CN205051857U - Flying device , shooting device and device of making an uproar falls in recording thereof - Google Patents
Flying device , shooting device and device of making an uproar falls in recording thereof Download PDFInfo
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- CN205051857U CN205051857U CN201520795351.6U CN201520795351U CN205051857U CN 205051857 U CN205051857 U CN 205051857U CN 201520795351 U CN201520795351 U CN 201520795351U CN 205051857 U CN205051857 U CN 205051857U
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- 230000005236 sound signal Effects 0.000 claims abstract description 76
- 238000001914 filtration Methods 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims description 22
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 230000007613 environmental effect Effects 0.000 claims description 8
- 230000001960 triggered effect Effects 0.000 claims description 6
- 230000003595 spectral effect Effects 0.000 claims description 4
- 238000001228 spectrum Methods 0.000 claims description 4
- 230000004044 response Effects 0.000 claims description 3
- 239000011159 matrix material Substances 0.000 description 5
- RZVHIXYEVGDQDX-UHFFFAOYSA-N 9,10-anthraquinone Chemical compound C1=CC=C2C(=O)C3=CC=CC=C3C(=O)C2=C1 RZVHIXYEVGDQDX-UHFFFAOYSA-N 0.000 description 2
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Abstract
The utility model provides the device of making an uproar falls in a recording for the audio signal who records the recording device carries out real -time noise reduction. The recording is fallen the device of making an uproar and is included audio frequency processing apparatus, audio frequency processing apparatus with the recording device is connected, is used for receiving the audio signal that the recording device was recorded, and it is right the specific noise signal who contains among the audio signal carries out real -time filtering to be handled. The utility model discloses still relate to an use the recording is fallen the flying device of the device of making an uproar and is shot the device. The utility model discloses a recording is fallen the device of making an uproar and can be fallen in real time the specific noise signal who contains among the audio signal who records and make an uproar, and the software and hardware complexity is low, realize simple, low cost.
Description
Technical field
The utility model relates to audio signal processing technique field, particularly a kind of flight instruments, filming apparatus and recording denoising device thereof.
Background technology
Unmanned aerial photography aircraft has small and exquisite structure, and landing is convenient, and has outstanding handling and stable performance, thus can take accurate high-quality picture, for video display creation provides scheme of taking photo by plane safer, convenient, fast, at a low price.But, unmanned aerial photography aircraft includes the mechanical parts such as horizontal stage electric machine, screw, radiator fan usually, when The Cloud Terrace camera works, the sound that the synchronization equipment of airborne video is recorded to includes the noise that larger wind is made an uproar and the mechanical part such as motor, screw, radiator fan sends.It is software post-processed that the recording noise reduction schemes for specific noise common at present comprises two kinds: one, this mode can reach good noise reduction, but can not process in real time recording, need to do extra work for the treatment of, this protocols call user has certain audio processing software use experience simultaneously, operates comparatively loaded down with trivial details.Two is adopt digital signal processor (DigitalSignalProcessor, be called for short DSP) etc. high-speed treating apparatus process the voice data be recorded in real time, be reduced the voice data after noise, but this scheme needs extra hardware supports, software and hardware complexity is higher, and cost is high.
Utility model content
In view of this, be necessary to propose a kind of flight instruments, filming apparatus and recording denoising device thereof, to solve the problem.
A kind of recording denoising device, carry out real-time noise-reducing process for the audio signal recorded recording device, described recording denoising device comprises:
Apparatus for processing audio, is connected with described recording device, and described apparatus for processing audio receives the audio signal that described recording device is recorded, and carries out Real-Time Filtering process to the particular noise signals comprised in described audio signal.
Further, described recording denoising device also comprises microprocessor, described microprocessor is connected with described apparatus for processing audio, and when described recording device is triggered according to predetermined reduction or the filter parameter eliminated needed for described particular noise signals, carry out pre-configured to described apparatus for processing audio; And
Described apparatus for processing audio comprises multiple filter, described apparatus for processing audio responds the pre-configured of described microprocessor and triggers corresponding filter to described audio signal and carries out Real-Time Filtering process, to reduce or to eliminate the amplitude of the particular noise signals frequency range comprised in described audio signal, thus obtain the audio signal after noise reduction.
Further, described apparatus for processing audio also comprises analog to digital converter, and described analog to digital converter carries out analog-to-digital conversion to the audio signal that described apparatus for processing audio receives, and obtains corresponding audio pulse code modulation signal.
Further, the audio signal after described noise reduction is audio pulse code modulation signal.
Further, described microprocessor is also for predefined reduction or the filter parameter eliminated needed for described particular noise signals.
Further, described microprocessor in predefined reduction or when eliminating needed for described particular noise signals filter parameter, specifically for:
Initial configuration is carried out to described apparatus for processing audio, closes with all filters that described apparatus for processing audio is comprised;
Receive the original audio signal that described recording device is prerecorded; And
In a frequency domain described original audio signal is analyzed, and determine described particular noise signals and described filter parameter according to analysis result.
Further, described apparatus for processing audio also comprises analog to digital converter, described analog to digital converter carries out analog-to-digital conversion to described original audio signal, obtains corresponding original audio pulse code modulation signal, and described original audio pulse code modulation signal is sent to described microprocessor.
Further, described microprocessor, by analyzing the Hanning window frequency spectrum of described original audio pulse code modulation signal, is determined the spectral range that described particular noise signals is corresponding and size, and is calculated corresponding filter parameter.
Further, described filter parameter is pre-stored within storage device by described microprocessor, and obtains described filter parameter when described recording device is triggered and carry out pre-configured to described apparatus for processing audio.
Further, described microprocessor by I2C(Inter-IntegratedCircuit, inter-integrated circuit) bus is configured described apparatus for processing audio.
Further, described microprocessor is by I2S(Inter-ICSound) bus receive described apparatus for processing audio send audio pulse code modulation signal.
Further, described microprocessor exports the audio signal after noise reduction by USB interface.
Further, described multiple filter at least comprises: IIR(InfiniteImpulseResponse, endless impulse response) filter and biquadratic filter.
A kind of flight instruments, comprising:
Aircraft, for flight to target area;
Control end, gives described aircraft for sending controling instruction;
Recording device, carry on described aircraft and/or described control end, and in described target area recording audio signal; And
Recording denoising device as above, the apparatus for processing audio carry of described recording denoising device is on described aircraft or described control end, and be connected with described recording device, described recording denoising device carries out real-time noise-reducing process to the audio signal that described recording device is recorded to.
Further, described flight instruments also comprises load, described load carry on described aircraft, and for perform described control end send request.
Further, described flight instruments also comprises controller, described controller receives the control signal from described control end and synchronously triggers or cut out described load and described recording device, realizes the real-time synchronization of the audio signal that the file of described load record and described recording device are recorded.
Further, described recording device is MEMS microphone.
Further, the particular noise signals comprised in described audio signal comprises following at least one: the noise that motor, screw or radiator fan send, wind are made an uproar or environmental noise.
Further, the microprocessor of described recording denoising device is connected to the apparatus for processing audio of described recording denoising device by wired or wireless mode.
Further, described aircraft is unmanned aerial photography aircraft.
A kind of filming apparatus, comprising:
Filming apparatus body;
Recording device, carry is on described filming apparatus body, and recording audio signal; And
Recording denoising device as above, the apparatus for processing audio carry of described recording denoising device is on described filming apparatus body, and be connected with described recording device, described recording denoising device carries out real-time noise-reducing process to the audio signal that described recording device is recorded to.
Further, described filming apparatus also comprises load, and described load carry is on described filming apparatus body, and capture video file.
Further, described filming apparatus also comprises controller, described controller receives the control signal from described control end and synchronously triggers or cut out described load and described recording device, realizes the real-time synchronization of the audio signal that the file of described load record and described recording device are recorded.
Further, described recording device is MEMS microphone.
Further, the particular noise signals comprised in described audio signal comprises following at least one: the noise that motor sends and wind are made an uproar or environmental noise.
Further, the microprocessor of described recording denoising device is connected to the apparatus for processing audio of described recording denoising device by wired or wireless mode.
Further, described filming apparatus body is hand-held filming apparatus.
Further, described filming apparatus body is handle The Cloud Terrace, hand-held The Cloud Terrace or auto heterodyne equipment.
Recording denoising device of the present utility model can carry out real-time noise-reducing to the particular noise signals comprised in the audio signal be recorded to, and software and hardware complexity is low, realizes simple, with low cost.
Accompanying drawing explanation
Fig. 1 is the structural representation of the recording denoising device in the utility model one embodiment, and described recording denoising device comprises apparatus for processing audio and microprocessor.
Fig. 2 is that the microprocessor of the recording denoising device of Fig. 1 utilizes filter parameter to be configured the schematic diagram of the audio signal after obtaining noise reduction to apparatus for processing audio.
Fig. 3 is that the microprocessor of the recording denoising device of Fig. 1 carries out initial configuration to determine the schematic diagram of filter parameter to apparatus for processing audio.
Fig. 4 is the structural representation of the flight instruments in the utility model one embodiment, and described flight instruments comprises the recording denoising device of aircraft and Fig. 1.
Fig. 5 is the structural representation of the aircraft of Fig. 4.
Fig. 6 is the structural representation of the filming apparatus in the utility model one embodiment, and described filming apparatus comprises the recording denoising device of Fig. 1.
Fig. 7 is the schematic flow sheet of a kind of noise-reduction method of recording in the utility model one embodiment.
Main element symbol description
| Recording denoising device | 100 |
| Apparatus for processing audio | 11 |
| Matrix | 110 |
| Analog to digital converter | 111 |
| Iir filter | 112 |
| Biquadratic filter | 113 |
| Microprocessor | 12 |
| Flight instruments | 200 |
| Aircraft | 21 |
| Controller | 211 |
| Power Component | 212 |
| Radiator fan | 213 |
| Control end | 22 |
| Filming apparatus | 300 |
| Filming apparatus body | 31 |
| Controller | 311 |
| Power Component | 312 |
| Control end | 32 |
| Load | 40 |
| Recording device | 50 |
| Storage device | 60 |
| Step | 701-702 |
Following embodiment will further illustrate the utility model in conjunction with above-mentioned accompanying drawing.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Referring to Fig. 1, is the structural representation of a kind of denoising device 100 of recording of the utility model embodiment.Described recording denoising device 100 for recording device 50(as Fig. 4, shown in 6) audio signal recorded carries out real-time noise-reducing process.In the present embodiment, described recording denoising device 100 at least comprises apparatus for processing audio 11 and microprocessor 12.In the present embodiment, described apparatus for processing audio 11 is connected with described recording device 50.The audio signal that described apparatus for processing audio 11 is recorded for receiving described recording device 50, and Real-Time Filtering process is carried out to the particular noise signals comprised in described audio signal, to reduce or to eliminate the amplitude of the particular noise signals frequency range comprised in described audio signal, thus obtain the audio signal after noise reduction.
Please refer to Fig. 2, in the present embodiment, described apparatus for processing audio 11 at least comprises multiple filter.Wherein, described multiple filter includes but not limited to, IIR(InfiniteImpulseResponse, endless impulse response) filter 112, two second order (Biquad) filter 113.Because described biquadratic filter 113 is integrated with the characteristic of such as high pass filter, low pass filter, frequency equilibrium filter, notch filter etc., utilize the combination of these filters to achieve reduction to noise frequency range, reach the object reducing described particular noise signals in real time.
In the present embodiment, described apparatus for processing audio 11 at least also comprises analog to digital converter 111, described analog to digital converter 111 carries out analog-to-digital conversion to the audio signal that described apparatus for processing audio 11 receives, and obtain corresponding audio pulse code modulation (PulseCodeModulation), be called for short PCM signal.
Described apparatus for processing audio 11 also comprises matrix 110, for arranging each components and parts.Described matrix 110 can be circuit board.In present embodiment, wherein, described analog to digital converter 111, iir filter 112 and biquadratic filter 113 are all arranged on described matrix 110.
Be appreciated that described apparatus for processing audio 11 also can omit described matrix 110, and by each components and parts described, as analog to digital converter 111, iir filter 112 and second order filter 113 are connected by wireless or restricted manner.
In the present embodiment, described microprocessor 12 is connected with described apparatus for processing audio 11.Due to particular noise signals frequency distribution within the specific limits, for the frequency range that the audio signal be recorded to is corresponding to particular noise signals carry out weaken can obtain the audio signal after noise reduction.In the present embodiment, described microprocessor 12 pre-determines the filter parameter reducing or eliminate needed for described particular noise signals.In the present embodiment, described filter parameter at least comprises filter kind, number and each filter coefficient.
Particularly, as shown in Figure 3, described microprocessor 12 first carries out initial configuration to described apparatus for processing audio 11, closes with all filters comprised by described apparatus for processing audio 11.The analog to digital converter 111 of described apparatus for processing audio 11 receives original audio signal that described recording device 50 prerecords and carries out analog-to-digital conversion, obtain corresponding original audio pulse code modulation signal, and described original audio pulse code modulation signal is sent to described microprocessor 12.Described microprocessor 12 is analyzed described original audio pulse code modulation signal in a frequency domain, and determines described particular noise signals and described filter parameter according to analysis result.
In the present embodiment, the Chinese peaceful (Hanning) window frequency spectrum of described microprocessor 12 by analyzing described original audio pulse code modulation signal, determine described particular noise signals and spectral range corresponding to described particular noise signals and size, and calculate corresponding filter parameter.
In the present embodiment, described filter parameter is also pre-stored within storage device 60(as shown in Fig. 4,6 by described microprocessor 12) in.
Please again consult Fig. 2, described microprocessor 12 is also when described recording device 50 is triggered, the filter parameter obtaining predetermined reduction or eliminate needed for described particular noise signals from described storage device 60, and carry out pre-configured according to described filter parameter to described apparatus for processing audio 11.
In the present embodiment, described apparatus for processing audio 11 responds the pre-configured of described microprocessor 12 and triggers corresponding filter to described audio signal and carries out Real-Time Filtering process, to reduce or to eliminate the amplitude of the particular noise signals frequency range comprised in described audio signal, thus obtain the audio signal after noise reduction.In the present embodiment, the audio signal after described noise reduction is audio pulse code modulation signal.
In the present embodiment, as shown in Figure 2,3, described microprocessor 12 passes through I2C(Inter-IntegratedCircuit, inter-integrated circuit) bus is configured described apparatus for processing audio 11, by I2S(Inter-ICSound) bus receives the audio pulse code modulation signal that described apparatus for processing audio 11 sends, and exports the audio signal after noise reduction by USB interface.
Referring to Fig. 4, is the structural representation of a kind of flight instruments 200 of the utility model embodiment.Described flight instruments 200 comprises aircraft 21, the control end 22 of described aircraft 21, load 40, recording device 50 and recording denoising device 100.
Please refer to Fig. 5, it is the structural representation of a kind of aircraft 21 of the utility model embodiment.In the present embodiment, described aircraft 21 can be the aircraft comprising one or more screw, the helicopter, quadrotor, six rotorcraft etc. of such as single screw, described aircraft 21 can fly to target area automatically according to pre-configured course data, the flight control data that the control appliance that also can receive the band radio functions such as such as remote controller, smart mobile phone, panel computer, intelligent wearable device sends in ground surface end, and carry out flying to target area based on these flight control data.In the present embodiment, described aircraft 21 is unmanned aerial photography aircraft.
In the present embodiment, described aircraft 21 has load carry ability, can the external device (ED) of carry constant weight, such as The Cloud Terrace (not shown), load 40, recording device 50 etc.The request that described load 40 sends for performing described control end 22, such as, at described target area log file, specifically comprises capture video file, picture or record as files such as earth's surface reconnaissance image.Described recording device 50 at described target area recording audio signal, such as, the synchronization when described load 40 works of described recording device 50.In the present embodiment, described recording device 50 is MEMS(MicroElectromechanicalSystem, Micro Electro Mechanical System) microphone.
In the present embodiment, the controller 211 of described aircraft 21 receives the control signal from described control end 22 and synchronously triggers or cut out described load 40 and described recording device 50, realizes the real-time synchronization of the audio signal that the file of described load 40 record and described recording device 50 are recorded.
Because aircraft 21 also includes Power Component 212 usually; such as horizontal stage electric machine (not shown), screw (not shown), screw motor (not shown); and radiator fan 213(figure do not show) etc. mechanical part; in the flight course of described aircraft 21; these mechanical parts can produce stronger sound, usually include the noise that larger wind is made an uproar, the mechanical part such as environmental noise and motor, screw, radiator fan 213 sends in the audio signal causing aerial synchronization device 50 to be recorded to.In the present embodiment, the noise that the mechanical parts such as described particular noise signals includes but not limited to, motor, screw or radiator fan 213 send, wind are made an uproar or environmental noise.These specific noise informational needs are lowered or eliminate.
In the present embodiment, described recording denoising device 100 carries out real-time noise-reducing process for the audio signal be recorded to the described recording device 50 of carry on described aircraft 21.In the present embodiment, described apparatus for processing audio 11 carry on described aircraft 21, and is connected with described recording device 50.In other embodiments, described apparatus for processing audio 11 is arranged on ground surface end, and is wirelessly connected to described recording device 50.
In one embodiment, described microprocessor 12 is arranged on described aircraft 21, and is connected to described apparatus for processing audio 11 by wired mode.In described a kind of execution mode, described microprocessor 12 can independent of the controller 211 of described aircraft 21, or described microprocessor 12 accessible site is in the controller 211 of described aircraft 21.In another embodiment, described microprocessor 12 is arranged on ground surface end, and is wirelessly connected to described apparatus for processing audio 11.Described storage device 60 can be configured in described aircraft 21, also can be an independent memory be connected with described microprocessor 12.
Be appreciated that and also described recording device 50 also can be arranged at described control end 22, for audio files such as the dubbing of record controls end 22, explanations.Denoising device 100 of now recording can be installed on control end 22 or aircraft 21, and the microprocessor 12 of described recording denoising device 100 is connected by wired or wireless mode with apparatus for processing audio 11.The number of described recording device 50 can be one, also can be multiple.When for time multiple, can partly be arranged on aircraft 21, part is arranged on control end 22; Also all can be arranged on aircraft 21 or all be arranged at control end 22.
Being appreciated that described load 40 can be filming apparatus, as camera, video camera etc., also can be the detection instruments such as earth's surface surveying device.
Referring to Fig. 6, is the structural representation of a kind of filming apparatus 300 of the utility model embodiment.Described filming apparatus 300 comprises filming apparatus body 31, the control end 32 of described filming apparatus body 31, described load 40, described recording device 50 and described recording denoising device 100.
In the present embodiment, described filming apparatus body 31 is hand-held filming apparatus, such as handle The Cloud Terrace, hand-held The Cloud Terrace or auto heterodyne equipment.
In the present embodiment, described filming apparatus body 31 has load carry ability, can the external device (ED) of carry constant weight, such as load 40, recording device 50 etc.The request that described load 40 sends for performing described control end 32, such as log file, specifically comprises capture video file, picture or record as files such as earth's surface reconnaissance image.Described recording device 50 is for the synchronous recording audio signal when described load 40 works.
In the present embodiment, the controller 311 of described filming apparatus 300 receives the control signal from described control end 32 and synchronously triggers or cut out described load 40 and described recording device 50, realize the file of described load 40 record, such as video file or photo etc., the real-time synchronization of the audio signal recorded with described recording device 50.
Because described filming apparatus body 31 also includes Power Component 312 usually; the mechanical parts such as such as horizontal stage electric machine (not shown); in the course of work of described filming apparatus body 31; these mechanical parts can produce stronger sound, usually include the noise that larger wind is made an uproar, the mechanical part such as environmental noise and motor sends in the audio signal causing aerial synchronization device 50 to be recorded to.In the present embodiment, described particular noise signals includes but not limited to, the noise that the mechanical parts such as motor send, wind are made an uproar or environmental noise.These specific noise informational needs are lowered or eliminate.
In the present embodiment, described recording denoising device 100 carries out real-time noise-reducing process for the audio signal be recorded to the described recording device 50 of carry on described filming apparatus body 31.In the present embodiment, described apparatus for processing audio 11 carry on described filming apparatus body 31, and is connected with described recording device 50.In other embodiments, described apparatus for processing audio 11 is arranged on ground surface end, and is wirelessly connected to described recording device 50.
In one embodiment, described microprocessor 12 is arranged on described filming apparatus body 31, and is wiredly connected to described apparatus for processing audio 11.In described a kind of execution mode, described microprocessor 12 can independent of the controller 311 of described filming apparatus body 31, or described microprocessor 12 accessible site is in the controller 311 of described filming apparatus body 31.In another embodiment, described microprocessor 12 is arranged on ground surface end, and is wirelessly connected to described apparatus for processing audio 11.Described storage device 60 can be configured in described filming apparatus body 31, also can be an independent memory be connected with described microprocessor 12.
Be appreciated that and also described recording device 50 also can be arranged at described control end 32, for audio files such as the dubbing of record controls end 32, explanations.Denoising device 100 of now recording can be installed on control end 32, and the microprocessor 12 of described recording denoising device 100 is connected by wired or wireless mode with apparatus for processing audio 11.
Being appreciated that described load 40 can be camera, video camera etc., also can be the detection instruments such as earth's surface surveying device.
Fig. 7 is the one recording noise-reduction method flow chart in the utility model embodiment.In the present embodiment, described recording noise-reduction method comprises the steps:
Step 701, when described recording device 50 is triggered, described microprocessor 12 carries out pre-configured according to predetermined reduction or the filter parameter eliminated needed for described particular noise signals to described apparatus for processing audio 11.
In the present embodiment, described apparatus for processing audio 11 is carried out pre-configured before, described microprocessor 12 also pre-determines and reduces or the filter parameter eliminated needed for described particular noise signals.In the present embodiment, described filter parameter at least comprises filter kind, number and each filter coefficient.
Particularly, described microprocessor 12 first carries out initial configuration to described apparatus for processing audio 11, closes with all filters comprised by described apparatus for processing audio 11.The analog to digital converter 111 of described apparatus for processing audio 11 receives original audio signal that described recording device 50 prerecords and carries out analog-to-digital conversion, obtain corresponding original audio pulse code modulation signal, and described original audio pulse code modulation signal is sent to described microprocessor 12.Described microprocessor 12 is analyzed described original audio pulse code modulation signal in a frequency domain, and determines described particular noise signals and described filter parameter according to analysis result.
In the present embodiment, the Chinese peaceful (Hanning) window frequency spectrum of described microprocessor 12 by analyzing described original audio pulse code modulation signal, determine described particular noise signals and spectral range corresponding to described particular noise signals and size, and calculate corresponding filter parameter.
Step 702, described apparatus for processing audio 11 responds described pre-configured and trigger corresponding filter to described audio signal and carry out Real-Time Filtering process, to reduce or to eliminate the amplitude of the particular noise signals frequency range comprised in described audio signal, thus obtain the audio signal after noise reduction.
In the present embodiment, described analog to digital converter 111 carries out analog-to-digital conversion to the audio signal that described apparatus for processing audio 11 receives, and obtains corresponding audio pulse code modulation signal.Audio signal after described noise reduction is audio pulse code modulation signal.
Recording denoising device 100 of the present utility model can carry out real-time noise-reducing to the particular noise signals comprised in the audio signal be recorded to, and software and hardware complexity is low, realizes simple, with low cost.
Finally it should be noted that, above embodiment is only in order to illustrate the technical solution of the utility model and unrestricted, although be described in detail the utility model with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify to the technical solution of the utility model or equivalent replacement, and not depart from the spirit and scope of technical solutions of the utility model.
Claims (28)
1. a recording denoising device, carry out real-time noise-reducing process for the audio signal recorded recording device, it is characterized in that, described recording denoising device comprises:
Apparatus for processing audio, is connected with described recording device, and described apparatus for processing audio receives the audio signal that described recording device is recorded, and carries out Real-Time Filtering process to the particular noise signals comprised in described audio signal.
2. to record as claimed in claim 1 denoising device, it is characterized in that, also comprise microprocessor, described microprocessor is connected with described apparatus for processing audio, and when described recording device is triggered according to predetermined reduction or the filter parameter eliminated needed for described particular noise signals, carry out pre-configured to described apparatus for processing audio; And
Described apparatus for processing audio comprises multiple filter, described apparatus for processing audio responds the pre-configured of described microprocessor and triggers corresponding filter to described audio signal and carries out Real-Time Filtering process, to reduce or to eliminate the amplitude of the particular noise signals frequency range comprised in described audio signal, thus obtain the audio signal after noise reduction.
3. to record as claimed in claim 2 denoising device, it is characterized in that, described apparatus for processing audio also comprises analog to digital converter, and described analog to digital converter carries out analog-to-digital conversion to the audio signal that described apparatus for processing audio receives, and obtains corresponding audio pulse code modulation signal.
4. record as claimed in claim 3 denoising device, it is characterized in that, the audio signal after described noise reduction is audio pulse code modulation signal.
5. to record as claimed in claim 2 denoising device, it is characterized in that, described microprocessor is also for predefined reduction or the filter parameter eliminated needed for described particular noise signals.
6. to record as claimed in claim 5 denoising device, it is characterized in that, described microprocessor in predefined reduction or when eliminating needed for described particular noise signals filter parameter, specifically for:
Initial configuration is carried out to described apparatus for processing audio, closes with all filters that described apparatus for processing audio is comprised;
Receive the original audio signal that described recording device is prerecorded; And
In a frequency domain described original audio signal is analyzed, and determine described particular noise signals and described filter parameter according to analysis result.
7. to record as claimed in claim 6 denoising device, it is characterized in that, described apparatus for processing audio also comprises analog to digital converter, described analog to digital converter carries out analog-to-digital conversion to described original audio signal, obtain corresponding original audio pulse code modulation signal, and described original audio pulse code modulation signal is sent to described microprocessor.
8. to record as claimed in claim 7 denoising device, it is characterized in that, described microprocessor, by analyzing the Hanning window frequency spectrum of described original audio pulse code modulation signal, is determined the spectral range that described particular noise signals is corresponding and size, and is calculated corresponding filter parameter.
9. to record as claimed in claim 5 denoising device, it is characterized in that, described filter parameter is pre-stored within storage device by described microprocessor, and obtains described filter parameter when described recording device is triggered and carry out pre-configured to described apparatus for processing audio.
10. to record as claimed in claim 6 denoising device, it is characterized in that, described microprocessor by I2C(Inter-IntegratedCircuit, inter-integrated circuit) bus is configured described apparatus for processing audio.
11. record denoising device as claimed in claim 7, and it is characterized in that, described microprocessor is by I2S(Inter-ICSound) bus receives the audio pulse code modulation signal that described apparatus for processing audio sends.
12. record denoising device as claimed in claim 2, it is characterized in that, described microprocessor exports the audio signal after noise reduction by USB interface.
13. record denoising device as claimed in claim 2, and it is characterized in that, described multiple filter at least comprises: IIR(InfiniteImpulseResponse, endless impulse response) filter and biquadratic filter.
14. 1 kinds of flight instrumentses, is characterized in that, comprising:
Aircraft, for flight to target area;
Control end, gives described aircraft for sending controling instruction;
Recording device, carry on described aircraft and/or described control end, and in described target area recording audio signal; And
Recording denoising device as described in claim 1-13 any one, the apparatus for processing audio carry of described recording denoising device is on described aircraft or described control end, and be connected with described recording device, described recording denoising device carries out real-time noise-reducing process to the audio signal that described recording device is recorded to.
15. flight instrumentses as claimed in claim 14, is characterized in that, also comprise load, described load carry on described aircraft, and for perform described control end send request.
16. flight instrumentses as claimed in claim 15, it is characterized in that, also comprise controller, described controller receives the control signal from described control end and synchronously triggers or cut out described load and described recording device, realizes the real-time synchronization of the audio signal that the file of described load record and described recording device are recorded.
17. flight instrumentses as claimed in claim 14, it is characterized in that, described recording device is MEMS microphone.
18. flight instrumentses as claimed in claim 14, it is characterized in that, the particular noise signals comprised in described audio signal comprises following at least one: the noise that motor, screw or radiator fan send, wind are made an uproar or environmental noise.
19. flight instrumentses as claimed in claim 14, is characterized in that, the microprocessor of described recording denoising device is connected to the apparatus for processing audio of described recording denoising device by wired or wireless mode.
20. flight instrumentses as claimed in claim 14, it is characterized in that, described aircraft is unmanned aerial photography aircraft.
21. 1 kinds of filming apparatus, is characterized in that, comprising:
Filming apparatus body;
Recording device, carry is on described filming apparatus body, and recording audio signal; And
Recording denoising device as described in claim 1-13 any one, the apparatus for processing audio carry of described recording denoising device is on described filming apparatus body, and be connected with described recording device, described recording denoising device carries out real-time noise-reducing process to the audio signal that described recording device is recorded to.
22. filming apparatus as claimed in claim 21, it is characterized in that, also comprise load, described load carry is on described filming apparatus body, and capture video file.
23. filming apparatus as claimed in claim 22, it is characterized in that, also comprise controller, described controller receives the control signal from described control end and synchronously triggers or cut out described load and described recording device, realizes the real-time synchronization of the audio signal that the file of described load record and described recording device are recorded.
24. filming apparatus as claimed in claim 21, it is characterized in that, described recording device is MEMS microphone.
25. filming apparatus as claimed in claim 21, it is characterized in that, the particular noise signals comprised in described audio signal comprises following at least one: the noise that motor sends and wind are made an uproar or environmental noise.
26. filming apparatus as claimed in claim 21, is characterized in that, the microprocessor of described recording denoising device is connected to the apparatus for processing audio of described recording denoising device by wired or wireless mode.
27. filming apparatus as claimed in claim 21, it is characterized in that, described filming apparatus body is hand-held filming apparatus.
28. filming apparatus as claimed in claim 27, is characterized in that, described filming apparatus body is handle The Cloud Terrace, hand-held The Cloud Terrace or auto heterodyne equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105228054A (en) * | 2015-10-15 | 2016-01-06 | 深圳市大疆创新科技有限公司 | Flight instruments, filming apparatus and recording denoising device thereof and method |
| CN106210583A (en) * | 2016-08-01 | 2016-12-07 | 苏州倍声声学技术有限公司 | A kind of unmanned plane recording system |
| CN106341755A (en) * | 2016-08-03 | 2017-01-18 | 厦门傅里叶电子有限公司 | Method for improving sound recording quality of unmanned aerial vehicle |
| CN106527478A (en) * | 2016-11-24 | 2017-03-22 | 深圳市道通智能航空技术有限公司 | Unmanned aerial vehicle (UAV) field sound acquisition method, audio video realization method and related device |
| WO2021056426A1 (en) * | 2019-09-27 | 2021-04-01 | 深圳市大疆创新科技有限公司 | Sound collection method, sound collection structure, and unmanned aerial vehicle |
| CN112955953A (en) * | 2020-06-05 | 2021-06-11 | 深圳市大疆创新科技有限公司 | Method for eliminating noise of handheld cloud deck, handheld cloud deck and storage medium |
| CN113748688A (en) * | 2020-06-10 | 2021-12-03 | 深圳市大疆创新科技有限公司 | Recording method, device and chip for unmanned aerial vehicle, unmanned aerial vehicle and system |
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2015
- 2015-10-15 CN CN201520795351.6U patent/CN205051857U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105228054A (en) * | 2015-10-15 | 2016-01-06 | 深圳市大疆创新科技有限公司 | Flight instruments, filming apparatus and recording denoising device thereof and method |
| CN106210583A (en) * | 2016-08-01 | 2016-12-07 | 苏州倍声声学技术有限公司 | A kind of unmanned plane recording system |
| CN106341755A (en) * | 2016-08-03 | 2017-01-18 | 厦门傅里叶电子有限公司 | Method for improving sound recording quality of unmanned aerial vehicle |
| CN106527478A (en) * | 2016-11-24 | 2017-03-22 | 深圳市道通智能航空技术有限公司 | Unmanned aerial vehicle (UAV) field sound acquisition method, audio video realization method and related device |
| WO2021056426A1 (en) * | 2019-09-27 | 2021-04-01 | 深圳市大疆创新科技有限公司 | Sound collection method, sound collection structure, and unmanned aerial vehicle |
| CN112955953A (en) * | 2020-06-05 | 2021-06-11 | 深圳市大疆创新科技有限公司 | Method for eliminating noise of handheld cloud deck, handheld cloud deck and storage medium |
| CN113748688A (en) * | 2020-06-10 | 2021-12-03 | 深圳市大疆创新科技有限公司 | Recording method, device and chip for unmanned aerial vehicle, unmanned aerial vehicle and system |
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