CN105391675A - Voice signal transmission method, terminal and system - Google Patents
Voice signal transmission method, terminal and system Download PDFInfo
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- CN105391675A CN105391675A CN201410453401.2A CN201410453401A CN105391675A CN 105391675 A CN105391675 A CN 105391675A CN 201410453401 A CN201410453401 A CN 201410453401A CN 105391675 A CN105391675 A CN 105391675A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/40—Network security protocols
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Abstract
The invention discloses a voice signal transmission method, terminal and system. The method comprises the steps that a first terminal carries out the first amplitude conversion of a voice signal, and obtains an encryption signal, wherein the amplitude conversion enables the amplitude of the encryption signal to be reduced to 1/n of the amplitude of the voice signal, and n is a positive integer; the first terminal enables the encryption signal to be mixed with a noise signal, and forms a frequency mixing signal, wherein the amplitude of the noise signal is greater than the amplitude of the encryption signal; the first terminal enables the frequency mixing signal to be loaded to a preset carrier frequency, so as to obtain a modulated signal and to transmit the modulated signal to a second terminal in a channel. Through the above mode, the method can prevent the voice signal from being intercepted under the condition that the normal communication is not affected.
Description
Technical field
The present invention relates to wireless communication field, particularly relate to a kind of speech signal transmission method, terminal and system.
Background technology
At society, espionage increasingly sharpens, and high-tech means occurs frequently, and along with popularizing of smart mobile phone, more and more the high-tech such as wooden horse, virus software is installed on the smart mobile phone of user unawares targetedly.In the process that user exchanges with other people, secret steals classified information, causes the leakage of state secret, corporate secret and individual privacy, and then causes the loss of country, collective and individual interest.For this situation, need a kind of can at any time with mobile phone with the use of mancarried device can prevent from the leakage of classified information from not affecting again mobile phone normally using.
Means at present for the anti-eavesdrop software of smart mobile phone are mobile phone antivirus software, along with wooden horse and viral continuous renewal, and the implantation of wooden horse and virus is more and more profound, even some act of espionage regardless of expense, hardware mode is adopted to implant eavesdropping system.Therefore mobile phone antivirus software is adopted fundamentally can not to ensure that voice messaging is not leaked.
Summary of the invention
The technical problem that the present invention solves provides a kind of speech signal transmission method, terminal and system, voice signal can be prevented to be ravesdropping when not affecting normal talking.
For solving the problems of the technologies described above, the invention provides a kind of speech signal transmission method, comprising: voice signal is carried out the first amplitude conversion by first terminal, obtain coded signal, wherein the first amplitude conversion makes the amplitude of coded signal be reduced to the 1/n of voice signal, and n is positive integer; First terminal is by coded signal and noise signal mixing, and form mixed frequency signal, wherein the amplitude of noise signal is greater than the amplitude of coded signal; Mixed frequency signal is loaded into obtain modulated signal on default carrier frequency by first terminal, sends modulated signal to the second terminal in the channel.
Wherein, method also comprises: the second terminal receives modulated signal from transmission channel; Second terminal carries out demodulation according to default carrier frequency to modulated signal, obtains mixed frequency signal; Second terminal carries out filtering to mixed frequency signal, with filtering noise signal, thus obtains coded signal; Coded signal is carried out the second amplitude conversion by the second terminal, obtains voice signal, and wherein the second amplitude conversion makes the amplitude of coded signal be increased to the n of coded signal open width degree doubly, and n is positive integer.
Wherein, method also comprises: the second terminal obtains modulated signal from transmission channel; Second terminal carries out demodulation according to default carrier frequency to modulated signal, obtains mixed frequency signal; Coded signal in mixed frequency signal is carried out the 3rd amplitude conversion by the second terminal, and keep noise signal amplitude constant, acquisition amplitude is greater than the voice signal of noise signal amplitude, wherein the 3rd amplitude conversion makes the amplitude of coded signal be increased to the m of coded signal open width degree doubly, m is positive integer, m ﹥ n.
For solving the problems of the technologies described above, the invention provides a kind of transmitting voice signal system, comprising first terminal and the second terminal, wherein:
First terminal, comprising:
Encryption chip, comprising:
Divider, for voice signal is carried out the first amplitude conversion, obtains coded signal, and wherein the first amplitude conversion makes the amplitude of coded signal be reduced to the 1/n of voice signal, and n is positive integer;
Frequency mixer, for by coded signal and noise signal mixing, form mixed frequency signal, wherein the amplitude of noise signal is greater than the amplitude of coded signal;
First radio circuit, for being loaded into mixed frequency signal on default carrier frequency to obtain modulated signal;
First radio-frequency antenna, for sending modulated signal to the second terminal in transmission channel.
Wherein, the second terminal comprises:
Second radio-frequency antenna, for receiving modulated signal from transmission channel;
Second radio circuit, for carrying out demodulation according to presetting carrier frequency to modulated signal, obtains mixed frequency signal;
Deciphering chip, comprising:
Filter, for carrying out filtering to mixed frequency signal, with filtering noise signal, thus obtains coded signal;
Multiplier, for coded signal is carried out the second amplitude conversion, obtains voice signal, and wherein the second amplitude conversion makes the amplitude of coded signal be increased to the n of coded signal open width degree doubly, and n is positive integer.
Wherein, the second terminal comprises:
Second radio-frequency antenna, for obtaining modulated signal from transmission channel;
Second radio circuit, for carrying out demodulation according to presetting carrier frequency to modulated signal, obtains mixed frequency signal;
Deciphering chip, for the coded signal in mixed frequency signal being carried out the 3rd amplitude conversion, and keep noise signal amplitude constant, acquisition amplitude is greater than the voice signal of noise signal amplitude, wherein the 3rd amplitude conversion makes the amplitude of coded signal be increased to the m of the certain amplitude of coded signal doubly, m is positive integer, m ﹥ n.
For solving the problems of the technologies described above, the invention provides a kind of first terminal, comprising:
Encryption chip, comprising:
Divider, for voice signal is carried out the first amplitude conversion, obtains coded signal, and wherein the first amplitude conversion makes the amplitude of coded signal be reduced to the 1/n of voice signal, and n is positive integer;
Frequency mixer, for by coded signal and noise signal mixing, form mixed frequency signal, wherein the amplitude of noise signal is greater than the amplitude of coded signal;
First radio circuit, is connected with encryption chip, for being loaded into by mixed frequency signal on default carrier frequency to obtain modulated signal;
First radio-frequency antenna, for sending modulated signal in transmission channel.
For solving the problems of the technologies described above, the invention provides a kind of second terminal, comprising:
Second radio-frequency antenna, for receiving modulated signal from transmission channel;
Second radio circuit, for carrying out demodulation according to presetting carrier frequency to modulated signal, obtains mixed frequency signal;
Deciphering chip, comprising:
Filter, for carrying out filtering to mixed frequency signal, with filtering noise signal, thus obtains coded signal;
Multiplier, for coded signal is carried out the second amplitude conversion, obtains voice signal, and wherein the second amplitude conversion makes the amplitude of coded signal be increased to the n of coded signal open width degree doubly, and n is positive integer.
For solving the problems of the technologies described above, the invention provides a kind of second terminal, comprising:
Second radio-frequency antenna, for obtaining modulated signal from transmission channel;
Second radio circuit, for carrying out demodulation according to presetting carrier frequency to modulated signal, obtains mixed frequency signal;
Deciphering chip, for the coded signal in mixed frequency signal being carried out the 3rd amplitude conversion, and keep noise signal amplitude constant, acquisition amplitude is greater than the voice signal of noise signal amplitude, wherein the 3rd amplitude conversion makes the amplitude of coded signal be increased to the m of coded signal open width degree doubly, m is positive integer, m ﹥ n.
By such scheme, the invention has the beneficial effects as follows: by first terminal, voice signal is carried out the first amplitude conversion, obtain coded signal, wherein the first amplitude conversion makes the amplitude of coded signal be reduced to the 1/n of voice signal, and n is positive integer; First terminal is by coded signal and noise signal mixing, and form mixed frequency signal, wherein the amplitude of noise signal is greater than the amplitude of coded signal; Mixed frequency signal is loaded into obtain modulated signal on default carrier frequency by first terminal, sending modulated signal to the second terminal in the channel, voice signal can being prevented to be ravesdropping when not affecting normal talking.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the speech signal transmission method of first embodiment of the invention;
Fig. 2 is the schematic diagram of voice signal and noise signal in the present invention;
Fig. 3 is the structural representation of the transmitting voice signal system of first embodiment of the invention;
Fig. 4 is the structural representation of the first terminal of the embodiment of the present invention;
Fig. 5 is the structural representation of the second terminal of first embodiment of the invention;
Fig. 6 is the structural representation of the second terminal of second embodiment of the invention;
Fig. 7 is the structural representation of the signal transmission system of second embodiment of the invention;
Fig. 8 is the schematic flow sheet of the method for transmitting signals of second embodiment of the invention.
Embodiment
Refer to Fig. 1, Fig. 1 is the schematic flow sheet of the speech signal transmission method of the embodiment of the present invention.As shown in Figure 1, speech signal transmission method comprises:
Step S10: voice signal is carried out the first amplitude conversion by first terminal, obtains coded signal, and wherein the first amplitude conversion makes the amplitude of coded signal be reduced to the 1/n of voice signal, and n is positive integer.Wherein voice signal is preferably the voice signal of the transmission of the mobile terminals such as mobile phone in communication process.
Step S11: first terminal is by coded signal and noise signal mixing, and form mixed frequency signal, wherein the amplitude of noise signal is greater than the amplitude of coded signal.
Wherein as shown in Figure 2,1 represents voice signal, and 2 represent noise signal.The coded signal obtained after voice signal 1 is carried out the first amplitude conversion and noise signal mixing, the mixed frequency signal amplitude finally obtained is very little, is mixed in noise signal, can not be identified by listener-in.
Step S12: mixed frequency signal is loaded into obtain modulated signal on default carrier frequency by first terminal, sends modulated signal to the second terminal in the channel.
At receiving terminal, two kinds of methods can be had from the mixed frequency signal received to obtain voice signal.Second terminal is as receiving terminal, and first method is: the second terminal receives modulated signal from transmission channel; Second terminal carries out demodulation according to default carrier frequency to modulated signal, obtains mixed frequency signal; Second terminal carries out filtering to mixed frequency signal, with filtering noise signal, thus obtains coded signal; Coded signal is carried out the second amplitude conversion by the second terminal, obtains voice signal, and wherein the second amplitude conversion makes the amplitude of coded signal be increased to the n of coded signal open width degree doubly, and n is positive integer.Second method is: the second terminal obtains modulated signal from transmission channel; Second terminal carries out demodulation according to default carrier frequency to modulated signal, obtains mixed frequency signal; Coded signal in mixed frequency signal is carried out the 3rd amplitude conversion by the second terminal, and keep noise signal amplitude constant, acquisition amplitude is greater than the voice signal of noise signal amplitude, wherein the 3rd amplitude conversion makes the amplitude of coded signal be increased to the m of coded signal open width degree doubly, m is positive integer, m ﹥ n.So in the normal talking situation not affecting the mobile terminals such as mobile phone, eavesdropping can be prevented.
Fig. 3 is the structural representation of the transmitting voice signal system of the embodiment of the present invention.As shown in Figure 3, transmitting voice signal system 10 comprises: first terminal 20 and the second terminal 30.Voice signal is carried out the first amplitude conversion by first terminal 20, obtains coded signal, and wherein the first amplitude conversion makes the amplitude of coded signal be reduced to the 1/n of voice signal, and n is positive integer; By coded signal and noise signal mixing, form mixed frequency signal, wherein the amplitude of noise signal is greater than the amplitude of coded signal; Then mixed frequency signal is loaded into obtain modulated signal on default carrier frequency, and in transmission channel, sends modulated signal to the second terminal 30.The coded signal that first terminal 20 obtains after voice signal is carried out the first amplitude conversion and noise signal mixing, the mixed frequency signal amplitude finally obtained is very little, is mixed in noise signal, can not be identified by listener-in.Second terminal 30, as receiving terminal, can have two kinds of methods to obtain voice signal from the mixed frequency signal received.First method is: the second terminal 30 receives modulated signal from transmission channel, according to default carrier frequency, demodulation is carried out to modulated signal, obtain mixed frequency signal, and filtering is carried out to mixed frequency signal, with filtering noise signal, thus obtain coded signal, then coded signal is carried out the second amplitude conversion, obtain voice signal, wherein the second amplitude conversion makes the amplitude of coded signal be increased to the n of coded signal open width degree doubly, and n is positive integer.Second method is: the second terminal 30 obtains modulated signal from transmission channel, according to default carrier frequency, demodulation is carried out to modulated signal, obtain mixed frequency signal, then the coded signal in mixed frequency signal is carried out the 3rd amplitude conversion, and keeping noise signal amplitude constant, acquisition amplitude is greater than the voice signal of noise signal amplitude, and wherein the 3rd amplitude conversion makes the amplitude of coded signal be increased to the m of the certain amplitude of coded signal doubly, m is positive integer, m ﹥ n.So in the normal talking situation not affecting the mobile terminals such as mobile phone, eavesdropping can be prevented.
Fig. 4 is the structural representation of the first terminal of the embodiment of the present invention.As shown in Figure 4, first terminal 20 comprises: encryption chip 21, first radio circuit 22 and the first radio-frequency antenna 23.Wherein, encryption chip 21 comprises divider 211 and frequency mixer 212.Divider 211, for voice signal is carried out the first amplitude conversion, obtains coded signal, and wherein the first amplitude conversion makes the amplitude of coded signal be reduced to the 1/n of voice signal, and n is positive integer.Frequency mixer 212 is connected with divider 211, and for by coded signal and noise signal mixing, form mixed frequency signal, wherein the amplitude of noise signal is greater than the amplitude of coded signal.First radio circuit 22 is connected with frequency mixer 212, for being loaded into by mixed frequency signal on default carrier frequency to obtain modulated signal.First radio-frequency antenna 23 is connected with the first radio circuit 22, for sending modulated signal to the second terminal in transmission channel.The coded signal that encryption chip 21 like this obtains after voice signal is carried out the first amplitude conversion and noise signal mixing, the mixed frequency signal amplitude finally obtained is very little, be mixed in noise signal, can not be identified by listener-in, and then eavesdropping can be prevented in the normal talking situation not affecting the mobile terminals such as mobile phone.
Fig. 5 is the structural representation of the second terminal of first embodiment of the invention.As shown in Figure 5, the second terminal 30 comprises: the second radio-frequency antenna 31, second radio circuit 32 and deciphering chip 33.Deciphering chip 33 comprises filter 331 and multiplier 332.Second radio-frequency antenna 31 for receiving modulated signal from transmission channel.Second radio circuit 32, for carrying out demodulation according to presetting carrier frequency to modulated signal, obtains mixed frequency signal.Filter 331, for carrying out filtering to mixed frequency signal, with filtering noise signal, thus obtains coded signal.Multiplier 332, for coded signal is carried out the second amplitude conversion, obtains voice signal, and wherein the second amplitude conversion makes the amplitude of coded signal be increased to the n of coded signal open width degree doubly, and n is positive integer.This just successfully can obtain voice signal from the modulated signal received, and therefore can prevent eavesdropping in the normal talking situation not affecting the mobile terminals such as mobile phone.
Fig. 6 is the structural representation of the second terminal of first embodiment of the invention.As shown in Figure 6, the second terminal 40 comprises: the second radio-frequency antenna 41, second radio circuit 42 and deciphering chip 43.Second radio-frequency antenna 41 for obtaining modulated signal from transmission channel.Second radio circuit 42, for carrying out demodulation according to presetting carrier frequency to modulated signal, obtains mixed frequency signal.Deciphering chip 43 is for carrying out the 3rd amplitude conversion by the coded signal in mixed frequency signal, and keep noise signal amplitude constant, acquisition amplitude is greater than the voice signal of noise signal amplitude, wherein the 3rd amplitude conversion makes the amplitude of coded signal be increased to the m of coded signal open width degree doubly, m is positive integer, m ﹥ n.In embodiments of the present invention, deciphering chip 43 does not need to carry out filtering successfully can obtain voice signal from the modulated signal received, and can prevent eavesdropping in the normal talking situation not affecting the mobile terminals such as mobile phone.
Fig. 7 is the structural representation of the signal transmission system of second embodiment of the invention.As shown in Figure 7, signal transmission system 50 comprises: encryption chip 51 and deciphering chip 52.Encryption chip 51 is arranged in first terminal, and wherein first terminal is provided with the first operating system.Deciphering chip 52 is arranged in the second terminal, and wherein the second terminal is provided with the second operating system.The data to be transmitted in first terminal with original file format is converted to the Frame with the first operating system and the equal common file form that can identify of the second operating system by encryption chip 51, and sends Frame to the second terminal by transmission channel.As in the second terminal of receiving terminal, deciphering chip 52 obtains Frame, and the Frame with common file form is converted to the data to be transmitted with original file format.
Wherein, the data to be transmitted with original file format comprises the audio signal with audio file formats and the vision signal with video file format.Common format is any one in JPG form, PDF.First operating system installation in encryption chip 51, and is also provided with the second operating system in first terminal.The Frame that the data to be transmitted in first terminal with original file format is converted to common file form by encryption chip 51 realizes under the environment of the first operating system, then under the second operating system environment, the Frame of common file form is sent to the second terminal.
In embodiments of the present invention, deciphering chip 52 is also provided with exclusive identification code.At first terminal to before the second terminal transmission data, both communicate to connect, and the exclusive identification code that deciphering chip 52 is provided with is sent to first terminal by the second terminal, and encryption chip 51 prestores this exclusive identification code.Exclusive identification code can also be placed in Frame by encryption chip 51 like this, can be placed in the optional position of Frame particularly, to be encrypted data to be transmitted, is then sent Frame to the second terminal with exclusive identification code by transmission channel.Also be provided with the first operating system in second terminal, wherein the first operating system installation is in deciphering chip 52.As in the second terminal of receiving terminal, the process that the Frame with common file form is converted to the data to be transmitted with original file format by deciphering chip 52 realizes under the environment of the first operating system, and the first operating system is unknowable for the other-end in network, even if the other-end so in network is truncated to the transmitted Frame with common file form, also cannot be decrypted to obtain transmitted concrete data to it, therefore can prevent eavesdropping well.If what the second terminal received is the Frame with exclusive identification code, then deciphering chip 52 judges that whether the exclusive identification code in Frame is consistent with the exclusive identification code carried, if, the Frame with common file form is converted to the data to be transmitted with original file format, if not, judge to shake hands unsuccessfully, disconnect with first terminal.The second terminal that this Frame after unique identification code encryption just making encryption chip send only comprises deciphering chip is blocked up and may be decrypted, even if other user terminals get the Frame of encryption chip transmission, owing to there is no corresponding exclusive identification code, can not be decrypted to obtain transmitted packet to it.Therefore embodiment of the present invention method can prevent eavesdropping better.
Fig. 8 is the schematic flow sheet of the method for transmitting signals of second embodiment of the invention.This method for transmitting signals is for the data to be transmitted in first terminal is sent to the second terminal.Wherein first terminal is provided with the first operating system, and is provided with encryption chip in first terminal, and the second terminal is provided with the second operating system, and is provided with deciphering chip in the second terminal.As shown in Figure 8, method for transmitting signals comprises:
Step S20: the data to be transmitted in first terminal with original file format is converted to the Frame with the first operating system and the equal common file form that can identify of the second operating system by encryption chip.
The data to be transmitted wherein with original file format comprises the audio signal with audio file formats and the vision signal with video file format.Common format is any one in JPG form, PDF.The Frame that the data to be transmitted in first terminal with original file format is converted to common file form by encryption chip realizes under the environment of the first operating system, then under the second operating system environment, the Frame of common file form is sent to the second terminal.
Step S21: encryption chip sends Frame to the second terminal by channel.
In embodiments of the present invention, deciphering chip is provided with exclusive identification code.At first terminal to before the second terminal transmission data, both communicate to connect, and the exclusive identification code that deciphering chip is provided with by the second terminal is sent to first terminal, and encryption chip prestores this exclusive identification code.So in the step s 21, exclusive identification code is placed in Frame by encryption chip, and is sent Frame to the second terminal with exclusive identification code by transmission channel.
Step S22: deciphering chip obtains Frame, and the Frame with common file form is converted to the data to be transmitted with original file format.
In step S22, the process that the Frame with common file form is converted to the data to be transmitted with original file format by deciphering chip realizes under the environment of the first operating system, and the first operating system environment is sightless for the other-end in network, even if the other-end so in network is truncated to the transmitted Frame with common file form, also cannot be decrypted to obtain transmitted concrete data to it, therefore can prevent eavesdropping well.
If what the second terminal received is the Frame with exclusive identification code, then deciphering chip judges that whether the exclusive identification code in Frame packet header is consistent with the exclusive identification code carried, if, the Frame with common file form is converted to the data to be transmitted with original file format, if not, judge to shake hands unsuccessfully, disconnect with first terminal.The second terminal that this Frame after unique identification code encryption just making encryption chip send only comprises deciphering chip is blocked up and may be decrypted, even if other user terminals get the Frame of encryption chip transmission, owing to there is no corresponding exclusive identification code, can not be decrypted to obtain transmitted packet to it.Therefore embodiment of the present invention method can prevent eavesdropping better.
In sum, voice signal is carried out the first amplitude conversion by first terminal by the present invention, obtains coded signal, and wherein the first amplitude conversion makes the amplitude of coded signal be reduced to the 1/n of voice signal, and n is positive integer; First terminal is by coded signal and noise signal mixing, and form mixed frequency signal, wherein the amplitude of noise signal is greater than the amplitude of coded signal; Mixed frequency signal is loaded into obtain modulated signal on default carrier frequency by first terminal, sending modulated signal to the second terminal in the channel, voice signal can being prevented to be ravesdropping when not affecting normal talking.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize specification of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (9)
1. a speech signal transmission method, is characterized in that, described method comprises:
Voice signal is carried out the first amplitude conversion by first terminal, obtains coded signal, and wherein said first amplitude conversion makes the amplitude of described coded signal be reduced to the 1/n of described voice signal, and n is positive integer;
Described first terminal is by described coded signal and noise signal mixing, and form mixed frequency signal, the amplitude of wherein said noise signal is greater than the amplitude of described coded signal;
Described mixed frequency signal to be loaded on default carrier frequency to obtain modulated signal by first terminal, sends described modulated signal to the second terminal in the channel.
2. method according to claim 1, is characterized in that, described method also comprises:
Described second terminal receives described modulated signal from transmission channel;
Described second terminal carries out demodulation according to described default carrier frequency to described modulated signal, obtains described mixed frequency signal;
Described second terminal carries out filtering to described mixed frequency signal, to filter described noise signal, thus obtains described coded signal;
Described coded signal is carried out the second amplitude conversion by described second terminal, obtains described voice signal, and wherein said second amplitude conversion makes the amplitude of described coded signal be increased to the n of described coded signal open width degree doubly, and n is positive integer.
3. method according to claim 1, is characterized in that, described method also comprises:
Described second terminal obtains described modulated signal from transmission channel;
Described second terminal carries out demodulation according to described default carrier frequency to described modulated signal, obtains described mixed frequency signal;
Described coded signal in described mixed frequency signal is carried out the 3rd amplitude conversion by described second terminal, and keep described noise signal amplitude constant, acquisition amplitude is greater than the voice signal of described noise signal amplitude, wherein said 3rd amplitude conversion makes the amplitude of described coded signal be increased to the m of described coded signal open width degree doubly, m is positive integer, m ﹥ n.
4. a transmitting voice signal system, is characterized in that, comprises first terminal and the second terminal, wherein:
Described first terminal, comprising:
Encryption chip, comprising:
Divider, for voice signal is carried out the first amplitude conversion, obtains coded signal, and wherein said first amplitude conversion makes the amplitude of described coded signal be reduced to the 1/n of described voice signal, and n is positive integer;
Frequency mixer, for by described coded signal and noise signal mixing, form mixed frequency signal, the amplitude of wherein said noise signal is greater than the amplitude of described coded signal;
First radio circuit, for being loaded into described mixed frequency signal on default carrier frequency to obtain modulated signal;
First radio-frequency antenna, for sending described modulated signal to described second terminal in transmission channel.
5. system according to claim 4, is characterized in that, described second terminal comprises:
Second radio-frequency antenna, for receiving modulated signal from transmission channel;
Second radio circuit, for carrying out demodulation according to presetting carrier frequency to described modulated signal, obtains mixed frequency signal;
Deciphering chip, comprising:
Filter, for carrying out filtering to described mixed frequency signal, to filter described noise signal, thus obtains described coded signal;
Multiplier, for described coded signal is carried out the second amplitude conversion, obtains described voice signal, and wherein said second amplitude conversion makes the amplitude of described coded signal be increased to the n of described coded signal open width degree doubly, and n is positive integer.
6. system according to claim 4, is characterized in that, described second terminal comprises:
Second radio-frequency antenna, for obtaining modulated signal from transmission channel;
Second radio circuit, for carrying out demodulation according to presetting carrier frequency to described modulated signal, obtains mixed frequency signal;
Deciphering chip, for the described coded signal in described mixed frequency signal being carried out the 3rd amplitude conversion, and keep described noise signal amplitude constant, acquisition amplitude is greater than the voice signal of described noise signal amplitude, wherein said 3rd amplitude conversion makes the amplitude of described coded signal be increased to the m of the certain amplitude of described coded signal doubly, m is positive integer, m ﹥ n.
7. a first terminal, is characterized in that, comprising:
Encryption chip, comprising:
Divider, for voice signal is carried out the first amplitude conversion, obtains coded signal, and wherein said first amplitude conversion makes the amplitude of described coded signal be reduced to the 1/n of described voice signal, and n is positive integer;
Frequency mixer, for by described coded signal and noise signal mixing, form mixed frequency signal, the amplitude of wherein said noise signal is greater than the amplitude of described coded signal;
First radio circuit, is connected with described encryption chip, for being loaded into by described mixed frequency signal on default carrier frequency to obtain modulated signal;
First radio-frequency antenna, for sending described modulated signal in transmission channel.
8. second terminal, is characterized in that, comprising:
Second radio-frequency antenna, for receiving modulated signal from transmission channel;
Second radio circuit, for carrying out demodulation according to presetting carrier frequency to described modulated signal, obtains mixed frequency signal;
Deciphering chip, comprising:
Filter, for carrying out filtering to described mixed frequency signal, to filter described noise signal, thus obtains described coded signal;
Multiplier, for described coded signal is carried out the second amplitude conversion, obtains described voice signal, and wherein said second amplitude conversion makes the amplitude of described coded signal be increased to the n of described coded signal open width degree doubly, and n is positive integer.
9. second terminal, is characterized in that, comprising:
Second radio-frequency antenna, for obtaining modulated signal from transmission channel;
Second radio circuit, for carrying out demodulation according to presetting carrier frequency to described modulated signal, obtains mixed frequency signal;
Deciphering chip, for the described coded signal in described mixed frequency signal being carried out the 3rd amplitude conversion, and keep described noise signal amplitude constant, acquisition amplitude is greater than the voice signal of described noise signal amplitude, wherein said 3rd amplitude conversion makes the amplitude of described coded signal be increased to the m of described coded signal open width degree doubly, m is positive integer, m ﹥ n.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410453401.2A CN105391675A (en) | 2014-09-05 | 2014-09-05 | Voice signal transmission method, terminal and system |
| PCT/CN2014/086393 WO2016033821A1 (en) | 2014-09-05 | 2014-09-12 | Speech signal transmission method, device and system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410453401.2A CN105391675A (en) | 2014-09-05 | 2014-09-05 | Voice signal transmission method, terminal and system |
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| CN105391675A true CN105391675A (en) | 2016-03-09 |
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| CN201410453401.2A Pending CN105391675A (en) | 2014-09-05 | 2014-09-05 | Voice signal transmission method, terminal and system |
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| WO (1) | WO2016033821A1 (en) |
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| CN107070920A (en) * | 2017-04-18 | 2017-08-18 | 北京元心科技有限公司 | Information transmission method and device based on communication application |
| CN107259956A (en) * | 2017-07-25 | 2017-10-20 | 长江大学 | A kind of mailbox control system and method based on Application on Voiceprint Recognition |
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| CN107070920A (en) * | 2017-04-18 | 2017-08-18 | 北京元心科技有限公司 | Information transmission method and device based on communication application |
| CN107259956A (en) * | 2017-07-25 | 2017-10-20 | 长江大学 | A kind of mailbox control system and method based on Application on Voiceprint Recognition |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2016033821A1 (en) | 2016-03-10 |
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