CN1893473A - Click noise remove apparatus and method for mobile communication device - Google Patents
Click noise remove apparatus and method for mobile communication device Download PDFInfo
- Publication number
- CN1893473A CN1893473A CNA2006100671514A CN200610067151A CN1893473A CN 1893473 A CN1893473 A CN 1893473A CN A2006100671514 A CNA2006100671514 A CN A2006100671514A CN 200610067151 A CN200610067151 A CN 200610067151A CN 1893473 A CN1893473 A CN 1893473A
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- audio
- frequency amplifier
- audio frequency
- noise
- mobile communication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/401—Circuits for selecting or indicating operating mode
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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
- H04R1/00—Details of transducers, loudspeakers or microphones
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Telephone Function (AREA)
- Amplifiers (AREA)
Abstract
A click noise remove apparatus and method thereof for mobile communication terminal which relates to noise remove technique field for mobile communication terminal is disclosed. The mobile communication terminal comprises an audio switch, an audio amplifier, a dual mode speaker, wherein the audio switch and the audio amplifier are connected with controlling ports respectively, the device further comprises a control part for switching off the click noise output by controlling the output path of the audio switch and switch of the audio amplifier. The click noise remove method provided for mobile communication terminal includes the following steps: a step for loading a stored starting procedure when starting the terminal; a step for starting the audio switch by the starting procedure to make the audio amplifier an output path; a step for shutting down the audio amplifier when switching acts; a step for initializing the sound/audio encoder and decoder in the control part after the step of shutting down the audio amplifier. The audio output path effect can be easily controlled.
Description
Technical field
The invention belongs to the Noise cancellation technology of mobile communication terminal, eliminate the interior noise (clicking noise) that is taken place in initialization control part (MSM) process when particularly the mobile communication terminal that possesses unidirectional dual mode speaker being started thus prevent that it from outputing to outside a kind of mobile communication terminal click noise absorber and method.
Background technology
The noise that generates with " click clatter " noise form when clicking noise (Click Noise) and being meant the power supply of unlatching (ON) audio devices, and be mobile communication terminal, be meant in the initialization procedure of startup control system portion (MSM), when the sound/audio codec in the above-mentioned control part (MSM) is carried out initialization, the interior noise that generates outputed to the outside and the noise that takes place.
Mobile communication terminal in the past, for the output the tinkle of bells has used buzzer, and on circuit, separate, therefore click noise and can not export with the receiver of output conversation voice, output to the outside even click noise by receiver, its sound is very faint and can not become big problem.
But, recently,, unidirectional dual mode speaker has been installed for improving the space utilization degree of mobile communication terminal, the therefore above-mentioned noise of clicking arrives outside by dual mode speaker with sizable voice output.
Summary of the invention
For solving above-mentioned problem in the past, what the object of the present invention is to provide a kind of mobile communication terminal clicks noise absorber and method.This device can be when starting the mobile communication terminal that possesses unidirectional dual mode speaker, eliminates the interior noise (clicking noise) that is taken place in the initialization control part process and prevent that it from outputing to the outside.
Realize the cancellation element of clicking noise of mobile communication terminal, comprise: the audio switch of selecting the audio frequency outgoing route, amplify the audio frequency amplifier of the audio signal of output audio switch input, with the dual mode speaker of actual sound output by the audio signal of above-mentioned audio frequency amplifier or audio switch input, it is characterized in that: above-mentioned audio switch and audio frequency amplifier are connected to the control port separately, but also comprise control part, it cuts off the output of clicking noise by the ON/OFF of the outgoing route and the above-mentioned audio frequency amplifier of control of the above-mentioned audio switch of control.
The method of canceling noise of clicking of described mobile communication terminal is control audio switch and an audio frequency amplifier and cut off the audio frequency outgoing route of loud speaker when starting mobile communication terminal.This method is made up of following several stages, thus the output of clicking noise that is generated when cutting off initialization sound/audio codec.These stages are: load the stage of having preserved start-up routine when starting terminal; Thereby open audio switch according to above-mentioned start-up routine and make the stage of audio frequency amplifier as outgoing route; When carrying out above-mentioned switch motion, close the stage of audio frequency amplifier; After closing above-mentioned audio frequency amplifier the sound/audio codec in the control part is carried out the initialized stage.
The invention has the beneficial effects as follows by mobile communication terminal click noise absorber and method, can independent control terminal audio output interface be audio switch and audio frequency amplifier, therefore have the effect of easy control audio outgoing route.
And, the closing motion of audio frequency amplifier of the present invention can be independent of the audio frequency outgoing route direction of setting according to the ON/OFF action of audio switch, therefore prevent that the noise of clicking that is input to audio frequency amplifier from directly outputing to dual mode speaker, have and cut off the effect of clicking the outside output of noise.
In addition, the present invention has cut off the output of clicking noise according to simple circuit change, thereby has improved the quality satisfaction of user to terminal, and has mentioned the reliability to terminal thing dealer.
Description of drawings
Fig. 1 was for possessed the mobile communication terminal structured flowchart of unidirectional dual mode speaker in the past.
Fig. 2 is the structure chart that noise outputs to outside mobile communication terminal that prevents to click of the present invention.
Fig. 3 possess for the present invention unidirectional dual mode speaker mobile communication terminal click the method for canceling noise precedence diagram.
The symbol description of accompanying drawing major part
101: control part 102: audio switch 103: audio frequency amplifier 104: dual mode speaker
Embodiment
What the invention provides a kind of mobile communication terminal clicks noise absorber and method.Below by the contrast of Fig. 1 and Fig. 2, describe embodiments of the invention in detail.
At first, Fig. 1 was for possessed the mobile communication terminal structured flowchart of unidirectional dual mode speaker in the past.At this, control part 101 divides the tinkle of bells and conversation voice to export in the incoming call time zone, and carries out suitable audio frequency outgoing route switching function.
Afterwards, under the control of above-mentioned control part 101, audio switch 102 is in upstate when terminal being carried out initialization and output the tinkle of bells, thereby will be made as the audio frequency outgoing route by the path of audio frequency amplifier 103 and dual mode speaker 104, and when the output conversation voice, audio switch 102 is in down state, thereby dual mode speaker 104 is made as the audio frequency outgoing route.Audio frequency amplifier 103 is connected in the available terminal of above-mentioned audio switch 102, when but above-mentioned 102 time spent of audio switch audio frequency amplifier 103 also together becomes upstate, thereby amplify the tinkle of bells that receives by above-mentioned audio switch 102, and it is outputed to dual mode speaker 104.And when above-mentioned audio switch 102 was unavailable, audio frequency amplifier 103 together became unavailable, thereby prevents the amplification output of conversation voice.
That is, when the output the tinkle of bells,, and when the output conversation voice,, directly export to dual mode speaker 104 from audio switch 102 without audio frequency amplifier 103 by the tinkle of bells of audio frequency amplifier 103 to dual mode speaker 104 output amplifications.
And dual mode speaker 104 does not need other chip and combines the loud speaker of music, the tinkle of bells dedicated speakers and output conversation voice, has therefore reduced volume to greatest extent, and has realized the conversation voice and the tinkle of bells of high tone quality with a loud speaker.
But, the available terminal of audio switch 102 and audio frequency amplifier 103 was to be connected jointly in the past, the control of the ON/OFF of audio switch 102 always is not set at dual mode speaker 104 the audio frequency outgoing route with regard to playing effect like this, therefore, exists output to click the problem of noise.
That is, when opening above-mentioned audio switch 102, the noise of clicking that amplifies by audio frequency amplifier 103 outputs to dual mode speaker 104, and when closing audio switch, clicks noise directly to dual mode speaker 104 outputs.
As shown in Figure 2, the present invention independently controls above-mentioned audio switch 102 and audio frequency amplifier 103, thereby when carrying out initialization, open audio switch 102, even audio frequency amplifier 103 is set at the audio frequency outgoing route, as long as close audio frequency amplifier 103, clicking noise just can not be to dual mode speaker 104 output.
Fig. 2 is the structure chart that noise outputs to outside mobile communication terminal that prevents to click of the present invention.With shown in Figure 1 when terminal structure compares in the past, control part 101 connects respectively can control audio switch 102 and GPIO (the General Purpose I/O) port of audio frequency amplifier 103.That is, the ON/OFF control of audio frequency amplifier 103 is independent of the ON/OFF control of audio switch 102.
In other words, the present invention respectively distributes to the available terminal of audio switch 102 and audio frequency amplifier 103 with the GPIO port of control part 101 and is connected, when above-mentioned control part 103 is carried out initialization, open audio switch 102 before at the sound/audio codec (not shown) that starts inside, thereby the noise of clicking that generates in tut/audio codec is exported to audio frequency amplifier 103, at this moment close audio frequency amplifier 103, therefore clicking noise just can't be from 104 output of terminal dual mode speaker.
The control of above-mentioned audio switch 102 and audio frequency amplifier 103 is software realizations, below with reference to the precedence diagram of Fig. 3 its process is described.
Fig. 3 possess for the present invention unidirectional dual mode speaker mobile communication terminal click the method for canceling noise precedence diagram.Clicking noise is in the startup execution phase of terminal each construction module in the control part 101 to be carried out in the initialized process, take place during initialization sound/audio codec, thus therefore before initialization tut/audio codec control audio switch 102 and audio frequency amplifier 103 cut off the outside output of clicking noise.
With reference to Fig. 3, terminal connects power supply and (step S101 when beginning to start, S102), control part 101 loads the start-up routine (step S103) that has been kept at internal storage (not shown), and the various functional modules (not shown) in terminal and the control part 101 are carried out initialization (step S104).
In said process, audio switch 102 of the present invention and audio frequency amplifier 103 are controlled.Promptly, open audio switch 102, thereby audio frequency amplifier 103 is become from the outgoing route (step S105) of the audio frequency of control part 101 outputs, close audio frequency amplifier 103 simultaneously, afterwards, to the sound/audio codecs (not shown) in the control part 101 carry out initialization (step S106, S107).Obtain initialized moment at sound/audio codec, click noise, but with audio frequency outgoing route changed course audio frequency amplifier 103, and close its audio frequency amplifier 103 in the present invention, click noise like this and just can not output to outside (step S108).
Certainly, tut/audio codec is carried out after the initialization, open audio frequency amplifier 103, so just can be when passing through audio switch 102 to audio frequency amplifier input the tinkle of bells, after amplifying its tinkle of bells it is outputed to dual mode speaker, and if conversation voice just directly outputs to dual mode speaker from audio switch 102.
Embodiments of the invention more than have been described with reference to the accompanying drawings.At this, employed term or vocabulary can not make an explanation with the implication that is defined on common or the dictionary in this specification and claims book, but make an explanation with implication and the notion that meets the technology of the present invention thought.
And embodiment that is put down in writing on this specification and structure shown in the drawings be the optimum embodiment of the present invention only, and can not represent technological thought of the present invention.Therefore, be the present invention, the multiple equipollent and the modified example that can replace this embodiment can be arranged.
Claims (5)
1. a mobile communication terminal clicks noise absorber, at comprising: the audio switch of selecting the audio frequency outgoing route, amplify the audio frequency amplifier of output by the audio signal of above-mentioned audio switch input, with the mobile communication terminal of actual sound output by the dual mode speaker of the audio signal of above-mentioned audio frequency amplifier or audio switch input, it is characterized in that: above-mentioned audio switch and audio frequency amplifier are connected to the control port separately, but also comprise control part, it cuts off the output of clicking noise by the ON/OFF of the outgoing route and the above-mentioned audio frequency amplifier of control of the above-mentioned audio switch of control.
Mobile communication terminal according to claim 1 click noise absorber, it is characterized in that: the port that is used to control above-mentioned audio switch and audio frequency amplifier is the I/O port of GPIO.
3. mobile communication terminal according to claim 1 clicks noise absorber, it is characterized in that: above-mentioned when clicking noise when taking place, control part is controlled audio switch, thereby make the above-mentioned noise of clicking output to audio frequency amplifier, and close above-mentioned audio frequency amplifier and cut off and click noise.
A mobile communication terminal click method of canceling noise, it is characterized in that: form by following several stages, thereby the output of clicking noise that is generated when cutting off initialization sound/audio codec; These stages are: load the stage of having preserved start-up routine when starting terminal; Thereby open audio switch according to above-mentioned start-up routine and make the stage of audio frequency amplifier as outgoing route; When carrying out above-mentioned switch motion, close the stage of audio frequency amplifier; After closing above-mentioned audio frequency amplifier the sound/audio codec in the control part is carried out the initialized stage.
Mobile communication terminal according to claim 4 click method of canceling noise, it is characterized in that: also comprise a process, i.e. process of after tut/audio codec is carried out initialization, opening audio frequency amplifier.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020050057334A KR100677469B1 (en) | 2005-06-29 | 2005-06-29 | Click noise remove apparatus and method for mobile communication device |
| KR1020050057334 | 2005-06-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1893473A true CN1893473A (en) | 2007-01-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006100671514A Pending CN1893473A (en) | 2005-06-29 | 2006-04-05 | Click noise remove apparatus and method for mobile communication device |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR100677469B1 (en) |
| CN (1) | CN1893473A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130142089A (en) * | 2012-06-18 | 2013-12-27 | 페어차일드 세미컨덕터 코포레이션 | Noise-canceling headphones with depletion-mode switch |
| CN104349246A (en) * | 2013-08-06 | 2015-02-11 | 快捷半导体(苏州)有限公司 | Audio jack system |
| US9674598B2 (en) | 2014-04-15 | 2017-06-06 | Fairchild Semiconductor Corporation | Audio accessory communication with active noise cancellation |
| CN111601217A (en) * | 2020-06-12 | 2020-08-28 | 歌尔科技有限公司 | Noise processing method for audio player, audio player and storage medium |
| CN114039619A (en) * | 2021-09-28 | 2022-02-11 | 三维通信股份有限公司 | Zero intermediate frequency radio frequency front end circuit, system, radio frequency unit protection method and medium |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101671145B1 (en) * | 2016-04-18 | 2016-10-31 | 권광일 | Melt-blown nonwoven fabric manufacturing device |
-
2005
- 2005-06-29 KR KR1020050057334A patent/KR100677469B1/en not_active IP Right Cessation
-
2006
- 2006-04-05 CN CNA2006100671514A patent/CN1893473A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130142089A (en) * | 2012-06-18 | 2013-12-27 | 페어차일드 세미컨덕터 코포레이션 | Noise-canceling headphones with depletion-mode switch |
| CN103517184A (en) * | 2012-06-18 | 2014-01-15 | 快捷半导体(苏州)有限公司 | Noise-canceling device, method and system |
| CN103517184B (en) * | 2012-06-18 | 2017-04-12 | 快捷半导体(苏州)有限公司 | Noise-canceling device, method and system |
| KR102005965B1 (en) * | 2012-06-18 | 2019-07-31 | 페어차일드 세미컨덕터 코포레이션 | Noise-canceling headphones with depletion-mode switch |
| CN104349246A (en) * | 2013-08-06 | 2015-02-11 | 快捷半导体(苏州)有限公司 | Audio jack system |
| US9674598B2 (en) | 2014-04-15 | 2017-06-06 | Fairchild Semiconductor Corporation | Audio accessory communication with active noise cancellation |
| CN111601217A (en) * | 2020-06-12 | 2020-08-28 | 歌尔科技有限公司 | Noise processing method for audio player, audio player and storage medium |
| CN114039619A (en) * | 2021-09-28 | 2022-02-11 | 三维通信股份有限公司 | Zero intermediate frequency radio frequency front end circuit, system, radio frequency unit protection method and medium |
Also Published As
| Publication number | Publication date |
|---|---|
| KR100677469B1 (en) | 2007-02-02 |
| KR20070001710A (en) | 2007-01-04 |
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