CN105187594A - Echo canceling method and device - Google Patents
Echo canceling method and device Download PDFInfo
- Publication number
- CN105187594A CN105187594A CN201510450913.8A CN201510450913A CN105187594A CN 105187594 A CN105187594 A CN 105187594A CN 201510450913 A CN201510450913 A CN 201510450913A CN 105187594 A CN105187594 A CN 105187594A
- Authority
- CN
- China
- Prior art keywords
- voice signal
- frequency point
- parameter value
- frequency response
- echo
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
The invention provides an echo canceling method and device, and belongs to the technical field of computers. The echo canceling method comprises the steps: playing a preset first voice signal by a local speaker, and determining frequency response of each frequency point in the first voice signal detected by a local microphone; determining a corresponding to-be-used parameter value according to a corresponding relation of pre-stored frequency response of each frequency point and a parameter value of an echo canceling parameter, and the frequency response of each frequency point in the first voice signal detected by the local microphone; in a process of locally performing voice communication, performing an echo canceling operation on the voice signal detected by the local microphone in the voice communication process according to the to-be-used parameter value and a preset echo canceling algorithm. According to application of the echo canceling method and device, the voice quality can be improved.
Description
Technical field
The invention relates to field of computer technology, especially about a kind of method and apparatus eliminating echo.
Background technology
Along with the development of mobile terminal technology, the application of mobile terminal also comes more extensive, and function also from strength to strength.Usually be provided with loud speaker and microphone in mobile terminal, wherein, microphone is generally provided with hermetically-sealed construction, imports echogenicity in microphone into prevent the sound of loud speaker.
In practice, the reasons such as bad are assembled owing to producing, there will be the situation that the sealing of the hermetically-sealed construction of the microphone of mobile terminal is poor, the sound that loud speaker is play can import in microphone, like this, when user uses this mobile terminal and other users to converse, the other side can hear the echo of himself.Therefore, technical staff can arrange echo cancellation algorithm in the terminal, eliminates by the echo in process.When eliminating echo; if the dynamics eliminating echo is excessive; not only can eliminate the echo of the other side; also call sound originally can be eliminated; so; the sealing situation of the hermetically-sealed construction of microphone when technical staff can be dispatched from the factory according to mobile terminal usually, arranges the echo cancellor formula in echo cancellation algorithm, reasonably to eliminate echo.
Realizing in process of the present invention, inventor finds at least there is following problem:
User is in the process using mobile terminal, there will be the situation that mobile terminal is dropped, the hermetically-sealed construction of microphone can be caused like this to be damaged, the echo produced in mobile terminal also can increase, like this, the echo cancellation algorithm pre-set cannot eliminate echo, and speech quality can be caused so poor.
Summary of the invention
In order to overcome Problems existing in correlation technique, the invention provides a kind of method and apparatus eliminating echo.Described technical scheme is as follows:
According to the first aspect of the embodiment of the present invention, provide a kind of method eliminating echo, described method comprises:
The first voice signal preset is play by local loud speaker, and the frequency response of each Frequency point in determining the first voice signal that local microphone detects;
According to the corresponding relation of the frequency response of each Frequency point prestored and the parameter value of echo cancellation parameters, and the frequency response of each Frequency point in the first voice signal of detecting of described local microphone, determine corresponding parameter value to be used;
Carry out in this locality in the process of voice communication, according to described parameter value to be used and default echo cancellation algorithm, echo cancellation process is carried out to the voice signal that local microphone in the process of described voice communication detects.
Optionally, the corresponding relation of the frequency response of each Frequency point that described basis prestores and the parameter value of echo cancellation parameters, and the frequency response of each Frequency point in the first voice signal of detecting of described local microphone, determine corresponding parameter value to be used, comprising:
According to the corresponding relation of the default Hz-KHz of each Frequency point prestored and the parameter value of echo cancellation parameters, and the default Hz-KHz belonging to frequency response of each Frequency point in the first voice signal of detecting of described local microphone, determine corresponding parameter value to be used.
Optionally, the corresponding relation of the frequency response of each Frequency point that described basis prestores and the parameter value of echo cancellation parameters, and the frequency response of each Frequency point in the first voice signal of detecting of described local microphone, determine corresponding parameter value to be used, comprising:
Determine the difference of the frequency response of each Frequency point and the preset reference frequency response of respective frequencies point in the first voice signal that described local microphone detects, and determine the maximum difference in described difference;
According to the corresponding relation of the parameter value of the maximum difference prestored and echo cancellation parameters, and the maximum difference determined, determine corresponding parameter value to be used.
Optionally, described method also comprises:
The second voice signal preset is play by local loud speaker, the signal strength values of target frequency point in the second voice signal that acquisition local microphone detects, if the signal strength values of described target frequency point is less than preset signal strength threshold value, then according to the difference of the signal strength values of described preset signal strength threshold value and described target frequency point, increase the gain of local microphone.
Optionally, describedly play the first voice signal preset by local loud speaker, and the frequency response of each Frequency point in determining the first voice signal that local microphone detects, comprising:
When the change of the acceleration detecting self meet default drop condition time, display echo cancellor option;
When the echo cancellor instruction triggered by described echo cancellor option being detected, play the first voice signal preset by local loud speaker, and the frequency response of each Frequency point in determining the first voice signal that local microphone detects.
According to the second aspect of the embodiment of the present invention, provide a kind of device eliminating echo, described device comprises:
First determination module, for being play the first voice signal preset by local loud speaker, and the frequency response of each Frequency point in determining the first voice signal that local microphone detects;
Second determination module, for the corresponding relation according to the frequency response of each Frequency point prestored and the parameter value of echo cancellation parameters, and the frequency response of each Frequency point in the first voice signal of detecting of described local microphone, determine corresponding parameter value to be used;
Processing module, for carrying out in the process of voice communication in this locality, according to described parameter value to be used and default echo cancellation algorithm, carries out echo cancellation process to the voice signal that local microphone in the process of described voice communication detects.
Optionally, described second determination module, for:
According to the corresponding relation of the default Hz-KHz of each Frequency point prestored and the parameter value of echo cancellation parameters, and the default Hz-KHz belonging to frequency response of each Frequency point in the first voice signal of detecting of described local microphone, determine corresponding parameter value to be used.
Optionally, described second determination module, comprising:
First determines submodule, for determining the difference of the frequency response of each Frequency point and the preset reference frequency response of respective frequencies point in the first voice signal that described local microphone detects, and determines the maximum difference in described difference;
Second determines submodule, for the corresponding relation of the parameter value according to the maximum difference prestored and echo cancellation parameters, and the maximum difference determined, determine corresponding parameter value to be used.
Optionally, described device also comprises increase module, for:
The second voice signal preset is play by local loud speaker, the signal strength values of target frequency point in the second voice signal that acquisition local microphone detects, if the signal strength values of described target frequency point is less than preset signal strength threshold value, then according to the difference of the signal strength values of described preset signal strength threshold value and described target frequency point, increase the gain of local microphone.
Optionally, described first determination module, comprising:
Display sub-module, for meet when the change of the acceleration detecting self default drop condition time, display echo cancellor option;
3rd determines submodule, for when the echo cancellor instruction triggered by described echo cancellor option being detected, the first voice signal preset is play by local loud speaker, and the frequency response of each Frequency point in determining the first voice signal that local microphone detects.
According to the third aspect of the embodiment of the present invention, a kind of device eliminating echo is provided, comprises:
Processor;
For the memory of storage of processor executable instruction;
Wherein, described processor is configured to:
The first voice signal preset is play by local loud speaker, and the frequency response of each Frequency point in determining the first voice signal that local microphone detects;
According to the corresponding relation of the frequency response of each Frequency point prestored and the parameter value of echo cancellation parameters, and the frequency response of each Frequency point in the first voice signal of detecting of described local microphone, determine corresponding parameter value to be used;
Carry out in this locality in the process of voice communication, according to described parameter value to be used and default echo cancellation algorithm, echo cancellation process is carried out to the voice signal that local microphone in the process of described voice communication detects.
The technical scheme that embodiments of the invention provide can comprise following beneficial effect:
In the embodiment of the present invention, the first voice signal preset is play by local loud speaker, and the frequency response of each Frequency point in determining the first voice signal that local microphone detects, according to the corresponding relation of the frequency response of each Frequency point prestored and the parameter value of echo cancellation parameters, and the frequency response of each Frequency point in the first voice signal of detecting of local microphone, determine corresponding parameter value to be used, carry out in the process of voice communication in this locality, according to parameter value to be used and default echo cancellation algorithm, echo cancellation process is carried out to the voice signal that local microphone in the process of voice communication detects, like this, terminal is dropped, after causing the hermetically-sealed construction of microphone to be damaged, the echo produced in terminal can increase, the first voice signal that terminal can detect according to local microphone, choose suitable parameter value to be used and carry out echo cancellation process, the situation occurring eliminating echo can be avoided, thus can speech quality be improved.
Should be understood that, it is only exemplary and explanatory that above general description and details hereinafter describe, and can not limit the present invention.
Accompanying drawing explanation
Accompanying drawing to be herein merged in specification and to form the part of this specification, shows embodiment according to the invention, and is used from specification one and explains principle of the present invention.In the accompanying drawings:
Fig. 1 is a kind of flow chart eliminating the method for echo according to an exemplary embodiment;
Fig. 2 is the structural representation of a kind of terminal according to an exemplary embodiment;
Fig. 3 is a kind of schematic diagram eliminating the device of echo according to an exemplary embodiment;
Fig. 4 is a kind of schematic diagram eliminating the device of echo according to an exemplary embodiment;
Fig. 5 is a kind of schematic diagram eliminating the device of echo according to an exemplary embodiment;
Fig. 6 is a kind of schematic diagram eliminating the device of echo according to an exemplary embodiment;
Fig. 7 is the structural representation of a kind of terminal according to an exemplary embodiment.
By above-mentioned accompanying drawing, illustrate the embodiment that the present invention is clear and definite more detailed description will be had hereinafter.These accompanying drawings and text description be not in order to limited by any mode the present invention design scope, but by reference to specific embodiment for those skilled in the art illustrate concept of the present invention.
Embodiment
Here will be described exemplary embodiment in detail, its sample table shows in the accompanying drawings.When description below relates to accompanying drawing, unless otherwise indicated, the same numbers in different accompanying drawing represents same or analogous key element.Execution mode described in following exemplary embodiment does not represent all execution modes consistent with the present invention.On the contrary, they only with as in appended claims describe in detail, the example of apparatus and method that aspects more of the present invention are consistent.
The present invention one exemplary embodiment provides a kind of method eliminating echo, and as shown in Figure 1, the handling process of the method can comprise following step:
In a step 101, play the first voice signal preset by local loud speaker, and the frequency response of each Frequency point in determining the first voice signal that local microphone detects.
In a step 102, according to the corresponding relation of the frequency response of each Frequency point prestored and the parameter value of echo cancellation parameters, and the frequency response of each Frequency point in the first voice signal of detecting of local microphone, determine corresponding parameter value to be used.
In step 103, carry out in this locality in the process of voice communication, according to parameter value to be used and default echo cancellation algorithm, echo cancellation process is carried out to the voice signal that local microphone in the process of voice communication detects.
In the embodiment of the present invention, the first voice signal preset is play by local loud speaker, and the frequency response of each Frequency point in determining the first voice signal that local microphone detects, according to the corresponding relation of the frequency response of each Frequency point prestored and the parameter value of echo cancellation parameters, and the frequency response of each Frequency point in the first voice signal of detecting of local microphone, determine corresponding parameter value to be used, carry out in the process of voice communication in this locality, according to parameter value to be used and default echo cancellation algorithm, echo cancellation process is carried out to the voice signal that local microphone in the process of voice communication detects, like this, terminal is dropped, after causing the hermetically-sealed construction of microphone to be damaged, the echo produced in terminal can increase, the first voice signal that terminal can detect according to local microphone, choose suitable parameter value to be used and carry out echo cancellation process, the situation occurring eliminating echo can be avoided, thus can speech quality be improved.
Another exemplary embodiment of the present invention provides a kind of method eliminating echo, and the method may be used in terminal, and wherein, terminal can be the terminal with function of voice communication, as the mobile terminal such as mobile phone or panel computer.Described terminal can comprise loud speaker, and described loud speaker is for playing voice signal, and described voice signal can for the first voice signal preset, described terminal can comprise microphone, the voice signal that described microphone is play for detecting described loud speaker, and can by the transmitting voice signal that detects to processor, described terminal can comprise processor, described processor may be used for the frequency response of each Frequency point in the first voice signal determining that local microphone detects, according to the corresponding relation of the frequency response of each Frequency point prestored and the parameter value of echo cancellation parameters, and the frequency response of each Frequency point in the first voice signal of detecting of local microphone, determine corresponding parameter value to be used, carry out in the process of voice communication in this locality, described processor can according to parameter value to be used and the echo cancellation algorithm preset, echo cancellation process is carried out to the voice signal that local microphone in the process of voice communication detects, described terminal can comprise input unit, and described input unit can be button, can be touch-screen, and user can open the application program with echo cancellation performance by input unit, described terminal can comprise display unit, and described display unit can be liquid crystal display, and display unit can show echo cancellor option.In addition, described terminal can also comprise the parts such as memory, transducer, voicefrequency circuit, bluetooth, WiFi (Wirelessfidelity, adopting wireless fidelity technology) and power supply.
Below in conjunction with execution mode, be described in detail the handling process shown in Fig. 1, content can be as follows:
In a step 101, play the first voice signal preset by local loud speaker, and the frequency response of each Frequency point in determining the first voice signal that local microphone detects.
In force, user can install the application program with the function eliminating echo in terminal, when user wants to carry out elimination echo to terminal, user can click the icon of this application program, terminal then can receive should the click commands of icon of application program, then can open this application program, show the homepage of this application program.User can in the homepage of this application program, click echo cancellor option, terminal then can detect the click commands of corresponding echo cancellor option, then can play by local loud speaker the first voice signal preset, first voice signal can be swept-frequency signal, the frequency range of swept-frequency signal can be from low to high, and the frequency range as swept-frequency signal is 300 ~ 10K.Swept-frequency signal can be octave signal, and said frequencies point can be the Frequency point in octave signal.
Wherein, octave can be the spectrum space that frequency doubles occupied by frequency spectrum, for different initial frequency point frequency multiplication occupied by spectrum space be not identical, such as initial frequency point is 100HZ, then an octave is exactly from 100HZ ~ 200HZ, if starting point frequency is 200HZ, then an octave is exactly from 200HZ ~ 400HZ, if starting point frequency is 400HZ, then an octave is exactly from 400HZ ~ 800HZ ... by that analogy.Namely 1/N octave signal arranges 12 frequencies in an octave, is spaced apart 1/12 octave between each, and concrete account form 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 frequency that first Frequency point is corresponding is 100HZ*1.055=105.5HZ.For second Frequency point 2/12=lgx/lg2, lgx=0.3010 × 2/12=0.0501, x=1.122, the frequency that second Frequency point is corresponding is 100HZ*1.122=112.2HZ, by that analogy.
Terminal plays the first voice signal preset by local loud speaker after, local microphone can detect the first voice signal, local microphone can by the first transmitting voice signal of detecting to the processor of terminal, and the processor of terminal then can determine the frequency response of each Frequency point in the first voice signal that local microphone detects.Wherein, frequency response also can be called frequency response, for representing the signal magnitude of the first voice signal at this Frequency point.
In addition, this application program can when reaching predetermined period, the information (as shown PUSH message in informing) eliminating echo is pushed to user, after user receives the information of this elimination echo, can by clicking this information, or click the icon of the application program eliminating echo, open the application program eliminating echo, then carry out the operation of elimination echo.
Optionally, can arrange and eliminate the trigger condition of echo, accordingly, the processing procedure of step 101 can be as follows: when the change of the acceleration detecting self meet default drop condition time, display echo cancellor option; When the echo cancellor instruction triggered by echo cancellor option being detected, play the first voice signal preset by local loud speaker, and the frequency response of each Frequency point in determining the first voice signal that local microphone detects.
In force, the transducer for detecting self-acceleration can be provided with in terminal, as acceleration induction device, the condition of dropping can also be pre-set in terminal, namely the acceleration of terminal is first acceleration of gravity, become direction acceleration straight up after keeping a period of time, then in preset duration, become 0.Terminal can detect self acceleration in real time, when the change of the acceleration detecting self meet default drop condition time, can display reminding frame, echo cancellor option can be shown in this prompting frame, namely after terminal is dropped, the prompting frame including echo cancellor option can be shown, after user sees this prompting frame, the echo cancellor option in this prompting frame can be clicked, terminal then can receive the click commands (i.e. echo cancellor instruction) of corresponding echo cancellor option, then can play by local loud speaker the first voice signal preset, and the frequency response of each Frequency point in determining the first voice signal that local microphone detects.
In a step 102, according to the corresponding relation of the frequency response of each Frequency point prestored and the parameter value of echo cancellation parameters, and the frequency response of each Frequency point in the first voice signal of detecting of local microphone, determine corresponding parameter value to be used.
In force, echo cancellation algorithm can be previously stored with in terminal, echo cancellation algorithm can adopt existing echo cancellation algorithm, several echo cancellation parameters can be comprised, as linear echo eliminates length, linear echo elimination dynamics and the nonlinear echo elimination dynamics etc. of filter in echo cancellation algorithm.The dynamics that terminal eliminates echo is relevant with the parameter value of echo cancellation parameters.Such as, when the dynamics of elimination echo is more weak, the length that linear echo eliminates filter is 5, and it is 10 that linear echo eliminates dynamics, and it is 15 that nonlinear echo eliminates dynamics; When the dynamics of elimination echo is stronger, the length that linear echo eliminates filter is 10, and it is 15 that linear echo eliminates dynamics, and it is 20 that nonlinear echo eliminates dynamics.For the parameter value of the echo cancellation parameters corresponding to a certain elimination echo dynamics, the set of parameter value of echo cancellation parameters can be called, the parameter value of echo cancellation parameters corresponding to multiple elimination echo dynamics can be prestored in terminal, i.e. storing multiple sets parameter value, to be applicable to the different sealing situation of local microphone.
Terminal according to the frequency response each Frequency point in the first voice signal being detected, can judge the dynamics needing to eliminate echo, namely determines the parameter value to be used of echo cancellation parameters.Can the corresponding relation of the frequency response of storing frequencies point and the parameter value of echo cancellation parameters in terminal, then can according to the corresponding relation of the frequency response of each Frequency point prestored and the parameter value of echo cancellation parameters, and the frequency response of each Frequency point in the first voice signal of detecting of local microphone, determine corresponding 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 corresponding relation of the default Hz-KHz of each Frequency point prestored and the parameter value of echo cancellation parameters, and the default Hz-KHz belonging to frequency response of each Frequency point in the first voice signal of detecting of local microphone, determine corresponding parameter value to be used.
In force, if the sealing situation of local Mike is different, then the frequency response of the first voice signal that detects of local Mike is also different.Such as, when the sealing situation of local microphone is better, 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, the frequency response of Frequency point c is-45dB, when the sealing situation of local microphone is poor, in the first voice signal that local Mike detects, the frequency response of Frequency point a is-45dB, the frequency response of Frequency point b is-27dB, and the frequency response of Frequency point c is-50dB.For any set of parameter value, can have the echo cancellor scope that it is suitable for, namely the corresponding every suit parameter value of each Frequency point can arrange corresponding Hz-KHz (namely presetting Hz-KHz).Such as, for first set parameter value, the default Hz-KHz of Frequency point a is-25dB ~-35dB, and the default Hz-KHz of Frequency point b is-30dB ~-40dB, and the default Hz-KHz of Frequency point c is-55dB ~-60dB; For the second cover parameter value, the default Hz-KHz of Frequency point a is-35dB ~-45dB, and the default Hz-KHz of Frequency point b is-40dB ~-50dB, and the default Hz-KHz of Frequency point c is-60dB ~-70dB.
In the first voice signal that terminal determination local microphone detects each Frequency point frequency response after, the default Hz-KHz belonging to frequency response of each Frequency point can be judged, and then can according to the corresponding relation of the parameter value of the default Hz-KHz of each Frequency point prestored and echo cancellation parameters, and the default Hz-KHz belonging to frequency response of each Frequency point in the first voice signal of detecting of local microphone, determine corresponding parameter value to be used.Such as, terminal detects that the frequency response of Frequency point a be the frequency response of-27dB, Frequency point b is-32dB, and the frequency response of Frequency point c is-58dB, then can determine that corresponding parameter value to be used is first set parameter value.
In addition, in the first voice signal that local microphone detects, default Hz-KHz belonging to the frequency response of Frequency point corresponding may overlap parameter value more, at this moment, terminal can be determined often to overlap the number that parameter value corresponds to Frequency point, using that maximum for the number of the Frequency point of correspondence cover parameter values as parameter value to be used.Such as, terminal detects that the frequency response of Frequency point a be the frequency response of-27dB, Frequency point b is-45dB, and the frequency response of Frequency point c is-68dB, then can determine that corresponding parameter value to be used is the second cover parameter value.Terminal also can be determined often to overlap the number that parameter value corresponds to higher frequency point (Frequency point as more than 3K), using that maximum for the number of the higher frequency of correspondence point cover parameter values as parameter value to be used.
Mode two: the difference determining the frequency response of each Frequency point and the preset reference frequency response of respective frequencies point in the first voice signal that local microphone detects, and determine the maximum difference in difference; According to the corresponding relation of the parameter value of the maximum difference prestored and echo cancellation parameters, and the maximum difference determined, determine corresponding parameter value to be used.
In force, the preset reference frequency response that each Frequency point is corresponding can be pre-set in terminal, technical staff can play the first voice signal preset by the local loud speaker when terminal is dispatched from the factory by terminal, terminal then can determine the frequency response of each Frequency point in the first voice signal that local microphone detects, terminal can carry out repeatedly frequency response check processing, using the mean value that detects the frequency response of each Frequency point obtained as preset reference frequency response corresponding to each Frequency point.
In the first voice signal that terminal determination local microphone detects each Frequency point frequency response after, the frequency response of each Frequency point can be deducted with the preset reference frequency response that each Frequency point is corresponding, obtain the difference of the frequency response of each Frequency point and the preset reference frequency response of respective frequencies point, then can determine the maximum difference in these differences.The corresponding relation of the parameter value of maximum difference and echo cancellation parameters can be prestored in terminal, can store in terminal and often overlap difference range corresponding to parameter value, and the difference range belonging to maximum difference that calculates can be judged, then can determine the parameter value of the echo cancellation parameters that this difference range is corresponding, obtain parameter value to be used.Such as, the difference range that first set parameter value is corresponding is 0dB ~ 5dB, the difference range that second cover parameter value is corresponding is 6dB ~ 10dB, the difference range that 3rd cover parameter value is corresponding is 11dB ~ 15dB, the maximum difference that terminal calculates is 7dB, then can determine that the second cover parameter value is parameter value to be used.
In step 103, carry out in this locality in the process of voice communication, according to parameter value to be used and default echo cancellation algorithm, echo cancellation process is carried out to the voice signal that local microphone in the process of voice communication detects.
In force, in the process using terminal, may there is the situation that mobile terminal is dropped in user, the hermetically-sealed construction of microphone can be caused like this to be damaged, the voice signal that loud speaker is play then can import into microphone from terminal inner, thus echogenicity, as shown in Figure 2.The parameter value to be used determined can be brought in default echo cancellation algorithm by terminal, carry out in the process of voice communication in this locality, terminal according to parameter value to be used and the echo cancellation algorithm preset, can carry out echo cancellation process to the voice signal that local microphone in the process of voice communication detects.
Optionally, terminal can adjust the signal strength signal intensity of voice signal, corresponding processing procedure can be as follows: play the second voice signal preset by local loud speaker, the signal strength values of target frequency point in the second voice signal that acquisition local microphone detects, if the signal strength values of target frequency point is less than preset signal strength threshold value, then according to the difference of the signal strength values of preset signal strength threshold value and target frequency point, increase the gain of local microphone.
In force, terminal can play by local loud speaker the second voice signal preset, and can comprise target frequency point in the Frequency point of the second voice signal, the Frequency point of target frequency point can be frequency be 1K.Second voice signal can be identical with the first voice, also can be different from the first voice signal.Terminal plays the second voice signal preset by local loud speaker after, the second voice signal that local microphone then can detect, terminal can obtain the signal strength values of target frequency point in the second voice signal that local microphone detects, this signal strength values can be the level value of target frequency point.Terminal can judge whether the signal strength values of the target frequency point detected is less than preset signal strength threshold value, if the signal strength values of target frequency point is less than preset signal strength threshold value, then terminal can calculate the difference of the signal strength values of preset signal strength threshold value and target frequency point, then the gain of local microphone can be increased this difference decibel.Such as, predetermined level threshold value is-25dB, and the current gain of local microphone is 10dB, and the level value of target frequency point is-30dB, then can determine that difference is 5dB, can be then 15dB by the Gain tuning of local microphone.After terminal increases the gain of local microphone, the first voice signal preset can be play by local loud speaker, and the frequency response of each Frequency point in determining the first voice signal that local microphone detects, and then the parameter value to be used of each echo cancellation parameters can be determined by above-mentioned process, carry out in this locality in the process of voice communication, echo cancellation process is carried out to the voice signal that local microphone in the process of voice communication detects.
In the embodiment of the present invention, the first voice signal preset is play by local loud speaker, and the frequency response of each Frequency point in determining the first voice signal that local microphone detects, according to the corresponding relation of the frequency response of each Frequency point prestored and the parameter value of echo cancellation parameters, and the frequency response of each Frequency point in the first voice signal of detecting of local microphone, determine corresponding parameter value to be used, carry out in the process of voice communication in this locality, according to parameter value to be used and default echo cancellation algorithm, echo cancellation process is carried out to the voice signal that local microphone in the process of voice communication detects, like this, terminal is dropped, after causing the hermetically-sealed construction of microphone to be damaged, the echo produced in terminal can increase, the first voice signal that terminal can detect according to local microphone, choose suitable parameter value to be used and carry out echo cancellation process, the situation occurring eliminating echo can be avoided, thus can speech quality be improved.
The another exemplary embodiment of the present invention provides a kind of device eliminating echo, and as shown in Figure 3, this device comprises: the first determination module 310, second determination module 320 and processing module 330.
First determination module 310, for being play the first voice signal preset by local loud speaker, and the frequency response of each Frequency point in determining the first voice signal that local microphone detects;
Second determination module 320, for the corresponding relation according to the frequency response of each Frequency point prestored and the parameter value of echo cancellation parameters, and the frequency response of each Frequency point in the first voice signal of detecting of described local microphone, determine corresponding parameter value to be used;
Processing module 330, for carrying out in the process of voice communication in this locality, according to described parameter value to be used and default echo cancellation algorithm, carries out echo cancellation process to the voice signal that local microphone in the process of described voice communication detects.
Optionally, described second determination module 320, for:
According to the corresponding relation of the default Hz-KHz of each Frequency point prestored and the parameter value of echo cancellation parameters, and the default Hz-KHz belonging to frequency response of each Frequency point in the first voice signal of detecting of described local microphone, determine corresponding parameter value to be used.
Optionally, as shown in Figure 4, described second determination module 320, comprising:
First determines submodule 321, for determining the difference of the frequency response of each Frequency point and the preset reference frequency response of respective frequencies point in the first voice signal that described local microphone detects, and determines the maximum difference in described difference;
Second determines submodule 322, for the corresponding relation of the parameter value according to the maximum difference prestored and echo cancellation parameters, and the maximum difference determined, determine corresponding parameter value to be used.
Optionally, as shown in Figure 5, described device also comprises increase module 340, for:
The second voice signal preset is play by local loud speaker, the signal strength values of target frequency point in the second voice signal that acquisition local microphone detects, if the signal strength values of described target frequency point is less than preset signal strength threshold value, then according to the difference of the signal strength values of described preset signal strength threshold value and described target frequency point, increase the gain of local microphone.
Optionally, as shown in Figure 6, described first determination module 310, comprising:
Display sub-module 311, for meet when the change of the acceleration detecting self default drop condition time, display echo cancellor option;
3rd determines submodule 312, for when the echo cancellor instruction triggered by described echo cancellor option being detected, the first voice signal preset is play by local loud speaker, and the frequency response of each Frequency point in determining the first voice signal that local microphone detects.
About the device in above-described embodiment, wherein the concrete mode of modules executable operations has been described in detail in about the embodiment of the method, will not elaborate explanation herein.
In the embodiment of the present invention, the first voice signal preset is play by local loud speaker, and the frequency response of each Frequency point in determining the first voice signal that local microphone detects, according to the corresponding relation of the frequency response of each Frequency point prestored and the parameter value of echo cancellation parameters, and the frequency response of each Frequency point in the first voice signal of detecting of local microphone, determine corresponding parameter value to be used, carry out in the process of voice communication in this locality, according to parameter value to be used and default echo cancellation algorithm, echo cancellation process is carried out to the voice signal that local microphone in the process of voice communication detects, like this, terminal is dropped, after causing the hermetically-sealed construction of microphone to be damaged, the echo produced in terminal can increase, the first voice signal that terminal can detect according to local microphone, choose suitable parameter value to be used and carry out echo cancellation process, the situation occurring eliminating echo can be avoided, thus can speech quality be improved.
It should be noted that: the device of the elimination echo that above-described embodiment provides is when eliminating echo, only be illustrated with the division of above-mentioned each functional module, in practical application, can distribute as required and by above-mentioned functions and be completed by different functional modules, internal structure by equipment is divided into different functional modules, to complete all or part of function described above.In addition, the device of the elimination echo that above-described embodiment provides belongs to same design with the embodiment of the method eliminating echo, and its specific implementation process refers to embodiment of the method, repeats no more here.
A present invention again exemplary embodiment provides a kind of structural representation of terminal.This terminal can be the mobile terminal such as mobile phone or panel computer, may be used for performing the method in above-described embodiment.
With reference to Fig. 7, terminal 800 can comprise following one or more assembly: processing components 802, memory 804, power supply module 806, multimedia groupware 808, audio-frequency assembly 810, the interface 812 of I/O (I/O), sensor cluster 814, and communications component 816.
The integrated operation of the usual control terminal 800 of processing components 802, such as with display, call, data communication, camera operation and record operate the operation be associated.Treatment element 802 can comprise one or more processor 820 to perform instruction, to complete all or part of step of above-mentioned method.In addition, processing components 802 can comprise one or more module, and what be convenient between processing components 802 and other assemblies is mutual.Such as, processing unit 802 can comprise multi-media module, mutual with what facilitate between multimedia groupware 808 and processing components 802.
Memory 804 is configured to store various types of data to be supported in the operation of terminal 800.The example of these data comprises for any application program of operation in terminal 800 or the instruction of method, contact data, telephone book data, message, picture, video etc.Memory 804 can be realized by the volatibility of any type or non-volatile memory device or their combination, as static RAM (SRAM), Electrically Erasable Read Only Memory (EEPROM), Erasable Programmable Read Only Memory EPROM (EPROM), programmable read only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, disk or CD.
The various assemblies that electric power assembly 806 is terminal 800 provide electric power.Electric power assembly 806 can comprise power-supply management system, one or more power supply, and other and the assembly generating, manage and distribute electric power for audio output apparatus 800 and be associated.
Multimedia groupware 808 is included in the screen providing an output interface between described terminal 800 and user.In certain embodiments, screen can comprise liquid crystal display (LCD) and touch panel (TP).If screen comprises touch panel, screen may be implemented as touch-screen, to receive the input signal from user.Touch panel comprises one or more touch sensor with the gesture on sensing touch, slip and touch panel.Described touch sensor can the border of not only sensing touch or sliding action, but also detects the duration relevant to described touch or slide and pressure.In certain embodiments, multimedia groupware 808 comprises a front-facing camera and/or post-positioned pick-up head.When terminal 800 is in operator scheme, during as screening-mode or video mode, front-facing camera and/or post-positioned pick-up head can receive outside multi-medium data.Each front-facing camera and post-positioned pick-up head can be fixing optical lens systems or have focal length and optical zoom ability.
Audio-frequency assembly 810 is configured to export and/or input audio signal.Such as, audio-frequency assembly 810 comprises a microphone (MIC), and when audio output apparatus 800 is in operator scheme, during as call model, logging mode and speech recognition mode, microphone is configured to receive external audio signal.The audio signal received can be stored in memory 804 further or be sent via communications component 816.
I/O interface 812 is for providing interface between processing components 802 and peripheral interface module, and above-mentioned peripheral interface module can be keyboard, some striking wheel, button etc.These buttons can include but not limited to: home button, volume button, start button and locking press button.
Sensor cluster 814 comprises one or more transducer, for providing the state estimation of various aspects for terminal 800.Such as, sensor cluster 814 can detect the opening/closing state of terminal 800, the relative positioning of assembly, such as described assembly is display and the keypad of terminal 800, the position of all right sense terminals 800 of sensor cluster 814 or terminal 800 1 assemblies changes, the presence or absence that user contacts with terminal 800, the variations in temperature of terminal 800 orientation or acceleration/deceleration and terminal 800.Sensor cluster 814 can comprise proximity transducer, be configured to without any physical contact time detect near the existence of object.Sensor cluster 814 can also comprise optical sensor, as CMOS or ccd image sensor, for using in imaging applications.In certain embodiments, this sensor cluster 814 can also comprise acceleration transducer, gyro sensor, Magnetic Sensor, pressure sensor or temperature sensor.
Communications component 816 is configured to the communication being convenient to wired or wireless mode between terminal 800 and other equipment.Terminal 800 can access the wireless network based on communication standard, as WiFi, 2G or 3G, or their combination.In one exemplary embodiment, communication component 816 receives from the broadcast singal of external broadcasting management system or broadcast related information via broadcast channel.In one exemplary embodiment, described communication component 816 also comprises near-field communication (NFC) module, to promote junction service.Such as, can based on radio-frequency (RF) identification (RFID) technology in NFC module, Infrared Data Association (IrDA) technology, ultra broadband (UWB) technology, bluetooth (BT) technology and other technologies realize.
In the exemplary embodiment, terminal 800 can be realized, for performing said method by one or more application specific integrated circuit (ASIC), digital signal processor (DSP), digital signal processing appts (DSPD), programmable logic device (PLD), field programmable gate array (FPGA), controller, microcontroller, microprocessor or other electronic components.
In the exemplary embodiment, additionally provide a kind of non-transitory computer-readable recording medium comprising instruction, such as, comprise the memory 804 of instruction, above-mentioned instruction can perform said method by the processor 820 of terminal 800.Such as, described non-transitory computer-readable recording medium can be ROM, random access memory (RAM), CD-ROM, tape, floppy disk and optical data storage devices etc.
Those skilled in the art, at consideration specification and after putting into practice disclosed herein disclosing, will easily expect other embodiment of the present invention.The application is intended to contain any modification of the present invention, purposes or adaptations, and these modification, purposes or adaptations are followed general principle of the present invention and comprised the undocumented common practise in the art of the present invention or conventional techniques means.Specification and embodiment are only regarded as exemplary, and true scope of the present invention and spirit are pointed out by claim below.
Should be understood that, the present invention is not limited to precision architecture described above and illustrated in the accompanying drawings, and can carry out various amendment and change not departing from its scope.Scope of the present invention is only limited by appended claim.
Claims (11)
1. eliminate a method for echo, it is characterized in that, described method comprises:
The first voice signal preset is play by local loud speaker, and the frequency response of each Frequency point in determining the first voice signal that local microphone detects;
According to the corresponding relation of the frequency response of each Frequency point prestored and the parameter value of echo cancellation parameters, and the frequency response of each Frequency point in the first voice signal of detecting of described local microphone, determine corresponding parameter value to be used;
Carry out in this locality in the process of voice communication, according to described parameter value to be used and default echo cancellation algorithm, echo cancellation process is carried out to the voice signal that local microphone in the process of described voice communication detects.
2. method according to claim 1, it is characterized in that, the corresponding relation of the frequency response of each Frequency point that described basis prestores and the parameter value of echo cancellation parameters, and the frequency response of each Frequency point in the first voice signal of detecting of described local microphone, determine corresponding parameter value to be used, comprising:
According to the corresponding relation of the default Hz-KHz of each Frequency point prestored and the parameter value of echo cancellation parameters, and the default Hz-KHz belonging to frequency response of each Frequency point in the first voice signal of detecting of described local microphone, determine corresponding parameter value to be used.
3. method according to claim 1, it is characterized in that, the corresponding relation of the frequency response of each Frequency point that described basis prestores and the parameter value of echo cancellation parameters, and the frequency response of each Frequency point in the first voice signal of detecting of described local microphone, determine corresponding parameter value to be used, comprising:
Determine the difference of the frequency response of each Frequency point and the preset reference frequency response of respective frequencies point in the first voice signal that described local microphone detects, and determine the maximum difference in described difference;
According to the corresponding relation of the parameter value of the maximum difference prestored and echo cancellation parameters, and the maximum difference determined, determine corresponding parameter value to be used.
4. method according to claim 1, is characterized in that, described method also comprises:
The second voice signal preset is play by local loud speaker, the signal strength values of target frequency point in the second voice signal that acquisition local microphone detects, if the signal strength values of described target frequency point is less than preset signal strength threshold value, then according to the difference of the signal strength values of described preset signal strength threshold value and described target frequency point, increase the gain of local microphone.
5. method according to claim 1, is characterized in that, is describedly play the first voice signal preset by local loud speaker, and the frequency response of each Frequency point in determining the first voice signal that local microphone detects, comprising:
When the change of the acceleration detecting self meet default drop condition time, display echo cancellor option;
When the echo cancellor instruction triggered by described echo cancellor option being detected, play the first voice signal preset by local loud speaker, and the frequency response of each Frequency point in determining the first voice signal that local microphone detects.
6. eliminate a device for echo, it is characterized in that, described device comprises:
First determination module, for being play the first voice signal preset by local loud speaker, and the frequency response of each Frequency point in determining the first voice signal that local microphone detects;
Second determination module, for the corresponding relation according to the frequency response of each Frequency point prestored and the parameter value of echo cancellation parameters, and the frequency response of each Frequency point in the first voice signal of detecting of described local microphone, determine corresponding parameter value to be used;
Processing module, for carrying out in the process of voice communication in this locality, according to described parameter value to be used and default echo cancellation algorithm, carries out echo cancellation process to the voice signal that local microphone in the process of described voice communication detects.
7. device according to claim 6, is characterized in that, described second determination module, for:
According to the corresponding relation of the default Hz-KHz of each Frequency point prestored and the parameter value of echo cancellation parameters, and the default Hz-KHz belonging to frequency response of each Frequency point in the first voice signal of detecting of described local microphone, determine corresponding parameter value to be used.
8. device according to claim 6, is characterized in that, described second determination module, comprising:
First determines submodule, for determining the difference of the frequency response of each Frequency point and the preset reference frequency response of respective frequencies point in the first voice signal that described local microphone detects, and determines the maximum difference in described difference;
Second determines submodule, for the corresponding relation of the parameter value according to the maximum difference prestored and echo cancellation parameters, and the maximum difference determined, determine corresponding parameter value to be used.
9. device according to claim 6, is characterized in that, described device also comprises increase module, for:
The second voice signal preset is play by local loud speaker, the signal strength values of target frequency point in the second voice signal that acquisition local microphone detects, if the signal strength values of described target frequency point is less than preset signal strength threshold value, then according to the difference of the signal strength values of described preset signal strength threshold value and described target frequency point, increase the gain of local microphone.
10. device according to claim 6, is characterized in that, described first determination module, comprising:
Display sub-module, for meet when the change of the acceleration detecting self default drop condition time, display echo cancellor option;
3rd determines submodule, for when the echo cancellor instruction triggered by described echo cancellor option being detected, the first voice signal preset is play by local loud speaker, and the frequency response of each Frequency point in determining the first voice signal that local microphone detects.
11. 1 kinds of devices eliminating echo, is characterized in that, comprising:
Processor;
For the memory of storage of processor executable instruction;
Wherein, described processor is configured to:
The first voice signal preset is play by local loud speaker, and the frequency response of each Frequency point in determining the first voice signal that local microphone detects;
According to the corresponding relation of the frequency response of each Frequency point prestored and the parameter value of echo cancellation parameters, and the frequency response of each Frequency point in the first voice signal of detecting of described local microphone, determine corresponding parameter value to be used;
Carry out in this locality in the process of voice communication, according to described parameter value to be used and default echo cancellation algorithm, echo cancellation process is carried out to the voice signal that local microphone in the process of described voice communication detects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510450913.8A CN105187594B (en) | 2015-07-28 | 2015-07-28 | A kind of method and apparatus for eliminating echo |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510450913.8A CN105187594B (en) | 2015-07-28 | 2015-07-28 | A kind of method and apparatus for eliminating echo |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105187594A true CN105187594A (en) | 2015-12-23 |
| CN105187594B CN105187594B (en) | 2018-09-04 |
Family
ID=54909432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510450913.8A Active CN105187594B (en) | 2015-07-28 | 2015-07-28 | A kind of method and apparatus for eliminating echo |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105187594B (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017143690A1 (en) * | 2016-02-26 | 2017-08-31 | 深圳Tcl数字技术有限公司 | Echo cancellation method and device for use in voice communication |
| CN107452398A (en) * | 2017-08-09 | 2017-12-08 | 深圳创维数字技术有限公司 | Echo acquisition methods, electronic equipment and computer-readable recording 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 |
| CN109360562A (en) * | 2018-12-07 | 2019-02-19 | 深圳创维－Rgb电子有限公司 | Echo cancel method, device, medium and voice awakening method and equipment |
| 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 |
| CN109979469A (en) * | 2019-04-03 | 2019-07-05 | 北京小米智能科技有限公司 | Signal processing method, equipment and storage medium |
| CN110246515A (en) * | 2019-07-19 | 2019-09-17 | 腾讯科技（深圳）有限公司 | Removing method, device, storage medium and the electronic device of echo |
| WO2020024508A1 (en) * | 2018-08-01 | 2020-02-06 | 珠海格力电器股份有限公司 | Voice information obtaining method and apparatus |
| CN111182435A (en) * | 2020-01-13 | 2020-05-19 | 北京松果电子有限公司 | Testing method and device of voice equipment |
| 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 |
| CN113488076A (en) * | 2021-06-30 | 2021-10-08 | 北京小米移动软件有限公司 | Audio signal processing method and device |
Citations (5)
| 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 |
| US20140334620A1 (en) * | 2013-05-13 | 2014-11-13 | Christelle Yemdji | Method for processing an audio signal and audio receiving circuit |
| CN104519212A (en) * | 2013-09-27 | 2015-04-15 | 华为技术有限公司 | An echo cancellation method and apparatus |
-
2015
- 2015-07-28 CN CN201510450913.8A patent/CN105187594B/en active Active
Patent Citations (5)
| 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 |
| US20140334620A1 (en) * | 2013-05-13 | 2014-11-13 | Christelle Yemdji | Method for processing an audio signal and audio receiving circuit |
| CN104519212A (en) * | 2013-09-27 | 2015-04-15 | 华为技术有限公司 | An echo cancellation method and apparatus |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017143690A1 (en) * | 2016-02-26 | 2017-08-31 | 深圳Tcl数字技术有限公司 | Echo cancellation method and device for use in voice communication |
| CN107452398A (en) * | 2017-08-09 | 2017-12-08 | 深圳创维数字技术有限公司 | Echo acquisition methods, electronic equipment and computer-readable recording medium |
| 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 |
| WO2020024508A1 (en) * | 2018-08-01 | 2020-02-06 | 珠海格力电器股份有限公司 | Voice information obtaining method and apparatus |
| 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 |
| CN109360562A (en) * | 2018-12-07 | 2019-02-19 | 深圳创维－Rgb电子有限公司 | Echo cancel method, device, medium and voice awakening method and equipment |
| 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 |
| CN109979469A (en) * | 2019-04-03 | 2019-07-05 | 北京小米智能科技有限公司 | Signal processing method, equipment and storage medium |
| 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 |
| CN110246515A (en) * | 2019-07-19 | 2019-09-17 | 腾讯科技（深圳）有限公司 | Removing method, device, storage medium and the electronic device of echo |
| 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 |
| CN111182435A (en) * | 2020-01-13 | 2020-05-19 | 北京松果电子有限公司 | Testing method and device of voice equipment |
| 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 |
| CN113488076A (en) * | 2021-06-30 | 2021-10-08 | 北京小米移动软件有限公司 | Audio signal processing method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105187594B (en) | 2018-09-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105187594A (en) | Echo canceling method and device | |
| EP3163748B1 (en) | Method, device and terminal for adjusting volume | |
| CN104902059A (en) | Call reminding method and device | |
| CN103926890A (en) | Intelligent terminal control method and device | |
| CN104363154A (en) | Smart home device control method and device | |
| CN105306718A (en) | Event prompting method and device | |
| CN104281432A (en) | Method and device for regulating sound effect | |
| CN105117211A (en) | Method and device for message prompts | |
| CN104637505A (en) | Audio playing method and device | |
| CN105511749A (en) | Method and device for equipment control | |
| CN104112459B (en) | Method and apparatus for playing audio data | |
| CN104618783A (en) | Remote control method and device | |
| CN104021148A (en) | Method and device for adjusting sound effect | |
| CN103986821A (en) | Method, equipment and system for carrying out parameter adjustment | |
| CN104636110A (en) | Method and device for controlling volume | |
| CN105138319A (en) | Event reminding method and apparatus | |
| CN105101013A (en) | Method and device for playing voice signals | |
| CN105487857A (en) | Method and apparatus for prompting image shooting part to be started | |
| CN105407368A (en) | Multimedia playing method, device and system | |
| CN105282446A (en) | Camera management method and device | |
| CN105426218A (en) | Method and device for controlling audio playing | |
| CN105391477A (en) | A communication method and device between bluetooth devices | |
| CN105511307A (en) | Control method and apparatus of electronic device | |
| CN105224171A (en) | icon display method, device and terminal | |
| CN104702756A (en) | Detecting method and detecting device for soundless call |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |