CN103124386A - De-noising, echo-eliminating and acute directional microphone for long-distance speech - Google Patents
De-noising, echo-eliminating and acute directional microphone for long-distance speech Download PDFInfo
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- CN103124386A CN103124386A CN2012105725959A CN201210572595A CN103124386A CN 103124386 A CN103124386 A CN 103124386A CN 2012105725959 A CN2012105725959 A CN 2012105725959A CN 201210572595 A CN201210572595 A CN 201210572595A CN 103124386 A CN103124386 A CN 103124386A
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Abstract
The embodiment of the invention provides a de-noising, echo-eliminating and acute directional microphone device for a long-distance speech. The de-noising, echo-eliminating and acute directional microphone for the long-distance speech is characterized by comprising a microphone array unit, a circuit board unit and a chip unit, wherein the microphone unit further comprises at least two microphone monomers used for picking up sound signals; the at least two microphone monomers are respectively capable of directing arbitrarily; the chip unit is fixed on a circuit board unit and is connected to an output end of the microphone array; signals picked up by the microphone array unit are directly input to the chip unit for algebraic operation and amplification process; and the signals are output to a subsequent client.
Description
Technical field
The present invention relates to the microphone field, relate in particular to a kind of far saying with noise reduction, the echo that disappears, sharp directional microphone.
Background technology
Along with microphone is applied in more wide field, microphone of the prior art can't effectively be evaded noise, the poor signal quality of picking up under noisy environment.Therefore people have higher requirement to the microphone pickup, improving tonequality, reduce noise, eliminating under the prerequisite of echo, and people urgently wish to obtain the adjustable microphone of a kind of directive property, to tackle different scenes, pick up the sound of oneself wanting.But do not reach this requirement with a microphone pickup.Therefore adopted the mode of microphone array to solve the problems referred to above in some patented technologies, for example adopted the spirality microphone array in patent application 201010171963.X, the array main body is the rigid spoke of some planar spirals, and microphone is distributed near the crossover node of the evenly spaced n on this plane * n groined type lines.Adopted the layer-stepping microphone array in patent application 201010282467.1, microphone array is made of plural microphone, and microphone array is classified circle ring array as, and microphone array and audio signal processing circuit are placed in two-layer at least in housing.Adopted film type microphone array in patent application 201110117084.3, correspondence is provided with electrod-array respectively in piezo-electric electret thin film both sides, wiring board input and wiring board output that circuit board module is provided with microphone circuit and is electrically connected to microphone circuit, the wiring board input is electrically connected to the electrod-array of described piezo-electric electret thin film both sides.
The purpose of above-mentioned technology is all for effectively evading noise, picking up signal quality preferably.Microphone array directive property majority of the prior art is nonadjustable.Even there is adjustable situation, technology starting point of the present invention is also different from prior art, what the present invention adopted is that pure hardware approach realizes that directive property is adjustable, in processing procedure, pure analog signal is processed, do not pass through sampling processing, be not digital signal with analog signal conversion, so the data uncompressed, reproducibility is better.The present invention uses a microphone array and asic chip to solve this problem.Utilize one group of microphone array pickup, each road signal is done algebraic operation (add, subtract, multiplication and division etc.) through the asic chip, different operation methods obtains the different pickup bundle of directive property, can pick up the sound of wanting and suppress noise and interference in environment.
Summary of the invention
The embodiment of the present invention provides a kind of and far says with noise reduction, the echo that disappears, sharp directional microphone device, and it is characterized in that, described microphone comprises: microphone array column unit, circuit board unit, chip unit;
Wherein the microphone array column unit further comprises at least two microphone monomers, and described microphone monomer, is used for picking up voice signal with the mode uniform welding of pin or pad on described circuit board unit, and described microphone monomer can be any directive property;
Chip unit is fixed on circuit board unit, and is connected with the output of microphone array column unit, and the signal that the microphone array column unit picks up is directly inputted chip unit and can be carried out algebraic operation and amplify and process, and signal is outputed to subsequent client.
Described chip unit further comprises algebraic operation device and amplifier, described algebraic operation device can carry out all algebraic operations, be connected with the output of microphone array column unit, the input of described amplifier is connected with the output of described algebraic operation device, effect is amplifying signal, and signal is outputed to subsequent client.
Described chip unit is the asic chip.The asic chip unit carries out following computing to the signal that picks up:
Described at least two microphone monomers pick up respectively voice signal, be converted to respectively signal of telecommunication S1, S2, S3, S4 ... give every road signal a signal coefficient, be set as A, B, C, D ... represent algorithm with P, it comprises all algebraic operation rules, and the output after processing through the asic chip has following relational expression:
Output=(A*S1) P (B*S2) P (C*S3) P (D*S4) ... P (...) ...,
By controlling signal coefficient and the algorithm in above-mentioned formula, realize controlling the pickup angle of microphone array column unit, different operation methods obtains the different pickup bundle of directive property.
Wherein the asic chip unit also comprises the computing that the signal that picks up carries out:
Amplitude when getting the 30 degree sensing of microphone monomer, be assumed to be 0.8, described array has three microphone monomers, what suppose use is multiplication rule, it is 0.8*0.8*0.8=0.512 that three amplitudes multiply each other, whole 30 degree of microphone array point to amplitude and diminish, and directive property is sharpened, reaches the control to the pickup angle.
The embodiment of the present invention also provides a kind of microphone array to coordinate chip unit to control the method for pickup, it is characterized in that, the method is used a microphone arrangement, and described microphone comprises: microphone array column unit, circuit board unit, chip unit;
Wherein microphone unit further comprises at least two microphone monomers, and described microphone monomer, is used for picking up voice signal with the mode uniform welding of pin or pad on described circuit board unit, and described at least two microphone monomers are respectively any directive property;
Chip unit is fixed on circuit board unit, and is connected with the output of microphone array column unit, and the signal that the microphone array column unit picks up is directly inputted chip unit and can be carried out algebraic operation and amplify and process, and signal is outputed to subsequent client.
Described chip unit further comprises algebraic operation device and amplifier, described algebraic operation device can carry out all algebraic operations, be connected with the output of microphone array column unit, the input of described amplifier is connected with the output of described algebraic operation device, effect is amplifying signal, and signal is outputed to subsequent client.
Described chip unit is the asic chip.The asic chip unit carries out following computing to the signal that picks up:
Described at least two microphone monomers pick up respectively voice signal, be converted to respectively signal of telecommunication S1, S2, S3, S4 ... give every road signal a signal coefficient, be set as A, B, C, D ... represent algorithm with P, it comprises all algebraic operation rules, and the output after processing through the asic chip has following relational expression:
Output=(A*S1) P (B*S2) P (C*S3) P (D*S4) ... P (...) ...,
By controlling signal coefficient and the algorithm in above-mentioned formula, realize controlling the pickup angle of microphone array column unit, different operation methods obtains the different pickup bundle of directive property.
Wherein the asic chip unit also comprises the computing that the signal that picks up carries out:
Amplitude when getting the 30 degree sensing of microphone monomer, be assumed to be 0.8, described array has three microphone monomers, what suppose use is multiplication rule, it is 0.8*0.8*0.8=0.512 that three amplitudes multiply each other, whole 30 degree of microphone array point to amplitude and diminish, and directive property is sharpened, reaches the control to the pickup angle.
Description of drawings
Fig. 1 is circuit theory frame diagram of the present invention
Fig. 2 is the structural representation of one embodiment of the invention
Fig. 3 is the structural representation of another embodiment of the present invention
Fig. 4 is a concrete example of the directivity pattern of microphone of the present invention
Embodiment
Embodiment one:
As shown in Figure 1: take the array of three monomer compositions as example (the array amount of monomer is determined by concrete pickup environment), wherein:
Microphone monomer 10, microphone monomer 11 and microphone monomer 12, (microphone monomer directive property can be different) pick up respectively voice signal, be converted to three road signal of telecommunication S1, S2 and S3 directly input the asic chip and carry out algebraic operation, and the asic chip has three functions; (1) give every road signal a signal coefficient, be set as A, B, C; (2) comprise all algebraic operation rules as add, subtract, multiplication and division etc., we represent algorithm with P; (3) amplification is arranged.Wherein the directive property of microphone monomer 10, microphone monomer 11 and microphone monomer 12 can be different.
Output after processing through the asic chip has following relational expression:
Output=(A*S1) P (B*S2) P (C*S3)
If a plurality of microphone monomers are in like manner arranged, relational expression is expanded and is:
Output=(A*S1) P (B*S2) P (C*S3) P (D*S4) ... P (...)
Wherein, S1, S2, S3 ... the signal of telecommunication of representation conversion; A, B, C, D ... the signal coefficient that represents every road signal; P represents algorithm.
By control signal coefficient and algorithm, the directive property angle that just can obtain wanting, different operation methods obtain the different pickup bundle of directive property.By algorithm with some angle signal attenuation fall, thereby make it possess the adjustable function of directive property angle.
Referring to Fig. 4, take 3 unidirectional microphines as example, drawn heart-shaped figure on coordinate is the directivity pattern of microphone.
As shown in coordinate, get 30 amplitudes when spending, be assumed to be 0.8, affiliated array has three microphone monomers, and what suppose use is multiplication rule, and it is 0.8*0.8*0.8=0.512 that three amplitudes multiply each other, this shows that the directive property after multiplying each other is sharpened, namely directive property has changed.
A kind of far the saying with noise reduction, the echo that disappears, sharp directional microphone as shown in Figure 2 that this embodiment provides: as an example of the array of three monomer compositions example (amount of monomer of array is determined by concrete pickup environment), comprise microphone array column unit 1, circuit board unit 2, asic chip unit 3.
Midget microphone monomer 10, midget microphone monomer 11, midget microphone monomer 12 can be respectively any directive property, and inside does not contain junction field effect transistor (JFET).Comprise JFET in circuit due to microphone monomer itself, its effect is amplifying signal, and amplifying signal has a little distortion, then does the algebraic operation meeting and further strengthen distortion, and in this invention, we first do computing to signal, follow-up amplification again.
The signal that microphone array column unit 1 picks up is directly inputted chip unit 3 and is processed.
Asic chip unit 3 comprises algebraic operation device 30, amplifier 31.
Described algebraic operation device 30 can carry out all algebraic operations, is connected with microphone array 1 output.
The input of amplifier 31 is connected with the output of algebraic operation device 30, and effect is amplifying signal, and signal is outputed to subsequent client.
Wherein, the midget microphone amount of monomer in above-mentioned one group of microphone array is variable, is determined by the pickup environment.And the directive property of microphone array is controlled.
The directive property of microphone monomer roughly has three kinds, the single sensing, and full the sensing and two the sensing, after the microphone monomer is determined, directive property has also just been determined, according to the above description as seen, any directive property of the present invention refers to that three kinds of directive property can choose wantonly without constraint.
Embodiment two:
As shown in Figure 3, the microphone arrangement of the another specific embodiment of the present invention, be that with the difference of embodiment one arrangement mode of microphone monomer changes, adopt a plurality of microphone array column units and circuit board unit to form a face array, described a plurality of microphone array column unit can be respectively any directive property, and inside does not contain JFET.The advantage of this kind structure is identical with embodiment one, can also derivation go out more form, is applicable to various occasions.
Above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to above-described embodiment, the present invention is had been described in detail, it will be understood by those of skill in the art that it still can modify to the technical scheme that previous embodiment is put down in writing, perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of embodiment of the present invention technical scheme.
Claims (10)
1. far say with noise reduction, the echo that disappears, sharp directional microphone device for one kind, it is characterized in that, described microphone comprises: microphone array column unit, circuit board unit, chip unit;
Wherein the microphone array column unit further comprises at least two microphone monomers, and described microphone monomer, is used for picking up voice signal with the mode uniform welding of pin or pad on described circuit board unit, and described microphone monomer can be any directive property;
Chip unit is fixed on circuit board unit, and is connected with the output of microphone array column unit, and the signal that the microphone array column unit picks up is directly inputted chip unit and carried out algebraic operation and amplify and process, and signal is outputed to subsequent client.
2. microphone arrangement according to claim 1, it is characterized in that, described chip unit further comprises algebraic operation device and amplifier, described algebraic operation device can carry out all algebraic operations, be connected with the output of microphone array column unit, the input of described amplifier is connected with the output of described algebraic operation device, and effect is amplifying signal, and signal is outputed to subsequent client.
3. microphone arrangement according to claim 2, is characterized in that, described chip unit is the asic chip.
4. microphone arrangement according to claim 3, is characterized in that, the asic chip unit carries out following computing to the signal that picks up:
Described at least two microphone monomers pick up respectively voice signal, be converted to respectively signal of telecommunication S1, S2, S3, S4 ... give every road signal a signal coefficient, be set as A, B, C, D ... represent algorithm with P, it comprises all algebraic operation rules, and the output after processing through the asic chip has following relational expression:
Output=(A*S1) P (B*S2) P (C*S3) P (D*S4) ... P (...) ...,
By controlling signal coefficient and the algorithm in above-mentioned formula, realize controlling the pickup angle of microphone array column unit, different operation methods obtains the different pickup bundle of directive property.
5. microphone arrangement according to claim 4, is characterized in that, the asic chip unit also comprises the computing that the signal that picks up carries out:
Amplitude when getting the 30 degree sensing of microphone monomer, be assumed to be 0.8, described array has three microphone monomers, what suppose use is multiplication rule, it is 0.8*0.8*0.8=0.512 that three amplitudes multiply each other, microphone array whole unit 30 degree point to amplitude and diminish, and directive property is sharpened, reaches the control to the pickup angle.
6. a microphone array coordinates chip unit to control the method for pickup, it is characterized in that, the method is used a microphone arrangement, and described microphone comprises: microphone array column unit, circuit board unit, chip unit;
Wherein the microphone array column unit further comprises at least two microphone monomers, and described microphone monomer, is used for picking up voice signal with the mode uniform welding of pin or pad on described circuit board unit, and described microphone monomer can be any directive property;
Chip unit is fixed on circuit board unit, and is connected with the output of microphone array column unit, and the signal that the microphone array column unit picks up is directly inputted chip unit and carried out algebraic operation and amplify and process, and signal is outputed to subsequent client.
7. the method for control pickup according to claim 6, it is characterized in that, described chip unit further comprises algebraic operation device and amplifier, described algebraic operation device can carry out all algebraic operations, be connected with the output of microphone array column unit, the input of described amplifier is connected with the output of described algebraic operation device, and effect is amplifying signal, and signal is outputed to subsequent client.
8. the method for control pickup according to claim 7, is characterized in that, described chip unit is the asic chip.
9. the method for control pickup according to claim 8, is characterized in that, the asic chip unit carries out following computing to the signal that picks up:
Described at least two microphone monomers pick up respectively voice signal, be converted to respectively signal of telecommunication S1, S2, S3, S4 ... give every road signal a signal coefficient, be set as A, B, C, D ... represent algorithm with P, it comprises all algebraic operation rules, and the output after processing through the asic chip has following relational expression:
Output=(A*S1) P (B*S2) P (C*S3) P (D*S4) ... P (...) ...,
By controlling signal coefficient and the algorithm in above-mentioned formula, realize controlling the pickup angle of microphone array column unit, different operation methods obtains the different pickup bundle of directive property.
10. the method for control pickup according to claim 9, is characterized in that, the asic chip unit also comprises the computing that the signal that picks up carries out:
Amplitude when getting the 30 degree sensing of microphone monomer, be assumed to be 0.8, described array has three microphone monomers, what suppose use is multiplication rule, it is 0.8*0.8*0.8=0.512 that three amplitudes multiply each other, microphone array whole unit 30 degree point to amplitude and diminish, and directive property is sharpened, reaches the control to the pickup angle.
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| CN2012105725959A CN103124386A (en) | 2012-12-26 | 2012-12-26 | De-noising, echo-eliminating and acute directional microphone for long-distance speech |
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| CN110926784A (en) * | 2019-12-10 | 2020-03-27 | 上海欧秒电力监测设备有限公司 | GIS circuit breaker fault on-line monitoring device based on sound |
| CN111223254A (en) * | 2018-11-23 | 2020-06-02 | 无锡科晟光子科技有限公司 | Sound alarm sensor with high accuracy |
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Application publication date: 20130529 |