CN105187594B - A kind of method and apparatus for eliminating echo - Google Patents
A kind of method and apparatus for eliminating echo Download PDFInfo
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- CN105187594B CN105187594B CN201510450913.8A CN201510450913A CN105187594B CN 105187594 B CN105187594 B CN 105187594B CN 201510450913 A CN201510450913 A CN 201510450913A CN 105187594 B CN105187594 B CN 105187594B
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Abstract
The present invention relates to a kind of method and apparatus for eliminating echo, belong to field of computer technology.The method includes：Preset first voice signal is played by local loud speaker, and determines the frequency response of each Frequency point in the first voice signal that local microphone detects；The frequency response of each Frequency point, determines corresponding parameter value to be used in the first voice signal detected according to the correspondence and the local microphone of the frequency response of pre-stored each Frequency point and the parameter value of echo cancellation parameters；During locally carrying out voice communication, according to the parameter value to be used and preset echo cancellation algorithm, to the voice communication during the voice signal that detects of local microphone carry out echo cancellation process.Using the present invention, the quality of call can be improved.
Description
Technical field
The present invention relates to field of computer technology, especially with respect to a kind of method and apparatus for eliminating echo.
Background technology
With the development of mobile terminal technology, the application of mobile terminal also comes more extensive, and function is also stronger and stronger.It is mobile
Loud speaker and microphone are usually provided in terminal, wherein microphone is typically provided with sealing structure, to prevent the sound of loud speaker
Sound is passed in microphone and echogenicity.
In practice, due to production assembly is bad etc., it may appear that the sealing structure of the microphone of mobile terminal it is close
The poor situation of envelope property, the sound that loud speaker plays can be passed in microphone, in this way, user uses the mobile terminal and other use
When family is conversed, other side can hear the echo of himself.Therefore, echo cancellor calculation can be arranged in technical staff in the terminal
Method, to eliminate the echo during passing through.When eliminating echo, if the dynamics for eliminating echo is excessive, other side can be not only eliminated
Echo, the call sound of script can also be eliminated, so, microphone when technical staff would generally dispatch from the factory according to mobile terminal
The sealing situation of sealing structure, the echo cancellor formula in echo cancellation algorithm is arranged, reasonably to eliminate echo.
In the implementation of the present invention, inventor has found to have at least the following problems：
User is during using mobile terminal, it may appear that the case where mobile terminal is dropped can lead to microphone in this way
Sealing structure destroyed, the echo generated in mobile terminal also will increase, in this way, pre-set echo cancellation algorithm will
Echo can not be eliminated, speech quality can be caused poor in this way.
Invention content
In order to overcome the problems, such as present in the relevant technologies, the present invention provides a kind of method and apparatus for eliminating echo.Institute
It is as follows to state technical solution：
According to a first aspect of the embodiments of the present invention, a kind of method for eliminating echo is provided, the method includes：
Preset first voice signal is played by local loud speaker, and determines the first voice that local microphone detects
The frequency response of each Frequency point in signal；
According to the correspondence of the frequency response of pre-stored each Frequency point and the parameter value of echo cancellation parameters, and
The frequency response of each Frequency point, determines corresponding parameter value to be used in the first voice signal that the local microphone detects；
During locally carrying out voice communication, according to the parameter value to be used and preset echo cancellation algorithm,
The voice signal that local microphone detects during to the voice communication carries out echo cancellation process.
Optionally, the frequency response according to pre-stored each Frequency point is corresponding with the parameter value of echo cancellation parameters
The frequency response of each Frequency point in the first voice signal that relationship and the local microphone detect determines and corresponding waits making
With parameter value, including：
It is closed according to the default Hz-KHz of pre-stored each Frequency point is corresponding with the parameter value of echo cancellation parameters
Default frequency response model in the first voice signal that system and the local microphone detect belonging to the frequency response of each Frequency point
It encloses, determines corresponding parameter value to be used.
Optionally, the frequency response according to pre-stored each Frequency point is corresponding with the parameter value of echo cancellation parameters
The frequency response of each Frequency point in the first voice signal that relationship and the local microphone detect determines and corresponding waits making
With parameter value, including：
Determine the frequency response of each Frequency point and respective frequencies point in the first voice signal that the local microphone detects
Preset reference frequency response difference, and determine the maximum difference in the difference；
According to the correspondence of pre-stored maximum difference and the parameter value of echo cancellation parameters, and determine most
Big difference determines corresponding parameter value to be used.
Optionally, the method further includes：
Preset second voice signal is played by local loud speaker, obtains the second voice letter that local microphone detects
The signal strength values of target frequency point in number, if the signal strength values of target frequency point are less than preset signal strength threshold
Value increases local Mike then according to the difference of the preset signal strength threshold value and the signal strength values of the target frequency point
The gain of wind.
Optionally, described that preset first voice signal is played by local loud speaker, and determine local microphone detection
To the first voice signal in each Frequency point frequency response, including：
When detect the variation of acceleration of itself meet it is preset drop condition when, show echo cancellor option；
When detecting the echo cancellor instruction triggered by the echo cancellor option, played by local loud speaker pre-
If the first voice signal, and determine the frequency response of each Frequency point in the first voice signal for detecting of local microphone.
According to a second aspect of the embodiments of the present invention, a kind of device for eliminating echo is provided, described device includes：
First determining module for playing preset first voice signal by local loud speaker, and determines local Mike
The frequency response of each Frequency point in the first voice signal that wind detects；
Second determining module is used for the parameter value of the frequency response and echo cancellation parameters according to pre-stored each Frequency point
Correspondence and the first voice signal for detecting of the local microphone in each Frequency point frequency response, determine and correspond to
Parameter value to be used；
Processing module, for during locally carrying out voice communication, according to the parameter value to be used and preset
Echo cancellation algorithm, to the voice communication during the voice signal that detects of local microphone carry out at echo cancellor
Reason.
Optionally, second determining module, is used for：
It is closed according to the default Hz-KHz of pre-stored each Frequency point is corresponding with the parameter value of echo cancellation parameters
Default frequency response model in the first voice signal that system and the local microphone detect belonging to the frequency response of each Frequency point
It encloses, determines corresponding parameter value to be used.
Optionally, second determining module, including：
First determination sub-module, for determining each Frequency point in the first voice signal that the local microphone detects
Frequency response and respective frequencies point preset reference frequency response difference, and determine the maximum difference in the difference；
Second determination sub-module, for corresponding with the parameter value of echo cancellation parameters according to pre-stored maximum difference
Relationship, and the maximum difference determined, determine corresponding parameter value to be used.
Optionally, described device further includes increasing module, is used for：
Preset second voice signal is played by local loud speaker, obtains the second voice letter that local microphone detects
The signal strength values of target frequency point in number, if the signal strength values of target frequency point are less than preset signal strength threshold
Value increases local Mike then according to the difference of the preset signal strength threshold value and the signal strength values of the target frequency point
The gain of wind.
Optionally, first determining module, including：
Display sub-module, for when detect the variation of acceleration of itself meet it is preset drop condition when, show back
Sound eliminates option；
Third determination sub-module, for when detecting the echo cancellor triggered by the echo cancellor option instruction,
Preset first voice signal is played by local loud speaker, and is determined every in the first voice signal that local microphone detects
The frequency response of a Frequency point.
According to a third aspect of the embodiments of the present invention, a kind of device for eliminating echo is provided, including：
Processor；
Memory for storing processor-executable instruction；
Wherein, the processor is configured as：
Preset first voice signal is played by local loud speaker, and determines the first voice that local microphone detects
The frequency response of each Frequency point in signal；
According to the correspondence of the frequency response of pre-stored each Frequency point and the parameter value of echo cancellation parameters, Yi Jisuo
The frequency response for stating each Frequency point in the first voice signal that local microphone detects, determines corresponding parameter value to be used；
During locally carrying out voice communication, according to the parameter value to be used and preset echo cancellation algorithm,
The voice signal that local microphone detects during to the voice communication carries out echo cancellation process.
The technical solution that the embodiment of the present invention provides can include the following benefits：
In the embodiment of the present invention, preset first voice signal is played by local loud speaker, and determine local microphone
The frequency response of each Frequency point, disappears according to the frequency response of pre-stored each Frequency point with echo in the first voice signal detected
The frequency of each Frequency point in the first voice signal detected except the correspondence and local microphone of the parameter value of parameter
It rings, determines corresponding parameter value to be used, during locally carrying out voice communication, according to parameter value to be used and preset
Echo cancellation algorithm, to voice communication during the voice signal that detects of local microphone carry out echo cancellation process, this
Sample, terminal are dropped, and after causing the sealing structure of microphone to be destroyed, the echo generated in terminal will increase, and terminal can
With the first voice signal detected according to local microphone, chooses suitable parameter value to be used and carries out echo cancellation process,
The case where can not eliminating echo can be avoided the occurrence of, so as to improve speech quality.
It should be understood that above general description and following detailed description is only exemplary and explanatory, not
It can the limitation present invention.
Description of the drawings
The drawings herein are incorporated into the specification and forms part of this specification, and shows the implementation for meeting the present invention
Example, and be used to explain the principle of the present invention together with specification.In the accompanying drawings：
Fig. 1 is a kind of flow chart of the method for elimination echo shown according to an exemplary embodiment；
Fig. 2 is a kind of structural schematic diagram of terminal shown according to an exemplary embodiment；
Fig. 3 is a kind of schematic diagram of the device of elimination echo shown according to an exemplary embodiment；
Fig. 4 is a kind of schematic diagram of the device of elimination echo shown according to an exemplary embodiment；
Fig. 5 is a kind of schematic diagram of the device of elimination echo shown according to an exemplary embodiment；
Fig. 6 is a kind of schematic diagram of the device of elimination echo shown according to an exemplary embodiment；
Fig. 7 is a kind of structural schematic diagram of terminal shown according to an exemplary embodiment.
Through the above attached drawings, it has been shown that the specific embodiment of the present invention will be hereinafter described in more detail.These attached drawings
It is not intended to limit the scope of the inventive concept in any manner with verbal description, but is by referring to specific embodiments
Those skilled in the art illustrate idea of the invention.
Specific implementation mode
Example embodiments are described in detail here, and the example is illustrated in the accompanying drawings.Following description is related to
When attached drawing, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements.Following exemplary embodiment
Described in embodiment do not represent and the consistent all embodiments of the present invention.On the contrary, they be only with it is such as appended
The example of the consistent device and method of some aspects being described in detail in claims, of the invention.
An exemplary embodiment of the invention provides a kind of method for eliminating echo, as shown in Figure 1, the processing stream of this method
Journey may include following step：
In a step 101, preset first voice signal is played by local loud speaker, and determines local microphone detection
To the first voice signal in each Frequency point frequency response.
In a step 102, according to pair of the frequency response of pre-stored each Frequency point and the parameter value of echo cancellation parameters
Should be related to and the first voice signal that local microphone detects in each Frequency point frequency response, determine corresponding to be used
Parameter value.
In step 103, during locally carrying out voice communication, disappeared according to parameter value to be used and preset echo
Except algorithm, to voice communication during the voice signal that detects of local microphone carry out echo cancellation process.
In the embodiment of the present invention, preset first voice signal is played by local loud speaker, and determine local microphone
The frequency response of each Frequency point, disappears according to the frequency response of pre-stored each Frequency point with echo in the first voice signal detected
The frequency of each Frequency point in the first voice signal detected except the correspondence and local microphone of the parameter value of parameter
It rings, determines corresponding parameter value to be used, during locally carrying out voice communication, according to parameter value to be used and preset
Echo cancellation algorithm, to voice communication during the voice signal that detects of local microphone carry out echo cancellation process, this
Sample, terminal are dropped, and after causing the sealing structure of microphone to be destroyed, the echo generated in terminal will increase, and terminal can
With the first voice signal detected according to local microphone, chooses suitable parameter value to be used and carries out echo cancellation process,
The case where can not eliminating echo can be avoided the occurrence of, so as to improve speech quality.
Another exemplary embodiment of the present invention provides a kind of method for eliminating echo, and this method can be used in terminal,
Wherein, terminal can be the terminal for having function of voice communication, such as mobile phone or tablet computer mobile terminal.The terminal can be with
Including loud speaker, for the loud speaker for playing voice signal, the voice signal can be preset first voice signal；Institute
It may include microphone to state terminal, and the microphone is used to detect the voice signal that the loud speaker plays, and can will detect
The transmitting voice signal arrived is to processor；The terminal may include processor, and the processor is determined for local wheat
The frequency response of each Frequency point in the first voice signal that gram wind detects, according to the frequency response of pre-stored each Frequency point with return
Each Frequency point in the first voice signal that sound eliminates the correspondence of the parameter value of parameter and local microphone detects
Frequency response determines corresponding parameter value to be used, and during locally carrying out voice communication, the processor can be according to waiting making
With parameter value and preset echo cancellation algorithm, to voice communication during the voice signal that detects of local microphone carry out
Echo cancellation process；The terminal may include input unit, and the input unit can be button, can be touch screen, use
Family can open the application program with echo cancellation performance by input unit；The terminal may include display unit, institute
It can be liquid crystal display to state display unit, and display unit can show echo cancellor option.In addition, the terminal can also wrap
Include the portions such as memory, sensor, voicefrequency circuit, bluetooth, WiFi (Wirelessfidelity, adopting wireless fidelity technology) and power supply
Part.
Below in conjunction with embodiment, process flow shown in FIG. 1 is described in detail, content can be as follows：
In a step 101, preset first voice signal is played by local loud speaker, and determines local microphone detection
To the first voice signal in each Frequency point frequency response.
In force, user can install the application program that have the function of eliminating echo in terminal, as desired couple of user
When terminal carries out elimination echo, user can click the icon of the application program, and terminal can then receive the corresponding application program
Icon click commands, then can open the application program, show the homepage of the application program.User can be at this
In the homepage of application program, echo cancellor option is clicked, terminal can then detect the click commands of corresponding echo cancellor option,
It may then pass through local loud speaker and play preset first voice signal, the first voice signal can be swept-frequency signal, frequency sweep
The frequency range of signal can be from low to high, if the frequency range of swept-frequency signal is 300~10K.Swept-frequency signal can be with
For octave signal, said frequencies point can be the Frequency point in octave signal.
Wherein, octave can be that frequency doubles spectrum space occupied by frequency spectrum, for different initial frequency points
Frequency multiplication occupied by spectrum space be different, such as initial frequency point is 100HZ, then an octave be exactly from
100HZ~200HZ, if starting dot frequency is 200HZ, an octave is exactly from 200HZ~400HZ, if starting point
Frequency is 400HZ, then an octave is exactly from 400HZ~800HZ ....1/N octave signals are i.e. at one
12 frequency points are arranged in octave, between each between be divided into 1/12 octave, specific calculation can be as follows：
Such as：From 100HZ~200HZ, and frequency interval is 1/12 octave, if first Frequency point is 1/12=
Lgx/lg2, lgx=0.3010 × 1/12=0.025, x=1.055, the corresponding frequency of first Frequency point are 100HZ*1.055
=105.5HZ.For second Frequency point 2/12=lgx/lg2, lgx=0.3010 × 2/12=0.0501, x=1.122,
The corresponding frequency of two Frequency points is 100HZ*1.122=112.2HZ, and so on.
After terminal plays preset first voice signal by local loud speaker, local microphone can detect the first language
Sound signal, local microphone can be by the first transmitting voice signals detected to the processor of terminal, and the processor of terminal is then
It can determine the frequency response of each Frequency point in the first voice signal that local microphone detects.Wherein, frequency response is referred to as
Frequency response, for indicate the first voice signal the Frequency point signal magnitude.
In addition, the application program can be when reaching predetermined period, the prompt message that elimination echo is pushed to user (such as exists
PUSH message is shown in notification bar), it, can be by clicking prompt letter after user receives the prompt message of the elimination echo
Breath, or the icon for the application program for eliminating echo is clicked, to open the application program for eliminating echo, then carry out elimination echo
Operation.
Optionally, the trigger condition for eliminating echo can be set, correspondingly, the processing procedure of step 101 can be as follows：When
It is preset when dropping condition to detect that the variation of the acceleration of itself meets, shows echo cancellor option；When detect by return
When sound eliminates the echo cancellor instruction of option triggering, preset first voice signal is played by local loud speaker, and determine this
The frequency response of each Frequency point in the first voice signal that ground microphone detects.
In force, the sensor for detecting self-acceleration can be provided in terminal, it is whole such as acceleration induction device
The condition of dropping can also be pre-set in end, i.e. the acceleration of terminal is first acceleration of gravity, keeps the side of becoming after a period of time
To acceleration straight up, then become 0 in preset duration.Terminal can detect the acceleration of itself in real time, work as detection
To the acceleration of itself variation meet it is preset drop condition when, can be shown in the prompting frame with display the prompt box
Echo cancellor option, i.e., after terminal is dropped, can show include echo cancellor option prompting frame, user sees that this is carried
After showing frame, the echo cancellor option in the prompting frame can be clicked, terminal can then receive the click of corresponding echo cancellor option
Instruction (i.e. echo cancellor instructs) may then pass through local loud speaker and play preset first voice signal, and determines local
The frequency response of each Frequency point in the first voice signal that microphone detects.
In a step 102, according to pair of the frequency response of pre-stored each Frequency point and the parameter value of echo cancellation parameters
Should be related to and the first voice signal that local microphone detects in each Frequency point frequency response, determine corresponding to be used
Parameter value.
In force, echo cancellation algorithm can be previously stored in terminal, echo cancellation algorithm may be used existing
Echo cancellation algorithm can include several echo cancellation parameters in echo cancellation algorithm, as linear echo eliminates filter
Length, linear echo eliminate dynamics and nonlinear echo elimination dynamics etc..Terminal eliminates the dynamics and echo cancellation parameters of echo
Parameter value it is related.For example, when the dynamics for eliminating echo is weaker, the length that linear echo eliminates filter is 5, and linear echo disappears
Except dynamics is 10, it is 15 that nonlinear echo, which eliminates dynamics,；When the dynamics of elimination echo is stronger, linear echo eliminates the length of filter
Degree is 10, and it is 15 that linear echo, which eliminates dynamics, and it is 20 that nonlinear echo, which eliminates dynamics,.Corresponding to a certain elimination echo dynamics
Echo cancellation parameters parameter value, be properly termed as the set of parameter value of echo cancellation parameters, can be prestored in terminal more
Kind eliminates the parameter value of the corresponding echo cancellation parameters of echo dynamics, i.e. storing multiple sets parameter value, to be suitable for local microphone
Different sealing situations.
Terminal can judge the power for needing to eliminate echo according to the frequency response for detecting each Frequency point in the first voice signal
Degree determines the parameter value to be used of echo cancellation parameters.It can be with the frequency response of storing frequencies point and echo cancellation parameters in terminal
Parameter value correspondence, then can be according to the parameter of the frequency response and echo cancellation parameters of pre-stored each Frequency point
The frequency response of each Frequency point, determines corresponding in the first voice signal that the correspondence and local microphone of value detect
Parameter value to be used.Determine that the mode of parameter value to be used can be diversified, following present two kinds of feasible modes.
Mode one：According to the default Hz-KHz of pre-stored each Frequency point and the parameter value of echo cancellation parameters
Default frequency response in the first voice signal that correspondence and local microphone detect belonging to the frequency response of each Frequency point
Range determines corresponding parameter value to be used.
In force, if the sealing situation of local Mike is different, the first voice signal that local Mike detects
Frequency response is also different.For example, when the sealing situation of local microphone is preferable, in the first voice signal that local Mike detects,
The frequency response of Frequency point a is -40dB, and the frequency response of Frequency point b is -20dB, and the frequency response of Frequency point c is -45dB, when local microphone
When sealing situation is poor, in the first voice signal that local Mike detects, the frequency response of Frequency point a is -45dB, Frequency point b's
Frequency response is -27dB, and the frequency response of Frequency point c is -50dB.For arbitrary a set of parameter value, there can be its applicable echo cancellor model
It encloses, i.e., each Frequency point, which corresponds to every suit parameter value, can be arranged corresponding Hz-KHz (i.e. default Hz-KHz).For example, right
In first set parameter value, the default Hz-KHz of Frequency point a is -25dB~-35dB, the default Hz-KHz of Frequency point b is -
The default Hz-KHz of 30dB~-40dB, Frequency point c are -55dB~-60dB；For second set of parameter value, Frequency point a's is pre-
If Hz-KHz is -35dB~-45dB, the default Hz-KHz of Frequency point b is -40dB~-50dB, the default frequency of Frequency point c
Ring ranging from -60dB~-70dB.
Terminal determines in the first voice signal that local microphone detects after the frequency response of each Frequency point, it can be determined that every
Default Hz-KHz belonging to the frequency response of a Frequency point, and then can be according to the default frequency response model of pre-stored each Frequency point
Enclose each frequency in the first voice signal detected with the correspondence of the parameter value of echo cancellation parameters and local microphone
Default Hz-KHz belonging to the frequency response of rate point determines corresponding parameter value to be used.For example, terminal detects Frequency point a's
Frequency response is -27dB, and the frequency response of Frequency point b is -32dB, and the frequency response of Frequency point c is -58dB, then can determine corresponding to be used
Parameter value is first set parameter value.
In addition, in the first voice signal that local microphone detects, the default Hz-KHz belonging to the frequency response of Frequency point
More set parameter values may be corresponded to, at this moment, terminal, which can determine, often covers the number that parameter value corresponds to Frequency point, by corresponding frequency
That the largest number of set parameter value of rate point are as parameter value to be used.For example, terminal detect Frequency point a frequency response be-
The frequency response of 27dB, Frequency point b are -45dB, and the frequency response of Frequency point c is -68dB, then can determine that corresponding parameter value to be used is
Second set of parameter value.Terminal can also determine that often set parameter value corresponds to a of higher frequency point (Frequency point of such as 3K or more)
Number, using that the largest number of set parameter value of corresponding higher frequency point as parameter value to be used.
Mode two：Determine the frequency response of each Frequency point and respective frequencies in the first voice signal that local microphone detects
The difference of the preset reference frequency response of point, and determine the maximum difference in difference；Disappeared with echo according to pre-stored maximum difference
Except the correspondence of the parameter value of parameter, and the maximum difference determined, determine corresponding parameter value to be used.
In force, the corresponding preset reference frequency response of each Frequency point can be pre-set in terminal, technical staff can be with
Preset first voice signal is played by the local loud speaker of terminal when terminal is dispatched from the factory, terminal can then determine local Mike
The frequency response of each Frequency point, terminal can carry out multiple frequency response detection process, will detect in the first voice signal that wind detects
The average value of the frequency response of obtained each Frequency point is as the corresponding preset reference frequency response of each Frequency point.
Terminal determines in the first voice signal that local microphone detects after the frequency response of each Frequency point, can use each
The corresponding preset reference frequency response of Frequency point subtracts the frequency response of each Frequency point, obtains frequency response and the respective frequencies point of each Frequency point
Preset reference frequency response difference, then can determine the maximum difference in these differences.Maximum can be prestored in terminal
The correspondence of the parameter value of difference and echo cancellation parameters can store the often corresponding difference range of set parameter value in terminal,
And may determine that the difference range belonging to the maximum difference being calculated, it then can determine that the corresponding echo of the difference range disappears
Except the parameter value of parameter, parameter value to be used is obtained.For example, the corresponding difference range of first set parameter value is 0dB~5dB, the
The corresponding difference range of two sets of parameter values is 6dB~10dB, and it is 11dB~15dB that third, which covers the corresponding difference range of parameter value, eventually
The maximum difference that end calculates is 7dB, then can determine that second set of parameter value is parameter value to be used.
In step 103, during locally carrying out voice communication, disappeared according to parameter value to be used and preset echo
Except algorithm, to voice communication during the voice signal that detects of local microphone carry out echo cancellation process.
In force, user is during using terminal, it is possible that the case where mobile terminal is dropped, can lead in this way
The sealing structure of microphone is caused to be destroyed, the voice signal that loud speaker plays can be then passed to from terminal inner in microphone,
To echogenicity, as shown in Figure 2.Terminal can bring the parameter value to be used determined into preset echo cancellation algorithm
In, during locally carrying out voice communication, terminal can be right according to parameter value to be used and preset echo cancellation algorithm
The voice signal that local microphone detects during voice communication carries out echo cancellation process.
Optionally, terminal can be adjusted the signal strength of voice signal, and corresponding processing procedure can be as follows：It is logical
It crosses local loud speaker and plays preset second voice signal, obtain target frequency in the second voice signal that local microphone detects
The signal strength values of rate point, if the signal strength values of target frequency point are less than preset signal strength threshold value, according to default letter
The difference of number intensity threshold and the signal strength values of target frequency point, increases the gain of local microphone.
In force, terminal can play preset second voice signal by local loud speaker, the second voice signal
Can include target frequency point in Frequency point, target frequency point can be the Frequency point that frequency is 1K.Second voice signal can be with
It is identical as the first voice, it can also be different from the first voice signal.Terminal plays preset second voice by local loud speaker
After signal, the second voice signal that local microphone can then detect, terminal can obtain second that local microphone detects
The signal strength values of target frequency point in voice signal, the signal strength values can be the level value of target frequency point.Terminal can
To judge whether the signal strength values of the target frequency point detected are less than preset signal strength threshold value, if target frequency point
Signal strength values are less than preset signal strength threshold value, then terminal can calculate the letter of preset signal strength threshold value and target frequency point
The gain of local microphone, then can be increased the difference decibel by the difference of number intensity value.For example, predetermined level threshold value
Current gain for -25dB, local microphone is 10dB, and the level value of target frequency point is -30dB, then can determine that difference is
Then the Gain tuning of local microphone can be 15dB by 5dB.After terminal increases the gain of local microphone, it can pass through
Local loud speaker plays preset first voice signal, and determines each frequency in the first voice signal that local microphone detects
The frequency response of rate point, and then the parameter value to be used of each echo cancellation parameters can be determined by above-mentioned processing, locally carrying out language
During sound communicates, to voice communication during the voice signal that detects of local microphone carry out echo cancellation process.
In the embodiment of the present invention, preset first voice signal is played by local loud speaker, and determine local microphone
The frequency response of each Frequency point, disappears according to the frequency response of pre-stored each Frequency point with echo in the first voice signal detected
The frequency of each Frequency point in the first voice signal detected except the correspondence and local microphone of the parameter value of parameter
It rings, determines corresponding parameter value to be used, during locally carrying out voice communication, according to parameter value to be used and preset
Echo cancellation algorithm, to voice communication during the voice signal that detects of local microphone carry out echo cancellation process, this
Sample, terminal are dropped, and after causing the sealing structure of microphone to be destroyed, the echo generated in terminal will increase, and terminal can
With the first voice signal detected according to local microphone, chooses suitable parameter value to be used and carries out echo cancellation process,
The case where can not eliminating echo can be avoided the occurrence of, so as to improve speech quality.
Another exemplary embodiment of the present invention provides a kind of device for eliminating echo, as shown in figure 3, the device includes：
First determining module 310, the second determining module 320 and processing module 330.
First determining module 310 for playing preset first voice signal by local loud speaker, and determines local wheat
The frequency response of each Frequency point in the first voice signal that gram wind detects；
Second determining module 320 is used for the ginseng of the frequency response and echo cancellation parameters according to pre-stored each Frequency point
The frequency response of each Frequency point in the first voice signal that the correspondence of numerical value and the local microphone detect determines
Corresponding parameter value to be used；
Processing module 330, for during locally carrying out voice communication, according to the parameter value to be used and presetting
Echo cancellation algorithm, to the voice communication during the voice signal that detects of local microphone carry out at echo cancellor
Reason.
Optionally, second determining module 320, is used for：
It is closed according to the default Hz-KHz of pre-stored each Frequency point is corresponding with the parameter value of echo cancellation parameters
Default frequency response model in the first voice signal that system and the local microphone detect belonging to the frequency response of each Frequency point
It encloses, determines corresponding parameter value to be used.
Optionally, as shown in figure 4, second determining module 320, including：
First determination sub-module 321, for determining each frequency in the first voice signal that the local microphone detects
The difference of the frequency response of rate point and the preset reference frequency response of respective frequencies point, and determine the maximum difference in the difference；
Second determination sub-module 322, for according to pre-stored maximum difference and the parameter value of echo cancellation parameters
Correspondence, and the maximum difference determined, determine corresponding parameter value to be used.
Optionally, it as shown in figure 5, described device further includes increasing module 340, is used for：
Preset second voice signal is played by local loud speaker, obtains the second voice letter that local microphone detects
The signal strength values of target frequency point in number, if the signal strength values of target frequency point are less than preset signal strength threshold
Value increases local Mike then according to the difference of the preset signal strength threshold value and the signal strength values of the target frequency point
The gain of wind.
Optionally, as shown in fig. 6, first determining module 310, including：
Display sub-module 311, for when detect the variation of acceleration of itself meet it is preset drop condition when, display
Echo cancellor option；
Third determination sub-module 312, for working as the echo cancellor instruction for detecting and being triggered by the echo cancellor option
When, preset first voice signal is played by local loud speaker, and determine the first voice signal that local microphone detects
In each Frequency point frequency response.
About the device in above-described embodiment, wherein modules execute the concrete mode of operation in related this method
Embodiment in be described in detail, explanation will be not set forth in detail herein.
In the embodiment of the present invention, preset first voice signal is played by local loud speaker, and determine local microphone
The frequency response of each Frequency point, disappears according to the frequency response of pre-stored each Frequency point with echo in the first voice signal detected
The frequency of each Frequency point in the first voice signal detected except the correspondence and local microphone of the parameter value of parameter
It rings, determines corresponding parameter value to be used, during locally carrying out voice communication, according to parameter value to be used and preset
Echo cancellation algorithm, to voice communication during the voice signal that detects of local microphone carry out echo cancellation process,
In this way, terminal is dropped, after causing the sealing structure of microphone to be destroyed, the echo generated in terminal will increase, terminal
The first voice signal that can be detected according to local microphone is chosen suitable parameter value to be used and is carried out at echo cancellor
Reason can avoid the occurrence of the case where can not eliminating echo, so as to improve speech quality.
It should be noted that：The device for the elimination echo that above-described embodiment provides is when eliminating echo, only with above-mentioned each work(
Can module division progress for example, in practical application, can be as needed and by above-mentioned function distribution by different functions
Module is completed, i.e., the internal structure of equipment is divided into different function modules, described above all or part of to complete
Function.In addition, the device for the elimination echo that above-described embodiment provides belongs to same design with the embodiment of the method for eliminating echo,
Specific implementation process refers to embodiment of the method, and which is not described herein again.
The another exemplary embodiment of the present invention provides a kind of structural schematic diagram of terminal.The terminal can be mobile phone or put down
The mobile terminals such as plate computer can be used for executing the method in above-described embodiment.
With reference to Fig. 7, terminal 800 may include following one or more components：Processing component 802, memory 804, power supply
Component 806, multimedia component 808, audio component 810, the interface 812 of input/output (I/O), sensor module 814, and
Communication component 816.
The integrated operation of 802 usual control terminal 800 of processing component, such as with display, call, data communication, phase
Machine operates and record operates associated operation.Processing element 802 may include that one or more processors 820 refer to execute
It enables, to perform all or part of the steps of the methods described above.In addition, processing component 802 may include one or more modules, just
Interaction between processing component 802 and other assemblies.For example, processing component 802 may include multi-media module, it is more to facilitate
Interaction between media component 808 and processing component 802.
Memory 804 is configured as storing various types of data to support the operation in terminal 800.These data are shown
Example includes instruction for any application program or method that are operated in terminal 800, contact data, and telephone book data disappears
Breath, picture, video etc..Memory 804 can be by any kind of volatibility or non-volatile memory device or their group
It closes and realizes, such as static RAM (SRAM), electrically erasable programmable read-only memory (EEPROM) is erasable to compile
Journey read-only memory (EPROM), programmable read only memory (PROM), read-only memory (ROM), magnetic memory, flash
Device, disk or CD.
Electric power assembly 806 provides electric power for the various assemblies of terminal 800.Electric power assembly 806 may include power management system
System, one or more power supplys and other generated with for audio output apparatus 800, management and the associated component of distribution electric power.
Multimedia component 808 is included in the screen of one output interface of offer between the terminal 800 and user.One
In a little embodiments, screen may include liquid crystal display (LCD) and touch panel (TP).If screen includes touch panel, screen
Curtain may be implemented as touch screen, to receive input signal from the user.Touch panel includes one or more touch sensings
Device is to sense the gesture on touch, slide, and touch panel.The touch sensor can not only sense touch or sliding action
Boundary, but also detect duration and pressure associated with the touch or slide operation.In some embodiments, more matchmakers
Body component 808 includes a front camera and/or rear camera.When terminal 800 is in operation mode, such as screening-mode or
When video mode, front camera and/or rear camera can receive external multi-medium data.Each front camera and
Rear camera can be a fixed optical lens system or have focusing and optical zoom capabilities.
Audio component 810 is configured as output and/or input audio signal.For example, audio component 810 includes a Mike
Wind (MIC), when audio output apparatus 800 is in operation mode, when such as call model, logging mode and speech recognition mode, wheat
Gram wind is configured as receiving external audio signal.The received audio signal can be further stored in memory 804 or warp
It is sent by communication component 816.
I/O interfaces 812 provide interface between processing component 802 and peripheral interface module, and above-mentioned peripheral interface module can
To be keyboard, click wheel, button etc..These buttons may include but be not limited to：Home button, volume button, start button and lock
Determine button.
Sensor module 814 includes one or more sensors, and the state for providing various aspects for terminal 800 is commented
Estimate.For example, sensor module 814 can detect the state that opens/closes of terminal 800, and the relative positioning of component, for example, it is described
Component is the display and keypad of terminal 800, and sensor module 814 can be with 800 1 components of detection terminal 800 or terminal
Position change, the existence or non-existence that user contacts with terminal 800,800 orientation of terminal or acceleration/deceleration and terminal 800
Temperature change.Sensor module 814 may include proximity sensor, be configured to detect without any physical contact
Presence of nearby objects.Sensor module 814 can also include optical sensor, such as CMOS or ccd image sensor, at
As being used in application.In some embodiments, which can also include acceleration transducer, gyro sensors
Device, Magnetic Sensor, pressure sensor or temperature sensor.
Communication component 816 is configured to facilitate the communication of wired or wireless way between terminal 800 and other equipment.Eventually
End 800 can access the wireless network based on communication standard, such as WiFi, 2G or 3G or combination thereof.In an exemplary reality
It applies in example, communication component 816 receives broadcast singal or the related letter of broadcast from external broadcasting management system via broadcast channel
Breath.In one exemplary embodiment, the communication component 816 further includes near-field communication (NFC) module, to promote short distance logical
Letter.For example, radio frequency identification (RFID) technology, Infrared Data Association (IrDA) technology, ultra wide band (UWB) can be based in NFC module
Technology, bluetooth (BT) technology and other technologies are realized.
In the exemplary embodiment, terminal 800 can be believed by one or more application application-specific integrated circuit (ASIC), number
Number processor (DSP), digital signal processing appts (DSPD), programmable logic device (PLD), field programmable gate array
(FPGA), controller, microcontroller, microprocessor or other electronic components are realized, for executing the above method.
In the exemplary embodiment, it includes the non-transitorycomputer readable storage medium instructed, example to additionally provide a kind of
Such as include the memory 804 of instruction, above-metioned instruction can be executed by the processor 820 of terminal 800 to complete the above method.For example,
The non-transitorycomputer readable storage medium can be ROM, random access memory (RAM), CD-ROM, tape, floppy disk
With optical data storage devices etc..
Those skilled in the art will readily occur to its of the present invention after considering specification and putting into practice disclosure disclosed herein
Its embodiment.This application is intended to cover the present invention any variations, uses, or adaptations, these modifications, purposes or
Person's adaptive change follows the general principle of the present invention and includes undocumented common knowledge in the art of the invention
Or conventional techniques.The description and examples are only to be considered as illustrative, and true scope and spirit of the invention are by following
Claim is pointed out.
It should be understood that the invention is not limited in the precision architectures for being described above and being shown in the accompanying drawings, and
And various modifications and changes may be made without departing from the scope thereof.The scope of the present invention is limited only by the attached claims.
Claims (7)
1. a kind of method for eliminating echo, which is characterized in that the method includes：
When detect the variation of acceleration of itself meet it is preset drop condition when, show echo cancellor option；
When detecting the echo cancellor instruction triggered by the echo cancellor option, played by local loud speaker preset
First voice signal, and determine the frequency response of each Frequency point in the first voice signal for detecting of local microphone；
According to the correspondence of the frequency response of pre-stored each Frequency point and the parameter value of echo cancellation parameters and described
The frequency response of each Frequency point, determines corresponding parameter value to be used in the first voice signal that ground microphone detects；
During locally carrying out voice communication, according to the parameter value to be used and preset echo cancellation algorithm, to institute
It states the voice signal that local microphone during voice communication detects and carries out echo cancellation process；
Preset second voice signal is played by local loud speaker, is obtained in the second voice signal that local microphone detects
The signal strength values of target frequency point, if the signal strength values of target frequency point are less than preset signal strength threshold value,
According to the difference of the preset signal strength threshold value and the signal strength values of the target frequency point, increase the increasing of local microphone
Benefit.
2. according to the method described in claim 1, it is characterized in that, the frequency response according to pre-stored each Frequency point with
Each frequency in the first voice signal that the correspondence of the parameter value of echo cancellation parameters and the local microphone detect
The frequency response of rate point determines corresponding parameter value to be used, including：
According to the correspondence of the default Hz-KHz of pre-stored each Frequency point and the parameter value of echo cancellation parameters, with
And the default Hz-KHz in the first voice signal for detecting of the local microphone belonging to the frequency response of each Frequency point, it determines
Corresponding parameter value to be used.
3. according to the method described in claim 1, it is characterized in that, the frequency response according to pre-stored each Frequency point with
Each frequency in the first voice signal that the correspondence of the parameter value of echo cancellation parameters and the local microphone detect
The frequency response of rate point determines corresponding parameter value to be used, including：
Determine the pre- of the frequency response of each Frequency point and respective frequencies point in the first voice signal that the local microphone detects
If the difference of benchmark frequency response, and determine the maximum difference in the difference；
According to the correspondence of pre-stored maximum difference and the parameter value of echo cancellation parameters, and the maximum determined is poor
Value, determines corresponding parameter value to be used.
4. a kind of device for eliminating echo, which is characterized in that described device includes：
First determining module, first determining module include：
Display sub-module, for when detect the variation of acceleration of itself meet it is preset drop condition when, display echo disappear
Except option；
Third determination sub-module, for when detecting the echo cancellor instruction triggered by the echo cancellor option, passing through
Local loud speaker plays preset first voice signal, and determines each frequency in the first voice signal that local microphone detects
The frequency response of rate point；
Second determining module is used for pair of the parameter value of the frequency response and echo cancellation parameters according to pre-stored each Frequency point
Should be related to and the first voice signal that the local microphone detects in each Frequency point frequency response, determine corresponding wait for
Use parameter value；
Processing module is used for during locally carrying out voice communication, according to the parameter value to be used and preset echo
Elimination algorithm, to the voice communication during the voice signal that detects of local microphone carry out echo cancellation process；
Described device further includes increasing module, is used for：
Preset second voice signal is played by local loud speaker, is obtained in the second voice signal that local microphone detects
The signal strength values of target frequency point, if the signal strength values of target frequency point are less than preset signal strength threshold value,
According to the difference of the preset signal strength threshold value and the signal strength values of the target frequency point, increase the increasing of local microphone
Benefit.
5. device according to claim 4, which is characterized in that second determining module is used for：
According to the correspondence of the default Hz-KHz of pre-stored each Frequency point and the parameter value of echo cancellation parameters, with
And the default Hz-KHz in the first voice signal for detecting of the local microphone belonging to the frequency response of each Frequency point, it determines
Corresponding parameter value to be used.
6. device according to claim 4, which is characterized in that second determining module, including：
First determination sub-module, the frequency for determining each Frequency point in the first voice signal that the local microphone detects
The difference with the preset reference frequency response of respective frequencies point is rung, and determines the maximum difference in the difference；
Second determination sub-module, for being closed according to pre-stored maximum difference is corresponding with the parameter value of echo cancellation parameters
It is, and the maximum difference determined, determines corresponding parameter value to be used.
7. a kind of device for eliminating echo, which is characterized in that including：
Processor；
Memory for storing processor-executable instruction；
Wherein, the processor is configured as：
When detect the variation of acceleration of itself meet it is preset drop condition when, show echo cancellor option；
When detecting the echo cancellor instruction triggered by the echo cancellor option, played by local loud speaker preset
First voice signal, and determine the frequency response of each Frequency point in the first voice signal for detecting of local microphone；
According to the correspondence of the frequency response of pre-stored each Frequency point and the parameter value of echo cancellation parameters and described
The frequency response of each Frequency point, determines corresponding parameter value to be used in the first voice signal that ground microphone detects；
During locally carrying out voice communication, according to the parameter value to be used and preset echo cancellation algorithm, to institute
It states the voice signal that local microphone during voice communication detects and carries out echo cancellation process；
Preset second voice signal is played by local loud speaker, is obtained in the second voice signal that local microphone detects
The signal strength values of target frequency point, if the signal strength values of target frequency point are less than preset signal strength threshold value,
According to the difference of the preset signal strength threshold value and the signal strength values of the target frequency point, increase the increasing of local microphone
Benefit.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105657110B (en) * | 2016-02-26 | 2020-02-14 | 深圳Tcl数字技术有限公司 | Echo cancellation method and device for voice communication |
| CN107452398B (en) * | 2017-08-09 | 2021-03-16 | 深圳创维数字技术有限公司 | Echo acquisition method, electronic device and computer readable storage medium |
| CN109068251A (en) * | 2018-07-10 | 2018-12-21 | 深圳市亿鑫数字科技有限公司 | A kind of automatic balancing method and system of intelligent hearing aid |
| CN110797048B (en) * | 2018-08-01 | 2022-09-13 | 珠海格力电器股份有限公司 | Method and device for acquiring voice information |
| WO2020097828A1 (en) * | 2018-11-14 | 2020-05-22 | 深圳市欢太科技有限公司 | Echo cancellation method, delay estimation method, echo cancellation apparatus, delay estimation apparatus, storage medium, and device |
| CN109360562B (en) * | 2018-12-07 | 2022-06-28 | 深圳创维－Rgb电子有限公司 | Echo cancellation method, device, medium, and voice wake-up method and device |
| CN109788399A (en) * | 2019-01-30 | 2019-05-21 | 珠海迈科智能科技股份有限公司 | A kind of echo cancel method and system of speaker |
| CN109979469B (en) * | 2019-04-03 | 2021-04-23 | 北京小米智能科技有限公司 | Signal processing method, apparatus and storage medium |
| CN110246515B (en) * | 2019-07-19 | 2023-10-24 | 腾讯科技（深圳）有限公司 | Echo cancellation method and device, storage medium and electronic device |
| CN111182435B (en) * | 2020-01-13 | 2021-11-09 | 北京小米松果电子有限公司 | Testing method and device of voice equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101313483A (en) * | 2005-11-17 | 2008-11-26 | 微软公司 | Configuration of echo cancellation |
| CN202602769U (en) * | 2012-02-29 | 2012-12-12 | 青岛海信移动通信技术股份有限公司 | Conversation type electronic product with echo inhibition function |
| CN103999478A (en) * | 2011-12-16 | 2014-08-20 | 高通股份有限公司 | Optimizing audio processing functions by dynamically compensating for variable distances between speaker(s) and microphone(s) in an accessory device |
| CN104519212A (en) * | 2013-09-27 | 2015-04-15 | 华为技术有限公司 | An echo cancellation method and apparatus |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9100466B2 (en) * | 2013-05-13 | 2015-08-04 | Intel IP Corporation | Method for processing an audio signal and audio receiving circuit |
-
2015
- 2015-07-28 CN CN201510450913.8A patent/CN105187594B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101313483A (en) * | 2005-11-17 | 2008-11-26 | 微软公司 | Configuration of echo cancellation |
| CN103999478A (en) * | 2011-12-16 | 2014-08-20 | 高通股份有限公司 | Optimizing audio processing functions by dynamically compensating for variable distances between speaker(s) and microphone(s) in an accessory device |
| CN202602769U (en) * | 2012-02-29 | 2012-12-12 | 青岛海信移动通信技术股份有限公司 | Conversation type electronic product with echo inhibition function |
| CN104519212A (en) * | 2013-09-27 | 2015-04-15 | 华为技术有限公司 | An echo cancellation method and apparatus |
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