Method, device and system for processing voice signals

Abstract

The invention relates to a method, a device and a system for processing voice signals. The method comprises the following steps: receiving an original dual tone multiple frequency signal and a first voice signal which is encrypted; coding the original dual tone multiple frequency signal to form a first dual tone multiple frequency signal; increasing filling bytes between the first dual tone multiple frequency signal and the first voice signal, wherein the first dual tone multiple frequency signal, the first voice signal and the filling bytes form a service data frame; and sending the service data frame. In the method, the device and the system for processing the voice signals, the original DTMF signal is coded to form the first DTMF signal, and the filling bytes are increased between the first DTMF signal and the first voice signal to form the service data frame, so that the DTMF signal and the encrypted voice signal can be transmitted together in a communication network in an encryption voice communication state.

Description

technical field [0001] 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 [0002] 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 terminal-to-terminal full-process encrypted communication and terminal-to-Public Switched Telephone Network (PSTN) half-process encrypted communication. [0003] 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, adapting the transmission rate of voice data to a code stream of 64 k...

AI Technical Summary

Problems solved by technology

[0005] The inventor found 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 multiple DTMF (Dual Tone Multi-Frequency, referred to as: DTMF) signal is directly sent to the BSC through a dedicated voice communication channel. In non-encrypted communication, the BSC can mix the DTMF signal into the voice signal and send it to the opposite end; if the mobile terminal enters the encrypted communication Send DTMF signal in the state, because the BSC cannot decrypt the encrypted voice data, so it cannot mix the DTMF signal into the encrypted voice data, resulting in the inability to transmit the DTMF signal in the encrypted communication state

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