CN207529658U - A kind of web camera circuit with microphone array - Google Patents
A kind of web camera circuit with microphone array Download PDFInfo
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- CN207529658U CN207529658U CN201721645800.4U CN201721645800U CN207529658U CN 207529658 U CN207529658 U CN 207529658U CN 201721645800 U CN201721645800 U CN 201721645800U CN 207529658 U CN207529658 U CN 207529658U
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- microphone array
- web camera
- microphone
- diamylose
- main control
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Abstract
A kind of web camera circuit with microphone array, including two-microphone array, diamylose handover module, web camera main control module and the audio frequency power amplifier output module sequentially connected, audio frequency power amplifier output module is also connect with diamylose handover module.The two-microphone array includes two electrets and simulates microphone and low pressure difference linear voltage regulator；3.3V DC voltage conversions are 2.5V DC voltages by low pressure difference linear voltage regulator, for providing bias voltage to microphone.Its advantage is that the difference that two or more microphones can be utilized to receive between the phase of sound wave is filtered sound wave, can to greatest extent filter environmental background sound, realize remote pickup.Good echo cancellor effect can be realized in the case where volume output is larger, the equipment for using this configuration in a noisy environment can be apparent from pickup effect, no noise.
Description
Technical field
The utility model is related to television cameras, are related to being specially adapted for keeping in adverse environment (for example, noisy environment)
Robustness or the speech recognition technology for enhancing voice intensity, espespecially a kind of web camera circuit with microphone array.
Background technology
The web camera of the prior art is all to carry out pickup using a microphone, is not acquired using dual microphone
With audio output loopback.Pickup is apart from short, and noise is larger, and echo cancellor effect is poor, and there are the unsharp shortcomings of pickup.
Invention content
In view of the shortcomings of the prior art, the purpose of this utility model is to provide a kind of pickup distances, and noise is smaller, return
The good pickup of the sound eradicating efficacy clearly web camera circuit with microphone array.
Technical solution is used by the utility model solves its technical problem：A kind of network with microphone array is provided
Camera circuitry, it is characterised in that：Including sequentially connect two-microphone array, diamylose handover module, web camera master control
Module and audio frequency power amplifier output module, audio frequency power amplifier output module are also connect with diamylose handover module.
Web camera main control module is known design.Web camera main control module is selected by diamylose handover module
The pattern or audio output loopback of dual microphone acquisition add the pattern that single microphone acquires.
Further：
The two-microphone array includes two electrets and simulates microphone and low pressure difference linear voltage regulator；Two microphones
Mounting distance ranging from 4cm~9cm, and prevent from shaking using silica gel sheath, the mode connected up using difference in wires design
Reduce circuit noise；3.3V DC voltage conversions are 2.5V DC voltages by low pressure difference linear voltage regulator, for being carried to microphone
For bias voltage.
The diamylose handover module is switched using SGM3157 single analogs.
The audio frequency power amplifier output module circuit diagram uses JZ4890 power amplifier chips.
The web camera main control module uses MSC316D, and as main control chip, the chip provides two-way analog audio
Frequency acquisition interface and audio output interface can access two-microphone array.
The web camera main control module thinks HI3518E main control chips using sea, also has two-way analogue audio frequency
Acquisition interface.
The beneficial effects of the utility model are：Using microphone array technology, two or more microphones can be utilized to receive
Sound wave is filtered to the difference between the phase of sound wave, can to greatest extent be filtered environmental background sound, is realized remote
Pickup.And hardware exchange function is added in, can realize good echo cancellor effect in the case where volume output is larger,
Equipment for using this configuration in a noisy environment, can be apparent from pickup effect, no noise.
Description of the drawings
The utility model will be further described below in conjunction with the accompanying drawings.
Fig. 1 is the functional block diagram of the utility model preferred embodiment；
Fig. 2 is the circuit diagram of the utility model preferred embodiment two-microphone array；
Fig. 3 is the utility model preferred embodiment diamylose switch module circuit diagram；
Fig. 4 is the utility model preferred embodiment audio output module circuit diagram；
Fig. 5 is the utility model preferred embodiment web camera audio interface circuit figure；
Fig. 6 is the utility model preferred embodiment another kind web camera audio interface circuit figure.
Specific embodiment
Referring to attached drawing 1, a kind of web camera circuit with microphone array of the utility model, it is characterised in that：Including
Two-microphone array 1, diamylose handover module 2, web camera main control module 3 and the audio frequency power amplifier output module 4 sequentially connected,
Audio frequency power amplifier output module 4 is also connect with diamylose handover module 2.
Web camera main control module 3 is known design.Web camera main control module 3 can by diamylose handover module come
The pattern or audio output loopback of selection dual microphone acquisition add the pattern that single microphone acquires.
Fig. 2 is two-microphone array circuit diagram, including 2 electret simulation microphones and low pressure difference linear voltage regulator U10.
2 microphone mounting distance ranging from 4cm to 9cm, and prevent from shaking using silica gel sheath, difference cloth is used in wires design
The mode of line reduces circuit noise.3.3V DC voltage conversions are 2.5V DC voltages by low pressure difference linear voltage regulator U10, are used for
Bias voltage is provided to microphone, works normally microphone.
Fig. 3 is diamylose switch module circuit diagram, switchs U9 using SGM3157 single analogs to realize.In the normal mode
Master control uses dual microphone drainage pattern, when playing audio, will wherein be used for the acquisition of audio output loopback all the way.Master control can
Switch the input terminal of SGM3157 by GPIO, audio frequency simulation output is collected into master control, R59 electricity with the mode of circuit loopback
Resistance plays the role of partial pressure with R60 resistance, so that master control can correctly collect the data of audio output loopback.
Fig. 4 is audio frequency power amplifier output module circuit diagram, and U13 uses JZ4890 power amplifier chips, and FH8 is used to connect loudspeaker.
During installation, loudspeaker should be far from microphone.
Fig. 5 is web camera master control audio interface circuit figure, is public version design in addition to voicefrequency circuit.The utility model
Embodiment uses MSC316D, and as main control chip, the chip provides two-way analogue audio frequency acquisition interface and audio output interface,
Two-microphone array can be accessed.
Fig. 6 is another web camera master control audio interface circuit figure, and a variety of master control cores can be used in the utility model practicality example
Piece, as long as it has two-way analogue audio frequency acquisition interface, with regard to that can access two-microphone array and diamylose handover module.Fig. 6 is used
Master control be Hai Si HI3518E main control chips, also have two-way analogue audio frequency acquisition interface.
2 microphones can form microphone array, improve pickup distance.Relatively single microphone, it utilizes microphone
Between phase difference, produce directive property：In the direction pointed by beam main lobe, voice signal is strengthened, and other sound
Sound is but suppressed.Therefore its antijamming capability strengthens；Sound source can also be inhibited simultaneously in the reflection signal in other directions, thus
Reduce reverberation.
Claims (6)
1. a kind of web camera circuit with microphone array, it is characterised in that：Including sequentially connect two-microphone array,
Diamylose handover module, web camera main control module and audio frequency power amplifier output module, audio frequency power amplifier output module are also cut with diamylose
Change the mold block connection.
2. a kind of web camera circuit with microphone array according to claim 1, it is characterised in that：The diamylose
Gram wind array includes two electrets and simulates microphones and low pressure difference linear voltage regulator；Two microphone mounting distances are ranging from
4cm~9cm, and prevent from shaking using silica gel sheath, in wires design circuit noise is reduced using the mode that difference connects up；It is low
3.3V DC voltage conversions are 2.5V DC voltages by pressure difference linear voltage regulator, for providing bias voltage to microphone.
3. a kind of web camera circuit with microphone array according to claim 1, it is characterised in that：The diamylose
Handover module is switched using SGM3157 single analogs.
4. a kind of web camera circuit with microphone array according to claim 1, it is characterised in that：The audio
Power amplifier output module circuit diagram uses JZ4890 power amplifier chips.
5. a kind of web camera circuit with microphone array according to claim 1, it is characterised in that：The network
Video camera main control module uses MSC316D as main control chip.
6. a kind of web camera circuit with microphone array according to claim 1, it is characterised in that：The network
Video camera main control module thinks HI3518E main control chips using sea.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721645800.4U CN207529658U (en) | 2017-12-01 | 2017-12-01 | A kind of web camera circuit with microphone array |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721645800.4U CN207529658U (en) | 2017-12-01 | 2017-12-01 | A kind of web camera circuit with microphone array |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207529658U true CN207529658U (en) | 2018-06-22 |
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ID=62581241
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721645800.4U Active CN207529658U (en) | 2017-12-01 | 2017-12-01 | A kind of web camera circuit with microphone array |
Country Status (1)
| Country | Link |
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| CN (1) | CN207529658U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113012707A (en) * | 2019-12-19 | 2021-06-22 | 南京品尼科自动化有限公司 | Voice module capable of eliminating echo |
-
2017
- 2017-12-01 CN CN201721645800.4U patent/CN207529658U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113012707A (en) * | 2019-12-19 | 2021-06-22 | 南京品尼科自动化有限公司 | Voice module capable of eliminating echo |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200108 Address after: 518000 unit 203, building 3, xujingjiayuan (phase I), Bantian street, Longgang District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Wulang Intelligent Technology Co., Ltd Address before: 518000 Guangdong city of Shenzhen province Nanshan District Guangdong streets Science Park Road 4, 4 floor B01 Patentee before: Shenzhen sound Acoustics Technology Co., Ltd. |
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| TR01 | Transfer of patent right |