CN101605185A - Speech signal processing method, device and system - Google Patents

Abstract

The present invention relates to a voice signal processing method, device and system. The method includes: receiving an original dual-tone multi-frequency signal and a first voice signal, wherein the first voice signal is an encrypted voice signal; The multi-frequency signal is encoded to form the first dual-tone multi-frequency signal; padding bytes are added between the first dual-tone multi-frequency signal and the first voice signal, and the first dual-tone multi-frequency signal, the first voice signal The signal and stuffing bytes form a service data frame; and the service data frame is sent. The voice signal processing method, device and system provided by the present invention, after encoding the original DTMF signal to form the first DTMF signal, add padding bytes between the first DTMF signal and the first voice signal to form a service data frame, thereby The DTMF signal and the encrypted voice signal can be jointly transmitted in the communication network in the encrypted communication state.

Description

Speech signal processing method, device and system

technical field

Embodiments of the present invention relate to the technical field of communications, in particular to a voice signal processing method, device and system.

Background technique

With the development and wide application of mobile communication technology, the confidentiality of mobile communication has become an increasingly prominent problem, so encrypted voice communication technology has emerged as the times require. Encrypted voice communication supports end-to-end fully encrypted communication and terminal-to-Public Switched Telephone Network (PSTN) half-encrypted communication.

In the voice encryption communication process, the voice data is encrypted by the terminal and sent to the Base Station Controller (BSC for short), and the BSC passes the encrypted voice data through the Intersystem Link Protocol (ISLP for short) Transformation, the transmission rate of the voice data is adapted to a code stream of 64 kilobits per second (Kbps) and then transmitted in a time division multiplex (Time Division Multiplex, referred to as: TDM) network. If the recipient of the voice data is a mobile terminal, the encrypted voice data is converted to the reverse ISLP by the BSC on the other side to obtain the encrypted voice data, and the encrypted voice data is decrypted on the mobile terminal to restore the voice signal ; If the receiver of the voice data is a fixed terminal of the PSTN, the encrypted voice data needs to be sent to the encryption gateway (Encrypt Gateway, referred to as: EGW), and the EGW performs anti-ISLP transformation and decryption on the encrypted voice data to restore the voice The signal is then sent to the fixed terminal; conversely, the voice in the opposite direction sent from the fixed terminal to the mobile terminal also needs to be encrypted by the encryption gateway before being sent to the mobile terminal.

In the process of voice communication, the mobile terminal can perform clear communication first, and switch to encrypted communication by triggering the button on the mobile terminal during the call, or directly set it to encrypted communication on the mobile terminal. After entering the voice communication The mobile terminal automatically switches to encrypted communication.

The inventor finds in the process of implementing the present invention that the existing voice encryption communication method has at least the following defects: before the mobile terminal performs voice communication, the Dual Tone Multi-Frequency (Dual Tone Multi-Frequency, referred to as: DTMF) signal is directly passed through a dedicated The voice communication channel of the mobile terminal is sent to the BSC. During non-encrypted communication, the BSC can mix the DTMF signal with the voice signal and then send it to the opposite end; Data, so the DTMF signal cannot be mixed into the encrypted voice data, resulting in the inability to transmit the DTMF signal in the encrypted communication state.

Contents of the invention

The purpose of the present invention is to provide a voice signal processing method, device and system, so that DTMF signals and encrypted voice signals can be jointly transmitted in the communication network in the state of secret communication.

The embodiment of the present invention provides a voice signal processing method, including:

Receiving an original DTMF signal and a first voice signal, where the first voice signal is an encrypted voice signal;

Encoding the original DTMF signal to form a first DTMF signal;

Adding stuffing bytes between the first DTMF signal and the first voice signal, the first DTMF signal, the first voice signal and the stuffing bytes form a service data frame;

Send the service data frame.

Above-mentioned voice signal processing method, by encoding original DTMF signal, after forming the first DTMF signal, adding padding byte to form service data frame between the first DTMF signal and the first voice signal, thereby make DTMF signal and encrypted voice signal In the encrypted communication state, it can be transmitted jointly in the communication network.

The embodiment of the present invention also provides a voice signal processing method, including:

Receive business data frames;

Obtaining a first dual-tone multi-frequency signal and a first voice signal from the service data frame, where the first voice signal is an encrypted voice signal;

Deciphering the first voice signal to form an original voice signal, and decoding the first DTMF signal to form an original DTMF signal;

sending the original voice signal and the original DTMF signal.

The above voice signal processing method, by decrypting the acquired first voice signal, forms the original voice signal, and decodes the first DTMF signal to form the original DTMF signal, so that the original DTMF signal can be identified, and the DTMF signal is realized. The encrypted voice signal and the encrypted voice signal can be jointly transmitted in the communication network in the encrypted communication state.

The embodiment of the present invention also provides a voice signal processing device, including:

A receiving module, configured to receive an original DTMF signal and a first voice signal, the first voice signal being an encrypted voice signal;

An encoding module, configured to encode the original DTMF signal to form a first DTMF signal;

A stuffing module, configured to add stuffing bytes between the first DTMF signal and the first voice signal, where the first DTMF signal, the first voice signal, and the stuffing bytes form a service data frame;

A sending module, configured to send the service data frame.

In the above voice signal processing device, the encoding module encodes the original DTMF signal to form the first DTMF signal, and the filling module adds filling bytes between the first DTMF signal and the first voice signal to form a service data frame, realizing the DTMF signal The encrypted voice signal and the encrypted voice signal can be jointly transmitted in the communication network in the encrypted communication state.

The embodiment of the present invention also provides a voice signal processing device, including:

A receiving module, configured to receive service data frames;

An acquisition module, configured to acquire a first dual-tone multi-frequency signal and a first voice signal from the service data frame, where the first voice signal is an encrypted voice signal;

Decryption and decoding module, used to decrypt the first voice signal to form an original voice signal, and decode the first DTMF signal to form an original DTMF signal;

A sending module, configured to send the original voice signal and the original DTMF signal.

Above-mentioned voice signal processing device, deciphering and decoding module forms original voice signal by deciphering the first voice signal obtained, and decodes first DTMF signal, forms original DTMF signal, thereby can identify original DTMF signal, realizes The DTMF signal and the encrypted voice signal can be jointly transmitted in the communication network in the encrypted communication state.

An embodiment of the present invention also provides a speech signal processing system, including: a first speech signal processing device and a second speech signal processing device, wherein,

The first voice signal processing device is used to receive an original DTMF signal and a first voice signal, and the first voice signal is an encrypted voice signal; encode the original DTMF signal, Form the first dual-tone multi-frequency signal; Add stuffing bytes between the first dual-tone multi-frequency signal and the first voice signal, and the first dual-tone multi-frequency signal, the first voice signal and the stuffing bytes form a service data frame; sending the service data frame to the second audio signal processing device;

The second voice signal processing device receives the service data frame sent from the first voice signal processing device; obtains a first dual-tone multi-frequency signal and a first voice signal from the service data frame, and the first The voice signal is a voice signal after encryption processing; the first voice signal is decrypted to form an original voice signal, and the first DTMF signal is decoded to form an original DTMF signal; The original voice signal and the original DTMF signal.

In the above speech signal processing system, the first speech signal processing device encodes the original DTMF signal to form the first DTMF signal, and then adds padding bytes between the first DTMF signal and the first speech signal to form a service data frame, and the second The voice signal processing device decrypts the acquired first voice signal to form the original voice signal, and decodes the first DTMF signal to form the original DTMF signal, so that the original DTMF signal can be identified, and the DTMF signal and encryption are realized. Voice signals can be jointly transmitted in the communication network in the encrypted communication state.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings without any creative effort.

Fig. 1 is the schematic flow sheet of an embodiment of speech signal processing method of the present invention;

Fig. 2 is a schematic flow chart of another embodiment of the speech signal processing method of the present invention;

Fig. 3 is a schematic diagram of a coding format in the embodiment shown in Fig. 2;

Fig. 4 is a schematic flow chart of another embodiment of the speech processing method of the present invention;

Fig. 5 is a schematic flow chart of another embodiment of the speech processing method of the present invention;

Fig. 6 is a signaling flowchart of the method embodiment shown in Fig. 1 to Fig. 5;

Fig. 7 is an application schematic diagram of the method embodiment shown in Fig. 1 to Fig. 5;

Fig. 8 is a schematic structural diagram of an embodiment of the speech signal processing device of the present invention;

FIG. 9 is a schematic structural diagram of another embodiment of the speech signal processing device of the present invention;

FIG. 10 is a schematic structural diagram of another embodiment of the speech signal processing device of the present invention;

FIG. 11 is a schematic structural diagram of another embodiment of the speech signal processing device of the present invention;

Fig. 12 is a schematic structural diagram of an embodiment of the speech signal processing system of the present invention;

Fig. 13 is a schematic structural diagram of another embodiment of the speech signal processing system of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Fig. 1 is the schematic flow chart of an embodiment of voice signal processing method of the present invention, as shown in Fig. 1, present embodiment comprises the following steps:

Step 101, the BSC receives the original DTMF signal and the first voice signal sent by the terminal equipment, wherein the first voice signal is an encrypted voice signal;

Step 102, the BSC encodes the original DTMF signal to form a first DTMF signal;

Step 103, the BSC adds stuffing bytes between the first DTMF signal and the first voice signal, wherein the first DTMF signal, the first voice signal and the stuffing bytes form a service data frame;

Step 104, the BSC sends the service data frame to the EGW.

In the voice signal processing method provided by the embodiment of the present invention, after encoding the original DTMF signal to form the first DTMF signal, adding padding bytes between the first DTMF signal and the first voice signal to form a service data frame, realizing DTMF The signal and the encrypted voice signal can be jointly transmitted in the communication network in the encrypted communication state.

Fig. 2 is the schematic flow chart of another embodiment of the speech signal processing method of the present invention, Fig. 3 is the coding format schematic diagram in the embodiment shown in Fig. 2, as shown in Fig. 2, this embodiment comprises the following steps:

Step 201, the BSC receives the original DTMF signal and the first voice signal sent by the terminal equipment, wherein the first voice signal is an encrypted voice signal;

Step 202, BSC encodes the original DTMF signal according to the message length of the first voice signal, forms the first DTMF signal, and makes the message length of the first DTMF signal formed and the message length of the first voice signal unequal;

Step 203, the BSC adds stuffing bytes between the first DTMF signal and the first voice signal, wherein the first DTMF signal, the first voice signal and the stuffing bytes form a service data frame;

Step 204, the BSC sends the service data frame to the EGW.

In the above step 201, the BSC receives the original DTMF signal sent by the terminal equipment through the signaling dedicated channel, wherein the original DTMF signal is the user dialing information sent by the terminal equipment during the second dial-up call; the BSC receives the first DTMF signal sent by the terminal equipment through the voice channel. A voice signal, wherein the first voice signal is a voice signal encrypted by the terminal device.

In the above-mentioned step 202, in order to enable the BSC to recognize the first DTMF signal and the first voice signal, it is necessary to make the message length of the first DTMF signal and the message length of the first voice signal unequal. The first DTMF signal can be identified by the length of the message. Specifically, in a Code Division Multiple Access (CDMA) network, different signal transmission rates correspond to different voice packet lengths, for example: 22 bytes (BYTE), 10BYTE, 5BYTE, 2BYTE, as long as If the message length of the encoded first DTMF signal is not the above voice message length, then the first DTMF signal can be identified by the message length of the first voice signal.

BSC encodes the original DTMF signal according to the message length of the first voice signal, the encoding format is as shown in Figure 3, the 0th byte and the 1st byte are used to set the message header identification (Head), and the Head uses In the flag message, its length can be set according to different communication systems; the second byte is used to indicate the DTMF event code; in the third byte, the first bit (E) is used to indicate whether the DTMF event code is over , 1 means end, 0 means not end, the second bit (R) is a reserved bit, the third to seventh bits are used to indicate the volume (Volume), expressed in decibels (dB), the fourth byte and the fifth A byte is used to represent the DTMF signal duration (Duration). Through the above encoding method, the implementation difficulty of the communication system can be reduced. In this embodiment, the original DTMF signal is encoded by adding a 2-byte (BYTE) message header 0x0096 (it can also be other bytes or other numbers, which can meet the needs of the actual communication system) to form a 6BYTE message.

In the above step 203, the BSC adds stuffing bytes between the first DTMF signal and the first voice signal, wherein the first DTMF signal, the first voice signal and the stuffing bytes form a service data frame. The padding byte can be a identifiable fixed byte preset by the system, so that the data is adapted from 8K to 64K, so as to meet the requirements of adaptation to PCM, such as 8-bit byte 01111110 (0x7E), use "01111110 (0x7E)" encapsulation data. Specifically, in a CDMA network, padding bytes can be added between the first DTMF signal and the first voice signal according to ISLP conversion, that is, 0X7E is filled between the first voice signal and the first DTMF signal, so that the data rate After reaching the transmission rate of 64Kbps, it can be transmitted in the TDM network.

In the voice signal processing method provided by this embodiment, the BSC forms the first DTMF signal by encoding the original DTMF signal, and makes the message length of the first DTMF signal formed not equal to the message length of the first voice signal, by The first DTMF signal can be identified by the message length of the first voice signal, and stuffing bytes are added between the first DTMF signal and the first voice signal to form a service data frame, which realizes the encrypted communication between the DTMF signal and the encrypted voice signal state can be jointly transmitted in the communication network.

Fig. 4 is a schematic flow chart of another embodiment of the speech processing method of the present invention. As shown in Fig. 4, this embodiment includes the following steps:

Step 401, the EGW receives the service data frame sent by the BSC;

Step 402, the EGW obtains the first DTMF signal and the first voice signal from the service data frame, wherein the first voice signal is an encrypted voice signal;

Step 403, the EGW decrypts the first voice signal to form an original voice signal, and decodes the first DTMF signal to form an original DTMF signal;

Step 404, the EGW sends the original voice signal and the original DTMF signal to the PBX.

In the voice signal processing method provided in this embodiment, the EGW decrypts the acquired first voice signal to form an original voice signal, and decodes the first DTMF signal to form an original DTMF signal, so that the original DTMF signal can be identified , realizing that the DTMF signal and the encrypted voice signal can be jointly transmitted in the communication network in the encrypted communication state.

Fig. 5 is a schematic flow chart of another embodiment of the voice processing method of the present invention. As shown in Fig. 5, this embodiment includes the following steps:

Step 501, the EGW receives the service data frame sent by the BSC;

Step 502, the EGW acquires stuffing bytes in the service data frame, where the stuffing bytes are located between the first DTMF signal and the first voice signal;

Step 503, EGW deletes stuffing bytes;

Step 504, the EGW obtains the first DTMF signal and the first voice signal according to the message length of the service data frame;

Step 505, the EGW decrypts the first voice signal to form an original voice signal;

Step 506, the EGW decodes the first DTMF signal according to the message length of the first voice signal to form an original DTMF signal, wherein the message length of the first DTMF signal is not equal to the message length of the first voice signal;

Step 507, the EGW sends the original voice signal and the original DTMF signal to the PBX.

In the above step 502, since the padding bytes are used to make the transmission rate of the first DTMF signal and the first voice signal reach the transmission rate of the communication network, in order to obtain the first DTMF and the first voice signal, it is necessary to obtain the service data first Padding bytes in the frame. Specifically, in a CDMA network, stuffing bytes can be obtained between the first DTMF signal and the first voice signal according to the inverse ISLP transformation, and effective service data frames contained in the code stream containing the stuffing bytes can be extracted. For example: when the padding byte is set to 0X7E, the frame contained between the two "01111110 (0x7E)" is a valid service data frame.

In the above step 503 and step 504, the first DTMF signal and the first voice signal can be obtained by deleting stuffing bytes and according to the message length of the service data frame.

In the above step 505, decryption processing is performed on the first voice signal. The decryption processing may be consistent with the encryption processing of the terminal device in the embodiment shown in FIG. 1 or FIG. 2 , so that after decrypting the first voice signal, Form the original speech signal.

In the above-mentioned step 506, the first DTMF signal is decoded, and the decoded process can be consistent with the encoding process in the embodiment shown in Figure 1 or Figure 2, so that the original DTMF signal can be formed after the first DTMF signal is decoded .

The speech signal processing method provided in this embodiment, by decrypting the first speech signal obtained, forms the original speech signal, and decodes the first DTMF signal, forms the original DTMF signal, thereby can identify the original DTMF signal, It realizes that DTMF signals and encrypted voice signals can be jointly transmitted in the communication network in the encrypted communication state.

Fig. 6 is a signaling flow chart of the method embodiment shown in Fig. 1 to Fig. 5. The information exchange process of the device (PrivateBranch eXchange, PBX for short) includes the following steps:

Step 601, the terminal device sends the original DTMF signal to the BSC through the signaling dedicated channel during the second dialing call, wherein the original DTMF signal is the user dialing information sent by the terminal device during the second dialing call; sends the second DTMF signal to the BSC through the voice channel A voice signal, wherein the first voice signal is a voice signal encrypted by the terminal device.

Step 602, after the BSC receives the original DTMF signal and the first voice signal, obtain the message length of the first voice signal, encode the original DTMF signal according to the message length of the first voice signal, form the first DTMF signal, and make The message length of the first DTMF signal that forms is not equal to the message length of the first voice signal; Add padding byte between the first DTMF signal and the first voice signal, wherein, the first DTMF signal, the first voice signal and stuffing bytes to form a service data frame, and send the service data frame to the EGW.

Step 603: After receiving the service data frame, the EGW obtains the filling bytes in the service data frame, wherein the filling bytes are located between the first DTMF signal and the first voice signal; delete the filling bytes; according to the report of the service data frame The text length obtains the first DTMF signal and the first voice signal; the first voice signal is decrypted to form the original voice signal; the first DTMF signal is decoded according to the message length of the first voice signal to form the original DTMF signal, wherein , the message length of the first DTMF signal is not equal to the message length of the first voice signal; sending the original voice signal and the original DTMF signal to the PBX.

Step 604: After receiving the original voice signal and the original DTMF signal, the PBX obtains the user dialing information sent by the terminal device during the second dialing call from the original DTMF signal.

It can be seen from the above process that after the BSC encodes the original DTMF signal to form the first DTMF signal, it adds padding bytes between the first DTMF signal and the first voice signal to form a service data frame. The voice signal is decrypted to form the original voice signal, and the first DTMF signal is decoded to form the original DTMF signal, so that the PBX can obtain the user dialing number sent by the terminal device during the second dialing call from the original DTMF signal sent by the EGW The information (specifically, the extension number) realizes that the DTMF signal and the encrypted voice signal can be jointly transmitted in the communication network in the encrypted communication state.

Fig. 7 is a schematic diagram of the application of the method embodiment shown in Fig. 1-Fig. , BSC, EGW and PBX process includes the following steps:

Step 701, the terminal device sends the original DTMF signal to the BSC through the signaling dedicated channel during the second dialing call, wherein the original DTMF signal is the user dialing information sent by the terminal device during the second dialing call; sends the second DTMF signal to the BSC through the voice channel A voice signal, wherein the first voice signal is a voice signal encrypted by the terminal device.

Step 702, after the BSC receives the original DTMF signal and the first voice signal, encode the original DTMF signal according to the message length of the first voice signal to form the first DTMF signal, and make the message length of the first DTMF signal formed The message length of the first voice signal is not equal; ISLP conversion is performed on the first DTMF signal and the first voice signal, that is, 0X7E is added between the first DTMF signal and the first voice signal as a padding byte, and the first DTMF signal 1. The first voice signal and stuffing bytes form a service data frame, and after the data transmission rate of the service data frame reaches 64Kbps, it is sent to the EGW through the TDM network.

Step 703: After receiving the service data frame sent by the BSC, the EGW obtains the filling byte 0X7E in the service data frame through ISLP inverse conversion, and deletes the filling byte 0X7E; the EGW obtains the first DTMF signal and The first voice signal; the first voice signal is decrypted to form the original voice signal; the first DTMF signal is decoded according to the message length of the first voice signal to form the original DTMF signal, wherein the message of the first DTMF signal The length is not equal to the message length of the first voice signal; the original voice signal and the original DTMF signal are sent to the PBX.

Step 704: After receiving the original voice signal and the original DTMF signal, the PBX obtains the user dialing information sent by the terminal device during the second dialing call from the original DTMF signal.

It can be known from the above process that after the BSC encodes the original DTMF signal to form the first DTMF signal, it adds a padding byte 0X7E between the first DTMF signal and the first voice signal to form a service data frame. A voice signal is decrypted to form the original voice signal, and the first DTMF signal is decoded to form the original DTMF signal, so that the PBX can obtain the user information sent by the terminal device during the second dial-up call from the original DTMF signal sent by the EGW. The dialing information (specifically, the extension number) realizes that the DTMF signal and the encrypted voice signal can be jointly transmitted in the communication network in the encrypted communication state.

FIG. 8 is a schematic structural diagram of an embodiment of the speech signal processing device of the present invention. As shown in FIG. 8 , this embodiment includes: a receiving module 81 , an encoding module 82 , a filling module 83 and a sending module 84 .

Wherein, receiving module 81 receives original DTMF signal and the first speech signal, and the first speech signal is the speech signal after encryption processing; Coding module 82 encodes the original DTMF signal that receiving module 81 receives, forms the first DTMF signal; Module 83 adds padding bytes between the first DTMF signal and the first voice signal generated by encoding module 82 encoding, and the first DTMF signal, the first voice signal and padding bytes form a service data frame; sending module 84 sends the stuffing module to form business data frame.

In the speech signal processing device provided by the embodiment of the present invention, the encoding module 82 encodes the original DTMF signal to form the first DTMF signal, and the stuffing module 83 adds stuffing bytes between the first DTMF signal and the first voice signal to form a service The data frame realizes that the DTMF signal and the encrypted voice signal can be jointly transmitted in the communication network in the encrypted communication state.

FIG. 9 is a schematic structural diagram of another embodiment of the speech signal processing device of the present invention. As shown in FIG. 9 , this embodiment includes: a receiving module 91 , an encoding module 92 , a filling module 93 and a sending module 94 .

Wherein, receiving module 91 receives original DTMF signal and the first speech signal, and the first speech signal is the speech signal after encryption processing; Coding module 92 encodes the original DTMF signal that receiving module 91 receives, forms the first DTMF signal; Module 93 adds padding bytes between the first DTMF signal and the first voice signal generated by encoding module 92 encoding, and the first DTMF signal, the first voice signal and padding bytes form a service data frame; sending module 94 sends the stuffing module to form business data frame.

Further, encoding module 92 can also include: encoding unit 921; Encoding unit 921 encodes the original DTMF signal according to the message length of the first voice signal to form the first DTMF signal, and makes the message length of the first DTMF signal formed The message length is not equal to that of the first voice signal.

In the voice signal processing device provided by the embodiment of the present invention, the coding unit 921 encodes the original DTMF signal according to the message length of the first voice signal, and makes the message length of the first DTMF signal formed be the same as the message length of the first voice signal The lengths are not equal, the first DTMF signal can be identified by the message length of the first voice signal, and the stuffing module 93 adds padding bytes between the first DTMF signal and the first voice signal to form a service data frame, realizing the DTMF signal The encrypted voice signal and the encrypted voice signal can be jointly transmitted in the communication network in the encrypted communication state.

FIG. 10 is a schematic structural diagram of another embodiment of the speech signal processing device of the present invention. As shown in FIG.

Wherein, the receiving module 11 receives the service data frame; the obtaining module 12 obtains the first DTMF signal and the first voice signal from the service data frame received by the receiving module 11, and the first voice signal is a voice signal after encryption processing; the deciphering and decoding module 13 decrypt the first voice signal acquired by the acquisition module 12 to form an original voice signal, and decode the first DTMF signal acquired by the acquisition module 12 to form an original DTMF signal; Voice signal and original DTMF signal.

In the voice signal processing device provided by the embodiment of the present invention, the decryption and decoding module 13 forms an original voice signal by decrypting the acquired first voice signal, and decodes the first DTMF signal to form an original DTMF signal, so that it can be identified The original DTMF signal is output, and the DTMF signal and the encrypted voice signal can be jointly transmitted in the communication network in the encrypted communication state.

FIG. 11 is a structural schematic diagram of another embodiment of the speech signal processing device of the present invention. As shown in FIG.

Wherein, the receiving module 21 receives the service data frame; the obtaining module 22 obtains the first DTMF signal and the first voice signal from the service data frame received by the receiving module 21, and the first voice signal is a voice signal after encryption processing; the deciphering and decoding module 23 decrypt the first voice signal obtained by the acquisition module 22 to form an original voice signal, and decode the first DTMF signal obtained by the acquisition module 22 to form an original DTMF signal; Voice signal and original DTMF signal.

Further, the acquisition module 22 may further include: a detection unit 221 , a deletion unit 222 , and an acquisition unit 223 . Detection unit 221 obtains the filling byte in the business data frame, and filling byte is positioned between the first DTMF signal and the first voice signal; Deletion unit 222 deletes the filling byte that detection unit 221 detects; Acquisition unit 223 according to business data frame The packet length acquisition and deletion unit 222 deletes the first DTMF signal and the first voice signal after the padding bytes.

In the speech signal processing device provided by the embodiment of the present invention, the decryption and decoding module 23 forms the original speech signal by decrypting the first speech signal obtained, and decodes the first DTMF signal to form the original DTMF signal, so that it can identify The original DTMF signal is output, and the DTMF signal and the encrypted voice signal can be jointly transmitted in the communication network in the encrypted communication state.

FIG. 12 is a schematic structural diagram of an embodiment of the speech signal processing system of the present invention. As shown in FIG. 12 , this embodiment includes: a first speech signal processing device 121 and a second speech signal processing device 122 .

Wherein, the first speech signal processing device 121 receives the original DTMF signal and the first speech signal sent by the terminal equipment, and the first speech signal is a speech signal after encryption processing; the original DTMF signal is encoded to form the first DTMF signal; Filling bytes are added between a DTMF signal and the first voice signal, and the first DTMF signal, the first voice signal and the stuffing bytes form a service data frame; the service data frame is sent to the second sound signal processing device 122 .

The second voice signal processing device 122 receives the service data frame sent from the first voice signal processing device 121; obtains the first DTMF signal and the first voice signal from the service data frame, and the first voice signal is a voice signal after encryption processing; Deciphering the first voice signal to form an original voice signal, and decoding the first DTMF signal to form an original DTMF signal; sending the original voice signal and the original DTMF signal.

In this embodiment, the first speech signal processing device 121 may specifically be a BSC, and the second speech signal processing device 122 may specifically be an EGW.

In the speech signal processing system provided by the embodiment of the present invention, the first speech signal processing device 121 encodes the original DTMF signal to form the first DTMF signal, and then adds stuffing bytes between the first DTMF signal and the first speech signal to form Service data frame, the second voice signal processing device 122 forms the original voice signal by decrypting the first voice signal obtained, and decodes the first DTMF signal to form the original DTMF signal, so that the original DTMF signal can be identified , realizing that the DTMF signal and the encrypted voice signal can be jointly transmitted in the communication network in the encrypted communication state.

FIG. 13 is a schematic structural diagram of another embodiment of the voice signal processing system of the present invention. As shown in FIG. 13 , this embodiment includes: a first voice signal processing device 131 , a second voice signal processing device 132 and a switching device 133 .

Wherein, the first speech signal processing device 131 receives the original DTMF signal and the first speech signal sent by the terminal equipment, and the first speech signal is a speech signal after encryption processing; the original DTMF signal is encoded to form the first DTMF signal; Filling bytes are added between a DTMF signal and the first voice signal, and the first DTMF signal, the first voice signal and the stuffing bytes form a service data frame; and the service data frame is sent to the second voice signal processing device 132 .

The second voice signal processing device 132 receives the service data frame sent from the first voice signal processing device 131; obtains the first DTMF signal and the first voice signal from the service data frame, and the first voice signal is a voice signal after encryption processing; Deciphering the first voice signal to form an original voice signal, and decoding the first DTMF signal to form an original DTMF signal; sending the original voice signal and the original DTMF signal to the switching device 133 . The switching device 133 receives the original voice signal and the original DTMF signal sent from the second voice signal processing device 132, and obtains the dialing information from the original DTMF signal, wherein the dialing information can specifically be the call number of the terminal equipment, or can be other Information about the identity of the terminal device.

In this embodiment, the first voice signal processing device 131 may specifically be a BSC, the second voice signal processing device 132 may specifically be an EGW, and the switching device 133 may specifically be a PBX.

In the speech signal processing system provided by the embodiment of the present invention, the first speech signal processing device 131 encodes the original DTMF signal to form the first DTMF signal, and then adds padding bytes between the first DTMF signal and the first speech signal to form business data frame, the second voice signal processing device 132 forms the original voice signal by decrypting the acquired first voice signal, and decodes the first DTMF signal to form the original DTMF signal, so that the switching device 133 can The extension number is obtained from the original DTMF signal sent by the second voice signal processing device 132, so that the DTMF signal and the encrypted voice signal can be jointly transmitted in the communication network in the encrypted communication state.

The above embodiments of the present invention can be applied to any communication system that needs to transmit encrypted voice and unencrypted call numbers.

Those of ordinary skill in the art can understand that all or part of the steps for realizing the above-mentioned method embodiments can be completed by hardware related to program instructions, and the aforementioned program can be stored in a computer-readable storage medium. When the program is executed, the It includes the steps of the above method embodiments; and the aforementioned storage medium includes: ROM, RAM, magnetic disk or optical disk and other various media that can store program codes.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (12)

1. A voice signal processing method, characterized in that, comprising: Receiving an original DTMF signal and a first voice signal, where the first voice signal is an encrypted voice signal; Encoding the original DTMF signal to form a first DTMF signal; Adding stuffing bytes between the first DTMF signal and the first voice signal, the first DTMF signal, the first voice signal and the stuffing bytes form a service data frame; Send the service data frame. 2. The method according to claim 1, wherein said encoding said original DTMF signal to form a first DTMF signal comprises: Encode the original DTMF signal according to the message length of the first voice signal to form a first DTMF signal, and make the message length of the formed first DTMF signal equal to the The message lengths of the first voice signals are not equal. 3. The method according to claim 1 or 2, characterized in that, adding a padding byte between the first DTMF signal and the first voice signal comprises: Adding padding bytes between the first DTMF signal and the first voice signal according to ISLP conversion. 4. A voice signal processing method, characterized in that, comprising: Receive business data frames; Obtaining a first dual-tone multi-frequency signal and a first voice signal from the service data frame, where the first voice signal is an encrypted voice signal; Deciphering the first voice signal to form an original voice signal, and decoding the first DTMF signal to form an original DTMF signal; sending the original voice signal and the original DTMF signal. 5. The method according to claim 4, wherein said acquiring the first DTMF signal and the first voice signal from the service data frame comprises: Obtain stuffing bytes in the service data frame, where the stuffing bytes are located between the first DTMF signal and the first voice signal; removing said padding bytes; Acquiring the first dual-tone multi-frequency signal and the first voice signal according to the packet length of the service data frame. 6. The method according to claim 4 or 5, wherein said decoding said first DTMF signal to form an original DTMF signal comprises: Decoding the first dual-tone multi-frequency signal according to the message length of the first voice signal, where the message length of the first dual-tone multi-frequency signal is not equal to the message length of the first voice signal . 7. A voice signal processing device, characterized in that it comprises: A receiving module, configured to receive an original DTMF signal and a first voice signal, the first voice signal being an encrypted voice signal; An encoding module, configured to encode the original DTMF signal to form a first DTMF signal; A stuffing module, configured to add stuffing bytes between the first DTMF signal and the first voice signal, where the first DTMF signal, the first voice signal, and the stuffing bytes form a service data frame; A sending module, configured to send the service data frame. 8. The device according to claim 7, wherein the encoding module comprises: An encoding unit, configured to encode the original DTMF signal according to the message length of the first voice signal, and make the message length of the formed first DTMF signal equal to that of the first voice signal The message lengths are not equal. 9. A voice signal processing device, characterized in that it comprises: A receiving module, configured to receive service data frames; An acquisition module, configured to acquire a first dual-tone multi-frequency signal and a first voice signal from the service data frame, where the first voice signal is an encrypted voice signal; Decryption and decoding module, used to decrypt the first voice signal to form an original voice signal, and decode the first DTMF signal to form an original DTMF signal; A sending module, configured to send the original voice signal and the original DTMF signal. 10. The device according to claim 9, wherein the acquiring module comprises: a detection unit, configured to detect stuffing bytes in the service data frame, where the stuffing bytes are located between the first DTMF signal and the first voice signal; a deletion unit, configured to delete the padding bytes in the service data frame; An acquiring unit, configured to acquire the first DTMF signal and the first voice signal after deleting the padding bytes according to the message length of the service data frame. 11. A speech signal processing system, comprising: a first speech signal processing device and a second speech signal processing device, characterized in that, The first voice signal processing device is used to receive an original DTMF signal and a first voice signal, and the first voice signal is an encrypted voice signal; encode the original DTMF signal, Form the first dual-tone multi-frequency signal; Add stuffing bytes between the first dual-tone multi-frequency signal and the first voice signal, and the first dual-tone multi-frequency signal, the first voice signal and the stuffing bytes form a service data frame; sending the service data frame to the second audio signal processing device; The second voice signal processing device receives the service data frame sent from the first voice signal processing device; obtains a first dual-tone multi-frequency signal and a first voice signal from the service data frame, and the first The voice signal is a voice signal after encryption processing; the first voice signal is decrypted to form an original voice signal, and the first DTMF signal is decoded to form an original DTMF signal; The original voice signal and the original DTMF signal. 12. The system of claim 11, further comprising: The switching device is configured to receive the original voice signal and the original DTMF signal sent from the second voice signal processing device, and obtain dialing information from the original DTMF signal.

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