CN102340565B - De-noising assembly - Google Patents
De-noising assembly Download PDFInfo
- Publication number
- CN102340565B CN102340565B CN201110189891.6A CN201110189891A CN102340565B CN 102340565 B CN102340565 B CN 102340565B CN 201110189891 A CN201110189891 A CN 201110189891A CN 102340565 B CN102340565 B CN 102340565B
- Authority
- CN
- China
- Prior art keywords
- low
- noising
- switch
- filtering module
- unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Telephone Function (AREA)
- Circuit For Audible Band Transducer (AREA)
Abstract
The invention provides a de-noising assembly comprising two microphones, a de-noising treatment unit respectively and electrically connected with the microphones, a signal amplification unit used for amplifying signals and a low-pass filter unit electrically connected with the signal amplification unit. The de-noising treatment unit comprises a delay treatment unit used for delaying signals and a subtractor used for overlapping signals. The low-pass filter unit is provided with a first low-pass filter module and a second low-pass filter module, wherein the first and the second low-pass filter modules are respectively and electrically connected with the signal amplification unit. The de-noising assembly is further provided with a first switch and a second switch. Compared with related technologies, the de-noising assembly disclosed by the invention has consistent frequency response to the same voice signal under different call modes and has good call quality.
Description
[technical field]
The present invention relates to a kind of de-noising assembly, relate in particular to a kind of de-noising assembly that is used in portable communications product.
[background technology]
Development along with wireless telecommunications, Global Mobile Phone Users is more and more, user is not only satisfied with call to the requirement of mobile phone, and want to provide high-quality communication effect, especially at present the development of Technology of Mobile Multimedia, the speech quality of mobile phone becomes more important, and therefore, the de-noising assembly being used in the communication product that mobile phone etc. is relevant is developed rapidly.
The device assembly that disappears of correlation technique comprises microphone, the denoising Processing unit being electrically connected to described microphone and the filter unit being electrically connected to described denoising Processing unit.
Take mobile phone as example, and mobile phone communication has two kinds of patterns---de-noising answer mode and direct mode operation (hands-free mode).When people use the mobile phone of the de-noising assembly that has used correlation technique, if use de-noising answer mode, described de-noising assembly has carried out exporting de-noising voice signal after dual microphone denoising Processing to audio signal, after the de-noising now obtaining, voice signal can be decayed, therefore voice signal after de-noising is carried out to frequency response curve compensation by filter unit, make so not sounding decay of voice signal after de-noising.Now the gain coefficient of filter unit and compensating for frequency response are set constant.
Yet, the line control earphone assembly of correlation technique is only provided with a filter unit, and when using direct mode operation, described de-noising assembly can not carry out denoising Processing to voice signal, single microphone is directly exported after gathering voice signal, can not have the problem of signal attenuation.But during voice signal output, also passed through this filter unit, at this moment made on the contrary it to decay.
Such as audio signal in the frequency response at 500Hz, 1kHz, 2kHz place is all-40dB respectively, after dual microphone denoising Processing, can become-80dB ,-60dB ,-40dB, this just must use be compensated for as-40dB of low pass filter ,-40dB ,-40dB.Be equivalent to, at 500Hz place, frequency response has been improved to 40dB, 1kHz has improved 20dB in place.But the output of the direct mode operation of single microphone also must be through this filter, and its output just becomes 0dB ,-20dB ,-40dB.So while having used the mobile phone of the de-noising assembly of correlation technique to converse under two kinds of different conditions, the frequency response of the voice signal of its output is different, and then draws and affected speech quality.
Therefore, being necessary to propose a kind of new de-noising assembly in fact addresses the above problem.
[summary of the invention]
The technical problem that the present invention need solve be to provide a kind of under different call modes to the consistent de-noising assembly of the frequency response of same voice signal.
According to above-mentioned technical problem, designed a kind of de-noising assembly, its objective is such realization: a kind of de-noising assembly, it comprises two microphones, the denoising Processing unit that is electrically connected to respectively with described microphone, the low-pass filter unit that signal is carried out to amplifying signal amplifying unit and is electrically connected to described signal amplification unit.Described denoising Processing unit comprises the subtrator that makes the delay disposal unit of signal delay and make signal stack.Wherein, described low-pass filter unit is provided with the first low-pass filtering module and the second low-pass filtering module, and described the first low-pass filtering module and described the second low-pass filtering module are electrically connected to described signal amplification unit respectively.Described de-noising assembly is also provided with the first switch and second switch, and described the first switch series is associated between described delay disposal unit and described subtrator, and described second switch is serially connected between described signal amplification unit and described low-pass filter unit.
Preferably, described second switch is a group selection switch.
Compare with correlation technique, de-noising assembly of the present invention frequency response to same voice signal under different call modes is consistent, and speech quality is good.
[accompanying drawing explanation]
Fig. 1 is the theory diagram of de-noising assembly of the present invention.
Fig. 2 is de-noising assembly of the present invention frequency response curve figure to same voice signal under two kinds of different call modes.
[embodiment]
Below in conjunction with drawings and embodiments, the invention will be further described.
As shown in Figure 1, a kind of de-noising assembly 1, it comprises two microphones 2, the denoising Processing unit 3 being electrically connected to respectively with microphone 2, the low-pass filter unit 5 that signal is carried out to amplifying signal amplifying unit 4 and is electrically connected to signal amplification unit 4.Denoising Processing unit 3 comprises the delay disposal unit 31 that makes signal delay and the subtrator 32 that makes signal stack.Wherein, low-pass filter unit 5 is provided with the first low-pass filtering module 51 and the second low-pass filtering module 52, the first low-pass filtering modules 51 and the second low-pass filtering module 52 and is electrically connected to signal amplification unit 4 respectively.
De-noising assembly 1 is also provided with the first switch 33 and second switch 34, the first switches 33 are connected between delay disposal unit 31 and subtrator 32, and second switch 34 is serially connected between signal amplification unit 4 and low-pass filter unit 5.More excellent, second switch 34 is a group selection switch.So in the present embodiment, selector switch can selectivity be connected signal amplification unit 4 respectively with the first low-pass filtering module 51 and the second low-pass filtering module 52, when selector switch is connected signal amplification unit 4 and the first low-pass filtering module 51, it disconnects with the second low-pass filtering module 52, when selector switch itself and first low-pass filtering module 51 disconnections during with the second low-pass filtering module 52 connection by signal amplification unit 4.In fact, second switch 34 can be also two single knife switches of connecting with the first low-pass filtering module 51 and the second low-pass filtering module 52 respectively, and this is also feasible, but its principle is all the same.
In present embodiment, take mobile phone as example, de-noising assembly 1 of the present invention is used in mobile phone, concrete, when handset-selected while conversing with de-noising answer mode, the first switch 33 closures, second switch 34 and the first low-pass filtering module 51 are connected.Audio signal is after the first microphone 21 and second microphone 22 gather, to be input to denoising Processing unit 3 to carry out denoising Processing by 2 microphones.Wherein, the delayed audio signal unit 31 processing audio signals rear and that second microphone 22 gathers that the first microphone 21 collects are jointly input to and obtain subtrator 32, obtain voice signal after de-noising, after de-noising, voice signal amplifies through signal amplification unit 4, be amplified rear voice signal, after amplifying, voice signal is input to the first low-pass filtering module 51, through the first low-pass filtering module 51, it is carried out exporting after compensating for frequency response.
When handset-selected, while conversing with hands-free mode, press after Hands-free key, the first switch 33 disconnects, second switch 34 and the second low-pass filtering module 52 connections.Now, the first microphone 21 is not worked, and only has the audio signal that second microphone 22 collects to export.The audio signal that second microphone 22 collects is input to the second low-pass filtering module 52, output after through the second low-pass filtering module 52, its filtering of advancing being processed.
Now, under two kinds of call modes, to the frequency response of same audio signal, be consistent, as shown in Figure 2, wherein, curve a is the frequency response curve under hands-free answer mode to frequency response curve, curve b is the frequency response curve under de-noising answer mode.Certainly, first gain coefficient of low-pass filtering module 51 and the setting of penalty coefficient are different from second gain coefficient of low-pass filtering module 52 and the setting of penalty coefficient, but coefficient separately is all fixed.
Compare with correlation technique, de-noising assembly of the present invention has been set up filtration module and selector switch, under different call modes, by selector switch, selecting to connect different filter circuits exports, thereby make under different call modes described de-noising assembly consistent to the frequency response curve of same audio signal, and then improved speech quality.
Above-described is only embodiments of the present invention, at this, it should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise of the invention, can also make improvement, but these all belongs to protection scope of the present invention.
Claims (1)
1. a de-noising assembly, it is applied in mobile device, comprise two microphones, the denoising Processing unit being electrically connected to respectively with described microphone, the low-pass filter unit that signal is carried out to amplifying signal amplifying unit and is electrically connected to described signal amplification unit, described denoising Processing unit comprises the subtrator that makes the delay disposal unit of signal delay and make signal stack, it is characterized in that: described low-pass filter unit is provided with the first low-pass filtering module and the second low-pass filtering module, described the first low-pass filtering module is different from gain coefficient and the penalty coefficient of the second low-pass filtering module, described the first low-pass filtering module and described the second low-pass filtering module are electrically connected to described signal amplification unit respectively, described de-noising assembly is also provided with the first switch and second switch, described the first switch series is associated between described delay disposal unit and described subtrator, described second switch is connected between described signal amplification unit and described low-pass filter unit, described second switch is a group selection switch, when the first switch is closed, second switch and the first low-pass filtering module are connected, the de-noising call mode of corresponding mobile device, when the first switch disconnects, second switch and the second low-pass filtering module are connected, the hands-free mode of corresponding mobile device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110189891.6A CN102340565B (en) | 2011-07-07 | 2011-07-07 | De-noising assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110189891.6A CN102340565B (en) | 2011-07-07 | 2011-07-07 | De-noising assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102340565A CN102340565A (en) | 2012-02-01 |
| CN102340565B true CN102340565B (en) | 2014-02-26 |
Family
ID=45516060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110189891.6A Expired - Fee Related CN102340565B (en) | 2011-07-07 | 2011-07-07 | De-noising assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102340565B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107682529B (en) * | 2017-09-07 | 2019-11-26 | 维沃移动通信有限公司 | A kind of acoustic signal processing method and mobile terminal |
| CN107705797B (en) * | 2017-10-18 | 2020-12-22 | 四川蜀天信息技术有限公司 | Intelligent mobile communication system and operation method |
| CN109450237B (en) * | 2018-10-31 | 2020-07-07 | Oppo广东移动通信有限公司 | Signal processing circuit, radio frequency circuit, communication apparatus, and signal processing method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030038069A (en) * | 2001-11-08 | 2003-05-16 | 엘지전자 주식회사 | noise elimination system of the telephone handset and controlling method therefore |
| CN1798181A (en) * | 2004-12-29 | 2006-07-05 | 乐金电子(中国)研究开发中心有限公司 | Terminal denoise device for voice communication |
| CN101848288A (en) * | 2010-04-19 | 2010-09-29 | 北京东微世纪科技有限公司 | Simulation noise reduction system and method for microphone |
| CN101959099A (en) * | 2010-04-12 | 2011-01-26 | 瑞声声学科技(深圳)有限公司 | Directional microphone device |
| CN101989431A (en) * | 2009-07-31 | 2011-03-23 | 深圳富泰宏精密工业有限公司 | Device and method for eliminating noise |
-
2011
- 2011-07-07 CN CN201110189891.6A patent/CN102340565B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030038069A (en) * | 2001-11-08 | 2003-05-16 | 엘지전자 주식회사 | noise elimination system of the telephone handset and controlling method therefore |
| CN1798181A (en) * | 2004-12-29 | 2006-07-05 | 乐金电子(中国)研究开发中心有限公司 | Terminal denoise device for voice communication |
| CN101989431A (en) * | 2009-07-31 | 2011-03-23 | 深圳富泰宏精密工业有限公司 | Device and method for eliminating noise |
| CN101959099A (en) * | 2010-04-12 | 2011-01-26 | 瑞声声学科技(深圳)有限公司 | Directional microphone device |
| CN101848288A (en) * | 2010-04-19 | 2010-09-29 | 北京东微世纪科技有限公司 | Simulation noise reduction system and method for microphone |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102340565A (en) | 2012-02-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104521247B (en) | Bluetooth headset hearing aid and anti-noise method and apparatus | |
| CN104935742B (en) | Communication terminal and the method for improving its tonequality under handset mode | |
| CN202872884U (en) | Audio output circuit and mobile terminal | |
| CN103716459B (en) | A kind of audio system having mobile phone and intercom call function concurrently | |
| US8630405B2 (en) | Echo removing apparatus | |
| CN102857598A (en) | Control method for eliminating noise of double microphones of cellphone automatically and cellphone utilizing control method | |
| CN102724360B (en) | Method and device for implementation of hearing-aid function of mobile phone and hearing-aid mobile phone | |
| CN102223428A (en) | Noise reducing method and mobile terminal | |
| CN103945026A (en) | Mobile terminal | |
| CN106790882A (en) | Communication Dolby circuit and noise-reduction method | |
| WO2009070073A8 (en) | A method and arrangement for echo cancellation of voice signals | |
| CN104717594A (en) | Hearing-aid system, hearing-aid mobile phone and hearing-aid method thereof | |
| CN105228055A (en) | Audio bass bucking-out system and compensation method thereof | |
| CN102340565B (en) | De-noising assembly | |
| CN201491082U (en) | Mobile phone | |
| CN106792368A (en) | A kind of multi-mode plays the terminal of voice signal | |
| CN203968327U (en) | A kind of exempt from extract carry out low coverage dialogue earphone | |
| CN201328172Y (en) | Audio play device and terminal | |
| CN207150784U (en) | Keyword unlocking type transparent transmission earphone | |
| CN201708849U (en) | Mobile phone with hearing aid function | |
| CN201383326Y (en) | Noise reduction device of mobile phone | |
| CN203151729U (en) | Multifunctional earphone | |
| CN205864519U (en) | VOX double MIC calibration optimizes circuit | |
| CN106373586A (en) | Noise filtering circuit | |
| CN201893928U (en) | Hearing aid with bluetooth communication function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 518057 Nanshan District hi tech Industrial Park, Shenzhen, North West New West Road, No. Rui sound technology building, No. 18 Co-patentee after: AAC TECHNOLOGIES (NANJING) Co.,Ltd. Patentee after: AAC ACOUSTIC TECHNOLOGIES (SHENZHEN) Co.,Ltd. Co-patentee after: AAC Acoustic Technologies (Changzhou) Co.,Ltd. Address before: 518057 Nanshan District hi tech Industrial Park, Shenzhen, North West New West Road, No. Rui sound technology building, No. 18 Co-patentee before: AAC Acoustic Technology Research Development (Nanjing) Co.,Ltd. Patentee before: AAC ACOUSTIC TECHNOLOGIES (SHENZHEN) Co.,Ltd. Co-patentee before: AAC Acoustic Technologies (Changzhou) Co.,Ltd. |
|
| CP03 | Change of name, title or address | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170602 Address after: Singapore Ang Mo Kio 65 Street No. 10 techpoint Building 1 floor, No. 8 Co-patentee after: AAC TECHNOLOGIES (NANJING) Co.,Ltd. Patentee after: AAC TECHNOLOGIES Pte. Ltd. Co-patentee after: AAC Acoustic Technologies (Changzhou) Co.,Ltd. Address before: 518057 Nanshan District hi tech Industrial Park, Shenzhen, North West New West Road, No. Rui sound technology building, No. 18 Co-patentee before: AAC TECHNOLOGIES (NANJING) Co.,Ltd. Patentee before: AAC ACOUSTIC TECHNOLOGIES (SHENZHEN) Co.,Ltd. Co-patentee before: AAC Acoustic Technologies (Changzhou) Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140226 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |