CN106534461B - The noise reduction system and its noise-reduction method of earphone - Google Patents
The noise reduction system and its noise-reduction method of earphone Download PDFInfo
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- CN106534461B CN106534461B CN201610974335.2A CN201610974335A CN106534461B CN 106534461 B CN106534461 B CN 106534461B CN 201610974335 A CN201610974335 A CN 201610974335A CN 106534461 B CN106534461 B CN 106534461B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/58—Anti-side-tone circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/24—Arrangements for testing
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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
- H04R3/02—Circuits for transducers, loudspeakers or microphones for preventing acoustic reaction, i.e. acoustic oscillatory feedback
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Circuit For Audible Band Transducer (AREA)
Abstract
The present invention provides the noise reduction system and its noise-reduction method of a kind of earphone, and the noise-reduction method is comprising steps of monitoring the volume of the voice signal of the microphone acquisition of earphone and receiving the first voice signal when the volume of voice signal increases suddenly, receive the second voice signal when the volume of voice signal die-offs；Second voice signal is filtered out from first voice signal, to obtain third voice signal.The noise reduction system and its noise-reduction method of earphone proposed by the present invention, pass through the variation of the volume of the voice signal of the microphone acquisition of real-time monitoring earphone, the first voice signal and the second voice signal are received according to its variation, then the second voice signal is filtered out from the first voice signal, to carry out noise reduction process to voice signal according to real-time noise, noise reduction effect is improved.
Description
Technical field
The present invention relates to technical field of mobile terminals more particularly to the noise reduction systems and its noise-reduction method of a kind of earphone.
Background technique
With the development of electronic technology, requirement of the people to mobile phone is higher and higher, especially to the call tone quality of mobile phone
It is required that higher and higher.The speech quality that each mobile phone producer also more focuses on voice uses ear to improve the speech quality of voice
Machine, which carries out voice communication, becomes the mode that everybody is commonly used.Currently, mobile phone producer passes through in the structure of earphone or configuration side
Face improves to achieve the purpose that noise reduction, but such earphone price is often more expensive, and using on a large scale is not very
Reality.
Summary of the invention
In order to solve the deficiencies in the prior art, the present invention provides the noise reduction system and its noise-reduction method of a kind of earphone, can
Noise in real-time monitoring voice signal, improves noise reduction effect.
It is proposed by the present invention the specific technical proposal is: provide a kind of noise reduction system of earphone, including signal monitoring module and
Signal processing module, the first voice signal and first voice of the microphone acquisition of the signal monitoring module monitors earphone
Signal die-off after the second voice signal, the signal processing module receives first voice signal and second voice letter
Number and second voice signal is obtained into third voice signal after filtering out in first voice signal.
Further, the signal monitoring module includes judging unit and receiving unit, and the judging unit judges earphone
The amplitude of variation of volume of voice signal of microphone acquisition whether belong to first threshold range, the receiving unit is according to institute
The comparison result for stating judging unit receives voice signal as the first voice signal or the second voice signal.
Further, the signal processing module includes phase-shifting unit and summation unit, and the phase-shifting unit generates and institute
State that the second voice signal amplitude is identical, deamplification of opposite in phase, the summation unit is to first voice signal and institute
Third voice signal is obtained after stating deamplification summation.
It further, further include control module, the control module is used to adjust the volume of the third voice signal.
Further, the control module includes comparing unit and sound volume regulation unit, and the comparing unit is relatively more described
The size of third voice signal and second threshold；The sound volume regulation unit adjusts institute according to the comparison result of the comparing unit
State the volume of third voice signal.
The present invention also provides a kind of noise-reduction methods of earphone noise reduction system, comprising the following steps: monitors the Mike of earphone
The volume of the voice signal of elegance collection simultaneously receives the first voice signal, the sound in voice signal when the volume of voice signal increases suddenly
Amount receives the second voice signal when die-offing；Second voice signal is filtered out from first voice signal, to obtain
Three voice signals.
Further, the volume of the voice signal of the microphone acquisition of earphone is monitored and when the volume of voice signal increases suddenly
The first voice signal is received, the second voice signal step is received when the volume of voice signal die-offs and specifically includes: judging earphone
The volume of voice signal of microphone acquisition increased or decrease whether amplitude belongs to first threshold range, if voice signal
The increasing degree of volume belongs to first threshold range, then is used as the first voice signal；If the reduction amplitude of the volume of voice signal
Belong to first threshold range, is then used as the second voice signal.
Further, the step of second voice signal being filtered out from first voice signal specifically includes: obtaining
Obtain deamplification identical as the second voice signal amplitude, opposite in phase；To first voice signal and the decaying
Signal summation.
Further, the volume for adjusting the third voice signal is further comprised the steps of:.
Further, the volume step for adjusting the third voice signal specifically includes: the third voice signal
Volume and second threshold size, if the volume of the third voice signal be greater than second threshold, turn down the third language
The volume of sound signal；If the volume of the third voice signal is less than second threshold, the sound of the third voice signal is turned up
Amount.
The noise reduction system and its noise-reduction method of earphone proposed by the present invention are acquired by the microphone of real-time monitoring earphone
The variation of the volume of voice signal receives the first voice signal and the second voice signal according to its variation, then by the second language
Sound signal is filtered out from the first voice signal, to carry out noise reduction process to voice signal according to real-time noise, is improved
Noise reduction effect.
Detailed description of the invention
With reference to the accompanying drawing, by the way that detailed description of specific embodiments of the present invention, technical solution of the present invention will be made
And other beneficial effects are apparent.
Fig. 1 is the structural schematic diagram of the noise reduction system of earphone；
Fig. 2 is the flow chart of the noise-reduction method of the noise reduction system of earphone in Fig. 1.
Specific embodiment
Hereinafter, with reference to the accompanying drawings to detailed description of the present invention embodiment.However, it is possible to come in many different forms real
The present invention is applied, and the present invention should not be construed as limited to the specific embodiment illustrated here.On the contrary, providing these implementations
Example is in order to explain the principle of the present invention and its practical application, to make others skilled in the art it will be appreciated that the present invention
Various embodiments and be suitable for the various modifications of specific intended application.In the accompanying drawings, identical label will be used for table always
Show identical element.
Referring to Fig.1, the noise reduction system of earphone provided in this embodiment includes signal monitoring module 1 and signal processing module 2.
Signal monitoring module 1 be used for monitor earphone microphone acquisition the first voice signal and the first voice signal die-off after second
Voice signal, signal processing module 2 is for receiving the first voice signal and the second voice signal and by the second voice signal from the
Third voice signal is obtained after filtering out in one voice signal.Wherein, third voice signal is transmitted to sound by earphone jack and passes
Defeated terminal, such as loudspeaker, mobile phone, tablet computer, then third voice signal can also further voice transmission terminal with
It is transmitted between voice transmission terminal, such as video, call.Here, the second voice signal exists as noise, i.e. voice signal
Played in voice transmission terminal or different voice transmission terminals between transmitted before just noise reduction process.
Specifically, signal monitoring module 1 is used to monitor the variation, simultaneously of the volume of the voice signal of the microphone acquisition of earphone
The first voice signal or the second voice signal are distinguished according to the variation of the volume of the voice signal of microphone acquisition.The present embodiment
In, it is that signal monitoring module 1, which then starts to receive and identify when the volume of voice signal for monitoring microphone acquisition increases suddenly,
One voice signal monitors then starting to receive and identify when die-offing as the second voice signal for the voice signal of microphone acquisition,
Wherein, the first voice signal is call environment locating for the voice signal of the user's communication of the microphone acquisition of earphone and user
Noise, the noise of the second voice signal call environment locating when piping down for user.
In order to avoid noise becomes larger during user does not converse or sound becomes smaller and causes to miss during user's communication
It receives, defining first threshold range here is a certain specific amplitude of variation, as judging the first voice signal and second
The foundation of transition between voice signal.Signal monitoring module 1 includes judging unit 11 and receiving unit 12, and judging unit 11 is used for
Whether the amplitude of variation for comparing the volume of the voice signal of the microphone acquisition of earphone belongs to first threshold range, receiving unit 12
For receiving the first voice signal or the second voice signal according to the comparison result of judging unit 11.
Specifically, the increase width of the volume for the voice signal that the microphone that the comparison result of judging unit 11 is earphone acquires
When degree belongs to first threshold range, receiving unit 12 receives the first voice signal；The comparison result of judging unit 11 is earphone
When the reduction amplitude of the volume of the voice signal of microphone acquisition belongs to first threshold range, receiving unit 12 receives the second voice
Signal.In this way, even if noise becomes larger during user does not converse, increasing degree is not belonging to first threshold range, at this point, receiving
Unit is received or noise signal and the second voice signal, alternatively, sound becomes smaller during user's communication, become smaller amplitude
It is not belonging to first threshold range, at this point, receiving unit is received or voice signal i.e. the first voice signal of user's communication.
Signal processing module 2 includes phase-shifting unit 21 and summation unit 22, and phase-shifting unit 21 is for generating and the second voice
Signal amplitude is identical, opposite in phase deamplification, and summation unit is used to obtain to after the first voice signal and deamplification summation
Third voice signal, wherein the first voice signal and deamplification are summed, the in deamplification and the first voice signal
Two voice signals are offset, to obtain the third voice signal after noise reduction.
Noise reduction system further includes control module 3, and control module 3 is used to adjust the volume of third voice signal.Here it defines
Second threshold is a certain specific audio, the standard as the volume for adjusting third voice signal.Control module 3 include than
Compared with unit 31 and sound volume regulation unit 32, comparing unit 31 is used to compare the size of third voice signal and second threshold；Volume
Adjust the volume that unit is used to adjust third voice signal according to the comparison result of comparing unit 32.Specifically, comparing unit 31
Comparison result be third voice signal be greater than second threshold when, sound volume regulation unit 32 turns the volume of third voice signal down；
When the comparison result of comparing unit 31 is that third voice signal is less than second threshold, sound volume regulation unit 32 tunes up third voice letter
Number volume.For example, when third voice signal is greater than second threshold, sound volume regulation unit 32 is by the volume tune of third voice signal
As low as second threshold；When third voice signal is less than second threshold, sound volume regulation unit 32 is by the volume tune of third voice signal
Greatly to second threshold.
Referring to Fig. 2, the present embodiment additionally provides the noise-reduction method of the noise reduction system, comprising the following steps:
Step S1, it monitors the volume of the voice signal of the microphone acquisition of earphone and receives first when voice signal increases suddenly
Voice signal receives the second voice signal when the volume of voice signal die-offs.
Wherein, step S1, which is specifically included, judges that the volume of the voice signal of microphone acquisition of earphone increaseds or decreases width
Whether degree belongs to first threshold range, if the increasing degree of the volume of voice signal belongs to first threshold range, is used as first
Voice signal；If the reduction amplitude of the volume of voice signal belongs to first threshold range, it is used as the second voice signal.
Step S2, the second voice signal is filtered out from the first voice signal, to obtain third voice signal.
Wherein, step S2 is specifically included:
Obtain deamplification identical as the second voice signal amplitude, opposite in phase；
It sums to first voice signal and the deamplification.
Step S3, the volume of third voice signal is adjusted.
Step S3 is specifically included: comparing the volume of third voice signal and the size of second threshold, if third voice signal
Volume be greater than second threshold, then turn down the volume of third voice signal；If the volume of third voice signal is less than second threshold,
The volume of third voice signal is then turned up.
The noise-reduction method of the noise reduction system for the earphone that the present embodiment proposes is acquired by the microphone of real-time monitoring earphone
The variation of the volume of voice signal receives the first voice signal and the second voice signal according to its variation, then by the second language
Sound signal is filtered out from the first voice signal, to carry out noise reduction process to voice signal according to real-time noise, is improved
Noise reduction effect.In addition to this, by the way that the size of the volume of third voice signal can also be automatically adjusted after noise reduction process.
The above is only the specific embodiment of the application, it is noted that for the ordinary skill people of the art
For member, under the premise of not departing from the application principle, several improvements and modifications can also be made, these improvements and modifications are also answered
It is considered as the protection scope of the application.
Claims (8)
1. a kind of noise reduction system of earphone, which is characterized in that including signal monitoring module and signal processing module, the signal prison
The second voice after the first voice signal and first voice signal for surveying the microphone acquisition of module monitors earphone are die-offed is believed
Number, the signal processing module receives first voice signal and second voice signal and by second voice signal
Third voice signal is obtained after filtering out in first voice signal, the signal monitoring module includes judging unit and reception
Unit, the judging unit judge whether the amplitude of variation of the volume of the voice signal of the microphone acquisition of earphone belongs to the first threshold
It is worth range, the receiving unit receives voice signal as the first voice signal or the according to the judging result of the judging unit
Two voice signals；If the increasing degree of the volume of voice signal belongs to first threshold range, the receiving unit receives voice
Signal is as the first voice signal, if the reduction amplitude of the volume of voice signal belongs to first threshold range, the reception is single
Member receives voice signal as the second voice signal.
2. the noise reduction system of earphone according to claim 1, which is characterized in that the signal processing module includes phase shift list
Member and summation unit, the phase-shifting unit generate deamplification identical as the second voice signal amplitude, opposite in phase, institute
Summation unit is stated to acquisition third voice signal after first voice signal and deamplification summation.
3. the noise reduction system of earphone according to claim 1, which is characterized in that it further include control module, the control mould
Block is used to adjust the volume of the third voice signal.
4. the noise reduction system of earphone according to claim 3, which is characterized in that the control module include comparing unit and
Sound volume regulation unit, the size of comparing unit the third voice signal and second threshold；The volume adjustment list
Member adjusts the volume of the third voice signal according to the comparison result of the comparing unit.
5. a kind of noise-reduction method of earphone noise reduction system, which comprises the following steps:
The volume of the voice signal of the microphone acquisition of monitoring earphone simultaneously receives the first voice when the volume of voice signal increases suddenly
Signal receives the second voice signal when the volume of voice signal die-offs；
Second voice signal is filtered out from first voice signal, to obtain third voice signal, monitors earphone
The volume of the voice signal of microphone acquisition simultaneously receives the first voice signal, the volume in voice signal when voice signal increases suddenly
The second voice signal step is received when die-offing to specifically include:
Judge the volume of the voice signal of the microphone acquisition of earphone increaseds or decreases whether amplitude belongs to first threshold range,
If the increasing degree of the volume of voice signal belongs to first threshold range, it is used as the first voice signal；If the sound of voice signal
The reduction amplitude of amount belongs to first threshold range, then is used as the second voice signal.
6. noise-reduction method according to claim 5, which is characterized in that by second voice signal from first voice
The step of filtering out in signal specifically includes:
Obtain deamplification identical as the second voice signal amplitude, opposite in phase；
It sums to first voice signal and the deamplification.
7. noise-reduction method according to claim 5, which is characterized in that further comprise the steps of: and adjust the third voice signal
Volume.
8. noise-reduction method according to claim 7, which is characterized in that adjust the volume step tool of the third voice signal
Body includes:
Compare the volume of the third voice signal and the size of second threshold, if the volume of the third voice signal is greater than the
Two threshold values then turn down the volume of the third voice signal；
If the volume of the third voice signal is less than second threshold, the volume of the third voice signal is turned up.
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| CN107015503A (en) * | 2017-04-13 | 2017-08-04 | 马导利 | A kind of electric cooker controlled based on music song |
| CN107396223B (en) * | 2017-07-31 | 2019-07-19 | 歌尔股份有限公司 | Earphone uplink noise-reduction method |
| CN109361987B (en) * | 2018-12-25 | 2020-11-13 | 歌尔科技有限公司 | Sports earphone and control method, device and equipment thereof |
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| CN102314884A (en) * | 2011-08-16 | 2012-01-11 | 捷思锐科技（北京）有限公司 | Voice-activation detecting method and device |
| CN104602155A (en) * | 2015-01-14 | 2015-05-06 | 中山市天键电声有限公司 | Wireless noise reduction earphone based on intelligent mobile terminal |
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| EP1581026B1 (en) * | 2004-03-17 | 2015-11-11 | Nuance Communications, Inc. | Method for detecting and reducing noise from a microphone array |
| CN101771912B (en) * | 2009-01-06 | 2013-01-16 | 美律实业股份有限公司 | Acoustic sensing device |
| CN102300140B (en) * | 2011-08-10 | 2013-12-18 | 歌尔声学股份有限公司 | Speech enhancing method and device of communication earphone and noise reduction communication earphone |
| CN102800324A (en) * | 2012-07-30 | 2012-11-28 | 东莞宇龙通信科技有限公司 | Audio processing system and method for mobile terminals |
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Patent Citations (2)
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| CN102314884A (en) * | 2011-08-16 | 2012-01-11 | 捷思锐科技（北京）有限公司 | Voice-activation detecting method and device |
| CN104602155A (en) * | 2015-01-14 | 2015-05-06 | 中山市天键电声有限公司 | Wireless noise reduction earphone based on intelligent mobile terminal |
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