CN101014060B - Voice encryption method for GSM handset with anti longterm prediction rule pulse excitation compression coding - Google Patents
Voice encryption method for GSM handset with anti longterm prediction rule pulse excitation compression coding Download PDFInfo
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Abstract
The invention relates to one anti-long time prediction rules impulse excitation compression codes global cell phone language coding method, which comprises the following steps: connecting cell phone language coding and decoding modules for coding computation to realize decoding function between A/D module and decoding module, wherein, the said decoding and coding module is one digital signal minimum system hardware module and the DSP process module is to process language signals coding computation; the power module is connected to power interface of DSP process module.
Description
Technical field
The present invention is a kind of Global Link (GSM) mobile phone end-to-end speech ciphering method.It is based on anti-long-term prediction Regular-Pulse Excitation (RPE-LTP) compressed encoding voice encryption algorithm, and adopting Digital Signal Processing (DSP) chip TMS320C5402 is basic platform, is a kind of End-to-End Security communication means of wireless network terminal.
Background technology
Along with the develop rapidly of mobile communication technology, the particularly gsm system extensive use in the whole world, the demand for security of GSM mobile handset communication is just growing, and the user is also more and more higher to the requirement of mobile phone secure communication.Though exist comparatively complete mobile phone secure communication standard and the technology of a cover in the gsm system of standard, but owing to only adopt the wireless channel encryption technology, can only guarantee the coded communication of mobile phone voice signal to the wireless transmission process between the base station, be still in the relay processes of voice signal between the base station with the transmission of plaintext form, therefore can't guarantee voice safety encipher communication end to end between mobile phone.In case the assailant can insert or control the relay transmission system of carrier network, whole user's communications content will expose undoubtedly.Simultaneously,, have the individual and the department of high secure communication requirement, in communication process, also exist suitable potential safety hazard for some because operator can monitor the communication flows between net at any time.
Given this, successively there are the research institution and the group of countries such as Germany, Israel, the U.S. to study in recent years in the GSM mobile handset End-to-End Security communications field, and the GSM network encryption terminal end to end that released one after another.Wherein German GSMK company adopts the voice encryption technology of its exploitation in November, 2003, has issued the voice encryption mobile phone of Cryptophone by name; The Snapshield of Israel company has proposed a kind of voice encryption technology based on the GSM smart mobile phone at the beginning of 2005; The TCC company of the U.S. has also released the encryption mobile phone CipherTalk-8000 that adopts the voice encryption technology in 2006.Domestic also have some to resemble sky, Beijing to be just accord with mechanisms such as Commercial Secret Protection center, released product separately based on external similar technology.
Yet, voice encryption technology such as employings such as German GSMK, Israel Snapshield, U.S. TCC and sky, Beijing are just accord with, all be based on traditional cryptography encryption technology (DES, 3DES, AES etc.), digital signal carried out encrypted transmission by the data channel of GSM network.Promptly at first digitization of speech signals, and, digitized signal is encrypted, adopt VOIP (VoiceOver IP) technology to transmit then by means of the data channel (as GPRS passage etc.) of GSM network.The advantage of this class encryption method is that the RPE-LTP vocoder that can avoid in the voice channel (is learned encryption technology data encrypted signal owing to adopt conventional cipher, behind the vocoder compressed coding of RPE-LTP, can't decryption restoration), technical being easy to realized, and mode is flexible, technology numerous (because of the cryptography encryption method differences that adopt).But this class technology also exists obvious defects: the first, can't overcome owing to set up the latency issue that IP connects and the utilization automatic retransmission mechanism causes, and the time-delay that wherein connects can reach 20-30 second, handles time-delay 0.5-1 second, therefore has a strong impact on communication effect.The second, therefore such technology exists the problem of interoperability based on the GSM data channel by different operators and international network the time, and inter-network can not interconnect.The 3rd, do not support the value-added service of existing GSM, can not use some other value-added services of existing phonecard and mobile network as the two ends of data passage.
Summary of the invention
Technical problem: the objective of the invention is to propose a kind of " anti-long-term prediction Regular-Pulse Excitation (RPE-LTP) compressed encoding Global Link (GSM) mobile phone speech encryption method " of directly encrypting and transmitting in the enterprising lang message of GSM traditional voice passage source, this method has the ability of anti-RPE-LTP compressed encoding, therefore can overcome all defect that adopts said GSM data channel encryption technology.Adopt technology of the present invention, at first can provide GSM to encrypt the communication of mobile phone End-to-End Security; Secondly can significantly reduce conversation delay (0.2 second); And, support the interconnection and interflow of inter-network owing to do not change the characteristic of voice channel in the gsm system; Support all value-added services in the existing GSM network simultaneously.In addition, during principle of the present invention can be expanded equally and be applied to 3G (Third Generation) Moblie network (3G) and CDMA1X mobile network's voice encryption is communicated by letter.
Technical scheme: GoTone handset with anti longterm prediction rule pulse excitation compression coding speech ciphering method of the present invention is between the mould of Global Link mobile phone speech communication system/digital-to-analogue piece and long-term prediction Regular-Pulse Excitation coding/decoding module, insert mobile phone speech enciphering/deciphering module, carry out the voice encryption computing, realize the voice encryption function; Wherein, described mobile phone speech enciphering/deciphering module is a Digital Signal Processing minimum system hardware module, mainly comprises: dsp processor module, power module, clock module, RAM memory module and ROM memory module; Described dsp processor module is as the core of hardware system, the encryption and decryption computing of processes voice signals; Power module connects the power interface of dsp processor module, is responsible for power supply; Clock module connects the clock interface of dsp processor module, for the dsp processor module provides the impulse hunting ripple; The RAM memory module connects the RAM memory interface of dsp processor module, for dsp processor module operate as normal provides memory space; The ROM memory module connects the ROM memory interface of dsp processor module, makes dsp processor module loading system software when initialization.
Comprise a voice encryption method in the internal memory of dsp processor module; This voice encryption method is moved voice decomposition/composition algorithm module, voice encryption/decryption algorithm module, class phonetic synthesis/decomposition algorithm module and voice signal synchronization module respectively, thereby realizes the encryption and decryption communication of mobile phone speech; Concrete grammar is:
1.) system initialization: in the system initialization process, finish at first that DSP is configured to and the configuration of clock, memory interface etc.,
2.) send data: when having the transmission data of mould/digital-to-analogue piece input, at first move voice decomposition/composition algorithm module, data-signal is resolved into a certain size frame; Then move voice encryption/decryption algorithm module, the voice of minute frame are encrypted by ad hoc fashion; Move class phonetic synthesis/decomposition algorithm module then, the class voice after encrypting are synthesized in modes such as paraphase; Move the voice signal synchronization module at last, synthetic speech-like signal is added specific synchronizing signal head, then output;
3.) receive data: when having the reception data of RPE-LTP coding/decoding module decoding input, at first move the voice signal synchronization module, judge whether that picked up signal is synchronous, if not, then carry out synchronous computing again, if then then move subsequent module; Then move class phonetic synthesis/decomposing module, the signal is synchronously carried out the decomposition of class voice in modes such as paraphase; Move voice encryption/decryption algorithm module then, signal is decrypted by ad hoc fashion; Move voice decomposition/composition algorithm module at last, the voice signal frame after the deciphering is synthesized by a certain size, then output.
Described voice decomposition/composition algorithm module comprises main program to be called, sends/receive several steps such as the input of data, buffer memory, frame decompositions/composition algorithm and output, and realize the decomposition of voice and synthesize; Concrete grammar is:
1.) main program calls: during system operation voice decomposition/composition algorithm module, main program calls this module and transports etc.,
2.) send data: when data need send, at first data are carried out the buffer memory input, adopt the frame decomposition algorithm that data are carried out the branch frame then, good Frame is decomposed in output at last;
3.) receive data: after receiving data, at first data are carried out the buffer memory input, adopt the frame composition algorithm that Frame is synthesized then, the data after output at last is synthetic.
Described voice encryption/decryption algorithm module comprises main program to be called, sends/receive that the input of data, buffer memory, enciphering/deciphering parameter are determined, several steps such as matrix encryption/decryption algorithm and output, realize the encryption and decryption of voice; Concrete grammar is:
1.) main program calls: when system moved voice encryption/decryption algorithm module, main program called this module and carries out the enciphering/deciphering computing,
2.) send data: when data need send, at first data are carried out the buffer memory input, then determine to adopt the matrix cryptographic algorithm that data are encrypted by encryption parameter then, export data encrypted at last;
3.) receive data: after receiving data, at first data are carried out the buffer memory input, then determine to adopt the matrix decipherment algorithm that data are decrypted by deciphering parameter then the data after the output deciphering at last.
Described class phonetic synthesis/decomposition algorithm module comprises main program to be called, sends/receive several steps such as data, inverted order, the mapping transformation/inverse transformation of class voice, voice enhancing and output, realize the synthetic and decomposition of class voice; Concrete grammar is:
1.) main program calls: during system operation class phonetic synthesis/decomposition algorithm module, main program call this module carry out the class voice synthetic/decompose,
2.) send data: when data need send, at first data are carried out inverted order, then data are carried out the mapping transformation of class voice, adopt voice to strengthen then, the class speech data after output at last is synthetic;
3.) receive data: after receiving data, at first data are carried out class voice mapping inverse transformation, then data are carried out inverted order, adopt voice to strengthen then, the speech data after output is decomposed at last.
Described voice signal synchronized algorithm module comprises main program to be called, sends/receive data, sync waveform parameter to determine/the sync correlation computing, add/remove several steps such as synchronous head and output, realize the synchronized transmission and the reception of signal; Concrete grammar is:
1.) main program calls: when system moved voice signal synchronized algorithm module, main program called synchronized transmission and the reception that this module is carried out signal,
2.) send data: when data need send, at first determine the sync waveform parameter, add synchronous head then, output at last has the data of synchronizing signal;
3.) receive data: after receiving data, at first carry out the sync correlation computing, remove synchronous head then, export pure data at last.
Beneficial effect: the anti-long-term prediction Regular-Pulse Excitation of the present invention compressed encoding Global Link (GSM) mobile phone speech encryption method has good functional characteristics: realized GSM mobile handset secure communication end to end, Cipher Strength is not less than 3DES; After encryption and decryption, the intelligibility of voice signal is not suffered a loss, and tonequality reaches the requirement of GSM network, conversation intelligibility 〉=99%; Satisfy the real-time requirement of communication, being applied to the GSM network does not have delay, processing delay≤200ms; Support the interconnection and interflow of inter-network and all value-added services in the existing GSM network.In addition, based on identical voice encryption principle, realizing that some parameter of technical modification promptly can be applicable among 3G and the CDMA 1X mobile network.
Description of drawings
Fig. 1 is the application structure figure of the inventive method in the Global Link mobile phone;
Fig. 2 is the systematic schematic diagram of the inventive method;
Fig. 3 is soft, the hardware module graph of a relation of the inventive method;
Fig. 4 is an electrical schematic diagram;
Fig. 5 is the systems soft ware flow chart of the inventive method.
Fig. 6 is a voice decomposition/composition algorithm module flow chart.
Fig. 7 is a voice encryption/decryption algorithm module flow chart.
Fig. 8 is class phonetic synthesis/decomposition algorithm module flow chart.
Fig. 9 is a voice signal synchronized algorithm module flow chart.
Embodiment
Global Link (GSM) the mobile phone speech encryption method of the anti-long-term prediction Regular-Pulse Excitation of the present invention (RPE-LTP) compressed encoding adopts unique hardware cut-in method, comprises two parts of DSP minimum system hardware module and software system module.
Wherein:
1. the present invention inserts mobile phone speech enciphering/deciphering module between mould/number (A/D) module and RPE-LTP coding/decoding module of Global Link (GSM) mobile phone speech communication system, thus operation voice encryption algorithm.
2. DSP minimum system hardware module of the present invention mainly comprises following submodule:
1) a dsp processor module 1:TMS320C5402 comprises 16 fixed-point processors at least, has independently program and data space, is used for the encryption and decryption computing.
2) power module 2: two groups of voltages are provided at least, are peripheral hardware power supply on dsp chip kernel and the sheet.
3) clock module 3: produce system clock.
4) the RAM memory module 4: for system extends out program and data field.
5) the ROM memory module 5: be used for program curing.
3. software system module of the present invention comprises:
1) voice decomposition/composition algorithm module 6: voice signal is resolved into suitable frame size, synthesize so that in follow-up class phonetic synthesis algorithm, carry out signal effectively.
2) voice encryption/decryption algorithm module 7: the voice signal that decomposes is carried out encryption and decryption, guarantee that Cipher Strength reaches the requirement of 3DES.
3) class phonetic synthesis/decomposition algorithm module 8: the synthetic signal that meets the RPE-LTP coding requirement of the signal after will encrypting, be convenient to effectively decode at receiving terminal.
4) voice signal synchronized algorithm module 9: be used for the synchronous reception and the recovery of receiving end signal.
Below in conjunction with accompanying drawing, the structure and the flow process of each module of the inventive method is elaborated.The inventive method is a kind of GoTone handset with anti longterm prediction rule pulse excitation compression coding speech ciphering method.
Concrete grammar is:
Between the mould/digital-to-analogue piece and long-term prediction Regular-Pulse Excitation coding/decoding module of Global Link mobile phone speech communication system, insert mobile phone speech enciphering/deciphering module, carry out the voice encryption computing, realize the voice encryption function; Wherein, described mobile phone speech enciphering/deciphering module is a Digital Signal Processing minimum system hardware module, mainly comprises: dsp processor module 1, power module 2, clock module 3, RAM memory module 4 and ROM memory module 5; Described dsp processor module 1 is as the core of hardware system, the encryption and decryption computing of processes voice signals; Power module 2 connects the power interface of dsp processor module 1, is responsible for power supply; Clock module 3 connects the clock interface of dsp processor module 1, for dsp processor module 1 provides the impulse hunting ripple; RAM memory module 4 connects the RAM memory interface of dsp processor module 1, for dsp processor module 1 operate as normal provides memory space: ROM memory module 5 connects the ROM memory interface of dsp processor module 1, makes dsp processor module 1 loading system software when initialization.Comprise a voice encryption method in the internal memory of dsp processor module 1; This voice encryption method is moved voice decomposition/composition algorithm module 6, voice encryption/decryption algorithm module 7, class phonetic synthesis/decomposition algorithm module 8 and voice signal synchronization module 9 respectively, thereby realizes the encryption and decryption communication of mobile phone speech; Concrete grammar is:
1.) system initialization: in the system initialization process, finish at first that DSP is configured to and the configuration of clock, memory interface etc.,
2.) send data: when having the transmission data of mould/digital-to-analogue piece input, at first move voice decomposition/composition algorithm module 6, data-signal is resolved into a certain size frame; Then move voice encryption/decryption algorithm module (7), the voice of minute frame are encrypted by ad hoc fashion; Move class phonetic synthesis/decomposition algorithm module (8) then, the class voice after encrypting are synthesized in modes such as paraphase; Move voice signal synchronization module (9) at last, synthetic speech-like signal is added specific synchronizing signal head, then output;
3.) receive data: when having the reception data of RPE-LTP coding/decoding module decoding input, at first move voice signal synchronization module 9, judge whether that picked up signal is synchronous, if not, then carry out synchronous computing again, if then then move subsequent module; Then move class phonetic synthesis/decomposing module 8, the signal is synchronously carried out the decomposition of class voice in modes such as paraphase; Move voice encryption/decryption algorithm module 7 then, signal is decrypted by ad hoc fashion; Move voice decomposition/composition algorithm module 6 at last, the voice signal frame after the deciphering is synthesized by a certain size, then output.
The model of described dsp processor module 1 is TMS320C5402.Described power module 2 provides two kinds of voltage: 1.8V and 3.3V; (the output clock is 20MHz to described clock module, after dsp processor module 1 internal interface " PLL " 5 frequencys multiplication, makes dsp processor module 1 be operated in 100MHz.
Described voice decomposition/composition algorithm module 6 comprises main program to be called, sends/receive several steps such as the input of data, buffer memory, frame decompositions/composition algorithm and output, and realize the decomposition of voice and synthesize; Concrete grammar is:
1.) main program calls: when system moved voice decomposition/composition algorithm module, main program called this module and carries out computing,
2.) send data: when data need send, at first data are carried out the buffer memory input, adopt the frame decomposition algorithm that data are carried out the branch frame then, good Frame is decomposed in output at last;
3.) receive data: after receiving data, at first data are carried out the buffer memory input, adopt the frame composition algorithm that Frame is synthesized then, the data after output at last is synthetic.
Described voice encryption/decryption algorithm module 7 comprises main program to be called, sends/receive that the input of data, buffer memory, enciphering/deciphering parameter are determined, several steps such as matrix encryption/decryption algorithm and output, realize the encryption and decryption of voice; Concrete grammar is:
1.) main program calls: when system moved voice encryption/decryption algorithm module, main program called this module and carries out the enciphering/deciphering computing,
2.) send data: when data need send, at first data are carried out the buffer memory input, then determine to adopt the matrix cryptographic algorithm that data are encrypted by encryption parameter then, export data encrypted at last;
3.) receive data: after receiving data, at first data are carried out the buffer memory input, then determine to adopt the matrix decipherment algorithm that data are decrypted by deciphering parameter then the data after the output deciphering at last.
Described class phonetic synthesis/decomposition algorithm module 8 comprises main program to be called, sends/receive several steps such as data, inverted order, the mapping transformation/inverse transformation of class voice, voice enhancing and output, realize the synthetic and decomposition of class voice; Concrete grammar is:
1.) main program calls: during system operation class phonetic synthesis/decomposition algorithm module, main program call this module carry out the class voice synthetic/decompose,
2.) send data: when data need send, at first data are carried out inverted order, then data are carried out the mapping transformation of class voice, adopt voice to strengthen then, the class speech data after output at last is synthetic;
3.) receive data: after receiving data, at first data are carried out class voice mapping inverse transformation, then data are carried out inverted order, adopt voice to strengthen then, the speech data after output is decomposed at last.
Described voice signal synchronized algorithm module 9 comprises main program to be called, sends/receive data, sync waveform parameter to determine/the sync correlation computing, add/remove several steps such as synchronous head and output, realize the synchronized transmission and the reception of signal; Concrete grammar is:
1.) main program calls: when system moved voice signal synchronized algorithm module, main program called synchronized transmission and the reception that this module is carried out signal,
2.) send data: when data need send, at first determine the sync waveform parameter, add synchronous head then, output at last has the data of synchronizing signal;
3.) receive data: after receiving data, at first carry out the sync correlation computing, remove synchronous head then, export pure data at last.
System architecture as shown in Figure 1 as can be known, the inventive method adopts unique hardware cut-in method, in GSM mobile handset voice channel system usually, increases and realizes mobile phone speech enciphering/deciphering module, its access point is between A/D module and the RPE-LTP coding/decoding module.Use patented method of the present invention, the voice after the A/D conversion carried out information source encrypt, send into the RPE-LTP coding/decoding module then and carry out compressed encoding, through interweave, wireless channel is encrypted, modulation, last radio frequency sends; Similarly, when the mobile phone received signal, the signal after the decompression of RPE-LTP coding/decoding module is carried out the information source deciphering, after export voice after the D/A conversion.
The GSM mobile handset speech ciphering method of anti-RPE-LTP compressed encoding as shown in Figure 2 mainly comprises the two large divisions: DSP minimum system hardware module and software system module.Wherein, DSP minimum system hardware module partly comprises dsp processor module 1, power module 2, clock module 3, RAM memory module 4 and ROM memory module 5; Software system module then is made up of voice decomposition/composition algorithm module 6, voice encryption/decryption algorithm module 7, class phonetic synthesis/decomposition algorithm module 8 and voice signal synchronized algorithm module 9.
The inventive method to the encryption and decryption process of voice signal is: after system powers on, at first carry out boot, with the program designation that solidifies in the ROM memory module 5 in sheet or outside the sheet in the RAM memory module 4, jump to system program then, after finishing initialization and peripheral configuration, carry out user program.Voice encryption process of transmitting: in the DSP minimum system,, behind the A/D unscented transformation,, send into dsp processor module 1 by McBSP interface (wherein McBSP is operated in dma mode with the clock stop mode) by the voice signal that the GSM mobile handset voice input module is introduced.Dsp processor module 1 is successively called voice decomposition/composition algorithm module 6, voice encryption/decryption algorithm module 7 and class phonetic synthesis/decomposition algorithm module 8, voice signal is encrypted, and the synthetic speech-like signal that meets the RPE-LTP encoding characteristics, the RPE-LTP coding/decoding module of delivering to mobile phone by the McBSP serial ports after adding the synchronizing signal head carries out compressed encoding, through interweave, wireless channel is encrypted, GMSK (Guassian Minimum Shift Keying) GMSK modulation, after radio frequency processing export by antenna.Voice deciphering receiving course is the inverse process of above-mentioned process of transmitting.
Dsp processor in the inventive method, the TMS320C5402 of employing American TI Company.It is a 16 fixed-point DSP chip, is built-in with 16K*16 position RAM, 4K*16ROM, two McBSP serial ports have one 16 bit data bus, three 16 bit data bus, article 4,16 bit address buses, independently program and data space, the sequential operation ability is up to 200MIPS (million VAX Instructions Per Second VAXs).Power module 2 is used for the power supply to system, and two kinds of voltage: 1.8V and 3.3V are provided, and wherein 3.3V is peripheral hardware power supply on the dsp chip sheet, and 1.8V is a core voltage.Kind when clock module 3 provides for system, crystal output clock wherein is 20MHz, after the PLL of DSP inside 5 frequencys multiplication, makes the C5402DSP chip operation at 100MHz.RAM memory module 4 extends out program and data field for system, but working procedure and store data.ROM memory module 5 is used for program curing, makes system's energy offline operation.
The system of the inventive method is soft, the relation between hardware module as shown in Figure 3.Behind the system program that dsp processor solidifies in loading ROM memory module 5, by the data after the McBSP serial port module input handset A/D sampling, under DMA control, call in voice decomposition/composition algorithm module, voice encryption/decryption algorithm module and class phonetic synthesis/decomposition algorithm module, to the input voice decompose, encryption, class phonetic synthesis, add the synchronizing signal head at last, under DMA control, export the RPE-LTP compressed encoding module that enters mobile phone through the McBSP serial port module.The receiving and deciphering process of voice is inverse process of above-mentioned ciphering process, data after dsp processor decompresses from RPE-LTP by McBSP serial port module input handset, under DMA control, call in voice signal synchronized algorithm module, after finishing the signal Synchronization processing, call in class phonetic synthesis/decomposition algorithm module, voice encryption/decryption algorithm module and voice decomposition/composition algorithm module, the input voice are carried out the class voice to be decomposed, decipher, synthesizes, export through the McBSP serial port module under DMA control at last, the D/A module that enters mobile phone is carried out voice output.
Voice decomposition/composition algorithm module in the inventive method, the voice decomposition/synthetic frame size of employing is 1-20ms; Voice encryption/decryption algorithm module, it is 5-30 that the enciphering/deciphering of employing is handled frame number; Class phonetic synthesis/minute algoritic module adopts technology such as inverted order, the mapping transformation of class voice, voice enhancing, realizes the voice encryption of anti-long-term prediction Regular-Pulse Excitation compression; The voice signal synchronization module is used to the voice after the encryption to provide synchronously, and by choosing the sine wave of a definite form, frequency makes receiving terminal received signal synchronously between 100-400QHz.
Provide the example (referring to Fig. 4) that the inventive method is used below in the GD of Panasonic 90 mobile phones.Signal processing in this mobile phone speech passage is finished by chip TCM4400E is unified.As shown in Figure 4, by adding the mobile phone speech enciphering/deciphering module (structure is referring to Fig. 2) that realizes by the inventive method, thereby realize the safety encipher communication of the GSM mobile handset sound end-to-end of anti-RPE-LTP compressed encoding.The whole technique implementation procedure is as follows;
The voice signal ascender: voice are exported from microphone MIC, send into 27,28 pins of TCM4400E chip, behind filtering and A/D sample quantization, sound signal stream is under 16 pin VCLK (clock signal) and 13 pin VFS (synchronizing signal) effect, export McBSP serial input port the mobile phone speech enciphering/deciphering module (structure is referring to Fig. 2) to from 14 pin VDX, in the TMS320C5402 system, carry out voice decomposition as described in Figure 3, encryption and class phonetic synthesis, after adding the synchronizing signal head, coded signal is exported.Signal exports 4 pin BDR of TCM4400E chip to, the RPE-LPT that handles this signal by the TCM4400E chip encodes, interweaves, wireless channel is encrypted, the GMSK modulation, send into the external radio frequency chip by the 56--59 pin at last, after radio frequency processing, export by antenna for mobile phone.
Voice signal descender: antenna for mobile phone received signal, the input radio frequency processing module, pass through the 51-54 pin of TCM4400E chip then, carry out the GMSK demodulation, the wireless channel deciphering, deinterleave, Base-Band Processing such as RPE-LPT decoding, the gained voice flow is by 3 pins of McBSP mouth, under 2 pin BCLKX (clock signal) and 1 pin BFSX (synchronizing signal) effect, McBSP serial input port in the input handset voice enciphering/deciphering module, carrying out as described in Figure 3 in the TMS320C5402 system, signal Synchronization detects, the class voice decompose, deciphering, phonetic synthesis, the voice signal output after will deciphering then.Output signal to 15 pin VDR of TCM4400E chip,, export receiver EAR PHONE to by 32,33 pins at last through D/A conversion and filtering.
As Fig. 5, the systems soft ware operational process of the technology of the present invention is as follows: system carries out initialization procedure in the back that powers on, and finishes at first that DSP is configured to and the configuration of clock, memory interface etc.When having the transmission data of D/A module input, at first move voice decomposition/composition algorithm module (6), data-signal is resolved into a certain size frame; Then move voice encryption/decryption algorithm module (7), the voice of minute frame are encrypted by ad hoc fashion; Move class phonetic synthesis/decomposition algorithm module (8) then, the class voice after encrypting are synthesized in modes such as paraphase; Move voice signal synchronization module (9) at last, synthetic speech-like signal is added specific synchronizing signal head, then output.When having the reception data of RPE-LTP coding/decoding module decoding input, at first move voice signal synchronization module (9), it is synchronous to remove the synchronous head picked up signal; Then move class phonetic synthesis/decomposing module (8), the signal is synchronously carried out the decomposition of class voice in modes such as paraphase; Move voice encryption/decryption algorithm module (7) then, signal is decrypted by ad hoc fashion; Move voice decomposition/composition algorithm module (6) at last, the voice signal frame after the deciphering is synthesized by a certain size, then output.
Should be understood that; for those of ordinary skills; can according to the preferred embodiment of the technology of the present invention with and technical conceive make various possible changes or replacement, and all these changes or replace the protection range that all should belong to claims of the present invention.
Encryption method at the 1-6 of chip TCM4400E pin and 13-16 pin, inserts voice enciphering/deciphering system at the GD of Panasonic 90 mobile phones, realizes the end-to-end encrypted communication of mobile phone.
Claims (5)
1. an anti-long-term prediction Regular-Pulse Excitation compressed encoding mobile phone speech encryption method is characterized in that the program of this voice encryption method is arranged in the dsp processor module (1); This voice encryption method is moved voice decomposition/composition algorithm module (6), voice encryption/decryption algorithm module (7), class phonetic synthesis/decomposition algorithm module (8) and voice signal synchronization module (9) respectively, thereby realizes the encryption and decryption communication of mobile phone speech; Concrete grammar is:
1.) system initialization: in the system initialization process, finish at first that DSP is configured to and the configuration of clock, memory interface etc.,
2.) send data: when having the transmission data of mould/digital-to-analogue piece input, at first move voice decomposition/composition algorithm module (6), data-signal is resolved into a certain size frame; Then move voice encryption/decryption algorithm module (7), the voice of minute frame are encrypted by ad hoc fashion; Move class phonetic synthesis/decomposition algorithm module (8) then, the class voice after encrypting are synthesized in the paraphase mode; Move voice signal synchronization module (9) at last, synthetic speech-like signal is added specific synchronizing signal head, then output;
3.) receive data: when having the reception data of anti-long-term prediction Regular-Pulse Excitation coding/decoding module decoding input, at first move voice signal synchronization module (9), judge whether that picked up signal is synchronous, if not, then carry out synchronous computing again, if then then move subsequent module; Then move class phonetic synthesis/decomposing module (8), the signal is synchronously carried out the decomposition of class voice in the paraphase mode; Move voice encryption/decryption algorithm module (7) then, signal is decrypted by ad hoc fashion; Move voice decomposition/composition algorithm module (6) at last, the voice signal frame after the deciphering is synthesized by a certain size, then output.
2. anti-long-term prediction Regular-Pulse Excitation compressed encoding mobile phone speech encryption method according to claim 1 is characterized in that the main program in the described voice decomposition/composition algorithm module (6) calls, sends/receives data, buffer memory input, frame decompositions/composition algorithm and output realizing the decomposition of voice and synthesizing; Concrete grammar is:
1.) main program calls: when system moved voice decomposition/composition algorithm module, main program called this module and carries out computing,
2.) send data: when data need send, at first data are carried out the buffer memory input, adopt the frame decomposition algorithm that data are carried out the branch frame then, good Frame is decomposed in output at last;
3.) receive data: after receiving data, at first data are carried out the buffer memory input, adopt the frame composition algorithm that Frame is synthesized then, the data after output at last is synthetic.
3. anti-long-term prediction Regular-Pulse Excitation compressed encoding mobile phone speech encryption method according to claim 1, it is characterized in that main program in the described voice encryption/decryption algorithm module (7) call, send/receive that data, buffer memory input, enciphering/deciphering parameter are determined, matrix encryption/decryption algorithm and output, realize the encryption and decryption of voice; Concrete grammar is:
1.) main program calls: when system moved voice encryption/decryption algorithm module, main program called this module and carries out the enciphering/deciphering computing,
2.) send data: when data need send, at first data are carried out the buffer memory input, then determine to adopt the matrix cryptographic algorithm that data are encrypted by encryption parameter then, export data encrypted at last;
3.) receive data: after receiving data, at first data are carried out the buffer memory input, then determine to adopt the matrix decipherment algorithm that data are decrypted by deciphering parameter then the data after the output deciphering at last.
4. anti-long-term prediction Regular-Pulse Excitation compressed encoding mobile phone speech encryption method according to claim 1, it is characterized in that the main program in described class phonetic synthesis/decomposition algorithm module (8) calls, sends/receives data, inverted order, the mapping transformation/inverse transformation of class voice, voice strengthen and export the synthetic and decomposition of realization class voice; Concrete grammar is:
1.) main program calls: during system operation class phonetic synthesis/decomposition algorithm module, main program call this module carry out the class voice synthetic/decompose,
2.) send data: when data need send, at first data are carried out inverted order, then data are carried out the mapping transformation of class voice, adopt voice to strengthen then, the class speech data after output at last is synthetic;
3.) receive data: after receiving data, at first data are carried out class voice mapping inverse transformation, then data are carried out inverted order, adopt voice to strengthen then, the speech data after output is decomposed at last.
5. anti-long-term prediction Regular-Pulse Excitation compressed encoding mobile phone speech encryption method according to claim 1, it is characterized in that main program in the described voice signal synchronized algorithm module (9) call, send/receive data, sync waveform parameter to determine/the sync correlation computing, add/remove synchronous head and output, realize the synchronized transmission and the reception of signal; Concrete grammar is:
1.) main program calls: when system moved voice signal synchronized algorithm module, main program called synchronized transmission and the reception that this module is carried out signal,
2.) send data: when data need send, at first determine the sync waveform parameter, add synchronous head then, output at last has the data of synchronizing signal;
3.) receive data: after receiving data, at first carry out the sync correlation computing, remove synchronous head then, export pure data at last.
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| CN200710019924A CN101014060B (en) | 2007-02-02 | 2007-02-02 | Voice encryption method for GSM handset with anti longterm prediction rule pulse excitation compression coding |
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| CN101847427A (en) * | 2010-03-08 | 2010-09-29 | 深圳市同洲电子股份有限公司 | Recorder and encrypting and decrypting units thereof as well as record encrypting and decrypting methods |
| CN104410966A (en) * | 2014-11-27 | 2015-03-11 | 成都远为天胜科技有限公司 | Secure wireless communication method |
| CN104469753A (en) * | 2014-11-27 | 2015-03-25 | 成都远为天胜科技有限公司 | Wireless communication connecting method |
| CN104994500B (en) * | 2015-05-22 | 2018-07-06 | 南京科烁志诺信息科技有限公司 | A kind of speech security transmission method and device for mobile phone |
| CN105788602A (en) * | 2016-03-28 | 2016-07-20 | 北京密耳科技有限公司 | Voice encryption method and device for voice band compression system |
| CN105743912B (en) * | 2016-03-31 | 2020-04-07 | 宇龙计算机通信科技(深圳)有限公司 | Voice encryption method and voice sending terminal |
| CN111131141B (en) * | 2019-09-30 | 2022-04-29 | 武汉船舶通信研究所（中国船舶重工集团公司第七二二研究所） | Voice encryption and decryption method and device |
| CN111818519B (en) * | 2020-07-16 | 2022-02-11 | 郑州信大捷安信息技术股份有限公司 | End-to-end voice encryption and decryption method and system |
| CN114221786B (en) * | 2021-11-17 | 2024-03-26 | 西安空间无线电技术研究所 | Novel communication hardware encryption system and method based on pulse compression |
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| CN1592141A (en) * | 2004-01-17 | 2005-03-09 | 中国电子科技集团公司第三十研究所 | Terminal to terminal encryption method of cell phone voice and data |
| CN1592185A (en) * | 2004-01-17 | 2005-03-09 | 中国电子科技集团公司第三十研究所 | Terminal to terminal encryption method of cell phone voice and data |
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| CN1592141A (en) * | 2004-01-17 | 2005-03-09 | 中国电子科技集团公司第三十研究所 | Terminal to terminal encryption method of cell phone voice and data |
| CN1592185A (en) * | 2004-01-17 | 2005-03-09 | 中国电子科技集团公司第三十研究所 | Terminal to terminal encryption method of cell phone voice and data |
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