201001399 九、發明說明： 【發明所屬之技術領域】 本發明是有關於一種類比語音傳輸系統， 關於一種利用類比語音之靜音框以進行保密處理之二 語音傳輸系統。 【先前技術】 語音分析與辨認一直是訊號處理與人工智慧的一 學問與應用，透過語音訊號的後續處理，可分^ 的f份與其語意的目❺。早期的訊號處理，通常是利 電容、電感與電阻等被動元件所組成的濾波器來進行訊 號處理’但是這㈣波n卻有著料先天上所難以克 =缺點’像是精確度較差、易受雜訊干擾、體積較大及 系統的適應力較差等。這幾年來由於超大型積體電路的 迅速發展，以及快速傅立葉轉換理論的應用，使得數位 式訊號處理（Digital Signal Process，Dsp)㈣度大幅提 升，隨著社會的發展和現代科學技術的進步，人們的生 活也漸漸進人數位化時代，資訊在我們的生活中扮演著 越來越重要的角色，因此資訊的保密也格外重要，進而 成為現今訊號處理的主流，舉凡行動電話、音效卡及語 音辨識等’到處都可以看到DSP的大量應用。 當我們將類比的言吾音訊號轉換為數位訊號以進行應 時，在數位訊號中會出現許多靜音框。因此，在專利 案號84106449巾，即已提及一種電話機傳送語音能量空 201001399 Γ二加=以運用靜音框來進行類比訊號的加 利用靜音框加:假音例:是】;= 匕Γ=:語以含有靜音“ 作-加密的處理。、此外，習知^:=將能量分布 再傳送；因此，在有限的傳送頻寬下，同 dii:訊號會使用相同的頻率範圍，而造成同步 號之頻率的變動率較低，且不容易與語音訊號分離。 之，之各項問題，為了能夠兼顧解決 -種多年研究開發與諸多實務經驗，提出 種類比&曰傳輸保密系統及其方 缺點之實現方式與依據。 彳作為改善上述 【發明内容】 有鑑於此，本發明之目的就是在提供一種立201001399 IX. Description of the Invention: [Technical Field] The present invention relates to an analog voice transmission system, and a voice transmission system for performing secret processing using a silent frame of analog voice. [Prior Art] Speech analysis and recognition has always been a learning and application of signal processing and artificial intelligence. Through the subsequent processing of voice signals, it is possible to distinguish between the parts of f and the meaning of semantics. Early signal processing, usually a filter composed of passive components such as capacitors, inductors, and resistors, was used for signal processing. 'But this (four) wave n is inherently difficult to achieve = the disadvantages are like poor accuracy and vulnerability. Noise interference, large size and poor adaptability of the system. In recent years, due to the rapid development of ultra-large integrated circuits and the application of fast Fourier transform theory, the digital signal processing (Dsp) has been greatly improved. With the development of society and the advancement of modern science and technology, People's lives are gradually entering the era of digitization. Information plays an increasingly important role in our lives. Therefore, the confidentiality of information is also extremely important, and thus becomes the mainstream of today's signal processing, including mobile phones, sound cards and voices. Identification, etc. 'A large number of applications of DSP can be seen everywhere. When we convert the analog voice signal into a digital signal for response, there are many mute boxes in the digital signal. Therefore, in Patent No. 84106449, it has been mentioned that a telephone transmits voice energy null 201001399 Γ 加 = = using a mute box to perform analog signal addition using a mute box: false example: yes]; = 匕Γ = : The language contains a mute "encryption-encryption process. In addition, the conventional ^:= re-transmits the energy distribution; therefore, at a limited transmission bandwidth, the same dii: signal will use the same frequency range, causing synchronization The frequency of the number has a low rate of change, and it is not easy to separate from the voice signal. In order to solve the problem of various kinds of research and development and many practical experiences, the type ratio & transmission security system and its side are proposed. The implementation and basis of the shortcomings. 彳 As an improvement of the above [invention] In view of the above, the object of the present invention is to provide a stand
其方法，以解決習知之加密技術僅G 假“訊號來去除斷音所衍生之諸多缺陷。 統，的，提出一種類比語音傳輸保密系 :框比數位轉換器、數位音框產生器、靜 數位=換:步:::=，、加密器、第- :=:㈡接:密器及第二數位類 頰比數位轉換器接收一類比訊號以產生 一數位訊號，數位音框產生it根據數位訊號產生多個數 201001399 位曰，丄靜音框辨別器再將多個數位音框區分為靜音框 及非靜音框。同步與編碼訊號框產生器則提供一同步與 '、扁^號框來取代靜音框；值得注意的是，同步盘編碼 f號框包含—位置編碼訊號、一振幅編碼訊號及二同步 二:虎=密||將上❹個非靜音框根據位置編碼訊號來 排？】加雄，並根據振幅編碼訊號來進行振幅調 =加密’進而產生多個加密音框。第一數位 將=個加密音框與上述之同步與編碼訊號框：換為 類比傳輸訊號’然後透過類比訊號傳輸通道來進行傳 ::在接收端方面’同步與編碼訊號框鑑別器從類比傳 j K號中刀離出同步與編碼訊號框，進而取得同步訊 號、位，編碼訊號與振幅編仙號。職，第二類比數 ^換盗根據同步訊號來從類比傳輸訊號中採樣出上述 密音框°接下來’解密㈣據位置編碼訊號及振 3碼《將這些加密音框還原為上述多個數位音框。 + t第二數位類比轉換器再將這些數位音框還原為類 比机"5虎。 =外’本發明更提出—種類比語音傳輸保密方法， 2二3下列步驟··首先，在發送端將-類比訊號轉換為 :數：訊號。然後’根據數位訊號產生多個數位音框。 搖：：：將夕：數位音框區分為至少-靜音框及多個非 番二V ΐ將纪些非靜音框根據一位置編碼訊號進行位 广，列加密’並根據一振幅編碼訊號進行振幅調整加 U產生夕個加密音框。然後，以包含位置編碼訊號 振幅編碼訊號之-編碼訊號框來承載一同步訊號，進而 7 201001399 與編r訊號框，並利用此同步與編碼訊號框 來取代靜音框。接下來，㈣步與編職驗與上 個加密音框轉換為-類比傳輸訊號以進行傳輸。 =收端自類比傳輸訊號中分離出同步與編碼訊號框， 藉，取㈣步訊號、位置編碼訊號及振幅編媽訊號。 下來，利用同步訊號將類比傳輸訊號還原為上述多個加密 «框’並利用位置編碼訊號及振幅編碼 :原，音框。最後’將數位音框再進一步還原為= 就號。 ^所述’因財發明之類比語音傳輸絲系統及 具方法’具有以下優點： 挺ΗΤ («!)本發明可利用各種頻率與振幅之位置編碼訊號及 編碼訊㈣加密數位音框，而非僅如習知之假語音 矾號插補，因此大幅提升其保密能力。 (2)本發明之同步訊號具有與數位音框獨立的可變動 因而容易自類比加密傳輸訊號中分離出來。 錄為使貝審查委員對本發明之技術特徵及所達到 功效有更進一步之瞭解與認識，謹佐以較佳之實施例 及配合詳細之說明如後。 【實施方式】 ，下將參照相關圖式，說明依本發明較佳實施例之 比~ 3傳輸保密系統及其方法，為使便於理解，下述 實施例中之_元件係以相狀符號標示來說明。 201001399 系統：釺】第」J ’其係為本發明之類比語音傳輸保密 第類“不忍圖。®中’類比語音傳輸保密系統包含 比，換器1〇、數位音框產生器η、靜音二 :二加费器3〇、同步與編碼訊號框產生器3!、第一 比訊號傳輸通道5〇、第二丄 及第-數位继卜録編碼訊號框鑑職7〇、解密器80 數位訊號產生多個數位音框器據 數位音框區分為靜音框21及二 =器 號框產生器31則提供_同步曰^、編碼訊 立y Λ, / /、編碼況遽框3 3來取代靜 C注意的是，同步與編瑪訊號框33 = 、、扁馬汛諕、一振幅編碼訊號及一同步訊號； 步與編碼訊號框產生器31提 " == 上力，靜音框 整加密並根據振幅編碼訊號來進行振幅調 比2僂t ?上夕個加密音框3 4。藉此，本發明之類 θ專輸保岔系統不僅打亂了原數位 位音框之振幅’亦即語音能量= 接士無法根據語音能量予以還原。 接下來，第一數位類比轉換器4〇 ’、 與上述之同步與編碼訊號框33轉換為二；:力:：:框34 然後透過類比訊號傳輸通道5G來進; 方 门步與編碼訊说框鐘別器70從類比傳輸訊號中分離 201001399 出同步與編碼訊號框33，進而取得同步訊號71與位置編 碼訊號及振幅編碼訊號72。然後，第二類比數位轉換器 60根據同步訊號71來從類比傳輸訊號中採樣出上述多個 加狯音框34。接下來，解密器80根據位置編碼訊號及振 =編碼訊號72將這些加密音框34還原為上述多個數位 音框。最後，第二數位類比轉換器9〇再將這些數位音框 還原為類比訊號。 承上所述，因為語音訊號的組成包含了說話者的聲 f及語音能量的分布，因此要對語音訊號作到完全的保 氆傳輸，則須旎完全地破壞語音的聲紋與語音的能量分 布口此在本發明中，發送端利用數位訊號處理的方 法，將原有的類比語音訊號做破壞語音的聲紋與語音的 $量分布之保密處理後，再以類比訊號的方式進行傳 =接收端則再以反向的步驟，將加密的類比聲音訊號 以達到類比語音保密傳輸的目#。易言之，本 立訊號處理的方法’將類比語音訊號在時間軸 上的戒號置換，並對語音的能量分布作 ==壞與還原、語音能量的破壞與還原以= 步號的傳遞，進而達到類比語音保密傳輸的目的。 位立：1广下：述本發明各構件之功能如τ :數 位曰C產生》η之功能在於將—定數 ^-^ft«^^(DigitalvoiceFrame；；；« 架的大小可依類比數位轉換器10的取樣率 在=:=====能 201001399 若是’則利用攜帶位置編碼訊號與振幅編石馬 一同步訊號的同步與編碼訊號框33來取代靜立 之，則將非靜音框22送入加密器30以根據位置碼 號及振幅編碼訊號32進行加密的工作。同步鱼編碼^號 :匡產生器Μ之功能在於提供同步與編碼訊號框、33、:並f 值了、曰所使用，位置編碼訊號及振幅編碼訊號32。 值付/主思的疋’加密器3 〇之工作重點. 22作資=4位置的重排與振幅大小的調整之加密工作^ ^到語音聲紋及語音能量分佈的破壞性加密。然後加密 ^ 34與同步與編碼訊號框％ —起於第 =虎框鐘別器70於接收端接收到類比傳輸訊號後，取出 輸第一二類比數位轉換器60’使其能將類比傳 二二轉，為加雄、音框34。同步與編碼訊號框鑑別器％ 進步提供位置編碼訊號及振幅編碼訊號72給解密器 =藉此，解密器80可將加密音框34還原為數位音框。 訊^第一數位類比轉換器9〇再將數位音框還原為類比 ，閱第2圖，其係為本發明一實施例之類比語音 傳輸保密系統之發送端之結構示意圖。圖中，更包含— ^密操作介面35以控制同步與編碼訊號框產生器31，進 調f位置編碼訊號及振幅編碼訊號32與时訊號。具 碼^庙加密操作介面35可包含一加密開關37與—編 M 36。加密開關37可驅動同步與編碼訊號框產生 益31來強制插入同步與編碼訊號框33以取代靜音框 11 201001399 同牛旬味·—，作為位置編碼訊號、振幅編碼訊號及 使父、二=:t =it面广可調整加密器30所 還原。式从達到語音聲紋及能量之完全破壞與 方法3圖’其係為本發明之類比語音傳輸保密 步驟如机鈿圖。本發明之類比語音傳輸保密方法之 步驟S1 :將一類比訊號轉換為一數位訊號。 在於根f數位訊號產生多個數位音框。其重點 音框架。疋數置的數位語音資料後，組成一個數位語 個非靜音框。將夕個數位音框區分為至少一靜音框及多 之編碼含位置編碼訊號及振幅編碼訊號 號框，並取代靜勺「同步訊號以形成i步與編碼訊 排、振幅編碼““：中’位置編碼訊號可為位置重 量的編碼格式。，為振幅改變等破壞語音之聲紋及能 加密p 碼訊號來 框合‘Π. 個加密音框與上述之同步與編碼訊號 含一同步訊鲈^ <輪訊號。藉此，類比傳輸訊號不僅包 °儿，且其語音聲紋及能量分布皆已被編碼訊 12 201001399 號重組過，益〇+ r4-» ^ — 還原。 、/ 第二端竊取後根據能量分布來推測並 框，二Γ取九類:傳輸訊號中分離出同步與編碼訊號 分。且興f同γ sfl號、位置編碼訊號及振幅編媽訊 雜別_ * Γ β，即利用上述實施例之同步與編碼訊號框 ^來解調㈣步訊號與位置編碼訊號及振幅編碼訊 立is .利用同步訊號將類比傳輸訊號還原為加密 i原:為數位:ΐ置編碼訊號及振幅編碼訊號將加密音框 步驟S9 .將數位音框再進—步還原為類比訊號。 的弦號ί:明於一實施例中可利用不同頻率與振幅 m號/ ^而址為位置編碼訊號、振幅編碼訊號與同步 音訊號的能量分布。且本實施例亦可 r量二：框的能量大小’以解決連續音無法處理 匕刀布加进的問題。此外’習知技術 語音訊號直接A如*推、」 ， 了 N 7 W就興 述，可於需要加m送’二本發明如上述實施例所 並利用靜音框作=送時’啟動加密開關再進行傳送， 離本僅Λ舉例性’而非為限制性者。任何未脫 更，範嘴，而對其進行之等效修改或變 更句應13於後附之申請專利範圍中。 13 201001399 【圖式簡單說明】 第1圖係為本發明之類比語音傳輸保密系統之結構示意圖； 第2圖係為本發明一實施例之類比語音傳輸保密系統之發送端之 結構不意圖，以及 第3圖係為本發明之類比語音傳輸保密方法之步驟流程圖。 【主要元件符號說明】 10、60 :類比數位轉換器； 35 :加密操作介面； 11 :數位音框產生器； 3 6 .編碼函式庫， 20 :靜音框辨別器； 37 :加密開關； 21 :靜音框； 40、90 :數位類比轉換 22 :非靜音框； 3S · 為， 30 :加密器； 50 :類比訊號傳輸通 31 :同步與編碼訊號框產生 道； 益， 70 :同步與編碼訊號框 32、72 :位置編碼訊號及振 鑑別器； 幅編碼訊號， 71 :同步訊號； 33 :同步與編碼訊號框； 80 :解密器；以及 34 :加密音框； S1〜S9 :步驟。 14The method is to solve the defects of the conventional encryption technology only G false "signal to remove the broken sound. In addition, an analogy voice transmission security system is proposed: frame ratio digital converter, digital sound box generator, static Digit=Change: Step:::=, Encryptor, No.: :=: (2): The cipher and the second digit type cheek ratio digital converter receive a type of analog signal to generate a digital signal, and the digital sound box generates it according to The digital signal generates multiple numbers 201001399, and the mute frame discriminator divides the multi-digit sound box into a mute box and a non-mute box. The sync and coded signal box generator provides a synchronization and a flat box. Replacing the mute box; it is worth noting that the sync disk code f frame contains a position coded signal, an amplitude coded signal, and two sync two: Tiger=Mid|| will the upper non-silent frame be arranged according to the position coded signal?] Kaxiong, and according to the amplitude coded signal for amplitude modulation = encryption 'and then generate a plurality of encrypted sound boxes. The first digit will = an encrypted sound box and the above-mentioned synchronization and encoding signal box: for analog transmission signal 'and then through the analogy News The transmission channel is used for transmission: in the receiving end, the 'synchronization and coding signal frame discriminator separates the synchronization and coded signal frame from the analog transmission j K, and obtains the synchronization signal, bit, coded signal and amplitude code. Job, the second type of ratio ^ thieves according to the synchronization signal to sample the above-mentioned secret box from the analog transmission signal. Next 'decrypt (four) according to the position coded signal and the vibration code 3 "restore these encrypted sound boxes into the above multiple digits + t second digit analog converter to restore these digital sound box to analog machine "5 tiger. = outside 'the present invention is more proposed - type than voice transmission security method, 2 2 3 following steps · First, At the transmitting end, the analog signal is converted into: number: signal. Then 'multiple digital sound box is generated according to the digital signal. Shake::: eve: the digital sound box is divided into at least - mute box and multiple non-fan two V ΐ The non-silent frame is bit-wided according to a position-coded signal, and the column is encrypted', and amplitude-adjusted according to an amplitude-coded signal is added to generate an encrypted block. Then, the amplitude-coded signal is included to include the position-coded signal. The number-coded signal box carries a synchronization signal, and then 7 201001399 and the edited signal frame, and uses this synchronization and coded signal box to replace the mute frame. Next, (4) step and edit and the last encrypted frame conversion For analogy, the signal is transmitted for transmission. = The receiver separates the sync and coded signal frame from the analog transmission signal, and borrows the (four) step signal, the position coded signal, and the amplitude coded mother signal. Down, the analog signal is used to transmit the analog signal. Revert to the above multiple encryption «boxes" and use position coded signal and amplitude coding: original, sound box. Finally 'restore the digital sound box further to = number. ^The above-mentioned analog transmission voice transmission wire system The method has the following advantages: ΗΤ («!) The present invention can utilize various frequency and amplitude position-coded signals and coded signals (4) to encrypt the digital sound box, rather than just the conventional false voice nickname interpolation, so Improve their confidentiality. (2) The synchronization signal of the present invention has a variable independence from the digital sound frame and is thus easily separated from the analog encrypted transmission signal. It is noted that the Applicant's review of the technical features and the efficacies of the present invention will be further understood and appreciated by the preferred embodiments and the detailed description. [Embodiment] A transmission security system and a method thereof according to a preferred embodiment of the present invention will be described with reference to the related drawings. For ease of understanding, the components in the following embodiments are indicated by phase symbols. To illustrate. 201001399 System: 釺] The first "J" is the analogy of the invention. The category of "voiceless transmission. The analogy in the audio transmission security system includes, the converter 1 〇, the digital sound box generator η, the mute two : 2 plus processor 3 同步, synchronous and coded signal frame generator 3!, first ratio signal transmission channel 5 〇, second 丄 and digital-digit recording code frame identification 7 〇, decryptor 80 digital signal Generating a plurality of digital sound box devices according to the digital sound box is divided into a mute box 21 and a second = device number box generator 31 provides _sync 曰 ^, coded signal y Λ, / /, code status frame 3 3 instead of static Note that the sync and marshal signal frame 33 = , , the flat horse, an amplitude coded signal, and a sync signal; the step and coded signal frame generator 31 raises " == the force, the mute frame is encrypted and According to the amplitude coded signal, the amplitude adjustment ratio 2偻t? is performed on the encrypted speech frame 34. Thereby, the θ dedicated transmission protection system of the present invention not only disturbs the amplitude of the original positional sound frame, that is, the voice. Energy = The adapter cannot be restored based on the speech energy. Next, the first digit The ratio converter 4〇', and the synchronization and coded signal frame 33 are converted to two; the force::: block 34 is then transmitted through the analog signal transmission channel 5G; the square gate step and the coded frame blockter 70 are The analog transmission signal separates the 201001399 synchronization and coded signal frame 33, and further obtains the synchronization signal 71 and the position coded signal and the amplitude coded signal 72. Then, the second analog-to-digital converter 60 samples the analog transmission signal according to the synchronization signal 71. The plurality of chirp frames 34. Next, the decryptor 80 restores the encrypted audio frames 34 to the plurality of digit boxes according to the position-coded signals and the vibration-coded signals 72. Finally, the second digit-to-digital converter 9〇 Then, these digital sound frames are restored to analog signals. As mentioned above, since the composition of the voice signal includes the speaker's sound f and the distribution of voice energy, it is necessary to make a complete transmission of the voice signal. In the present invention, the transmitting end uses the digital signal processing method to destroy the original analog voice signal. After the confidential processing of the volume distribution of voiceprint and voice, the analog signal is transmitted again. The receiving end then reverses the steps to convert the analog analog signal to the analog voice transmission. The method of the lexical signal processing replaces the ring number of the analog voice signal on the time axis, and performs the energy distribution of the voice ==bad and restored, the destruction and restoration of the speech energy, and the transmission of the step number, thereby achieving an analogy. The purpose of voice confidential transmission. Position: 1 broad: The functions of the various components of the present invention such as τ: digital 曰 C generation η function is to - fixed ^ - ^ ft « ^ ^ (DigitalvoiceFrame;;; « frame The size can be based on the sampling rate of the analog-to-digital converter 10 at =:===== can be 201001399. If it is, then the synchronization and coding signal frame 33 carrying the position-coded signal and the amplitude-encoded horse-synchronous signal is used instead of the stand-up. Then, the non-silent frame 22 is sent to the encryptor 30 to perform encryption based on the position code number and the amplitude-encoded signal 32. Synchronous fish code ^ number: The function of the 匡 generator 在于 is to provide the sync and coded signal frame, 33, and f value, 曰 used, position coded signal and amplitude coded signal 32. Value pay / main thinking 疋 'Encryptor 3 〇 work focus. 22 capital = 4 position rearrangement and amplitude size adjustment encryption work ^ ^ to the voice voiceprint and speech energy distribution destructive encryption. Then, the encryption and encoding and encoding signal frame % are generated. After the analogy transmission signal is received at the receiving end, the first and second analog-to-digital converters 60' are taken out to enable the analogy to be transmitted. The second turn is Jiaxiong and the sound box 34. Synchronization and Coded Message Block Discriminator % Progress provides position coded signal and amplitude coded signal 72 to the decryptor. Accordingly, the decrypter 80 can restore the encrypted tone frame 34 to a digital sound frame. The first digital analog converter 9 还原 reverts the digital sound box to an analogy. Referring to FIG. 2, it is a schematic structural diagram of the transmitting end of the analog voice transmission security system according to an embodiment of the present invention. The figure further includes a ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- The coded temple encryption operation interface 35 can include an encryption switch 37 and a code M 36. The encryption switch 37 can drive the synchronization and coded signal frame to generate the benefit 31 to force the insertion of the synchronization and coded signal frame 33 to replace the mute frame 11 201001399 with the sequel, as the position coded signal, the amplitude coded signal and the parent, the second =: The t =it plane can be adjusted by the cipher 30 to be restored. From the complete destruction of voice voiceprint and energy and the method of Figure 3, it is an analogous to the voice transmission security step of the invention. Step S1 of the analog voice transmission security method of the present invention: converting a analog signal into a digital signal. A plurality of digital sound boxes are generated in the root f digital signal. Its focus is on the sound frame. After the digital voice data is set, a digital non-mute frame is formed. Divide the digital audio frame into at least one mute frame and a plurality of coded position coded signals and amplitude coded signal number boxes, and replace the static signal "synchronization signal to form i step and coded channel, amplitude code "": The position coded signal can be the encoding format of the position weight. For the amplitude change, etc., the voiceprint of the voice is broken and the p code signal can be encrypted to frame the 'Π. The encrypted voice frame and the synchronization signal and the coded signal have a synchronization signal. <Round signal. By this, the analog transmission signal is not only included, but its voice voiceprint and energy distribution have been reorganized by the code 12 201001399, benefit + r4-» ^ - restore. / / second end After stealing, it is presumed to be framed according to the energy distribution, and two types are taken: the synchronization signal and the coded signal are separated in the transmission signal. The Hsf is the same as the γ sfl number, the position coded signal, and the amplitude code is mixed with _ * Γ β, That is, using the synchronization and coded signal frame of the above embodiment to demodulate the (four) step signal and the position coded signal and the amplitude coded signal. The synchronous signal is used to restore the analog transmission signal to the encrypted i original: digit: the coded signal and The amplitude coded signal will encrypt the sound box step S9. The digital sound box is further stepped back to the analog signal. The string number ί: in an embodiment, different frequency and amplitude m number / ^ can be used as the position coded signal The energy distribution of the amplitude-encoded signal and the synchronized audio signal. In this embodiment, the energy amount of the frame can also be used to solve the problem that the continuous sound cannot handle the addition of the guillotine cloth. In addition, the conventional technology voice signal directly A For example, if you push N 7 W, you can add the m to send the 'two inventions, as in the above embodiment, and use the mute box for = send time' to start the encryption switch and then transmit. Sexuality is not a restriction. Any change or change to the equivalent of the sentence shall be made in the scope of the patent application attached. 13 201001399 [Simplified description of the drawings] FIG. 1 is a schematic structural diagram of an analog voice transmission security system according to the present invention; FIG. 2 is a schematic diagram of the structure of a transmitting end of an analog voice transmission security system according to an embodiment of the present invention, and Figure 3 is a flow chart showing the steps of the analog voice transmission security method of the present invention. [Main component symbol description] 10, 60: analog digital converter; 35: encryption operation interface; 11: digital sound box generator; 3 6. encoding library, 20: mute frame discriminator; 37: encryption switch; : mute box; 40, 90: digital analog conversion 22: non-silent box; 3S · for, 30: encryptor; 50: analog signal transmission 31: synchronization and coded signal box generation; benefit, 70: synchronization and coding signal Blocks 32, 72: position coded signal and vibration discriminator; amplitude coded signal, 71: sync signal; 33: sync and coded signal frame; 80: decryptor; and 34: encrypted frame; S1~S9: steps. 14