CN109151408A - A kind of full duplex window talkback device, system and its intercommunication method - Google Patents
A kind of full duplex window talkback device, system and its intercommunication method Download PDFInfo
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- CN109151408A CN109151408A CN201811315727.3A CN201811315727A CN109151408A CN 109151408 A CN109151408 A CN 109151408A CN 201811315727 A CN201811315727 A CN 201811315727A CN 109151408 A CN109151408 A CN 109151408A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
- H04N7/183—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a single remote source
- H04N7/186—Video door telephones
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q5/00—Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange
- H04Q5/24—Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange for two-party-line systems
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- Computer Networks & Wireless Communication (AREA)
- Telephonic Communication Services (AREA)
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Abstract
The present invention provides a kind of full duplex window talkback device, system and its intercommunication method, belongs to window talkback technical field.The host sound pick-up module of full duplex window talkback device includes at least two for acquiring the host pickup microphone of audio signal, and extension set sound pick-up module includes at least two for acquiring the extension set pickup microphone of audio signal.Host loudspeaker module and at least two host pickup microphones are electrically connected with host signal processing module and are all set in host shell, extension set loudspeaker module and at least two extension set pickup microphones are electrically connected with extension set signal processing module and are all set in extension set shell, and host signal processing module is electrically connected with extension set signal processing module.The host signal processing module of intercom system is electrically connected with mechatronics, switch-to-server is exchanged.This intercommunication method is realized by above-mentioned intercom system, is installed pickup microphone in the inside of host and extension set, is not needed peripheral hardware microphone bar, keep its structure more beautiful.
Description
Technical field
The present invention relates to window talkback technical field, in particular to a kind of full duplex window talkback device, system and
Its intercommunication method.
Background technique
The counter windows such as bank, hospital, station are fitted with greatly window talkback device, to meet staff and client
Between communication.In the prior art, either analogue window talkback unit or numerical aperture talkback unit, indoor unit is all
It is provided with cylinder bar if an external angle adjustable.
There are problems: the equipment that staff uses has microphone bar, and exchange when needs in face of the top of microphone bar
It closely speaks, being pasted onto for legacy windows intercommunication causes blocking for certain visual angle and blocking for microphone bar on window, be unfavorable for
Both sides' communication and image forensics；The sound of the equipment that external conversations people uses, sound pick-up acquisition is very extensive, so that
The all collected device plays for being transferred to staff of confused noise sound of noise, ambient noise, irrelevant personnel, bring very big tired
It disturbs.
Summary of the invention
The first object of the present invention is to provide a kind of full duplex window talkback device, does not need that microphone bar is arranged
Effective communication is carried out, keeps main machine structure more beautiful.
The second object of the present invention is to provide a kind of full duplex window talkback system, uses above-mentioned full duplex window talkback
Device, not needing setting microphone bar can be carried out effective communication, keep main machine structure more beautiful.
The third object of the present invention is to provide a kind of intercommunication method of full duplex window talkback system, using above-mentioned complete double
Work window talkback system, not needing setting microphone bar can be carried out effective communication, keep main machine structure more beautiful.
Based on above-mentioned first purpose, the present invention adopts the following technical solutions is realized:
A kind of full duplex window talkback device, including host and extension set, host include host shell, host loudspeaker mould
Block, host signal processing module, host sound pick-up module；Extension set includes extension set shell, extension set loudspeaker module, at extension set signal
Manage module and extension set sound pick-up module；
Host sound pick-up module includes at least two for acquiring the host pickup microphone of audio signal, extension set sound pick-up mould
Block includes at least two for acquiring the extension set pickup microphone of audio signal；
Host loudspeaker module and at least two host pickup microphones are electrically connected and are all provided with host signal processing module
It is placed in host shell, extension set loudspeaker module and at least two extension set pickup microphones are electrically connected with extension set signal processing module
And be all set in extension set shell, host signal processing module is electrically connected with extension set signal processing module.
Optionally, in another embodiment of the present invention, above-mentioned host shell includes host housing and host dust cover, works as master
When machine shell is placed on horizontal plane, the axis of each host pickup microphone and the angle of horizontal plane are 0 ° -60 °, host dust cover
Lid is respectively positioned on each host pickup microphone in host housing loaded on host housing.
Optionally, in another embodiment of the present invention, above-mentioned host further includes key control module, key control module with
The electrical connection of host signal processing module, key control module are set to host housing.
Optionally, in another embodiment of the present invention, above-mentioned extension set further includes camera, camera and extension set signal processing
Module electrical connection, camera are set to extension set shell.
Based on above-mentioned second purpose, the present invention adopts the following technical solutions is realized:
A kind of full duplex window talkback system, including interchanger, server and above-mentioned full duplex window talkback device, host
Signal processing module is electrically connected with mechatronics, switch-to-server is exchanged.
Based on above-mentioned third purpose, the present invention adopts the following technical solutions is realized:
A kind of intercommunication method of above-mentioned full duplex window talkback system, includes the following steps:
At least two host pickup microphones acquire the first voice signal simultaneously and the first voice signal are converted to the first electricity
First electric signal is passed to host signal processing module and is handled to obtain the second electric signal by signal, and the second electric signal is passed
Extension set loudspeaker module is passed, the second electric signal is reduced by second sound signal by extension set loudspeaker module and passes through extension set
Loudspeaker module issues；
At least two extension set pickup microphones acquire third voice signal simultaneously and third voice signal are converted to third electricity
Third electric signal is passed to extension set signal processing module and is handled to obtain the 4th electric signal by signal, and the 4th electric signal is passed
Host loudspeaker module is passed, the 4th electric signal is reduced by falling tone sound signal by host loudspeaker module and passes through host
Loudspeaker module issues.
Optionally, in another embodiment of the present invention, distance of above-mentioned first sound generation source apart from host pickup microphone is
10-150cm, distance of second sound generation source apart from extension set pickup microphone are 10-150cm.
Optionally, in another embodiment of the present invention, acquisition of the above-mentioned each host pickup microphone to the first voice signal
Angle is 30 ° -70 °, and each extension set pickup microphone is 30 ° -70 ° to the acquisition angles of third voice signal.
Optionally, in another embodiment of the present invention, above-mentioned full duplex window talkback system further includes camera, camera
It is electrically connected with extension set signal processing module；
Camera collection image information, and image information is converted to the 5th electric signal passes to the 5th electric signal point
Machine signal processing module is sent to host signal processing module and passes to server by interchanger after being handled.
Optionally, in another embodiment of the present invention, above-mentioned full duplex window talkback system further includes key control module,
Key control module is electrically connected with host signal processing module, pressing keys control module, by the second electric signal and the 4th telecommunications
Number passing to server by interchanger is stored.
Compared with prior art, presently preferred embodiments of the present invention provides full duplex window talkback device, system and its right
The beneficial effect for saying method includes:
By being arranged extension set pickup microphone in extension set shell, host pickup microphone is arranged in host shell, makes to lead
Machine and extension set can collected sound signal, do not need that microphone bar is arranged outside, shape is more beautiful.By in host and extension set
At least two interior pickup microphones acquire the first voice signal simultaneously, and the first voice signal acquired between two pickup microphones is deposited
In phase difference, the sound of assigned direction can be enhanced, weaken the sound in other directions, keep the laser propagation effect of sound more preferable.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings and also belong to protection scope of the present invention.
Fig. 1 is the structural schematic diagram of full duplex window talkback system provided in an embodiment of the present invention；
Fig. 2 is the structural schematic diagram of host in full duplex window talkback system provided in an embodiment of the present invention；
Fig. 3 is the structural schematic diagram of extension set in full duplex window talkback system provided in an embodiment of the present invention；
Fig. 4 is the mounting structure schematic diagram of host pickup microphone in host provided in an embodiment of the present invention；
Fig. 5 is the pickup angle schematic diagram of host pickup microphone in host provided in an embodiment of the present invention.
Icon: 1- full duplex window talkback system；10- interchanger；20- server；30- full duplex window talkback dress
It sets；31- host；32- extension set；311- host loudspeaker module；312- host signal processing module；313- host pickup
Device module；314- key control module；315- network and power supply interface module；321- extension set loudspeaker module；322- points
Machine signal processing module；323- extension set sound pick-up module；324- camera；3131- host pickup microphone；3231- extension set
Pickup microphone.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be arranged and be designed with a variety of different configurations.Therefore, below to the reality of the invention provided in the accompanying drawings
The detailed description for applying example is not intended to limit the range of claimed invention, but is merely representative of selected implementation of the invention
Example.Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts
Every other embodiment, shall fall within the protection scope of the present invention.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
Embodiment
Fig. 1 is the structural schematic diagram of full duplex window talkback system 1 provided in this embodiment.Referring to Fig. 1, the present embodiment
In, full duplex window talkback system 1 includes interchanger 10, server 20 and full duplex window talkback device 30, full duplex window
Talkback unit 30 is electrically connected with interchanger 10, and interchanger 10 is electrically connected with server 20.Optionally, full duplex window talkback device
30 are connect with interchanger 10 by cable, and interchanger 10 is connect with server 20 by cable.Similarly: full duplex window talkback
Connection between device 30 and interchanger 10 and interchanger 10 and server 20 not only can be to be attached by network,
It can be attached by wireless WiFi, bluetooth or by other data lines, as long as being able to carry out the transmission of signal.
In the present embodiment, (9-12V) DC power source adapter can be selected to power interchanger 10 or using direct current
The POE of 12V powers to interchanger 10.Under general mode, when full duplex window talkback device 30 is powered using adapter, interchanger
10 can meet technical need using conventional switch 10；According to POE power supply mode, then this interchanger 10 will use POE
Interchanger 10.
It should be understood that the server 20 in the present embodiment can be general commercial computer or professional server 20
, service software is mainly installed, service software can carry out classification and marking processing by audio-frequency information of the computer hardware to storage,
By clicking the selecting module on service software, it is able to enter the interface of different recording file storages, and be able to carry out recording
The format of file is converted.
The recording file of window talkback is divided into conventional recording and evidence obtaining recording, when the file mark for recording of collecting evidence has recording
Between, after being opened by service software, it can also look at the time point label of emphasis speech content, directly drag to the mark point,
The part recording substance can be listened to.In addition, 20 management software of server also open protocol, is the soft of other public servicers 20
The data-interface of part system offer audio and video.
In the present embodiment, full duplex window talkback device 30 includes host 31 and extension set 32.Full duplex talkback unit picks up
Sound angle can be configured by 20 management software of server or Web page, can be preset depending on the site environment, angle
30 ° -120 ° of range of setting.Enter terminal management interface by management software or Web page, the parameter into host 31 is set
Set interface, the voice signal acquired within the scope of selection orientation enhancing 32 specified angle of extension set, when host signal processing module 312 is right
When the voice signal of extension set 31 carries out calculation process, the angular range numerical value of parameter setting can be preferentially transferred, it is such as not set,
Then default angle is 30 ° -70 °.
Fig. 2 is the structural schematic diagram of host 31 in full duplex window talkback system 1 provided in this embodiment.Referring to Fig. 2,
In the present embodiment, host 31 includes host shell, host loudspeaker module 311, host signal processing module 312, host pickup
Device module 313 and key control module 314, host loudspeaker module 311, host sound pick-up module 313, key control module
314 and network and power supply interface module 315 be electrically connected with host signal processing module 312.Host shell is its of host 31
The installation foundation of his component.
In the present embodiment, host shell includes host housing and host dust cover, host loudspeaker module 311, host letter
Number processing module 312, host sound pick-up module 313 and key control module 314 are arranged on host housing, and pass through host
Dust shroud is loaded on host housing, has no effect on the pickup effect of host 31.When in use, host 31 is placed indoors
Desktop on, so as to staff carry out using.
Host loudspeaker module 311 can be loudspeaker, after the voice signal for receiving extension set 32, by what is handled well
Acoustic information is reduced into sound and amplifies releasing, so that staff can have a clear understanding of the demand of client, carries out ditch with client
It is logical.
Host sound pick-up module 313 includes at least two for acquiring the host pickup microphone 3131 of audio signal, host
Sound pick-up module 313 may include two host pickup microphones 3131 and multiple main frames pickup microphone 3131.Host loudspeaker mould
Block 311 and at least two host pickup microphones 3131 are electrically connected with host signal processing module 312 and are all set in main case
In vivo.
It is arranged in host shell by host pickup microphone 3131, enables 31 collected sound signal of host, do not need
Microphone bar is set outside, and shape is more beautiful.Pass through at least two host pickup microphones 3131 while acquisition sound in host 31
Sound signal, there are phase differences for the voice signal acquired between two host pickup microphones 3131, can enhance the sound of assigned direction
Sound weakens the sound in other directions, keeps the laser propagation effect of sound more preferable.
Host signal processing module 312 is electrically connected with interchanger 10, and interchanger 10 is electrically connected with server 20.On host 31
It is additionally provided with network and power supply interface module 315, host signal processing module 312 is electrically connected with network and power supply interface module 315
It connects, network and power supply interface module 315 are electrically connected by cable with interchanger 10, and are connected power supply and filled to entire full duplex intercommunication
Offer electric energy is provided.
Host loudspeaker module 311, host sound pick-up module 313, key control module 314 and network and power interface mould
Block 315 can be connected in host signal processing module 312 by conducting wire, and modules can also be integrated in one piece of host 31
On chip, to be installed in host shell.
Host signal processing module 312 includes multiple groups DSP filter, echo cancellation module, sound field suppression module and compiles solution
Code device, host pickup microphone 3131 are electrically connected with sound field suppression module, and sound field suppression module is electrically connected with echo cancellation module, are returned
Sound cancellation module is sequentially connected electrically with multiple groups DSP filter, and DSP filter is electrically connected with codec.
After the host pickup microphone 3131 of host 31 collects voice signal, by host pickup microphone 3131 by sound
Signal is converted to electric signal, weakens miscellaneous signal by sound field suppression module, is eliminated echo signal by echo cancellation module,
Miscellaneous signal is eliminated by multiple groups DSP filter, the electric signal that main signal is main signal is obtained, is compiled by codec
Code completes signal operation and processing.
Key control module 314 is electrically connected with host signal processing module 312, and key control module 314 is set to host
Shell.By operation button control module 314, it is able to carry out recording, electric signal will be transmitted to server by interchanger 10
20 are saved, and electric signal output valve third party's memory can also be saved.
Fig. 3 is the structural schematic diagram of extension set 32 in full duplex window talkback system 1 provided in this embodiment.Referring to Fig. 3,
In the present embodiment, extension set 32 includes extension set shell, extension set loudspeaker module 321, extension set signal processing module 322 and extension set pickup
Device module 323 and camera 324, extension set loudspeaker module 321, extension set sound pick-up module 323 and camera 324 are believed with extension set
Number processing module 322 is electrically connected.Extension set shell is the installation foundation of the other component of extension set 32.The structure and host of extension set shell
The knot of shell is similar, and the volume of extension set shell is less than the volume of host shell.
In the present embodiment, extension set shell includes extension set shell and extension set dust cover, extension set loudspeaker module 321, extension set letter
Number processing module 322, extension set sound pick-up module 323 and camera 324 are arranged on extension set shell, and pass through extension set dust cover
Lid is loaded on extension set shell, has no effect on the pickup effect of extension set 32, camera 324 exposes extension set dust cover, so as to client's
Image is acquired.When in use, extension set 32 is placed on outdoor desktop, so that client carries out using and not having to
Extension set 32 is pasted on glass, it is easier for installation.
Extension set loudspeaker module 321 can be loudspeaker, after the voice signal for receiving host 31, by what is handled well
Acoustic information is reduced into sound and amplifies releasing, so that client can have a clear understanding of the demand of staff, with staff into
Row is linked up.
Extension set sound pick-up module 323 includes at least two for acquiring the extension set pickup microphone 3231 of audio signal, extension set
Sound pick-up module 323 may include two extension set pickup microphones 3231 and multiple extension set pickup microphones 3231.Extension set loudspeaker mould
Block 321 and at least two extension set pickup microphones 3231 are electrically connected with extension set signal processing module 322 and are all set in extension set shell
In vivo.
By being arranged extension set pickup microphone 3231 in extension set shell, enabling 32 collected sound signal of extension set, being not required to
Microphone bar is set outside, and shape is more beautiful.It is acquired simultaneously by least two extension set pickup microphones 3231 in extension set 32
Voice signal, there are phase differences for the voice signal acquired between two extension set pickup microphones 3231, can enhance assigned direction
Sound weakens the sound in other directions, keeps the laser propagation effect of sound more preferable.
Extension set signal processing module 322 is electrically connected with host signal processing module 312, extension set signal processing module 322 with
The sound field suppression module of host signal processing module 312 is electrically connected.Optionally, the extension set signal processing module 322 of extension set 32 with
By conducting wire connection, core wire connection or RS485 connection between the host signal processing module 312 of host 31, to realize master
Power supply and signal intercommunication between machine 31 and extension set 32.
The principle of extension set signal processing module 322 is consistent with the principle of host signal processing module 312, but at extension set signal
Reason module 322 carries out simple noise reduction filtering processing, and host signal processing module 312 assumes responsibility for the operation of the electric signal of extension set 32
Function, has biggish host PCB circuit board, and each module of host 31 is integrated in host PCB circuit board.
Fig. 4 is the mounting structure schematic diagram of host pickup microphone 3131 in host 31 provided in this embodiment.Please refer to figure
4, in the present embodiment, when host housing to be placed on horizontal plane, when host housing is placed on the desktop before staff's body, often
The axis of a host pickup microphone 3131 and the angle α of horizontal plane are 0 ° -60 °, and host dust shroud makes often loaded on host housing
A host pickup microphone 3131 is respectively positioned in host housing.Correspondingly, when extension set shell being placed on horizontal plane, host housing is set
When on the desktop before client's body, the axis of each extension set pickup microphone 3231 and the angle α of horizontal plane are 0 ° -60 °, extension set
Dust shroud is respectively positioned on each extension set pickup microphone 3231 in extension set shell loaded on extension set shell.
In the present embodiment, extension set 32 is consistent with the collection of host 31 principle of collected sound signal, by installing this angle
Pickup microphone, to be acquired to voice signal, sound generation source can directly pronounce against pickup microphone, sound collection
Effect is more preferable, avoids collecting noise.
In addition, camera 324 is electrically connected with extension set signal processing module 322, camera 324 is set to extension set shell, leads to
The image of client can be acquired and picture signal is converted to electric signal by crossing camera 324, pass to host signal processing module
312, then it is transmitted to server 20 by interchanger 10, the server of public security system can also be passed to by server 20
20 carry out image comparison, accurately arrest the suspect of station booking window.
The intercommunication method of full duplex window talkback system 1, includes the following steps:
At least two host pickup microphones 3131 acquire the first voice signal simultaneously and the first voice signal are converted to the
First electric signal is passed to host signal processing module 312 and is handled to obtain the second electric signal by one electric signal, by the second electricity
Signal passes to extension set loudspeaker module 321, and second electric signal is reduced into rising tone message by extension set loudspeaker module 321
Number and by extension set loudspeaker module 321 issue.
At least two extension set pickup microphones 3231 acquire third voice signal simultaneously and third voice signal are converted to the
Third electric signal is passed to extension set signal processing module 322 and is handled to obtain the 4th electric signal by three electric signals, by the 4th electricity
Signal passes to host loudspeaker module 311, and the 4th electric signal is reduced into falling tone message by host loudspeaker module 311
Number and by host loudspeaker module 311 issue.
It realizes that the intercommunication between host 31 and extension set 32 is linked up by the above method, and directly passes through extension set pickup microphone
3231 and 3131 collected sound signal of host pickup microphone, the use of microphone bar is avoided, makes the outside of host 31 and extension set 32 all
It is more beautiful.
Further, key control module 314 is electrically connected with host signal processing module 312, pressing keys control module
314, the second electric signal and the 4th electric signal are passed into server 20 by interchanger 10 and stored.Pass through pressing keys control
Molding block 314, opens recording mode, and treated the second electric signal and the 4th electric signal pass through host signal processing module 312
Transmitting interchanger 10 is simultaneously stored in server 20, and recording file is obtained.And the software mould on server 20 can be passed through
Block carries out classification and marking processing to recording.
Camera 324 is electrically connected with extension set signal processing module 322, and camera 324 acquires image information, and image is believed
Breath is converted to the 5th electric signal, and the 5th electric signal is passed to after 32 signal processing module of extension set is handled and is sent to host
Signal processing module 312, and server 20 is passed to by interchanger 10.
By taking the booking of station as an example: acquiring the image information of client by camera 324, believe with the identity document that client holds
Breath is compared, and can identify to holder and certificate people, avoids others from stealing certificate and carries out booking.Further, may be used
To pass to server 20, server by host signal processing module 312 and interchanger 10 for after the 5th Electric signal processing
20 communicate to connect with public security identification system, the 5th electric signal can be passed to public security identifying system, to suspect
It is identified, improves the safety of society.
By taking bank's transacting business as an example: acquiring the image information of client, the identity card held with client by camera 324
Part information is compared, and can identify to holder and certificate people, avoids others from stealing certificate and carries out handling for business.Into
One step, server can be passed to by host signal processing module 312 and interchanger 10 by after the 5th Electric signal processing
20, customer information is stored by server 20, a statistics same day can be taken or how many of that month people has handled what business, had more
Few Very Important Person has handled any business, carries out data analysis.
Optionally, Fig. 5 is the pickup angle schematic diagram of host pickup microphone 3131 in host 31 provided in this embodiment.Please
Refering to Fig. 5, distance of first sound generation source apart from host pickup microphone 3131 is 10-150cm, and the second sound generation source is picked up apart from extension set
The distance of sound microphone 3231 is 10-150cm.So that extension set pickup microphone 3231 can accurately collect the voice signal of client,
Reduce influence of the ambient sound to voice of customers.Host pickup microphone 3131 can accurately collect the sound letter of staff
Number, reduce influence of the ambient sound to staff's sound.
The phase of two host pickup microphones 3131 or two extension set pickup microphones 3231 is reached using the sound of different directions
Potential difference enhances the sound of assigned direction, weakens the sound in other directions, acquires audio signal.Pass through host signal processing module
The 312 each host pickup microphones 3131 of control are 30 ° -70 ° to the acquisition angles of the first voice signal, each extension set pickup miaow
The acquisition angles of first 3231 pairs of third voice signals are 30 ° -70 °.By DSP filter by the sound in addition to acquisition angles
It filters out, while the collected voice signal for being 30 ° -70 ° to acquisition angles does gain operation and with phase operation, carries out same phase
Fusion, and be filtered again, a complete audio signal is obtained, the encoded device of audio signal at this time is encoded, and is led to
Conducting wire is crossed to be transmitted mutually between host signal processing module 312 and extension set signal processing module 322.
Further, it after the waveform that sound generation source issues is collected by pickup microphone, is converted into counting by analog signal
Before word signal, this voice signal is a sine wave, although what is heard is the same voice signal, due to 32 He of extension set
All there are at least two pickup microphones on host 31, this signal can generate a phase difference in different distance；In brief,
The collected audio signal of our equipment, is to be composed of the sine wave signal of numerous phase difference in fact, this is also
One process of voice signal encoding and decoding.
Specifically, due to the setting of multiple pickup microphones, there are phase differences for the distance between sound generation source to pickup microphone
Property: the sound that each pickup microphone acquisition sound generation source issues, is not collected in the same time, such as sound generation source is apart from host
31 or 32 1.5 meters of extension set, the time that a pickup microphone collects sound is 0.15 second, another may collect sound
Time be 0.11 second, thus there is temporal otherness, temporal otherness is embodied in, pickup microphone
Working principle is to convert tones into continuous waveform electric signal, such as sine wave, each pickup microphone when collecting sound,
Respective waveform signal will be generated because having differences in time, waveform signal in phase there is also difference, this
It is exactly the phase difference opposite sex.
Formulate the criterion calculation distance in a time cycle: or sound generation source is apart from host 31 or 32 1.5 meters of extension set,
Although the time that multiple pickup microphones collect sound is different, it is generally within the scope of one, such as 0.5 second to 2 seconds
Interior, all pickup microphones all collect the sound of sound generation source sending, therefore according to 0.8 second to 1.6 seconds this time cycle, pick up
Sound microphone collects sound, so that it may think sound generation source apart from 1.5 meters of pickup microphone.
Fixed distance is, for example, 8cm, first pickup microphone between first pickup microphone and second pickup microphone
When collecting sound generation source sound, there is the first acquisition time, second pickup microphone has second when collecting sound generation source sound
There are the time differences for acquisition time, the first acquisition time and the second acquisition time, according to this time difference and the velocity of sound (known ideal sound
Speed is 340m/s), the distance between sound generation source and pickup microphone can be obtained according to " distance=speed * time ", further
Know what angle (i.e. sound source direction) sound generation source and two pickup microphones are respectively at, to enhance assigned direction
Sound weakens the sound in other directions.
More sound pick-ups on coplanar, it is known that maximum distance is the distance between two sound pick-ups at both ends；Sound source exists
When the vertical an angle of 90 degrees sounding of two sound pick-ups, the time difference that signal reaches between S1 and S2 is the smallest, if sounding angle exists
0 degree of angle, then the time that signal reaches S1 will reach the time of S2 earlier than signal, similarly, 180 degree angle when is also two
The collected voice signal time phase difference of pickup microphone is maximum distance；It is most short and 0 degree using 90 degree of voice signal times
Or standard deviation as the signal time difference longest of 180 degree, to calculate voice signal source direction, to enhance assigned direction
Sound weakens the sound in other directions.
Full duplex window talkback device 30, system 1 and its intercommunication method provided in an embodiment of the present invention can pass through host
The setting of pickup microphone 3131 and extension set pickup microphone 3231, enhances the sound of assigned direction, weakens the sound in other directions, makes
The laser propagation effect of sound is more preferable.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of full duplex window talkback device, which is characterized in that including host and extension set, the host include host shell,
Host loudspeaker module, host signal processing module, host sound pick-up module；The extension set includes extension set shell, extension set loudspeaking
Device module, extension set signal processing module and extension set sound pick-up module；
The host sound pick-up module includes at least two for acquiring the host pickup microphone of audio signal, the extension set pickup
Device module includes at least two for acquiring the extension set pickup microphone of audio signal；
The host loudspeaker module and at least two host pickup microphones are electrically connected with the host signal processing module
It connects and is all set in the host shell, the extension set loudspeaker module and at least two extension set pickup microphones are and institute
State extension set signal processing module electrical connection and be all set in the extension set shell, the host signal processing module with described point
The electrical connection of machine signal processing module.
2. full duplex window talkback device according to claim 1, which is characterized in that host shell include host housing and
Host dust cover, when the host housing is placed on horizontal plane, the axis of each host pickup microphone and the level
The angle in face is 0 ° -60 °, and the host dust shroud makes each equal position of host pickup microphone loaded on the host housing
In in the host housing.
3. full duplex window talkback device according to claim 2, which is characterized in that the host further includes by key control
Module, the key control module are electrically connected with host signal processing module, and key control module is set to the host housing.
4. full duplex window talkback device according to claim 1, which is characterized in that the extension set further includes camera,
The camera is electrically connected with the extension set signal processing module, and the camera is set to the extension set shell.
5. a kind of full duplex window talkback system, which is characterized in that including any one of interchanger, server and claim 1-4
The full duplex window talkback device, the host signal processing module exchange mechatronics with described, the interchanger with
The server electrical connection.
6. a kind of intercommunication method of full duplex window talkback system described in claim 5, which is characterized in that including walking as follows
It is rapid:
At least two host pickup microphones acquire the first voice signal simultaneously and first voice signal are converted to the
First electric signal is passed to the host signal processing module and is handled to obtain the second electric signal by one electric signal, will
Second electric signal passes to the extension set loudspeaker module, is restored second electric signal by the extension set loudspeaker module
It is issued at second sound signal and by the extension set loudspeaker module；
At least two extension set pickup microphones acquire third voice signal simultaneously and the third voice signal are converted to
The third electric signal is passed to the extension set signal processing module and is handled to obtain the 4th electric signal by three electric signals, will
4th electric signal passes to the host loudspeaker module, is restored the 4th electric signal by the host loudspeaker module
It is issued at falling tone sound signal and by the host loudspeaker module.
7. intercommunication method according to claim 6, which is characterized in that the first sound generation source is apart from the host pickup microphone
Distance is 10-150cm, and distance of second sound generation source apart from the extension set pickup microphone is 10-150cm.
8. intercommunication method according to claim 6, which is characterized in that each host pickup microphone is to first sound
The acquisition angles of sound signal are 30 ° -70 °, and each extension set pickup microphone is to the acquisition angles of the third voice signal
30 ° -70 °.
9. intercommunication method according to claim 8, which is characterized in that the full duplex window talkback system further includes camera shooting
Head, the camera are electrically connected with the extension set signal processing module；
The camera collection image information, and described image information is converted to the 5th electric signal, by the 5th electric signal
It passes to and is sent to the host signal processing module after the extension set signal processing module is handled and by the friendship
It changes planes and passes to the server.
10. intercommunication method according to claim 8, which is characterized in that the full duplex window talkback system further include by
Key control module, the key control module are electrically connected with host signal processing module, press the key control module, by institute
It states the second electric signal and the 4th electric signal passes to the server by interchanger and stored.
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| CN2018111170451 | 2018-09-25 | ||
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