CN102832968B - Method for performing communication between mobile phone and equipment by using audio interface - Google Patents
Method for performing communication between mobile phone and equipment by using audio interface Download PDFInfo
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- CN102832968B CN102832968B CN201210262449.6A CN201210262449A CN102832968B CN 102832968 B CN102832968 B CN 102832968B CN 201210262449 A CN201210262449 A CN 201210262449A CN 102832968 B CN102832968 B CN 102832968B
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Abstract
The invention relates to a method for performing communication between a mobile phone and equipment by using an audio interface, comprising the mobile phone, a two-way audio connecting line, a transformation module and the equipment; an encrypted digital signal is firstly packaged in the mobile phone and then is added with packet header; after being coded, the packaged digital signal is transformed into a digital audio signal; finally, the digital audio signal is transformed into an analog audio signal by DA (Digital-Analog) transformation; the delivered analog audio signal is transmitted to an equipment transformation module through the connecting line; the module is connected with the equipment; the transformation module also comprises the audio interface; after receiving the audio signal, the module processes the received signal through a control function in the module; the obtained analog audio signal is transformed into the digital audio signal by AD (Analog-Digital) transformation and then decoded into the digital signal; and after being unpacked, the obtained digital signal is supplied to the equipment. The method provided by the invention does not affect the traditional audio function, has low cost and is convenient to carry and use.
Description
Technical field
The present invention relates to carry out between a kind of mobile phone and equipment the method for communication, especially relate to a kind of method of utilizing audio interface to carry out communication between mobile phone and equipment.
Background technology
Along with the fast development of mechanics of communication and Internet technology, mobile phone is from progressively just-in-time, interactive, popular of single communication terminal.Mobile phone, as the emerging medium of one, is changing traditional information propagation pattern with its exclusive nature of media, is just day by day rooted in the hearts of the people.The configuration of mobile phone and outward appearance be also in Stepwise refinement and exquisiteness, and general mobile phone USB interface is at most only furnished with one or even there is no USB interface or be unworthy of data wire.When not having, USB interface or USB interface are occupied or while now thering is no data wire, the transmission that realize file just seems inconvenient, therefore needs a kind of alternative method of USB interface to realize the communication of mobile phone and other equipment.Certainly, this means of communication can realize too by USB interface.Mobile phone generally contains audio interface, has played function served as bridge between analog and digital signal, can transmitted in both directions analog signal.
Current existing Bluetooth function can be realized the information interaction between mobile phone and particular device (mobile phone, computer), but also has its limitation.During by Bluetooth transmission file to as if with mobile phone or the computer of the specific pairing of this mobile phone, and distance between them is in ten meters and ensure to be subject to the interference of other signals.Can cause the inconvenience in use, the data of some form can not be checked in time equally.
Summary of the invention
The present invention solves the existing technical problem of prior art; Provide one need to be in mobile phone or equipment built-in conversion chip, reduced a kind of method of utilizing audio interface to carry out communication between mobile phone and equipment of production and use cost.
It is to solve the existing technical problem of prior art that the present invention also has an object; A kind of communication tool mobile phone of employing is provided, be easy to carry, also do not cause the burden in expense, be easy to use simultaneously, do not need to find specific object and be decrypted pairing, a kind of practical method of utilizing audio interface to carry out communication between mobile phone and equipment.
Above-mentioned technical problem of the present invention is mainly solved by following technical proposals:
Utilize audio interface between mobile phone and equipment, to carry out a method for communication, it is characterized in that, comprise following selection step:
Select step 1, user is passed to cellphone information the communication step of equipment, specifically comprises:
Step 1.1, is used two way audio connecting line by the audio interface of mobile audio interface and modular converter
Be connected, the information that will transmit in selected mobile phone, will encrypt and pack and add that after digital signal encoding behind packet header becomes digital audio and video signals, converting corresponding analog audio data to again by DA sends modular converter to through connecting line at interior of mobile phone;
Step 1.2, is connected to equipment by modular converter, by the control identification of function in this modular converter
The header packet information of signal judges whether the affected further conversion process of the simulated audio signal to receiving, if do not need, goes to step 1.4;
Step 1.3, modular converter converts by AD the simulated audio signal obtaining to digital audio and video signals, then is converted into digital signal by decoding;
Step 1.4, modular converter sends final signal to coupled equipment;
Select step 2, user is passed to the information of equipment the communication step of mobile phone, specifically comprises:
Step 2.1, use two way audio connecting line that mobile audio interface is connected with the audio interface of modular converter, the information that will transmit in selected equipment, will encrypt and pack and add that after digital signal encoding behind packet header becomes digital audio and video signals, converting corresponding analog audio data to again by DA sends modular converter to through connecting line at device interior;
Step 2.2, is connected to mobile phone by modular converter, judges whether the affected further conversion process of simulated audio signal to receiving by the header packet information of the control identification of function signal in this modular converter, if do not need, goes to step 2.4;
Step 2.3, modular converter converts by AD the simulated audio signal obtaining to digital audio and video signals, then is converted into digital signal by decoding;
Step 2.4, modular converter sends final signal to coupled mobile phone.
In a kind of above-mentioned method of utilizing audio interface to carry out communication between mobile phone and equipment, the modular converter in described selection step 1 or selection step 2 is A/D modular converter
In a kind of above-mentioned method of utilizing audio interface to carry out communication between mobile phone and equipment, in described step 1.2 or step 2.2, the control module that described modular converter modular converter comprises coding/decoding modular converter and is connected with coding/decoding modular converter, described control module is as follows for the concrete grammar of the header packet information of identification signal: define the algorithm of the character string that does not appear at audio signal as packet header, whether control module has this specific packet header to identify this signal by detecting the signal spreading out of, and conventional audio signal does not have packet header; When the packet header signal that control module detects meets non-traditional audio signal, just need to carry out coding/decoding and A/D conversion to it, otherwise control module is directly reached equipment or mobile phone, does not do conversion process.
In a kind of above-mentioned method of utilizing audio interface to carry out communication between mobile phone and equipment, it is characterized in that: described header packet information comprises two kinds, its effect is in order to find and to carry out the starting point of digital data transmission faster, if do not have this header packet information to regard as conventional audio signal; Another kind is similar traditional packet header, comprise ID, control information (as every section audio size, parity check, whether retransmit, whether terminate transmission etc.), its effect is the reliability in order to ensure digital data transmission, for example between packet header, the length of signal is certain, is not correct signal if be less than this length.These two kinds is initial signal packet header and medium content packet header, definition:
Initial signal packet header: control module detects the starting point of digital data transmission by initial signal packet header, medium content packet header: comprise ID, control information, control information comprises every section audio size, strange
Even parity check, whether retransmit, whether terminate transmission etc.
It should be noted that, in described step 1.1 or step 2.1, encoding and decoding conversion between described digital signal and digital audio and video signals is to be realized by suitable algorithm, the decay in transmittance process of audio signal after conversion is unlikely previous digital signal is produced and lost.In the time that we will convert general digital document F to digital audio and video signals W and transmit, must meet 4 requirements: 1. can recover F completely from W; 2. the frequency range of W is not easy by the region of environmental interference in one as far as possible; 3. W is not easy by noise jamming, thereby reduces the probability retransmitting; 4. the coding size of W is as far as possible little in statistical significance, so that fast transmission.The process of this coding is as follows: 1. couple F converts (can be the common signal conversion such as FFT, small echo), makes it to be transformed into sequence Ti; 2. couple Ti carries out FM conversion and makes it to become Wi, the summation that final W is these Wi.Decode procedure is the inverse process of said process, and what it converted use is corresponding inverse transformation.
In a kind of above-mentioned method of utilizing audio interface to carry out communication between mobile phone and equipment, described two way audio connecting line comprises a kind of data wire that can connect mobile audio interface or USB interface and equipment interface, and what this connecting line transmitted is analog signal.In the time having the mode (as microphone and loudspeaker) of other signal transmission between transmission side and recipient, this connecting line can be economized, and by air transmission of audio signal, the loudspeaker of mobile phone terminal send audio signal, the microphone end received audio signal of equipment.
In a kind of above-mentioned method of utilizing audio interface to carry out communication between mobile phone and equipment, described equipment comprises a kind of or its combination in any in smart mobile phone, computer, printer, projecting apparatus.
Therefore, tool of the present invention has the following advantages: 1. need to be in mobile phone or equipment built-in conversion chip, reduced production and use cost; 2. the communication tool mobile phone adopting, is easy to carry, and does not also cause the burden in expense, is easy to use simultaneously, does not need to find specific object and is decrypted pairing, practical.
Brief description of the drawings
Fig. 1 is system configuration connection diagram of the present invention.
Fig. 2 is method flow diagram of the present invention.
Fig. 3 is the flow chart that information flow conversion of the present invention is processed.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, technical scheme of the present invention is described in further detail.
Embodiment:
As shown in drawings, the present invention includes mobile phone, two way audio connecting line, modular converter and equipment.Mobile phone is containing audio interface (microphone and earphone), and the modular converter that is connected to equipment by connecting line carries out signal with it mutual; At interior of mobile phone, first by the digital signal packing of encrypting, add packet header, after encoded again, convert packed digital signal to digital audio and video signals, finally convert digital audio and video signals to simulated audio signal by DA conversion, cataloged procedure from digital signal to digital audio and video signals is to be realized by suitable algorithm, make unlikely previous digital signal is produced of the decay of audio signal in transmittance process after conversion lose (for example adopt redundancy encoding, the object code of high and low frequency part is adopted to more redundancies); The simulated audio signal spreading out of is transferred to device translates module through connecting line, and this module is connected to equipment; Modular converter also contains audio interface, receive after audio signal, this module, by the control function in module, is processed to the received signal, judges the classification (being other signals that need to change or traditional audio signal) of signal according to the header packet information of signal; Need to change time, modular converter is changed by AD the simulated audio signal obtaining convert digital audio and video signals to, then is decoded as digital signal, after the digital signal obtaining is unpacked, offers equipment.Use conversely above-mentioned processing procedure, also can realize equipment end transmission data to mobile phone terminal.In the present embodiment, equipment is projecting apparatus, and mobile audio interface is connected with the audio interface of modular converter by connecting line, and modular converter is connected with projecting apparatus; The data that obtain transmitting from mobile phone, neither record to the data that receive because projecting apparatus does not have audio interface, so its information receiving needs modular converter to carry out conversion process to it, obtain corresponding data and just can be shown in projecting apparatus.
Be sent to projecting apparatus as example to realize image file between mobile phone and projecting apparatus below, introduce the information interaction of utilizing audio interface how to realize mobile phone and projecting apparatus,
Specifically comprise the following steps:
Step (1). mobile phone is connected to modular converter by two way audio connecting line from audio interface
Audio interface, the selected image file that will be sent to projecting apparatus, this file is stored in mobile phone EMS memory by after encrypting with the digital signal form of packing, software by interior of mobile phone has been encoded into digital audio and video signals, be converted into simulated audio signal by digital DA again, send to modular converter by audio interface.Step (2). modular converter is connected to projecting apparatus, and modular converter receives the simulated audio signal transmitting, and judges whether to change it by the header packet information of controlling identification of function signal.Because concrete equipment is projecting apparatus, this equipment does not use traditional sound-recording function, need to change the signal obtaining.Step (3). modular converter is changed by AD the simulated audio signal obtaining convert digital audio and video signals to, be converted into digital signal by decoding again, offer projecting apparatus, to make subsequent analysis (as view and admire picture or analyze medical image).
Wherein a kind of embodiment of encoding and decoding following (can analogize more complicated mode) in step (1):
1), to the simple windowing of F conversion (rectangular window, length is 2), if represent stop bits with E, we obtain
Totally 7 kinds of the digital fragment Ti arriving---00,01,10,11,0E, 1E and E;
2) by three kinds of frequencies, Ti is modulated into Wi, the frequency of employing is 200Hz, 300Hz and 500Hz, tool
Body modulator approach is as follows: 200Hz represents that 00,300Hz represents that 01,500Hz represents E, and 200Hz+300Hz represents that 10,200Hz+500Hz represents 0E, and 300Hz+500Hz represents 1E, and 200Hz+300Hz+500Hz represents 11.
The audio signal frequency scope of above-mentioned coding result is positioned at 200Hz to 3000Hz, the very suitable audio transmission that carries out.If in conjunction with the definition in packet header, can save the stop bits E of above-mentioned coding, make code efficiency higher.Decode procedure is a simple inverse process of said process.
It should be emphasized that, this coded system is only the one in those skilled in the art's many coded systems that can adopt, and does not get rid of and can adopt other coded system to carry out the coding of information.
What in step (2), we adopted add packet header signal and it is as follows to detect a kind of embodiment of packet header signal: be divided into two kinds: 1. for the definition in packet header of non-traditional audio signal, be before digital signal bag, to add 2K mute signal 0, every segment signal is that 2K 0 signal value adds characteristic value.In the time that control module starts detection signal, first runs into non-zero signal, and explanation is traditional audio frequency, does not change and directly delivers to equipment; If first runs into 0 signal, be likely we carry out signal transmission starting point in non-traditional mode, continue to detect K or more than K signal, if be all 0, this signal is the non-traditional audio signal that we will transmit backward; 2. for the packet header of signal that is in non-traditional transmission means, we carry out the definition in similar traditional packet header to it, comprise ID, control information (as every section audio size, parity check bit, whether retransmit, whether terminate transmission etc.), according to this header packet information, learn the every section of size of signal in transmission, form an interruption, continue to detect packet header backward, when containing termination transmission information (as very long one section of silence clip) in the control information in packet header, stop transmission.This method does not need to detect all signals, but jumping characteristic detects, and has realized the target of fast detecting.
Above step is the message transmitting procedure from mobile phone to equipment of introducing, and the present invention also can realize the message transmitting procedure from equipment to mobile phone, i.e. the inverse process of above-mentioned steps, and step is consistent, is not just repeating at this.
Adopt after this method, 1. need to be in mobile phone or equipment built-in conversion chip, reduced production and use cost; And mobile phone is popular communication tool, staff indispensability substantially, each mobile phone carries audio interface, is more convenient for promoting the method.2. the communication tool mobile phone that this method adopts, be easy to carry, do not cause the burden in expense yet, be easy to use simultaneously, do not need to find specific object and be decrypted pairing as bluetooth, make crowd of all kinds to collect in time desired data and be stored in mobile phone, then deliver to equipment needed thereby, practical.3. the device translates module that this method adopts, it is our innovation place, this module is used as switching signal, comprise control module, identify to the received signal (being need to change or traditional audio signal) by this module, the new method of a kind of mobile phone and equipment room communication was both provided, had not affected again traditional data transfer mode.4. this method is particularly suitable for the user of handset port deficiency, in the time that they need to use multiple interfaces transmission files to certain equipment, the method of utilizing audio interface to carry out mobile phone and device talk just provides a new communication path, in use do not need to possess again professional knowledge simultaneously, make the use of mobile phone more efficient, be worth higher, wider towards crowd.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendments or supplement or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Claims (6)
1. utilize audio interface between mobile phone and equipment, to carry out a method for communication, it is characterized in that, comprise following selection step:
Select step 1, user is passed to cellphone information the communication step of equipment, specifically comprises:
Step 1.1, use two way audio connecting line that mobile audio interface is connected with the audio interface of modular converter, the information that will transmit in selected mobile phone, will encrypt and pack and add that after digital signal encoding behind packet header becomes digital audio and video signals, converting corresponding analog audio data to again by DA sends modular converter to through connecting line at interior of mobile phone;
Step 1.2, is connected to equipment by modular converter, judges whether the affected further conversion process of simulated audio signal to receiving by the header packet information of the control identification of function signal in this modular converter, if do not need, goes to step 1.4;
Step 1.3, modular converter is changed by AD the simulated audio signal obtaining convert digital audio and video signals to, then is converted into digital signal by decoding;
Step 1.4, modular converter sends final signal to coupled equipment;
Select step 2, user is passed to the information of equipment the communication step of mobile phone, specifically comprises:
Step 2.1, use two way audio connecting line that mobile audio interface is connected with the audio interface of modular converter, the information that will transmit in selected equipment, will encrypt and pack and add that after digital signal encoding behind packet header becomes digital audio and video signals, converting corresponding analog audio data to again by DA sends modular converter to through connecting line at device interior;
Step 2.2, is connected to mobile phone by modular converter, judges whether the affected further conversion process of simulated audio signal to receiving by the header packet information of the control identification of function signal in this modular converter, if do not need, goes to step 2.4;
Step 2.3, modular converter is changed by AD the simulated audio signal obtaining convert digital audio and video signals to, then is converted into digital signal by decoding;
Step 2.4, modular converter sends final signal to coupled mobile phone;
Wherein, adding packet header signal and detecting a kind of embodiment of packet header signal of adopting is as follows: be divided into two kinds: 1. for the definition in packet header of non-traditional audio signal, be before digital signal bag, to add 2K mute signal 0, every segment signal is that 2K 0 signal value adds characteristic value; In the time that control module starts detection signal, first runs into non-zero signal, and explanation is traditional audio frequency, does not change and directly delivers to equipment; If first runs into 0 signal, be likely we carry out signal transmission starting point in non-traditional mode, continue to detect K or more than K signal, if be all 0, this signal is the non-traditional audio signal that we will transmit backward; 2. for the packet header of signal that is in non-traditional transmission means, we carry out the definition in similar traditional packet header to it, comprise ID, control information, according to this header packet information, learns the every section of size of signal in transmission, form an interruption, continue to detect packet header backward, when containing termination transmission information in the control information in packet header, stop transmission.
2. a kind of method of utilizing audio interface to carry out communication between mobile phone and equipment according to claim 1, is characterized in that, the modular converter in described selection step 1 or selection step 2 is A/D modular converter.
3. a kind of method of utilizing audio interface to carry out communication between mobile phone and equipment according to claim 1, it is characterized in that, in described step 1.2 or step 2.2, control function in modular converter is as follows for the concrete grammar of the header packet information of identification signal: define the algorithm of the character string that does not appear at audio signal as packet header, whether control module has this specific packet header to identify this signal by detecting the signal spreading out of, and conventional audio signal does not have packet header; When the packet header signal that control module detects meets non-traditional audio signal, just need to carry out coding/decoding and A/D conversion to it, otherwise control module is directly reached equipment or mobile phone, does not do conversion process.
4. a kind of method of utilizing audio interface to carry out communication between mobile phone and equipment according to claim 3, is characterized in that: described header packet information comprises two kinds of header packet informations, i.e. initial signal packet header and medium content packet header, and definition:
Initial signal packet header: control module detects the starting point of digital data transmission by initial signal packet header,
Medium content packet header: comprise ID, control information.
5. a kind of method of utilizing audio interface to carry out communication between mobile phone and equipment according to claim 1, it is characterized in that, described two way audio connecting line comprises a kind of data wire that can connect mobile audio interface or USB interface and equipment interface, and what this connecting line transmitted is analog signal.
6. a kind of method of utilizing audio interface to carry out communication between mobile phone and equipment according to claim 1, is characterized in that, described equipment comprises a kind of or its combination in any in smart mobile phone, computer, printer, projecting apparatus.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103200006B (en) * | 2013-02-18 | 2015-11-04 | 飞天诚信科技股份有限公司 | Communication means between a kind of terminal and external equipment and device |
| CN103473023A (en) * | 2013-09-17 | 2013-12-25 | 广州宽度信息技术有限公司 | Printing method and printing system transmitting data by using analog signals |
| TWI569200B (en) * | 2013-12-03 | 2017-02-01 | 三緯國際立體列印科技股份有限公司 | Printing system and data transmission method thereof |
| CN105024719B (en) * | 2014-04-23 | 2019-07-12 | 深圳市高盛科物联技术有限公司 | A kind of method and system by usb audio channel transmission data |
| CN105763291A (en) * | 2014-12-17 | 2016-07-13 | 天彩电子（深圳）有限公司 | High-speed digital communication method based on cellphone audio signal |
| CN105653237B (en) * | 2016-02-01 | 2019-03-22 | 宇龙计算机通信科技(深圳)有限公司 | Audio play control method, audio broadcasting control system and terminal |
| CN109788118A (en) * | 2017-11-13 | 2019-05-21 | 北京小米移动软件有限公司 | Information transceiving method and device |
| CN109788117A (en) * | 2017-11-13 | 2019-05-21 | 北京小米移动软件有限公司 | Information transceiving method and device storage medium |
| CN112954673B (en) * | 2021-02-03 | 2023-08-01 | 深圳市长丰影像器材有限公司 | Encryption method for wireless microphone channel |
| CN114004246A (en) * | 2021-12-06 | 2022-02-01 | 上海中通吉网络技术有限公司 | Mobile terminal equipment provided with portable bar code recognizer |
| CN114554384B (en) * | 2022-04-11 | 2024-03-12 | 深圳市得自在科技有限公司 | Bluetooth headset anti-interference performance test system |
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