CN103680510A - Method and device for noise reduction - Google Patents
Method and device for noise reduction Download PDFInfo
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- CN103680510A CN103680510A CN201210334092.8A CN201210334092A CN103680510A CN 103680510 A CN103680510 A CN 103680510A CN 201210334092 A CN201210334092 A CN 201210334092A CN 103680510 A CN103680510 A CN 103680510A
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Abstract
The embodiment of the invention discloses a method and a device for noise reduction. The method comprises the following steps: obtaining operating instructions of a volume key when a terminal outputs voice signals; enabling the function of noise reduction when the operating instructions of the volume key, meeting a preset condition, are obtained; using the function of noise reduction to conduct adaptive noise reduction on the voice signals. The embodiment of the invention does not need a dedicated key, and avoids tedious user operation. The function of noise reduction can be conveniently enabled by controlling the volume key by a user. In addition, because the embodiment of the invention uses a method for adaptive noise reduction instead of fixed efforts to reduce noise, the noise reduction on the voice signals can be conducted according to the amplitude of environmental noise. Especially in a quiet environment, the comfort level of human ears can be improved through the adaptive noise reduction, and therefore, the user experience is enhanced.
Description
Technical field
The present invention relates to signal processing technology field, relate in particular to denoise processing method and device.
Background technology
For example, when terminal (mobile phone) is exported voice signal in more noisy environment, user's audibility can be poor, in order to improve user's audibility, can first for environmental noise, to voice signal, carry out noise reduction process, and then by the voice signal after terminal output noise reduction process.
Due in quiet environment, without voice signal is carried out to noise reduction process, therefore in prior art, conventionally the noise reduction process function that sets in advance terminal is closed, and when needs carry out noise reduction process to voice signal, then opens the noise reduction process function of terminal, wherein, conventionally take following two kinds of modes to open the noise reduction process function of terminal: switch is set in terminal, and user stirs this switch, realizes the unlatching of noise reduction process function; Or, manually select the interior noise reduction process function choosing-item arranging of terminal, realize the unlatching of noise reduction process function.Taking above-mentioned any one mode to open after the noise reduction process function of terminal, terminal is carried out noise reduction process according to fixing noise reduction dynamics to voice signal.
Therefore, in prior art, when opening the noise reduction process function of terminal, special button need to be set, or manually carry out loaded down with trivial details operation, cause user in communication process, to open noise reduction process feature operation inconvenience; And after opening the noise reduction process function of terminal, owing to adopting fixing noise reduction dynamics, carry out noise reduction process, therefore when user holds terminal and enters quiet environment, terminal still can be carried out noise reduction process to voice signal, thereby allow people's ear produce the sensation of negative pressure or similar tinnitus, reduced user's experience.
Summary of the invention
Denoise processing method and device are provided in the embodiment of the present invention, in order to solve, in prior art, in terminal, open the inconvenience of noise reduction process function, and user have experienced not high problem.
For addressing the above problem, the embodiment of the present invention provides following technical scheme:
On the one hand, provide a kind of denoise processing method, the method comprises:
When terminal output voice signal, the button operation instruction of obtaining volume key;
When getting while meeting pre-conditioned button operation instruction, open noise reduction process function;
By described noise reduction process function, described voice signal is carried out to adaptive noise reduction processing.
In conjunction with on the one hand, in the possible implementation of the first, described in obtain volume key button operation instruction, comprising: obtain the button operation instruction that volume increases key; Described getting meets pre-conditioned button operation instruction, comprising: when described terminal reaches max volume grade, get the button operation instruction that volume increases key; Or when described terminal reaches max volume grade, the button time that gets volume increase key reaches the button operation instruction of Preset Time value.
In conjunction with on the one hand, or the possible implementation of the first, in the possible implementation of the second, describedly by described noise reduction process function, described voice signal is carried out to adaptive noise reduction processing, comprising: obtain environmental noise signal; According to described environmental noise signal, determine noise reduction dynamics; According to definite noise reduction dynamics, carry out adaptive noise reduction processing.
In conjunction with the possible implementation of the second, in the third possible implementation, describedly according to described environmental noise signal, determine noise reduction dynamics, comprising: judge that whether the average of described environmental noise signal is higher than predetermined threshold value; When higher than described predetermined threshold value, determine that noise reduction dynamics is the first noise reduction dynamics, when lower than described predetermined threshold value, determine that noise reduction dynamics is for the second noise reduction dynamics lower than described the first noise reduction dynamics.
In conjunction with the possible implementation of the second, or the third possible implementation, in the 4th kind of possible implementation, describedly according to definite noise reduction dynamics, carry out adaptive noise reduction processing, comprise: according to described environmental noise signal and described noise reduction dynamics, produce the anti-phase offseting signal of described environmental noise signal; By after described voice signal and described anti-phase offseting signal stack, the voice signal obtaining after output noise reduction process.
On the other hand, provide a kind of noise reduction process device, having comprised:
Acquiring unit, for when terminal is exported voice signal, the button operation instruction of obtaining volume key;
Open unit, while meeting pre-conditioned button operation instruction for getting when described acquiring unit, open noise reduction process function;
Processing unit, carries out adaptive noise reduction processing for the noise reduction process function of opening by described unlatching unit to described voice signal.
In conjunction with on the other hand, in the possible implementation of the first, described acquiring unit, the button operation instruction that increases key specifically for obtaining volume; Described unlatching unit, specifically for when described acquiring unit is when described terminal reaches max volume grade, while getting the button operation instruction of volume increase key, opens noise reduction process function; Or described unlatching unit, specifically for when described acquiring unit is when described terminal reaches max volume grade, gets button time that volume increases key while reaching the button operation instruction of Preset Time value, opens noise reduction process function.
In conjunction with on the other hand, or the possible implementation of the first, in the possible implementation of the second, described processing unit comprises: obtain subelement, for obtaining environmental noise signal; Determine subelement, for obtaining the environmental noise signal that subelement obtains described in basis, determine noise reduction dynamics; Process subelement, for carrying out adaptive noise reduction processing according to the definite noise reduction dynamics of described definite subelement.
In conjunction with the possible implementation of the second, in the third possible implementation, described definite subelement, specifically for the average of obtaining the environmental noise signal that subelement obtains described in judging whether higher than predetermined threshold value, when higher than described predetermined threshold value, determine that noise reduction dynamics is the first noise reduction dynamics, when lower than described predetermined threshold value, determine that noise reduction dynamics is for the second noise reduction dynamics lower than described the first noise reduction dynamics.
In conjunction with the possible implementation of the second, or the third possible implementation, in the 4th kind of possible implementation, described processing subelement, environmental noise signal and the determined noise reduction dynamics of described definite subelement specifically for obtaining subelement described in basis, obtained, produce the anti-phase offseting signal of described environmental noise signal, by after described voice signal and described anti-phase offseting signal stack, the voice signal obtaining after output noise reduction process.
Therefore, in the denoise processing method of the embodiment of the present invention, when terminal output voice signal, by obtaining the button operation instruction of volume key, thereby getting while meeting pre-conditioned button operation instruction, opening noise reduction process function, voice signal is being carried out to adaptive noise reduction processing.Because user is in noisy environment, can be subconscious by volume key to heighten volume, therefore the embodiment of the present invention, without special button is set, is also carried out loaded down with trivial details operation without user, by user, to the control of volume key, just can open easily noise reduction process function; In addition, owing to having adopted self-adapting denoising processing method in the embodiment of the present invention, rather than adopt fixing noise reduction dynamics to carry out noise reduction process, therefore can to voice signal, carry out noise reduction process according to the size of environmental noise, especially under quiet environment, can process to strengthen by adaptive noise reduction the comfort level of people's ear, thereby improve user, experience.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the denoise processing method schematic flow sheet in one embodiment of the invention;
Fig. 2 is the denoise processing method schematic flow sheet in another embodiment of the present invention;
Fig. 3 is the denoise processing method schematic flow sheet in another embodiment of the present invention;
Fig. 4 is the noise reduction process apparatus structure schematic diagram in one embodiment of the invention;
Fig. 5 is the structural representation of processing unit in one embodiment of the invention;
Fig. 6 is the embodiment of a terminal of application noise reduction process embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out to clear, complete description, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
As shown in Figure 1, be an embodiment of denoise processing method of the present invention, its concrete processing procedure is as follows:
Step 101, when terminal output voice signal, the button operation instruction of obtaining volume key.
Wherein, above-mentioned terminal can be mobile phone, can be also any voice signal output device with volume increase key, for example, and earphone, notebook computer etc.
User is in passing through the process of terminals listen voice signal; when environmental noise is excessive so that affect audibility; conventionally can tune up volume by the volume key in terminal; therefore the embodiment of the present invention can, by obtaining the button operation instruction of the volume key of terminal, be known the noise reduction process demand of user to voice signal.
Volume key in terminal comprises that volume increases key and volume reduces key (can use respectively " vol+ " and " vol-" to represent), while obtaining the button operation instruction of volume key, can only obtain the button operation instruction that volume increases key, the follow-up button operation instruction according to volume increase key judges whether to open noise reduction process function.
Step 102, when getting while meeting pre-conditioned button operation instruction, opens noise reduction process function.
Owing to not reaching max volume grade in terminal, the volume increase key that user presses in terminal may be only used to tune up volume, rather than need to carry out noise reduction process, therefore, in the embodiment of the present invention, get and meet pre-conditioned button operation instruction and can comprise following two kinds of situations: when terminal reaches max volume grade, get the button operation instruction that volume increases key; Or, when terminal reaches max volume grade, the button time that gets volume increase key reaches the button operation instruction of Preset Time value, to prevent when terminal reaches max volume grade, because of user's maloperation, open noise reduction process function, for example, above-mentioned Preset Time value can be set to 2 seconds, and this embodiment of the present invention is not limited.
Step 103, carries out adaptive noise reduction processing by noise reduction process function to voice signal.
Wherein, carry out when adaptive noise reduction is processed comprising following processing procedure: first obtain environmental noise signal, then according to environmental noise signal, determine noise reduction dynamics, then carry out adaptive noise reduction processing according to definite noise reduction dynamics.
In the embodiment of the present invention, when determining noise reduction dynamics according to environmental noise signal, can first judge that whether the average of environmental noise signal is higher than predetermined threshold value, when higher than predetermined threshold value, determine that noise reduction dynamics is the first noise reduction dynamics, when lower than predetermined threshold value, determine that noise reduction dynamics is for the second noise reduction dynamics lower than the first noise reduction dynamics.
Above-mentioned the first noise reduction dynamics can be set to normal noise reduction dynamics, for example, can be set to 1, corresponding the second noise reduction dynamics is set to the numerical value lower than the first noise reduction dynamics, for example, can be set to 0.5 or 0, when being set to 0, be equivalent to close noise reduction process function.
After definite noise reduction dynamics, can be first according to environmental noise signal and noise reduction dynamics, produce the anti-phase offseting signal of environmental noise signal, for example, can the anti-phase offseting signal of noise reduction dynamics as environmental noise signal will be multiplied by after environmental noise signal inversion, then using the voice signal obtaining after voice signal and the stack of anti-phase offseting signal after noise reduction process.
Therefore, in the denoise processing method of the embodiment of the present invention, because user is in noisy environment, can be subconscious by volume key to heighten volume, therefore the embodiment of the present invention is without special button is set, also without user, carry out loaded down with trivial details operation, by user, to the control of volume key, just can open easily noise reduction process function; In addition, owing to having adopted self-adapting denoising processing method in the embodiment of the present invention, rather than adopt fixing noise reduction dynamics to carry out noise reduction process, therefore can to voice signal, carry out noise reduction process according to the size of environmental noise, especially under quiet environment, can process to strengthen by adaptive noise reduction the comfort level of people's ear, thereby improve user, experience.
As shown in Figure 2, be another embodiment of denoise processing method of the present invention, this embodiment shows in detail the process of carrying out adaptive noise reduction processing:
When terminal does not reach max volume grade, the volume getting each time increases the button operation instruction of key for the volume of terminal being heightened to a grade.
When terminal reaches max volume grade, in order to prevent user, because volume is pressed in maloperation, increase key, cause opening noise reduction process function, in the present embodiment, arrange when the button time of volume increase key reaches Preset Time value, just open this noise reduction process function, to prevent maloperation.In the present embodiment, for example, above-mentioned Preset Time value can be set to 2 seconds, and this embodiment of the present invention is not limited.
In the present embodiment, can only obtain the environmental noise signal in Preset Time section, follow-uply according to the environmental noise signal in this Preset Time section, voice signal be carried out to adaptive noise reduction processing; Or, periodically obtaining environmental noise signal, the environmental noise signal in each cycle that follow-up basis is obtained carries out adaptive noise reduction processing to the voice signal in the corresponding time period.
Wherein, while determining noise reduction dynamics, can judge that whether the average of environmental noise signal is higher than predetermined threshold value, when higher than predetermined threshold value, determine that noise reduction dynamics is the first noise reduction dynamics, when lower than predetermined threshold value, determine that noise reduction dynamics is for the second noise reduction dynamics lower than the first noise reduction dynamics.
According to the difference of obtaining environmental noise aspect in step 203, determine that noise reduction dynamics can take following two kinds of modes:
First kind of way, if only obtain the environmental noise signal in Preset Time section in step 203, while determining noise reduction dynamics, can first calculate the average of environmental noise signal in this Preset Time section, whether the average of the environmental noise signal that then judgement calculates is higher than predetermined threshold value, when higher than default thresholding, determine that noise reduction dynamics is the first noise reduction dynamics, when lower than default thresholding, determine that noise reduction dynamics is for lower than the second noise reduction dynamics of the first noise reduction dynamics, follow-uply according to this noise reduction dynamics, voice signal is carried out to adaptive noise reduction processing.
The second way, if periodically obtain environmental noise signal in step 203, while determining noise reduction dynamics, can calculate respectively the average of environmental noise signal within each cycle, then for each average calculating, judge that whether this average is higher than predetermined threshold value, when higher than default thresholding, determine that noise reduction dynamics is the first noise reduction dynamics, when lower than default thresholding, determine that noise reduction dynamics is for lower than the second noise reduction dynamics of the first noise reduction dynamics, follow-uply according to this noise reduction dynamics, the voice signal in the corresponding time period is carried out to adaptive noise reduction processing.
When terminal output voice signal chronic, in the process of terminal output voice signal, environmental noise signal may change a lot, therefore, while adopting the above-mentioned second way to determine noise reduction dynamics, follow-uply according to the noise reduction dynamics in each cycle, speech signal segments is carried out to adaptive noise reduction and process and can reach better effect.
Above-mentioned the first noise reduction dynamics can be set to normal noise reduction dynamics, for example, can be set to 1, corresponding the second noise reduction dynamics is set to the numerical value lower than the first noise reduction dynamics, for example, can be set to 0.5 or 0, when being set to 0, be equivalent to close noise reduction process function.It should be noted that, above-mentioned is only a kind of example that arranges of noise reduction dynamics value, in practical application, can segment noise reduction dynamics, for example, three above noise reduction dynamics are set, and this embodiment of the present invention is not limited.
In the embodiment of the present invention, according to definite noise reduction dynamics, voice signal is carried out to adaptive noise reduction processing, can comprise step 205 and step 206.
In the present embodiment, anti-phase offseting signal can be determined by following formula:
Anti-phase offseting signal=environmental noise signal * noise reduction dynamics
In addition, in the embodiment of the present invention, after opening noise reduction process function, can also obtain volume and reduce key operational order, when getting, meet when continuing button and reaching the button operation instruction of Preset Time value, can close noise reduction process function.
Therefore, in the denoise processing method of the embodiment of the present invention, because user is in noisy environment, can be subconscious by volume key to heighten volume, therefore the embodiment of the present invention is without special button is set, also without user, carry out loaded down with trivial details operation, by user, to the control of volume key, just can open easily noise reduction process function; In addition, owing to having adopted self-adapting denoising processing method in the embodiment of the present invention, rather than adopt fixing noise reduction dynamics to carry out noise reduction process, therefore can to voice signal, carry out noise reduction process according to the size of environmental noise, especially under quiet environment, can process to strengthen by adaptive noise reduction the comfort level of people's ear, thereby improve user, experience; Further, because terminal is when reaching max volume grade, get button time that volume increases key while reaching the button operation instruction of Preset Time value, therefore just open noise reduction process function, when user does not have noise reduction process demand, effectively avoided opening by mistake and opened noise reduction process function, the system of having saved is processed resource, and, according to the average of environmental noise signal, determine noise reduction dynamics, simple and easy to do realization the adaptive noise reduction of voice signal is processed.
As shown in Figure 3, be another embodiment of denoise processing method of the present invention, this embodiment be take mobile phone in detail as example, shows in detail the process of carrying out adaptive noise reduction processing:
Conventionally on mobile phone, be provided with volume increase key and volume and reduce key, when user holds mobile phone and converses in noisy environment, can increase key to improve In Call by pressing volume, when mobile phone does not reach max volume grade, the volume getting each time increases the button operation instruction of key for the volume of mobile phone being heightened to a grade.
When mobile phone reaches max volume grade, in order to prevent user, because volume is pressed in maloperation, increase key, cause opening noise reduction process function, in the present embodiment, arrange when the button time of volume increase key reaches Preset Time value, just open this noise reduction process function, to prevent maloperation.In the present embodiment, for example, above-mentioned Preset Time value can be set to 2 seconds, and this embodiment of the present invention is not limited.
Optionally, the level of sound volume that can set in advance after mobile phone communication is set up is default volume grade, and this default volume grade can, lower than max volume grade, also can equal max volume grade.
In the embodiment of the present invention, after having opened noise reduction process function, can gather environmental noise signal around by Mike subsidiary on mobile phone (mi c).
Wherein, while determining noise reduction dynamics, can judge that whether the average of environmental noise signal is higher than predetermined threshold value, when higher than predetermined threshold value, determine that noise reduction dynamics is the first noise reduction dynamics, when lower than predetermined threshold value, determine that noise reduction dynamics is for the second noise reduction dynamics lower than the first noise reduction dynamics.
Above-mentioned the first noise reduction dynamics can be set to normal noise reduction dynamics, for example, can be set to 1, corresponding the second noise reduction dynamics is set to the numerical value lower than the first noise reduction dynamics, for example, can be set to 0.5 or 0, when being set to 0, be equivalent to close noise reduction process function.It should be noted that, above-mentioned is only a kind of example that arranges of noise reduction dynamics value, in practical application, can segment noise reduction dynamics, for example, more than three noise reduction dynamics is set in mobile phone, and this embodiment of the present invention is not limited.
In the present embodiment, anti-phase offseting signal can be determined by following formula:
Anti-phase offseting signal=environmental noise signal * noise reduction dynamics
Wherein, above-mentionedly pre-conditionedly can for volume, reduce key and continue the button operation instruction that button reaches Preset Time value for getting.
Wherein, when getting when meeting pre-conditioned volume and reducing the button operation instruction of key, close noise reduction process function.After closing noise reduction process function, optional, mobile phone can also be exported information of voice prompt, so that prompting user noise reduction process function is closed.
Therefore, in the denoise processing method of the embodiment of the present invention, because user is in noisy environment, can be subconscious by the volume key on mobile phone to heighten volume, therefore the embodiment of the present invention is carried out loaded down with trivial details operation without user, by user, to the control of volume key, just can open easily noise reduction process function; In addition, owing to having adopted self-adapting denoising processing method in the embodiment of the present invention, rather than adopt fixing noise reduction dynamics to carry out noise reduction process, therefore can to voice signal, carry out noise reduction process according to the size of environmental noise, especially under quiet environment, can process to strengthen by adaptive noise reduction the comfort level of people's ear, thereby improve user, experience; And because volume key is the original button on mobile phone, without for realizing starting hand-set noise reduction process function additional physical button on mobile phone, therefore effectively saved resource.
Corresponding with the embodiment of denoise processing method of the present invention, the present invention also provides the embodiment of noise reduction process device.
As shown in Figure 4, be an embodiment of noise reduction process device of the present invention, this device comprises:
Acquiring unit 401, for when terminal is exported voice signal, the button operation instruction of obtaining volume key;
Open unit 402, while meeting pre-conditioned button operation instruction for getting when described acquiring unit 401, open noise reduction process function;
Therefore, adopt the noise reduction process device of the embodiment of the present invention, first by acquiring unit 401 when the terminal output voice signal, obtain the button operation instruction of volume key, thereby get while meeting pre-conditioned button operation instruction at acquiring unit 401, by opening unit 402, open noise reduction process function, and carry out adaptive noise reduction processing by processing unit 403.Because user is in noisy environment, can be subconscious by volume key to heighten volume, therefore the embodiment of the present invention, without special button is set, is also carried out loaded down with trivial details operation without user, by user, to the control of volume key, just can open easily noise reduction process function; In addition, owing to having adopted self-adapting denoising processing method in the embodiment of the present invention, rather than adopt fixing noise reduction dynamics to carry out noise reduction process, therefore can to voice signal, carry out noise reduction process according to the size of environmental noise, especially under quiet environment, can process to strengthen by adaptive noise reduction the comfort level of people's ear, thereby improve user, experience.
In a specific embodiment of the invention described above noise reduction process device, described acquiring unit 401, the button operation instruction that increases key specifically for obtaining volume; Described unlatching unit 402, specifically for when described acquiring unit 401 is when described terminal reaches max volume grade, while getting the button operation instruction of volume increase key, opens noise reduction process function; Or described unlatching unit 402, specifically for when described acquiring unit 401 is when described terminal reaches max volume grade, gets button time that volume increases key while reaching the button operation instruction of Preset Time value, opens noise reduction process function.
As shown in Figure 5, be a specific embodiment of the above-mentioned processing unit 403 of the present invention, processing unit 403 comprises:
Obtain subelement 4031, for obtaining environmental noise signal;
Determine subelement 4032, for obtaining the environmental noise signal that subelement 4031 obtains described in basis, determine noise reduction dynamics;
In a specific embodiment of above-mentioned processing unit 403, described definite subelement 4032, specifically for the average of obtaining the environmental noise signal that subelement 4031 obtains described in judging whether higher than predetermined threshold value, when higher than described predetermined threshold value, determine that noise reduction dynamics is the first noise reduction dynamics, when lower than described predetermined threshold value, determine that noise reduction dynamics is for the second noise reduction dynamics lower than described the first noise reduction dynamics.
In a specific embodiment of above-mentioned processing unit 403, described processing subelement 4033, environmental noise signal and the determined noise reduction dynamics of described definite subelement 4032 specifically for obtaining subelement 4031 described in basis, obtained, produce the anti-phase offseting signal of described environmental noise signal, by after described voice signal and described anti-phase offseting signal stack, the voice signal obtaining after output noise reduction process.
Referring to Fig. 6, for applying the embodiment of a terminal of noise reduction process embodiment of the present invention:
This terminal can comprise: microphone 610, volume key 620 and processor 630, described microphone 610 is connected with described processor 630 respectively with described volume key 620.
Wherein, described microphone 610, for the voice signal of outlet terminal;
Described volume key 620, for when described microphone 610 is exported voice signal, the button operation instruction obtaining according to user's operation to described processor 630 inputs;
Described processor 630, for when get volume key 620 input meet pre-conditioned case operational order time, open noise reduction process function, and by described noise reduction process function, the voice signal of described microphone output carried out to adaptive noise reduction processing.
Wherein, volume key can comprise that volume increases key and volume reduces key.Optionally, described processor 630, can increase specifically for obtaining volume the button operation instruction of key; And when described terminal reaches max volume grade, while getting the button operation instruction of volume increase key, open noise reduction process function, or when described terminal reaches max volume grade, get button time that volume increases key while reaching the button operation instruction of Preset Time value, open noise reduction process function.
Optionally, described processor 630, can, specifically for obtaining environmental noise signal, determine noise reduction dynamics according to described border noise signal, and carry out adaptive noise reduction processing according to described noise reduction dynamics.
Optionally, described processor 630, can be specifically for the average of the environmental noise signal that obtains described in judging whether higher than predetermined threshold value, when higher than described predetermined threshold value, determine that noise reduction dynamics is the first noise reduction dynamics, when lower than described predetermined threshold value, determine that noise reduction dynamics is for the second noise reduction dynamics lower than described the first noise reduction dynamics;
Optionally, described processor 630, can be specifically for environmental noise signal and the described definite noise reduction dynamics of obtaining described in basis, produce the anti-phase offseting signal of described environmental noise signal, by after described voice signal and described anti-phase offseting signal stack, the voice signal obtaining after output noise reduction process.
It should be noted that, the noise reduction process device shown in earlier figures 4 can be integrated in the processor 630 of the terminal shown in the present embodiment.
As seen from the above-described embodiment, when terminal output voice signal, by obtaining the button operation instruction of volume key, thereby getting while meeting pre-conditioned button operation instruction, open noise reduction process function, voice signal is carried out to adaptive noise reduction processing.Because user is in noisy environment, can be subconscious by volume key to heighten volume, therefore the embodiment of the present invention, without special button is set, is also carried out loaded down with trivial details operation without user, by user, to the control of volume key, just can open easily noise reduction process function; In addition, owing to having adopted self-adapting denoising processing method in the embodiment of the present invention, rather than adopt fixing noise reduction dynamics to carry out noise reduction process, therefore can to voice signal, carry out noise reduction process according to the size of environmental noise, especially under quiet environment, can process to strengthen by adaptive noise reduction the comfort level of people's ear, thereby improve user, experience.
Professional can also further should be able to recognize, unit and the algorithm steps of each example of describing in conjunction with embodiment disclosed herein, can realize with electronic hardware, computer software or the combination of the two, for the interchangeability of hardware and software is clearly described, composition and the step of each example described according to function in the above description in general manner.These functions are carried out with hardware or software mode actually, depend on application-specific and the design constraint of technical scheme.Professional and technical personnel can specifically should be used for realizing described function with distinct methods to each, but this realization should not thought and exceeds the scope of the embodiment of the present invention.
The software module that the method for describing in conjunction with embodiment disclosed herein or the step of algorithm can directly use hardware, processor to carry out, or the combination of the two is implemented.
Above-mentioned explanation to the disclosed embodiments, makes professional and technical personnel in the field can realize or use the embodiment of the present invention.To the multiple modification of these embodiment, will be apparent for those skilled in the art, General Principle as defined herein can be in the situation that do not depart from the spirit or scope of the embodiment of the present invention, realization in other embodiments.Therefore, the embodiment of 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.
The foregoing is only the preferred embodiment of the embodiment of the present invention; not in order to limit the embodiment of the present invention; all within the spirit and principle of the embodiment of the present invention, any modification of doing, be equal to replacement, improvement etc., within all should being included in the protection domain of the embodiment of the present invention.
Claims (10)
1. a denoise processing method, is characterized in that, comprising:
When terminal output voice signal, the button operation instruction of obtaining volume key;
When getting while meeting pre-conditioned button operation instruction, open noise reduction process function;
By described noise reduction process function, described voice signal is carried out to adaptive noise reduction processing.
2. method according to claim 1, is characterized in that,
Described button operation instruction of obtaining volume key comprises: obtain the button operation instruction that volume increases key;
Described getting meets pre-conditioned button operation instruction and comprises:
When described terminal reaches max volume grade, get the button operation instruction that volume increases key; Or,
When described terminal reaches max volume grade, the button time that gets volume increase key reaches the button operation instruction of Preset Time value.
3. method according to claim 1 and 2, is characterized in that, describedly by described noise reduction process function, described voice signal is carried out to adaptive noise reduction processing, comprising:
Obtain environmental noise signal;
According to described environmental noise signal, determine noise reduction dynamics;
According to definite noise reduction dynamics, carry out adaptive noise reduction processing.
4. method according to claim 3, is characterized in that, describedly according to described environmental noise signal, determines noise reduction dynamics, comprising:
Judge that whether the average of described environmental noise signal is higher than predetermined threshold value;
When higher than described default thresholding, determine that noise reduction dynamics is the first noise reduction dynamics, when lower than described default thresholding, determine that noise reduction dynamics is for the second noise reduction dynamics lower than described the first noise reduction dynamics.
5. according to the method described in claim 3 or 4, it is characterized in that, describedly according to definite noise reduction dynamics, carry out adaptive noise reduction processing, comprising:
According to described environmental noise signal and described noise reduction dynamics, produce the anti-phase offseting signal of described environmental noise signal;
By after described voice signal and described anti-phase offseting signal stack, the voice signal obtaining after output noise reduction process.
6. a noise reduction process device, is characterized in that, comprising:
Acquiring unit, for when terminal is exported voice signal, the button operation instruction of obtaining volume key;
Open unit, while meeting pre-conditioned button operation instruction for getting when described acquiring unit, open noise reduction process function;
Processing unit, carries out adaptive noise reduction processing for the noise reduction process function of opening by described unlatching unit to described voice signal.
7. device according to claim 6, is characterized in that:
Described acquiring unit, the button operation instruction that increases key specifically for obtaining volume;
Described unlatching unit, specifically for when described acquiring unit is when described terminal reaches max volume grade, while getting the button operation instruction of volume increase key, opens noise reduction process function; Or,
Described unlatching unit, specifically for when described acquiring unit is when described terminal reaches max volume grade, gets button time that volume increases key while reaching the button operation instruction of Preset Time value, opens noise reduction process function.
8. according to the device described in claim 6 or 7, it is characterized in that, described processing unit comprises:
Obtain subelement, for obtaining environmental noise signal;
Determine subelement, for obtaining the environmental noise signal that subelement obtains described in basis, determine noise reduction dynamics;
Process subelement, for carrying out adaptive noise reduction processing according to the definite noise reduction dynamics of described definite subelement.
9. device according to claim 8, it is characterized in that, described definite subelement, specifically for the average of obtaining the environmental noise signal that subelement obtains described in judging whether higher than predetermined threshold value, when higher than described predetermined threshold value, determine that noise reduction dynamics is the first noise reduction dynamics, when lower than described predetermined threshold value, determine that noise reduction dynamics is for the second noise reduction dynamics lower than described the first noise reduction dynamics.
10. device according to claim 8 or claim 9, it is characterized in that, described processing subelement, environmental noise signal and the determined noise reduction dynamics of described definite subelement specifically for obtaining subelement described in basis, obtained, produce the anti-phase offseting signal of described environmental noise signal, by after described voice signal and described anti-phase offseting signal stack, the voice signal obtaining after output noise reduction process.
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| CN201210334092.8A CN103680510B (en) | 2012-09-11 | 2012-09-11 | Noise reduction process method and device |
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| CN103680510B (en) | 2016-06-29 |
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