CN101951422A - Mobile terminal noise processing method and mobile terminal - Google Patents
Mobile terminal noise processing method and mobile terminal Download PDFInfo
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Abstract
The embodiment of the invention discloses a mobile terminal noise processing method and a mobile terminal. The method comprises the following steps of: acquiring a call target voice signal and an environmental noise signal in the call process of the mobile terminal; acquiring a signal-noise parameter according to the call target voice signal and the environmental noise signal; comparing the signal-noise parameter with a preset parameter threshold value, and readjusting the de-noising function state according to the comparison result and the current de-noising function closing state, wherein the readjustment of the de-noising function state comprises starting the de-noising function when the current de-noising function is shut down, shutting down the de-noising function when the current de-noising function is started or keeping the current de-noising function state; and performing de-noising according to the readjusted de-noising function state. By adopting the embodiment of the invention, the method can realize adaptive starting and shutdown of the de-noising function and improve the call quality.
Description
Technical field
The present invention relates to field of mobile communication, relate in particular to a kind of portable terminal noise treatment method and portable terminal.
Background technology
Along with the continuous development of mobile communication with popularize, portable terminal (as, mobile phone) has been played the part of more and more important role in daily life.Simultaneously, the user of portable terminal has also had more and more higher pursuit to the function of portable terminal and the performance of each side.As, the tonequality the when user wishes to improve conversation; For this reason, a kind of mobile phone noise reduction technology occurs, can realize improving call tone quality.
But, the inventor finds in research process, existing denoising device/function all needs by artificially manually carrying out opening and closing, when the user in communication process when a very noisy environment is gone to quiet environment, if opened denoising device before the user, then this moment, this denoising device can't be closed automatically along with the variation of environmental noise, but was in opening always.Though, in noisy environment, open the effect that denoising device can play noise reduction, in quiet environment, open denoising device then can have certain influence to speech quality always.
Summary of the invention
Embodiment of the invention technical problem to be solved is, a kind of portable terminal noise treatment method and portable terminal are provided.Can self adaptation opening and closing decrease of noise functions.
In order to solve the problems of the technologies described above, the embodiment of the invention provides a kind of portable terminal noise treatment method, and this method comprises:
In described mobile terminal calling process, obtain conversation target voice signal and environmental noise signal;
Obtain the noise parameter according to described conversation target voice signal and environmental noise signal;
More described noise parameter and default parameter threshold, and readjust the decrease of noise functions state according to comparative result and current decrease of noise functions open and-shut mode, wherein, the described decrease of noise functions state that readjusts comprises and opens decrease of noise functions when current decrease of noise functions is closed, close decrease of noise functions or keep current decrease of noise functions state when current decrease of noise functions is opened;
Carry out noise reduction process according to the decrease of noise functions state after readjusting.
Further, described default parameter threshold comprises first threshold b, the second threshold value a and the 3rd threshold value c, wherein, the first threshold values b is used for determining whether to open decrease of noise functions when the conversation beginning, the second threshold values a is used for being become by peace and quiet in the communication process surrounding environment and determines whether to open decrease of noise functions when noisy, the 3rd threshold values c is used for when becoming peace and quiet, determining whether to close decrease of noise functions by noisy in the communication process surrounding environment.
Selectable, describedly obtain the noise parameter according to described conversation target voice signal and environmental noise signal and comprise:
Obtain the difference delta i of described conversation target voice signal Mi and environmental noise signal Ni, and described difference delta i taken absolute value obtain the noise parameter, promptly the noise parameter=| Δ i|=|Mi-Ni|, wherein i represents that signal is in i sampling instant sampling, i＞0.
Simultaneously, can be by a≤b≤c; Accordingly, described noise parameter and default parameter threshold, and readjust the decrease of noise functions state according to comparative result and current decrease of noise functions open and-shut mode and comprise:
Relatively | the size of Δ 1| and b, if | Δ 1|＜b, decrease of noise functions is in closed condition, then opens decrease of noise functions; If | Δ 1| 〉=b, decrease of noise functions is in opening, then closes decrease of noise functions, wherein, | the noise parameter when Δ 1| begins for conversation;
Relatively | the size of Δ n|, a and c, if decrease of noise functions is in closed condition, and | Δ n|＜a, then open decrease of noise functions, if decrease of noise functions is in opening, and | Δ n|＞c, then close decrease of noise functions, otherwise decrease of noise functions keeps original state, wherein, | Δ n| is the noise parameter of n sampling instant in the communication process, n＞1.
Wherein, described conversation target voice signal and the environmental noise signal of obtaining can comprise:
First microphone by described portable terminal obtains conversation target voice signal, and second microphone by described portable terminal obtains the environmental noise signal.
Accordingly, the embodiment of the invention also provides a kind of portable terminal, comprising:
Signal acquisition module is used at described mobile terminal calling process, obtains conversation target voice signal and environmental noise signal;
Parameter acquisition module is used for obtaining the noise parameter according to described conversation target voice signal and environmental noise signal;
The decrease of noise functions adjustment module, be used for more described noise parameter and default parameter threshold, and readjust the decrease of noise functions state according to comparative result and current decrease of noise functions open and-shut mode, wherein, the described decrease of noise functions state that readjusts comprises and opens decrease of noise functions when current decrease of noise functions is closed, close decrease of noise functions or keep current decrease of noise functions state when current decrease of noise functions is opened;
The noise reduction process module is used for carrying out noise reduction process according to the decrease of noise functions state after readjusting.
Wherein, described default parameter threshold comprises first threshold b, the second threshold value a and the 3rd threshold value c; The first threshold values b is used for determining whether to open decrease of noise functions when the conversation beginning, the second threshold values a is used for being become by peace and quiet in the communication process surrounding environment and determines whether to open decrease of noise functions when noisy, the 3rd threshold values c is used for when becoming peace and quiet, determining whether to close decrease of noise functions by noisy in the communication process surrounding environment.
Selectable, described parameter acquisition module also is used to obtain the difference delta i of described conversation target voice signal Mi and environmental noise signal Ni, and described difference delta i taken absolute value obtain the noise parameter, be the noise parameter=| Δ i|=|Mi-Ni|, wherein i represents that signal is in i sampling instant sampling, i＞0.
Further, a≤b≤c can be arranged; Then, corresponding, described decrease of noise functions adjustment module comprises:
The decrease of noise functions state detection unit is used for whether decrease of noise functions is in opening and detects;
First judges submodule, is used for comparison | the size of Δ 1| and b, if | Δ 1|＜b, decrease of noise functions is in closed condition, then opens decrease of noise functions; If | Δ 1| 〉=b, decrease of noise functions is in opening, then closes decrease of noise functions, wherein, | the noise parameter when Δ 1| begins for conversation;
Second judges submodule, be used for comparison | the size of Δ n|, a and c, if decrease of noise functions is in closed condition, and | Δ n|＜a, then open decrease of noise functions, if decrease of noise functions is in opening, and | Δ n|＞c, then close decrease of noise functions, otherwise decrease of noise functions keeps original state, wherein, | Δ n| is the noise parameter of n sampling instant in the communication process, n＞1.
Simultaneously, described portable terminal can comprise first microphone and second microphone;
Described signal acquisition module also is used for obtaining conversation target voice signal by described first microphone, obtains the environmental noise signal by described second microphone.
Implement the embodiment of the invention, have following beneficial effect:
In embodiments of the present invention by automatic detection conversation target voice signal with obtain the environmental noise signal and judge whether to adjust current decrease of noise functions state, by reasonably being set, threshold value just can realize, in communication process, if portable terminal moves in different noisy environments, its decrease of noise functions can carry out adaptive adjusting, and the speech quality in the different noisy environments is provided.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is an idiographic flow schematic diagram of the portable terminal noise treatment method in the embodiment of the invention;
Fig. 2 is the process schematic diagram that the noise parameter in the embodiment of the invention is adjusted the decrease of noise functions state when being the absolute value of difference;
Fig. 3 is a concrete schematic diagram of forming of the portable terminal in the embodiment of the invention;
Fig. 4 is a concrete schematic diagram of forming of the decrease of noise functions adjustment module among Fig. 3;
Fig. 5 is another concrete schematic diagram of forming of the portable terminal in the embodiment of the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
In the prior art, the denoising device/function of mobile phone be opened or be closed to portable terminal can not automatically according to the concrete condition of caller's environment of living in, and speech quality is impacted.And in specific embodiments of the invention, by caller's ambient conditions of living in (noisy or quiet) being judged the decrease of noise functions of adaptive On/Off portable terminal can realize promoting effectively in real time speech quality.
As shown in Figure 1, be an idiographic flow schematic diagram of the portable terminal noise treatment method in the embodiment of the invention, this flow process comprises:
101, in described mobile terminal calling process, obtain conversation target voice signal and environmental noise signal.As, in conversation when just having begun, or in conversation is carried out, real-time conversation target voice signal and the environmental noise signal of obtaining.These two signals can obtain respectively by two microphones that are in the portable terminal, and promptly first microphone by described portable terminal obtains conversation target voice signal, and second microphone by described portable terminal obtains the environmental noise signal.
Simultaneously, can be according to the characteristics of the signal that obtains, the suitable position that these two microphones are set.
102, obtain the noise parameter according to described conversation target voice signal and environmental noise signal.Wherein, this noise parameter can be the differential signal parameter, as, obtain the difference delta i of described conversation target voice signal Mi and environmental noise signal Ni, and described difference delta i taken absolute value obtain the noise parameter, be the noise parameter=| Δ i|=|Mi-Ni|, wherein i represents that signal is in i sampling instant sampling, i＞0.
Certainly, this noise parameter also can be the parameter of other reflected signal noise relations, as be signal level, noise level or the like, it is well known to those of ordinary skill in the art that correlation technique should be, do not do one by one herein and give unnecessary details, below only be described the method that compares judgement with threshold value, the situation of other parameters with the parameter of difference absolute value, should be well known to those of ordinary skill in the art, also do not specifically describe one by one herein.
103, more described noise parameter and default parameter threshold, and readjust the decrease of noise functions state according to comparative result and current decrease of noise functions open and-shut mode, wherein, the described decrease of noise functions state that readjusts comprises and opens decrease of noise functions when current decrease of noise functions is closed, close decrease of noise functions or keep current decrease of noise functions state when current decrease of noise functions is opened.
Wherein, Yu She parameter threshold can comprise first threshold b, the second threshold value a and the 3rd threshold value c; The first threshold values b is used for determining whether to open decrease of noise functions when the conversation beginning, the second threshold values a is used for being become by peace and quiet in the communication process surrounding environment and determines whether to open decrease of noise functions when noisy, the 3rd threshold values c is used for when becoming peace and quiet, determining whether to close decrease of noise functions by noisy in the communication process surrounding environment.
Below in conjunction with above-mentioned difference absolute value parameter | Δ i| describes how to carry out the judgement of threshold value.As, when setting threshold, can set a≤b≤c;
This this step can comprise:
Relatively | the size of Δ 1| and b, if | Δ 1|＜b, decrease of noise functions is in closed condition, then opens decrease of noise functions; If | Δ 1| 〉=b, decrease of noise functions is in opening, then closes decrease of noise functions, wherein, | the noise parameter when Δ 1| begins for conversation;
Relatively | the size of Δ n|, a and c, if decrease of noise functions is in closed condition, and | Δ n|＜a, then open decrease of noise functions, if decrease of noise functions is in opening, and | Δ n|＞c, then close decrease of noise functions, otherwise decrease of noise functions keeps original state, wherein, | Δ n| is the noise parameter of n sampling instant in the communication process, n＞1.
104, carry out noise reduction process according to the decrease of noise functions state after readjusting.That is,, then call voice is carried out corresponding decrease of noise functions and handle if the decrease of noise functions state is an open mode; If the decrease of noise functions state is a closed condition, then call voice is not carried out noise reduction process.Wherein, the concrete noise reduction process algorithm that is adopted in this step is not done one by one herein and is introduced, and this is well known to those of ordinary skill in the art.
For further setting forth the scheme in the embodiment of the invention, be example with Fig. 2, when description noise parameter is the absolute value of difference, how to adjust the process of decrease of noise functions state.
200, to preset the first threshold values b that determines whether to open decrease of noise functions when being used to converse beginning earlier, being used for the communication process surrounding environment is become when noisy by peace and quiet, determine whether to open the second threshold values a of decrease of noise functions, and be used for by the process surrounding environment by noisy when becoming peace and quiet, determine whether to close the threshold values c of decrease of noise functions, wherein, a≤b≤c.This process is not shown in the figures.
201, when the conversation beginning, obtain caller's target voice signal Mi and ambient noise signal Ni (i=1,2,3......) respectively in real time via first microphone and second microphone.
202, via the difference processing unit target voice signal Mi and noise signal Ni are made difference processing, obtain difference DELTA i=(Mi-Ni).
The absolute value of the difference that first sampling instant when 203, via first comparison judgment unit conversation being begun (t1 is constantly) described difference processing unit obtains | Δ 1| and the first threshold values b that presets compare,
If | Δ 1|＜b, then open decrease of noise functions,
If | Δ 1| 〉=b, then close decrease of noise functions;
204, (tn constantly to n sampling instant in the communication process via second comparison judgment unit, n＞1) absolute value of the difference obtained of described difference processing unit | Δ n| compares with the default second threshold values a and the 3rd threshold values c respectively, simultaneously, via the decrease of noise functions state detection unit whether decrease of noise functions being in opening detects
If decrease of noise functions is in closed condition, and | Δ n|＜a, then open decrease of noise functions,
If decrease of noise functions is in opening, and | Δ n|＞c, then close decrease of noise functions,
Otherwise decrease of noise functions keeps original state.
By foregoing description as can be known, in embodiments of the present invention, by automatic detection conversation target voice signal with obtain the environmental noise signal and judge whether to adjust current decrease of noise functions state, by reasonably being set, threshold value just can realize, in communication process, if portable terminal moves in different noisy environments, its decrease of noise functions can carry out adaptive adjusting, and the speech quality in the different noisy environments is provided.
On the other hand, the embodiment of the invention also provides the corresponding mobile terminal, and as shown in Figure 3, this portable terminal comprises:
Decrease of noise functions adjustment module 36, be used for more described noise parameter and default parameter threshold, and readjust the decrease of noise functions state according to comparative result and current decrease of noise functions open and-shut mode, wherein, the described decrease of noise functions state that readjusts comprises and opens decrease of noise functions when current decrease of noise functions is closed, close decrease of noise functions or keep current decrease of noise functions state when current decrease of noise functions is opened.Wherein, default parameter threshold comprises first threshold b, the second threshold value a and the 3rd threshold value c, the first threshold values b is used for determining whether to open decrease of noise functions when the conversation beginning, the second threshold values a is used for being become by peace and quiet in the communication process surrounding environment and determines whether to open decrease of noise functions when noisy, the 3rd threshold values c is used for when becoming peace and quiet, determining whether to close decrease of noise functions by noisy in the communication process surrounding environment.
Noise reduction process module 38 is used for carrying out noise reduction process according to the decrease of noise functions state after readjusting.
Wherein, difference according to the noise parameter, above-mentioned parameter acquisition module 34 also is used to obtain the difference delta i of described conversation target voice signal Mi and environmental noise signal Ni, and described difference delta i taken absolute value obtain the noise parameter, be the noise parameter=| Δ i|=|Mi-Ni|, wherein i represents that signal is in i sampling instant sampling, i＞0.
Simultaneously, three above-mentioned threshold values have following relation: a≤b≤c; And as shown in Figure 4, this decrease of noise functions adjustment module 36 can comprise:
Decrease of noise functions state detection unit 362 is used for whether decrease of noise functions is in opening and detects;
First judges submodule 364, is used for comparison | the size of Δ 1| and b, if | Δ 1|＜b, decrease of noise functions is in closed condition, then opens decrease of noise functions; If | Δ 1| 〉=b, decrease of noise functions is in opening, then closes decrease of noise functions, wherein, | the noise parameter when Δ 1| begins for conversation;
Second judges submodule 366, be used for comparison | Δ |, the size of a and c, if decrease of noise functions is in closed condition, and | Δ n|＜a, then open decrease of noise functions, if decrease of noise functions is in opening, and | Δ n|＞c, then close decrease of noise functions, otherwise decrease of noise functions keeps original state, wherein, | Δ n| is the noise parameter of n sampling instant in the communication process, n＞1.
As shown in Figure 5, the portable terminal in the embodiment of the invention can comprise first microphone 31 and second microphone 33; Signal acquisition module 32 also is used for obtaining conversation target voice signal by described first microphone, obtains the environmental noise signal by described second microphone.
By foregoing description as can be known, in embodiments of the present invention, by automatic detection conversation target voice signal with obtain the environmental noise signal and judge whether to adjust current decrease of noise functions state, by reasonably being set, threshold value just can realize, in communication process, if portable terminal moves in different noisy environments, its decrease of noise functions can carry out adaptive adjusting, and the speech quality in the different noisy environments is provided.
One of ordinary skill in the art will appreciate that all or part of flow process that realizes in the foregoing description method, be to instruct relevant hardware to finish by computer program, described program can be stored in the computer read/write memory medium, this program can comprise the flow process as the embodiment of above-mentioned each side method when carrying out.Wherein, described storage medium can be magnetic disc, CD, read-only storage memory body (Read-Only Memory, ROM) or at random store memory body (Random Access Memory, RAM) etc.
Above disclosed is a kind of preferred embodiment of the present invention only, can not limit the present invention's interest field certainly with this, and therefore the equivalent variations of doing according to claim of the present invention still belongs to the scope that the present invention is contained.
Claims (10)
1. portable terminal noise treatment method is characterized in that described method comprises:
In described mobile terminal calling process, obtain conversation target voice signal and environmental noise signal;
Obtain the noise parameter according to described conversation target voice signal and environmental noise signal;
More described noise parameter and default parameter threshold, and readjust the decrease of noise functions state according to comparative result and current decrease of noise functions open and-shut mode, wherein, the described decrease of noise functions state that readjusts comprises and opens decrease of noise functions when current decrease of noise functions is closed, close decrease of noise functions when current decrease of noise functions is opened, keep in the current decrease of noise functions state any;
Carry out noise reduction process according to the decrease of noise functions state after readjusting.
2. the method for claim 1 is characterized in that, described default parameter threshold comprises first threshold b, the second threshold value a and the 3rd threshold value c,
Wherein, the first threshold values b is used for determining whether to open decrease of noise functions when the conversation beginning, the second threshold values a is used for being become by peace and quiet in the communication process surrounding environment and determines whether to open decrease of noise functions when noisy, the 3rd threshold values c is used for when becoming peace and quiet, determining whether to close decrease of noise functions by noisy in the communication process surrounding environment.
3. method as claimed in claim 2 is characterized in that, describedly obtains the noise parameter according to described conversation target voice signal and environmental noise signal and comprises:
Obtain the difference delta i of described conversation target voice signal Mi and environmental noise signal Ni, and described difference delta i taken absolute value obtain the noise parameter, promptly the noise parameter=| Δ i|=|Mi-Ni|, wherein i represents that signal is in i sampling instant sampling, i＞0.
4. method as claimed in claim 3 is characterized in that, a≤b≤c;
Described noise parameter and default parameter threshold, and readjust the decrease of noise functions state according to comparative result and current decrease of noise functions open and-shut mode and comprise:
Relatively | the size of Δ 1| and b, if | Δ 1|＜b, decrease of noise functions is in closed condition, then opens decrease of noise functions; If | Δ 1| 〉=b, decrease of noise functions is in opening, then closes decrease of noise functions, wherein, | the noise parameter when Δ 1| begins for conversation;
Relatively | the size of Δ n|, a and c, if decrease of noise functions is in closed condition, and | Δ n|＜a, then open decrease of noise functions, if decrease of noise functions is in opening, and | Δ n|＞c, then close decrease of noise functions, otherwise decrease of noise functions keeps original state, wherein, | Δ n| is the noise parameter of n sampling instant in the communication process, n＞1.
5. as each described method in the claim 1 to 4, it is characterized in that described conversation target voice signal and the environmental noise signal of obtaining comprises:
First microphone by described portable terminal obtains conversation target voice signal, and second microphone by described portable terminal obtains the environmental noise signal.
6. a portable terminal is characterized in that, described portable terminal comprises:
Signal acquisition module is used at described mobile terminal calling process, obtains conversation target voice signal and environmental noise signal;
Parameter acquisition module is used for obtaining the noise parameter according to described conversation target voice signal and environmental noise signal;
The decrease of noise functions adjustment module, be used for more described noise parameter and default parameter threshold, and readjust the decrease of noise functions state according to comparative result and current decrease of noise functions open and-shut mode, wherein, the described decrease of noise functions state that readjusts comprises and opens decrease of noise functions when current decrease of noise functions is closed, close decrease of noise functions when current decrease of noise functions is opened, keep in the current decrease of noise functions state any;
The noise reduction process module is used for carrying out noise reduction process according to the decrease of noise functions state after readjusting.
7. portable terminal as claimed in claim 6 is characterized in that, described default parameter threshold comprises first threshold b, the second threshold value a and the 3rd threshold value c,
Wherein, the first threshold values b is used for determining whether to open decrease of noise functions when the conversation beginning, the second threshold values a is used for being become by peace and quiet in the communication process surrounding environment and determines whether to open decrease of noise functions when noisy, the 3rd threshold values c is used for when becoming peace and quiet, determining whether to close decrease of noise functions by noisy in the communication process surrounding environment.
8. portable terminal as claimed in claim 7, it is characterized in that, described parameter acquisition module also is used to obtain the difference delta i of described conversation target voice signal Mi and environmental noise signal Ni, and described difference delta i taken absolute value obtain the noise parameter, be the noise parameter=| Δ i|=|Mi-Ni|, wherein i represents that signal is in i sampling instant sampling, i＞0.
9. portable terminal as claimed in claim 8 is characterized in that, a≤b≤c;
Described decrease of noise functions adjustment module comprises:
The decrease of noise functions state detection unit is used for whether decrease of noise functions is in opening and detects;
First judges submodule, is used for comparison | the size of Δ 1| and b, if | Δ 1|＜b, decrease of noise functions is in closed condition, then opens decrease of noise functions; If | Δ 1| 〉=b, decrease of noise functions is in opening, then closes decrease of noise functions, wherein, | the noise parameter when Δ 1| begins for conversation;
Second judges submodule, be used for comparison | the size of Δ n|, a and c, if decrease of noise functions is in closed condition, and | Δ n|＜a, then open decrease of noise functions, if decrease of noise functions is in opening, and | Δ n|＞c, then close decrease of noise functions, otherwise decrease of noise functions keeps original state, wherein, | Δ n| is the noise parameter of n sampling instant in the communication process, n＞1.
10. as each described portable terminal in the claim 6 to 9, it is characterized in that,
Described portable terminal comprises first microphone and second microphone;
Described signal acquisition module also is used for obtaining conversation target voice signal by described first microphone, obtains the environmental noise signal by described second microphone.
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