CN103152130A - Method for transmitting encrypted voice by utilizing standard communication system - Google Patents
Method for transmitting encrypted voice by utilizing standard communication system Download PDFInfo
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- CN103152130A CN103152130A CN2013100510936A CN201310051093A CN103152130A CN 103152130 A CN103152130 A CN 103152130A CN 2013100510936 A CN2013100510936 A CN 2013100510936A CN 201310051093 A CN201310051093 A CN 201310051093A CN 103152130 A CN103152130 A CN 103152130A
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Abstract
The invention discloses a method for transmitting encrypted voice by utilizing a standard communication system, which comprises the following implementing steps of: carrying out conditioning amplification, analog-digital conversion, compression, channel coding, waveform coding and filtering on an analog voice signal picked by a microphone and then outputting to a standard voice communication system for transmission; and receiving the analog voice signal through the standard voice communication system, carrying out filtering, waveform coding, channel coding, decompression and analog-digital conversion to obtain the analog voice signal, and promoting a loudspeaker to play and output the analog voice signal after carrying out signal conditioning amplification on the analog voice signal. The method has the beneficial effects that reliable and secure voice communication can be realized by utilizing the standard communication system, and the method has the advantages of safety and reliability, good compatibility and high university.
Description
Technical field
The invention belongs to the voice communication technical field, be specifically related to a kind of method of utilizing standard communication system transmission encrypted speech.
Background technology
Public telephone, mobile phone, wireless interspeaker are the most universal at present commercial signal communication systems, these commercial signal communication systems are widely applied in people's life, their major function is exactly the real-time Transmission voice, for daily life provides great convenience.But, these commercial signal communication system confidentiality are poor, be not suitable for the demanding occasion of some confidentiality, how in the situation that do not change original communication system host-host protocol, standard, standardized standard communication system realize reliable voice communication of maintaining secrecy, the range of application that enlarges the ordinary voice communications system become a technical problem that needs to be resolved hurrily to utilize prior art.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of standard communication system of utilizing safe and reliable, that compatibility is good, versatility is high and transmits the method for encrypted speech.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
A kind of method of utilizing standard communication system transmission encrypted speech, implementation step is as follows:
1) sound collection: the analog voice signal that picks up by microphone also carries out signal condition and amplifies;
2) encrypt transmission: the analog voice signal after described conditioning is amplified carries out analog-to-digital conversion and obtains audio digital signals; Described audio digital signals is compressed, and the speed after compression is below 2.4Kb/s; Audio digital signals after described compression is carried out chnnel coding obtain data communications packets, the speed of described data communications packets is below 3.6Kb/s; Described data communications packets is obtained analog voice signal by waveform coding; Described analog voice signal is carried out filtering to be removed and exports the standard voice communication system to after the band stray signal that waveform coding causes and transmit;
3) receiving and deciphering: receive analog voice signal and carry out filtering and process by the standard voice communication system; Analog voice signal after filtering is processed obtains the data communications packets of digital form after by waveform decoder; The data communications packets of digital form is carried out channel-decoding obtain the compressed digital voice signal; Described compressed digital voice signal is decompressed obtain audio digital signals; Audio digital signals is obtained analog voice signal by digital-to-analogue conversion;
4) voice output: promote loud speaker after analog voice signal is amplified by signal condition and play output.
Utilize the further improvements in methods of standard communication system transmission encrypted speech as the present invention:
Described step 2) chnnel coding in specifically refers to audio digital signals is encrypted with error correction coding, inserts synchronizing information, inserts check information; Described step 3) channel-decoding in specifically refers to the audio digital signals with the data communications packets of digital form is synchronously identified, error correction decoding and deciphering obtain compressing.
Described step 2) waveform coding in specifically refers to 4 waveform codings; Described step 3) waveform decoder in specifically refers to 4 waveform decoders.
the present invention has following advantage: the present invention is in whole transmitting procedure, do not change transmission means and the internal mechanism of standard voice communication system, only need to be from input speech signal, then the standard communication system of sending into prior art after sending by encryption is transmitted, then get final product by output voice after carrying out receiving and deciphering after the transmission of standard communication system, encryption by two ends sends, receiving and deciphering is processed, realized encryption for uncorrelated recipient, can compatible public telephone, mobile phone, the commercial signal communication systems such as wireless interspeaker, can utilize the standard communication system to realize reliable voice communication of maintaining secrecy, have safe and reliable, compatible good, the advantage that versatility is high.
Description of drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or description of the Prior Art, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the framework schematic flow sheet of the embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail, thereby so that advantages and features of the invention can be easier to be it will be appreciated by those skilled in the art that, protection scope of the present invention are made more explicit defining.
Referring to Fig. 1, the present embodiment utilizes the implementation step of method of standard communication system transmission encrypted speech as follows:
1) sound collection: the analog voice signal that picks up by microphone also carries out signal condition and amplifies.Consider that signal condition is enlarged into the normal signal processing procedure, therefore in the present embodiment, the signal condition amplification is not omitted in Fig. 1, signal condition specifically can adopt signal amplifying and conditioning circuit to realize, is the custom circuit of this area due to signal amplifying and conditioning circuit, so do not repeat them here.
2) encrypt transmission, specifically referring to following step 2.1)～2.5).
2.1) will nurse one's health analog voice signal after amplifying and carry out analog-to-digital conversion and obtain audio digital signals.
2.2) audio digital signals is compressed, the speed after compression is below 2.4Kb/s.
Because the transmission bandwidth of standard voice system is very narrow, frequency range is limited in 300Hz～3.4KHz usually, the speed of compress speech is too high can't be transmitted in this system, the present embodiment is below 2.4Kb/s by the rate limit after compressing, therefore guarantee the transmission bandwidth of compatible existing standard voice system, this is one of key of the present embodiment.
2.3) audio digital signals after compressing carries out chnnel coding and obtain data communications packets, the speed of data communications packets is below 3.6Kb/s.
In the present embodiment, chnnel coding specifically refers to audio digital signals is encrypted with error correction coding, inserts synchronizing information, inserts check information.Increase by the signal rate after chnnel coding, the quantity that speed increases, depend on encryption, error correction algorithm, and the synchronization check message length of inserting etc., the present embodiment is by being below 3.6Kb/s with the rate limit after chnnel coding, therefore guarantees the transmission bandwidth of compatible existing standard voice system.
2.4) data communications packets is obtained analog voice signal by waveform coding.
Data formation after chnnel coding a complete data communications packets, if for a Digital Modulation demodulate transmitted system, this can directly transmit, but, what provide due to the standard voice communication system is also analog voice interface, so the present embodiment also needs this data communications packets is carried out waveform coding, waveform coding is in fact an inverse transformation of digital to analogy, this is another key of the present embodiment, and waveform coding is exactly to characterize corresponding digital coding with a series of analog waveforms.
in the present embodiment, waveform coding specifically refers to 4 waveform codings, with 00 of data communication packet encoder, 01, 10, 11 4 kinds of digital coding forms are mapped as four kinds of corresponding analog waveforms (00, 01, 10, 11 respectively corresponding four kinds of analog waveforms), the bandwidth of these four kinds of waveforms is all in the analog voice bandwidth, transmit by the standard communication system guaranteeing, can certainly adopt 2 waveforms, 8 waveforms, even more waveform coding mode, this will depend on the speed of compress speech, the voice transfer bandwidth that channel coding rate and standard communication system can provide etc.Being mapped as example with 3.6Kb/s information rate and 4 waveforms, is 1.8Kb/s through the transmission rate after the waveform mapping, considers the harmonic components of waveform, and its main concentration of energy can satisfy the bandwidth demand of existing standard voice communication system below 3.4KHz.
2.5) analog voice signal is carried out filtering remove and export the standard voice communication system to after the band stray signal that waveform coding causes and transmit.
after waveform coding, form one and come corresponding digitally coded new signal form with analog waveform, but owing to there being certain discontinuity in the waveform transformation process, signal through waveform coding has certain band stray, need to use matched filter to carry out filtering, analog voice transmission bandwidth and the transmission means of channel coding rate and standard communication system depended in the selection of matched filter equally, such as raised cosine, the filters such as Gauss, after matched filtering, treated original analog voice signal has become a kind of speech-like signal, the signal bandwidth of speech-like signal is consistent with the original analog voice signal, what but it characterized is but digital information, this just can transmit in the standard voice system, because primary speech signal has carried out digital compression, encrypt, the coding such as error correction is processed, if do not know processing method, to be difficult to recover, thereby realized the encryption of voice.
3) receiving and deciphering is specifically referring to following step 3.1)～3.5).
3.1) receive analog voice signal and carry out filtering and process by the standard voice communication system.
After the transmission of standard communication system, due to the impact of channel, be added into Noise and Interference in speech-like signal, also to carry out filtering and process, with the impact of reducing noise and interference,
3.2) analog voice signal after filtering is processed obtains the data communications packets of digital form after by waveform decoder.
Be exactly waveform decoder after filtering, so-called waveform decoder is exactly to analyze the analog waveform that arrives that receives, and identifies corresponding digital coding.In the present embodiment, waveform decoder specifically refers to 4 waveform decoders, namely identifies corresponding Binary Zero 0,01,10 or 11 in analog waveform, thereby obtains the data communications packets of digital form (Binary Zero 0,01,10 or 11).
3.3) data communications packets of digital form is carried out channel-decoding obtain the compressed digital voice signal.
Impact due to Noise and Interference, identification is not 100% correct, may also can make a mistake, one of work that channel-decoding should complete that Here it is, channel-decoding comprises the processes such as synchronous identification, error correction decoding and deciphering, the speech coding that makes the information after transmission again get back to compression.In the present embodiment, channel-decoding specifically refers to the audio digital signals with the data communications packets of digital form is synchronously identified, error correction decoding and deciphering obtain compressing.
3.4) the compressed digital voice signal is decompressed obtains audio digital signals.
3.5) audio digital signals is obtained analog voice signal by digital-to-analogue conversion.
4) voice output: promote loud speaker after analog voice signal is amplified by signal condition and play output, thereby realized the transmission of analog voice in the standard communication system.Consider that signal condition is enlarged into the normal signal processing procedure, therefore in the present embodiment, the signal condition amplification is not omitted in Fig. 1, signal condition specifically can adopt signal amplifying and conditioning circuit to realize, is the custom circuit of this area due to signal amplifying and conditioning circuit, so do not repeat them here.
in sum, the present embodiment is in whole transmitting procedure, do not change transmission means and the internal mechanism of standard voice communication system, only need to be from analog voice interface (as microphone interface or analog voice input) when using the feed-in primary speech signal, take out voice from voice output interface (as earphone or analog voice output) just passable, but owing to having carried out above-mentioned processing, realized encryption for uncorrelated recipient, the enciphoring voice telecommunication that uses the present embodiment to build can utilize some common standardized communication systems of standardization, on the basis that does not change the original communication protocol of this transmission system, realize the voice transfer of encryption.
Need to prove, the circuit module that the present embodiment is corresponding comprises signal condition amplifying circuit, modulus/D/A converting circuit, speech compression/decompression circuit, channel coding/decoding circuit, waveform coding/decoding circuit, matched filtering circuit.The signal condition amplifying circuit is used for completing steps 1) and step 4) treatment step; Analog to digital conversion circuit is used for completing steps 2.1) analog-to-digital conversion; The compress speech circuit is used for completing steps 2.2) compress speech; The chnnel coding circuit is used for completing steps 2.3) chnnel coding; The waveform coding circuit is used for completing steps 2.4) waveform coding; The matched filtering circuit is used for completing steps 2.5) and step 3.1) matched filtering; The waveform decoder circuit is used for completing steps 3.2) waveform decoder; Channel decoding circuit is used for completing steps 3.3) channel-decoding; The voice decompression circuit is used for completing steps 3.4) voice decompress; D/A converting circuit is used for completing steps 3.5) digital-to-analogue conversion.Above-mentioned signal condition amplifying circuit, modulus/D/A converting circuit adopt analog circuit to realize; In foregoing circuit, speech compression/decompression circuit, channel coding/decoding circuit, waveform coding/decoding circuit, matched filtering circuit both can adopt digital circuit (microprocessor) to realize, also can adopt in addition analog circuit to realize, specifically repeat no more.
The above is only the preferred embodiment of the present invention, and protection scope of the present invention is not limited in above-mentioned execution mode, and every technical scheme that belongs to the principle of the invention all belongs to protection scope of the present invention.For a person skilled in the art, some improvements and modifications of carrying out under the prerequisite that does not break away from principle of the present invention, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (3)
1. method of utilizing standard communication system transmission encrypted speech is characterized in that implementation step is as follows:
1) sound collection: the analog voice signal that picks up by microphone also carries out signal condition and amplifies;
2) encrypt transmission: the analog voice signal after described conditioning is amplified carries out analog-to-digital conversion and obtains audio digital signals; Described audio digital signals is compressed, and the speed after compression is below 2.4Kb/s; Audio digital signals after described compression is carried out chnnel coding obtain data communications packets, the speed of described data communications packets is below 3.6Kb/s; Described data communications packets is obtained analog voice signal by waveform coding; Described analog voice signal is carried out filtering to be removed and exports the standard voice communication system to after the band stray signal that waveform coding causes and transmit;
3) receiving and deciphering: receive analog voice signal and carry out filtering and process by the standard voice communication system; Analog voice signal after filtering is processed obtains the data communications packets of digital form after by waveform decoder; The data communications packets of digital form is carried out channel-decoding obtain the compressed digital voice signal; Described compressed digital voice signal is decompressed obtain audio digital signals; Audio digital signals is obtained analog voice signal by digital-to-analogue conversion;
4) voice output: promote loud speaker after analog voice signal is amplified by signal condition and play output.
2. the method for utilizing standard communication system transmission encrypted speech according to claim 1 is characterized in that: the chnnel coding described step 2) specifically refers to audio digital signals is encrypted and error correction coding, insert synchronizing information, insert check information; Described step 3) channel-decoding in specifically refers to the audio digital signals with the data communications packets of digital form is synchronously identified, error correction decoding and deciphering obtain compressing.
3. the method for utilizing standard communication system transmission encrypted speech according to claim 2, it is characterized in that: the waveform coding described step 2) specifically refers to 4 waveform codings, with data communications packets be encoded to 00,01,10,11 4 kind of coding form, each coding form is corresponding a kind of analog voice signal waveform respectively; Described step 3) waveform decoder in specifically refers to 4 waveform decoders, extract 00,01,10 from analog voice signal, analog voice signal waveform corresponding to four kinds of coding forms of youngster, then according to the analog voice signal waveform that extracts obtain to comprise 00,01,10, the digital signal of four kinds of codings of youngster, and according to comprise 00,01,10, the digital signal decoding of 11 4 kind of coding obtains the data communications packets of digital form.
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| CN2013100510936A CN103152130A (en) | 2013-01-25 | 2013-01-25 | Method for transmitting encrypted voice by utilizing standard communication system |
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| CN2013100510936A CN103152130A (en) | 2013-01-25 | 2013-01-25 | Method for transmitting encrypted voice by utilizing standard communication system |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1413005A (en) * | 2002-11-25 | 2003-04-23 | 华南理工大学 | In-band common frequency digital code cordless telephone |
| CN1437349A (en) * | 2002-02-08 | 2003-08-20 | 旋永南 | Enciphering and deciphering device for voice/data transmission |
| CN1707993A (en) * | 2004-04-14 | 2005-12-14 | M/A-Com公司 | Universal microphone for secure radio communication |
| US20060056553A1 (en) * | 2002-12-06 | 2006-03-16 | Bruekers Alphons Antonius M L | Multirate filter as well as display system and mobile telephone comprising said multirate filter |
-
2013
- 2013-01-25 CN CN2013100510936A patent/CN103152130A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1437349A (en) * | 2002-02-08 | 2003-08-20 | 旋永南 | Enciphering and deciphering device for voice/data transmission |
| CN1413005A (en) * | 2002-11-25 | 2003-04-23 | 华南理工大学 | In-band common frequency digital code cordless telephone |
| US20060056553A1 (en) * | 2002-12-06 | 2006-03-16 | Bruekers Alphons Antonius M L | Multirate filter as well as display system and mobile telephone comprising said multirate filter |
| CN1707993A (en) * | 2004-04-14 | 2005-12-14 | M/A-Com公司 | Universal microphone for secure radio communication |
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Application publication date: 20130612 |