CN109920438B

CN109920438B - Method for processing talkback signal of private network terminal

Info

Publication number: CN109920438B
Application number: CN201711324672.8A
Authority: CN
Inventors: 张勇; 桑江
Original assignee: Chengdu TD Tech Ltd
Current assignee: Chengdu TD Tech Ltd
Priority date: 2017-12-13
Filing date: 2017-12-13
Publication date: 2021-04-23
Anticipated expiration: 2037-12-13
Also published as: CN109920438A

Abstract

The application discloses a method for processing a talkback signal of a private network terminal, which comprises the following steps: decoding the main speaking prompt tone into PCM data and storing the PCM data in the ADSP; after initiating the voice service, the AP performs control processing of the voice service; after the control processing is finished, the AP controls the ADSP to send the PCM data of the main speaking prompt tone to a coder-decoder for processing and then playing; and after the talkback prompt tone is played, the AP controls the ADSP to process the voice service of the talkback. By the application, the signal processing performance can be improved, and the voice call quality can be improved.

Description

Method for processing talkback signal of private network terminal

Technical Field

The present application relates to a private network communication system, and more particularly, to a method for processing a talkback signal of a private network terminal.

Background

With the rapid development of the industries such as public safety, government affairs, traffic, energy and the like in China and the construction of safe cities and smart cities, the requirements of government users and industry users on broadband wireless data services and multimedia cluster command and scheduling are continuously released, the rapid development of broadband private networks is promoted, and the performance requirements of private network terminals in all aspects are higher and higher. Due to the real-time performance and the straight-through performance of the private network terminal voice service, a main speaking prompt tone is required to exist, and the optimization of the main speaking prompt tone playing is more obvious in improvement of the terminal performance.

The private network terminal talkback prompt tone has the function of prompting that the user terminal is ready and can carry out talkback action. The prior art realizes the main speaking prompt tone of the private network terminal, and comprises the following steps: on one hand, a music player is established through the upper layer of the system, the player is used for playing the audio file of the main speaking prompt tone, on the other hand, the audio module waits for a fixed time, and after the prompt tone is completely played, the main speaking action is carried out. In the implementation of the main speech prompt tone, the processes of decoding audio, creating and releasing a player, transmitting audio data and the like are included, and the process is a complete media (media) playing process.

A common private network terminal talkback voice processing flow is shown in fig. 1, an application layer (AP) first performs a control flow including the work of an audio mode and an audio channel, and after the control flow is completed, an audio module waits for a fixed time; meanwhile, the AP starts a processing flow required for alert tone playing from an upper layer, specifically including a media player (media player) application and release, alert tone data decoding and data transmission to Codec after decoding, and playing through a Speaker (Speaker). When the audio module waits for a certain time, the AP continues to send a control message to the ADSP to enable the ADSP to perform a voice data processing process, and the voice data is transmitted to the ADSP through a microphone (Mic) and a Codec for processing and then transmitted through a Modem. The voice processing sequence of the audio module is completely separated from the prompt tone playing.

In practical application, the above-mentioned method for processing the talkback voice has the problems of low stability, poor anti-interference capability and large time delay, and is contrary to the real-time property, stability and rapidity required by the voice communication of the private network terminal, and sometimes the phenomenon that the talkback prompt tone leaks to the monitoring end occurs, which affects the quality of the voice communication.

Disclosure of Invention

The application provides a method for processing a talkback signal of a private network terminal, which can improve the signal processing performance and improve the voice communication quality.

In order to achieve the purpose, the following technical scheme is adopted in the application:

a method for processing a talkback signal of a private network terminal comprises the following steps:

decoding the main speaking prompt tone into PCM data and storing the PCM data in the ADSP;

after initiating the voice service, the AP performs control processing of the voice service;

after the control processing is finished, the AP controls the ADSP to send the PCM data of the main speaking prompt tone to a coder-decoder for processing and then playing;

and after the talkback prompt tone is played, the AP controls the ADSP to process the voice service of the talkback.

According to the technical scheme, the main speech prompt tone is decoded into PCM data and stored in the ADSP; after initiating the voice service, the AP performs control processing of the voice service; after the AP finishes the control processing, the ADSP sends the PCM data of the main speaking prompt tone to a coder-decoder for decoding processing and then playing;

and after the talkback prompt tone is played, the AP controls the ADSP to process the voice service of the talkback. By the method, the signal processing performance can be improved, and the voice call quality can be improved.

Drawings

Fig. 1 is a schematic diagram of a conventional private network terminal for handling a talkback voice;

fig. 2 is a block diagram of a method for processing a talkback signal of a private network terminal according to the present application;

fig. 3 is a schematic basic flow chart of a method for processing a talkback signal of a private network terminal according to the present application.

Detailed Description

For the purpose of making the objects, technical means and advantages of the present application more apparent, the present application will be described in further detail with reference to the accompanying drawings.

In the existing method for processing the talkback signal shown in fig. 1, the processing of the talkback prompt tone is a process of performing complete media playing, and relates to the application and release of an audio player, decoding and transmission of audio data, and a system process is relatively complicated, so that the problems of low stability, poor interference resistance and large time delay exist. Meanwhile, the audio module does not sense the playing process of the prompt tone and only asynchronously waits for a period of time, and the waiting time cannot be accurately determined. It is possible to generate the main speaking prompt tone which is not played completely, but has already performed the main speaking action, causing the main speaking prompt tone to leak to the monitoring end, and affecting the quality of the voice communication.

More specifically, in the flow of fig. 1, the AP not only needs to implement a control process of the voice service, but also needs to process a playing process of the alert tone, where the playing of the alert tone involves more processing processes and system resource applications, and finally, PCM data that is decoded is played through Codec to Speaker. And the audio module can not go to the perception prompt tone and whether play is accomplished, does not play when the prompt tone and finishes just going upward the processing procedure, probably causes the main speaker end prompt tone to leak and monitor the end, influences the impression of voice conversation. The time of the private network terminal prompt tone is short, so that the audio data volume is small.

Based on the above analysis, in the implementation principle of the present application, the cue tone data is decoded into PCM data and stored in the ADSP, when initiating the private network voice service, the AP side first performs control flow processing, and before the talkback behavior, the ADSP first plays the PCM data of the cue tone, and then plays the PCM data through a downlink audio channel in Codec, and then performs the talkback voice service.

Fig. 2 is a basic block diagram of the method for processing a main signal in the present application, and fig. 3 is a basic flowchart of the method for processing a main signal in the present application. As shown in fig. 2 and 3, the method includes:

step 301, decoding the main speaking prompt tone into PCM data and storing the PCM data in ADSP.

Generally, the data amount of the main voice alert is small, so that PCM decoding data storing the alert tone in the ADSP can be completely realized.

Step 302, after initiating the voice service, the AP performs control processing of the voice service.

The control process of the voice service is the same as the existing one, and may include an audio mode, a path configuration, and the like, and after the control process is completed, step 303 is executed.

Step 303, the AP controls the ADSP to send the PCM data of the talkback alert tone to the Codec for processing and playing.

The PCM data of the main announcement tone is saved in the ADSP as described in step 301. In this step, the AP directly notifies the ADSP through the control message to play the talkback alert tone. The ADSP sends the stored PCM data to a Codec (Codec), and the Codec decodes the PCM data and plays the PCM data through a player.

Step 304, after playing the talkback prompt tone, the AP controls the ADSP to process the talkback voice service.

The AP informs the ADSP to start processing the voice service of the main talk through the control message, the main talk can start talking, and the voice data of the user is received through the microphone for processing. The processing here may be the same as in the existing manner.

And ending the flow of the talkback signal processing method of the private network terminal in the application.

In the method for processing the talkback signal, the prompt tone is stored and played by the ADSP, the AP side processing flow is simplified, the prompt tone is played only by carrying PCM data, system resource application and release are not involved, the behavior is very stable, and the stability and the anti-interference performance of the prompt tone playing behavior are improved. The time required by playing the warning tone at the bottom layer can be completely accurate to the time length of the warning tone, the playing time is stable every time, so that the waiting time of the control action of the voice service ADSP only needs to be slightly longer than the time length of the warning tone, the time delay of response initiated by the voice service can be reduced, and the playing action time of the warning tone can be accurately controlled, so that the warning tone can be prevented from being leaked to a monitoring end.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A method for processing a talkback signal of a private network terminal is characterized by comprising the following steps:

after initiating the voice service, the application layer AP performs control processing of the voice service;