CN103024631A - Method and device of noise reduction of earphone - Google Patents
Method and device of noise reduction of earphone Download PDFInfo
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- CN103024631A CN103024631A CN2012105530467A CN201210553046A CN103024631A CN 103024631 A CN103024631 A CN 103024631A CN 2012105530467 A CN2012105530467 A CN 2012105530467A CN 201210553046 A CN201210553046 A CN 201210553046A CN 103024631 A CN103024631 A CN 103024631A
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Abstract
The invention discloses a method and a device of noise reduction of an earphone. The method of the noise reduction of the earphone includes that a mobile terminal obtains environment noise; the mobile terminal generates a signal with the same amplitude and the opposite phase of the noise; and the mobile terminal outputs the signal through the earphone when outputs voice frequency. According to the method and the device of the noise reduction of the earphone, a general earphone can achieve an effect of the noise reduction without being added with a noise reduction module.
Description
Technical field
The present invention relates to moving communicating field, relate in particular to a kind of earphone noise-reduction method and device.
Background technology
A kind of mobile phone is arranged in the prior art, and this mobile phone can filter the environmental noise in the sound that sends in communication process.This technology only is that the sound that will send filters, and can not reduce the noise that this cellie's ear receives.
Noise cancellation method is designed to by using audio-frequence player device (being earphone) to reduce undesired ambient sound.Ambient sound is called as the background sound that occurs in any given position and arbitrarily downgrades.In order to design noise canceling system, go out to launch certain acoustic signals at earphone, thereby eliminate ambient noise.This earphone is called as the earplug/earphone with active noise reduction function, at present, many these class earplug/earphones is being arranged on the market, but all be earphone itself integrated noise reduction module, cost is higher.In addition, need additional battery power supply, cause that price is high, weight is large.
Summary of the invention
The object of the present invention is to provide earphone noise-reduction method and device, can be so that in the situation that common earphone is not increased noise reduction module, also reach the effect of noise reduction.
For reaching this purpose, according to an aspect of the present invention, provide a kind of earphone noise-reduction method, the method comprises: portable terminal obtains the noise in the environment; Described portable terminal generation is identical with described noise amplitude, the signal of single spin-echo; Described portable terminal is exported described signal when output audio by earphone.
Preferably, the described noise that obtains in the environment of described portable terminal comprises: described portable terminal obtains low-frequency noise in the environment that people's ear can hear by microphone.
Preferably, described microphone comprise following one of at least: the microphone in the microphone in the described portable terminal, the described earphone.
Preferably, described portable terminal produces described signal and comprises: described portable terminal with described noise transfer to Dolby circuit; Described Dolby circuit produces described signal through computing.
Preferably, described portable terminal produces described signal and comprises: described portable terminal determines that the physical attribute of described noise surpasses threshold value; Described portable terminal produces described signal.
Preferably, described physical attribute comprise following one of at least: amplitude, frequency.
Preferably, the described audio frequency of output comprise following one of at least: the music VF of described mobile terminal playing, the audio frequency of described mobile terminal call.
Preferably, described portable terminal obtains described noise and comprises: described portable terminal is determined whether the application that starts in the described portable terminal has disposed to start and is eliminated the noise function; If judged result is yes, described portable terminal obtains described noise.
According to another aspect of the present invention, also provide a kind of earphone denoising device, be applied in the portable terminal, described device comprises: obtain module, be used for obtaining the noise of environment; Generation module is for generation of signal identical with described noise amplitude, single spin-echo; Output module is used for when output audio described signal being exported by earphone.
Preferably, described acquisition module obtains low-frequency noise in the environment that people's ear can hear by microphone.
Preferably, described microphone comprise following one of at least: the microphone in the microphone in the described portable terminal, the described earphone.
Preferably, described generation module is Dolby circuit, and described Dolby circuit produces described signal through computing after receiving noise.
Preferably, described generation module comprises: determining unit is used for determining that the physical attribute of described noise surpasses threshold value; Generation unit is used for determining that at described determination module described physical attribute surpasses the described signal of generation in the situation of described threshold value.
Preferably, described physical attribute comprise following one of at least: amplitude, frequency.
Preferably, the described audio frequency of output comprise following one of at least: the music VF of described mobile terminal playing, the audio frequency of described mobile terminal call.
Preferably, described device also comprises: definite module that starts is used for determining whether the application that described portable terminal starts has disposed startup elimination noise function; Described acquisition module is used for obtaining the noise in the environment after described definite startup module determines that elimination noise function has been disposed in described application.
Description of drawings
Fig. 1 is the flow process according to the earphone noise-reduction method of the embodiment of the invention;
Fig. 2 is the flow chart of eliminating noise according to the employing Dolby circuit of the embodiment of the invention;
Fig. 3 is the flow chart that judges whether to start noise cancellation according to the embodiment of the invention;
Fig. 4 is the structured flowchart according to the earphone denoising device of the embodiment of the invention;
Fig. 5 is the preferred structure block diagram according to the earphone denoising device of the embodiment of the invention.
Embodiment
The present invention is described in further detail below in conjunction with drawings and Examples.Be understandable that specific embodiment described herein only is used for explaining the present invention, but not limitation of the invention.Also need to prove in addition, for convenience of description, only show part related to the present invention in the accompanying drawing but not entire infrastructure.
In the present embodiment, provide a kind of earphone noise-reduction method, Fig. 1 is that this flow process comprises the steps: according to the flow process of the earphone noise-reduction method of the embodiment of the invention
Step S102, portable terminal obtains the noise in the environment, preferably, the method of acquisition noise for example, can be detected by microphone in having a lot, this microphone can be that the microphone on the mobile phone can be external microphone also, hereinafter acquisition is also referred to as detecting;
Step S104, this portable terminal produce signal identical with this noise amplitude, single spin-echo;
Step S106, this portable terminal is exported this signal when output audio by earphone.
By above-mentioned steps, portable terminal can produce the signal that can eliminate noise, and, this signal output that when output audio, will produce, thus in time use common earphone also can eliminate ambient noise.In addition, owing in portable terminal, realize the inevitable easily realization of this function.
In a preferred embodiment, can only eliminate the low-frequency noise that people's ear can be heard, this low-frequency noise can be by microphone (this microphone can be the microphone in the portable terminal, also can be the microphone in the earphone) detect (frequency less than certain threshold value or within certain threshold range).
In another embodiment, producing the signal that is used for the elimination ambient noise can be produced by Dolby circuit, and namely the mode by hardware realizes, can certainly realize by the mode of software.The implementation of hardware and software can adopt various ways to realize, in any case realize all not realizations of influence technique effect.
Fig. 2 is the flow chart of eliminating noise according to the employing Dolby circuit of the embodiment of the invention, and as shown in Figure 3, this flow process comprises the steps:
Step S202, the noise in the portable terminal detecting environment;
Step S204, this portable terminal will detect noise transfer to Dolby circuit;
Step S206, this Dolby circuit produce the signal that is used for eliminating ambient noise through computing;
Step S206, this portable terminal is exported this signal when output audio by earphone.
In a preferred embodiment, portable terminal can not be all to produce in all cases the signal of eliminating ambient noise, and for example, this portable terminal can determine that the physical attribute of this noise surpasses threshold value, and in this case, this portable terminal produces this signal.Preferably, this physical attribute can comprise following one of at least: amplitude, frequency.
Fig. 3 is the flow chart that judges whether to start noise cancellation according to the embodiment of the invention, and as shown in Figure 3, this flow process comprises the steps:
Step S302 judges this portable terminal whether eliminate for needing to start noise by default configuration, preferably, can also pre-configuredly be configured respectively whether need to start the noise elimination for different functions, for example, can default configuration in conversation, start, and in the startup situation, do not start.
Step S304, if default configuration is not for starting, whether the attribute that this moment can the testing environment noise surpasses threshold value, if surpass then automatically start, otherwise does not start this function.
Above-mentioned method can be used in music playing or conversation, i.e. the audio frequency of above-mentioned output can comprise following one of at least: the music VF of this mobile terminal playing, the audio frequency of this mobile terminal call.
In another embodiment, also provide a kind of earphone denoising device, this application of installation is in portable terminal, and this device is used for realizing above-described embodiment and preferred implementation, had carried out not repeating them here of explanation.Fig. 4 is the structured flowchart according to the earphone denoising device of the embodiment of the invention, and as shown in Figure 2, this device comprises: obtain module 42, generation module 44 and output module 46.The below describes this device.
Obtain module 42, be used for obtaining the noise of environment; Generation module 44 is for generation of signal identical with this noise amplitude, single spin-echo; Output module 46 is used for when output audio this signal being exported by earphone.
Preferably, this acquisition module obtains low-frequency noise in the environment that people's ear can hear by microphone.For example, this microphone comprise following one of at least: the microphone in the microphone in this portable terminal, this earphone.
Preferably, this generation module 44 can be Dolby circuit, and this Dolby circuit produces this signal through computing after receiving noise.
Preferably, this generation module 44 can comprise: determining unit 242 is used for determining that the physical attribute of this noise surpasses threshold value; Generation unit 244 is used for determining that at this determination module this physical attribute surpasses this signal of generation in the situation of this threshold value.For example, this physical attribute comprise following one of at least: amplitude, frequency.
Preferably, in the another one preferred embodiment, Fig. 5 is the preferred structure block diagram according to the earphone denoising device of the embodiment of the invention, as shown in Figure 5, this device can also comprise determines to start module 52, definite module 52 that starts is used for determining whether the application that described portable terminal starts has disposed startup elimination noise function.At this moment, obtain module 42, be used for after determining that starting module 52 determines that elimination noise function has been disposed in described application, obtaining the noise in the environment.
The microphone detecting of the below in the mobile phone describes a more excellent embodiment as example.
Low frequency noise in the environment that built-in microphone detecting people ear by mobile phone can be heard, noise warning signal is passed to the Dolby circuit module, Dolby circuit is through after the real-time operation, produce sound signal identical with the source noise amplitude, single spin-echo, export this sound signal by earplug/earphone, cancel out each other with ambient noise, alleviate even eliminate the noise that people's ear can be heard, realize the noise reduction purpose.
The hardware (microphone, Dolby circuit etc.) that this preferred embodiment can utilize mobile phone to possess by increasing corresponding software module, and is combined with common earplug, makes common earplug possess the function of active noise reduction.
Preferably, can also control this function by software, the user opens when needed, can be simply to shield noise; Also can be used in and listen to the music, in the situation such as conversation, improve the definition that receives sound.
Notice that above-mentioned only is preferred embodiment of the present invention and institute's application technology principle.Skilled person in the art will appreciate that to the invention is not restricted to specific embodiment described here, can carry out for a person skilled in the art various obvious variations, readjust and substitute and can not break away from protection scope of the present invention.Therefore, although by above embodiment the present invention has been carried out comparatively detailed explanation, the present invention is not limited only to above embodiment, in the situation that does not break away from the present invention's design, can also comprise more other equivalent embodiment, and scope of the present invention is determined by appended claim scope.
Claims (16)
1. an earphone noise-reduction method is characterized in that, comprising:
Portable terminal obtains the noise in the environment;
Described portable terminal generation is identical with described noise amplitude, the signal of single spin-echo;
Described portable terminal is exported described signal when output audio by earphone.
2. method according to claim 1 is characterized in that, the described noise that described portable terminal obtains in the environment comprises:
Described portable terminal obtains low-frequency noise in the environment that people's ear can hear by microphone.
3. method according to claim 2 is characterized in that, described microphone comprise following one of at least: the microphone in the microphone in the described portable terminal, the described earphone.
4. method according to claim 1 is characterized in that, described portable terminal produces described signal and comprises:
Described portable terminal with described noise transfer to Dolby circuit;
Described Dolby circuit produces described signal through computing.
5. each described method in 4 according to claim 1 is characterized in that described portable terminal produces described signal and comprises:
Described portable terminal determines that the physical attribute of described noise surpasses threshold value;
Described portable terminal produces described signal.
6. method according to claim 5 is characterized in that, described physical attribute comprise following one of at least: amplitude, frequency.
7. each described method in 4 according to claim 1 is characterized in that, the described audio frequency of output comprise following one of at least: the music VF of described mobile terminal playing, the audio frequency of described mobile terminal call.
8. each described method in 4 according to claim 1 is characterized in that described portable terminal obtains described noise and comprises:
Described portable terminal determines whether the application that starts in the described portable terminal has been disposed startup and eliminated the noise function;
If judged result is yes, described portable terminal obtains described noise.
9. an earphone denoising device is characterized in that, is applied in the portable terminal, and described device comprises:
Obtain module, be used for obtaining the noise of environment;
Generation module is for generation of signal identical with described noise amplitude, single spin-echo;
Output module is used for when output audio described signal being exported by earphone.
10. device according to claim 9 is characterized in that, described acquisition module obtains low-frequency noise in the environment that people's ear can hear by microphone.
11. device according to claim 10 is characterized in that, described microphone comprise following one of at least: the microphone in the microphone in the described portable terminal, the described earphone.
12. device according to claim 9 is characterized in that, described generation module is Dolby circuit, and described Dolby circuit produces described signal through computing after receiving noise.
13. each described device in 12 according to claim 9 is characterized in that described generation module comprises:
Determining unit is used for determining that the physical attribute of described noise surpasses threshold value;
Generation unit is used for determining that at described determination module described physical attribute surpasses the described signal of generation in the situation of described threshold value.
14. device according to claim 13 is characterized in that, described physical attribute comprise following one of at least: amplitude, frequency.
15. each described device in 12 is characterized in that according to claim 9, the described audio frequency of output comprise following one of at least: the music VF of described mobile terminal playing, the audio frequency of described mobile terminal call.
16. each described device in 12 is characterized in that according to claim 9,
Described device also comprises: definite module that starts is used for determining whether the application that described portable terminal starts has disposed startup elimination noise function;
Described acquisition module is used for obtaining the noise in the environment after described definite startup module determines that elimination noise function has been disposed in described application.
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| CN2012105530467A CN103024631A (en) | 2012-12-18 | 2012-12-18 | Method and device of noise reduction of earphone |
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