CN107452368A - The noise-reduction method and device of a kind of home appliance - Google Patents
The noise-reduction method and device of a kind of home appliance Download PDFInfo
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- CN107452368A CN107452368A CN201710690362.1A CN201710690362A CN107452368A CN 107452368 A CN107452368 A CN 107452368A CN 201710690362 A CN201710690362 A CN 201710690362A CN 107452368 A CN107452368 A CN 107452368A
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Processing of the speech or voice signal to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
- G10L21/0208—Noise filtering
- G10L21/0264—Noise filtering characterised by the type of parameter measurement, e.g. correlation techniques, zero crossing techniques or predictive techniques
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/10—Applications
- G10K2210/105—Appliances, e.g. washing machines or dishwashers
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/10—Applications
- G10K2210/105—Appliances, e.g. washing machines or dishwashers
- G10K2210/1054—Refrigerators
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/30—Means
- G10K2210/301—Computational
- G10K2210/3018—Correlators, e.g. convolvers or coherence calculators
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/30—Means
- G10K2210/301—Computational
- G10K2210/3045—Multiple acoustic inputs, single acoustic output
Abstract
The present invention provides a kind of noise-reduction method and device of home appliance, and to solve the problems, such as that prior art is poor to household electrical appliances noise suppression effect, this method includes：Obtain the first noise signal and be arranged at the second noise signal collected on home appliance away from the second sound harvester at home appliance internal noise source for being arranged at that the first voice collection device at home appliance internal noise source collects；It will be influenceed to eliminate by extraneous environmental noise signal in the first noise signal according to the correlation of the first noise signal and the second noise signal, obtain home appliance first it is expected noise signal；It is expected noise signal generation noise cancellation signal according to first；Output noise offseting signal.The program can more accurately offset the internal noise of home appliance.
Description
Technical field
The present invention relates to communication field, more particularly to the noise-reduction method and device of a kind of home appliance.
Background technology
With the continuous development of smart home and the continuous lifting of people's living standard, smart home steps into people
Life in, such as intelligent refrigerator, intelligent washing machine and intelligent air condition etc., but these household electrical appliances in use can
Very big noise is sent, the compressor of such as refrigerator and air-conditioning, the motor of washing machine can all send very big noise at work,
Seriously affect the quality of life of people, with the fast development of artificial intelligence field, requirement of the people to various household electrical appliances also with
Raising, therefore, suppress or eliminate household electrical appliances caused by various noises be a very important problem.
At present, in the prior art in the presence of a kind of solution method：Prestore rotating speed-antiphase sonic data in noise reduction module
Storehouse, noise reduction module inquire about the database according to rotating speed and obtain initial antiphase sound wave, and play the initial antiphase sound wave and come pair
Noise is suppressed.Continuous with household electrical appliance is used, such as compressor, motor workpiece can continuous aging, its send out
The noise gone out can also change therewith, but this method is not able to be supported come what adaptive adjustment was generated according to the change of noise
Eliminated noise.
Another method is to gather noise in real time using voice collection device, and the noise of collection is analyzed in real time,
Noise signal is obtained, and produces control signal to generate antiphase signal, and plays the initial antiphase sound wave to enter to noise
Row suppresses.But in the case of interference being present in the external world, the family's electrical noise extracted is easy to be influenceed by external interference, Jin Erti
Family's electrical noise for taking is impure net, and it is inaccurate to eventually result in the counteracting noise of generation, although even and if then family's electrical noise subtracted
It is weak but generate new noise, meanwhile, the method a further disadvantage is that handling the data of all admissions in real time, answer by algorithm
Miscellaneous degree is very high, and power consumption is very big.
Although existing way can obtain certain noise suppression effect it can be seen from above existing method, but still
So disadvantages mentioned above be present, cause suppression household electrical appliances noise effects poor.
The content of the invention
The present invention provides a kind of noise-reduction method and device of home appliance, to solve prior art to family's electronic Noise Suppression
The problem of effect is poor.
According to an aspect of the invention, there is provided a kind of noise-reduction method of home appliance, including：Acquisition is arranged at household electrical appliances
The first noise signal and be arranged on home appliance remote that the first voice collection device at device interior noise source collects
The second noise signal collected from the second sound harvester at noise source；According to the first noise signal and the second noise
The correlation of signal will be influenceed to eliminate in the first noise signal by extraneous environmental noise signal, obtain the first of home appliance
It is expected noise signal；It is expected noise signal generation noise cancellation signal according to first；Output noise offseting signal.
Optionally, according to the correlation of the first noise signal and the second noise signal by the first noise signal by outer
The influence of boundary's ambient noise signal eliminates, and obtains the first of home appliance and it is expected noise signal, including：According to the first noise signal
And second noise signal correlation will in the first noise signal by extraneous environmental noise signal be influenceed eliminate, must get home
After noise signal caused by electric equipment internal noise source, extract in noise signal caused by home appliance internal noise source and reach pre-
If the part frequency of energy, obtain the first expectation noise signal.
Optionally, noise signal generation noise cancellation signal it is expected according to the first of acquisition, including：Extraction first it is expected to make an uproar
The feature of acoustical signal, judge first expectation noise signal feature and home appliance in store second it is expected noise signal spy
Whether sign is consistent, if unanimously, maintain to store in home appliance second it is expected the feature invariant of noise signal, if differed
Cause, then the feature replacement second for it is expected noise signal using first it is expected the feature of noise signal, it is expected noise signal by first
Characteristic storage to home appliance；Noise cancellation signal is generated according to the feature of the expectation noise signal stored in home appliance.
Optionally, the above method also includes：The first sound collection at home appliance internal noise source is arranged in acquisition
The first noise signal that device collects and being arranged on home appliance is adopted away from the second sound harvester at noise source
After the second noise signal collected, the first noise signal and the second noise signal are filtered, filter out default low frequency letter
Flip-flop in breath and signal.
Optionally, the household electrical appliances internal noise source that the first voice collection device and second sound harvester collect produces
The grade difference of noise signal be at least 6dB.
Optionally, obtain that the first voice collection device for being arranged at home appliance internal noise source collects first is made an uproar
Acoustical signal and the second noise signal collected on home appliance away from the second sound harvester at noise source is arranged at,
Including：Obtain the frequency corresponding with home appliance that the first voice collection device being arranged at home appliance internal noise source collects
First noise signal of section, and obtain to be arranged on home appliance and collected away from the second sound harvester at noise source
The second noise signal with home appliance corresponding frequency band.
Optionally, the above method also includes：The first sound collection at home appliance internal noise source is arranged in acquisition
The first noise signal that device collects and being arranged on home appliance is adopted away from the second sound harvester at noise source
Before the second noise signal collected, it is that the home appliance of longtime running or the household electrical appliances of intermittent operation are set to judge home appliance
It is standby；Obtain the first noise signal and set for being arranged at that the first voice collection device at home appliance internal noise source collects
The second noise signal collected on home appliance away from the second sound harvester at noise source is placed in, including：If family
Electric equipment is the home appliance of longtime running, then periodically obtains the first sound collection being arranged at home appliance internal noise source
The first noise signal that device collects and being arranged on home appliance is adopted away from the second sound harvester at noise source
The second noise signal collected；If home appliance is the home appliance of intermittent operation, obtained after home appliance start
It is arranged at the first noise signal and be arranged at house that the first voice collection device at home appliance internal noise source collects
The second noise signal collected in electric equipment away from the second sound harvester at noise source.
According to the second aspect of the invention, there is provided a kind of denoising device of home appliance, including：Acquisition module, use
The first noise signal and set that the first voice collection device at home appliance internal noise source collects are arranged in obtaining
It is placed in the second noise signal collected on home appliance away from the second sound harvester at noise source；Cancellation module, use
It will be believed according to the correlation of the first noise signal and the second noise signal in the first noise signal by extraneous environmental noise
Number influence eliminate, obtain home appliance first it is expected noise signal；Generation module, for it is expected noise signal according to first
Generate noise cancellation signal；Output module, for output noise offseting signal.
Optionally, above-mentioned cancellation module is specifically used for：According to the first noise signal and the correlation of the second noise signal
It will be influenceed to eliminate by extraneous environmental noise signal in the first noise signal, obtain making an uproar caused by home appliance internal noise source
After acoustical signal, the part frequency for reaching preset energy caused by home appliance internal noise source in noise signal is extracted, obtains the
One it is expected noise signal.
Optionally, above-mentioned generation module specifically includes：Extraction unit, for extracting the first feature for it is expected noise signal,
Second for judging the first feature for it is expected noise signal and being stored in home appliance it is expected whether the feature of noise signal is consistent, such as
Fruit is consistent, then maintain to store in home appliance second it is expected the feature invariant of noise signal, if it is inconsistent, using first
It is expected that the feature replacement second of noise signal it is expected the feature of noise signal, by the characteristic storage of the first expectation noise signal to family
Electric equipment；Generation unit, for generating noise cancellation signal according to the feature of the expectation noise signal stored in home appliance.
Optionally, said apparatus also includes：Filtration module, for obtaining be arranged at home appliance internal noise source the
The first noise signal and be arranged on home appliance away from the second sound at noise source that one voice collection device collects
After the second noise signal that harvester collects, the first noise signal and the second noise signal are filtered, filtered out
Flip-flop in default low-frequency information and signal.
Optionally, the household electrical appliances internal noise source that the first voice collection device and second sound harvester collect produces
The grade difference of noise signal be at least 6dB.
Optionally, above-mentioned acquisition module is specifically used for：Obtain the first sound being arranged at home appliance internal noise source
The first noise signal with home appliance corresponding frequency band that harvester collects, and obtain be arranged at it is remote on home appliance
The second noise signal with home appliance corresponding frequency band that second sound harvester at noise source collects.
Optionally, said apparatus also includes：Judge module, for being arranged in acquisition at home appliance internal noise source
The first noise signal and be arranged on home appliance away from the rising tone at noise source that first voice collection device collects
Before the second noise signal that sound harvester collects, it is the home appliance or intermittence of longtime running to judge home appliance
The home appliance of operation；
Acquisition module is specifically used for：In the case where judge module judges the home appliance that home appliance is longtime running,
Periodically obtain be arranged at the first noise signal that the first voice collection device at home appliance internal noise source collects and
It is arranged at the second noise signal collected on home appliance away from the second sound harvester at noise source；In judge module
In the case of judging the home appliance that home appliance is intermittent operation, obtained after home appliance start and be arranged at home appliance
The first noise signal and be arranged on home appliance remote make an uproar that the first voice collection device at internal noise source collects
The second noise signal that second sound harvester at sound source collects.
The present invention has the beneficial effect that：
Scheme provided in an embodiment of the present invention, it must be expired according to the internal noise signal and external noise signals that collect
Noise signal is hoped, noise cancellation signal is generated based on the expectation noise signal, suppresses outside noise interference, avoids prior art
The problem of home appliance noise inaccuracy of middle estimation, so as to more accurately generate counteracting noise.
Brief description of the drawings
Fig. 1 is the flow chart of the noise-reduction method of the home appliance provided in first embodiment of the invention；
Fig. 2 is the schematic diagram for offsetting noise signal in first embodiment of the invention using noise cancellation signal；
Fig. 3 is that the schematic diagram of noise signal it is expected in generation in the noise-reduction method of home appliance in second embodiment of the invention；
Fig. 4 is the structured flowchart of the denoising device of home appliance in third embodiment of the invention.
Embodiment
In order to solve the problems, such as that prior art is poor to household electrical appliances noise suppression effect, the invention provides a kind of home appliance
Noise-reduction method and device, below in conjunction with accompanying drawing and embodiment, the present invention will be described in further detail.It should be appreciated that
The specific embodiments described herein are merely illustrative of the present invention, does not limit the present invention.
First embodiment
A kind of noise-reduction method of home appliance is present embodiments provided, Fig. 1 is the flow chart of this method, as shown in figure 1, should
Method includes following processing：
Step 101：Obtain the first voice collection device being arranged at home appliance internal noise source collects first
Noise signal and the second sound harvester being arranged on home appliance at remote home appliance internal noise source collect
The second noise signal；
Refrigerator, air-conditioning and the laundry that involved home appliance includes but is not limited in smart home in the present embodiment
Machine etc..
In the step 101, the first noise signal can be by being arranged inside home appliance close to household electrical appliances internal noise source
The first voice collection device collect, the second noise signal can by be arranged on home appliance away from noise source second
Voice collection device obtains, and the first voice collection device and second sound harvester specifically can be real using microphone
It is existing.Specifically, the first voice collection device can be disposed adjacent on the position near the noise source inside home appliance, second
Voice collection device can be arranged on position of the edge of home appliance shell away from household electrical appliances internal noise source, this two collections
The sensitivity of device needs to be adjusted to identical grade, and its modes of emplacement will follow the household electrical appliances for causing the collection of the two harvesters
Noise grade difference caused by internal noise source is at least 6dB or more principle, and this grade difference is in possible scope
Inside it is the bigger the better.
Step 102：According to the correlation of the first noise signal and the second noise signal by the first noise signal by
The influence of extraneous environmental noise signal eliminates, and obtain home appliance first it is expected noise signal；
In the present embodiment, the first voice collection device can mainly collect larger family's electrical noise and external interference, the
Two voice collection devices can mainly collect less electrical noise and external interference, utilize the correlation in two-way voice signal
Information will receive the delay between outer signals and remove in two-way voice signal, after signal alignment, can be approximately considered the rising tone
The sound that sound harvester collects is external interference, therefore can obtain the approximate evaluation value of external interference, Ran Houjie accordingly
The estimate of outside noise is closed using outer in the signal for the first voice collection device being collected the methods of existing spectrum-subtraction
Boundary's interference signal removes, that is, obtains relatively pure family's electrical noise (noise signal i.e. inside home appliance).
An obtained electrical noise pure all the way is further analyzed processing, according to the energy information of each frequency, extracts it
The major frequency components of people's sense of hearing are disturbed in the stronger frequency content of middle energy, as noise caused by home appliance, extract house
Reach the part frequency of preset energy in noise signal inside electric equipment, obtain the first expectation noise signal, be defined as it is expected
Noise signal, that is, need the noise signal being cancelled, extract and store it is expected noise signal feature, this feature include frequency,
The information such as amplitude and phase.
Step 103：It is expected noise signal generation noise cancellation signal according to first；
In the step 103, according to the first frequency for it is expected signal generation frequency and energy and first desired signal and
Energy is identical, the signal of the opposite in phase of phase and first desired signal, as offseting signal.
In the present embodiment, step 101 and 102 be interim work, after the completion of close all processing modules immediately,
Until next stage arrival automatic start；Above-mentioned steps step 103 and 104 be chronicity work, that is, be in electricity work
During be always maintained at working condition.
Step 104：Output noise offseting signal.
The noise cancellation signal of output can offset the noise signal inside home appliance, in the present embodiment, using making an uproar
Sound offseting signal is as shown in Figure 2 to offset the realization principle figure of noise signal.
In the step 104, can specifically sound play device (such as loudspeaker) be used to be played towards noise source direction
Offseting signal, and then offset noise signal caused by home appliance.
The method that the present embodiment provides can also include：
Made an uproar in obtain that the first voice collection device for being arranged inside home appliance at the noise source collects first
What acoustical signal and the second sound harvester being arranged on home appliance at remote home appliance internal noise source collected
After second noise signal, the first noise signal and the second noise signal are filtered, filter out default low-frequency information and
Flip-flop in signal, can specifically be utilized respectively high-pass filter filter out low-frequency information that human ear can't hear and direct current into
Divide (for example, 0-20Hz spectrum information can be filtered out).
In the present embodiment, the household electrical appliances internal noise that the first voice collection device and second sound harvester collect
The grade difference of noise signal caused by source is at least 6dB.
In the present embodiment, for different types of home appliance, the specific executive mode of above-mentioned steps 101 is slightly not
Together, for example, home appliance for longtime running, for example, refrigerator, the home appliance with non-longtime running, for example, washing machine,
The Noise Acquisition opportunity of air-conditioning etc. is different, and based on this, the method that the present embodiment provides can also include:Performing the present embodiment
Before above-mentioned steps 101, it is the home appliance of longtime running or the home appliance of intermittent operation to judge home appliance；Herein
On the basis of, above-mentioned steps 101 then can specifically include：If home appliance is the home appliance of longtime running, periodically obtain
It is arranged at the first noise signal and be arranged at house that the first voice collection device at home appliance internal noise source collects
The second noise signal collected in electric equipment away from the second sound harvester at noise source；If home appliance is interval
Property operation home appliance, then obtain the first sound for being arranged at home appliance internal noise source after home appliance start and adopt
The first noise signal and be arranged on home appliance away from the second sound harvester at noise source that acquisition means collect
The second noise signal collected.The present embodiment obtains it is expected noise signal using the above method, based on the expectation noise signal
Noise cancellation signal is generated, suppresses outside noise interference, avoids the influence for the family's electrical noise degree of accuracy estimated in the prior art,
So as to more accurately generate counteracting noise.
Second embodiment
Present embodiments provide a kind of noise-reduction method of home appliance, the method that this method provides with above-mentioned first embodiment
Roughly the same, difference is, in the method that the present embodiment provides, can it is expected noise according to the noise signal generation collected
Signal, for replacing the expectation noise signal stored in home appliance.
Fig. 3 is that the schematic diagram of noise signal it is expected in generation in the noise-reduction method of home appliance in second embodiment of the invention,
The method that the present embodiment as shown in Figure 3 provides includes above-mentioned steps 101 to 104, on this basis, it is expected according to the first of acquisition
Noise signal generates noise cancellation signal, can specifically include：The feature of noise signal it is expected in extraction first, judges the first expectation
Second stored in the feature and home appliance of noise signal it is expected whether the feature of noise signal is consistent, if unanimously, tieed up
Second stored in electric equipment of running one's home it is expected the feature invariant of noise signal, if it is inconsistent, it is expected that noise is believed using first
Number feature replacement second it is expected the feature of noise signal, it is expected the characteristic storage of noise signal to home appliance by first；Root
Noise cancellation signal is generated according to the feature of the expectation noise signal stored in home appliance.
Wherein, updating the expectation noise signal stored in home appliance can specifically include：Contrast it is expected noise from first
Phase of the frequency, amplitude and phase information (feature for it is expected noise signal) obtained in signal with historical record in home appliance
Hope whether noise characteristic is consistent, unanimously then shows that the noise characteristic of home appliance does not change, maintains the expectation of historical record
Noise characteristic, it is inconsistent, show that the noise characteristic of home appliance is changed, it is necessary to update the phase recorded in home appliance
Hope noise characteristic.
The above method recorded based on the present embodiment, it can periodically update the expectation noise letter stored in home appliance
Number feature, specifically, for two kinds of different home appliances, can use two kinds of different update cycles,
In order to facilitate discussion, home appliance is divided into two classes for the time being in the present embodiment：The first kind be using rear motor or
The electrical equipment that compressor can be stopped, such as washing machine, the second class be after upper electricity motor or compressor always in the electrical equipment of work,
Such as refrigerator；For the first electric appliances, laggard expert's electrical noise renewal processing of starting shooting every time, for the second electric appliances, Mei Geyi
Section time (T) carries out family's electrical noise renewal processing, and T increases with service life, tapered into.
The method that the present embodiment provides, can be to household electrical appliances by the interim principle for updating the feature for it is expected noise signal
Equipment is classified, and updates the expectation noise signal stored in home appliance according to corresponding principle according to the classification of classification
Feature.It both can adaptively generate counteracting noise, reduce algorithm complex and power consumption again, it is also contemplated that with element
Aging and the time that noise is offset in renewal is gradually shortened, so as to more effectively suppress family electrical noise.
3rd embodiment
A kind of denoising device of home appliance is present embodiments provided, Fig. 4 is the structured flowchart of the device, as shown in figure 4,
The device includes following part：
Acquisition module 41, collected for obtaining the first voice collection device being arranged at home appliance internal noise source
The first noise signal and be arranged at second collected on home appliance away from the second sound harvester at noise source
Noise signal；
In the present embodiment, the first noise signal can be by being arranged inside home appliance close to household electrical appliances internal noise source
First voice collection device collects, and the second noise signal can be by being arranged on home appliance away from household electrical appliances internal noise source
Second sound harvester obtain, made an uproar inside the household electrical appliances that the first voice collection device and second sound harvester collect
The grade difference of noise signal caused by sound source is at least 6dB.
Cancellation module 42, for according to the correlation of the first noise signal and the second noise signal by the first noise signal
In by extraneous environmental noise signal influenceed eliminate, obtain home appliance first it is expected noise signal；
Generation module 43, for it is expected noise signal generation noise cancellation signal according to first；
Output module 44, for output noise offseting signal.
Above-mentioned cancellation module 42 specifically can be used for：Will according to the correlation of the first noise signal and the second noise signal
Influenceed to eliminate by extraneous environmental noise signal in first noise signal, obtain noise caused by home appliance internal noise source
After signal, the part frequency for reaching preset energy in noise signal caused by home appliance internal noise source is extracted, obtains first
It is expected noise signal.
Further, the device that the present embodiment provides can also include judge module, and the module is used to be arranged in acquisition
The first noise signal and be arranged at home appliance that the first voice collection device at home appliance internal noise source collects
Before the second noise signal that the upper second sound harvester away from noise source collects, it is to transport for a long time to judge home appliance
Capable home appliance or the home appliance of intermittent operation；Based on this, above-mentioned acquisition module 41 specifically can be used for：Judging
In the case that module judges the home appliance that home appliance is longtime running, periodically obtain and be arranged at home appliance internal noise source
First noise signal that collects of first voice collection device at place and it is arranged on home appliance away from the at noise source
The second noise signal that two voice collection devices collect；Judge that home appliance is that the intermittent household electrical appliances run are set in judge module
In the case of standby, the first voice collection device being arranged at home appliance internal noise source is obtained after home appliance start and is adopted
What the first noise signal collected and the second sound harvester being arranged on home appliance at remote noise source collected
Second noise signal.
Above-mentioned generation module 43 can specifically include consisting of part：
Extraction unit, for extract first it is expected noise signal feature, judge first expectation noise signal feature and
Second stored in home appliance it is expected whether the feature of noise signal is consistent, if unanimously, maintaining to store in home appliance
Second it is expected noise signal feature invariant, if it is inconsistent, use first it is expected noise signal feature replacement second
The feature of noise signal it is expected, by the characteristic storage of the first expectation noise signal to home appliance；Generation unit, for according to family
The feature generation noise cancellation signal of the expectation noise signal stored in electric equipment.
The device 40 that the present embodiment provides can also further include：Filtration module, for being arranged at household electrical appliances in acquisition
The first noise signal and be arranged on home appliance remote that the first voice collection device at device interior noise source collects
After the second noise signal collected from the second sound harvester at noise source, the first noise signal and second are made an uproar
Acoustical signal is filtered, and filters out the flip-flop in default low-frequency information and signal.
The present embodiment obtains it is expected noise signal using the above method, based on expectation noise signal generation noise cancellation letter
Number, suppress outside noise interference, the influence for the family's electrical noise degree of accuracy estimated in the prior art is avoided, so as to more accurate
Noise is offset in ground generation.The method that the present embodiment provides, can be with by the interim principle for updating the feature for it is expected noise signal
Home appliance is classified, the expectation noise stored in home appliance is updated according to corresponding principle according to the classification of classification
The feature of signal.It both can adaptively generate counteracting noise, reduce algorithm complex and power consumption again, it is also contemplated that with
Component ageing and the time that noise is offset in renewal is gradually shortened, so as to more effectively suppress family's electrical noise.
Although being example purpose, the preferred embodiments of the present invention are had been disclosed for, those skilled in the art will recognize
Various improvement, increase and substitution are also possible, and therefore, the scope of the present invention should be not limited to above-described embodiment.
Claims (14)
- A kind of 1. noise-reduction method of home appliance, it is characterised in that including：Obtain be arranged at the first noise signal that the first voice collection device at home appliance internal noise source collects and It is arranged at the second noise signal collected on the home appliance away from the second sound harvester at the noise source；According to the correlation of first noise signal and second noise signal by first noise signal by The influence of extraneous environmental noise signal eliminates, and obtain the home appliance first it is expected noise signal；It is expected noise signal generation noise cancellation signal according to described first；Export the noise cancellation signal.
- 2. according to the method for claim 1, it is characterised in that described according to first noise signal and described second The correlation of noise signal will be influenceed to eliminate in first noise signal by extraneous environmental noise signal, obtain the family The first of electric equipment it is expected noise signal, including：According to the correlation of first noise signal and second noise signal by first noise signal by The influence of extraneous environmental noise signal eliminates, and after obtaining noise signal caused by the home appliance internal noise source, extracts institute The part frequency for reaching preset energy in noise signal caused by home appliance internal noise source is stated, described first is obtained and it is expected to make an uproar Acoustical signal.
- 3. according to the method for claim 1, it is characterised in that the first expectation noise signal life according to acquisition Into noise cancellation signal, including：The described first feature for it is expected noise signal is extracted, judges that the feature of the first expectation noise signal is set with the household electrical appliances The second of standby middle storage it is expected whether the feature of noise signal is consistent, if unanimously, maintaining what is stored in the home appliance Described second it is expected the feature invariant of noise signal, if it is inconsistent, being replaced using the feature of the described first expectation noise signal The described second feature for it is expected noise signal is changed, by the characteristic storage of the described first expectation noise signal to the home appliance；Noise cancellation signal is generated according to the feature of the expectation noise signal stored in the home appliance.
- 4. according to the method for claim 1, it is characterised in that methods described also includes：Obtain be arranged at the first noise signal that the first voice collection device at home appliance internal noise source collects with And it is arranged at the second noise signal collected on the home appliance away from the second sound harvester at the noise source Afterwards, first noise signal and second noise signal are filtered, filter out default low-frequency information and signal In flip-flop.
- 5. according to the method for claim 1, it is characterised in that first voice collection device and the second sound The grade difference of noise signal is at least 6dB caused by the household electrical appliances internal noise source that harvester collects.
- 6. according to the method for claim 1, it is characterised in that the acquisition is arranged at home appliance internal noise source The first noise signal and be arranged on the home appliance away from the noise source that first voice collection device collects The second noise signal for collecting of second sound harvester, including：It is collecting with the home appliance pair to obtain the first voice collection device for being arranged at home appliance internal noise source The first noise signal of frequency range is answered, and obtains to be arranged on the home appliance and is adopted away from the second sound at the noise source The second noise signal with the home appliance corresponding frequency band that acquisition means collect.
- 7. according to the method described in any one of claim 1 to 6, it is characterised in that methods described also includes：Obtain be arranged at the first noise signal that the first voice collection device at home appliance internal noise source collects with And it is arranged at the second noise signal collected on the home appliance away from the second sound harvester at the noise source Before, it is the home appliance of longtime running or the home appliance of intermittent operation to judge the home appliance；The acquisition is arranged at the first noise signal that the first voice collection device at home appliance internal noise source collects And it is arranged at the second noise letter collected on the home appliance away from the second sound harvester at the noise source Number, including：If the home appliance is the home appliance of longtime running, periodically obtains and be arranged at home appliance internal noise source The first noise signal for collecting of the first voice collection device and be arranged on the home appliance away from the noise source The second noise signal that the second sound harvester at place collects；If the home appliance is the home appliance of intermittent operation, is obtained after home appliance start and be arranged at house The first noise signal that the first voice collection device at electric equipment internal noise source collects and it is arranged at the household electrical appliances and sets The second noise signal that second sound harvester at the standby remote noise source collects.
- A kind of 8. denoising device of home appliance, it is characterised in that including：Acquisition module, first collected for obtaining the first voice collection device being arranged at home appliance internal noise source Noise signal and it is arranged at the collected on the home appliance away from the second sound harvester at the noise source Two noise signals；Cancellation module, for described first to be made an uproar according to the correlation of first noise signal and second noise signal Influenceed to eliminate by extraneous environmental noise signal in acoustical signal, obtain the home appliance first it is expected noise signal；Generation module, for it is expected noise signal generation noise cancellation signal according to described first；Output module, for exporting the noise cancellation signal.
- 9. device according to claim 8, it is characterised in that the cancellation module is specifically used for：According to the correlation of first noise signal and second noise signal by first noise signal by The influence of extraneous environmental noise signal eliminates, and after obtaining noise signal caused by the home appliance internal noise source, extracts institute The part frequency for reaching preset energy in noise signal caused by home appliance internal noise source is stated, described first is obtained and it is expected to make an uproar Acoustical signal.
- 10. device according to claim 6, it is characterised in that the generation module specifically includes：Extraction unit, for extracting the described first feature for it is expected noise signal, judge the described first spy for it is expected noise signal Whether consistent the feature of the second expectation noise signal with being stored in the home appliance is levied, if unanimously, maintaining the family Stored in electric equipment described second it is expected the feature invariant of noise signal, if it is inconsistent, it is expected to make an uproar using described first The feature of the second expectation noise signal, it is expected the characteristic storage of noise signal extremely by described first described in the feature replacement of acoustical signal The home appliance；Generation unit, for generating noise cancellation signal according to the feature of the expectation noise signal stored in the home appliance.
- 11. device according to claim 8, it is characterised in that described device also includes：Filtration module, first collected for obtaining the first voice collection device being arranged at home appliance internal noise source Noise signal and it is arranged at the collected on the home appliance away from the second sound harvester at the noise source After two noise signals, first noise signal and second noise signal are filtered, filter out default low frequency letter Flip-flop in breath and signal.
- 12. device according to claim 8, it is characterised in that first voice collection device and the rising tone The grade difference of noise signal is at least 6dB caused by the household electrical appliances internal noise source that sound harvester collects.
- 13. device according to claim 8, it is characterised in that the acquisition module is specifically used for：It is collecting with the home appliance pair to obtain the first voice collection device for being arranged at home appliance internal noise source The first noise signal of frequency range is answered, and obtains to be arranged on the home appliance and is adopted away from the second sound at the noise source The second noise signal with the home appliance corresponding frequency band that acquisition means collect.
- 14. according to the device described in any one of claim 8 to 13, it is characterised in that described device also includes：Judge module, in obtain that the first voice collection device for being arranged at home appliance internal noise source collects the What one noise signal and the second sound harvester being arranged on the home appliance at the remote noise source collected Before second noise signal, it is that the home appliance of longtime running or the household electrical appliances of intermittent operation are set to judge the home appliance It is standby；The acquisition module is specifically used for：In the case where the judge module judges the home appliance that the home appliance is longtime running, periodically obtain and be arranged at The first noise signal and be arranged at the household electrical appliances that the first voice collection device at home appliance internal noise source collects The second noise signal collected in equipment away from the second sound harvester at the noise source；In the case where the judge module judges the home appliance that the home appliance is intermittent operation, set in the household electrical appliances Obtained after standby start and be arranged at the first noise signal that the first voice collection device at home appliance internal noise source collects And it is arranged at the second noise letter collected on the home appliance away from the second sound harvester at the noise source Number.
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| CN115602191A (en) * | 2022-12-12 | 2023-01-13 | 杭州兆华电子股份有限公司（Cn） | Noise elimination method of transformer voiceprint detection system |
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