Earphone intelligent hands-free function control method

Abstract

The application discloses a kind of earphone intelligent function control methods of exempting from drawing.This application method will be respectively set left and right microphone array in two array elements left and right ear smart exempting from drawing array element, obtain left and right earphone array data;Left and right earphone array data are offset searched, and left and right delay results are obtained;The delay activation range of left and right earphone array is determined, and left and right delay results are judged, such as in range, activate the intelligent exempting from drawing function of earphone.The application uses joint judgment, when the delay of left and right array meets the condition, the judgment of intelligent exempting from drawing is completed.The application can avoid the misactivation of surrounding human voice, improve the use experience;Without pre-configuring the voiceprint information of user, and after still can normally run intelligent exempting from drawing function when switching user, to further improve the applicability and convenience of earphone.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of earphones, and particularly relates to an earphone intelligent hands-free function control method. BACKGROUND

[0002] With the popularization of noise reduction earphones, users can enjoy music quietly in noisy environments. However, too strong a noise reduction scheme also brings new problems, such as being unable to hear the conversations of people around and other sounds in the environment. In order to solve this problem, some manufacturers have introduced an intelligent hands-free function (Speak-to-chat), that is, the microphone detects in real time whether the product wearer is speaking, and if it is detected that the wearer is speaking, the music being played will be paused or muted, and the voice of the conversation object will be obtained by the microphone, so that it is easier to hear.

[0003] However, the current intelligent hands-free function only performs voice detection and cannot well distinguish whether the speaker is the wearer or the voices of people around, etc. which may be activated, resulting in a high probability of false activation in some scenes with noisy voices. For example, in office, public transportation or shopping mall, etc. public scenes, there is a high probability of false activation. In order to reduce the probability of false activation and improve the recognition rate of the wearer speaking, one method is to use the speaker's voiceprint information, but this method requires the user to configure the voiceprint information in advance, and if the voiceprint information is not recorded in advance when the user changes the earphone, the intelligent hands-free function will be disabled, resulting in poor user experience. SUMMARY

[0004] The present application proposes an earphone intelligent hands-free function control method, which uses the uniqueness of the delay of the wearer's voice arriving at the left and right earphone arrays to realize the intelligent hands-free function.

[0005] The present application method is specifically:

[0006] Step (1) sets two elements in the left microphone array of the earphone as left intelligent hands-free elements, and the two left intelligent hands-free elements form a left earphone array; when the earphone receives a signal, left earphone array data is obtained X L (n)=[ x L, 1 (n), x L,2 (n)] , represents the receiving data of one left intelligent hands-free element at time t, represents the receiving data of another left intelligent hands-free element at time t;

[0007] ​​Set two elements in the right ear microphone array in the earphone as right ear smart lift-free elements, and the two right ear smart lift-free elements constitute a right ear microphone array; when the earphone receives a signal, right ear microphone array data is obtained X R (n)=[ x R, 1 (n), x R,2 (n)] , represents the receiving data of one right ear smart lift-free element at the moment, represents the receiving data of another right ear smart lift-free element at the moment.

[0008] Step (2) offsets the left ear microphone array data X L =[ x L, 1 (n), x L,2 (n)] The left side delay result is obtained through offset search ; Specifically:

[0009] Set one of the left ear smart lift-free elements as a reference element, and offset the receiving data of the other left ear smart lift-free element, the offset amount , is the distance between the two left ear smart lift-free elements, is the speed of sound, is the incident angle, that is, the angle between the sound incident direction and the line connecting the two left ear smart lift-free elements, θ ∈[ 0° , 180° ] The left ear microphone array data after offset is obtained ;

[0010] The covariance matrix about the incident angle is calculated , the eigenvalue decomposition of the covariance matrix is performed, two eigenvalues and corresponding two eigenvectors are obtained, the two eigenvalues are sorted from large to small, and the corresponding two eigenvectors constitute a matrix U L = [ u L, 1 ， u L,2 ] , is the eigenvector corresponding to the large eigenvalue, For the eigenvector corresponding to the small eigenvalue, the superscript represents the conjugate transpose;

[0011] The incident angle is within , the calculation cost , the maximum cost The incident angle corresponding to the value is the target incident angle , and the target delay .

[0012] For the right earphone array data X R =[ x R, 1 (n), x R,2 (n)] The right delay result is obtained by offset search , and the method is the same as that of the left delay result.

[0013] Step (3) determines the delay activation range of the left earphone array [τ L−low , τ L−high ] and the delay activation range of the right earphone array [τ R−low , τ R−high ] When and , the intelligent hands-free function of the earphone is activated.

[0014] A sphere with a radius of is set, ; , ; wherein the set parameter , , is the arc length of the circle with a central angle of , and the central angle is set.

[0015] The beneficial effects of the present application are: the intelligent hands-free function is realized by the delay uniqueness and certainty of the wearer's voice reaching the left earphone array and the right earphone array, the misactivation of the surrounding human voice can be effectively avoided, and the voiceprint information of the wearer is not required, and better earphone use experience can be achieved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is the flowchart of the present application; ​

[0017] Figure 2 Schematic diagram of the sound incident angle in the present invention. DETAILED DESCRIPTION

[0018] To facilitate understanding of the present invention, and to make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth in order to fully understand the present invention, and preferred embodiments of the present invention are shown in the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of the present invention. The present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited to the specific embodiments disclosed below.

[0019] A method for controlling the intelligent free-removal function of earphones, such as Figure 1 , as follows:

[0020] Step (1) sets two elements in the left ear microphone array in the headset as the left ear intelligent non-removal array elements, and the two left ear intelligent non-removal array elements constitute the left ear microphone array; when the headset receives the signal, the left ear microphone array data is obtained. X L (n)=[ x L, 1 (n), x L,2 (n)] , express The data received by a left-ear intelligent free-to-remove array element at all times, express At any moment, the other left ear smart free-to-remove array element receives data.

[0021] Set the two elements in the right ear microphone array in the headset as the right ear smart free-removal array elements, and the two right ear smart free-removal array elements constitute the right ear microphone array; when the headset receives the signal, the right ear microphone array data is obtained X R (n)=[ x R, 1 (n), x R,2 (n)] , express The data received by a right-ear intelligent free-to-remove array element at all times, express At any moment, the other right ear smart free-to-remove array element receives data.

[0022] Step (2) for the left earphone array data X L =[ x L, 1 (n), x L,2 (n)] By searching for the offset, we can get the delay result on the left. Specifically:

[0023] like Figure 2 , set one of the left ear smart free-removal array elements A as the reference array element, and offset the data received by the other left ear smart free-removal array element B. , The distance between the two left-ear smart free-removal array elements, , The speed of sound is 340m / s, is the incident angle, that is, the angle between the incident direction of the sound and the line connecting the two left-ear smart free-removal array elements. θ ∈[ 0° , 180° ] , get the left earphone array data after offset .

[0024] Calculate the angle of incidence The covariance matrix of , for the covariance matrix Perform eigenvalue decomposition to obtain two eigenvalues ​​and corresponding two eigenvectors, sort the two eigenvalues ​​from large to small, and the corresponding two eigenvectors form a matrix U L = [ u L, 1 ， u L,2 ] , is the eigenvector corresponding to the large eigenvalue, is the eigenvector corresponding to the small eigenvalue, and the superscript represents the conjugate transpose.

[0025] For incident angle exist Traverse the interval and calculate the cost , the maximum cost The incident angle corresponding to the value The target incident angle , then the target delay .

[0026] For the right earphone array data X R =[ x R, 1 (n), x R,2 (n)] By searching for the offset, we can get the delay result on the right. , specifically:

[0027] Set one of the right ear smart free-removal array elements as the reference array element, and offset the data received by the other right ear smart free-removal array element. , The distance between the two right-ear smart free-removal array elements, , the incident angle θ ∈[ 0° , 180° ] , get the right earphone array data after offset ;

[0028] Calculate the angle of incidence The covariance matrix of , for the covariance matrix Perform eigenvalue decomposition to obtain two eigenvalues ​​and corresponding two eigenvectors, sort the two eigenvalues ​​from large to small, and the corresponding two eigenvectors form a matrix U R = [ u R, 1 ， u R,2 ] , is the eigenvector corresponding to the large eigenvalue, is the eigenvector corresponding to the small eigenvalue;

[0029] For incident angle exist Traverse the interval and calculate the cost , the maximum cost The incident angle corresponding to the value The target incident angle , then the target delay .

[0030] Step (3) Determine the delayed activation range of the left earphone array [τ L−low , τ L−high ] and the delayed activation range of the right headset array [τ R−low , τ R−high ] ,when and At this time, the smart hang-up free function of the earphone is activated.

[0031] A sphere with a radius of is set, ; , ; wherein, the parameter , , is set as an arc length of a circle with a central angle of , and the central angle is set as .

[0032] In this embodiment, the parameter is set as , and then ; the parameter is set as , and then , . When the parameters and obtained in step (2) satisfy and at the same time, the smart hang-up free function of the earphone is activated.

[0033] It should be understood that the above-described embodiments are merely specific embodiments of the present application, which are used to illustrate the technical solutions of the present application, rather than limit the present application, and the protection scope of the present application is not limited thereto.

Claims

1. An earphone intelligent hands-free function control method, characterized in that, comprising the steps of: Step (1) sets two array elements in the left ear microphone array in the earphone as left ear smart hands-free array elements, and the two left ear smart hands-free array elements constitute a left ear microphone array; when the earphone receives a signal, left ear microphone array data is obtained , represents the reception data of one left ear smart hands-free array element at the moment, represents the reception data of another left ear smart hands-free array element at the moment; Set two array elements in the right ear microphone array in the earphone as right ear smart lift-free array elements, and the two right ear smart lift-free array elements constitute a right ear microphone array; when the earphone receives a signal, right ear microphone array data is obtained , denotes the receiving data of one right ear smart lift-free array element at the moment, denotes the receiving data of another right ear smart lift-free array element at the moment; Step (2) on left side headset array data Left side delay result by offset search ; For right side headset array data Right side delay result is obtained by offset search ; Step (3) determines the delay activation range of the left headset array and the delay activation range of the right headset array When and , the intelligent hands-free function of the headset is activated. First, set a sphere with a radius of , ; then , ; where the parameter , , is the arc length of a circle with a central angle of , , and the central angle is set.

2. The earpiece intelligent drop-free function control method of claim 1, wherein, The left side delay result The specific method is as follows: Set one of the left ear smart hands-free array elements as a reference array element, offset the data received by the other left ear smart hands-free array element, and the offset is , the distance between the two left ear smart hands-free array elements, the speed of sound, the incident angle, that is, the included angle between the sound incident direction and the line connecting the two left ear smart hands-free array elements, , get the left earphone array data after offset ; Computing the covariance matrix with respect to the incidence angle , performing eigenvalue decomposition on the covariance matrix , obtaining two eigenvalues and corresponding two eigenvectors, sorting the two eigenvalues from large to small, and the corresponding two eigenvectors form a matrix , is the eigenvector corresponding to the large eigenvalue, is the eigenvector corresponding to the small eigenvalue, and the superscript represents the conjugate transpose; The incident angle In The interval is traversed, and the cost is calculated , the maximum cost The incident angle corresponding to the value That is, the target incident angle Then the target delay .

3. The method of claim 1, wherein the control of the intelligent drop function of the earphone is performed by a user's voice command. The right side delay result The specific method is as follows: Set one of the right ear smart hands-free array elements as a reference array element, offset the data received by the other right ear smart hands-free array element, and the offset is , The distance between the two right ear smart hands-free array elements is d, The sound speed is c, The incident angle is θ, that is, the angle between the sound incident direction and the line connecting the two right ear smart hands-free array elements, , get the offset right earphone array data ; Computing the covariance matrix with respect to the incidence angle , performing eigenvalue decomposition on the covariance matrix , obtaining two eigenvalues and corresponding two eigenvectors, sorting the two eigenvalues from large to small, and the corresponding two eigenvectors form a matrix , is the eigenvector corresponding to the large eigenvalue, is the eigenvector corresponding to the small eigenvalue, and the superscript represents the conjugate transpose; The incident angle In The interval is traversed, and the cost is calculated The maximum cost The incident angle corresponding to the value That is, the target incident angle The target delay .

Images