CN201323620Y - Movable network camera and noise eliminating circuit thereof - Google Patents
Movable network camera and noise eliminating circuit thereof Download PDFInfo
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- CN201323620Y CN201323620Y CNU200820182409XU CN200820182409U CN201323620Y CN 201323620 Y CN201323620 Y CN 201323620Y CN U200820182409X U CNU200820182409X U CN U200820182409XU CN 200820182409 U CN200820182409 U CN 200820182409U CN 201323620 Y CN201323620 Y CN 201323620Y
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- sensing module
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- network camera
- signal
- movable network
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Abstract
The utility model relates to a movable network camera and noise eliminating circuit thereof, which comprises an external sound sensing module which is arranged on the movable network camera used for receiving external environmental sound signals comprising vibration noise signals, an internal sound sensing module which is arranged in the movable network camera used for receiving the vibration noise signals generated during diving rotation of a motor, a noise eliminating module used for receiving the external environmental sound signals which are output by the external sound sensing module and contain the vibration noise signals and the vibration noise signals output by the internal sound sensing module, and the comparing calculation is carried out to eliminate the vibration noise signals and the external environmental sound signals are output.
Description
Technical field
The utility model relates to a kind of noise suicide circuit, particularly a kind of movable network camera and noise suicide circuit thereof.
Background technology
Along with computer research and development manufacturing technology constantly progresses greatly; the arithmetic speed of mobile computer and usefulness also obtain significantly to promote; external except that be installed on one in conjunction with loudspeaker, bluetooth, CD-ROM drive, CD writer, modulator-demodulator and calculating punch etc.; more be provided with built-in network camera machine module so that real-time video uses; in addition; adjacent position in network camera module can be offered perforate usually, and mini microphone is installed, for user's use of conversing in real time.
In order to allow the built-in network camera machine can adjust the photography visual angle, at present existing design (please refer to TaiWan, China patent announcement number I290669 number) can allow network camera be flipped an angle to drive camera lens by motor driven, reach the purpose of adjusting the photography visual angle, yet because when the camera lens of motor driven network camera rotates, be arranged at the other microphone of network camera and can receive the vibrating noise that motor produces, so will cause speech quality to reduce.
Please refer to the TaiWan, China patent announcement No. 535967, this novel patent discloses the mobile phone communication noise absorber in a kind of car, comprise a sensing module that is installed in a noise source side of this vehicle, one with electrical in succession the analog/digital signal conversion device of this sensing module, one digital signal processor that electrically connects with this analog/digital converter, the one digital/analog signal transducer that electrically connects with this digital signal processor, an and audio producing unit that electrically connects with this digital/analog signal transducer, after this audio producing unit receives the analogue audio frequency processing signals that this digital/analog signal transducer transmitted, can send out one equates with the noise level of this noise source, the audio frequency that phase place is opposite, for this reason, but the noise that utilizes this this noise source of audio frequency interference eliminated to be sent, the radio reception quality of this mobile phone when improving communication.
Though can improving, listens to and the radio reception quality above-mentioned noise suicide circuit, but its employed digital operation device, compensating circuit or digital signal processor, analog/digital converter and digital/analog converter are the not low circuit unit of price, so the cost of noise suicide circuit will be risen.
Therefore how to provide a kind of movable cheaply network camera and noise suicide circuit thereof,, become one of researcher's problem to be solved to promote the speech quality of movable network camera.
The utility model content
In view of above problem, the utility model provides a kind of movable network camera and noise suicide circuit thereof, utilizes the internal sound sensing module to obtain the noise signal of shell vibrating, carries out noise eliminating again and handles, so that the vibrating noise signal is eliminated, to promote the speech quality of network camera.
Therefore, the noise suicide circuit of the disclosed movable network camera of the utility model, in order to eliminate movable network camera in the transmission course of carrying out voice signal, movable network camera is because of the action of motor driven rotation, the vibrating noise signal that in voice signal, is produced, its noise suicide circuit includes: the external voice sensing module, be arranged on the movable network camera, and include the external environmental sounds signal of vibrating noise signal in order to reception; The internal sound sensing module is arranged in the movable network camera, in order to receive the vibrating noise signal that produces when motor driven is rotated; And noise eliminating module, in order to receive the external environmental sounds signal that includes the vibrating noise signal of external voice sensing module output, and the vibrating noise signal of internal sound sensing module output, and carry out a comparison operation, to eliminate the vibrating noise signal and to export the external environmental sounds signal.
In addition, the disclosed movable network camera of the utility model, include: a housing, an external voice sensing module, an internal sound sensing module, a motor and a noise eliminating module, it is characterized in that, wherein the internal sound sensing module is to be closed among the housing to detect the sound of enclosure interior, one end and the internal sound sensing module of noise eliminating module join, and the other end of noise eliminating module then joins with the external voice sensing module.
By this movable network camera and noise suicide circuit thereof, be obtain external environment input respectively by at least two sound sensing modules voice signal (for example, voice) with the vibrating noise signal, utilize logical circuit that the vibrating noise signal is eliminated in the voice signal of external environment input again, so, by simple and easy and circuit framework cheaply, to eliminate the vibrating noise that produces by motor driven, to promote the speech quality of movable network camera.
Below in conjunction with the drawings and specific embodiments the utility model is described in detail, but not as to qualification of the present utility model.
Description of drawings
Fig. 1 is a circuit box schematic diagram of the present utility model;
Fig. 2 A and Fig. 2 B are the circuit diagram of the differential amplifier carried of the utility model.
Wherein, Reference numeral
10 external voice sensing modules
11 external environmental sounds signals
20 internal sound sensing modules
30 noise eliminating modules
40 motors
41 vibrating noise signals
50 movable network cameras
The Iss current source
The Q1 transistor
The Q2 transistor
The Q3 metal-oxide half field effect transistor
The Q4 metal-oxide half field effect transistor
R1 resistance
R2 resistance
R3 resistance
The V1 input
The V2 input
The Vo output
The VCC positive voltage source
The VEE negative voltage source
Embodiment
Below in conjunction with accompanying drawing structural principle of the present utility model and operation principle are done concrete description:
Please refer to Fig. 1, be circuit box schematic diagram of the present utility model.As shown in Figure 1, noise suicide circuit of the present utility model is in order to eliminate movable network camera 50 in the transmission course of carrying out voice signal, movable network camera 50 drives the action of rotation because of motor 40, the vibrating noise signal that is produced in voice signal, its noise suicide circuit include external voice sensing module 10, internal sound sensing module 20, noise eliminating module 30.
External voice sensing module 10 is arranged on the movable network camera 50.External voice sensing module 10 is mainly in order to (for example to receive external environmental sounds signal 11, voice), but when movable network camera 50 drove rotation because of motor 40, then external voice sensing module 10 can receive the external environmental sounds signal 11 that includes vibrating noise signal 41.External voice sensing module 10 can for example be Electret Condencer Microphone, dynamic microphones or silicon crystal microphone.
Internal sound sensing module 20 is arranged in the housing of movable network camera 50, and is enclosed in the housing.Internal sound sensing module 20 drives the vibrating noise signal 41 that self is produced when rotating in order to receive motor 40, and also includes shell vibrating sound in the vibrating noise signal 41.Because internal sound sensing module 20 is enclosed in the housing, therefore, when motor 40 drove rotation, housing can and then produce resonance, and internal sound sensing module 20 can be directly and intactly received motor vibration noise and shell vibrating sound.Internal sound sensing module 20 can for example be Electret Condencer Microphone, dynamic microphones or silicon crystal microphone, wherein the frequency response range of internal sound sensing module 20 can be selected or identical product approaching with the motor vibration frequency values, so that the rising of the sensing sensitivity of internal sound sensing module 20, and obtain true and the most complete vibrating noise signal 41.
In addition, movable network camera 50 of the present utility model (for example includes housing, the casing of mobile computer, and housing can be taken in external voice sensing module 10, internal sound sensing module 20, noise eliminating module 30, motor 40 and camera lens (not shown) or the shell structure described in TaiWan, China patent announcement number I290669 number).
Motor 40 has a driving shaft (not shown), and driving shaft is connected with an end of the camera lens of movable network camera 50, and can drive camera lens and turn to an angle position.Those skilled in the art also can be used to drive housing and carry out a displacement, so that carry out the displacement action or the rotational action of upper and lower, left and right.Camera lens is in order to provide the picked-up image.Wherein internal sound sensing module 20 is closed among the housing to detect the sound of enclosure interior.One end and the internal sound sensing module 20 of noise eliminating module 30 join, and the other end of noise eliminating module 30 then joins with external voice sensing module 10.
Please refer to Fig. 2 A, the circuit diagram for differential amplifier includes: resistance R 1, resistance R 2, resistance R 3, transistor Q1, transistor Q2 and current source Iss.
At first, external voice sensing module 10 is received the external environmental sounds signal 11 that includes vibrating noise signal 41 input to input V1, and input V1 is connected to the base stage of transistor Q1.
Next, internal sound sensing module 20 is received vibrating noise signal 41 input to input V2, and input V2 is connected to the base stage of transistor Q2, the collection utmost point of transistor Q1 is connected to an end of resistance R 1, and the other end of resistance R 1 is connected to positive voltage source VCC, the emitter-base bandgap grading of transistor Q1 is connected to the end of current source Iss, and the other end of current source Iss is connected to negative voltage source, resistance R 3 is connected in parallel with current source Iss, the collection utmost point of transistor Q2 is connected to an end of resistance R 2, and the other end of resistance R 2 is connected to positive voltage source VCC, and the emitter-base bandgap grading of transistor Q2 is connected to the end of current source Iss, and the other end of current source Iss is connected to negative voltage source.
Again after the comparison operation via differential amplifier, output end vo amplifies the external environmental sounds signal 11 that the vibrating noise signal has been eliminated in output, and output end vo is connected with movable network camera 50, to transmit external environmental sounds signal 11 to the computer terminal (not shown).
In addition, please refer to Fig. 2 B, the circuit diagram for another embodiment of differential amplifier of the present utility model is transistor Q1 and transistor Q2 are replaced into metal-oxide half field effect transistor Q3 and metal-oxide half field effect transistor Q4 with Fig. 2 A difference, remainder is identical, is not giving unnecessary details.
Comprehensive the above, movable network camera of the present utility model and noise suicide circuit thereof, the voice signal of obtaining external environment input respectively by at least two sound sensing modules (for example, voice) with the vibrating noise signal, utilize logical circuit that the vibrating noise signal is eliminated in the voice signal of external environment input again, so, by simple and easy and circuit framework cheaply, to eliminate the vibrating noise that produces by motor driven, to promote the speech quality of movable network camera.
Certainly; the utility model also can have other various embodiments; under the situation that does not deviate from the utility model spirit and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the utility model, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the utility model.
Claims (9)
1, a kind of noise suicide circuit of movable network camera, in order to eliminate a movable network camera in the transmission course of carrying out a voice signal, this movable network camera is because of the action of motor driven rotation, the vibrating noise signal that in this voice signal, is produced, it is characterized in that this noise suicide circuit includes:
One external voice sensing module is in order to receive an external environmental sounds signal;
One internal sound sensing module is in order to receive this vibrating noise signal that produces when motor driven is rotated; And
One noise eliminating module is in order to eliminate this vibrating noise signal and to export this external environmental sounds signal.
2, the noise suicide circuit of movable network camera according to claim 1 is characterized in that, also includes this vibrating noise signal in this external environmental sounds signal that this external voice sensing module is received.
3, the noise suicide circuit of movable network camera according to claim 2, it is characterized in that, this noise eliminating module receives this external environmental sounds signal that includes this vibrating noise signal of this external voice sensing module output, and this vibrating noise signal of this internal sound sensing module output, and carry out a comparison operation, to eliminate this vibrating noise signal and to export this external environmental sounds signal.
4, the noise suicide circuit of movable network camera according to claim 1 is characterized in that, this external voice sensing module and this internal sound sensing module are an Electret Condencer Microphone.
5, the noise suicide circuit of movable network camera according to claim 1 is characterized in that, this external voice sensing module and this internal sound sensing module are a silicon crystal microphone.
6, the noise suicide circuit of movable network camera according to claim 1 is characterized in that, this external voice sensing module and this internal sound sensing module are a dynamic microphones.
7, the noise suicide circuit of movable network camera according to claim 1 is characterized in that, this noise eliminating module includes a differential amplifier.
8, the noise suicide circuit of movable network camera according to claim 1 is characterized in that, this internal sound sensing module also receives the shell vibrating sound of this movable network camera.
9, a kind of movable network camera comprises:
One housing, one external voice sensing module, an internal sound sensing module, a motor and a noise eliminating module are wherein arranged, it is characterized in that, this internal sound sensing module is closed among this housing to detect the sound of enclosure interior, one end of this noise eliminating module and this internal sound sensing module join, and the other end of this noise eliminating module then joins with this external voice sensing module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820182409XU CN201323620Y (en) | 2008-12-23 | 2008-12-23 | Movable network camera and noise eliminating circuit thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820182409XU CN201323620Y (en) | 2008-12-23 | 2008-12-23 | Movable network camera and noise eliminating circuit thereof |
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| Publication Number | Publication Date |
|---|---|
| CN201323620Y true CN201323620Y (en) | 2009-10-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200820182409XU Expired - Fee Related CN201323620Y (en) | 2008-12-23 | 2008-12-23 | Movable network camera and noise eliminating circuit thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105025182A (en) * | 2015-06-11 | 2015-11-04 | 广东欧珀移动通信有限公司 | Noise reduction method and terminal |
| CN111314532A (en) * | 2020-02-17 | 2020-06-19 | Oppo广东移动通信有限公司 | Noise reduction method and device, electronic equipment and storage medium |
| CN111385709A (en) * | 2018-12-27 | 2020-07-07 | 鸿富锦精密电子(郑州)有限公司 | Electronic device and noise elimination method |
| CN112309360A (en) * | 2020-10-27 | 2021-02-02 | 深圳市百川安防科技有限公司 | Audio noise reduction system, shooting equipment and audio equipment |
-
2008
- 2008-12-23 CN CNU200820182409XU patent/CN201323620Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105025182A (en) * | 2015-06-11 | 2015-11-04 | 广东欧珀移动通信有限公司 | Noise reduction method and terminal |
| CN105025182B (en) * | 2015-06-11 | 2018-07-06 | 广东欧珀移动通信有限公司 | A kind of noise-reduction method and terminal |
| CN111385709A (en) * | 2018-12-27 | 2020-07-07 | 鸿富锦精密电子(郑州)有限公司 | Electronic device and noise elimination method |
| CN111314532A (en) * | 2020-02-17 | 2020-06-19 | Oppo广东移动通信有限公司 | Noise reduction method and device, electronic equipment and storage medium |
| CN112309360A (en) * | 2020-10-27 | 2021-02-02 | 深圳市百川安防科技有限公司 | Audio noise reduction system, shooting equipment and audio equipment |
| CN112309360B (en) * | 2020-10-27 | 2021-08-10 | 深圳市睿联技术股份有限公司 | Audio noise reduction system, shooting equipment and audio equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091007 Termination date: 20121223 |