CN102983963A - Encryption conversation method and conversation encryption device - Google Patents
Encryption conversation method and conversation encryption device Download PDFInfo
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- CN102983963A CN102983963A CN2012105299294A CN201210529929A CN102983963A CN 102983963 A CN102983963 A CN 102983963A CN 2012105299294 A CN2012105299294 A CN 2012105299294A CN 201210529929 A CN201210529929 A CN 201210529929A CN 102983963 A CN102983963 A CN 102983963A
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Abstract
The invention discloses an encryption conversation method and a conversation encryption device. The encryption conversation method comprises the steps that a communication frequency band between a calling phone and a called phone is divided into 32 codes; when the calling phone and the called phone start a conversation, any code in the 32 codes is used; another code in the 32 codes is used next time after the conversation is started; and the codes in the 32 codes are used to encrypt during a conversation course all the time until the conversation ends. An encryption chip is used to conduct frequency-point hopping code encryption on voice, the confidentiality of the conversation course is improved; the conversation encryption device is complicated in structure; and the manufacturing cost is lowered.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of encryption call method and conversation encryption device.
Background technology
The development of the communication technology and universal has brought increasing facility for people's work and life.But meanwhile, it has also brought some troubles to people.The event stolen such as personal information constantly occurs, some in addition consist of serious case.The approach of information theft comprises usurping of personal document data, the network information usurp with usurping of phone information etc.
In order to prevent that phone is ravesdropping, guarantee the information security in the telephone communication, various telephone encryption devices produce in succession.At present, the multiple detector that prevents from eavesdropping occurs on the market, when finding to have monitoring telephone to be attempted by on the telephone set, sent alarm.The breaking of voice device is arranged, and it changes tone with teller's sound, uprises or step-down, the audio distortions that intercepts in the middle of making and not hearing.And have corresponding device will become the speech reduction of accent at the other end of communication, speech can not heard.The phonetic cryptographic coder that the digital technology utilized is arranged, it is converted to digital signal with the voice signal of simulation, again the voice signal of digital form is compressed and encodes to reach the purpose of encryption.Voice signal after the encryption becomes audio signal with certain rate modulation again, in order to can transmit in analogue system; Also have in addition the application encipher chip, be fixed the voice encryption device of frequency coding.
Although the breaking of voice device is simple in structure, cost is low, has certain privacy functions, and its privacy degrees is extremely low, has kept the tone and intonation information in the voice signal after the modified tone fully, and experienced listener can be judged the content of speech substantially.Although utilize in contrast the phonetic cryptographic coder of digital technology to have quite high confidentiality, its complex structure, cost is high, and also has very large time delay.From the range of application aspect, the breaking of voice device strictly says not to be encryption equipment, can only cover up simply voice in addition.In fact, it has only changed tonequality, and uses simple device that tonequality is restored.Therefore it is only to be applied in some unessential occasion.Because utilize the height of the phonetic cryptographic coder of digital technology to maintain secrecy and expensive characteristic, it generally is applied in the independent communication system of high privacy degrees, such as military channels.
Therefore, prior art has yet to be improved and developed.
Summary of the invention
In view of above-mentioned the deficiencies in the prior art, the object of the present invention is to provide a kind of encryption call method and conversation encryption device, to improve the confidentiality in the communication process.
Technical scheme of the present invention is as follows:
A kind of encryption call method, it may further comprise the steps:
A, the communications band of main dialing telephone and called phone is divided into 32 codings, described main dialing telephone and described called phone use any coding in described 32 codings when beginning to converse, after the conversation beginning next used another coding in described 32 codings constantly, in communication process, use all the time the coding in described 32 codings to be encrypted, until end of conversation;
Wherein, adjacent next time interval between constantly is different, and that uses in each time interval is encoded to arbitrary coding in described 32 codings.
Described encryption call method, wherein, described steps A also comprises: select a frequency as the division frequency in the frequency range of audio frequency 300Hz-3300Hz, it is that low-frequency range, split point-3300Hz are set to high band that 300Hz-divides frequency point setting, sub-band in low-frequency range and the high band is carried out anti-phase conversion, form described 32 codings; In communication process, select arbitrary coding in described 32 codings by five parallel-by-bit data wires.
Described encryption call method, wherein, the detailed process of the sub-band in low-frequency range and the high band being carried out anti-phase conversion is: the low frequency frequency range in every sub-frequency bands is moved on to the high-frequency frequency range, the high-frequency frequency range is moved on to the low frequency frequency range.
Described encryption call method, wherein, described steps A also comprises the voice encryption step, it specifically comprises:
B, the first chip adopt any coding in described 32 codings that voice signal is transformed to the emission output signal by the emission modulated signal spectrum, and then described the first chip is sent to the second chip with described emission output signal;
The described emission output signal that described the second chip will receive is carried out the conversion frequency spectrum processing, finishes the encryption to voice signal;
Described the first chip controlled by microprocessor and the second chip is encrypted by same transformation period cycle and same coding.
A kind of conversation encryption device, it comprises housing, wherein, be provided with the Audio Processing Unit that is used to voice call encryption and deciphering in the described housing, be provided with on the described housing for the base that connects Telephone set and connect slot, be used for connecting the handle connection slot of telephone handle, be used for connecting the socket connection slot of telephone handle socket, be used for connecting the connection slot and the power supply slot that is used for to described conversation encryption device power supply of communication line, described base connects slot, described handle connects slot, described socket connects slot, described connection slot, described power supply slot all communicates to connect with described Audio Processing Unit;
Be provided with the control button that carries out voice encryption for the control Audio Processing Unit on the described housing, described control button is connected with described Audio Processing Unit circuit.
Described conversation encryption device, wherein, described Audio Processing Unit comprises for the first chip that voice are encrypted, for the second chip that encrypted speech is decrypted, for microprocessor, dual-audio transmission circuit, ring detecting circuit and the off-hook detection circuit of controlling described Audio Processing Unit operation;
Described the first chip is connected with described the second chip communication, described the first chip, described the second chip all are connected with described microprocessor communication, and described dual-audio transmission circuit, described ring detecting circuit, described off-hook detection circuit all are connected with described microprocessor.
A kind of encryption call method provided by the invention and conversation encryption device utilize encryption chip that voice are carried out frequency saltus step coding encrypting, but the length that will determine the starting point of this voice sequence and each voice segments are very difficult; Even the listener-in uses identical communicator, and be provided with identical password, can not realize eavesdropping; A kind of situation is off-hook eavesdropping after caller and the called speech scrambling, because wiretap does not have and the caller phone machine communicates contact, can not enter the encrypted work state, can only eavesdrop in normal non-encrypted mode; Another kind of situation is the caller dialing, called and simultaneously ring of tap phone, if listener-in elder generation off-hook, tap phone becomes called phone.Although at this moment can not hear all, in case the listener-in's identity of conversing has just exposed, improved the confidentiality in the communication process, and conversation encryption device complex structure of the present invention, reduced manufacturing cost.
Description of drawings
Fig. 1 is the schematic flow sheet of encryption call method among the present invention;
Fig. 2 is the structural representation that the conversation encryption device is connected with Telephone set among the present invention;
Fig. 3 is the structural representation of Audio Processing Unit among the present invention;
Fig. 4 is that the circuit structure of the embodiment of conversation encryption device among the present invention is always schemed;
Fig. 5 is the electrical block diagram of voice encryption circuit among Fig. 4;
Fig. 6 is the electrical block diagram of microprocessor among Fig. 4;
Fig. 7 is the electrical block diagram of dual-audio transmission circuit among Fig. 4.
Embodiment
The invention provides a kind of encryption call method and conversation encryption device, clearer, clear and definite for making purpose of the present invention, technical scheme and effect, below the present invention is described in more detail.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
The invention provides a kind of encryption call method, as shown in Figure 1, it specifically may further comprise the steps:
Step 101: the communications band of main dialing telephone and called phone is divided into 32 codings, described main dialing telephone and described called phone use any coding in described 32 codings when beginning to converse, after the conversation beginning next used another coding in described 32 codings constantly, in communication process, use all the time the coding in described 32 codings to be encrypted, until end of conversation;
Wherein, adjacent next time interval between constantly is different, and that uses in each time interval is encoded to arbitrary coding in described 32 codings.
Utilize encryption chip that voice are carried out frequency saltus step coding encrypting, when described main dialing telephone and described called phone when beginning to converse, both sides use the some codings in 32 codings, and next then uses another coding in 32 codings constantly, and the arrangement of coding does not have permanent order; Use the different time intervals during two codings are used, two time interval length is fixing rule not; Caller sets in advance 6 identical decimal system passwords with called encryption device, has ensured the synchronous crypto-operation conversation, so that the fail safe of conversation rises to higher level, under the prerequisite that guarantees to converse clearly, has improved the confidentiality of conversation.And realize that eavesdropping needs accurately this voice sequence to be carried out segmentation, and different codings selected respectively in each section voice, but the length of determining the starting point of this voice sequence and each voice segments is extremely difficult, under the prerequisite of asynchronous employing coding frequency, even use identical coding also can't realize eavesdropping.
In another preferred embodiment of the present invention, what described step 101 was concrete also comprises: select a frequency as the division frequency in the frequency range of audio frequency 300Hz-3300Hz, it is that low-frequency range, split point-3300Hz are set to high band that 300Hz-divides frequency point setting, sub-band in low-frequency range and the high band is carried out anti-phase conversion, form described 32 codings; In communication process, select arbitrary coding in described 32 codings by five parallel-by-bit data wires.
More specifically, the detailed process of the sub-band in low-frequency range and the high band being carried out anti-phase conversion is: the low frequency frequency range in every sub-frequency bands is moved on to the high-frequency frequency range, the high-frequency frequency range is moved on to the low frequency frequency range.
In another preferred embodiment of the present invention, described step 101 also comprises the voice encryption step, and it specifically comprises:
The first chip adopts any coding in described 32 codings that voice signal is transformed to the emission output signal by the emission modulated signal spectrum, and then described the first chip is sent to the second chip with described emission output signal;
The described emission output signal that described the second chip will receive is carried out the conversion frequency spectrum processing, finishes the encryption to voice signal;
Described the first chip controlled by microprocessor and the second chip is encrypted by same transformation period cycle and same coding, has improved the confidentiality of voice call.
The invention provides a kind of conversation encryption device, as shown in Figure 2, it comprises housing 1, and described housing 1 can adopt respective material of the prior art to make, such as high performance plastics.1 is provided with the Audio Processing Unit that is used to voice call encryption and deciphering in the described housing, be provided with on the described housing for the base that connects Telephone set and connect slot 2, be used for connecting the handle connection slot 3 of telephone handle, be used for connecting the socket connection slot 4 of telephone handle socket, be used for connecting the connection slot 5 and the power supply slot 6 that is used for to described conversation encryption device power supply of communication line, described base connects slot 2, described handle connects slot 3, described socket connects slot 4, described connection slot 5, described power supply slot 6 all communicates to connect with described Audio Processing Unit;
Be provided with the control button that carries out voice encryption for the control Audio Processing Unit on the described housing 1, be control button 7 and control button 8 in the present embodiment, and described control button 7 disposes a green indicating lamp 15, described control button 8 configurations one red led 16.Certainly also a control button can only be set as required.Described control button 7, described control button 8 all are connected with described Audio Processing Unit circuit.This conversation encryption device is connected with main dialing telephone, called phone respectively, in the time of need to being encrypted conversation, the user presses control button at described main dialing telephone, make described main dialing telephone enter the voice encryption state, and when encrypted speech is transferred to described called phone, the conversation encryption device of described called phone with the voice deciphering of encrypting, has improved the confidentiality of user in communication process again.
In another preferred embodiment of the present invention, as shown in Figure 3, described Audio Processing Unit comprises for the first chip 9 that voice are encrypted, for the second chip 10 that encrypted speech is decrypted, for the microprocessor 11 of controlling described Audio Processing Unit operation, dual-audio transmission circuit 12, ring detecting circuit 13 and off-hook detection circuit 14;
Described the first chip 9 and 10 communication connections of described the second chip, described the first chip 9, described the second chip 10 all communicate to connect with described microprocessor 11, and described dual-audio transmission circuit 12, described ring detecting circuit 13, described off-hook detection circuit 14 all are connected with described microprocessor.
For more detailed explanation the present invention, as shown in Figure 2, the encryption device of will conversing links together in telephone set 17, and the 9V power supply of 500mA received described power supply slot 6, the outside line plug of registering one's residence connects described connection slot 5, the outer line socket of described telephone set 17 connects described base and connects slot 2, and the handle socket of described telephone set 17 connects described socket and connects slot 4, and the described handle connection of the handle of described telephone set 17 slot 3 links to each other.Running under the various mode of operations of voice encryption system that consist of after described conversation encryption device is connected with described telephone set 17 is described as follows:
The password input
Described conversation encryption device is before for the first time actual conversation of beginning, both sides need to input 6 identical decimal number passwords, password is set to the decimal system password of 4,8,10 or other figure places as required, and later on conversation is unnecessary re-entering then.The password input process is as follows: behind (1) main dialing telephone off-hook, described green indicating lamp 15 is bright, hears dialing tone.(2) press simultaneously described control button 7, described control button more than 8 two seconds, described green indicating lamp 15 is bright with described 16 whiles of red led.(3) hear two longs " tick---, tick---" after, by described telephone set 17 dial keies, input continuously 6 decimal number passwords, finish by the " # " number key again, hear that one short one long two sounds " tick, tick---" illustrates the password input correctly.(4) if occur mistake in the input process, can hear first the alarm of " ticking, tick " of two minors, then two longs " tick---, tick---" indication is re-entered.(5) if find mistake in the input process, can be by " * " number key, hear two longs " tick---, tick---" after, re-enter.
Do not encrypt caller
Not encrypting caller is equivalent to not have described conversation to add the normal telephone communication of closely packed.Communication process is as follows: behind (1) main dialing telephone off-hook, described green indicating lamp 15 is bright, and described red led 16 does not work, and hears dialing tone.(2) on described telephone set 17 keyboards, normally dial the called phone number.(3) put through rear called receiver off-book, if called phone is the ordinary telephone set of not encrypting, directly conversation.(4) if called phone has the described conversation encryption device identical with main dialing telephone, can hear long " ticking---" behind the called receiver off-book, then normal talking.
Encrypt caller
The course of work of caller phone machine is as follows under the speech scrambling pattern: (1) by the main dialing telephone off-hook after, described green indicating lamp 15 is bright, described red led 16 does not work, and hears dialing tone.(2) click described control button 8, described green indicating lamp 15 extinguishes, and described red led 16 is lighted.(3) normal group called phone telephone number on described telephone set 17 keyboards.(4) put through rear called receiver off-book, if called phone is to have identical described conversation encryption device and have identical password with main dialing telephone, can hear long " ticking---" behind the called receiver off-book.(5) after main dialing telephone is received the long of called phone, also send long " ticking---", be encrypted conversation.
Described conversation encryption device is as follows in the course of work of being listened the phone end: after (1) called phone is received ring back tone, called receiver off-book, this moment, described green indicating lamp 15 was bright, and described red led 16 does not work, and hears that described conversation encryption device sends long " ticking---".(2) if main dialing telephone is the ordinary telephone set do not encrypted or the similar conversation encryption device under the non-encrypted mode of operation, can directly carry out normally not speech scrambling.(3) if main dialing telephone be the similar conversation encryption device under the encryption mode and have identical password, can receive in addition the long " ticking---" that main dialing telephone is sent, described green indicating lamp 15 extinguishes simultaneously, and described red led 16 is lighted, and at this moment is encrypted conversation.
To enumerate a specific embodiment below the present invention and describe in order further to describe, such as Fig. 4, Fig. 5, Fig. 6 and shown in Figure 7, for described the first chip 9 is labeled as U4, described the second chip 10 is labeled as U5, described microprocessor 11 is labeled as U3, and described dual-audio transmission circuit 12 is labeled as U6, and described ring detecting circuit 13 is labeled as U1, described off-hook detection circuit 14 is labeled as U2, and power circuit 18 is labeled as U7.
The voice encryption circuit
As shown in Figure 5, described voice encryption main circuit will be made of U4 and U5, and U4 and U5 all adopt the MX224 integrated circuit.Because MX224 is semiduplex mode, for realizing the full-duplex communication of telephone set, U4 is set to send mode of operation, and U5 is set to receptive pattern.Specifically pass through 8 pin ground connection with U4, the unsettled realization of 8 pin of U5,8 pin have internal pull-up resistor.MX224 provides 32 selectable scrambleds, by the parallel input port control of the A0-A4 of chip.And these parallel lines are connected to the RB0-RB4 pin of microprocessor.Whether U4 and U5 encrypt the level control by pin 9, low-level encryption, and high level is not encrypted.This level is gone out by the RA2 human hair combing waste of U3, and it controls light-emitting diode LD1 simultaneously.The input of encryption chip data and renewal are by the control of the pulse on 11 pin, and this pulse is by the RB5 pin output of microprocessor.After microprocessor is ready to data, under RB5 begins as the low level situation, send a high level, send out a low level again, data just are latched into encryption chip.The chip that is operated under the sending mode is processed the signal that Mike on the Telephone handset produces.The voice signal that Mike produces inputs to the 22 pin TxIN of U4, and the voice signal after the processing outputs to the audio socket of telephone set main frame via 16 pin TxOUT.The chip that is operated under the receiving mode receives that to telephone set voice signal processes.The voice signal of main frame voice socket inputs to the 18 pin RxIN of U5, and the voice signal after the processing outputs to the audio socket of Telephone handset via 15 pin RxOUT.
The function of this part circuit is: under encrypted work pattern not, the TxIN signal that U4 will be input to 22 pin does not carry out conversion, directly sends to the output of 16 pin.Namely TxOUT is identical with TxIN.And the RxOUT of U5 the 18th pin is identical with RxIN on 15 pin.Under the encrypted work pattern, the TxIN signal that U4 will be input to 22 pin carries out Spectrum Conversion, and the voice signal TxOUT after the conversion exports at 16 pin.Carry out the conversion Spectrum Conversion and U5 will be input to the RxIN signal of 18 pin, the voice signal RxOUT after the conversion exports at 15 pin.And under microprocessor control, U4 and U5 are transformed to TxOUT and RxOUT with TxIN and RxIN respectively according to the time cycle of same variation with the scrambled that changes.
The microprocessor-based control circuit
As shown in Figure 6, the main circuit of described microprocessor will comprise switch S 1, S2 and light-emitting diode LD1, the original papers such as LD2.The function of this circuit is to receive the relevant signal that inputs to microprocessor, carries out logic and judges, exports corresponding control signal.The signal of input has: switch S 1, and the S2 state information is by 6 pin and the input of 7 pin of U3; The off hook signal of telephone set and bell signal are by 2 pin and the input of 3 pin; The decoding data of dual-audio transmission circuit, the RC0 to RC3 by 11 pin to 14 pin inputs.The signal of output has: LD1, and the LD2 control signal is by 4 pin and the output of 5 pin; Relay control signal is exported by 18 pin; The coded data of two encryption chips is exported by 21 RB0 to RB4 to 25 pin; Encrypt control level and exported by 4 pin, this level also is the control level of LD1; The control impuls of encryption chip is exported by 26 pin RB5; The coded data of dual-audio transmission circuit is exported by the RC0 to RC3 of 11 pin to 14 pin, and this is 4 bidirectional data lines.
The function of microprocessor-based control circuit is: (1) monitoring telephone power ringing and off hook state, judge caller and called; (2) monitor the key switch state, judge normal talking, speech scrambling and password input pattern; (3) control dual-audio sending and receiving; (4) calculate and select scrambled sequence and time series; (5) be encrypted in real time code and select control.
The dual-audio transmission circuit
As shown in Figure 7, described dual-audio transmission circuit comprises relevant resistance, the original papers such as electric capacity and crystal oscillator.Double-audio signal is by 1 foot meridian capacitor C3 of handle speech socket, and resistance R 10 is input to 2 pin of U6.The signal that the dual-audio chip sends is exported by 8 pin, through the TxOUT signal plus that 16 human hair combing wastes of C5 and encryption chip U4 go out, then gives 4 pin of main station speech socket.3 control signals are by the RC4 of microprocessor, and RC5 and RC6 send, and give respectively 11,10 and 9 pin of U6.4 parallel-by-bit data wire D0, D1, D2, D3 are connected to the RC0 of microprocessor, RC1, RC2, RC3.
When receiving, find to receive when described microprocessor 11 scan-data lines and send control by double-audio signal, through data wire double audio data is input to microprocessor.During transmission, double audio data is given U6 through parallel line, and microprocessor sends suitable control signal, and double-audio signal is exported by 8 pin.
Ring detecting circuit
Described ring detecting circuit is by shown in Fig. 4, and U1 is concrete comprises C1, Z1, Z2, D1, R1, Q1, C2, the original papers such as R3.The effect of C1 is isolated DC, and Z1, Z2 are used for amplitude limit, and D1 is as halfwave rectifier, and U1 is concrete plays buffer action, and Q1, R3, and C2 is sample-and-hold circuit.Bell signal is the sine wave that is interrupted, and voltage is higher, from 2, the 3 pin input of J1.And this circuit ring detection output is DC level, exports to 3 pin of microprocessor through the emitter of triode.
The off-hook detection circuit
This part circuit comprises D3, D4, D5, D6, Z3, R4, the original papers such as U2 and R5.When telephone set does not have off-hook, a higher voltage is arranged, 1, the 2 pin conducting of U2,5 pin output low levels between 2,3 pin of J1.Behind the off-hook, the voltage drop of 2,3 pin of J1,1, the 2 pin conducting of U2,5 pin output high level.This off-hook detection level is given 2 pin of microprocessor.
Power circuit
Power circuit mainly is comprised of a three terminal regulator.Input voltage 9V, electric current are 500mA, and output voltage 5V is for the conversation encryption device among the present invention provides power supply.
The above-mentioned embodiment that enumerates is only for its a kind of embodiment, can certainly be as required each part be wherein carried out accommodation.
Should be understood that application of the present invention is not limited to above-mentioned giving an example, for those of ordinary skills, can be improved according to the above description or conversion that all these improvement and conversion all should belong to the protection range of claims of the present invention.
Claims (6)
1. encryption call method, it may further comprise the steps:
A, the communications band of main dialing telephone and called phone is divided into 32 codings, described main dialing telephone and described called phone use any coding in described 32 codings when beginning to converse, after the conversation beginning next used another coding in described 32 codings constantly, in communication process, use all the time the coding in described 32 codings to be encrypted, until end of conversation;
Wherein, adjacent next time interval between constantly is different, and that uses in each time interval is encoded to arbitrary coding in described 32 codings.
2. encryption call method according to claim 1, it is characterized in that, described steps A also comprises: select a frequency as the division frequency in the frequency range of audio frequency 300Hz-3300Hz, it is that low-frequency range, split point-3300Hz are set to high band that 300Hz-divides frequency point setting, sub-band in low-frequency range and the high band is carried out anti-phase conversion, form described 32 codings; In communication process, select arbitrary coding in described 32 codings by five parallel-by-bit data wires.
3. encryption call method according to claim 2, it is characterized in that, the detailed process of the sub-band in low-frequency range and the high band being carried out anti-phase conversion is: the low frequency frequency range in every sub-frequency bands is moved on to the high-frequency frequency range, the high-frequency frequency range is moved on to the low frequency frequency range.
4. encryption call method according to claim 3 is characterized in that, described steps A also comprises the voice encryption step, and it specifically comprises:
B, the first chip adopt any coding in described 32 codings that voice signal is transformed to the emission output signal by the emission modulated signal spectrum, and then described the first chip is sent to the second chip with described emission output signal;
The described emission output signal that described the second chip will receive is carried out the conversion frequency spectrum processing, finishes the encryption to voice signal;
Described the first chip controlled by microprocessor and the second chip is encrypted by same transformation period cycle and same coding.
5. conversation encryption device, it comprises housing, it is characterized in that, be provided with the Audio Processing Unit that is used to voice call encryption and deciphering in the described housing, be provided with on the described housing for the base that connects Telephone set and connect slot, be used for connecting the handle connection slot of telephone handle, be used for connecting the socket connection slot of telephone handle socket, be used for connecting the connection slot and the power supply slot that is used for to described conversation encryption device power supply of communication line, described base connects slot, described handle connects slot, described socket connects slot, described connection slot, described power supply slot all communicates to connect with described Audio Processing Unit;
Be provided with the control button that carries out voice encryption for the control Audio Processing Unit on the described housing, described control button is connected with described Audio Processing Unit circuit.
6. conversation encryption device according to claim 6, it is characterized in that described Audio Processing Unit comprises for the first chip that voice are encrypted, for the second chip that encrypted speech is decrypted, for microprocessor, dual-audio transmission circuit, ring detecting circuit and the off-hook detection circuit of controlling described Audio Processing Unit operation;
Described the first chip is connected with described the second chip communication, described the first chip, described the second chip all are connected with described microprocessor communication, and described dual-audio transmission circuit, described ring detecting circuit, described off-hook detection circuit all are connected with described microprocessor.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106028318A (en) * | 2016-04-26 | 2016-10-12 | 深圳市金天福科技有限公司 | Voice signal processing method and device |
| CN106162502A (en) * | 2015-03-20 | 2016-11-23 | 北京虎符科技有限公司 | Safe bluetooth communication equipment |
| CN106470202A (en) * | 2015-08-21 | 2017-03-01 | 成都鼎桥通信技术有限公司 | The method of terminal speech encryption and terminal in the Cluster Multimedia system of broadband |
| CN106488047A (en) * | 2016-12-20 | 2017-03-08 | 惠州Tcl移动通信有限公司 | A kind of communicating data transfer control method based on mobile terminal and system |
| CN116321134A (en) * | 2023-05-18 | 2023-06-23 | 成都瑞安云科技股份有限公司 | Call encryption testing method and system for voice call |
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| CN2112913U (en) * | 1991-02-06 | 1992-08-12 | 马肃领 | Long-distance call limiting and recording telephone |
| CN2114246U (en) * | 1992-04-02 | 1992-08-26 | 李幼夫 | Intelligent telephone set with a cipher lock |
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| CN101345965A (en) * | 2008-08-29 | 2009-01-14 | 中国电信股份有限公司 | Encryption call method based on speech code stream and mobile terminal |
| CN101909290A (en) * | 2010-08-25 | 2010-12-08 | 中兴通讯股份有限公司 | Method, system and mobile terminal for encrypting voice call |
| CN102065169A (en) * | 2011-01-10 | 2011-05-18 | 长春卓尔信息安全产业股份有限公司 | Method and device for encrypting telephone |
| CN201995006U (en) * | 2011-01-10 | 2011-09-28 | 长春卓尔信息安全产业股份有限公司 | Encryption device for telephone set |
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| CN106162502A (en) * | 2015-03-20 | 2016-11-23 | 北京虎符科技有限公司 | Safe bluetooth communication equipment |
| CN106470202A (en) * | 2015-08-21 | 2017-03-01 | 成都鼎桥通信技术有限公司 | The method of terminal speech encryption and terminal in the Cluster Multimedia system of broadband |
| CN106028318A (en) * | 2016-04-26 | 2016-10-12 | 深圳市金天福科技有限公司 | Voice signal processing method and device |
| CN106488047A (en) * | 2016-12-20 | 2017-03-08 | 惠州Tcl移动通信有限公司 | A kind of communicating data transfer control method based on mobile terminal and system |
| CN106488047B (en) * | 2016-12-20 | 2020-08-11 | 惠州Tcl移动通信有限公司 | Call data transmission control method and system based on mobile terminal |
| CN116321134A (en) * | 2023-05-18 | 2023-06-23 | 成都瑞安云科技股份有限公司 | Call encryption testing method and system for voice call |
| CN116321134B (en) * | 2023-05-18 | 2023-09-08 | 成都瑞安云科技股份有限公司 | Call encryption testing method and system for voice call |
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Application publication date: 20130320 |