CN109688513A - Wireless active noise reduction earphone and double active noise reduction earphone communicating data processing methods - Google Patents
Wireless active noise reduction earphone and double active noise reduction earphone communicating data processing methods Download PDFInfo
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- CN109688513A CN109688513A CN201811374195.0A CN201811374195A CN109688513A CN 109688513 A CN109688513 A CN 109688513A CN 201811374195 A CN201811374195 A CN 201811374195A CN 109688513 A CN109688513 A CN 109688513A
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- 230000004927 fusion Effects 0.000 claims abstract description 60
- 210000000613 ear canal Anatomy 0.000 claims description 44
- 238000000034 method Methods 0.000 claims description 25
- 238000001514 detection method Methods 0.000 claims description 12
- 238000011282 treatment Methods 0.000 abstract description 3
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- 238000004891 communication Methods 0.000 description 5
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2430/00—Signal processing covered by H04R, not provided for in its groups
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Abstract
It includes: feedforward call voice that the present invention, which provides a kind of wireless active noise reduction earphone communicating data processing method, multiplexing carries out signal processing for the feedforward Mike of active noise reduction, the first converter, the first Time-Delay Filter, signal after processing passes through a high-pass filter, and the High Pass Filter Cutoff Frequency is f0, wherein frequency f0Between between 300Hz and 2KHz；Call voice is fed back, multiplexing carries out signal processing for the feedback Mike of active noise reduction, the second converter, the second Time-Delay Filter, and signal after processing passes through a low-pass filter, and the low pass filter cutoff frequency is f1, wherein frequency f1Between between 200Hz and 3KHz；Feedforward call voice by high-pass filter and the feedback call voice by low-pass filter are subjected to data fusion, exported voice signal all the way.The present invention improves the voice quality being sent in the earpiece of distal end to multiple Mike's voice data fusion treatments.
Description
Technical field
The present invention relates to sound signal processing technical field, in particular to wireless active noise reduction earphone and double active noise reduction ears
Machine communicating data processing method.
Background technique
With the development of communication technology, wireless binaural bluetooth headset is got growing concern for, because ears call and
Biphonic music playback function brings the good hearing enjoying of user, and will be widely welcomed by consumer, however works as people
When answering and making a phone call in a noisy environment, ambient noise can be picked up by the call microphone of earphone, and call language
Sound mixes, and is sent in the earpiece of counterpart telephone by uplink, and ambient noise is sent to far by proximal end (talker one end)
It holds (those who answer one end), influences the voice quality that other side receives calls.
As technology develops, active noise reduction earphone occurs therewith, and the mode for generalling use active noise reduction in the prior art is come
Noise is eliminated, people can be allowed to obtain a relatively quiet environment in noisy environment, principle is to pass through earphone
Issue the sound wave of opposite in phase actively to offset sound wave (feedforward) or add the acoustic path of feedback (instead in sound passage
Feedback) reduce the noise that ear is heard.
However, being directed to wireless binaural bluetooth headset, data feedback channel noise is relatively low after active noise reduction in the prior art, often
Make it difficult to reach effective call voice quality, the clearly voice for making other side be difficult to hear.
Therefore, in order to solve the problems in the prior art, a kind of wireless active noise reduction earphone and double active noise reduction ears are needed
Machine communicating data processing method, so that having higher signal-to-noise ratio after wireless Bluetooth headsets noise reduction in call.
Summary of the invention
One aspect of the present invention is to provide a kind of wireless active noise reduction earphone communicating data processing method, the method
Include:
Feedover call voice, multiplexing for the feedforward Mike of active noise reduction, the first converter, the first Time-Delay Filter into
Row signal processing, signal after processing pass through a high-pass filter, and the High Pass Filter Cutoff Frequency is f0, wherein frequency
Rate f0Between between 300Hz and 2KHz；
Feed back call voice, multiplexing for the feedback Mike of active noise reduction, the second converter, the second Time-Delay Filter into
Row signal processing, signal after processing pass through a low-pass filter, and the low pass filter cutoff frequency is f1, wherein
Frequency f1Between between 200Hz and 3KHz；
Feedforward call voice by high-pass filter and the feedback call voice by low-pass filter are subjected to data
Fusion, is exported voice signal all the way.
Preferably, feedback call voice further includes echo cancellor, after echo cancellor, is detected by earphone wearer's sounding
Module judges whether there is the voice from earphone wearer in ear canal.
Preferably, ambient sound progress active noise reduction is acquired to obtain to feedforward Mike, the ambient sound of feedback Mike's acquisition is carried out
Active noise reduction.
Another aspect of the present invention is to provide a kind of wireless double active noise reduction earphone communicating data processing methods, described
Method includes:
Left earphone obtains first via output voice signal as follows:
Left earphone feedforward call voice, multiplexing is for the feedforward Mike of active noise reduction, the first converter, the filter of the first time delay
Wave device carries out signal processing, and signal after processing passes through a high-pass filter, and the High Pass Filter Cutoff Frequency is f0,
In, frequency f0Between between 300Hz and 2KHz；
Left earphone feeds back call voice, and multiplexing is for the feedback Mike of active noise reduction, the second converter, the filter of the second time delay
Wave device carries out signal processing, and signal after processing passes through a low-pass filter, and the low pass filter cutoff frequency is f1,
Wherein, frequency f1Between between 200Hz and 3KHz；
It converses by the left earphone feedforward call voice by high-pass filter and by the left earphone feedback of low-pass filter
Voice carries out data fusion, obtains first via output voice signal；
Right earphone obtains the second tunnel output voice signal as follows:
Right earphone feedforward call voice, multiplexing is for the feedforward Mike of active noise reduction, third converter, the filter of third time delay
Wave device carries out signal processing, and signal after processing passes through a high-pass filter, and the High Pass Filter Cutoff Frequency is f0,
In, frequency f0Between between 300Hz and 2KHz；
Right earphone feeds back call voice, and multiplexing is for the feedback Mike of active noise reduction, the 4th converter, the filter of the 4th time delay
Wave device carries out signal processing, and it is f that signal after processing, which obtains the low pass filter cutoff frequency by a low-pass filter,1
, wherein frequency f1Between between 200Hz and 3KHz；
It converses by the right earphone feedforward call voice by high-pass filter and by the right earphone feedback of low-pass filter
Voice carries out data fusion, obtains the second tunnel output voice signal；
First via output voice signal and/or second tunnel output voice signal are sent to other side's earphone and carry out the
Secondary data fusion will obtain call voice and be sent to distal end after fusion.
Preferably, left earphone and each self feed back call voice of right earphone further include echo cancellor, after echo cancellor, earphone
Wearer's sounding detection module judges whether have in ear canal from earphone wearer's voice.
Preferably, left earphone and right earphone, which respectively acquire feedforward Mike, to obtain ambient sound and carries out active noise reduction, left earphone and
Right earphone acquires to obtain ambient sound progress active noise reduction to feedback Mike respectively.
Preferably, the first via output voice signal is sent to right earphone and second tunnel output voice signal carries out
Second of data fusion or second tunnel output voice signal are sent to left earphone and first via output voice signal
Carry out second of data fusion.
Another aspect of the invention is to provide a kind of wireless double active noise reduction earphone communicating data processing methods, described
Method includes:
Left earphone feedforward call voice, multiplexing is for the feedforward Mike of active noise reduction, the first converter, the filter of the first time delay
Wave device carries out signal processing；
Left earphone feeds back call voice, and multiplexing is for the feedback Mike of active noise reduction, the second converter, the filter of the second time delay
Wave device carries out signal processing；
Right earphone feedforward call voice, multiplexing is for the feedforward Mike of active noise reduction, third converter, the filter of third time delay
Wave device carries out signal processing；
Right earphone feeds back call voice, and multiplexing is for the feedback Mike of active noise reduction, the 4th converter, the filter of the 4th time delay
Wave device carries out signal processing；
Left earphone feedforward call voice, the left earphone feedback call voice of left earphone acquisition are sent to right earphone, with auris dextra
Right earphone feedforward call voice, the right earphone feedback call voice of machine acquisition carry out data fusion, and/or
Right earphone feedforward call voice, the right earphone feedback call voice of right earphone acquisition are sent to left earphone, with left ear
Left earphone feedforward call voice, the left earphone feedback call voice of machine acquisition carry out data fusion；
Call voice will be obtained after fusion is sent to distal end.
Preferably, left earphone and each self feed back call voice of right earphone include echo cancellor, and after echo cancellor, earphone is worn
Band person's sounding detection module judges whether have in ear canal from earphone wearer's voice.
Preferably, left earphone and right earphone, which respectively acquire feedforward Mike, to obtain ambient sound and carries out active noise reduction, left earphone and
Right earphone acquires to obtain ambient sound progress active noise reduction to feedback Mike respectively.
A kind of wireless active noise reduction earphone provided by the invention and double active noise reduction earphone communicating data processing methods, pass through
Multiplexing is used for each signaling module of active noise reduction, carries out signal processing to call voice, can save for voice signal
Processing unit keeps the integrated level of earphone higher, and power consumption is lower.
A kind of wireless active noise reduction earphone provided by the invention and double active noise reduction earphone communicating data processing methods, for
Feedforward Mike and the voice signal for feeding back Mike's different frequency are handled, and carry out data fusion, so that wireless Bluetooth headsets
There is in call higher signal-to-noise ratio after noise reduction.
A kind of wireless active noise reduction earphone provided by the invention and double active noise reduction earphone communicating data processing methods, to more
The voice data of a Mike is handled, and improves the voice quality being sent in the earpiece of distal end.
It should be appreciated that aforementioned description substantially and subsequent detailed description are exemplary illustration and explanation, it should not
As the limitation to the claimed content of the present invention.
Detailed description of the invention
With reference to the attached drawing of accompanying, the more purposes of the present invention, function and advantage are by the as follows of embodiment through the invention
Description is illustrated, in which:
Fig. 1 diagrammatically illustrates the structural schematic diagram of a wireless active noise reduction earphone of the invention.
Fig. 2 shows the module frame charts of signal processing chip of the present invention.
Fig. 3 shows the schematic diagram of a wireless active noise reduction earphone communicating data processing method of the invention.
Fig. 4 shows the structural schematic diagram of double active noise reduction wireless headsets of the invention.
Fig. 5 shows the schematic diagram of double active noise reduction earphone communicating data transmission in one embodiment of the invention.
Fig. 6 shows in one embodiment of the invention data fusion schematic diagram in the left earphone of double active noise reduction earphones.
Fig. 7 shows the schematic diagram of double active noise reduction earphone communicating data transmission in another embodiment of the present invention.
Fig. 8 shows in another embodiment of the present invention data fusion schematic diagram in the left earphone of double active noise reduction earphones.
Specific embodiment
By reference to exemplary embodiment, the purpose of the present invention and function and the side for realizing these purposes and function
Method will be illustrated.However, the present invention is not limited to exemplary embodiment as disclosed below；Can by different form come
It is realized.The essence of specification is only to aid in those skilled in the relevant arts' Integrated Understanding detail of the invention.
Hereinafter, the embodiment of the present invention will be described with reference to the drawings, relevant technical terms should be those skilled in the art
Known to member.In the accompanying drawings, identical appended drawing reference represents same or similar component or same or like step,
Unless otherwise indicated.In the prior art, voice communication is carried out by wireless headset, after often proximal end speech is sent to distal end,
Voice quality will be deteriorated.In order to solve the problems in the prior art, below by specific embodiment to the contents of the present invention
It is illustrated.
Embodiment one
The structural schematic diagram of one wireless active noise reduction earphone of the present invention as shown in Figure 1, it is according to embodiments of the present invention in
For left earphone, a feedback Mike 12 is arranged in the front end of left earphone case 1, wearer is made to use feedback Mike 12 when earphone
It extend into ear canal, by acquiring the voice signal of caller in caller's ear canal, before the rear end of left earphone case 1 arranges one
Mike 11 is presented, by the voice signal of acquisition caller outside ear canal.Signal processing chip 13 is accommodated in left earphone case 1
And loudspeaker are played, it plays loudspeaker and is used to play the call voice that distal end sends over.
In order to enable the present invention clearly to illustrate, need to say the signal processing chip 13 of active noise reduction earphone
Bright, the module frame chart of signal processing chip of the present invention as shown in Figure 2, signal processing chip includes feed forward noise reduction channel and feedback drop
It makes an uproar channel, feed forward noise reduction channel is used to acquire the noise outside ear canal, carries out feed forward noise reduction.Feedback noise reduction channel is for acquiring ear canal
Interior noise signal carries out feedback noise reduction.
Feed forward noise reduction channel includes the feedforward Mike 11 on the outside of earphone, with feedforward sequentially connected first AD of Mike 11
Converter 102, the first low time delay filter 103 and feedforward filter 104.
The Mike 101 that feedovers acquires the ambient noise on the outside of earphone around (outside ear canal), and the sound of acquisition is converted into simulating
Electric signal, analog electrical signal are sent to the first converter 102 and are converted to digital signal, and digital signal is filtered by the first time delay
After the processing of device 103, feed forward noise reduction is carried out by feedforward filter 104.
Feedback noise reduction channel includes the feedback Mike 12 on the inside of earphone, with feedback sequentially connected 2nd AD of Mike 12
Converter 202, the second low time delay filter 203 and feedback filter 204.
The noise signal that feedback Mike 12 acquires (in ear canal) on the inside of earphone (inevitably collects earphone horn to broadcast
The sound put), the sound of acquisition is converted into analog electrical signal, analog electrical signal is sent to the second converter 202 and is converted to
Digital signal, digital signal carry out feedback noise reduction after the processing of the second Time-Delay Filter 203, by feedback filter 204.
Signal processing chip further includes an echo cancellation filter 301, carries out echo to the sound that loudspeaker play is played
It eliminates.
It is defeated after access is to the sound progress noise reduction process that loudspeaker play is played after feed forward noise reduction access and feedback noise reduction
Voice signal clean after noise reduction out.
One wireless active noise reduction earphone communicating data processing method of the present invention is illustrated below, as shown in Figure 3 originally
The schematic diagram for inventing a wireless active noise reduction earphone communicating data processing method, in embodiment by taking left earphone as an example.The present invention
Mainly for the language data process in active noise reduction earphone communication process, active noise reduction is opened in communication process, it can also be with
Close active noise reduction.Signal processing chip 13 includes the first converter, the first Time-Delay Filter connecting with feedforward Mike 11,
The second converter, the second Time-Delay Filter being connect with feedback Mike 12.Active noise reduction earphone acquires environment to feedforward Mike
Noise is handled by the first converter, the first Time-Delay Filter and feedforward filter, to the environment of feedback Mike's acquisition
Noise is handled by the second converter, the second Time-Delay Filter and feedback filter, is melted to two-way ambient noise
Active noise reduction is completed after conjunction.
The present invention is used for the signal processing unit of active noise reduction by multiplexing, leads to feedforward Mike and feedback Mike's pickup
Language sound carries out data processing, according to an embodiment of the invention, a kind of wireless active noise reduction earphone communicating data processing method packet
It includes:
The Mike 11 that feedovers picks up the call voice outside ear canal, and first AD of the feedforward call voice multiplexing for active noise reduction turns
Parallel operation, the first Time-Delay Filter carry out signal processing, and signal after processing passes through a high-pass filter, and high-pass filter is cut
Only frequency is f0, wherein frequency f0Between between 300Hz and 2KHz；In some preferred embodiments, frequency f0It chooses
500Hz reaches optimal call voice quality to obtain better data fusion effect.
The call voice in the pickup ear canal of Mike 12 is fed back, twoth AD of the feedback call voice multiplexing for active noise reduction turns
Parallel operation, the second Time-Delay Filter carry out signal processing, and signal after processing passes through a low-pass filter, and low-pass filter is cut
Only frequency is f1, wherein frequency f1Between between 200Hz and 3KHz；In some preferred embodiments, frequency f1It chooses
500Hz reaches optimal call voice quality to obtain better data fusion effect.
In above process, echo cancellor is carried out before the call voice filtering processing in ear canal that feedback Mike 12 picks up,
After echo cancellor, by earphone wearer's sounding detection module, judge whether there is the voice from earphone wearer in ear canal.
In some embodiments, echo cancellor is carried out before the call voice filtering processing outside ear canal that feedforward Mike 11 picks up.
Mike is fed back by picking up call voice in ear canal, since the call voice in ear canal is isolated from the outside, passes through feedback
The sound of Mike's acquisition can effectively judge whether call sound is that caller's (wearing earphone person) is talking.According to the present invention,
Call voice is fed back by earphone wearer sounding detection module, judges whether there is the voice from earphone wearer in ear canal,
If there is the voice from earphone wearer, which is not involved in the estimation of ambient sound, is conducive to subsequent call voice data
Fusion.
Feedback Mike in ear canal can collect the vibration generated when people's speech and cause voice signal, especially
Low frequency voice signal, the present invention carry out the detection of earphone wearer sounding by the voice signal of feedback Mike's acquisition, can be accurate
The voice by earphone wearer distinguished with external environment, avoid making the spoken sounds of other people (non-earphone wearers)
For handling for caller (earphone wearer).
When opening active noise reduction function, in carrying out call voice data handling procedure, to feedforward Mike and feedback wheat
Gram acquisition ambient sound carry out active noise reduction.
It, will be by high-pass filter after the multiplexing each processing module of active noise reduction is to the call voice processing of pickup
Feedover call voice and the feedback call voice progress data fusion by low-pass filter, is exported voice signal all the way.
For feeding back the echo cancellor of Mike, the voice that the distal end due to playing loudspeaker broadcasting sends over is by ear canal
Mike's acquisition, mainly influence of the consideration echo to speech quality are fed back, the voice that feedback Mike 12 picks up carries out echo cancellor
Processing.And the voice for playing loudspeaker broadcasting inevitably drains to outside ear canal, is fed forward the pickup of Mike 11, in some embodiments
In, the voice picked up to feedforward Mike 11 will also carry out echo cancellation process.
According to an embodiment of the invention, by by high-pass filter feedforward call voice with process low-pass filter it is anti-
It presents call voice and carries out data fusion 14, exported voice signal all the way.Obtained output voice signal is sent to distal end.
It should be appreciated that the voice signal of output all the way Jing Guo data fusion sends voice letter to distal end by communication apparatus (such as mobile phone)
Number.
Embodiment two
In following examples, the communicating data processing method of wireless binaural machine is illustrated, the present invention is for nothing
Line biphone merges the data of two earphones, to reinforce the call voice quality for being sent to distal end.
The structural schematic diagram of the double active noise reduction wireless headsets of the present invention as shown in Figure 4, in embodiment before left earphone case 1
End one feedback Mike 12 of arrangement extend into wearer in ear canal using feedback Mike 12 when earphone, by caller's ear canal
The voice signal for acquiring caller arranges a feedforward Mike 11 in the rear end of left earphone case 1, is conversed by acquisition outside ear canal
The voice signal of person.Signal processing chip 13 is accommodated in left earphone case 1 and plays loudspeaker, plays loudspeaker for broadcasting
Put the call voice that distal end sends over.
A feedback Mike 22 is arranged in the front end of right earphone shell 2, protrudes into wearer using feedback Mike 22 when earphone
Into ear canal, by acquiring the voice signal of caller in caller's ear canal, a feedforward wheat is arranged in the rear end of right earphone shell 2
Grams 21, by the voice signal of acquisition caller outside ear canal.Accommodated in right earphone shell 2 signal processing chip 23 and
Loudspeaker are played, loudspeaker is played and is used to play the call voice that distal end sends over.
It is equipped with signal transmitting and receiving module in left earphone and right earphone, is used for transmission/reception voice signal between to each other, such as schemes
The schematic diagram of double active noise reduction earphone communicating data transmission, the present invention one shown in Fig. 6 reality in one embodiment of the invention shown in 5
Apply in example data fusion schematic diagram in the left earphone of double active noise reduction earphones.According to the present invention, a kind of wireless double active noise reduction ears
Machine communicating data processing method includes:
Left earphone obtains the first via and exports voice
Left earphone obtains first via output voice signal as follows:
The Mike 11 that feedovers picks up the call voice outside ear canal, is transmitted to signal processing chip 13 and is filtered, i.e., left
Earphone feedovers, and call voice multiplexing is used for the first converter of active noise reduction, the first Time-Delay Filter carries out signal processing, warp
Treated, and signal passes through a high-pass filter, and the cutoff frequency of high-pass filter is f0, wherein frequency f0Between in 300Hz with
Between 2KHz.
It feeds back the call voice in the pickup ear canal of Mike 12, is transmitted to signal processing chip 13 and is filtered, i.e., it is left
Counter second converter, second Time-Delay Filter of the call voice multiplexing for active noise reduction that feedover of earphone carries out signal processing,
Signal after processing passes through a low-pass filter, and the cutoff frequency of low-pass filter is f1, wherein frequency f1Between in 200Hz with
Between 3KHz.
Feedforward call voice by high-pass filter and the feedback call voice by low-pass filter are subjected to data
Fusion 14 obtains first via output voice signal.The first via exports voice signal and carries out Signal coding, by signal transmitting and receiving module 15
It is forwarded.
Right earphone obtains the second tunnel and exports voice
Right earphone obtains the second tunnel output voice signal as follows:
The Mike 21 that feedovers picks up the call voice outside ear canal, is transmitted to signal processing chip 23 and is filtered, i.e., right
Earphone feedovers, and call voice multiplexing is used for the third converter of active noise reduction, third Time-Delay Filter carries out signal processing, warp
Treated, and signal passes through a high-pass filter, High Pass Filter Cutoff Frequency f0, wherein frequency f0Between in 300Hz and 2KHz
Between.
It feeds back the call voice in the pickup ear canal of Mike 22, is transmitted to signal processing chip 23 and is filtered, i.e., it is right
Counter fourth converter, fourth Time-Delay Filter of the call voice multiplexing for active noise reduction that feedover of earphone carries out signal processing,
Signal after processing passes through a low-pass filter, and the cutoff frequency of low-pass filter is f1, wherein frequency f1Between in 200Hz with
Between 3KHz.
Feedforward call voice by high-pass filter and the feedback call voice by low-pass filter are subjected to data
Fusion 24 obtains the second tunnel output voice signal.Second tunnel exports voice signal Signal coding, is carried out by signal transmitting and receiving module 25
Forwarding.
The first via exports voice and merges with the second tunnel output voice secondary data
First via output voice signal and/or the second tunnel output voice signal are sent to other side's earphone and carry out second of data
Fusion will obtain call voice and be sent to distal end after fusion.
In some embodiments, first via output voice signal is sent to right earphone and carries out data fusion.In some implementations
In example, the second tunnel output voice signal is sent to left earphone and carries out data fusion.In some embodiments, the first via exports voice
Signal is sent to right earphone, while the second tunnel output voice signal is sent to left earphone and carries out data fusion.
According to an embodiment of the invention, call voice in the ear canal that left earphone and each self feed back Mike of right earphone pick up into
Row filtering processing pre-echo is eliminated, and after echo cancellor, earphone wearer's sounding detection module judges whether come from ear canal
Earphone wearer's voice.In some embodiments, left earphone and right earphone respectively feedover Mike pickup ear canal outside call language
Echo cancellor is carried out before sound filtering processing.
Left earphone and right earphone acquire to obtain ambient sound progress active noise reduction, left earphone and right earphone point to feedforward Mike respectively
It is other that ambient sound progress active noise reduction is acquired to obtain to feedback Mike.
The situation of wireless binaural machine in the present embodiment, the echo cancellor of left and right earphone, active noise reduction and feedback Mike
Voice activity detection process is identical as the situation of wireless headset single in foregoing embodiments one, will not be described in great detail here.
Bluetooth, low function bluetooth or the near field magnetic induction communication technology (NFMI) can be used for the transmission of voice signal,
The mode that the present invention sends voice signal is not specifically limited.Left earphone is sent to the second tunnel output voice signal below
For, the second tunnel output voice signal that signal transmitting and receiving module 15 receives right earphone transmission carries out signal decoding, decoded
Second tunnel exports voice signal and first via output voice signal carries out second of data fusion 16.By second of data fusion
The call voice signal warp that the call voice obtained afterwards is obtained as the voice signal sent to distal end, after second of data fusion
Cross D/A converter be converted to analog signal be sent to distal end.
The present invention is mentioned carries out data fusion in left earphone and right earphone, so that after wireless Bluetooth headsets noise reduction in call
With higher signal-to-noise ratio.The second tunnel output language that the first via output voice signal and right earphone obtained by left earphone obtains
Sound signal carries out second of data fusion, carries out fusion treatment to the voice data of multiple Mikes, effectively improves and be sent to far
Hold the voice quality in earpiece.
Embodiment three
In another embodiment, left earphone and right earphone are interior without language data fusion, will feedforward Mike and feedback wheat
Gram voice signal picked up is sent to other side, carries out the fusion of four road voice data.
The schematic diagram of double active noise reduction earphone communicating data transmission, Fig. 8 institute in another embodiment of the present invention as shown in Figure 7
Show in another embodiment of the present invention data fusion schematic diagram in the left earphone of double active noise reduction earphones.According to the present invention, a kind of
Wirelessly double active noise reduction earphone communicating data processing methods include:
The feedforward Mike 11 of left earphone picks up the call voice outside ear canal, is transmitted to signal processing chip 13 and is filtered place
Reason, i.e., first converter, first Time-Delay Filter of the left earphone feedforward call voice multiplexing for active noise reduction carry out signal
Processing.
The feedback Mike 12 of left earphone picks up the call voice in ear canal, is transmitted to signal processing chip 13 and is filtered place
Reason, i.e., second converter, second Time-Delay Filter of the left earphone feedback call voice multiplexing for active noise reduction carry out signal
Processing,.
In some embodiments, left earphone feedforward call voice, further includes by a high pass filter, processes, high-pass filtering
The cutoff frequency of device is f0, wherein frequency f0Between between 300Hz and 2KHz.
Left earphone feedforward call voice, further includes handling by low-pass filter, and the cutoff frequency of low-pass filter is f1,
Wherein, frequency f1Between between 200Hz and 3KHz.
After above-mentioned processing, the feedforward call voice and feedback call voice of left earphone carry out Signal coding, by signal
Transceiver module is forwarded.
The feedforward Mike 21 of right earphone picks up the call voice outside ear canal, is transmitted to signal processing chip 23 and is filtered place
Third converter, third Time-Delay Filter of reason, i.e. right earphone the feedforward call voice multiplexing for active noise reduction carry out signal
Processing.
The feedback Mike 22 of right earphone picks up the call voice in ear canal, is transmitted to signal processing chip 23 and is filtered place
Fourth converter, fourth Time-Delay Filter of reason, i.e. right earphone the feedback call voice multiplexing for active noise reduction carry out signal
Processing.
In some embodiments, right earphone feedforward call voice, further includes by a high pass filter, processes, high-pass filtering
The cutoff frequency of device is f0, wherein frequency f0Between between 300Hz and 2KHz.
Right earphone feedforward call voice, further includes handling by a low-pass filter, the cutoff frequency of low-pass filter is
f1, wherein frequency f1Between between 200Hz and 3KHz.
After above-mentioned processing, the feedforward call voice and feedback call voice of right earphone carry out Signal coding, by signal
Transceiver module is forwarded.
According to an embodiment of the invention, left earphone feedforward call voice, left earphone that left earphone obtains feed back call voice
It is sent to right earphone, right earphone feedforward call voice, the right earphone feedback call voice obtained with right earphone carries out data fusion；
And/or right earphone feedforward call voice, the right earphone feedback call voice that right earphone obtains are sent to left earphone, obtain with left earphone
Left earphone feedforward call voice, the left earphone feedback call voice taken carries out data fusion, and call voice hair will be obtained after fusion
It send to distal end.
In some embodiments, left earphone and the feedforward call voice of right earphone go out by high-pass filter, left earphone and
The feedback call voice of right earphone is handled by low-pass filter.Left earphone passes through the feedforward call voice and warp of high-pass filter
The feedback call voice for crossing low-pass filter is sent to right earphone, with right earphone by high-pass filter feedforward call voice with
Data fusion and/or right earphone is carried out by the feedback call voice of low-pass filter to converse by the feedforward of high-pass filter
Voice and the feedback call voice for passing through low-pass filter are sent to left earphone, and the preceding feedthrough of high-pass filter is passed through with left earphone
Language sound and the feedback call voice for passing through low-pass filter carry out data fusion；Call voice will be obtained after the fusion of four circuit-switched datas
It is sent to distal end.
According to an embodiment of the invention, call voice in the ear canal that left earphone and each self feed back Mike of right earphone pick up into
Row filtering processing pre-echo is eliminated, and after echo cancellor, earphone wearer's sounding detection module judges whether come from ear canal
Earphone wearer's voice.In some embodiments, left earphone and right earphone respectively feedover Mike pickup ear canal outside call language
Echo cancellor is carried out before sound filtering processing.
Left earphone and right earphone acquire to obtain ambient sound progress active noise reduction, left earphone and right earphone point to feedforward Mike respectively
It is other that ambient sound progress active noise reduction is acquired to obtain to feedback Mike.
The situation of wireless binaural machine in the present embodiment, the echo cancellor of left and right earphone, active noise reduction and feedback Mike
Voice activity detection process is identical as the situation of wireless headset single in foregoing embodiments one, will not be described in great detail here.
Bluetooth, low function bluetooth or the near field magnetic induction communication technology (NFMI) can be used for the transmission of voice signal,
The mode that the present invention sends voice signal is not specifically limited.It is below f with the frequency that right earphone obtains0Voice signal
It is f with frequency1Voice signal be sent to for left earphone, four circuit-switched data fusions are carried out in left earphone.
The signal transmitting and receiving module of left earphone receive the feedforward call voice by high-pass filter of right earphone transmission with
Signal decoding is carried out by the feedback call voice of low-pass filter, right earphone is conversed by the feedforward of high-pass filter after decoding
Voice and the feedback call voice for passing through low-pass filter pass through the feedforward call voice and process of high-pass filter with left earphone
The feedback call voice of low-pass filter carries out data fusion 16.The call voice obtained after data fusion is used as to distal end
The voice signal of transmission, the call voice signal obtained after data fusion are converted to analog signal by D/A converter and are sent to far
End.
The present invention is merged using the four road voice data that four Mikes of left and right earphone pick up, to the language of multiple Mikes
Sound data carry out fusion treatment, effectively improve the voice quality being sent in the earpiece of distal end.It is provided by the invention a kind of wireless
Active noise reduction earphone and double active noise reduction earphone communicating data processing methods are used for each signal mode of active noise reduction by being multiplexed
Block carries out signal processing to call voice, can save the processing unit for voice signal, keep the integrated level of earphone higher,
Power consumption is lower.
A kind of wireless active noise reduction earphone provided by the invention and double active noise reduction earphone communicating data processing methods, for
Feedforward Mike and the voice signal for feeding back Mike's different frequency are handled, and carry out data fusion, so that wireless Bluetooth headsets
There is in call higher signal-to-noise ratio after noise reduction.
A kind of wireless active noise reduction earphone provided by the invention and double active noise reduction earphone communicating data processing methods, to more
The voice data of a Mike is handled, and improves the voice quality being sent in the earpiece of distal end.
In conjunction with the explanation and practice of the invention disclosed here, the other embodiment of the present invention is for those skilled in the art
It all will be readily apparent and understand.Illustrate and embodiment is regarded only as being exemplary, true scope of the invention and purport are equal
It is defined in the claims.
Claims (10)
1. a kind of wireless active noise reduction earphone communicating data processing method, which is characterized in that the described method includes:
Feedover call voice, and multiplexing carries out letter for the feedforward Mike of active noise reduction, the first converter, the first Time-Delay Filter
Number processing, signal after processing pass through a high-pass filter, and the High Pass Filter Cutoff Frequency is f0, wherein frequency f0Between
Between 300Hz and 2KHz；
Call voice is fed back, multiplexing carries out letter for the feedback Mike of active noise reduction, the second converter, the second Time-Delay Filter
Number processing, signal after processing pass through a low-pass filter, and the low pass filter cutoff frequency is f1, wherein frequency f1
Between between 200Hz and 3KHz；
Feedforward call voice by high-pass filter and the feedback call voice by low-pass filter are subjected to data fusion,
Voice signal is exported all the way.
2. disappearing the method according to claim 1, wherein feedback call voice further includes echo cancellor through echo
After removing, by earphone wearer's sounding detection module, judge whether there is the voice from earphone wearer in ear canal.
3. active noise reduction is carried out the method according to claim 1, wherein acquire to the Mike that feedovers and to obtain ambient sound,
Active noise reduction is carried out to the ambient sound of feedback Mike's acquisition.
4. a kind of wireless double active noise reduction earphone communicating data processing methods, which is characterized in that the described method includes:
Left earphone obtains first via output voice signal as follows:
Left earphone feedforward call voice, multiplexing are used for the feedforward Mike of active noise reduction, the first converter, the first Time-Delay Filter
Signal processing is carried out, signal after processing passes through a high-pass filter, and the High Pass Filter Cutoff Frequency is f0, wherein
Frequency f0Between between 300Hz and 2KHz；
Left earphone feeds back call voice, and multiplexing is used for the feedback Mike of active noise reduction, the second converter, the second Time-Delay Filter
Signal processing is carried out, signal after processing passes through a low-pass filter, and the low pass filter cutoff frequency is f1,
In, frequency f1Between between 200Hz and 3KHz；
Call voice is fed back by the left earphone feedforward call voice by high-pass filter and by the left earphone of low-pass filter
Data fusion is carried out, first via output voice signal is obtained；
Right earphone obtains the second tunnel output voice signal as follows:
Right earphone feedforward call voice, multiplexing are used for the feedforward Mike of active noise reduction, third converter, third Time-Delay Filter
Signal processing is carried out, signal after processing passes through a high-pass filter, and the High Pass Filter Cutoff Frequency is f0, wherein
Frequency f0Between between 300Hz and 2KHz；
Right earphone feeds back call voice, and multiplexing is used for the feedback Mike of active noise reduction, the 4th converter, the 4th Time-Delay Filter
Signal processing is carried out, signal after processing is f by the low-pass filter low pass filter cutoff frequency1, wherein frequency
Rate f1Between between 200Hz and 3KHz；
Call voice is fed back by the right earphone feedforward call voice by high-pass filter and by the right earphone of low-pass filter
Data fusion is carried out, the second tunnel output voice signal is obtained；
The first via output voice signal and/or second tunnel output voice signal are sent to other side's earphone and carry out second
Data fusion will obtain call voice and be sent to distal end after fusion.
5. according to the method described in claim 4, it is characterized in that, left earphone and each self feed back call voice of right earphone further include
Echo cancellor, after echo cancellor, earphone wearer's sounding detection module judges whether have in ear canal from earphone wearer's language
Sound.
6. according to the method described in claim 4, it is characterized in that, left earphone and right earphone acquire to obtain ring to feedforward Mike respectively
Border sound carries out active noise reduction, and left earphone and right earphone acquire to obtain ambient sound progress active noise reduction to feedback Mike respectively.
7. according to the method described in claim 4, it is characterized in that, the first via output voice signal be sent to right earphone with
The second tunnel output voice signal carries out second of data fusion or second tunnel output voice signal is sent to left ear
Machine and first via output voice signal carry out second of data fusion.
8. a kind of wireless double active noise reduction earphone communicating data processing methods, which is characterized in that the described method includes:
Left earphone feedforward call voice, multiplexing are used for the feedforward Mike of active noise reduction, the first converter, the first Time-Delay Filter
Carry out signal processing；
Left earphone feeds back call voice, and multiplexing is used for the feedback Mike of active noise reduction, the second converter, the second Time-Delay Filter
Carry out signal processing；
Right earphone feedforward call voice, multiplexing are used for the feedforward Mike of active noise reduction, third converter, third Time-Delay Filter
Carry out signal processing；
Right earphone feeds back call voice, and multiplexing is used for the feedback Mike of active noise reduction, the 4th converter, the 4th Time-Delay Filter
Carry out signal processing；
Left earphone feedforward call voice, the left earphone feedback call voice of left earphone acquisition are sent to right earphone, obtain with right earphone
Right earphone feedforward call voice, the right earphone feedback call voice taken carries out data fusion, and/or
Right earphone feedforward call voice, the right earphone feedback call voice of right earphone acquisition are sent to left earphone, obtain with left earphone
Left earphone feedforward call voice, the left earphone feedback call voice taken carries out data fusion；
Call voice will be obtained after fusion is sent to distal end.
9. according to the method described in claim 8, it is characterized in that, left earphone and each self feed back call voice of right earphone include back
Sound is eliminated, and after echo cancellor, earphone wearer's sounding detection module judges whether have in ear canal from earphone wearer's language
Sound.
10. according to the method described in claim 8, it is characterized in that, left earphone and right earphone respectively acquire feedforward Mike
Ambient sound carries out active noise reduction, and left earphone and right earphone acquire to obtain ambient sound progress active noise reduction to feedback Mike respectively.
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