CN106161780A - There is communicator and the noise-reduction method thereof of speaker decrease of noise functions - Google Patents
There is communicator and the noise-reduction method thereof of speaker decrease of noise functions Download PDFInfo
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- CN106161780A CN106161780A CN201610460703.1A CN201610460703A CN106161780A CN 106161780 A CN106161780 A CN 106161780A CN 201610460703 A CN201610460703 A CN 201610460703A CN 106161780 A CN106161780 A CN 106161780A
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- 238000000034 method Methods 0.000 title claims abstract description 37
- 230000006870 function Effects 0.000 title claims abstract description 11
- 230000009467 reduction Effects 0.000 claims abstract description 52
- 230000005236 sound signal Effects 0.000 claims abstract description 22
- 230000008569 process Effects 0.000 claims abstract description 20
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
- 238000001914 filtration Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- 230000003321 amplification Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 230000003044 adaptive effect Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
- H04M1/724—User interfaces specially adapted for cordless or mobile telephones
- H04M1/72448—User interfaces specially adapted for cordless or mobile telephones with means for adapting the functionality of the device according to specific conditions
- H04M1/72454—User interfaces specially adapted for cordless or mobile telephones with means for adapting the functionality of the device according to specific conditions according to context-related or environment-related conditions
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
- G10L21/0208—Noise filtering
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- Engineering & Computer Science (AREA)
- Human Computer Interaction (AREA)
- Signal Processing (AREA)
- Quality & Reliability (AREA)
- Health & Medical Sciences (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Computational Linguistics (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Environmental & Geological Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Circuit For Audible Band Transducer (AREA)
Abstract
The present invention relates to a kind of communicator with speaker decrease of noise functions and noise-reduction method thereof, for carrying high mobile phone, transmitter receiver, the communicator such as walkie-talkie and telephone set speech quality under noisy, the inventive system comprises speaker and mainboard, also include: Noise Acquisition device and noise reduction panel, described noise reduction panel is connected to described Noise Acquisition device, described speaker and described mainboard, for the noise signal of described Noise Acquisition device collection is carried out reverse process, and the noise signal after described reverse process and the audio signal from described mainboard are carried out output extremely described speaker after audio mixing.
Description
Technical field
The present invention relates to communication field, more particularly, it relates to a kind of communicator with speaker decrease of noise functions and
Its noise-reduction method.
Background technology
The raising required speech quality along with people, increasing denoising device is applied on communicator, but general
All over being that microphone carries out noise reduction improvement, lack the speaker to communicator and carry out noise reduction improvement, such as now on the market
Mobile phone the most all has diamylose decrease of noise functions, but does not possess the function of receiver noise reduction.And it is true that many times at noisy ring
Under border, call is unavoidable, such as building site, car and boat or other have the public place of bigger noise source.At noisy environment
In, use the listener of communicator call to hear voice and the environment noise sending words person simultaneously, may cause the listener cannot
Do not hear the language of the other side.Noise causes interference greatly to the accuracy that information is passed on, so providing one to have speaker
The communicator of decrease of noise functions is the most necessary.
Summary of the invention
The technical problem to be solved in the present invention is, for the defect of prior art, it is provided that having of a kind of improvement is raised one's voice
The communicator of device decrease of noise functions and noise-reduction method thereof.
The technical solution adopted for the present invention to solve the technical problems is: constructs and a kind of has the logical of speaker decrease of noise functions
T unit, including speaker and mainboard, also includes: Noise Acquisition device and noise reduction panel, and described noise reduction panel is connected to institute
State Noise Acquisition device, described speaker and described mainboard, for the noise signal of described Noise Acquisition device collection being carried out reversely
Process, and it is the most described that the noise signal after described reverse process and the audio signal from described mainboard carry out output after audio mixing
Speaker.
Preferably, described noise reduction panel includes being connected to described Noise Acquisition device collection with described Noise Acquisition device
Noise signal be amplified and reverse process obtains the wave filter of inverse noise signal.
Preferably, described wave filter includes that analog filter, described analog filter are to have amplification and reverse module
Low pass filter.
Preferably, described wave filter also includes being connected to export described analog filter with described analog filter
The digital filter that inverse noise signal is modified.
Preferably, described digital filter includes trap module.
Preferably, described noise reduction panel also includes that the mixer circuit for stereo process, described mixer circuit include two
Individual separate diode, the positive pole of said two diode connects the inverse noise signal output part of described wave filter respectively
And the audio signal output end of described mainboard；The negative pole of said two diode is connected with described speaker.
Preferably, described diode is the low pressure drop diode that tube voltage drop is less than 0.1V.
Preferably, described Noise Acquisition device is silicon microphone.
Preferably, described noise reduction panel also includes the on-off circuit being connected with described mainboard, and described mainboard is by described
On-off circuit controls described noise reduction panel and starts or stops work.
Present invention also offers the speaker noise-reduction method of a kind of communicator, described communicator includes noise reduction panel
And be connected with described noise reduction panel speaker, mainboard, Noise Acquisition device, the method comprises the following steps:
The ambient noise signal that described Noise Acquisition device collects is carried out reverse process and obtains by S1: described noise reduction panel
Inverse noise signal；
The audio signal of described inverse noise signal with the output of described mainboard is carried out at audio mixing by S2: described noise reduction panel
Reason obtains audio signal；
The output of described audio signal to described speaker, is produced inverse noise sound wave by S3: described noise reduction panel, described
Inverse noise offsets with described environment noise, thus realizes noise reduction.
The communicator of the present invention is to reduce even to eliminate the background noise in environment, have employed feed forward control techniques, mould
Intend exact depth filtering technique and audio mixing technology that wave filter combines with digital filter, be effectively improved the degree of depth of noise reduction
And width.Do not change the efficient voice quality of speaker output, it is achieved while high-quality call, also there is super low-power consumption simultaneously
Feature, do not increase the load of communicator battery.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the structural representation of some embodiments of communicator；
Fig. 2 is the circuit block diagram of communicator；
Fig. 3 is the circuit diagram of its mixer circuit；
Fig. 4 is the acoustic features figure of its speaker.
Detailed description of the invention
The invention will be further described below in conjunction with the accompanying drawings.
As it is shown in figure 1, the communicator with speaker decrease of noise functions that the present invention provides includes: speaker 1, mainboard 2,
Noise reduction panel 3 and noise gathering device 4.Above-mentioned parts are respectively positioned in the housing of communicator.
Fig. 2 shows the circuit block diagram of this communicator, and this noise reduction panel 3 includes analog filter 31, digital filtering
Device 32 and mixer circuit 33.The noise signal that Noise Acquisition device 4 is gathered by analog filter 31 and digital filter 32 is carried out instead
To process after, obtain inverse noise signal and export to mixer circuit 33, the audio signal that mainboard 2 is exported by mixer circuit 33 and
Inverse noise signal exports after carrying out stereo process to speaker 1 and plays.
This noise gathering device 4 preferably employs silicon microphone, to improve signal to noise ratio and the sensitivity of sound collection.
This analog filter 31 is a kind of low pass filter with amplification and reverse module, and this wave filter can be by silicon Mike
The tiny signal that wind collects is amplified, low-pass filtering and reversely.The amplification of analog filter 31, phase place and cut-off
Choosing of frequency determines the reduction degree to noise, the effect made an uproar in the further effect affecting noise reduction and the end.Additionally, analog filtering
Device 31 is the quickest to the process of signal.
This digital filter 32 preferably has the adaptive digital filter of trap module.Digital filter 32 receives mould
Intend reducing and the signal of low-pass filtering treatment through rough of wave filter 31 output.Analog filter 31 process on the basis of right
Signal carries out discretization, accurately revises noise waveform, automatically adjusts adaptive rate, including the frequency of input signal, phase place, frequently
Rate rate of change and amplitude etc..Design the mid frequency of notch algorithm, width and the degree of depth, to simulate input letter quickly and accurately simultaneously
Number inverted waveform.
The feature of analog filter 31 is that speed is fast, but effect is thick.The feature of digital filter 32 is accurately to control,
But speed is relatively slow, has time delay.The mode that this communicator uses analog filter 31 to combine with digital filter 32 processes
Noise signal, is first carried out quick extensive process by analog filter 31, and the effective waveform after processing is carried out by digital filter
Digital Discrete, accurate shaping, and add notch technology, accurately the inverted waveform of analogue noise is in the hope of offsetting to greatest extent
Noise.Additionally, the method using digital filter 32 on the basis of analog filter 31 solves the filtering of direct Applied Digital
The speed that device 32 causes is slow, the problem that operand is big, and Fast Convergent reduces the power consumption of chip.
As it is shown on figure 3, mixer circuit 33 is made up of two low pressure drop diodes.The positive pole of two diodes 331,332 divides
Lian Jie the inverse noise signal output part of digital filter 32 and the audio signal output end of mainboard 2；Two diodes
The negative pole of 331,332 is connected with speaker 1.Mixer circuit 33 inverse noise signal is superposed with audio signal mixing after export to
Speaker 1 is play.It is worthy of note, the diode constituting above-mentioned mixer circuit 33 must be low pressure drop diode, otherwise can
Affect the quality of audio signal and the effect of noise reduction.The tube voltage drop of diode is more preferably less than 0.1V.If additionally, being not provided with above-mentioned
Mixer circuit, but inverse noise signal and audio signal are directly mixed at speaker 1, then the impedance of speaker 1 self
Mixing can be made inoperative, i.e. cannot realize noise reduction.The mixer circuit 33 using said structure carries out audio mixing, significantly reduces
Power consumption, its power consumption is 1/10th of conventional power amplifier noise reduction mode.
In order to realize more preferable noise reduction, the acoustic features of speaker 1 should be specifically designed, and makes itself and noise reduction panel 3
Noise processed parameter attribute to coupling.Fig. 4 shows the acoustic features curve of speaker 1 in some embodiments.
In certain embodiments, when communicator is mobile phone, for realizing more preferable communication effect, carry out noise reduction process
Speaker is preferably earpiece.
In certain embodiments, noise reduction panel 3 is provided with on-off circuit control noise reduction panel and starts or stops work.
This on-off circuit is connected with mainboard 2, and when there being audio signal to export to speaker 1 in mainboard 2, mainboard 2 controls on-off circuit and closes
Closing, noise reduction panel 3 is started working.When in mainboard 2, no audio signal exports to speaker 1, mainboard 2 controls on-off circuit and breaks
Opening, noise reduction panel 3 quits work.
To sum up, communicator is under talking state, and mainboard 2 needs the audio signal received by communicator to speaker 1
Output, now mainboard 2 controls on-off circuit Guan Bi, and audio signal is exported to speaker 1, noise reduction by noise reduction panel 3
Panel 3 is started working.
Its noise-reduction method comprises the following steps:
The environment noise that Noise Acquisition device is collected by S1: noise reduction panel by analog filter, digital filter is believed
Number carrying out reverse process obtains inverse noise signal；
The audio signal that inverse noise signal and mainboard export is carried out stereo process by S2: the mixer circuit of noise reduction panel
Obtain audio signal；
S3: the audio signal output that step S2 is obtained by noise reduction panel, to speaker 1, produces inverse noise sound wave, instead
Offset with environment noise to noise, thus realize noise reduction.
When communication device plays music or broadcast by speaker, when the method for work of noise reduction panel and above-mentioned call
Noise reduction method of work identical.
The communicator of the present invention is to reduce even to eliminate the background noise in environment, have employed feed forward control techniques, mould
Intend exact depth filtering technique and audio mixing technology that wave filter combines with digital filter, be effectively improved the degree of depth of noise reduction
And width.Do not change the efficient voice quality of speaker output, it is achieved while high-quality call, also there is super low-power consumption simultaneously
Feature, do not increase the load of communicator battery.
It should be understood that above example only have expressed the preferred embodiment of the present invention, it describes more concrete and detailed
Carefully, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention；It should be pointed out that, for the common skill of this area
For art personnel, without departing from the inventive concept of the premise, above-mentioned technical characterstic can be carried out independent assortment, it is also possible to do
Going out some deformation and improvement, these broadly fall into protection scope of the present invention；Therefore, all done with scope of the invention as claimed
Equivalents and modification, all should belong to the covering scope of the claims in the present invention.
Claims (10)
1. there is a communicator for speaker decrease of noise functions, including speaker (1) and mainboard (2), it is characterised in that also wrap
Including: Noise Acquisition device (4) and noise reduction panel (3), described noise reduction panel (3) is connected to described Noise Acquisition device (4), described
Speaker (1) and described mainboard (2), for the noise signal that described Noise Acquisition device (4) gathers being carried out reverse process, and will
Noise signal after described reverse process and the audio signal from described mainboard (2) carry out output extremely described speaker after audio mixing
(1)。
Communicator the most according to claim 1, it is characterised in that described noise reduction panel (3) includes and described noise
Harvester (4) is connected to be amplified the noise signal that described Noise Acquisition device (4) gathers and reverse process obtains reversely
The wave filter of noise signal.
Communicator the most according to claim 2, it is characterised in that described wave filter includes analog filter (31), institute
Stating analog filter (31) is to have to amplify and the low pass filter of reverse module.
Communicator the most according to claim 3, it is characterised in that described wave filter also includes and described analog filter
(31) digital filter (32) being modified by the inverse noise signal that described analog filter (31) exports it is connected to.
Communicator the most according to claim 4, it is characterised in that described digital filter (32) includes trap module.
Communicator the most according to claim 2, it is characterised in that described noise reduction panel (3) also includes for audio mixing
The mixer circuit (33) processed, described mixer circuit includes two separate diodes (331,332), said two two pole
The positive pole of pipe (331,332) connects inverse noise signal output part and the audio frequency of described mainboard (2) of described wave filter respectively
Signal output part；The negative pole of said two diode (331,332) is connected with described speaker (1).
Communicator the most according to claim 6, it is characterised in that described diode (331,332) is that tube voltage drop is less than
The low pressure drop diode of 0.1V.
Communicator the most according to claim 1, it is characterised in that described Noise Acquisition device (4) is silicon microphone.
Communicator the most according to claim 1, it is characterised in that described noise reduction panel (3) also includes and described master
The on-off circuit that plate (2) connects, described mainboard (2) controls described noise reduction panel (3) by described on-off circuit and starts or stop
Only work.
10. the speaker noise-reduction method of a communicator, it is characterised in that described communicator includes noise reduction panel (3)
And be connected with described noise reduction panel (3) speaker (1), mainboard (2), Noise Acquisition device (4), the method includes following step
Rapid:
The ambient noise signal that described Noise Acquisition device collects is carried out reverse process and obtains reversely by S1: described noise reduction panel
Noise signal；
The audio signal that described inverse noise signal and described mainboard export is carried out stereo process and obtains by S2: described noise reduction panel
To audio signal；
The output of described audio signal to described speaker, is produced inverse noise sound wave by S3: described noise reduction panel, described reversely
Noise offsets with described environment noise, thus realizes noise reduction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610460703.1A CN106161780A (en) | 2016-06-22 | 2016-06-22 | There is communicator and the noise-reduction method thereof of speaker decrease of noise functions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610460703.1A CN106161780A (en) | 2016-06-22 | 2016-06-22 | There is communicator and the noise-reduction method thereof of speaker decrease of noise functions |
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| CN106161780A true CN106161780A (en) | 2016-11-23 |
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| CN201610460703.1A Pending CN106161780A (en) | 2016-06-22 | 2016-06-22 | There is communicator and the noise-reduction method thereof of speaker decrease of noise functions |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017219297A1 (en) * | 2016-06-22 | 2017-12-28 | 深圳市九霄环佩科技有限公司 | Communication device having speaker noise reduction function and noise reduction method thereof |
| CN107958671A (en) * | 2017-11-22 | 2018-04-24 | 广州市六体智能科技有限公司 | A kind of echo cancelling device of law-enforcing recorder |
| CN111294447A (en) * | 2020-02-17 | 2020-06-16 | Oppo广东移动通信有限公司 | Noise reduction method and device, electronic equipment and storage medium |
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| KR20150018052A (en) * | 2013-08-09 | 2015-02-23 | 김태환 | Noise cancellation module and how to implement it using the phone device for ships |
| CN104717588A (en) * | 2015-02-09 | 2015-06-17 | 深圳航天金悦通科技有限公司 | Low-power-consumption in-ear type active noise reduction earphone and noise reduction method |
| CN105103219A (en) * | 2013-11-11 | 2015-11-25 | 赵春宁 | Noise reduction method |
-
2016
- 2016-06-22 CN CN201610460703.1A patent/CN106161780A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20150018052A (en) * | 2013-08-09 | 2015-02-23 | 김태환 | Noise cancellation module and how to implement it using the phone device for ships |
| CN105103219A (en) * | 2013-11-11 | 2015-11-25 | 赵春宁 | Noise reduction method |
| CN104717588A (en) * | 2015-02-09 | 2015-06-17 | 深圳航天金悦通科技有限公司 | Low-power-consumption in-ear type active noise reduction earphone and noise reduction method |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017219297A1 (en) * | 2016-06-22 | 2017-12-28 | 深圳市九霄环佩科技有限公司 | Communication device having speaker noise reduction function and noise reduction method thereof |
| CN107958671A (en) * | 2017-11-22 | 2018-04-24 | 广州市六体智能科技有限公司 | A kind of echo cancelling device of law-enforcing recorder |
| CN107958671B (en) * | 2017-11-22 | 2021-04-13 | 广州市六体智能科技有限公司 | Echo cancellation device of law enforcement recorder |
| CN111294447A (en) * | 2020-02-17 | 2020-06-16 | Oppo广东移动通信有限公司 | Noise reduction method and device, electronic equipment and storage medium |
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Address after: Nanshan District Shenzhen City, Guangdong province 518000 Shennan Road No. 11018 building 12F Grand View Applicant after: Shenzhen City Jin Yuetong Intelligent Technology Co Ltd Address before: Nanshan District Shenzhen City, Guangdong province 518000 Shennan Road No. 11018 building 12F Grand View Applicant before: SHENZHEN JINYUETONG ROBOT TECHNOLOGY CO., LTD. |
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Effective date of registration: 20171219 Address after: 518000 Guangdong city of Shenzhen province Nanshan District Nantou street, No. 11018 Shennan Avenue, grand view building 12-H Applicant after: Shenzhen jiuxiao huanpei Technology Co., Ltd. Address before: Nanshan District Shenzhen City, Guangdong province 518000 Shennan Road No. 11018 building 12F Grand View Applicant before: Shenzhen City Jin Yuetong Intelligent Technology Co Ltd |
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