterprise use digital signature equipment.In the above-described embodiments, certificate server 300 is to be used for the professional server of the Internet bank, and it comprises the web of Internet bank server 302 and communicate with continuous application server 304 that application server 304 is connected with database 306 communications.In the application of the Internet bank, communication terminal device (for example desktop computer 200 ' or mobile communication terminal 200) is gone up needs to install corresponding Internet bank software.
Certificate server 300 also can be the certificate server of other purposes, carries out giving the correct time on software upgrading or the data and carry out the employed certificate server of authentication, enterprise VPN server, financial middleware server, e-commerce website login authentication server or the like in the website that the user who carries out certificate server that authentication uses, application software during personnel's Telnet parent company of the branch company database of for example transnational or geographical group company logins software supplier.
Need to prove that the mobile communication terminal 200a in Fig. 5 A and the 5B illustrated embodiment can be mobile terminals such as mobile phone, panel computer or personal digital assistant.In the embodiment of Fig. 5 B, the second communication microcontroller 204a also can be substituted by the second encode/decode audio signal module 204b.In the embodiment of Fig. 5 C, the second encode/decode audio signal module 204b also can be substituted by the second communication microcontroller 204a.
In addition, in each embodiment, audio jack is to select integral type headset plug or split type MIC plug to confirm with the audio interface type that headset plug need be looked the communication terminal that is connected.The selection of the specification of audio jack (for example 2.5mm or 3.5mm) also need be looked the audio interface type of the communication terminal that is connected and confirm.
Need to prove that also above-mentioned audio coding module 22a, audio decoder module 22b and the second encode/decode audio signal module 204b all can be realized by the combination of software, hardware, firmware or software and hardware.
For example, the encoding and decoding program that resides in above the first communication microcontroller of audio frequency-data-interface switching device realizes with the microcontroller programming language, resides in together in the code memory of microcontroller with other control flow.Also can design independently codec chip realization code decode algorithm.Audio coding decoding can adopt TI MSP430 series super low-power consumption microcontroller to realize.Utilize GPIO, timer and the comparator of microcontroller, can control GPIO output specific waveforms signal,, send the MIC utmost point to through obtaining being fit to the signal of voice-grade channel behind the LPF.The audio signal that the first sound channel utmost point sends is judged the up of waveform or decline through comparator, thereby through the Vcc/2 voltage ratio decoding is obtained 0 or 1 through arriving GPIO and the comparator of MSP430 after the AC coupled.
The function that is positioned at second communication controller of communication terminal equally also can realize with software, operates in cell phone software process the inside.Also can the communication terminal operating system module or the form of driving exist, reside in the operating system firmware storage area of communication terminal.The smart mobile phone that for example uses Android operating system obtains audio sample value through the AudioRecord class from the recording of the MIC utmost point, and the rising or the decoding that descends of the positive and negative and audio volume control through judging audio sample value obtain 0 or 1.Needing the position of output through judgement is the different frequency of 1 or 0 selection, utilizes sinusoidal wave function to calculate the corresponding PCM value of corresponding frequencies; The AudioTrack class of utilizing the Android platform to provide specifies L channel to play these PCM data.
In addition, communication module 206 can be wire communication module or wireless communication module, and communication network can be wireline communication network, cordless communication network, or the combination of wireline communication network and cordless communication network.
For helping to understand the utility model, below illustrate.
The utility model audio frequency-data-interface switching device (being called for short A-PORT) connects communication terminal through COBBAIF, connects USB digital signature equipment USB Key through the usb data interface.Through offering communication terminal banking software developer SDK (Software Development Kit; Be called for short SDK); The communication terminal software developer is through calling the function among the SDK; The data that this function will import into add that command word forms bit stream, sends to earphone output audio interface with bit stream signal then.The first communication microcontroller (MCU) reads the signal (optional MODEM modulation signal) of Manchester's code from the L channel (optional R channel) of audio frequency, and comparison judges 0 or 1 according to intermediate voltage, sends to USB Key as the USB dateout then.Communication MCU outputs to output signal on the usb data interface with USB Key and is encoded to Manchester signal (optional MODEM modulation signal) equally and outputs to Mike (MIC) interface through LPF.
Because the utility model audio frequency-data-interface switching device has been connected to the earphone output audio interface of communication terminal through COBBAIF; Therefore can read signal; With obtaining command word and order data behind the signal decoding; Send to USB Key through the usb data interface; Let it that order data is adopted known Message Digest 5 (for example MD5 or the SHA1) computing of making a summary, signature computing or 3-DES cryptographic calculation etc., then operation result is sent to the usb data interface, send to the MIC interface of COBBAIF after this switching device is modulated the result data that sends on the usb data interface then.SDK software above the communication terminal is with the result bits flow data above the MIC input interface; Offer the banking software installed on the communication terminal and use, the communication terminal banking software just can with pass through the transferring accounts of communication server processing transaction-based requirements that data behind the USB Key signature send to bank, remit money, function such as inquiry.
Specifically, the audio frequency-COBBAIF plug is arranged above the data-interface switching device can insert the COBBAIF of communication terminal; There is USB socket the other end, can insert USB digital signature equipment such as USB Key.During use audio jack inserted the COBBAIF of communication terminal; USB Key is inserted the usb data interface; On the communication terminal application software, select login then, the communication terminal banking software will send authentication request to certificate server, obtain the serial data response signal then; After the serial data response signal is encoded; The serial data response signal is sent to audio frequency-data-interface switching device, and audio frequency-data-interface switching device sends to USB Key through the usb data interface after to the audio decoder that receives, and USB Key is with bank's public key encryption and private key for user signature; Again the ciphering signature result is passed back to audio frequency-data-interface switching device through the usb data interface; Audio frequency-data-interface switching device sends back COBBAIF after the ciphering signature result is encoded, and the communication terminal banking software reads decoded operation result, sends to the certificate server of bank then.Bank's certificate server utilizes private key deciphering, and determines whether to be validated user, secure log completion so far after using user's public key verifications signature.Functions such as other transfer accounts, remit money, inquiry can be done similar safety verification and signature equally.
In the utility model, the main effect of the first communication microcontroller has 2 points: a) accomplish the modulation of audio signal to digital signal; B) digital signal is transmitted to the UART/USB/i2C/ data-interface.The requirement that for example sends over above the communication terminal is carried out the MD5 computing to one piece of data, and the communication microcontroller obtains audio signal from L channel, and is right according to the level ratio of signal, obtains 01 bit stream, sends to its USB port.USB KEY obtains the MD5 request instruction and wants the data of computing above the USB input, through the MD5 algorithm of inside solidification data are obtained the MD5 digest value.
For example; Audio coder will become 0,1 digital signal encoding the signal (20～20000 hertz) that can pass through the audio frequency of voice band line transmission; Digital signal can be encoded into the audio signal of Manchester's code, also can be encoded into Bell 202 MODEM (
Http:// en.wikipedia.org/wiki/Bell_202_modem) signal.The process of audio decoder is opposite.The coding and decoding algorithm can be a lot, like Manchester code, Morse code and the employed coding-decoding method of MODEM modulation that dials up on the telephone.
On communication terminal, also be provided with corresponding audio coder and audio decoder.For example, audio coder and audio decoder can be audio coding program and the audio decoder programs of on communication terminal, moving, and also can be the audio coding decoding programs that is solidificated on the communication terminal, can also be the audio codec audio frequency of making hardware.This encoder becomes 10 with 0, becomes 01 with 1, then 10,01 and so on data is sent to digital to analog converter, thereby arrives audio frequency-data-interface switching device through L channel.
Below provide the example that the user logins necessary process:
A) communication terminal sends logging request to logon server;
B) server returns a random digit " 123456789 ";
C) communication terminal obtains after this random digit its audio coder of giving the communication terminal end, and audio coder is encoded it, and is played to L channel;
D) the communication microcontroller of A-PORT obtains audio signal from L channel, and decoding obtains digital signal, and digital signal is sent in the USB output of data-interface;
E) the USB Key of the data-interface of A-PORT insertion carries out the encrypted private key computing to random digit " 123456789 ", and " 25d55ad283aa400af464c76d713c07ad " outputs to interface with operation result;
F) the communication microcontroller of A-PORT obtains the signature result from USB interface, with result's coding, and sends to the MIC interface;
G) the audio decoder software that moves in the communication terminal obtains audio signal above MIC, be decoded as numerical data " 25d55ad283aa400af464c76d713c07ad ", and these data are sent to logon server;
H) logon server obtains data " 25d55ad283aa400af464c76d713c07ad ", uses user's PKI to decipher, if successful decryption representes that so this user is exactly the user who states in the public key certificate, logins successfully.
To sum up; The utility model relates to the outer relay part (being audio frequency-data-interface switching device) of a kind of communication terminal; Can make prior USB equipment such as USB Key, be connected with mobile communication terminal, realize the hardware digital signature through the universal audio interface through these parts; Hardware security key independently when making mobile communication terminal can use USB Key to become operation such as login, payment, shopping reaches and the similar level of security of PC PC mobile communication terminal.
The utility model mainly solves the problem that present mobile communication terminal can't directly use the general USB device of PC.And relate to a kind of audio frequency-data-signal converting system that comprises this audio frequency-data-interface switching device.
The audio frequency of the utility model-data-interface switching device has universal audio interface plug and general usb data interface, and its versatility and applicability are strong, can support to have the communication terminal of COBBAIF; Like mobile phone, panel computer, PDA or PC; And the mobile data devices of Universal USB interface, like USB flash disk, USB Key etc., can at utmost expand the scope of application of USB device; Make communication terminal also can share general USB mobile data devices, like USB Key.
Claims (10)
1. audio frequency-data-interface switching device is characterized in that, comprising:
Audio jack, it has the MIC utmost point and the first sound channel utmost point;
The usb data interface; And
Be used for modulating and be sent to the MIC utmost point of said audio jack from the data message of said usb data interface and being used for the signal from the first sound channel utmost point of said audio jack is carried out demodulation to obtain the first modulation module that is sent to said usb data interface behind the data message.
2. audio frequency according to claim 1-data-interface switching device; It is characterized in that; The said first modulation module comprises with said usb data interface communication and links to each other, is used to carry out the first communication microcontroller that the Code And Decode of audio signal is handled; And ac-coupled circuit and low-pass filter circuit; Wherein, the output of the said first communication microcontroller is connected in the MIC utmost point of said audio jack through low-pass filter circuit, and the input of the said first communication microcontroller is connected in the first sound channel utmost point of said audio jack through ac-coupled circuit.
3. audio frequency according to claim 1-data-interface switching device; It is characterized in that; The said first modulation module comprises with said usb data interface communication and links to each other, is used to carry out the first communication microcontroller and first digital to analog converter that the Code And Decode of audio signal is handled; Wherein, The output of the said first communication microcontroller is connected in the MIC utmost point of said audio jack through said first digital to analog converter, and the input of the said first communication microcontroller is connected in the first sound channel utmost point of said audio jack.
4. audio frequency according to claim 3-data-interface switching device; It is characterized in that; The said first modulation module also comprises first analog to digital converter, and the input of the said first communication microcontroller is connected in the first sound channel utmost point of said audio jack through said first analog to digital converter.
5. according to each described audio frequency-data-interface switching device in the claim 1 to 4, it is characterized in that, also comprise the electric supply installation that is used to said audio frequency-data-interface switching device power supply.
6. audio frequency according to claim 5-data-interface switching device is characterized in that, said audio jack also has the second sound channel utmost point; Said electric supply installation comprises the electric weight gatherer that is built in said audio frequency-data-interface switching device and is connected in the said second sound channel utmost point.
7. audio frequency according to claim 5-data-interface switching device is characterized in that, said electric supply installation comprises the battery that is built in said audio frequency-data-interface switching device.
8. audio frequency according to claim 5-data-interface switching device is characterized in that, said usb data interface is a USB socket.
9. audio frequency according to claim 8-data-interface switching device is characterized in that, said audio jack is integral type headset plug or split type MIC plug and headset plug; Said audio jack is the audio jack of 2.5mm or 3.5mm.
10. audio frequency-data-signal converting system is characterized in that, comprising:
Like each described audio frequency-data-interface switching device in the claim 1 to 9;
The communication terminal that has COBBAIF and communication module, said communication terminal are provided with the second modulation module of the modulation that is used to carry out audio signal;
Wherein, the said audio jack of said audio frequency-data-interface switching device is communicated by letter with the COBBAIF of said communication terminal and is connected; The said usb data interface of said audio frequency-data-interface switching device is used for being connected with the USB interface devices communicating with usb data interface, and the said second modulation module comprises: being arranged on being used on the said communication terminal carries out the second communication microcontroller that the Code And Decode of audio signal is handled; Perhaps be integrated in the second encode/decode audio signal module on the said communication terminal; Wherein, said USB interface equipment is the digital certificate security lock arrangement with USB interface.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011202622631U CN202260046U (en) | 2011-07-22 | 2011-07-22 | Audio-data interface adapter device and audio-data signal conversion system |
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| CN2011202622631U CN202260046U (en) | 2011-07-22 | 2011-07-22 | Audio-data interface adapter device and audio-data signal conversion system |
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| CN202260046U true CN202260046U (en) | 2012-05-30 |
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| CN102805614A (en) * | 2012-08-16 | 2012-12-05 | 北京超思电子技术有限责任公司 | Medical detection device and system |
| CN103037045A (en) * | 2012-12-14 | 2013-04-10 | 钱袋网（北京）信息技术有限公司 | USBKEY voice frequency adaptor |
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| WO2013185610A1 (en) * | 2012-06-13 | 2013-12-19 | 天地融科技股份有限公司 | Audio signal transmission device |
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| CN102805614A (en) * | 2012-08-16 | 2012-12-05 | 北京超思电子技术有限责任公司 | Medical detection device and system |
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| CN103412630B (en) * | 2013-07-24 | 2016-12-07 | 陈志璋 | Utilize the method and apparatus that electronic equipment audio frequency interface realizes electric energy acquisition and communicates |
| CN105226472A (en) * | 2015-10-09 | 2016-01-06 | 北京大明五洲科技有限公司 | Audio switching device and security certification system |
| CN106327849A (en) * | 2016-08-29 | 2017-01-11 | 福建新大陆支付技术有限公司 | Data communication method based on mobile phone audio frequency |
| CN109117638A (en) * | 2018-07-13 | 2019-01-01 | 中国电子科技集团公司第三十研究所 | A kind of credible and secure mainboard of height and its control method based on physics switching |
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