WO2019114397A1

WO2019114397A1 - Microphone neck ring earphone

Info

Publication number: WO2019114397A1
Application number: PCT/CN2018/110269
Authority: WO
Inventors: 刘�东; 陈运基
Original assignee: 安克创新科技股份有限公司
Priority date: 2017-12-13
Filing date: 2018-10-15
Publication date: 2019-06-20
Also published as: CN108235165B; CN108235165A

Abstract

Disclosed in the present application is a microphone neck ring earphone, comprising a neck ring and an earphone main body, wherein the neck ring comprises: a first microphone array disposed at a first end part of the neck ring and a second microphone array disposed at a second end part of the neck ring; the position of the first end part is opposite to the position of the second end part; both the first microphone array and the second microphone array comprise at least two microphones; the first microphone array picks up a first voice signal around the first microphone array and the second microphone array picks up a second voice signal around the second microphone array; a processor is connected to the first microphone array and the second microphone array respectively, and is used for receiving the first voice signal and the second voice signal and determining deviation of the head of a user according to the first voice signal and the second voice signal, thereby using the microphone array close to the head of the user as a pick-up main body. By means of the microphone neck ring earphone, influence on a conversation caused by environment noises may be reduced.

Description

Microphone neck ring earphone

[Technical Field]

The present application relates to the field of earphone technology, and in particular to a microphone neck ring earphone.

【Background technique】

With the continuous development of science and technology, the use of headphones is increasing.

The earphone is a conversion unit for receiving the electrical signal from the media player, and then converting it into an audible sound wave by using a speaker close to the ear, and independently listening to the sound without affecting others.

The inventors of the present application have found in long-term research that people tend to be in an unquiet environment during a call, such as a market, a factory, or a vehicle. The noise of these public places often causes the headphones to transmit voice signals. At the beginning, the voice signal at the source is unclear, which seriously affects the quality of the call and the user experience.

[Summary of the Invention]

The technical problem mainly solved by the present application is to provide a microphone neck ring earphone capable of obtaining a clear voice signal during a call.

In order to solve the above technical problem, a technical solution adopted by the present application is to provide a microphone neck ring earphone, the microphone neck ring earphone includes: a neck ring and a headphone body, when the microphone neck ring earphone is normally worn, The neck ring is worn on the neck of the user, the earphone body being worn in the ear of the user, wherein the neck ring includes: a first microphone array disposed at the first end of the neck ring, the first A microphone array includes at least two microphones for picking up a first voice signal around the first microphone array; a second microphone array disposed at a second end of the neck ring, the first end The second end portion is opposite in position, the second microphone array includes at least two microphones for picking up a second voice signal around the second microphone array; a processor, respectively, and the first microphone array and a second microphone array connection, configured to receive a first voice signal sent by the first microphone array and a second voice signal sent by the second microphone array, and according to the A first bias signal and the second speech speech signal determining the user's head, the microphone array close to the user's head as the pickup body.

The beneficial effects of the present application are: different from the prior art, the microphone neck ring earphone of the present application includes a neck ring and a headphone body, and when the microphone neck ring earphone is normally worn, the neck ring is worn on the neck of the user. The earphone body is worn in the user's ear, wherein the neck ring includes: a first microphone array disposed at the first end of the neck ring, the first microphone array including more than two microphones for picking up the first microphone array a first first voice signal; a second microphone array disposed at a second end of the neck ring, the first end being opposite the second end, the second microphone array comprising more than two microphones for picking a second voice signal around the two microphone arrays; the processor is coupled to the first microphone array and the second microphone array, respectively, for receiving the first voice signal sent by the first microphone array and the second voice signal sent by the second microphone array And determining the bias of the user's head according to the first voice signal and the second voice signal, and using the microphone array close to the user's head as the pickup body With this headset, it is possible to ensure that the user during a call, when the head is turned to the side or toward, clear voice signal is obtained, to reduce the influence of ambient noise on the call.

[Description of the Drawings]

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present application. Other drawings may also be obtained from those of ordinary skill in the art in light of the inventive work. among them:

1 is a schematic view showing the internal structure of an embodiment of a microphone neck ring earphone of the present application;

2 is a schematic structural view of a neck ring in the microphone neck ring earphone of FIG. 1;

3 is an enlarged schematic view showing the first end of the microphone neck ring earphone of FIG. 1 in an application scenario;

4 is a schematic view of the microphone neck ring earphone of FIG. 1 when it is normally worn in an application scenario;

FIG. 5 is a schematic diagram of the internal structure of another embodiment of the microphone neck ring earphone of the present application.

【Detailed ways】

1 and FIG. 2, FIG. 1 is a schematic diagram showing the internal structure of an embodiment of a microphone neck ring earphone of the present application, and FIG. 2 is a schematic structural view of a neck ring of the microphone neck ring earphone of FIG.

In the present embodiment, the microphone neck ring earphone includes: a neck ring 10 and a headphone body (not shown). When the microphone neck ring earphone is normally worn, the neck ring 10 is worn on the neck of the user, and the earphone main body is worn. In the user's ear, optionally, the neck ring 10 and the earphone body are connected by wires (not shown).

The neck ring 10 includes a first microphone array 11 , a second microphone array 12 , and a processor 13 .

The first microphone array 11 is disposed at the first end 1 of the neck ring 10 for picking up a first voice signal around the first microphone array 11, wherein the first voice signal includes both the sound signal emitted by the user during the call. The sound signal is a useful signal that needs to be processed and transmitted by the microphone neck ring earphone, and includes a noise signal of the surrounding environment of the user during the call, and in the embodiment, the first microphone array 10 includes at least two microphones 111. The microphone 111 is an energy conversion device that converts a sound signal into an electrical signal, and is capable of picking up an input voice signal. Specifically, the number of the microphones 111 may be two or three, or even more.

The second microphone array 12 is disposed at the second end 2 of the neck ring 10, and the first end portion 1 is opposite to the second end portion 2, specifically, when the microphone neck ring earphone is normally worn, the first end portion 1 and the second end 2 are located on different sides of the user's mouth. Similarly, the second microphone array 12 also includes at least two microphones 111 for picking up a second voice signal around the second microphone array 12, optionally The second microphone array 12 is the same number as the microphone 111 in the first microphone array 11.

The processor 13 is connected to the first microphone array 11 and the second microphone array 12, respectively, for receiving the first voice signal sent by the first microphone array 11 and the second voice signal sent by the second microphone array 12, and according to the first voice. The signal and the second speech signal determine the bias of the user's head, with the microphone array close to the user's head as the pickup body. Wherein, the microphone array close to the user's head is used as the sound pickup body: the voice signal picked up by the microphone array close to the user's head is taken as the main signal, and the voice signal picked up by the microphone array far away from the user's head is used as the reference signal. Compensating the main signal with the reference signal to obtain the final transmitted speech signal. Specifically, the processor 13 uses the data of the speech signal picked up by the microphone array close to the user's head as the main data to keep away from the user's head. The data of the voice signal picked up by the microphone array is reference data, and is processed by referring to the data compensation correction main data to obtain a final transmitted voice signal, for example, when the first microphone array 11 is closer to the user's head than the second microphone array 12. When the data of the first voice signal: phase, intensity, frequency band, etc. is the main data, the data of the second voice signal: phase, intensity, frequency band, etc. are used as reference data, and the reference data is used for the first voice signal. The various data are compensated and corrected to compensate the corrected first speech signal The final delivery of the speech signal. Among them, the compensation correction includes: strengthening the signal strength of the sound signal frequency band, reducing the signal strength of the noise frequency band, and the like.

Generally speaking, during the conversation, the user will inevitably turn or shake the head, and it is difficult to maintain the position in the center between the first end 1 and the second end 2 of the microphone neckphone, even in some noisy In the environment, the user deliberately prefers to talk to a certain side. At this time, the voice signal picked up by the microphone array near the user's head side is clearer, and the noise component is less, and the language picked up from the microphone array on the user's head side is in a language. There are many noise components in the signal, and the signal-to-noise ratio is relatively small. In the prior art, the speech signal picked up by the microphones on both sides is generally processed in the same proportion to obtain the final transmitted speech signal, and then the speech signal finally obtained at this time has more noise components, and the signal-to-noise ratio is relatively small. It is easy to cause a drop in call quality. In the present embodiment, the microphone array close to the user's head is used as the sound pickup body, which can reduce the influence of environmental noise on the call, improve the signal-to-noise ratio of the voice signal, and obtain a clear voice signal.

Optionally, in an application scenario of the embodiment, the processor 13 determines the head bias of the user according to the signal strengths of the first voice signal and the second voice signal, specifically, the microphone array that is close to the user's head. The signal strength of the voice signal is greater than the signal strength of the voice signal picked up by the microphone array away from the user's head. Therefore, if the signal strength of the first voice signal is greater than the signal strength of the second voice signal, it is determined that the user's head is biased toward the first The microphone array 11 determines that the user's head is biased toward the second microphone array 12 if the intensity of the second voice signal is greater than the signal strength of the first voice signal.

Optionally, in another application scenario of the embodiment, the processor 13 determines the user's head bias according to the phases of the first voice signal and the second voice signal, specifically, the microphone array that is far away from the user's head. The phase of the speech signal lags behind the phase of the speech signal picked up by the microphone array near the user's head, so if the phase of the second speech signal lags behind the phase difference of the first speech signal, it is determined that the user's head is biased toward the first microphone The array 11 determines that the user's head is biased toward the second microphone array 12 if the phase of the first speech signal lags behind the phase of the first speech signal.

Of course, in other application scenarios, the signal strength and phase of the first voice signal and the signal strength and phase of the second voice signal may be combined to determine the bias of the user's head, and details are not described herein.

Referring to FIG. 3, FIG. 3 is an enlarged schematic view of the first end portion 1 in an application scenario of the present embodiment. In the application scenario, the first microphone array 11 includes a first microphone 112 and a second microphone 113, and the neck is When the ring earphone is normally worn, the distance between the first microphone 112 and the user's mouth is smaller than the distance between the second microphone 113 and the user's mouth, that is, the first microphone 112 is closer to the user's mouth than the second microphone 113. unit.

In this application scenario, the processor 13 is further configured to cancel the noise signal in the first microphone voice signal picked up by the first microphone 112 according to the second microphone voice signal picked up by the second microphone 113.

Specifically, since the first microphone array 11 includes at least two microphones, different microphones pick up different voice signals, that is, the first voice signal includes a plurality of sub-speech signals, so the first microphone 112 near the user's mouth is mainly For picking up the sound signal emitted by the user, the second microphone 113 remote from the user's mouth is mainly used for picking up the noise signal, and when the processor 13 receives the first voice signal, the first microphone voice can be picked up according to the first microphone 112. The phase difference, the frequency band, the waveform variation law, and the like between the signal and the second microphone voice signal picked up by the second microphone 113 are used to eliminate the noise signal in the first microphone voice signal to reduce the influence of environmental noise on the call.

It is to be understood that the processor 13 is further configured to process the sub-speech signals in the second voice signal picked up in the second microphone array 12. The processing method is the same as or similar to the above method, and details are not described herein again.

Optionally, the processor 13 is a digital signal processor, and the digital signal processor may be a highly integrated chip with high processing capability for receiving, determining, and processing the first voice signal and the second voice signal. Etc. In order to facilitate processing of the first speech signal and the second speech signal, the digital signal processor is further configured to pre-process the first speech signal and the second speech information respectively. Specifically, the pre-processing comprises: filtering Steps of sampling, quantification, etc., of course, in different implementation manners, the pre-processing may further include: windowing, endpoint detection, pre-emphasis, and the like, and no limitation is imposed herein.

Optionally, the processor 13 is further configured to locate a user's head according to parameters such as a signal strength, a signal-to-noise ratio, a phase difference, and the like of the first voice signal and the second voice signal, specifically, according to the first voice signal. a signal to noise ratio, a signal to noise ratio of the second speech signal, a relative signal to noise ratio of the first speech signal and the second speech signal, a signal intensity ratio of the first speech signal and the second speech signal, a first speech signal, and a second speech The phase difference ratio of the signal is obtained, and the signal weight calculation matrix is obtained, and the signal weight calculation matrix and the algorithm are further used to calculate the approximate angle of the user's head bias, so as to achieve the purpose of positioning the user's head, thereby being able to more accurately combine the first The speech signal and the second speech signal result in a speech signal that ultimately needs to be delivered.

Optionally, the processor 13 is further configured to locate the noise source according to the first voice signal and the second voice signal, and increase the volume in the earplugs near the direction of the noise source, and decrease in the earplugs away from the direction of the noise source. volume.

Specifically, the frequency bands of the respective signals received by the microphones 111 in the respective arrays of the first microphone array 11 and the second microphone array 12 and the variation laws of the respective signal waveforms obtain respective noises in the second voice signals of the first voice signal. Signal, and further locate the noise source according to the signal strength, phase difference and other parameters of the noise signal, wherein the preliminary direction of the noise source can be determined according to the signal strength of the noise signal, and then combined with the phase difference, the algorithm is used to measure the noise. The source is positioned, and the volume is increased in the earplugs close to the noise source direction, and the volume is reduced in the earplugs away from the noise source to ensure that the signal intensity heard on both sides of the user is the same, and the user hears the balanced sound.

The processor 13 is further configured to determine a surrounding noise intensity according to the first voice signal and the second voice signal. When determining that the noise intensity is greater than the noise threshold, the processor performs a noise cancellation process on the first voice signal and the second voice signal.

In this application scenario, according to the signal strength of the noise signal in the first voice signal picked up by the first microphone array 11, the signal strength of the noise signal in the second voice signal picked up by the second microphone array 12 obtains the surrounding noise intensity. Therefore, when the processor 13 determines that the noise intensity is greater than the noise threshold, the first speech signal and the second speech signal are denoised to improve the signal-to-noise ratio of the first speech signal and the second speech signal, thereby recombining The first speech signal and the second speech signal are processed to obtain a speech signal that needs to be finally transmitted to reduce the influence of environmental noise on the call.

In general, when the noise intensity is greater than the noise threshold, the noise has a greater influence on the first speech signal and the second speech signal, which may result in a larger signal-to-noise ratio of the finally obtained speech signal, affecting the call quality, and specific noise. The threshold value can be set by the designer according to the analysis and statistics of a large amount of experimental data, and no specific limitation is imposed here.

Referring to FIG. 4, FIG. 4 is a schematic diagram of the microphone neck ring earphone of FIG. 1 when it is normally worn in an application scenario.

When the microphone more neck ring earphone is normally worn, the first microphone array 11 and the second microphone array 12 are located between the mouth and the chest of the user to ensure that the first microphone array 11 and the second microphone array 12 are close to the user's mouth. For better picking up the first speech signal and the second speech signal.

Referring to FIG. 5, FIG. 5 is a schematic diagram of an internal structure of another embodiment of a microphone neck ring earphone according to the present application. In this embodiment, the microphone neck ring earphone further includes: a Bluetooth module 25.

The Bluetooth module 25 is connected to the processor 23 for linking and pairing with other electronic devices, such as smart phones, tablets, etc., and receiving audio signals transmitted by other electronic devices and transmitting audio signals obtained by the microphone neck ring headphones to other electronic devices. The device transmits data wirelessly between the microphone neckphone and other electronic devices.

In summary, different from the prior art, the microphone neck ring earphone of the present application uses a microphone array close to the user's head as a pickup body to ensure that the user gets clear when the head is biased or turned to one side during the conversation. The voice signal reduces the impact of ambient noise on the call.

The above description is only the embodiment of the present application, and thus does not limit the scope of the patent application, and the equivalent structure or equivalent process transformation of the specification and the drawings of the present application, or directly or indirectly applied to other related technologies. The fields are all included in the scope of patent protection of this application.

Claims

A microphone neck ring earphone includes a neck ring and a headphone body, the neck ring being worn on a neck of a user when the microphone neck ring earphone is normally worn, the earphone body being worn in a user's ear, Characterized in that the neck ring comprises:

a first microphone array disposed at a first end of the neck ring, the first microphone array including at least two microphones for picking up a first voice signal around the first microphone array;

a second microphone array disposed at a second end of the neck ring, the first end being opposite the position of the second end, the second microphone array comprising at least two microphones for picking up a second voice signal around the second microphone array;

The processor is connected to the first microphone array and the second microphone array, respectively, for receiving a first voice signal sent by the first microphone array and a second voice signal sent by the second microphone array, and Determining the bias of the user's head according to the first voice signal and the second voice signal, and taking the microphone array close to the user's head as the sound pickup body.
The microphone neck ring earphone according to claim 1, wherein the microphone array close to the user's head is used as a pickup body, and includes:

The voice signal picked up by the microphone array close to the user's head is taken as the main signal, and the voice signal picked up by the microphone array far away from the user's head is used as a reference signal, and the reference signal is used to compensate for the correction of the main signal.
The microphone neck ring earphone according to claim 1, wherein the determining the bias of the user's head according to the first voice signal and the second voice signal comprises:

Determining a signal strength of the first voice signal and the second voice signal, and if a signal strength of the first voice signal is greater than a signal strength of the second voice signal, determining that a user's head is biased toward the first a microphone array, if the signal strength of the second voice signal is greater than the signal strength of the first voice signal, determining that the user's head is biased toward the second microphone array.
The microphone neck ring earphone according to claim 1, wherein the determining the bias of the user's head according to the first voice signal and the second voice signal comprises:

Determining a phase of the first voice signal and the second voice signal, if a phase of the first voice signal lags behind a phase of the second voice signal, determining that a user's head is biased toward the second microphone And if the phase of the second speech signal lags behind the phase of the first speech signal, determining that the user's head is biased toward the first microphone array.
A microphone neck ring earphone according to claim 1, wherein

The first microphone array and the second microphone array are located between the user's mouth and chest when the microphone neck ring earphone is properly worn.
A microphone neck ring earphone according to claim 1, wherein

The processor is a digital signal processor, and the digital signal processor is further configured to preprocess the first voice signal and the second voice information, respectively.

The preprocessing includes filtering, sampling, and quantization.
The microphone neck ring earphone according to claim 1, wherein the first microphone array comprises a first microphone and a second microphone, the first microphone and the user when the microphone neck ring earphone is normally worn The distance between the mouths is less than the distance between the second microphone and the user's mouth.
A microphone neck ring earphone according to claim 7, wherein

The processor is further configured to cancel a noise signal in the first microphone voice signal picked up by the first microphone according to the second microphone voice signal picked up by the second microphone.
A microphone neck ring earphone according to claim 1, wherein

The processor is further configured to locate a noise source according to the first voice signal and the second voice signal, and increase a volume in an earplug near a direction in which the noise source is located, away from the direction of the noise source. Reduce the volume in the earbuds.
A microphone neck ring earphone according to claim 1, wherein

The processor is further configured to determine a surrounding noise intensity according to the first voice signal and the second voice signal, where the processor is to the first voice signal and when determining that the noise intensity is greater than a noise threshold The second voice signal performs a noise canceling process.