CN107172313A - Method, device, mobile terminal and storage medium for improving hands-free call quality - Google Patents

Abstract

The embodiment of the invention provides a method, a device, a mobile terminal and a storage medium for improving the hands-free call quality, wherein the method comprises the following steps: monitoring an uplink channel and a downlink channel of a call when the mobile terminal is in a hands-free call mode, determining a call state, if the mobile terminal is in a double-talk call state, analyzing a downlink voice signal acquired from the downlink channel to obtain frequency spectrum characteristics of sounds of different sources, identifying echo frequency spectrum characteristics from the frequency spectrum characteristics of the sounds, and performing frequency spectrum attenuation processing on the sound to which the echo frequency spectrum characteristics belong according to a first frequency spectrum attenuation parameter, so that echo can be suppressed, and the voice signal of an opposite-end caller cannot be damaged or distorted, so that the local-end caller hears coherent sound, and the voice communication quality is improved.

Description

Method, device, mobile terminal and storage medium for improving hands-free call quality

technical field

The invention relates to the technical field of mobile terminals, in particular to a method, device, mobile terminal and storage medium for improving the quality of hands-free calls.

Background technique

In the prior art, users often use mobile phones to make hands-free calls or video chats. When they are in the state of double talk, echo problems often occur. The so-called echo means that the microphone of the caller at the other end is collecting the voice signal of the caller at the other end. At the same time, the collected voice signal broadcast by the local caller and the collected sound produced by the closed environment with reflection are called echo. When all the sounds are sent to the caller at the local end, the caller at the local end will hear the echo while hearing the voice signal of the caller at the other end. Therefore, in order to avoid the impact of the echo on the call quality, it is necessary to The sound is echo-suppressed, but this suppression processing method will also affect the voice signal of the caller at the opposite end. While eliminating the echo, it will also destroy the voice signal of the caller at the opposite end to a certain extent, resulting in signal distortion. The caller at the end hears intermittent sound, which affects the quality of voice communication.

Contents of the invention

Embodiments of the present invention provide a method, device, mobile terminal, and storage medium for improving the quality of hands-free calls, which can solve the problem existing in the prior art when performing echo suppression processing on all sounds collected by the microphone of the caller at the opposite end. It will affect the voice signal of the caller at the opposite end. While eliminating the echo, it will also destroy the voice signal of the caller at the opposite end to a certain extent, causing signal distortion, so that the caller at the local end hears a stuttering and intermittent sound. Technical issues affecting the quality of voice communications.

In order to achieve the above purpose, the first aspect of the embodiment of the present invention provides a method for improving the quality of hands-free calls, including:

When the mobile terminal is in the hands-free call mode, monitor the uplink channel and downlink channel of the call to determine the call status;

If the mobile terminal is in a dual-speak state, then analyze the downlink voice signal obtained from the downlink channel to obtain the spectrum characteristics of each sound from different sources;

The echo spectrum feature is identified from the spectrum features of each sound, and the spectrum attenuation process is performed on the sound to which the echo spectrum feature belongs according to the first spectrum attenuation parameter.

In order to achieve the above purpose, the second aspect of the embodiment of the present invention provides a device for improving the quality of hands-free calls, including:

The monitoring module is used to monitor the uplink channel and downlink channel of the call when the mobile terminal is in the hands-free call mode, and determine the call state;

The first analysis module is used to analyze the downlink voice signal obtained from the downlink channel if the mobile terminal is in a dual-talk communication state, and obtain the spectrum characteristics of each sound from different sources;

The first attenuation module is configured to identify the echo spectrum feature from the spectrum features of the sounds, and perform spectrum attenuation processing on the sound to which the echo spectrum feature belongs according to the first spectrum attenuation parameter.

To achieve the above object, the third aspect of the embodiment of the present invention provides a mobile terminal, including: a memory, a processor, and a computer program stored in the memory and operable on the processor, wherein the processor executes the When the above computer program is used, each step in the method for improving the quality of hands-free calls described in the first aspect is implemented.

In order to achieve the above object, the fourth aspect of the embodiment of the present invention provides a storage medium, the storage medium is a computer-readable storage medium, and a computer program is stored thereon, and it is characterized in that, when the computer program is executed by a processor, Each step in the method for improving the quality of hands-free calls described in the first aspect is realized.

An embodiment of the present invention provides a method, device, mobile terminal and storage medium for improving the quality of a hands-free call. The method includes: when the mobile terminal is in the hands-free call mode, monitor the uplink channel and downlink channel of the call, determine the call state, If the mobile terminal is in the state of double talk, then analyze the downlink voice signal obtained from the downlink channel to obtain the spectrum characteristics of each sound from different sources, identify the echo spectrum characteristics from the spectrum characteristics of each sound, and according to the first spectrum attenuation parameter Perform spectrum attenuation processing on the sound to which the echo spectrum feature belongs. Compared with the prior art, in the hands-free call mode, when the mobile terminal is in the dual-talk talk state, the echo spectrum feature is identified from the downlink voice signal in the downlink channel, and the echo spectrum feature is identified according to the first spectrum attenuation parameter. Spectrum attenuation processing is performed on the belonging sound, so that the echo can be suppressed, and the voice signal of the caller at the other end will not be destroyed and the signal will not be distorted, so that the caller at the local end hears a coherent sound, improving the quality of voice communication .

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 creative work.

Fig. 1 is a structural block diagram of a mobile terminal;

FIG. 2 is a schematic flowchart of a method for improving the quality of hands-free calls provided by the first embodiment of the present invention;

Fig. 3 is a schematic flow chart of the detailed steps of step 201 in the first implementation of the present invention;

Fig. 4 is a schematic flow chart of the detailed steps of step 203 in the first implementation of the present invention;

FIG. 5 is a schematic flowchart of a method for improving the quality of hands-free calls provided by the second embodiment of the present invention;

Fig. 6 is a schematic structural diagram of a device for improving the quality of hands-free calls provided by the third embodiment of the present invention;

FIG. 7 is a schematic diagram of a detailed structure of the monitoring module 601 in the third embodiment of the present invention;

FIG. 8 is a schematic diagram of the detailed structure of the first attenuation module 603 in the third embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a device for improving the quality of a hands-free call according to a fourth embodiment of the present invention.

detailed description

In order to make the purpose, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described The embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present invention.

Fig. 1 shows a structural block diagram of a mobile terminal. The method for improving the quality of hands-free calls provided by the embodiments of the present invention can be applied to the mobile terminal 10 shown in Figure 1. The mobile terminal 10 can include, but is not limited to: a smart phone that needs to rely on batteries to maintain normal operation and supports network and download functions. Mobile phones, notebooks, tablets, wearable smart devices, etc.

As shown in Figure 1, the mobile terminal 10 includes a memory 101, a storage controller 102, one or more (only one is shown in the figure) processors 103, a peripheral interface 104, a radio frequency module 105, a button module 106, an audio module 107 and a touch screen 108 . These components communicate with each other via one or more communication buses/signal lines 109 .

It can be understood that the structure shown in FIG. 1 is only for illustration, and does not limit the structure of the mobile terminal. The mobile terminal 10 may also include more or fewer components than those shown in FIG. 1 , or have a different configuration than that shown in FIG. 1 . Each component shown in FIG. 1 may be implemented by hardware, software or a combination thereof.

The memory 101 can be used to store software programs and modules, such as program instructions/modules corresponding to the method and device for improving the quality of hands-free calls in the embodiment of the present invention, and the processor 103 runs the software programs and modules stored in the memory 101, thereby Execute various functional applications and data processing, that is, realize the above-mentioned method and device for improving the quality of hands-free calls.

The memory 101 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 101 may further include a memory that is remotely located relative to the processor 103, and these remote memories may be connected to the mobile terminal 10 through a network. Examples of the aforementioned networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof. Access to the memory 101 by the processor 103 and possibly other components may be under the control of the memory controller 102 .

The peripheral interface 104 couples various input/output devices to the CPU and the memory 101 . The processor 103 runs various software and instructions in the memory 101 to execute various functions of the mobile terminal 10 and perform data processing.

In some embodiments, peripheral interface 104, processor 103, and memory controller 102 may be implemented in a single chip. In some other instances, they can be implemented by independent chips respectively.

The radio frequency module 105 is used to receive and send electromagnetic waves, realize mutual conversion between electromagnetic waves and electrical signals, and communicate with communication networks or other devices. The radio frequency module 105 may include various existing circuit elements for performing these functions, such as antenna, radio frequency transceiver, digital signal processor, encryption/decryption chip, Subscriber Identity Module (SIM) card, memory and so on. The radio frequency module 105 can communicate with various networks such as the Internet, an intranet, a preset type of wireless network, or communicate with other devices through a preset type of wireless network. The aforementioned preset type of wireless network may include a cellular telephone network, a wireless local area network or a metropolitan area network. The aforementioned preset type of wireless network can use various communication standards, protocols and technologies, including but not limited to Global System for Mobile Communication (GSM), Enhanced Data GSM Environment (EDGE) , Wideband Code Division Multiple Access (W-CDMA), Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Bluetooth, Wi-Fi Technology (Wireless-Fidelity, WiFi) (such as IEEE802.11a, IEEE 802.11b, IEEE802.11g and/or IEEE 802.11n), Internet telephony (Voice over Internet Protocol, VoIP), global microwave interconnection In (Worldwide Interoperability for Microwave Access, Wi-Max), other protocols used for mail, instant messaging and short messages, and any other suitable communication protocols.

The button module 106 provides an interface for the user to input to the mobile terminal, and the user can press different buttons to make the mobile terminal 10 perform different functions.

The audio module 107 provides an audio interface to the user, which may include one or more microphones, one or more speakers, and audio circuitry. The audio circuit receives sound data from the peripheral interface 104, converts the sound data into electrical information, and transmits the electrical information to the speaker. Speakers convert electrical information into sound waves that can be heard by the human ear. The audio circuit also receives electrical information from the microphone, converts the electrical signal into sound data, and transmits the sound data to the peripheral interface 104 for further processing. Audio data can be obtained from the memory 101 or through the radio frequency module 105 . In addition, the audio data can also be stored in the memory 101 or sent through the radio frequency module 105 . In some examples, the audio module 107 may further include an earphone jack for providing an audio interface for earphones or other devices.

The touch screen 108 simultaneously provides an output and input interface between the mobile terminal and the user. Specifically, the touch screen 108 displays video output to the user, and the content of the video output may include text, graphics, video, and any combination thereof. Some output results correspond to some user interface objects. The touch screen 108 also receives user input, such as user gesture operations such as clicking and sliding, so that the user interface objects respond to these user inputs. The technique for detecting user input may be based on resistive, capacitive or any other possible touch detection techniques. Specific examples of the display unit of the touch screen 108 include, but are not limited to, liquid crystal displays or light emitting polymer displays.

The method for improving the quality of a hands-free call in the embodiment of the present invention is described based on the above mobile terminal.

In the prior art, when the echo suppression processing is performed on all the sounds collected by the microphone of the caller at the opposite end, the voice signal of the caller at the opposite end will be affected, and the call at the opposite end will be destroyed to a certain extent while the echo is eliminated. The voice signal of the caller causes the signal to be distorted, so that the caller at the local end hears a stuttering sound, which affects the technical problem of the voice communication quality.

In order to solve the above problems, the embodiment of the present invention proposes a method for improving the quality of hands-free calls. In the hands-free call mode, when the mobile terminal is in the state of dual-talk talk, the echo spectrum is identified from the downlink voice signal in the downlink channel. feature, and perform spectrum attenuation processing on the sound to which the echo spectrum feature belongs according to the first spectrum attenuation parameter, so that the echo can be suppressed, and the voice signal of the caller at the opposite end will not be destroyed and the signal will not be distorted, so that the local end What the caller hears is a coherent voice, which improves the quality of voice communication.

Please refer to FIG. 2 , which is a schematic flowchart of a method for improving the quality of hands-free calls provided by the first embodiment of the present invention, the method includes:

Step 201, when the mobile terminal is in the hands-free call mode, monitor the uplink channel and downlink channel of the call, and determine the call state;

In the embodiment of the present invention, the above-mentioned method for improving the quality of hands-free calls includes a device for improving the quality of hands-free calls. The device is a program module stored in a computer-readable storage medium of a mobile terminal and can be executed by a processor.

When the mobile terminal is in the hands-free call mode, monitoring the uplink channel and downlink channel of the call refers to monitoring the uplink channel and downlink channel of the caller at one end. The uplink channel and the downlink channel are used to obtain signals from the uplink channel and the downlink channel respectively, and the obtained signals are analyzed to determine the call status.

Step 202, if the mobile terminal is in the dual-speak state, analyze the downlink voice signal obtained from the downlink channel to obtain the spectrum characteristics of sounds from different sources;

In the embodiment of the present invention, the double-talk talk state means that the uplink channel and the downlink channel of the caller at the local end have signal transmission at the same time. When in the double-talk talk state, analyze the downlink voice signal obtained from the downlink channel, wherein the above The downlink voice signal acquired by the channel is for the caller at the local end. For the caller at the other end, the downlink voice signal acquired through the downlink channel is actually the uplink voice signal of the caller at the other end.

Among them, each sound from different sources can be a variety of people or objects or equipment that can produce sound, such as callers, TVs, animals, machines, etc. The spectral characteristics of the sound are the main physical parameters of the sound, and the spectral characteristics of the sound can be It is shown by electrical instruments that the spectral characteristics of each sound are different, and different sounds can be determined through the spectral characteristics of the sound.

Step 203: Identify the echo spectrum feature from the spectrum features of the sounds, and perform spectrum attenuation processing on the sound to which the echo spectrum feature belongs according to the first spectrum attenuation parameter.

In the embodiment of the present invention, the first spectrum attenuation parameter is a preset parameter, which can be modified according to requirements such as the environment. For example, if the first spectral attenuation parameter is 500 Hz, the sound to which the echo spectral feature belongs is subjected to spectral attenuation processing, and the attenuation degree is 500 Hz.

In the embodiment of the present invention, when the mobile terminal is in the hands-free call mode, the uplink channel and downlink channel of the call are monitored to determine the call state, and if the mobile terminal is in the dual-talk talk state, the downlink voice signal obtained from the downlink channel is analyzed, The spectral features of each sound from different sources are obtained, the echo spectral feature is identified from the spectral features of each sound, and the spectral attenuation process is performed on the sound to which the echo spectral feature belongs according to the first spectral attenuation parameter. Compared with the prior art, in the hands-free call mode, when the mobile terminal is in the dual-talk talk state, the echo spectrum feature is identified from the downlink voice signal in the downlink channel, and the echo spectrum feature is identified according to the first spectrum attenuation parameter. Spectrum attenuation processing is performed on the belonging sound, so that the echo can be suppressed, and the voice signal of the caller at the other end will not be destroyed and the signal will not be distorted, so that the caller at the local end hears a coherent sound, improving the quality of voice communication .

Please refer to FIG. 3, which is a schematic flow chart of the detailed steps of step 201 in the first embodiment of the present invention, including:

Step 301, when the mobile terminal is in the hands-free call mode, monitor the uplink channel and the downlink channel, and acquire uplink voice signals and downlink voice signals;

Step 302. Determine a call state according to the uplink voice signal and the downlink voice signal.

In the embodiment of the present invention, the voice amplitude of the uplink voice signal and the voice amplitude of the downlink voice signal are determined. For the caller at the local end, if the voice amplitude of the uplink voice signal is greater than the preset threshold and the If the voice amplitude is greater than the preset threshold, it is determined that the call state is a double-talk call state; if the voice amplitude of the uplink voice signal is less than or equal to the preset threshold, and the voice amplitude of the downlink voice signal is greater than the preset threshold, then the call state is determined It is in single-speak state. For example, the preset threshold is 20, the voice amplitude of the uplink voice signal is 30, the voice amplitude of the downlink voice signal is 32, and the voice amplitude of the uplink voice signal and the voice amplitude of the downlink voice signal are greater than the preset threshold, then Make sure the call state is a double-talk call state. If the preset threshold is 20, the voice amplitude of the uplink voice signal is 10, the voice amplitude of the downlink voice signal is 30, the voice amplitude of the uplink voice signal is less than 20, and the voice amplitude of the downlink voice signal is greater than 20, then determine The call state is a single talk call state.

Wherein, the voice amplitude of the above-mentioned uplink voice signal and the voice amplitude of the above-mentioned downlink voice signal are not limited to the voice amplitude of human voice, and may also be voices produced by machines.

Wherein, the preset threshold can be modified according to actual requirements.

In the embodiment of the present invention, by monitoring the uplink channel and the downlink channel, the uplink voice signal and the downlink voice signal are obtained, and the voice amplitudes of the uplink voice signal and the downlink voice signal are compared with preset thresholds respectively, which can quickly and easily determine call status.

Please refer to FIG. 4, which is a schematic flow chart of the detailed steps of step 203 in the first embodiment of the present invention, including:

Step 401, searching for a preset spectral feature library, and judging whether there is a spectral feature matching the spectral feature in the spectral feature library among the spectral features of each sound;

Step 402: If there is a matching spectral feature, determine the matching spectral feature as the echo spectral feature, and perform spectrum attenuation processing on the sound to which the echo spectral feature belongs according to a first spectral attenuation parameter.

In the embodiment of the present invention, a spectral feature library is preset in the mobile terminal, including the spectral features of one or more users, wherein the spectral feature library is preset in the mobile terminal of the caller at the opposite end. For example, the voice signal of the caller at the local end is acquired in advance, and the spectral characteristics of the voice signal are stored in the mobile terminal of the caller at the opposite end as a preset spectral feature library. Using the spectral feature library, the spectral features of each sound Identify the echo spectrum feature, and perform spectrum attenuation processing on the sound to which the echo spectrum feature belongs according to the first spectrum attenuation parameter, so that the echo can be suppressed without destroying the voice signal of the caller at the other end or causing signal distortion , so that the caller at the local end hears a coherent voice, improving the quality of voice communication.

Please refer to FIG. 5, which is a schematic flowchart of a method for improving the quality of hands-free calls provided by the second embodiment of the present invention, the method includes:

Step 501, when the mobile terminal is in the hands-free call mode, monitor the uplink channel and downlink channel of the call, and determine the call state;

Step 502, if the mobile terminal is in the dual-speak state, analyze the downlink voice signal obtained from the downlink channel to obtain the spectrum characteristics of the sounds from different sources;

Step 503, identifying echo spectral features from the spectral features of each sound, and performing spectral attenuation processing on the sound to which the echo spectral feature belongs according to the first spectral attenuation parameter;

It can be understood that steps 501 to 503 are similar to the contents described in steps 201 to 203 in the first embodiment, and details can be referred to in the first embodiment, and details are not repeated here.

Step 504, if the mobile terminal is in a single-talk communication state, analyze the downlink voice signal obtained from the downlink channel to obtain the spectrum characteristics of sounds from different sources;

In the embodiment of the present invention, taking the caller at the local end as an example, the single-talk conversation state in the embodiment of the present invention means that the uplink channel of the caller at the local end has no signal transmission and the downlink channel has signal transmission. state, analyze the downlink voice signal obtained from the downlink channel, wherein the downlink voice signal acquired by the above downlink channel is for the caller at the local end, and for the caller at the opposite end, the downlink voice signal obtained by the above downlink channel is actually the caller at the opposite end The uplink voice signal of the caller's uplink channel.

Among them, each sound from different sources can be a variety of people or objects or equipment that can produce sound, such as callers, TVs, animals, machines, etc. The spectral characteristics of the sound are the main physical parameters of the sound, and the spectral characteristics of the sound can be It is shown by electrical instruments that the spectral characteristics of each sound are different, and different sounds can be determined through the spectral characteristics of the sound.

Step 505: Identify the echo spectral feature from the spectral features of each sound, and perform spectrum attenuation processing on the sound to which the echo spectral feature belongs according to a second spectral attenuation parameter, wherein the second spectral attenuation parameter is greater than the specified The first spectrum attenuation parameter is described.

In the embodiment of the present invention, in the double talk state, the downlink voice signal of the downlink channel includes the voice signal of the caller at the opposite end, including the echo of the caller at the local end, and the downlink voice signal is analyzed to obtain the sounds from different sources. The spectral characteristics of the echo of the caller at the local end and the spectral characteristics of the voice signal of the caller at the opposite end will inevitably have the same characteristics. Spectrum attenuation processing of sound will not only eliminate the echo, but also destroy the voice signal of the caller at the other end, resulting in signal distortion.

In the embodiment of the present invention, the second spectrum attenuation parameter is a preset parameter that can be modified according to requirements such as the environment, and the second spectrum attenuation parameter is greater than the first spectrum attenuation parameter. For example, if the first spectral attenuation parameter is 500 Hz, then the sound to which the echo spectral feature belongs is subjected to spectral attenuation processing, and the attenuation degree is 500 Hz, and the second spectral attenuation parameter is 600 Hz, then the sound to which the echo spectral feature belongs is subjected to spectral attenuation processing, the attenuation degree is 600 Hz, and the attenuation degree of the spectrum attenuation processing according to the second spectrum attenuation parameter is stronger than the attenuation degree of the spectrum attenuation processing according to the first spectrum attenuation parameter, which can ensure that the attenuation degree No change, that is, the effect of echo suppression remains unchanged, ensuring that there is no echo phenomenon. In the state of double talk, if the echo spectrum characteristics are identified from the downlink voice signal in the downlink channel, the attenuation parameter of echo suppression is reduced, and the first spectrum attenuation is followed. The parameter performs spectrum attenuation processing on the sound to which the echo spectrum feature belongs, so that the echo can be suppressed without destroying the voice signal of the caller at the other end or causing signal distortion, so that what the caller at the local end hears is coherent Sound to improve the quality of voice communication.

Please refer to Figure 6, which is a schematic structural diagram of a device for improving the quality of hands-free calls provided by the third embodiment of the present invention, including:

The monitoring module 601 is used to monitor the uplink channel and downlink channel of the call when the mobile terminal is in the hands-free call mode, and determine the call state;

In the embodiment of the present invention, the above-mentioned device for improving the quality of a hands-free call is a program module, which is stored in a computer-readable storage medium of the mobile terminal and can be executed by a processor.

When the mobile terminal is in the hands-free call mode, the monitoring module 601 monitors the uplink channel and downlink channel of the call, which refers to monitoring the uplink channel and downlink channel of the caller at one end. The uplink channel and downlink channel of the caller's call, and obtain signals from the uplink channel and downlink channel respectively, analyze the acquired signal, and determine the call status.

The first analysis module 602 is used to analyze the downlink voice signal obtained from the downlink channel if the mobile terminal is in a dual-talk communication state, and obtain the spectrum characteristics of each sound from different sources;

In the embodiment of the present invention, the double-speak talk state means that the uplink channel and the downlink channel of the caller at the local end have signal transmission at the same time. When in the double-talk talk state, the first analysis module 602 analyzes the downlink voice signal obtained from the downlink channel , wherein the downlink voice signal acquired by the downlink channel is for the caller at the local end, and for the caller at the other end, the downlink voice signal acquired by the downlink channel is actually the uplink voice signal of the uplink channel of the caller at the opposite end.

Among them, each sound from different sources can be a variety of people or objects or equipment that can produce sound, such as callers, TVs, animals, machines, etc. The spectral characteristics of the sound are the main physical parameters of the sound, and the spectral characteristics of the sound can be It is shown by electrical instruments that the spectral characteristics of each sound are different, and different sounds can be determined through the spectral characteristics of the sound.

The first attenuation module 603 is configured to identify the echo spectrum feature from the spectrum features of the sounds, and perform spectrum attenuation processing on the sound to which the echo spectrum feature belongs according to a first spectrum attenuation parameter.

In the embodiment of the present invention, the first spectrum attenuation parameter is a preset parameter, which can be modified according to requirements such as the environment. For example, if the first spectral attenuation parameter is 500 Hz, the sound to which the echo spectral feature belongs is subjected to spectral attenuation processing, and the attenuation degree is 500 Hz.

In the embodiment of the present invention, when the mobile terminal is in the hands-free call mode, the monitoring module 601 monitors the uplink channel and downlink channel of the call, and determines the call status. The downlink voice signal acquired by the downlink channel obtains the spectral features of each sound from different sources, and the first attenuation module 603 identifies the echo spectral feature from the spectral features of each sound, and according to the first spectral attenuation parameter, the sound to which the echo spectral feature belongs Perform spectrum attenuation processing. Compared with the prior art, in the hands-free call mode, when the mobile terminal is in the dual-talk talk state, the echo spectrum feature is identified from the downlink voice signal in the downlink channel, and the echo spectrum feature is identified according to the first spectrum attenuation parameter. Spectrum attenuation processing is performed on the belonging sound, so that the echo can be suppressed, and the voice signal of the caller at the other end will not be destroyed and the signal will not be distorted, so that the caller at the local end hears a coherent sound, improving the quality of voice communication .

Please refer to FIG. 7 , which is a detailed structural schematic diagram of the monitoring module 601 in the third embodiment of the present invention, including:

The monitoring unit 701 is configured to monitor the uplink channel and the downlink channel when the mobile terminal is in the hands-free call mode, and obtain the uplink voice signal and the downlink voice signal;

The first determining unit 702 is configured to determine a call state according to the uplink voice signal and the downlink voice signal.

In the embodiment of the present invention, the voice amplitude of the uplink voice signal and the voice amplitude of the downlink voice signal are determined, if the voice amplitude of the uplink voice signal is greater than a preset threshold, and the voice amplitude of the downlink voice signal is greater than a preset threshold, Then it is determined that the call state is a double talk call state, if the voice amplitude of the uplink voice signal is less than or equal to the preset threshold, and the voice amplitude of the downlink voice signal is greater than the preset threshold, then it is determined that the call state is a single talk call state. For example, the preset threshold is 20, the voice amplitude of the uplink voice signal is 30, the voice amplitude of the downlink voice signal is 32, and the voice amplitude of the uplink voice signal and the voice amplitude of the downlink voice signal are greater than the preset threshold, then Make sure the call state is a double-talk call state. If the preset threshold is 20, the voice amplitude of the uplink voice signal is 10, the voice amplitude of the downlink voice signal is 30, the voice amplitude of the uplink voice signal is less than 20, and the voice amplitude of the downlink voice signal is greater than 20, then determine The call state is a single talk call state.

Wherein, the voice amplitude of the above-mentioned uplink voice signal and the voice amplitude of the above-mentioned downlink voice signal are not limited to the voice amplitude of human voice, and may also be voices produced by machines.

Wherein, the preset threshold can be modified according to actual requirements.

In the embodiment of the present invention, by monitoring the uplink channel and the downlink channel, the uplink voice signal and the downlink voice signal are obtained, and the voice amplitudes of the uplink voice signal and the downlink voice signal are compared with preset thresholds respectively, which can quickly and easily determine call status.

Please refer to FIG. 8, which is a schematic diagram of the detailed structure of the first attenuation module 603 in the third embodiment of the present invention, including:

A judging unit 801, configured to search a preset spectral feature library, and judge whether there is a spectral feature matching the spectral feature in the spectral feature library among the spectral features of each sound;

The second determining unit 802 is configured to, if there is a matching spectral feature, determine the matching spectral feature as the echo spectral feature, and perform spectral attenuation on the sound to which the echo spectral feature belongs according to the first spectral attenuation parameter deal with.

In the embodiment of the present invention, a spectral feature library is preset in the mobile terminal, including the spectral features of one or more users, wherein the spectral feature library is preset in the mobile terminal of the caller at the opposite end. For example, the voice signal of the caller at the local end is acquired in advance, and the spectral characteristics of the voice signal are stored in the mobile terminal of the caller at the opposite end as a preset spectral feature library. Using the spectral feature library, the spectral features of each sound Identify the echo spectrum feature, and perform spectrum attenuation processing on the sound to which the echo spectrum feature belongs according to the first spectrum attenuation parameter, so that the echo can be suppressed without destroying the voice signal of the caller at the other end or causing signal distortion , so that the caller at the local end hears a coherent voice, improving the quality of voice communication.

Please refer to Fig. 9, which is a schematic structural diagram of a device for improving the quality of hands-free calls provided by the fourth embodiment of the present invention, including:

The monitoring module 601 is used to monitor the uplink channel and downlink channel of the call when the mobile terminal is in the hands-free call mode, and determine the call state;

The first analysis module 602 is used to analyze the downlink voice signal obtained from the downlink channel if the mobile terminal is in a dual-talk communication state, and obtain the spectrum characteristics of each sound from different sources;

The first attenuation module 603 is configured to identify the echo spectral features from the spectral features of the sounds, and perform spectrum attenuation processing on the sound to which the echo spectral features belong according to the first spectral attenuation parameter;

It can be understood that the monitoring module 601, the first analysis module 602 and the first attenuation module 603 in the embodiment of the present invention are respectively described with the monitoring module 601, the first analysis module 602 and the first attenuation module 603 in the third embodiment The content is similar, and details can be referred to the third embodiment, which will not be repeated here.

The second analysis module 901 is configured to analyze the downlink voice signal obtained from the downlink channel if the mobile terminal is in a single-talk communication state, to obtain the spectrum characteristics of sounds from different sources;

In the embodiment of the present invention, taking the caller at the local end as an example, the single-talk conversation state in the embodiment of the present invention means that the uplink channel of the caller at the local end has no signal transmission and the downlink channel has signal transmission. state, the second analysis module 901 analyzes the downlink voice signal acquired from the downlink channel, wherein the downlink voice signal acquired by the above-mentioned downlink channel is for the caller at the local end, and for the caller at the other end, the downlink voice signal acquired by the above-mentioned downlink channel The signal is actually the uplink voice signal of the uplink channel of the caller at the opposite end.

Among them, each sound from different sources can be a variety of people or objects or equipment that can produce sound, such as callers, TVs, animals, machines, etc. The spectral characteristics of the sound are the main physical parameters of the sound, and the spectral characteristics of the sound can be It is shown by electrical instruments that the spectral characteristics of each sound are different, and different sounds can be determined through the spectral characteristics of the sound.

The second attenuation module 902 is configured to identify the echo spectral features from the spectral features of each sound, and perform spectrum attenuation processing on the sound to which the echo spectral features belong according to a second spectral attenuation parameter, wherein the second The spectrum attenuation parameter is greater than the first spectrum attenuation parameter.

In the embodiment of the present invention, in the double talk state, the downlink voice signal of the downlink channel includes the voice signal of the caller at the opposite end, including the echo of the caller at the local end, and the downlink voice signal is analyzed to obtain the sounds from different sources. The spectral characteristics of the echo of the caller at the local end and the spectral characteristics of the voice signal of the caller at the opposite end will inevitably have the same characteristics. Spectrum attenuation processing of sound will not only eliminate the echo, but also destroy the voice signal of the caller at the other end, resulting in signal distortion.

In the embodiment of the present invention, the second spectrum attenuation parameter is a preset parameter that can be modified according to requirements such as the environment, and the second spectrum attenuation parameter is greater than the first spectrum attenuation parameter. For example, if the first spectral attenuation parameter of a double-talk call is 500 Hz, then the sound to which the echo spectral feature belongs is subjected to spectral attenuation processing, and the attenuation degree is 500 Hz, and the second spectral attenuation parameter is 600 Hz, then the sound to which the echo spectral feature belongs Perform spectrum attenuation processing, the attenuation degree is 600 Hz, the attenuation degree of the spectrum attenuation processing according to the second spectrum attenuation parameter is stronger than the attenuation degree of the spectrum attenuation processing according to the first spectrum attenuation parameter, so that it can be guaranteed that in the single-talk communication state , the degree of attenuation remains unchanged, that is, the effect of echo suppression remains unchanged, ensuring that there is no echo phenomenon. In the state of double talk, if the echo spectrum characteristics are identified from the downlink voice signal in the downlink channel, the attenuation parameter of echo suppression is reduced. A spectrum attenuation parameter performs spectrum attenuation processing on the sound to which the echo spectral feature belongs, so that the echo can be suppressed without destroying the voice signal of the caller at the other end and without causing signal distortion, so that the caller at the local end hears It is a coherent sound and improves the quality of voice communication.

An embodiment of the present invention also provides a mobile terminal, including a memory, a processor, and a computer program stored on the memory and operable on the processor. When the processor executes the computer program, the first embodiment to the second embodiment are implemented. Each step in the method for improving the quality of hands-free communication in any embodiment.

An embodiment of the present invention also provides a storage medium, which may specifically be a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, any of the first to second embodiments may be implemented. Various steps in the method for improving the quality of hands-free communication in an embodiment.

In the several embodiments provided in this application, it should be understood that the disclosed devices and methods may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the modules is only a logical function division. In actual implementation, there may be other division methods. For example, multiple modules or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or modules may be in electrical, mechanical or other forms.

The modules described as separate components may or may not be physically separated, and the components displayed as modules may or may not be physical modules, that is, they may be located in one place, or may be distributed to multiple network modules. Part or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional module in each embodiment of the present invention may be integrated into one processing module, each module may exist separately physically, or two or more modules may be integrated into one module. The above-mentioned integrated modules can be implemented in the form of hardware or in the form of software function modules.

If the integrated modules are realized in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , including several instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-OnlyMemory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program codes.

It should be noted that, for the sake of simplicity of description, the aforementioned method embodiments are expressed as a series of action combinations, but those skilled in the art should know that the present invention is not limited by the described action sequence. Because of the present invention, certain steps may be performed in other orders or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification belong to preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

In the foregoing embodiments, the descriptions of each embodiment have their own emphases, and for parts not described in detail in a certain embodiment, reference may be made to relevant descriptions of other embodiments.

The above is a description of a method, device, mobile terminal and storage medium for improving the quality of hands-free calls provided by the present invention. For those skilled in the art, based on the idea of the embodiment of the present invention, in terms of specific implementation and application scope There will be changes. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims (12)

1. a kind of method for improving hand-free call quality, it is characterised in that methods described includes：

It is in mobile terminal under handsfree talk mode, monitors the up channel and down channel of call, determine talking state；

If the mobile terminal is in double downlink voice signals said talking state, parse from down channel acquisition, obtain To the spectrum signature of each sound of separate sources；

Echo spectrum signature is identified from the spectrum signature of each sound, and according to the first spectral decay parameter to described time Sound belonging to audio frequency spectrum signature carries out spectral decay processing.

2. according to the method described in claim 1, it is characterised in that the up channel and down channel of the monitoring call, really Determine talking state, including：

The up channel and the down channel are monitored, ascending voice signal and downlink voice signal is obtained；

Talking state is determined according to the ascending voice signal and the downlink voice signal.

3. method according to claim 2, it is characterised in that described according to the ascending voice signal and the descending language Message number determines talking state, including：

Determine the voice amplitude of the ascending voice signal and the voice amplitude of the downlink voice signal；

If the voice amplitude of the ascending voice signal is more than preset threshold value, and the voice amplitude of the downlink voice signal is more than The preset threshold value, it is determined that the talking state says talking state for described pair；

If the voice amplitude of the ascending voice signal is less than or equal to the preset threshold value, and the language of the downlink voice signal Sound amplitude is more than the preset threshold value, it is determined that the talking state is singly to say talking state.

4. according to according to the method described in claim 1, it is characterised in that described to be recognized from the spectrum signature of each sound Go out echo spectrum signature, including：

Search in preset spectrum signature storehouse, the spectrum signature for judging each sound, if exist and the spectrum signature storehouse In spectrum signature matching spectrum signature；

If there is the spectrum signature of matching, the spectrum signature of the matching is defined as the echo spectrum signature.

5. according to the method according to Claims 1-4 any one, it is characterised in that methods described also includes：

If the mobile terminal is in and singly says talking state, the downlink voice signal obtained from the down channel is parsed, Obtain the spectrum signature of each sound of separate sources；

Echo spectrum signature is identified from the spectrum signature of each sound, and according to the second spectral decay parameter to described time Sound belonging to audio frequency spectrum signature carries out spectral decay processing, wherein, the second spectral decay parameter is more than the described first frequency Compose attenuation parameter.

6. a kind of device for improving hand-free call quality, it is characterised in that described device includes：

Monitoring modular, for being in mobile terminal under handsfree talk mode, monitors the up channel and down channel of call, really Determine talking state；

First parsing module, if saying talking state in double for the mobile terminal, parses and is obtained from the down channel Downlink voice signal, obtain the spectrum signature of each sound of separate sources；

First attenuation module, for identifying echo spectrum signature from the spectrum signature of each sound, and according to the first frequency Compose attenuation parameter and spectral decay processing is carried out to the sound belonging to the echo spectrum signature.

7. device according to claim 6, it is characterised in that the monitoring modular includes：

Monitoring unit, for monitoring the up channel and the down channel, obtains ascending voice signal and downlink voice letter Number；

First determining unit, for determining talking state according to the ascending voice signal and the downlink voice signal.

8. device according to claim 7, it is characterised in that first determining unit includes：

First determination subelement, for determining the voice amplitude of the ascending voice signal and the voice of the downlink voice signal Amplitude；

Second determination subelement, if the voice amplitude for the ascending voice signal is more than preset threshold value, and the descending language The voice amplitude of message number is more than the preset threshold value, it is determined that the talking state says talking state for described pair；

3rd determination subelement, if the voice amplitude for the ascending voice signal is less than or equal to the preset threshold value, and The voice amplitude of the downlink voice signal is more than the preset threshold value, it is determined that the talking state is singly to say talking state.

9. according to device according to claim 6, it is characterised in that first attenuation module includes：

In judging unit, the spectrum signature storehouse preset for searching, the spectrum signature for judging each sound, if exist and institute State the spectrum signature of the spectrum signature matching in spectrum signature storehouse；

Second determining unit, if for there is the spectrum signature of matching, the spectrum signature of the matching is defined as into described return Audio frequency spectrum signature.

10. according to the device according to claim 6 to 9 any one, it is characterised in that described device also includes：

Second parsing module, singly says talking state if being in for the mobile terminal, parses and obtained from the down channel The downlink voice signal taken, obtains the spectrum signature of each sound of separate sources；

Second attenuation module, for identifying echo spectrum signature from the spectrum signature of each sound, and according to the second frequency Compose attenuation parameter and spectral decay processing is carried out to the sound belonging to the echo spectrum signature, wherein, second spectral decay Parameter is more than the first spectral decay parameter.

11. a kind of mobile terminal, including：Memory, processor and storage are on a memory and the meter that can run on a processor Calculation machine program, it is characterised in that described in the computing device during computer program, realizes claim 1 to 5 any one institute Each step in the method for the raising hand-free call quality stated.

12. a kind of storage medium, the storage medium is computer-readable recording medium, computer program is stored thereon with, its It is characterised by, when the computer program is executed by processor, realizes that the raising described in claim 1 to 5 any one is hands-free Each step in the method for speech quality.