CN106331257B - A kind of method of canceling noise, device and communication equipment - Google Patents
A kind of method of canceling noise, device and communication equipment Download PDFInfo
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- CN106331257B CN106331257B CN201610695831.4A CN201610695831A CN106331257B CN 106331257 B CN106331257 B CN 106331257B CN 201610695831 A CN201610695831 A CN 201610695831A CN 106331257 B CN106331257 B CN 106331257B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/19—Arrangements of transmitters, receivers, or complete sets to prevent eavesdropping, to attenuate local noise or to prevent undesired transmission; Mouthpieces or receivers specially adapted therefor
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
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Abstract
The invention discloses a kind of communication equipments, including wave detector, variable gain amplifier, coupled antenna, phase inverter, adder and switching switch, collected wireless electromagnetic field signal is converted into coupled electrical signal by coupled antenna, the amplitude for further adjusting envelope signal is the amplitude of noise envelope signal and envelope signal adjusted is sent to phase inverter, and phase inverter is made to generate reverse phase Injection Signal according to envelope signal adjusted；Adder generates audio output signal according to original audio signal and reverse phase Injection Signal；Switching switch is for switching over voice-frequency channel of the adder between the signal detection port of communication equipment and audio output.By applying this programme, the noise in the audio signal of the communication equipment output under different use states is effectively reduced, the sense of hearing comfort level of user is improved.
Description
Technical field
The present invention relates to field of communication technology more particularly to a kind of method of canceling noise, device and communication equipment.
Background technique
TDD (Time Division Duplexing) Time division duplex, in the duplex technology that mobile communication technology uses
One of, it is corresponding with FDD.TDD communication standard divides the communication resource by coordinate of time shaft, sequentially by each period
Distribute to the uplink and downlink communication of different user or some user.For each user, communication is all with one by one
(extremely short, with millisecond leveler) that BURST period form carries out, it is continuously uninterrupted different from the uplink and downlink of FDD standard.In hand
There are GSM, TD-SCDMA, TDD-LTE using TDD standard in machine communication.
When mobile communication work, inevitably can be partially coupled by the radiofrequency signal of handset antenna radiation to space
In audio parts and circuit, since the working frequency of TDD standard is very high, usually in several hundred megahertzs or more, significantly larger than audio
The working frequency of signal, human ear can't hear.But in the voicefrequency circuit of mobile phone include signal amplification unit, it is non-linear
Characteristic has envelope detection effect, and the BURST envelope that TDD can be manufactured experimently to high-frequency signal detects, since the frequency of BURST is logical
It is often several hundred hertz, belongs to the range of tonal range, human ear sensitive can be heard, therefore, detect the BURST envelope letter come
Number reform into the interference signal of audio.Also, the envelope of BURST signal by the detection of audio signal amplifying unit and can amplify, and mix
It closes into original audio signal.Since BURST is the regular length defined in communications standard specification, the detection of envelope institute
The naturally namely fixed duration of waveform out, is mixed into audio signal just into the noise of single fixed frequency.
In specific application scenarios it has been found that because of above-mentioned mechanism, the signal power of TDD communication is bigger (main
Depending on the signal strength of uplink transmitting, the intensity of down receiving signal is very small), the envelope range value being detected out is higher,
The noise signal strength of formation is bigger.Also, it will also result in corresponding noise signal hair when the use state of mobile phone changes
Changing.
It can be seen that real audio signal is exported how for the communication equipment elimination noise under different use states, into
And user's sense of hearing comfort level is promoted, become those skilled in the art's urgent problem to be solved.
Summary of the invention
The embodiment of the present application provides a kind of method of canceling noise, device and communication equipment, uses shape by adjusting different
The noise waveform in communication equipment output audio signal under state, to make the audio signal and original audio signal waveform of output
It is identical to achieve the purpose that noise reduction, while improving the sense of hearing comfort level of user.
In order to reach above-mentioned technical purpose, this application provides a kind of communication equipments, including wave detector, adjustable gain to amplify
Device, coupled antenna, phase inverter, adder and switching switch, in which:
The coupled antenna is used to be converted to institute's collected wireless electromagnetic field signal coupled electrical signal, and by the coupling
It closes electric signal and is sent to the wave detector；
The variable gain amplifier is used to control magnitude according to amplifier gain, by the wave detector according to the coupling
The range-adjusting for the envelope signal that electric signal generates is the amplitude of noise envelope signal, and envelope signal adjusted is sent to
The phase inverter, so that the phase inverter generates reverse phase Injection Signal according to the envelope signal adjusted；
The adder generates audio output signal according to original audio signal and reverse phase Injection Signal；
Switching switch for by the adder in the signal detection port of the communication equipment and audio output
Voice-frequency channel between end switches over.
Preferably,
The coupled antenna is disposed adjacent with the acoustical device of the communication equipment, and the radio frequency day with the communication equipment
The distance of line is not more than preset threshold value.
Preferably,
Gain of the amplifier gain control magnitude according to the noise envelope signal relative to the coupled electrical signal
Amplification factor generates.
Preferably,
When the use state of the communication equipment changes, between the adder and the signal detection port
Gap is in the conductive state during idle time for voice-frequency channel, and the signal detection port inputs the noise envelope signal and the reverse phase
The superposed signal of Injection Signal.
Preferably,
It is less than preset when controlling magnitude for the range-adjusting of the superposed signal according to updated amplifier gain
After amplitude thresholds, the voice-frequency channel between the adder and the audio output port is in the conductive state, and the audio is defeated
Exit port is connected with processing chip.
Correspondingly, the present invention also provides a kind of noise cancellation methods, which is characterized in that this method is applied to the communication
In equipment, this method further include:
When the use state of the communication equipment changes, the switching is switched from described according to the preset period
Audio output port switches to the signal detection port；
Judge whether the amplitude of the superposed signal of the signal detection port input is greater than preset amplitude thresholds, it is described folded
Plus signal is generated according to the noise envelope signal and the reverse phase Injection Signal；
If the amplitude of the superposed signal is greater than the amplitude thresholds, by the variable gain amplifier by the superposition
The range-adjusting of signal is no more than the amplitude thresholds, and by the corresponding amplifier of the variable gain amplifier adjusted
Gain controls magnitude as updated amplifier gain and controls magnitude；
If the amplitude of the superposed signal is not more than the amplitude thresholds, the switching is switched from the signal detection end
Mouth switches back into the audio output port.
Preferably, using the corresponding amplifier gain control magnitude of the variable gain amplifier adjusted as described in
After updated amplifier gain control magnitude, further includes:
Memory corresponding with the variable gain amplifier is written into the updated amplifier gain control magnitude.
Preferably,
The period is corresponding with the free timeslot of the communication equipment current network.
In addition, the application additionally provides a kind of noise elimination apparatus simultaneously, which is applied in communication equipment above-mentioned,
The device includes:
First switching module:, will be described according to the preset period when the use state of the communication equipment changes
Switching switch switches to the signal detection port from the audio output port；
Judgment module: judge whether the amplitude of the superposed signal of the signal detection port input is greater than preset amplitude threshold
Value, the superposed signal are generated according to the noise envelope signal and the reverse phase Injection Signal；
It adjusts module: if the amplitude of the superposed signal is greater than the amplitude thresholds, passing through the variable gain amplifier
It is to be corresponded to less than the amplitude thresholds, and by the variable gain amplifier adjusted by the range-adjusting of the superposed signal
Amplifier gain control magnitude as updated amplifier gain control magnitude；
Second switching module: if the amplitude of the superposed signal be not more than the amplitude thresholds, by the switching switch from
The signal detection port switching returns the audio output port.
Preferably, using the corresponding amplifier gain control magnitude of the variable gain amplifier adjusted as described in
After updated amplifier gain control magnitude, further includes:
Memory corresponding with the variable gain amplifier is written into the updated amplifier gain control magnitude.
Compared with prior art, the advantageous effects for the technical solution that the embodiment of the present application is proposed include:
The embodiment of the present application discloses a kind of communication equipment, including wave detector, variable gain amplifier, coupled antenna, anti-
Phase device, adder and switching switch, are converted to coupled electrical signal for collected wireless electromagnetic field signal by coupled antenna,
The amplitude of adjustment envelope signal is the amplitude of noise envelope signal and envelope signal adjusted is sent to phase inverter, makes reverse phase
Device generates reverse phase Injection Signal according to envelope signal adjusted；Adder is according to original audio signal and reverse phase Injection Signal
Generate audio output signal；Switching switch for by adder the signal detection port of communication equipment and audio output it
Between voice-frequency channel switch over.By applying this programme, the communication equipment output under different use states is effectively reduced
Noise in audio signal improves the sense of hearing comfort level of user.
Detailed description of the invention
It, below will be to attached drawing needed in embodiment description in order to illustrate more clearly of the technical solution of the application
It is briefly described, it should be apparent that, the drawings in the following description are only some examples of the present application, general for this field
For logical technical staff, without creative efforts, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of structural schematic diagram of the communication equipment proposed in the embodiment of the present application；
Fig. 2 is a kind of flow diagram for noise cancellation method that the embodiment of the present application proposes；
Fig. 3 is a kind of removing method flow diagram of the TDD noise proposed in the application preferred embodiment；
Fig. 4 is to illustrate in specific application scenarios using the communicating equipment circuit that TDD method of canceling noise carries out noise reduction
Figure；
Fig. 5 is in specific application scenarios, and the position distribution of coupled antenna and acoustical device in a communications device is illustrated
Figure；
Fig. 6 is that the flow diagram of reverse phase Injection Signal is generated by radiofrequency signal in specific application scenarios；
Fig. 7 is that the schematic illustration of TDD noise is eliminated by superposition in specific application scenarios；
Fig. 8 is a kind of structural schematic diagram of the noise elimination apparatus proposed in the embodiment of the present application.
Specific embodiment
The problem of in view of being previously mentioned in the application background technique, in communication device works, TDD standard itself meeting can not
The generation wireless electromagnetic field signal avoided makes original audio signal be interfered to form noise, to reduce user using logical
Believe sense of hearing comfort level when equipment.
Present applicant proposes a kind of method of canceling noise, device and communication equipments, by generating and noise envelope signal
Opposite reverse phase Injection Signal offsets the noise generated due to TDD standard itself, thus make the audio signal of output with it is original
Audio signal waveform is identical to reach noise reduction, moreover it is possible to according to the purpose of communication terminal, improve the sense of hearing comfort level of user.
As shown in Figure 1, for the embodiment of the present application propose a kind of communication equipment structural schematic diagram, including wave detector, can
Gain amplifier, coupled antenna, phase inverter, adder and switching switch, each important feature component is adjusted to be described below:
(1) coupled antenna is used to being converted to the collected wireless electromagnetic field signal of institute into coupled electrical signal, and will coupling electricity
Signal is sent to wave detector；
In the application preferred embodiment, communication equipment further includes for receiving or the acoustics device of output audio signal
Part, coupled antenna is disposed adjacent with the acoustical device of communication equipment, and the distance between coupled antenna and acoustical device are closer
It is better, preset threshold value should be not more than, be here first threshold by the threshold definitions.Its purpose is to guarantee that coupled antenna connects
The case where wireless electromagnetic field signal situation received is received close to acoustical device.Meanwhile in specific application scenarios, communication is set
Standby further includes radio-frequency antenna, and the distance between coupled antenna and radio-frequency antenna cannot be excessively close, to reduce coupled antenna to radio frequency day
The influence that line works normally, distance between the two should be greater than a preset threshold value, be here difference by the threshold definitions
In the second threshold of first threshold.
(2) variable gain amplifier is used to control magnitude according to amplifier gain, and wave detector is raw according to coupled electrical signal
At envelope signal range-adjusting be noise envelope signal amplitude, and envelope signal adjusted is sent to phase inverter,
So that phase inverter generates reverse phase Injection Signal according to envelope signal adjusted；
In the application preferred embodiment, the value of amplifier gain control amount is according to noise envelope signal relative to coupling electricity
The gain amplification factor of signal determines generation.Wherein, the time of reverse phase Injection Signal waveform corresponding with noise envelope signal
It synchronizes, wave-shape amplitude is equal, opposite in phase.
(3) adder is used to generate audio output signal according to original audio signal and reverse phase Injection Signal；
(4) switching switch is for the sound by adder between the signal detection port of communication equipment and audio output
Frequency access switches over.
In the application preferred embodiment, (such as it is changed to by handheld state when the use state of communication equipment changes
It is placed on desk), the coefficient of coup, radio-frequency antenna and sound due to the variation of external environment, between radio-frequency antenna and coupled antenna
The coefficient of coup between frequency device is likely to change, and in this case, reverse phase Injection Signal is possible to and couples
The amplitude of electric signal generates difference, causes noise that can not be eliminated to inaudible degree, for the audio signal user of output
Still noise can be heard.
Therefore, when the use state of communication equipment changes, the audio between adder and signal detection port is logical
Gap is in the conductive state during idle time on road, and signal detection port output noise envelope signal is superimposed letter with reverse phase Injection Signal
Number, and be less than preset amplitude threshold when controlling magnitude for the range-adjusting of superposed signal according to updated amplifier gain
After value, the voice-frequency channel between adder and audio output port is in the conductive state.It is namely small in the amplitude of superposed signal
After the meeting in preset threshold, superposed signal is exported, it is adjusted due to controlling magnitude according to updated amplifier gain at this time
The amplitude of superposed signal is smaller, thus the noise in the audio signal exported be it is inaudible, reach for different using shape
The purpose that noise envelope signal under state is eliminated automatically.
By above-mentioned communication equipment, it can be directed to different use states, adjustment amplifier gain controls magnitude, makes to export
Superposed signal in noise signal can not be perceived by the user, hear, therefore effectively reduce under different use states
Noise in the audio signal of communication equipment output, improves the sense of hearing comfort level of user.
Based on the communication equipment that above embodiments propose, the application also proposed a kind of noise cancellation method, to not
Audio signal with the communication equipment output under use state carries out specific aim adjustment, to be effectively reduced in output audio signal
Noise.As shown in Fig. 2, this method is applied to mention as aforementioned for a kind of noise cancellation method proposed in the embodiment of the present application
In communication equipment out, this method further include:
Step 201: when the use state of the communication equipment changes, opening the switching according to the preset period
It closes from the audio output port and switches to the signal detection port.
Since in specific application scenarios, the variation of communication equipment use state objectively will affect in communication equipment
The coefficient of coup between portion's coupled antenna and radio-frequency antenna, so when the use state of communication equipment changes, need and
When to adder output superposed signal carry out detection judgement, so need by switching switch port cut by audio output port
Shift to signal detection port.Wherein, predetermined period is corresponding with the free timeslot of communication equipment current network.
Step 202: judging whether the amplitude of the superposed signal of the signal detection port input is greater than preset amplitude threshold
Value, the superposed signal are generated according to the noise envelope signal and the reverse phase Injection Signal.
After being changed due to the use state in communication equipment, the coefficient of coup between inside communication equipment element also can
It changes, so the amplitude of superposed signal is compared with preset threshold value, if whether the amplitude of superposed signal is big
In preset threshold value, then show that the amplifier gain control amount under current state is unable to reach ideal noise reduction effect, needs pair
Amplifier increment control magnitude is adjusted.
Step 203:, will by the variable gain amplifier if the amplitude of the superposed signal is greater than the amplitude thresholds
The range-adjusting of the superposed signal is to correspond to no more than the amplitude thresholds, and by the variable gain amplifier adjusted
Amplifier gain control magnitude as updated amplifier gain control magnitude.
In the application preferred embodiments, by the corresponding amplifier gain control amount of variable gain amplifier adjusted
After value is as updated amplifier gain control magnitude, further includes:
Memory corresponding with the variable gain amplifier, mesh is written into updated amplifier gain control magnitude
Be, when switching switching to audio output port, last updated amplifier stored in memory is called to increase
Noise is inaudible state in audio signal of the benefit control magnitude to guarantee output, achievees the effect that noise reduction.
Step 204: if the amplitude of the superposed signal is not more than the amplitude thresholds, the switching being switched from the letter
Number detection port switch back into the audio output port.
In the application preferred embodiment, if the amplitude of superposed signal is not more than preset threshold value, show current shape
Amplifier gain control amount under state can achieve ideal noise reduction effect, not need to adjust amplifier increment control magnitude
It is whole, superposed signal is directly passed through audio output port be sent to processing chip handle.
It can be seen that by the scheme proposed using the application, when the use state of communication equipment changes, according to
Switching switch is switched to signal detection port from audio output port by the preset period, is greater than amplitude in the amplitude of superposed signal
It by the range-adjusting of superposed signal is less than amplitude thresholds, and by superposition adjusted by variable gain amplifier when threshold value
Signal is sent to processing chip by audio output port and handle simultaneously final output.To make the audio signal and original of output
Beginning audio signal waveform is identical to achieve the purpose that noise reduction, effectively reduces the audio of the communication equipment output under different use states
Noise in signal improves the sense of hearing comfort level of user.
It should be noted that described embodiment is a part of the embodiment of the application, instead of all the embodiments.
Based on the embodiment in the application, those of ordinary skill in the art institute obtained without making creative work
There are other embodiments, shall fall in the protection scope of this application.
Below in conjunction with the attached drawing in the application, clear, complete description is carried out to the technical solution in the application, is shown
So, described embodiment is a part of the embodiment of the application, instead of all the embodiments.Based on the implementation in the application
Example, those of ordinary skill in the art's every other embodiment obtained without making creative work, all belongs to
In the range of the application protection.
As shown in figure 3, for a kind of removing method flow diagram of the TDD noise proposed in the embodiment of the present application, the party
The principle that method utilizes signal inversion to offset, by placing a coupling in acoustical device (such as Mike, earpiece, loudspeaker) attachment
Antenna, one signal changed with TDD standard radiofrequency signal time synchronization, signal amplitude equal proportion of coupling, which is carried out
After some processing such as envelope detection, amplification, reverse phase, obtain and audio TDD noise is equal in magnitude, Injection Signal of amplitude inversion,
The Injection Signal and the audio signal of having mixed interference noise is superimposed, so that institute's Injection Signal is added with noise signal amplitude
After be zero, and then only be left audio signal identical with original signal, as shown in figure 4, for using this method carry out noise reduction leading to
Believe circuitry schematic diagram.This method specifically includes:
Step 301: inductive coupling radiofrequency signal.
Specifically, needing to place in acoustical device (such as Mike, earpiece, loudspeaker) attachment in actual application scenarios
One coupled antenna, coupled antenna is the smaller the better at a distance from acoustical device (it is recommended that within 2 centimetres), guarantees coupled antenna
The wireless electromagnetic field signal situation received is close to the reception condition of acoustical device, and coupled antenna will be protected with radio-frequency antenna
A certain distance (it is recommended that 1 centimetre or more) is held, to reduce the influence worked normally to radio-frequency antenna, as shown in figure 5, for coupling day
Line and the position distribution schematic diagram of acoustical device in a communications device.Since radio-frequency antenna, coupled antenna relative position are fixed, two
It there is a coefficient of coup, that is, the collected wireless electromagnetic field signal energy of institute's coupled antenna and radio-frequency antenna between person
There are a proportionate relationships (seeing below formula) for the energy launched.When radio-frequency antenna radiant power by base station controlled in real time into
When row variation, the collected wireless electromagnetic field signal power of coupled antenna can also carry out equal proportion variation simultaneously.
Pc=Kc × Po
Wherein, Pc is the collected wireless electromagnetic field signal power of coupled antenna；
The coefficient of coup of the Kc between coupled antenna and radio-frequency antenna；
Po is the wireless electromagnetic field signal power that radio-frequency antenna radiates.
Step 302: detected envelope waveform.
Specifically, acquiring wireless electromagnetic field signal by coupled antenna, coupled antenna believes collected radio magnetic field
Number electric signal is converted to, is sent to subsequent envelope detector circuit, it will be described wireless by the detecting action of envelope detector
Coupled electrical signal envelope detection in electromagnetic field signal comes out (envelope equal proportion phase of the envelope i.e. with detection on voicefrequency circuit
Like), and the envelope waveform after detection is sent into variable gain amplifier again.
Step 303: carrying out controllable gain amplification.
Specifically, adjustable gain amplifier receives the envelope waveform after detection, and the envelope waveform will be corresponded to
Envelope signal carries out controlled amplification.
Step 304: generating amplitude inversion signal.
Specifically, then passing through phase inverter by amplified envelope signal, become the signal of amplitude mirror image, Take me as I am
Required for reverse phase Injection Signal, measure the injection of coupling detection goes out on voice-frequency channel noise envelope amplitude and generation respectively
Signal amplitude, gain adjustable amplifier magnification ratio make the two amplitude reverse phase equal；By amplifier gain control at this moment
Magnitude is written in cell phone software, can obtain generate amplitude reverse phase Injection Signal appropriate based on this later, wherein the reverse phase letter
Number compared with the envelope signal, time synchronization, amplitude be equal, opposite in phase, be illustrated in figure 6 generated by radiofrequency signal it is anti-
The flow diagram of phase Injection Signal.
Step 305: generated signal and voicefrequency circuit Signal averaging carry out operation.
Specifically, sending the audio signal for being mixed with TDD noise to adder circuit Single port, the reverse phase of generation injects letter
It number send to adder another port, the two does amplitude superposition in adder.Due to the TDD noise mixed in input audio signal
Both signal and reverse phase Injection Signal time synchronization, amplitude reverse phase are equal, so exported after superposition from adder circuit
Signal is i.e. identical as original audio signal waveform, is equivalent to the TDD noise for eliminating and adulterating in audio signal.By adder circuit
Output end signal send to audio tweeter, then there is no TDD interference noises for the sound that user hears.
Step 306: obtaining denoising audio signal.
Specifically, being sent the audio signal for being mixed with TDD noise to adder circuit Single port by the above method, generate
Reverse phase Injection Signal send to adder another port, the two is amplitude superposition, the TDD in such audio signal in adder
Noise signal and reverse phase Injection Signal are due to inversion signal each other, it is possible to cancel out each other, the audio signal of output is to go
Audio signal after making an uproar, as shown in fig. 7, to eliminate the schematic diagram of TDD noise by superposition.
It should be noted that the use state when mobile phone changes (such as being changed to be put on desk by handheld state),
Due to the variation of external environment, the coefficient of coup, radio-frequency antenna between radio-frequency antenna and coupled antenna and between audio parts
The coefficient of coup is likely to change, and this variation is to change caused by being changed as use state with signal amplitude power
It is unrelated.Under this variation, reverse phase Injection Signal is possible to generate difference with the amplitude of audio TDD noise, and audio TDD is caused to make an uproar
Sound can not be all eliminated, and user still may hear weaker audio TDD noise.
For the variation of this use state, system is needed to be capable of the gain of adjust automatically gain adjustable amplifier, from
And change the amplitude of reverse phase Injection Signal, reach with the amplitudes such as audio TDD noise, make an uproar to eliminate as much as all audio TDD
Sound.
In the present invention, increase a switching switch behind adder, it can be by voice-frequency channel in audio interface and letter
Number detection port between switch.Due to TDD trial-production be it is time-multiplexed, only partial time slot (Slot) is to be used for transmission signal
, remaining time slot is that the free time is unused, therefore, can use free timeslot, access is periodically switched to signal detection end
Mouthful.At this point, there was only audio TDD noise and reverse phase injection in voice-frequency channel due to the effective audio signal for not having user to input
Signal, the signal amplitude after signal detection port can be superimposed TDD noise with reverse phase Injection Signal detect.System meeting
The signal amplitude threshold value (level that user of being subject to will not perceive) for setting a default, when the superposed signal amplitude detected
When greater than threshold value, system can be adjusted the gain of variable gain amplifier by gain control end mouth, make superposed signal width
Value is finally less than threshold value, adjusts to realize to the real-time dynamic of gain.System can the yield value in time by this new formation write
Enter in memory, when voice-frequency channel is switched to audio interface, the yield value that system will call this new, to be effectively ensured
The quality of audio signal.
The scheme that the embodiment of the present application is proposed is generated and the TDD by the corresponding waveform of acquisition TDD noise signal
Noise waveform time synchronization, amplitude be equal, opposite in phase reverse phase Injection Signal, by by the reverse phase Injection Signal and audio
Signal is superimposed, to offset TDD noise signal present in audio signal, to effectively reduce the TDD in audio signal
Noise improves the audio experience of user.
It should be noted that described embodiment is a part of the embodiment of the application, instead of all the embodiments.
Based on the embodiment in the application, those of ordinary skill in the art institute obtained without making creative work
There are other embodiments, shall fall in the protection scope of this application.
Based on inventive concept same as the above method, the embodiment of the present application also proposed a kind of noise elimination apparatus,
Structural schematic diagram is as shown in figure 8, the device includes:
First switching module 810: when the use state of the communication equipment changes, according to the preset period by institute
It states switching switch and switches to the signal detection port from the audio output port；
Judgment module 820: judge whether the amplitude of the superposed signal of the signal detection port input is greater than preset width
It is worth threshold value, the superposed signal is generated according to the noise envelope signal and the reverse phase Injection Signal；
It adjusts module 830: if the amplitude of the superposed signal is greater than the amplitude thresholds, being amplified by the adjustable gain
The range-adjusting of the superposed signal is less than the amplitude thresholds, and by the variable gain amplifier pair adjusted by device
The amplifier gain control magnitude answered controls magnitude as updated amplifier gain；
Second switching module 840: if the amplitude of the superposed signal is not more than the amplitude thresholds, the switching is switched
The audio output port is returned from the signal detection port switching.
In specific application scenarios, controlled by the corresponding amplifier gain of the variable gain amplifier adjusted
After magnitude is as the updated amplifier gain control magnitude, further includes:
Memory corresponding with the variable gain amplifier is written into the updated amplifier gain control magnitude.
It can be seen that by the scheme proposed using the application, when the use state of communication equipment changes, according to
Switching switch is switched to signal detection port from audio output port by the preset period, is greater than amplitude in the amplitude of superposed signal
It by the range-adjusting of superposed signal is less than amplitude thresholds, and by superposition adjusted by variable gain amplifier when threshold value
Signal is sent to processing chip by audio output port and handle simultaneously final output.To make the audio signal and original of output
Beginning audio signal waveform is identical to achieve the purpose that noise reduction, effectively reduces the audio of the communication equipment output under different use states
Noise in signal improves the sense of hearing comfort level of user.
Through the above description of the embodiments, those skilled in the art can be understood that the present invention can lead to
Hardware realization is crossed, the mode of necessary general hardware platform can also be added to realize by software.Based on this understanding, this hair
Bright technical solution can be embodied in the form of software products, which can store in a non-volatile memories
In medium (can be CD-ROM, USB flash disk, mobile hard disk etc.), including some instructions are used so that a computer equipment (can be
Personal computer, server or network equipment etc.) execute method described in each implement scene of the present invention.
It will be appreciated by those skilled in the art that the accompanying drawings are only schematic diagrams of a preferred implementation scenario, module in attached drawing or
Process is not necessarily implemented necessary to the present invention.
It will be appreciated by those skilled in the art that the module in device in implement scene can be described according to implement scene into
Row is distributed in the device of implement scene, can also be carried out corresponding change and is located at the one or more dresses for being different from this implement scene
In setting.The module of above-mentioned implement scene can be merged into a module, can also be further split into multiple submodule.
Aforementioned present invention serial number is for illustration only, does not represent the superiority and inferiority of implement scene.
Disclosed above is only several specific implementation scenes of the invention, and still, the present invention is not limited to this, Ren Heben
What the technical staff in field can think variation should all fall into protection scope of the present invention.
Claims (10)
1. a kind of communication equipment, including wave detector, variable gain amplifier, which is characterized in that further include coupled antenna, reverse phase
Device, adder and switching switch, in which:
The coupled antenna is used to the collected wireless electromagnetic field signal of institute being converted to coupled electrical signal, and the coupling is electric
Signal is sent to the wave detector；
The variable gain amplifier is used to control magnitude according to amplifier gain, by the wave detector according to the coupling telecommunications
The range-adjusting of number envelope signal generated is the amplitude of noise envelope signal, and envelope signal adjusted is sent to described
Phase inverter, so that the phase inverter generates reverse phase Injection Signal according to the envelope signal adjusted；
The adder generates audio output signal according to original audio signal and reverse phase Injection Signal；
Switching switch for by the adder the signal detection port of the communication equipment and audio output it
Between voice-frequency channel switch over.
2. communication equipment as described in claim 1, which is characterized in that
The coupled antenna is disposed adjacent with the acoustical device of the communication equipment, and with the radio-frequency antenna of the communication equipment
Distance is not more than preset threshold value.
3. communication equipment as described in claim 1, which is characterized in that
Gain of the amplifier gain control magnitude according to the noise envelope signal relative to the coupled electrical signal is amplified
Multiple generates.
4. communication equipment as described in any one of claims 1-3, which is characterized in that
Audio when the use state of the communication equipment changes, between the adder and the signal detection port
Gap is in the conductive state during idle time for access, and the signal detection port inputs the noise envelope signal and the reverse phase is injected
The superposed signal of signal.
5. communication equipment as claimed in claim 4, which is characterized in that
It is less than preset amplitude when controlling magnitude for the range-adjusting of the superposed signal according to updated amplifier gain
After threshold value, the voice-frequency channel between the adder and the audio output port is in the conductive state, the audio output
Mouth is connected with processing chip.
6. a kind of noise cancellation method, which is characterized in that this method is applied to communication as described in any one in claim 1-5 and sets
In standby, this method further include:
When the use state of the communication equipment changes, the switching is switched from the audio according to the preset period
Output port switches to the signal detection port；
Judge whether the amplitude of the superposed signal of the signal detection port input is greater than preset amplitude thresholds, the superposition letter
It number is generated according to the noise envelope signal and the reverse phase Injection Signal；
If the amplitude of the superposed signal is greater than the amplitude thresholds, by the variable gain amplifier by the superposed signal
Range-adjusting be no more than the amplitude thresholds, and by the corresponding amplifier gain of the variable gain amplifier adjusted
Magnitude is controlled as updated amplifier gain and controls magnitude；
If the amplitude of the superposed signal is not more than the amplitude thresholds, the switching is switched from the signal detection port and is cut
Gain the audio output port.
7. method as claimed in claim 6, which is characterized in that putting the variable gain amplifier adjusted is corresponding
After big device gain control magnitude is as the updated amplifier gain control magnitude, further includes:
Memory corresponding with the variable gain amplifier is written into the updated amplifier gain control magnitude.
8. the method for claim 7, which is characterized in that
The period is corresponding with the free timeslot of the communication equipment current network.
9. a kind of noise elimination apparatus, which is characterized in that the device is applied to communication as described in any one in claim 1-5 and sets
In standby, the device further include:
First switching module: when the use state of the communication equipment changes, according to the preset period by the switching
Switch switches to the signal detection port from the audio output port；
Judgment module: judging whether the amplitude of the superposed signal of the signal detection port input is greater than preset amplitude thresholds,
The superposed signal is generated according to the noise envelope signal and the reverse phase Injection Signal；
Adjust module: if the amplitude of the superposed signal is greater than the amplitude thresholds, by the variable gain amplifier by institute
The range-adjusting for stating superposed signal is to put less than the amplitude thresholds, and by the variable gain amplifier adjusted is corresponding
Big device gain control magnitude controls magnitude as updated amplifier gain；
Second switching module: if the amplitude of the superposed signal is not more than the amplitude thresholds, the switching is switched from described
Signal detection port switching returns the audio output port.
10. device as claimed in claim 9, which is characterized in that the variable gain amplifier adjusted is corresponding
After amplifier gain controls magnitude as the updated amplifier gain control magnitude, further includes:
Memory corresponding with the variable gain amplifier is written into the updated amplifier gain control magnitude.
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| CN108540659B (en) * | 2018-03-29 | 2021-05-18 | 努比亚技术有限公司 | Method, terminal and computer readable storage medium for reducing TDD noise influence |
| CN109660274B (en) * | 2018-12-27 | 2021-01-08 | 维沃移动通信有限公司 | Power coupler, terminal and setting method of coupling parameters |
| CN111063333A (en) * | 2019-12-19 | 2020-04-24 | 湖南国声声学科技股份有限公司 | Adaptive noise reduction method, adaptive noise reduction system, adaptive noise reduction device, and computer-readable storage medium |
| WO2022052064A1 (en) | 2020-09-11 | 2022-03-17 | 深圳市汇顶科技股份有限公司 | Capacitance measurement circuit, touch chip, and electronic device |
| CN111813271B (en) * | 2020-09-11 | 2021-05-25 | 深圳市汇顶科技股份有限公司 | Capacitance detection circuit, touch chip and electronic equipment |
| CN112702023B (en) * | 2020-12-18 | 2023-12-08 | Oppo广东移动通信有限公司 | Power supply device and method of audio power amplifier circuit, related circuit and electronic equipment |
| CN112671416B (en) * | 2020-12-29 | 2022-05-13 | 维沃移动通信有限公司 | Communication processing method and device and electronic equipment |
| CN113395637B (en) * | 2021-06-10 | 2022-09-09 | 上海傅硅电子科技有限公司 | Control method for output voltage of audio power amplifier chip |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201657063U (en) * | 2010-05-19 | 2010-11-24 | 深圳市中资源科技发展有限公司 | Environmental noise suppression circuit applied to mobile phones |
| CN102223428A (en) * | 2011-06-24 | 2011-10-19 | 中兴通讯股份有限公司 | Noise reducing method and mobile terminal |
| CN202634684U (en) * | 2012-02-20 | 2012-12-26 | 浙江商业职业技术学院 | Frequency modulator having noise suppression circuit |
| CN103796136A (en) * | 2012-10-30 | 2014-05-14 | 广州三星通信技术研究有限公司 | Equipment and method for ensuring output loudness and tone quality of different sound effect modes |
-
2016
- 2016-08-19 CN CN201610695831.4A patent/CN106331257B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201657063U (en) * | 2010-05-19 | 2010-11-24 | 深圳市中资源科技发展有限公司 | Environmental noise suppression circuit applied to mobile phones |
| CN102223428A (en) * | 2011-06-24 | 2011-10-19 | 中兴通讯股份有限公司 | Noise reducing method and mobile terminal |
| CN202634684U (en) * | 2012-02-20 | 2012-12-26 | 浙江商业职业技术学院 | Frequency modulator having noise suppression circuit |
| CN103796136A (en) * | 2012-10-30 | 2014-05-14 | 广州三星通信技术研究有限公司 | Equipment and method for ensuring output loudness and tone quality of different sound effect modes |
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