CN207382519U - A kind of neck ring bluetooth headset - Google Patents
A kind of neck ring bluetooth headset Download PDFInfo
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- CN207382519U CN207382519U CN201721412820.7U CN201721412820U CN207382519U CN 207382519 U CN207382519 U CN 207382519U CN 201721412820 U CN201721412820 U CN 201721412820U CN 207382519 U CN207382519 U CN 207382519U
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Abstract
The utility model provides a kind of neck ring bluetooth headset, and the earphone includes the headset earpiece that the annular supporting structure with opening is connected with the earphone cable stretched out by the annular supporting structure；It is set in the middle part of the annular supporting structure towards outside auxiliary Mike and the described second main Mike is installed in installation towards the first inside main Mike or on the earphone cable in one end of the annular supporting structure opening.The utility model neck ring bluetooth headset can effectively eliminate ambient noise and other people spoken sounds, reach better noise reduction, call environment is made more to clean.
Description
Technical field
The utility model relates to bluetooth noise cancelling headphone technical field, more particularly to a kind of neck ring bluetooth headset.
Background technology
With social progress and the raising of living standards of the people, earphone essential life use in having become for people's lives
Product.People are usually in street, bus, and subway is answered and called, the noise in this kind of environment, can be by the call of earphone
The content that microphone is picked up and near-end is spoken is mixed together, is sent to by uplink in the receiver of remote phone, is influenced distal end and is connect
The voice quality answered a call, therefore uplink noise reduction technology is particularly useful.Speech enhan-cement in call is big all the time
Amount concern the problem of, in noisy environment, how to allow distal end telephone user can not hear near-end speaker information to be expressed,
Inhibit noise, be an of great value research point.
Typically now although preferable noise reduction, bluetooth can also be reached using diamylose gram noise reduction schemes on mobile phone
The convenience of earphone makes many users be ready to be conversed or listened to music with earphone, so the noise reduction on earphone has very urgent need
It asks.Current common bluetooth headset does not have uplink decrease of noise functions substantially, and uplink call is generally using single Mike's decrease of noise functions, noise reduction
Ability is limited, only good to stationary noise effect, and the effect for inhibiting other noises in environment is poor.In market, beaten in the environment such as subway
Phone except ambient noise, is mingled with the sound of other tellers beyond earphone user in the sound that distal end telephone user hears
Sound, noise reduction are very poor.In the prior art, tonequality can be promoted due to being filtered to the useful signal in auxiliary microphone, however
Full frequency band integrally filters while can change the ambient noise in auxiliary microphone, the ambient noise in auxiliary microphone to be caused to believe
Number and main microphon in ambient noise signal difference it is excessive, influence noise reduction.
Therefore, to solve the above-mentioned problems, it is desirable to be able to effectively eliminate people around's spoken sounds, reach better noise reduction effect
Fruit makes a kind of more clean neck ring bluetooth headset of call environment.
Utility model content
The purpose of this utility model is to provide a kind of neck ring bluetooth headset, the earphone includes the annular branch with opening
The headset earpiece that support structure is connected with the earphone cable stretched out by the annular supporting structure；
It is set in the middle part of the annular supporting structure towards outside auxiliary Mike and is opened in the annular supporting structure
First main Mike is installed or the second main Mike is installed on the earphone cable in one end of mouth.
Preferably, the described first main Mike installs in the end of one end of the annular supporting structure opening.
Preferably, the described first main Mike installs in one end of the annular supporting structure opening towards inside.
Preferably, one end of the annular supporting structure opening is also installed towards the 3rd inside main Mike.
Preferably, earphone cable is stretched out in the annular supporting structure both sides respectively.
Preferably, arrangement noise reduction system inside the annular supporting structure.
Neck ring formula bluetooth headset provided by the utility model, by main Mike with aiding in Mike by neck ring structure in remote
It separates, the voice signal for making main Mike's acquisition is more accurate, and the judgement of wearer's spoken sounds, while this can be effectively performed
Utility model uses annular supporting structure, and what user can be more convenient uses earphone, without in use to earphone
Line is adjusted.
It should be appreciated that foregoing description substantially and follow-up description in detail are exemplary illustration and explanation, it should not
As the limitation to the claimed content of the utility model.
Description of the drawings
With reference to the attached drawing of accompanying, the more purposes of the utility model, function and advantage will pass through the utility model embodiment party
The described below of formula is illustrated, wherein：
Fig. 1 diagrammatically illustrates the structure diagram of neck ring bluetooth headset in the utility model one embodiment；
Fig. 2 shows the structure diagram of neck ring bluetooth headset in another embodiment of the utility model；
Fig. 3 shows the structure diagram of neck ring bluetooth headset in the utility model further embodiment；
Fig. 4 shows the structure diagram of neck ring bluetooth headset in another embodiment of the utility model；
Fig. 5 shows the overall structure block diagram of the noise reduction system of the utility model neck ring bluetooth headset；
Fig. 6 shows that the utility model voice data judging unit judges the flow diagram of the voice signal of wearer；
Fig. 7 shows that the utility model filter unit carries out noise signal the flow diagram of multi-subband time-domain filtering；
Fig. 8 shows the flow diagram of noise suppressed in the utility model voice signal.
Specific embodiment
By reference to exemplary embodiment, the purpose of this utility model and function and these purposes and function are used to implement
Method will be illustrated.However, the utility model is not limited to exemplary embodiment as disclosed below；It can be by not
It is realized with form.The essence of specification is only to aid in various equivalent modifications Integrated Understanding the utility model
Detail.Below by neck ring bluetooth headset of the specific embodiment to the offer of the utility model, neck ring bluetooth headset
Noise reduction system and noise-reduction method provide detailed embodiment, neck ring earphone refer to by earphone by be placed on wearer's volume neck into
Row call or the bluetooth headset of music.The structure of neck ring bluetooth headset in the utility model one embodiment as shown in Figure 1
Schematic diagram, neck ring bluetooth headset includes annular supporting structure 100 with opening and by annular supporting structure 100 in the present embodiment
The headset earpiece (not shown) that the earphone cable 102 of stretching connects.It is set at 100 middle part of annular supporting structure towards outside (B
Side) auxiliary Mike 103 and in one end (a ends) that annular supporting structure 100 is open installation towards the first of inside (A sides)
Main Mike 101.Neck ring bluetooth headset is worn on neck by wearer, and the sound of wearer's speech is gathered by the first main Mike 101
Sound signal, by the way that Mike 103 is aided in gather ambient noise.According to the utility model, by main Mike and auxiliary Mike in embodiment
It is separated by neck ring structure in remote, the voice signal for making main Mike's acquisition is more accurate, and wearer can be effectively performed
The judgement of spoken sounds and more efficiently noise reduction is carried out to wearer's voice signal.
The structure diagram of neck ring bluetooth headset in another embodiment of the utility model as shown in Figure 2, in the present embodiment
The earphone cable 102 that neck ring bluetooth headset includes the annular supporting structure 100 with opening and stretched out by annular supporting structure 100 connects
The headset earpiece (not shown) connect.At 100 middle part of annular supporting structure, the auxiliary Mike 103 towards outside (B sides) is set,
And the second main Mike 104 is installed on earphone cable 102.Neck ring bluetooth headset is worn on neck by wearer, passes through the second master
Mike 104 gathers wearer's voice signal, by the way that Mike 103 is aided in gather ambient noise.It is real according to the utility model
It applies main Mike in example with aiding in Mike by neck ring structure in separating at a distance, the voice signal for making main Mike's acquisition is more accurate
Really, the judgement of wearer's spoken sounds can be effectively performed and more efficiently noise reduction is carried out to wearer's voice signal.
The structure diagram of neck ring bluetooth headset in the utility model further embodiment as shown in Figure 3；First main Mike
101 install in the end at one end of annular supporting structure opening (a ends).
The structure diagram of neck ring bluetooth headset in another embodiment of the utility model as shown in Figure 4, in the present embodiment
The earphone cable 102 that neck ring bluetooth headset includes the annular supporting structure 100 with opening and stretched out by annular supporting structure 100 connects
The headset earpiece (not shown) connect.At 100 middle part of annular supporting structure, the auxiliary Mike 103 towards outside (B sides) is set,
And the first main Mike 101 in one end (a ends) that annular supporting structure 100 is open installation direction inside (A sides).The present embodiment
In, also install the 3rd main Mike 105 towards inside (A sides) for one end (a ends) that annular supporting structure 100 is open, and passes through first
Main 101 and the 3rd main Mike 105 of Mike gathers wearer's voice signal respectively, and voice signal is divided into two-way drops
It makes an uproar processing, detailed description is given below in specific noise reduction process.It carries out wearer and neck ring bluetooth headset is worn on neck,
Wearer's voice signal is gathered by the first main Mike 101, by the way that Mike 103 is aided in gather ambient noise.According to this
Utility model, in embodiment by main Mike and auxiliary Mike by neck ring structure in separating at a distance, the sound for gathering main Mike
Sound signal is more accurate, and the judgement of wearer's spoken sounds can be effectively performed and wearer's voice signal is carried out more
For effective noise reduction.
In some embodiments, earphone cable is stretched out in annular supporting structure both sides respectively, is listened for wearer's left-right ear use
Cylinder.Neck ring bluetooth headset provided by the utility model, arranges noise reduction system inside annular supporting structure.
Below to the judgement of neck ring bluetooth headset wearer's spoken sounds in above-described embodiment and the noise reduction of voice signal
Process is described in detail, due to main Mike (the first main Mike, the second main Mike or the first main Mike and the 3rd main Mike)
When gathering wearer's voice signal, ambient noise and surrounding other staff speech are inevitably collected
Sound, while Mike is aided in inevitably to collect wearer's voice signal.According to the utility model to above-mentioned
Noise and wearer's surrounding people's voice signal are inhibited, to reach the drop to wearer's voice signal
It makes an uproar.The utility model is illustrated for the noise reduction system of neck ring bluetooth headset first, the utility model neck ring as shown in Figure 5
The overall structure block diagram of the noise reduction system of bluetooth headset, a kind of noise reduction system suitable for neck ring bluetooth headset in embodiment, bag
It includes：
Voice data input unit 201, for inputting main Mike (the first main Mike, the second main Mike or the first main wheat
Gram and the 3rd main Mike) acquisition voice signal, noise data input unit 202, for input auxiliary Mike acquisition noise
Signal.
Whether speech activity detection unit 203, the voice signal for detecting the input of voice data input unit 201 come from
The voice of people, voice data judging unit 204, for judging voice signal whether from earphone wearer.
Filter unit 205 is judged as the voice signal of wearer to noise data for sentencing unit 204 using voice data
The noise signal that input unit 202 inputs carries out multi-subband time-domain filtering.
The noise reduction system of neck ring bluetooth headset further includes noise reduction parameter computing unit 206, the sound of main Mike's acquisition
Signal and 205 filtered noise signal of filter unit are first into noise reduction parameter computing unit 206, pass through filtering
Noise signal update noise reduction parameter after unit multi-subband time-domain filtering.
Noise suppression unit 207 adopts main Mike for passing through the noise signal after filter unit multi-subband time-domain filtering
The voice signal of collection carries out noise suppressed.
The noise reduction system of neck ring bluetooth headset provided by the utility model carries out noise reduction process by the following method, specifically
A kind of noise-reduction method of neck ring bluetooth headset, the described method includes：
Main Mike's collected sound signal, and pass through voice data input unit 201 and voice signal is separately input into voice
Activity detector units 203 and noise suppression unit 207.
Mike's acquisition noise signal is aided in, and passes through noise data input unit 202 and noise signal is transmitted separately to language
Sound data determining unit 204 and filter unit 205.
Whether speech activity detection unit 203 detects the voice signal of 201 input of voice data input unit from people's
Voice, if
Then voice signal is inputted to voice data judging unit 204, voice data judging unit 204 passes through voice signal
Whether voice signal is judged from earphone wearer with noise signal, if
Transmission of sound signals to filter unit 205 is then subjected to multi-subband time-domain filtering to noise signal；
If judging voice signal right and wrong from earphone wearer, this section of voice signal is as background noise.
The sound that noise suppression unit 207 gathers main Mike by the noise signal after filter unit multi-subband time-domain filtering
Sound signal carries out noise suppressed.
Judge voice signal whether from wearer
The utility model voice data judging unit as shown in Figure 6 judges the flow diagram of the voice signal of wearer,
The utility model speech activity detection unit 203 detects that the voice signal of main Mike's input has from people's voice
When, whether voice data judging unit 204 judges voice signal from earphone wearer by the following method：
Delay process is carried out to noise signal, noise signal carries out related place for the first time to voice signal by treated
Reason, obtains the first correlated results, the first correlated results is calculated in the following way in embodiment：
Voice signal and noise signal are subjected to second of relevant treatment, the second correlated results is obtained, passes through in embodiment
Correlated results is calculated in following manner：
Wherein
X1 (k) is noise signal, and x2 (k) is voice signal, and coeff1 is the first correlated results, and coeff2 is related for second
As a result, τ is the delay duration of the first correlated results processing procedure voice signal.
First correlated results and the second correlated results are compared, if the first correlated results is more than the second correlated results,
And the two difference is in predetermined threshold value, then judges that the voice signal comes from earphone wearer.
The utility model by voice data judging unit correlated results handle, effectively to main Mike acquisition sound into
Row judges, comes from wearer when the voice signal for judging main Mike's acquisition is non-, then by this section of voice signal as background noise.
Voice signal from wearer filters noise signal
Multi-subband time-domain filtering, this practicality as shown in Figure 7 carry out noise signal by the voice signal from wearer
New filter unit carries out noise signal the flow diagram of multi-subband time-domain filtering, according to the utility model, filter unit
205 include the first time-domain filtering molecular band module 301, the second time-domain filtering molecular band module 302, multiple time domain filterings (when
Domain wave filter 1, time domain filtering 2 ..., time domain filtering N) and adder 303, wherein
First filtering molecular band module 301, for noise signal to be divided into multiple subbands；
Second filtering molecular band module 302 is judged as that the voice signal of wearer is drawn for voice data to be sentenced unit 204
It is divided into multiple subbands.
Multiple time domain filterings sentence the multiple subbands for the voice signal division that unit judges are wearer for voice data
Time-domain filtering is carried out to multiple subbands of noise signal division respectively.
Synthesizer, for the filtered subsignal of each time domain filtering in multiple time domain filterings to be overlapped.
Specifically, the noise signal x1 of input is divided into x11 by the first filtering molecular band module 301 in embodiment,
Voice data is sentenced the sound that unit 204 is judged as wearer by the more a subbands of x12 ..., x1N, the second filtering molecular band module 302
Signal x2 is divided into x21, the more a subbands of x22 ..., x2N.Multiple subband x21 of voice signal x2, x22 ..., x2N is respectively to making an uproar
Multiple subband x11 of acoustical signal x1, x12 ..., x1N are filtered in time domain filtering, i.e.,：
X21 carries out time-domain filtering to x11 in time domain filtering 1；
X22 carries out time-domain filtering to x12 in time domain filtering 2；
X2N carries out time-domain filtering to x1N in time domain filtering N.
It should be noted that above-mentioned time-domain filtering process, voice data is sentenced the voice signal that unit judges are wearer and is drawn
Point multiple subbands in, multiple sons that each subband that frequency range is in 300Hz~3.4KHz divides noise signal
Subband in band in the range of corresponding flat rate carries out time-domain filtering.
Each time domain filtering exports the subsignal of filtered noise signal, multiple subsignal z11, z12 ..., z1N respectively
It is overlapped by synthesizer device, obtains the noise signal X1 after filtering unit filters.Preferably, time domain is multiple in the present embodiment
Time domain filtering uses normalization minimum mean-square error-filter (NLMS), calculates by the following method：Z1n=NLMS (x1n,
X2n), wherein, n represents the number of subband.
Filtered noise signal is synthesized by synthesizer, is specifically calculated as follows filtered
Noise signal：X1=z11+z12+ ...+z1N.
Since voice signal is mainly in the range of 300Hz~3.4KHz, the utility model is filtered by molecular band, to auxiliary wheat
Voice signal in the noise signal of gram elegance collection in the range of certain frequency carries out adaptive voice filtering, removes auxiliary microphone
The voice signal of wearer in the noise of acquisition retains the voice signal of non-wearer to promote tonequality, for being higher than certain frequency
The signal of rate does not filter to ensure noise reduction.
Noise signal is to voice signal noise reduction
The utility model passes through the processing of the utility model above-described embodiment, noise signal by filtered noise signal
Clean noise signal (including ambient noise signal and non-wearer's voice signal) is in, below by filtering
Noise signal afterwards carries out noise reduction process to voice signal, the stream of noise suppressed in the utility model voice signal as shown in Figure 8
Journey schematic diagram, in embodiment filtered noise signal X1 (k) and main Mike collected sound signal x2 (k) respectively by adding window simultaneously
Fast Fourier Transform (FFT) (FFT) is carried out, obtains frequency domain data：
Wherein m is frequency domain subscript, and n is time domain frame number, there is frame step-length during overlapping between L expression consecutive frames, w is length
For the analysis window function (such as Hanning window) of K, X1(m, n), X2(m, n) is that X1 (k) is corresponded to after X2 (k) Short Time Fourier Transforms
Frequency domain data, g be voice signal X2 gain correction factor.
Gain correction factor g is obtained by the ratio calculation of the standard deviation of the bottom noise cancellation signal to being received under two-way mute state
It arrives：
Wherein the standard deviation of input signal can pass through
It is calculated, wherein NN represents to calculate the frame number of the signal used in standard deviation, and u is the average of x (k).
According to the characteristic of mute section of calculating noise between speech interval, noise power spectrum is calculated by following iterative algorithm
Density Pw(m, n) is obtained
PW(m, n)=λW·PW(m,n-1)+(1-λW)·|X(m,n)|2if n<Nmax (4)
Wherein NmaxThe frame number maximum of the close needs of noise power spectrum, λ are asked in expressionWIt is forgetting factor.Compose gain G (m, n)
For
WhereinThe power spectral density that Mike receives signal is calculated by following formula
It obtains
PX(m, n)=λX·PX(m,n-1)+(1-λX)·|X(m,n)|2 (6)
H12(m, n) represents the Fourier transformation of the shock response ratio between voice signal and noise signal, under meeting
Row equation
WhereinRepresent noise by auxiliary Mike receive after power,WithIt represents respectively auxiliary
The power for the noise signal that Mike and main Mike receive is helped,WithRespectively aid in Mike and main Mike
Assume that voice signal and noise signal are independent in the power of the voice signal received, wherein embodiment.According to actual field
Scape, the voice signal power that voice signal power ratio another microphone received close to the microphone of sound source receives is more
By force, it is calculated by formula (4) | H12(m, n) |, spectrum gain G (m, n) is calculated applied to formula (5), G (m, n) represents dry
The ratio of the power spectrum for the voice signal that net voice signal power spectral density and Mike receive.So it can finally be gone
Except the frequency-region signal after noise
S (m, n)=G (m, n) X2(m,n) (8)
S (m, n) by Fourier inversion and with the corresponding voice signals for being superimposed, being exported of frame step-length L：
Y (k)=ovlp (IFFT [S (m, n)])
Above-described embodiment inhibits the noise in voice signal by noise suppression unit, and the live streaming of output is made to put loudspeaker
Sound more cleans.
Neck ring blue-tooth earphone structure is to have the first main Mike in embodiment illustrated in fig. 3 used by the utility model
101 and during three main Mikes 105, further include beam shaping elements, the first main Mike 101 in the noise reduction system of neck ring bluetooth headset
The voice signal of acquisition generates first via output signal by the way that the noise signal that Mike 103 gathers is aided in carry out noise suppressed.
The voice signal that 3rd main Mike 105 gathers is by aiding in the noise signal that Mike 103 gathers to carry out noise suppressed
Generate the second tunnel output signal.
Beam shaping elements export the first via signal and the second tunnel output signal carries out beam forming processing, obtain final
The voice signal of output；
Or first main Mike acquisition voice signal and the voice signal of the 3rd main Mike's acquisition carry out Wave beam forming processing
Afterwards, noise suppressed is carried out by the noise signal that Mike is aided in gather
Neck ring formula bluetooth headset provided by the utility model is laid out neck ring formula bluetooth headset microphone, by main wheat
Gram with auxiliary Mike by neck ring structure at a distance separating, two microphones are in larger distance, the data that two-way microphone gathers
Gain inequality is larger, for the diamylose gram noise reduction algorithm of use, can obtain preferable noise reduction.Make main Mike's acquisition simultaneously
Voice signal is more accurate, and the judgement of wearer's spoken sounds can be effectively performed.
The noise reduction system of neck ring bluetooth headset provided by the utility model, by setting phonetic decision unit judges wearer
Voice signal, distinguish other people around call in spoken sounds, judge whether voice is wearer institute using correlated results
It says, is talked the ambient noise to be formed with other single or multiple people around eliminating.It keeps silence in wearer, and apart from wearer
There are one in close scope or other multiple speakers, speech detection will be unable to judge that the voice is that wearer is said
Ambient noise around or, this will influence diamylose gram noise reduction.Judge that the segment signal is that have term using correlated results
Sound signal or ambient noise, it will promote diamylose gram noise reduction, effectively inhibit the ambient noise that surrounding voice is formed.
The noise reduction system of neck ring bluetooth headset provided by the utility model carries out noise signal by filter unit mostly sub
Band time-domain filtering, so as to balance tonequality and noise reduction.By to the voice signal molecular band in certain band limits to auxiliary
The noise signal that microphone collects carries out adaptive temporal filter, and tonequality is promoted while preferable noise reduction is obtained.
Explanation and practice with reference to the utility model disclosed here, the other embodiment of the utility model is for this field
Technical staff will be readily apparent and understand.Illustrate and embodiment be regarded only as being exemplary, the utility model it is real
Scope and spirit are defined in the claims.
Claims (6)
1. a kind of neck ring bluetooth headset, which is characterized in that the earphone includes carrying the annular supporting structure of opening and by described
The headset earpiece for the earphone cable connection that annular supporting structure stretches out；
It is set in the middle part of the annular supporting structure towards outside auxiliary Mike and in the annular supporting structure opening
First main Mike is installed or the second main Mike is installed on the earphone cable in one end.
2. earphone according to claim 1, which is characterized in that the first main Mike is in the annular supporting structure opening
One end end installation.
3. earphone according to claim 1, which is characterized in that the first main Mike is in the annular supporting structure opening
One end towards inwardly installation.
4. according to the earphone described in claim 1 or 2 or 3, which is characterized in that also pacify one end of the annular supporting structure opening
The 3rd inside main Mike of dress direction.
5. earphone according to claim 1, which is characterized in that earphone cable is stretched out in the annular supporting structure both sides respectively.
6. earphone according to claim 1, which is characterized in that arrangement noise reduction system inside the annular supporting structure.
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| CN201721412820.7U CN207382519U (en) | 2017-10-30 | 2017-10-30 | A kind of neck ring bluetooth headset |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107889002A (en) * | 2017-10-30 | 2018-04-06 | 恒玄科技（上海）有限公司 | Neck ring bluetooth earphone, the noise reduction system of neck ring bluetooth earphone and noise-reduction method |
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2017
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107889002A (en) * | 2017-10-30 | 2018-04-06 | 恒玄科技（上海）有限公司 | Neck ring bluetooth earphone, the noise reduction system of neck ring bluetooth earphone and noise-reduction method |
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Address after: 201306 room 904, No. 800, Huanhu West 2nd Road, Lingang New Area, China (Shanghai) pilot Free Trade Zone, Pudong New Area, Shanghai Patentee after: Hengxuan Technology (Shanghai) Co., Ltd Address before: 200135 Shanghai 647 free trade pilot area, 171 Pudong New Area Road, 1 buildings, 6 rooms Patentee before: Heng Xuan Technology (Shanghai) Co., Ltd. |