CN103325378A - Terminal voice noise reducing method and terminal - Google Patents
Terminal voice noise reducing method and terminal Download PDFInfo
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- CN103325378A CN103325378A CN2013102988105A CN201310298810A CN103325378A CN 103325378 A CN103325378 A CN 103325378A CN 2013102988105 A CN2013102988105 A CN 2013102988105A CN 201310298810 A CN201310298810 A CN 201310298810A CN 103325378 A CN103325378 A CN 103325378A
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Abstract
The invention discloses a terminal voice noise reducing method and a terminal. The terminal comprises a first microphone and a second microphone. The terminal voice noise reducing method comprises the following steps of: judging whether the ambient environment is quiet or noisy by a sound pressure level or signal to noise ratio of the noise at the position in which the terminal is located, if a sound pressure level is lower than the preset sound pressure level threshold value or the signal to noise ratio is higher than a preset signal-to-noise ratio threshold value according to a detection result, judging the ambient environment of the terminal to be the quiet environment, and using the first microphone to carry out noise reduction treatment on voice. A condition that a sound sent by a user does not cause loss because of the noise reduction treatment is guaranteed, and a talking voice effect is improved.
Description
Technical field
The present invention relates to the voice signal technical field, in particular, relate to terminal voice de-noising method and terminal.
Background technology
Current, improve the mobile phone communication sound effect for the manufacture of the method for manufacturer's normal operation dual microphone noise reduction of portable terminal.The method of dual microphone noise reduction is specially, at call terminal two microphones are set, one of them microphone is used for catching the voice of conversation and the noise of external environment condition, another microphone is specifically designed to the noise that catches external environment condition, then eliminate the noise of external environment condition by the noise elimination algorithm, can suppress the unstable state noise like this, obtain best communication effect.
In the research and practice process to prior art, the present inventor finds that there is following problem in prior art:
Less or do not have the situation of noise for the external environment condition noise, prior art just can't be improved communication effect, sometimes even can affect speech quality.Externally in the very quiet situation of environment, because external noise is very little, even can ignore, have the noise that certain probability is used as the normal call voice of user external environment condition so be specifically designed to the microphone that catches the external environment condition noise, and eliminate user's call voice by the noise elimination algorithm, thereby because maloperation and so that the communication effect variation.
Therefore, how to improve the effect of call voice, become the problem that needs most at present solution.
Summary of the invention
In view of this, purpose of design of the present invention is, a kind of terminal voice de-noising method and terminal are provided, to improve the effect of call voice.
The embodiment of the invention is achieved in that
A kind of terminal voice de-noising method, described terminal comprises the first microphone and second microphone, and described method comprises:
Judge by described second microphone whether the sound pressure level of the noise of described terminal present position is lower than default sound pressure level threshold value, or
Whether the signal to noise ratio (S/N ratio) of judging described noise by described second microphone is higher than default snr threshold;
If judged result is yes, then by described the first microphone voice are carried out noise reduction process.
Preferably, if described judged result is yes, then by the first microphone voice are carried out the step of noise reduction process, be specially: if judged result is yes, then by the first microphone voice are carried out noise reduction process, and the sound pressure level of described voice is turned down to default sound pressure level.
Preferably, if the determination result is NO, then by described the first microphone and described second microphone described voice are carried out noise reduction process.
Preferably, if described the determination result is NO, then by described the first microphone and described second microphone described voice are carried out the step of noise reduction process, are specially:
If the determination result is NO, then by described the first microphone and described second microphone described voice are carried out noise reduction process, and the sound pressure level of described voice is heightened to default sound pressure level.
Preferably, described method also comprises:
Described the first microphone gathers described noise and described voice;
Described second microphone gathers described noise.
A kind of terminal, described terminal comprises the first microphone and second microphone, and described terminal also comprises:
Judge module is used for judging by described second microphone whether the sound pressure level of described terminal present position noise is lower than default sound pressure level threshold value, or judges by described second microphone whether the signal to noise ratio (S/N ratio) of described noise is higher than default snr threshold;
The first noise reduction module is used in the judged result of described judge module then by described the first microphone voice being carried out noise reduction process when being.
Preferably, described the first noise reduction module specifically is used for, and, then by described the first microphone voice is carried out noise reduction process, and the sound pressure level of described voice is turned down to default sound pressure level when being in the judged result of described judge module.
Preferably, described terminal also comprises: the second noise reduction module is used for when the determination result is NO, then by described the first microphone and described second microphone described voice being carried out noise reduction process at described judge module.
Preferably, described the second noise reduction module specifically is used for,, then by described the first microphone and described second microphone described voice are carried out noise reduction process, and the sound pressure level of described voice is heightened to default sound pressure level when the determination result is NO at described judge module.
Preferably, described the first microphone is used for gathering described noise and described voice; Described second microphone is used for gathering described noise.
Compared with prior art, the technical scheme that provides of the present embodiment has the following advantages and characteristics:
In scheme provided by the invention, around the sound pressure level of terminal present position noise or noise are recently judged, be quiet environment or noisy environment, if determine that according to testing result sound pressure level is lower than default sound pressure level threshold value or signal to noise ratio (S/N ratio) is higher than default snr threshold, then the terminal surrounding environment is judged as quiet environment, use so the first microphone that voice are carried out noise reduction process, thereby can guarantee that the sound that the user sends can not cause damage because of noise reduction process, so improved the effect of call voice.
Description of drawings
In order to be illustrated more clearly in the present invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the process flow diagram of a kind of terminal voice de-noising method provided by the present invention;
Fig. 2 is the module map of a kind of terminal provided by the present 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 obtains under the creative work prerequisite.
The embodiment of the invention provides a kind of terminal voice de-noising method and terminal, to improve the call voice effect of call terminal.
Because there are various ways in the control method of above-mentioned voice and the specific implementation of terminal, are elaborated below by specific embodiment:
Embodiment one
See also shown in Figure 1ly, shown in Figure 1 is a kind of terminal voice de-noising method, and this terminal comprises the first microphone and second microphone, and the method comprises:
S11, judge by second microphone whether the sound pressure level of the noise of terminal present position is lower than default sound pressure level threshold value, or judge by second microphone whether the signal to noise ratio (S/N ratio) of the noise of terminal present position is higher than default snr threshold;
Wherein, the first microphone is main microphone, is used for gathering voice and environmental noise; Second microphone is secondary microphone, is used for gathering environmental noise.Sound pressure level is the loudness of sound, and its unit is decibel, and decibel is a kind of unit of account of weighing the loudness of sound.The ratio of noise signal when signal to noise ratio (S/N ratio) is normal sound signal and no signal.
Judge that by second microphone the step whether sound pressure level of terminal present position noise is lower than default sound pressure level threshold value is specially: set in advance a sound pressure level threshold value, judge by second microphone whether the sound pressure level of terminal present position noise is lower than default sound pressure level threshold value again.According to judged result, the environment that is lower than this default sound pressure level threshold value then belongs to quiet environment, and noise is smaller and more stable in this environment, and is less on accuracy and the sharpness impact of conversation.According to judged result, the environment that is higher than this default sound pressure level threshold value then belongs to noisy environment, and noise is larger and show unstable state in noisy environment, affects larger on accuracy and the sharpness of conversation.Default sound pressure level threshold value can be the predefined value of user.
Judge that by second microphone the step whether signal to noise ratio (S/N ratio) of terminal present position noise is higher than default snr threshold is specially: set in advance a snr threshold, judge by second microphone whether the signal to noise ratio (S/N ratio) of terminal present position noise is higher than default snr threshold again.According to judged result, the environment that is higher than this default snr threshold then belongs to quiet environment, and noise is smaller and more stable in this environment, and is less on accuracy and the sharpness impact of conversation.According to judged result, the environment that is lower than this default snr threshold then belongs to noisy environment, and noise is larger and show unstable state in noisy environment, affects larger on accuracy and the sharpness of conversation.Default snr threshold can be the predefined value of user.
If the S12 judged result is yes, then by the first microphone voice are carried out noise reduction process.
Wherein, when being, illustrate then that the noise of surrounding environment of terminal is less in judged result, the type of this environment belongs to quiet environment, and terminal can be only be carried out noise reduction process by the first microphone that is used for gathering voice and environmental noise to voice in this case.
In the embodiment shown in fig. 1, this programme is that the way of employing is the noise by second microphone acquisition terminal present position, collection result according to second microphone is judged, when judged result is that the signal to noise ratio (S/N ratio) that the sound pressure level of the noise of terminal present position is lower than the noise of default sound pressure level threshold value or terminal present position is higher than default snr threshold, then the terminal surrounding environment belongs to quiet environment, terminal can only use the first microphone that voice are carried out noise reduction process, thereby can guarantee that the sound that the user sends can not cause damage because of noise reduction process, so improved the effect of call voice.
In the embodiment shown in fig. 1, S12 can be specially: if judged result is yes, then by the first microphone voice are carried out noise reduction process, and the sound pressure level of these voice is turned down to default sound pressure level.This is because when determining that according to judged result the surrounding environment of terminal belongs to quiet environment, the user can clearly hear the sound that terminal is sent in this case, in order to guarantee user's comfort level, the sound pressure level of voice can be turned down the predefined sound pressure level of user, namely reduce volume, thereby guarantee user's call voice effect, avoid that sound is excessive to bring uncomfortable sensation to the user.
If the determination result is NO for S13, then by the first microphone and second microphone voice are carried out noise reduction process.
Wherein, when the determination result is NO, illustrate that then the noise of surrounding environment of terminal is larger, surrounding environment belongs to noisy environment, so adopt at least two microphones that voice are carried out noise reduction process.
In the embodiment shown in fig. 1, S13 can be specially: if the determination result is NO, then by the first microphone and second microphone voice are carried out noise reduction process, and the sound pressure level of voice is heightened to default sound pressure level.This is because after determining that according to judged result the surrounding environment of terminal is noisy environment, the user probably can't clearly hear the sound that the receiver of terminal sends under this environment, need to adopt at least two microphones that voice are carried out noise reduction process, and and the sound pressure level of voice heightened to default sound pressure level, namely tune up volume, thereby can better guarantee user's call voice effect, avoid that sound is excessive to bring uncomfortable sensation to the user.
Embodiment two
As shown in Figure 2, Fig. 2 is a kind of terminal that the present invention proposes, this terminal comprises the first microphone 11 and second microphone 12, this terminal also comprises: judge module 13, be used for judging by second microphone 12 whether the sound pressure level of terminal present position noise is lower than default sound pressure level threshold value, or judge by second microphone 12 whether the signal to noise ratio (S/N ratio) of terminal present position noise is higher than default snr threshold; The first noise reduction module 14 is used in the judged result of judge module then carrying out noise reduction process by 11 pairs of voice of the first microphone when being.
Wherein, the first microphone 11 is main microphone, is used for gathering voice and environmental noise; Second microphone 12 is secondary microphone, is used for gathering environmental noise.Sound pressure level is the loudness of sound, and its unit is decibel, and decibel is a kind of unit of account of weighing the loudness of sound.The ratio of noise signal when signal to noise ratio (S/N ratio) is normal sound signal and no signal.
Wherein, judge module 13 judges that by second microphone 12 the process whether sound pressure level of terminal present position noise is lower than default sound pressure level threshold value is specially: set in advance a sound pressure level threshold value in the judge module 13, judge module 13 judges according to the collection result of 12 pairs of noises of second microphone whether the sound pressure level of terminal present position noise is lower than default sound pressure level threshold value.According to judged result, the environment that is lower than this default sound pressure level threshold value then belongs to quiet environment, and noise is smaller and more stable in this environment, and is less on accuracy and the sharpness impact of conversation.According to judged result, the environment that is higher than this default sound pressure level threshold value then belongs to noisy environment, and noise is larger and show unstable state in noisy environment, affects larger on accuracy and the sharpness of conversation.Default sound pressure level threshold value can be the predefined value of user.
Wherein, what judge module 13 was judged by second microphone 12 is that the process whether signal to noise ratio (S/N ratio) of terminal present position noise is higher than default snr threshold is specially: set in advance a snr threshold in the judge module 13, judge module 13 judges according to the collection result of 12 pairs of noises of second microphone whether the signal to noise ratio (S/N ratio) of terminal present position noise is higher than default snr threshold.According to judged result, the environment that is higher than this default snr threshold then belongs to quiet environment, and noise is smaller and more stable in this environment, and is less on accuracy and the sharpness impact of conversation.According to judged result, the environment that is lower than this default snr threshold then is judged as noisy environment, and noise is larger and show unstable state in noisy environment, affects larger on accuracy and the sharpness of conversation.Default snr threshold can predefinedly be worth for the user.
In the embodiment shown in Figure 2, this programme is that the way that adopts is the noise of the terminal present position that collects by second microphone 12, judge module 13 is according to the collection result of second microphone 12, the judged result that obtains is that the signal to noise ratio (S/N ratio) that the sound pressure level of the noise of terminal present position is lower than the noise of default sound pressure level threshold value or terminal present position is higher than default snr threshold, when determining that namely the terminal surrounding environment belongs to quiet environment, carry out noise reduction process by the first noise reduction module 14 by 11 pairs of voice of the first microphone, thereby can guarantee that the sound that the user sends can not cause damage because of noise reduction process, so improved the effect of call voice.
In the embodiment shown in Figure 2, the first noise reduction module 14 specifically can be used for, and, then carries out noise reduction process by 11 pairs of voice of the first microphone, and the sound pressure level of these voice is turned down to default sound pressure level when being in the judged result of judge module 13.This is because when the surrounding environment of determining terminal is quiet environment, the user can clearly hear the sound that terminal is sent, in order to guarantee user's comfort level, the sound pressure level of voice can be turned down to default sound pressure level, thereby can better guarantee user's call voice effect, avoid that sound is excessive to bring uncomfortable sensation to the user.
In the embodiment shown in Figure 2, can also comprise that the second noise reduction module 15, the second noise reduction module 15 specifically are used for, at judge module when the determination result is NO, then by the first microphone and second microphone voice are carried out noise reduction process, and the sound pressure level of voice is heightened to default sound pressure level.This is because be noisy environment in the surrounding environment of determining terminal, the user probably can't clearly hear the sound that the receiver of terminal sends, need to adopt at least two microphones that voice are carried out noise reduction process, in order to guarantee user's comfort level, the sound pressure level of voice can be heightened to default sound pressure level, namely tune up volume, thereby guarantee user's call voice effect, avoid that sound is excessive to bring uncomfortable sensation to the user.
Need to prove, Fig. 1 is the preferred embodiment that the present invention introduces to embodiment shown in Figure 2, and those skilled in the art can design more embodiment on this basis fully, does not therefore give unnecessary details herein.
Multiple modification to these embodiment will be apparent concerning those skilled in the art, and General Principle as defined herein can be in the situation that do not break away from the spirit or scope of the present invention, in other embodiments realization.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. terminal voice de-noising method, described terminal comprises the first microphone and second microphone, it is characterized in that, and described method comprises:
Judge by described second microphone whether the sound pressure level of the noise of described terminal present position is lower than default sound pressure level threshold value, or
Whether the signal to noise ratio (S/N ratio) of judging described noise by described second microphone is higher than default snr threshold;
If judged result is yes, then by described the first microphone voice are carried out noise reduction process.
2. method according to claim 1 is characterized in that, if described judged result is yes, then by described the first microphone voice is carried out the step of noise reduction process, is specially:
If judged result is yes, then by described the first microphone voice is carried out noise reduction process, and the sound pressure level of described voice is turned down to default sound pressure level.
3. method according to claim 1 is characterized in that, described method also comprises: if the determination result is NO, then by described the first microphone and described second microphone described voice are carried out noise reduction process.
4. method according to claim 3 is characterized in that, if described the determination result is NO, then by described the first microphone and described second microphone described voice is carried out the step of noise reduction process, is specially:
If the determination result is NO, then by described the first microphone and described second microphone described voice are carried out noise reduction process, and the sound pressure level of described voice is heightened to default sound pressure level.
5. the described method of any one in 4 according to claim 1 is characterized in that, described method also comprises:
Described the first microphone gathers described noise and described voice;
Described second microphone gathers described noise.
6. terminal, described terminal comprises the first microphone and second microphone, it is characterized in that, and described terminal also comprises:
Judge module is used for judging by described second microphone whether the sound pressure level of the noise of described terminal present position is lower than default sound pressure level threshold value, or judges by described second microphone whether the signal to noise ratio (S/N ratio) of described noise is higher than default snr threshold;
The first noise reduction module is used in the judged result of described judge module then by described the first microphone voice being carried out noise reduction process when being.
7. terminal according to claim 6, it is characterized in that, described the first noise reduction module specifically is used for, in the judged result of described judge module when being, then by described the first microphone voice are carried out noise reduction process, and the sound pressure level of described voice is turned down to default sound pressure level.
8. terminal according to claim 6 is characterized in that, described terminal also comprises:
The second noise reduction module is used for when the determination result is NO, then by described the first microphone and described second microphone described voice being carried out noise reduction process at described judge module.
9. terminal according to claim 8, it is characterized in that, described the second noise reduction module specifically is used for, at described judge module when the determination result is NO, then by described the first microphone and described second microphone described voice are carried out noise reduction process, and the sound pressure level of described voice is heightened to default sound pressure level.
10. according to claim 6 to the described terminal of 9 any one, it is characterized in that,
Described the first microphone is used for gathering described noise and described voice;
Described second microphone is used for gathering described noise.
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| CN110782884A (en) * | 2019-10-28 | 2020-02-11 | 歌尔股份有限公司 | Far-field pickup noise processing method, device, equipment and storage medium |
| CN111128113A (en) * | 2019-12-31 | 2020-05-08 | 上海工程技术大学 | Active noise reduction method and system for passenger plane cabin of civil aviation |
| CN111933167A (en) * | 2020-08-07 | 2020-11-13 | Oppo广东移动通信有限公司 | Noise reduction method and device for electronic equipment, storage medium and electronic equipment |
| WO2022028083A1 (en) * | 2020-08-07 | 2022-02-10 | Oppo广东移动通信有限公司 | Noise reduction method and apparatus for electronic device, storage medium and electronic device |
| CN111933167B (en) * | 2020-08-07 | 2024-03-12 | Oppo广东移动通信有限公司 | Noise reduction method and device of electronic equipment, storage medium and electronic equipment |
| CN113891207A (en) * | 2021-09-24 | 2022-01-04 | 深圳艾创力科技有限公司 | ANC noise reduction method and system for neck-wearing voice interaction earphone |
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