CN105450880B - A voice signal processing method and device - Google Patents

Abstract

The embodiment of the invention discloses a kind for the treatment of method and apparatus of voice signal；The present embodiment is when it is determined that mobile terminal enters hand-free call, the loudspeaker of mobile terminal can be started, and mouth is played to loudspeaker and is monitored with blocking the distance of object in front of loudspeaker broadcasting mouth, if the distance is less than preset threshold value, then echo is handled using suppressing the first stronger echo cancellation algorithm of echo intensity, if conversely, the distance is more than or equal to preset threshold value, echo is handled using the second weaker echo cancellation algorithm of echo intensity is suppressed；The program can improve the inhibition of echo, greatly improve speech quality.

Description

A voice signal processing method and device

technical field

The invention relates to the field of communication technology, in particular to a method and device for processing voice signals.

Background technique

With the development of communication technology, mobile terminals, such as mobile phones and other devices, have become more and more popular, and they have become an indispensable part of people's lives. focus on.

For the convenience of users, the existing mobile terminals generally support the hands-free call function, that is, the user does not need to hold the mobile terminal, but directly places the mobile terminal on some objects, such as placing the mobile terminal on the table and turning on the speaker , and start a voice communication.

During the research and practice of the prior art, the inventor of the present invention found that, in the prior art, when the mobile terminal is placed flat on some object, such as a desktop, for hands-free conversation, due to the Reflection will generate a lot of echo signals into the microphone, which will easily introduce hands-free echo and greatly affect the call effect.

Contents of the invention

Embodiments of the present invention provide a voice signal processing method and device, which can suppress echo and improve call effect.

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

When it is determined that the mobile terminal enters the hands-free call, start the loudspeaker of the mobile terminal to play the voice signal;

Monitor the distance between the speaker playback port and the blocking object in front of the speaker playback port;

If the distance is less than the preset threshold, then use the first echo cancellation algorithm to process the echo;

If the distance is greater than or equal to the preset threshold, the second echo cancellation algorithm is used to process the echo, and the strength of the first echo cancellation algorithm to suppress the echo is greater than that of the second echo cancellation algorithm.

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

The starting unit is used to start the loudspeaker of the mobile terminal to play a voice signal when determining that the mobile terminal enters the hands-free call;

The monitoring unit is used to monitor the distance between the playback port of the speaker and the blocking object in front of the playback port of the speaker;

A first processing unit, configured to use a first echo cancellation algorithm to process the echo when the monitoring unit determines that the distance is less than a preset threshold;

The second processing unit is configured to use a second echo cancellation algorithm to process the echo when the monitoring unit determines that the distance is greater than or equal to a preset threshold, and the strength of the first echo cancellation algorithm to suppress the echo is greater than that of the second echo cancellation algorithm.

In the embodiment of the present invention, when it is determined that the mobile terminal enters the hands-free call, the speaker of the mobile terminal can be activated, and the distance between the speaker playback port and the blocking object in front of the speaker playback port can be monitored. The first echo cancellation algorithm with stronger intensity processes the echo, otherwise, if the distance is greater than or equal to the preset threshold, the second echo cancellation algorithm with weaker echo suppression intensity is used to process the echo; this scheme can be based on the mobile terminal The specific state flexibly selects the way to deal with the echo to better eliminate the echo. Therefore, the effect of suppressing the echo can be improved, and the call quality can be greatly improved.

Description of drawings

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

Fig. 1 is the flow chart of the processing method of the speech signal that the embodiment of the present invention provides;

Fig. 2 is another flowchart of the processing method of the speech signal provided by the embodiment of the present invention;

Fig. 3a is a schematic structural diagram of a speech signal processing device provided by an embodiment of the present invention;

Fig. 3b is another schematic structural diagram of a speech signal processing device provided by an embodiment 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 those skilled in the art without creative efforts fall within the protection scope of the present invention.

Embodiments of the present invention provide a voice signal processing method and device. The details will be described respectively below.

Embodiment one,

This embodiment will be described from the perspective of an apparatus for processing voice signals. Specifically, the apparatus for processing voice signals may be integrated into devices such as mobile terminals. The mobile terminals may include devices such as mobile phones or tablet computers.

A method for processing a voice signal, comprising: when determining that a mobile terminal enters a hands-free call, start a speaker of the mobile terminal to play a voice signal; monitor the distance between the playback port of the speaker and an occluded object in front of the playback port of the speaker; if the distance is less than the preset If the threshold is set, the first echo cancellation algorithm is used to process the echo; if the distance is greater than or equal to the preset threshold, the second echo cancellation algorithm is used to process the echo, and the strength of the first echo cancellation algorithm to suppress the echo is greater than that of the second echo Elimination algorithm.

As shown in Figure 1, the specific flow of the processing method of the voice signal can be as follows:

101. When it is determined that the mobile terminal enters a hands-free call, start a speaker of the mobile terminal to play a voice signal.

For example, when it is determined that the terminal enters the hands-free call, the speaker process may be invoked, the speaker process is executed to start the speaker, and a voice signal is played through the speaker.

Wherein, before determining that the mobile terminal enters the hands-free call, it may further include: acquiring a voice signal.

102. Monitor the distance between the playback port of the speaker and the blocking object in front of the playback port of the speaker.

For example, the distance sensor can be used to monitor the distance between the playback port of the speaker and the blocking object in front of the playback port of the speaker.

For example, if the speaker playback port is located at the back of the mobile terminal, a distance sensor can be added on the back of the mobile terminal, that is, the distance sensor is installed on the back of the mobile terminal. Monitor the distance of occluded objects” can include:

Determine whether the back of the mobile terminal faces the blocking object, and if the back faces the blocking object, acquire the distance between the back and the blocking object through the distance sensor.

Otherwise, if the back surface is not facing the occluding object, it can be considered that the distance between the back surface and the occluding object is far enough, and therefore, there is no need to acquire the distance between the back surface and the occluding object.

For another example, if the speaker playback port is located on the front of the mobile terminal, a distance sensor can be added on the front of the mobile terminal, that is, the distance sensor is installed on the front of the mobile terminal. Object distance monitoring" can include:

It is determined whether the mobile terminal is facing the occluding object, and if the front is facing the occluding object, the distance between the front and the occluding object is acquired by a distance sensor.

Otherwise, if the front is not facing the occluding object, it can be considered that the distance between the front and the occluding object is far enough, and therefore, there is no need to acquire the distance between the front and the occluding object.

103. Determine whether the distance is smaller than a preset threshold, if yes, perform step 104, and if not, perform step 105.

Wherein, the threshold can be set according to actual application requirements, for example, it can be fixedly set in the mobile terminal by the system in advance, and can also be set by the user himself, that is, the processing method of the voice signal can also include:

A setting request is received, and the threshold is set according to the setting request.

104. If the distance is less than the preset threshold, use the first echo cancellation algorithm to process the echo;

For example, if the distance is less than the preset threshold, the first return value may be output to call the first audio parameter, and the corresponding first echo cancellation algorithm is obtained according to the first audio parameter, and then, the first echo cancellation algorithm is used to Echoes are processed.

Wherein, the first return value, the first audio parameter and the first echo cancellation algorithm can be set according to the actual application requirements, for example, the first return value can be set to 0, the first audio parameter can be set to 1, etc., I won't repeat them here.

Different audio parameters may correspond to different echo cancellation algorithms, and the mapping relationship between audio parameters and echo cancellation algorithms may be preset in the voice information processing device, which will not be repeated here.

105. If the distance is greater than or equal to a preset threshold, use a second echo cancellation algorithm to process the echo.

For example, if the distance is greater than or equal to the preset threshold, the second return value may be output to call the second audio parameter, and the corresponding second echo cancellation algorithm is obtained according to the second audio parameter, and then, the second echo cancellation algorithm is used to Process the echo.

Wherein, the second return value, the second audio parameter and the second echo cancellation algorithm can be set according to actual application requirements, for example, corresponding to setting the first return value to 0 and setting the first audio parameter to 1 , the second return value can be set to 1, the second audio parameter can be set to 2, etc., which will not be repeated here.

Among them, the intensity of echo suppression by the first echo cancellation algorithm is greater than that of the second echo cancellation algorithm. This is because, due to the blocking of the blocking object, the voice information played by the player will be reflected by the blocking object, so that more echo signals enter the microphone. , resulting in a hands-free echo, and the closer the distance to the blocking object, for example, the mobile terminal is placed flat on the table, the greater the echo, therefore, the stronger the echo cancellation algorithm needs to be used to suppress the echo, on the contrary, if the distance The farther the occluded object is, the smaller the echo will be. Therefore, a weaker echo cancellation algorithm can be used to suppress the echo.

As can be seen from the above, in this embodiment, when it is determined that the mobile terminal enters the hands-free call, the speaker of the mobile terminal can be activated, and the distance between the playback port of the speaker and the blocking object in front of the playback port of the speaker can be monitored. If the distance is less than the preset threshold, then Use the first echo cancellation algorithm with strong echo suppression strength to process the echo, otherwise, if the distance is greater than or equal to the preset threshold, use the second echo cancellation algorithm with weak echo suppression strength to process the echo; the scheme can be based on The specific state of the mobile terminal flexibly selects the way of processing the echo, so as to better eliminate the echo. Therefore, the effect of suppressing the echo can be improved, and the call quality can be greatly improved.

Embodiment two,

According to the method described in Embodiment 1, an example will be given below for further detailed description.

In this embodiment, it will be described by taking that the voice signal processing device is specifically integrated in the mobile terminal, and the speaker playback port is located on the back of the mobile terminal as an example.

First of all, a distance sensor can be added on the back of the mobile terminal, and secondly, the distance between the back of the mobile terminal and the blocking object can be monitored through the distance sensor, and then the corresponding echo suppression method can be selected according to the distance, which will be described in detail below .

As shown in Figure 2, a method for processing a voice signal, the specific process can be as follows:

201. The mobile terminal receives a hands-free request when making a voice call.

For example, a hands-free request triggered by the user clicking or sliding a hands-free button may be received, and so on.

202. The mobile terminal activates a hands-free call function according to the hands-free request, so as to enter a hands-free call and obtain a voice signal.

203. The mobile terminal determines to start a speaker of the mobile terminal to play the voice signal.

For example, the mobile terminal can invoke a speaker process, execute the speaker process to start the speaker, and play a voice signal through the speaker.

204. The mobile terminal determines whether the back of the mobile terminal faces the blocking object, and if the back faces the blocking object, acquire the distance between the back and the blocking object through the distance sensor.

Otherwise, if the back surface is not facing the occluding object, it can be considered that the distance between the back surface and the occluding object is far enough, and therefore, there is no need to acquire the distance between the back surface and the occluding object.

205. The mobile terminal determines whether the distance is less than the preset threshold. If it is less than the preset threshold, it indicates that there is a strong reflection. Therefore, step 206 is performed. Otherwise, if it is not less than the preset threshold (that is, greater than or equal to the preset threshold), then It indicates that there is no strong reflection, therefore, step 208 can be executed.

Wherein, the threshold can be set according to actual application requirements, for example, it can be fixedly set in the mobile terminal by the system in advance, and can also be set by the user himself, that is, the processing method of the voice signal can also include:

A setting request is received, and the threshold is set according to the setting request.

206. When the mobile terminal determines that the distance is less than the preset threshold, output the first return value to call the first audio parameter, and then execute step 207.

Wherein, the first return value and the first audio parameter can be set according to the requirements of practical applications, which will not be repeated here.

For example, if the mobile terminal faces up and is placed flat on the table, the distance between the back of the mobile terminal and the occluded object can be obtained through the distance sensor, and the distance is determined to be less than the preset threshold, so the first return value is output. For example, 0 may be output to call the first audio parameter, such as call the audio parameter 1, and then perform step 207 .

207. The mobile terminal acquires a corresponding first echo cancellation algorithm according to the first audio parameter, and uses the first echo cancellation algorithm to process the echo.

For example, an echo signal may be obtained, and then the first echo cancellation algorithm is used to generate a suppression signal whose waveform is opposite to the echo signal, and then the suppression signal is used to cancel the echo signal, and so on.

Wherein, the first echo cancellation algorithm may be set according to actual application requirements, which will not be repeated here.

208. When determining that the distance is greater than or equal to the preset threshold, the mobile terminal outputs a second return value to call the second audio parameter, and then executes step 209.

Wherein, the second return value and the second audio parameter can be set according to the requirements of practical applications, which will not be repeated here.

For example, if the mobile terminal is not placed on the desktop, but is held by the user, and the speaker playback port is not blocked, then the distance sensor can be used to obtain the distance between the back of the mobile terminal and the blocking object, and determine that the distance is greater than or equal to The threshold is preset. Therefore, output a second return value, for example, 1 may be output to call a second audio parameter, such as call audio parameter 2, and then perform step 209 .

209. The mobile terminal acquires a corresponding second echo cancellation algorithm according to the second audio parameter, and uses the second echo cancellation algorithm to process the echo.

For example, an echo signal may be obtained, and then the second echo cancellation algorithm is used to generate a suppression signal whose waveform is opposite to the echo signal, and then the suppression signal is used to cancel the echo signal, and so on.

Wherein, the second echo cancellation algorithm can be set according to actual application requirements, and the strength of the second echo cancellation algorithm to suppress echo is smaller than that of the first echo cancellation algorithm; The information will be reflected by the occluding object, so that more echo signals enter the microphone, resulting in a hands-free echo, and if the distance to the occluding object is closer, for example, the mobile terminal is placed flat on the table, the echo will be greater. Therefore, The stronger the echo cancellation algorithm needs to be used to suppress the echo, on the contrary, the farther the distance from the blocking object is, the smaller the echo will be. Therefore, a weaker echo cancellation algorithm can be used to suppress the echo.

As can be seen from the above, in this embodiment, when it is determined that the mobile terminal enters the hands-free call, the speaker of the mobile terminal can be activated, and the distance between the playback port of the speaker and the blocking object in front of the playback port of the speaker can be monitored. If the distance is less than the preset threshold, then Use the first echo cancellation algorithm with strong echo suppression strength to process the echo, otherwise, if the distance is greater than or equal to the preset threshold, use the second echo cancellation algorithm with weak echo suppression strength to process the echo; the scheme can be based on The specific state of the mobile terminal flexibly selects the way of processing the echo, so as to better eliminate the echo. Therefore, the effect of suppressing the echo can be improved, and the call quality can be greatly improved.

Embodiment three,

In order to better implement the above method, an embodiment of the present invention also provides a voice signal processing device. As shown in FIG. The second processing unit 304 is as follows:

(1) start unit 301;

The starting unit 301 is configured to start a speaker of the mobile terminal to play a voice signal when it is determined that the mobile terminal enters into a hands-free call.

For example, the starting unit 301 may be configured to call a speaker process when it is determined that the terminal enters a hands-free call, execute the speaker process to start the speaker, and play a voice signal through the speaker.

Wherein, before it is determined that the mobile terminal enters the hands-free call, the starting unit 301 can also be used to acquire a voice signal.

(2) monitoring unit 302;

The monitoring unit 302 is configured to monitor the distance between the playback port of the speaker and the blocking object in front of the playback port of the speaker.

For example, the monitoring unit 302 can be specifically configured to monitor the distance between the playback port of the speaker and the blocking object in front of the playback port of the speaker through a distance sensor.

For example, if the playback port of the speaker is located at the back of the mobile terminal, the distance sensor can be installed on the back of the mobile terminal, then at this time:

The monitoring unit 302 can specifically be used to determine whether the back of the mobile terminal faces the blocking object, and if the back faces the blocking object, obtain the distance between the back and the blocking object through the distance sensor.

Otherwise, if the back side is not facing the blocking object, it can be considered that the distance between the back side and the blocking object is far enough, and therefore, the monitoring unit 302 does not need to acquire the distance between the back side and the blocking object.

For another example, if the speaker playback port is located on the front of the mobile terminal, the distance sensor can be installed on the front of the mobile terminal, then at this time:

The monitoring unit 302 may be specifically configured to determine whether the mobile terminal is facing the blocking object, and if the mobile terminal is facing the blocking object, obtain the distance between the front and the blocking object through a distance sensor.

Otherwise, if the front is not facing the blocking object, it can be considered that the distance between the front and the blocking object is far enough, and therefore, the monitoring unit 302 does not need to acquire the distance between the front and the blocking object.

(3) The first processing unit 303;

The first processing unit 303 is configured to use a first echo cancellation algorithm to process the echo when the monitoring unit 302 determines that the distance is less than a preset threshold.

For example, the first processing unit 303 can be specifically configured to output a first return value when the monitoring unit 302 determines that the distance is less than a preset threshold, so as to call the first audio parameter, and obtain the corresponding first echo according to the first audio parameter canceling algorithm, and use the first echo canceling algorithm to process the echo.

Wherein, the first return value, the first audio parameter and the first echo cancellation algorithm can be set according to the actual application requirements, for example, the first return value can be set to 0, the first audio parameter can be set to 1, etc., I won't repeat them here.

Different audio parameters may correspond to different echo cancellation algorithms, and the mapping relationship between audio parameters and echo cancellation algorithms may be preset in the voice information processing device, which will not be repeated here.

(4) The second processing unit 304;

The second processing unit 304 is configured to use the second echo cancellation algorithm to process the echo when the monitoring unit 302 determines that the distance is greater than or equal to the preset threshold, wherein the strength of the first echo cancellation algorithm to suppress the echo is greater than that of the second echo cancellation algorithm .

For example, the second processing unit 304 can specifically be configured to output a second return value when the monitoring unit 302 determines that the distance is not less than (that is, greater than or equal to) a preset threshold, so as to call the second audio parameter, and according to the second audio parameter A corresponding second echo cancellation algorithm is obtained, and the echo is processed by using the second echo cancellation algorithm.

Wherein, the second return value, the second audio parameter and the second echo cancellation algorithm can be set according to actual application requirements, for example, corresponding to setting the first return value to 0 and setting the first audio parameter to 1 , the second return value can be set to 1, the second audio parameter can be set to 2, etc., which will not be repeated here.

Wherein, the preset threshold can be set according to actual application requirements, for example, it can be fixedly set in the mobile terminal by the system in advance, or can be set by the user himself, that is, as shown in Figure 3b, the voice signal processing device can also A setting unit 305 may be included as follows:

The setting unit 305 is configured to receive a setting request, and set the threshold according to the setting request.

During specific implementation, each of the above units may be implemented as an independent entity, or may be combined arbitrarily as the same or several entities. The specific implementation of each of the above units may refer to the previous method embodiments, and will not be repeated here.

The voice signal processing apparatus may specifically be integrated into devices such as a mobile terminal, and the mobile terminal may include devices such as a mobile phone or a tablet computer.

As can be seen from the above, when the voice signal processing device of this embodiment determines that the mobile terminal enters the hands-free call, the starting unit 301 can start the speaker of the mobile terminal, and the monitoring unit 302 can monitor the playback port of the speaker and the object in front of the playback port of the speaker. If the distance is less than the preset threshold, the first processing unit 303 will use the first echo cancellation algorithm with strong echo suppression strength to process the echo; otherwise, if the distance is greater than or equal to the preset threshold, the echo will be processed by The second processing unit 304 processes the echo by using the second echo cancellation algorithm that suppresses the weak echo intensity; this solution can flexibly select the mode of processing the echo according to the specific state of the mobile terminal, so as to better cancel the echo, therefore, can Improve the echo suppression effect and greatly improve the call quality.

Those of ordinary skill in the art can understand that all or part of the steps in the various methods of the above-mentioned embodiments can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium, and the storage medium can include: Read Only Memory (ROM, Read Only Memory), Random Access Memory (RAM, Random Access Memory), disk or CD, etc.

The method and device for processing a voice signal provided by the embodiment of the present invention have been described in detail above. In this paper, specific examples are used to illustrate the principle and implementation of the present invention. The description of the above embodiment is only used to help understanding The method of the present invention and its core idea; at the same time, for those skilled in the art, according to the idea of the present invention, there will be changes in the specific implementation and scope of application. In summary, the content of this specification should not be understood To limit the present invention.

Claims (9)

1. A kind of 1. processing method of voice signal, it is characterised in that including：

   Obtain voice signal, when determining that mobile terminal enters hand-free call, start the loudspeaker of mobile terminal to play predicate Sound signal；

   Mouth is played to loudspeaker by range sensor and is monitored with blocking the distance of object in front of loudspeaker broadcasting mouth；It is described Range sensor is that the range sensor set up the position of mouth on the mobile terminal is played according to the loudspeaker；When described When loudspeaker broadcasting mouth is located at the back side of the mobile terminal, the range sensor is set up at the back side of the mobile terminal, The monitoring includes：Determine whether the back side is towards object is blocked for the mobile terminal, if the back side passes through institute towards object is blocked Range sensor is stated to obtain the back side and block the distance of object；It is located at the mobile terminal when the loudspeaker plays mouth When positive, the range sensor is set up to be included in the front of the mobile terminal, the monitoring：Determining the mobile terminal is It is no just facing to shelter body, if just facing to shelter body, the front is obtained with blocking object by range sensor Distance；

   If the distance is less than preset threshold value, echo is handled using the first echo cancellation algorithm；Including：Obtain echo Signal, the suppression signal opposite with the echo signal waveform is generated using first echo cancellation algorithm, utilizes the suppression Signal processed offsets the echo signal；

   If the distance is more than or equal to preset threshold value, echo is handled using the second echo cancellation algorithm；Including：Obtain Echo signal, the suppression signal opposite with the echo signal waveform is generated using second echo cancellation algorithm, utilizes institute State and suppress signal to offset the echo signal, the intensity that first echo cancellation algorithm suppresses echo disappears more than the second echo Except algorithm.
2. 2. according to the method for claim 1, it is characterised in that if the distance is less than preset threshold value, utilize the One echo cancellation algorithm is handled echo, including：

   If the distance is less than preset threshold value, the first return value is exported, to call the first audio frequency parameter；

   Corresponding first echo cancellation algorithm is obtained according to first audio frequency parameter；

   Echo is handled using first echo cancellation algorithm.
3. 3. according to the method for claim 1, it is characterised in that if the distance is more than or equal to preset threshold value, profit Echo is handled with the second echo cancellation algorithm, including：

   If the distance is more than or equal to preset threshold value, the second return value is exported, to call the second audio frequency parameter；

   Corresponding second echo cancellation algorithm is obtained according to second audio frequency parameter；

   Echo is handled using second echo cancellation algorithm.
4. 4. according to the method described in any one of claims 1 to 3, it is characterised in that also include：

   Receive and request is set；

   Request is set to be configured the threshold value according to described.
5. A kind of 5. processing unit of voice signal, it is characterised in that including：

   Start unit, for obtaining voice signal, when determining that mobile terminal enters hand-free call, start the loudspeaker of mobile terminal To play the voice signal；

   Monitoring unit, the distance for blocking object in mouth front is played with loudspeaker for playing mouth to loudspeaker by range sensor It is monitored；The range sensor is that the distance set up the position of mouth on the mobile terminal is played according to the loudspeaker Sensor；When the loudspeaker, which plays mouth, is located at the back side of the mobile terminal, the range sensor is set up in the shifting The back side of dynamic terminal, the monitoring unit are specifically used for, and determine whether the back side is towards object is blocked for the mobile terminal, if the back side Towards object is blocked, then the back side is obtained by the range sensor and block the distance of object；When the loudspeaker is broadcast When putting mouth and being located at the front of the mobile terminal, the range sensor is set up in the front of the mobile terminal, the monitoring Unit is specifically used for, and whether determines the mobile terminal just facing to shelter body, if just facing to shelter body, by away from The front is obtained with blocking with a distance from object from sensor；

   First processing units, for when monitoring unit determines that the distance is less than preset threshold value, being calculated using the first echo cancellation Method is handled echo；Including：Echo signal is obtained, utilizes first echo cancellation algorithm generation and the echo signal The opposite suppression signal of waveform, the echo signal is offset using the suppression signal；

   Second processing unit, for when monitoring unit determines that the distance is more than or equal to preset threshold value, being disappeared using the second echo Except algorithm is handled echo；Including：Echo signal is obtained, utilizes second echo cancellation algorithm generation and the echo The opposite suppression signal of signal waveform, the echo signal is offset using the suppression signal, first echo cancellation is calculated The intensity that method suppresses echo is more than the second echo cancellation algorithm.
6. 6. device according to claim 5, it is characterised in that the first processing units, be specifically used for：

   If the distance is less than preset threshold value, the first return value is exported, to call the first audio frequency parameter；

   Corresponding first echo cancellation algorithm is obtained according to first audio frequency parameter；

   Echo is handled using first echo cancellation algorithm.
7. 7. device according to claim 5, it is characterised in that the second processing unit, be specifically used for：

   If the distance is more than or equal to preset threshold value, the second return value is exported, to call the second audio frequency parameter；

   Corresponding second echo cancellation algorithm is obtained according to second audio frequency parameter；

   Echo is handled using second echo cancellation algorithm.
8. 8. according to the device described in any one of claim 5 to 7, it is characterised in that also including setting unit；

   Setting unit, request is set for receiving, sets request to be configured the threshold value according to described.
9. 9. a kind of computer-readable recording medium, it is stored with computer program, wherein, the computer program causes computer Perform the method as described in Claims 1-4 any one.