CN109151408B - Full-duplex window intercom device, system and intercom method thereof - Google Patents
Full-duplex window intercom device, system and intercom method thereof Download PDFInfo
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- CN109151408B CN109151408B CN201811315727.3A CN201811315727A CN109151408B CN 109151408 B CN109151408 B CN 109151408B CN 201811315727 A CN201811315727 A CN 201811315727A CN 109151408 B CN109151408 B CN 109151408B
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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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Abstract
The invention provides a full-duplex window intercom device, a full-duplex window intercom system and an intercom method thereof, and belongs to the technical field of window intercom. The host pickup module of the full-duplex window intercom device comprises at least two host pickup microphone heads used for collecting audio signals, and the extension pickup module comprises at least two extension pickup microphone heads used for collecting the audio signals. Host computer speaker module and two at least host computer pickup miaow heads all are connected with host computer signal processing module electricity and all set up in the host computer casing, and extension speaker module and two at least extension pickup miaow heads all are connected with extension signal processing module electricity and all set up in the extension casing, and host computer signal processing module is connected with extension signal processing module electricity. The host signal processing module of the intercom system is electrically connected with the switch, and the switch is electrically connected with the server. The talkback method is realized through the talkback system, the pickup microphone heads are arranged inside the main machine and the extension set, and the microphone rod is not required to be arranged outside, so that the structure of the talkback system is more attractive.
Description
Technical Field
The invention relates to the technical field of window talkback, in particular to a full-duplex window talkback device, a full-duplex window talkback system and a full-duplex window talkback method.
Background
Counter windows of banks, hospitals, stations and the like are mostly provided with window intercom devices so as to meet the communication between staff and clients. In the prior art, no matter the analog window intercom device or the digital window intercom device, the indoor unit is provided with an external microphone rod with an adjustable angle.
There are problems: the equipment used by the staff is provided with a microphone rod, the top of the microphone rod needs to be spoken in a close range during communication, and the traditional window talkback is stuck on the window to cause shielding of a certain visual angle and shielding of the microphone rod, so that communication between two parties and image forensics are not facilitated; the sound collected by the sound pickup of the devices used by the external dialog personnel is so extensive that noise, background noise and crowd sound of irrelevant personnel are collected and transmitted to the devices of the staff for playing, which brings great trouble.
Disclosure of Invention
The first objective of the present invention is to provide a full-duplex window intercom device, which can perform effective communication without a microphone rod, so that the structure of the host computer is more beautiful.
The second objective of the present invention is to provide a full-duplex window intercom system, which can perform effective communication without a microphone rod, so as to make the structure of the host more beautiful.
The third objective of the present invention is to provide an intercom method of a full-duplex window intercom system, which can perform effective communication without a microphone boom, so that the structure of the host computer is more beautiful.
Based on the first purpose, the invention is realized by adopting the following technical scheme:
a full-duplex window intercom device comprises a host and an extension, wherein the host comprises a host shell, a host loudspeaker module, a host signal processing module and a host sound pickup module; the extension comprises an extension shell, an extension loudspeaker module, an extension signal processing module and an extension sound pickup module;
the main machine sound pick-up module comprises at least two main machine sound pick-up microphone heads for collecting audio signals, and the extension sound pick-up module comprises at least two extension sound pick-up microphone heads for collecting audio signals;
host computer speaker module and two at least host computer pickup miaow heads all are connected with host computer signal processing module electricity and all set up in the host computer casing, and extension speaker module and two at least extension pickup miaow heads all are connected with extension signal processing module electricity and all set up in the extension casing, and host computer signal processing module is connected with extension signal processing module electricity.
Optionally, in another embodiment of the present invention, the main unit housing includes a main unit housing and a main unit dust cover, when the main unit housing is placed on a horizontal plane, an included angle between an axis of each main unit microphone and the horizontal plane is 0 ° to 60 °, and the main unit dust cover is installed on the main unit housing so that each main unit microphone is located in the main unit housing.
Optionally, in another embodiment of the present invention, the host further includes a key control module, the key control module is electrically connected to the host signal processing module, and the key control module is disposed on the host housing.
Optionally, in another embodiment of the present invention, the extension further includes a camera, the camera is electrically connected to the extension signal processing module, and the camera is disposed in the extension housing.
Based on the second purpose, the invention is realized by adopting the following technical scheme:
a full-duplex window intercom system comprises an exchanger, a server and the full-duplex window intercom device, wherein a host signal processing module is electrically connected with the exchanger, and the exchanger is electrically connected with the server.
Based on the third purpose, the invention is realized by adopting the following technical scheme:
an intercom method of the full-duplex window intercom system comprises the following steps:
the at least two host pickup microphones simultaneously collect first sound signals and convert the first sound signals into first electric signals, the first electric signals are transmitted to the host signal processing module to be processed to obtain second electric signals, the second electric signals are transmitted to the extension loudspeaker modules, and the second electric signals are restored into second sound signals through the extension loudspeaker modules and are sent out through the extension loudspeaker modules;
the at least two extension pickup microphone simultaneously gather the third sound signal and convert the third sound signal into the third signal of telecommunication, transmit the third signal of telecommunication for extension signal processing module and handle and obtain the fourth signal of telecommunication, transmit the fourth signal of telecommunication for host computer speaker module, restore into the fourth sound signal and send through host computer speaker module with the fourth signal of telecommunication through host computer speaker module.
Optionally, in another embodiment of the present invention, the distance between the first sound source and the pickup head of the host is 10 to 150cm, and the distance between the second sound source and the pickup head of the extension is 10 to 150 cm.
Optionally, in another embodiment of the present invention, the collection angle of each main pickup microphone to the first sound signal is 30 ° to 70 °, and the collection angle of each sub-set pickup microphone to the third sound signal is 30 ° to 70 °.
Optionally, in another embodiment of the present invention, the full-duplex window intercom system further includes a camera, and the camera is electrically connected to the extension signal processing module;
the camera collects image information, converts the image information into a fifth electric signal, transmits the fifth electric signal to the extension signal processing module for processing, then transmits the processed signal to the host signal processing module and transmits the processed signal to the server through the switch.
Optionally, in another embodiment of the present invention, the full-duplex window intercom system further includes a key control module, the key control module is electrically connected to the host signal processing module, and the key control module is pressed to transmit the second electrical signal and the fourth electrical signal to the server through the switch for storage.
Compared with the prior art, the full-duplex window intercom device, the full-duplex window intercom system and the intercom method thereof provided by the preferred embodiment of the invention have the beneficial effects that:
through setting up extension pickup miaow head in the extension casing, host computer pickup miaow head sets up in the host computer casing, makes host computer and extension can both gather the sound signal, need not set up the microphone pole outward, and the appearance is more pleasing to the eye. Through two at least pickup miaow heads in the host computer and the branch built-in first sound signal of gathering simultaneously, there is the phase difference in the first sound signal of gathering between two pickup miaow heads, can strengthen the sound of appointed direction, weakens the sound of other directions, makes the transmission effect of sound better.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments are briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without creative efforts, and the protection scope of the present invention also belongs to the protection scope of the present invention.
Fig. 1 is a schematic structural diagram of a full-duplex window intercom system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a host in a full-duplex window intercom system according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an extension in the full-duplex window intercom system according to the embodiment of the present invention;
fig. 4 is a schematic view of an installation structure of a pickup microphone of a host according to an embodiment of the present invention;
fig. 5 is a schematic diagram illustrating a pickup angle of a pickup head of a host according to an embodiment of the present invention.
Icon: 1-full duplex window intercom system; 10-a switch; 20-a server; 30-full duplex window intercom; 31-a host; 32-extension; 311-host speaker module; 312-a host signal processing module; 313-a host pickup module; 314-key control module; 315-network and power interface module; 321-extension speaker module; 322-extension signal processing module; 323-extension sound pickup module; 324-a camera; 3131-pickup microphone of host; 3231-picking up microphone by extension.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
Examples
Fig. 1 is a schematic structural diagram of a full-duplex window intercom system 1 provided in this embodiment. Referring to fig. 1, in the present embodiment, the full-duplex window intercom system 1 includes an exchange 10, a server 20 and a full-duplex window intercom device 30, the full-duplex window intercom device 30 is electrically connected to the exchange 10, and the exchange 10 is electrically connected to the server 20. Alternatively, the full-duplex window intercom device 30 is connected to the switch 10 through a network cable, and the switch 10 is connected to the server 20 through a network cable. Similarly: the full-duplex window intercom device 30 and the switch 10, and the connection between the switch 10 and the server 20 may be through a network, or through wireless WiFi, bluetooth, or through other data lines, as long as the signal transmission is possible.
In this embodiment, a (9-12V) dc power adapter may be selected to supply power to the switch 10, or a dc 12V POE may be used to supply power to the switch 10. In a common mode, when the full-duplex window intercom device 30 adopts an adapter to supply power, the switch 10 adopts the conventional switch 10 to meet the technical requirements; if the POE power supply mode is adopted, the switch 10 will adopt the POE switch 10.
It should be noted that: the server 20 in this embodiment may be a general commercial computer or a professional server 20, and is mainly installed with service software, the service software may classify and mark the stored audio information by means of computer hardware, and by clicking a selection module on the service software, different interfaces for storing the audio files can be accessed, and format conversion of the audio files can be performed.
The recording files of the window talkback are divided into conventional recording and evidence obtaining recording, the files of the evidence obtaining recording are marked with recording time, after the recording files are opened through service software, time point marks of key speaking contents can be checked, the time point marks are directly dragged to the mark points, and the recording contents of the window can be listened. In addition, the server 20 management software also opens protocols to provide audio and video data interfaces to the software systems of other common servers 20.
In this embodiment, the full-duplex window intercom device 30 includes a host 31 and an extension 32. The pickup angle of the full-duplex intercom device can be set through management software of the server 20 or a Web page, and can be preset according to the field environment, wherein the angle setting range is 30-120 degrees. The voice signals collected in the appointed angle range of the directional enhancement extension set 32 are selected by entering a terminal management interface through management software or a Web page, entering a parameter setting interface of the host 31, and preferentially calling the numerical value of the angle range of the parameter setting when the host signal processing module 312 performs operation processing on the voice signals of the extension set 31, wherein if the numerical value is not set, the default angle is 30-70 degrees.
Fig. 2 is a schematic structural diagram of the host 31 in the full-duplex window intercom system 1 provided in this embodiment. Referring to fig. 2, in the present embodiment, the host 31 includes a host housing, a host speaker module 311, a host signal processing module 312, a host microphone module 313 and a key control module 314, and the host speaker module 311, the host microphone module 313, the key control module 314 and the network and power interface module 315 are electrically connected to the host signal processing module 312. The host housing is the mounting base for the other components of the host 31.
In this embodiment, the host housing includes a host housing and a host dust cover, and the host speaker module 311, the host signal processing module 312, the host sound pickup module 313 and the key control module 314 are all disposed on the host housing and are covered on the host housing by the host dust cover, which does not affect the sound pickup effect of the host 31. When in use, the main unit 31 is placed on a desktop indoors for use by a worker.
The host speaker module 311 may be a speaker, and after receiving the voice signal of the extension 32, the host speaker module restores the processed voice information to voice, amplifies the voice and emits the voice, so that the staff can clearly understand the needs of the client and communicate with the client.
The host pickup module 313 includes at least two host pickup heads 3131 for picking up audio signals, and the host pickup module 313 may include two host pickup heads 3131 and a plurality of host pickup heads 3131. The host speaker module 311 and the at least two host pickup heads 3131 are electrically connected to the host signal processing module 312 and are disposed in the host housing.
The pickup microphone 3131 is arranged in the main housing, so that the main housing 31 can collect sound signals, a microphone rod is not required to be arranged outside, and the appearance is more attractive. Through two at least host computer pickup microphone 3131 simultaneous acquisition sound signals in the host computer 31, there is the phase difference in the sound signal of gathering between two host computer pickup microphone 3131, can strengthen the sound of appointed direction, weakens the sound of other directions, makes the transmission effect of sound better.
The host signal processing module 312 is electrically connected to the switch 10, and the switch 10 is electrically connected to the server 20. The host 31 is further provided with a network and power interface module 315, the host signal processing module 312 is electrically connected with the network and power interface module 315, and the network and power interface module 315 is electrically connected with the switch 10 through a network cable and is connected with a power supply to provide electric energy for the whole full-duplex intercom device.
The host speaker module 311, the host microphone module 313, the key control module 314, and the network and power interface module 315 may be connected to the host signal processing module 312 by wires, or may be integrated on a host 31 chip for installation in a host housing.
The host signal processing module 312 includes a plurality of DSP filters, an echo cancellation module, a sound field suppression module, and a codec, the host pickup head 3131 is electrically connected to the sound field suppression module, the sound field suppression module is electrically connected to the echo cancellation module, the echo cancellation module is electrically connected to the plurality of DSP filters in sequence, and the DSP filters are electrically connected to the codec.
After the sound signal is collected by the main pickup microphone 3131 of the main unit 31, the sound signal is converted into an electrical signal by the main pickup microphone 3131, the noise signal is weakened by the sound field suppression module, the echo signal is eliminated by the echo elimination module, the noise signal is eliminated by the multiple sets of DSP filters, the electrical signal of which the main signal is obtained, and the signal is encoded by the codec to complete the signal operation and processing.
The key control module 314 is electrically connected to the host signal processing module 312, and the key control module 314 is disposed on the host housing. By operating the key control module 314, it is possible to record, transmit the electric signal to the server 20 through the switch 10, and store the electric signal output value in the third-party memory.
Fig. 3 is a schematic structural diagram of the extension 32 in the full-duplex window intercom system 1 provided in this embodiment. Referring to fig. 3, in the present embodiment, the extension 32 includes an extension housing, an extension speaker module 321, an extension signal processing module 322, an extension sound pickup module 323, and a camera 324, and the extension speaker module 321, the extension sound pickup module 323, and the camera 324 are electrically connected to the extension signal processing module 322. The extension housing is the mounting base for the other components of the extension 32. The structure of the extension shell is similar to that of the main machine shell, and the volume of the extension shell is smaller than that of the main machine shell.
In this embodiment, the extension housing includes extension housing and extension dust cover, and extension speaker module 321, extension signal processing module 322, extension sound pickup module 323 and camera 324 all set up on extension housing to adorn in extension housing through extension dust cover, do not influence the pickup effect of extension 32, camera 324 exposes the extension dust cover, so that gather customer's image. When in use, the extension 32 is placed on an outdoor desktop so as to be convenient for a customer to use, and the extension 32 is not required to be pasted on glass, so that the installation is more convenient.
The extension speaker module 321 may be a speaker, and after receiving the sound signal of the host 31, the extension speaker module restores the processed sound information into sound and amplifies and emits the sound, so that the client can clearly know the requirement of the staff and communicate with the staff.
Extension sound pick-up module 323 includes at least two extension sound pick-up microphone 3231 for gathering audio signals, and extension sound pick-up module 323 may include two extension sound pick-up microphone 3231 and a plurality of extension sound pick-up microphone 3231. Extension speaker module 321 and two at least extension pickup microphone 3231 all are connected with extension signal processing module 322 electricity and all set up in the extension casing.
Through setting up extension pickup microphone 3231 in the extension casing, make extension 32 can gather the sound signal, need not set up the microphone pole outward, the appearance is more pleasing to the eye. Through two at least extension pickup miaow heads 3231 in the extension 32 gather sound signal simultaneously, there is the phase difference in the sound signal of gathering between two extension pickup miaow heads 3231, can strengthen the sound of appointed direction, weakens the sound of other directions, makes the transmission effect of sound better.
The extension signal processing module 322 is electrically connected to the host signal processing module 312, and the extension signal processing module 322 is electrically connected to the sound field suppression module of the host signal processing module 312. Optionally, the extension signal processing module 322 of the extension 32 is connected with the host signal processing module 312 of the host 31 by a wire, a core wire, or RS485, so as to implement power supply and signal intercommunication between the host 31 and the extension 32.
The principle of the extension signal processing module 322 is the same as that of the host signal processing module 312, but the extension signal processing module 322 performs simple noise reduction and filtering processing, the host signal processing module 312 takes charge of the operation function of the electrical signals of the extension 32, and has a larger host PCB, and the modules of the host 31 are integrated on the host PCB.
Fig. 4 is a schematic view of an installation structure of a pickup head 3131 of the main unit 31 according to this embodiment. Referring to fig. 4, in the present embodiment, when the main unit housing is placed on a horizontal plane and the main unit housing is placed on a desk top in front of a worker, an included angle α between an axis of each main unit pickup head 3131 and the horizontal plane is 0 ° to 60 °, and the main unit dust cap is installed on the main unit housing such that each main unit pickup head 3131 is located in the main unit housing. Correspondingly, when the extension shell is placed on a horizontal plane and the main frame shell is placed on a desktop in front of a client, the included angle alpha between the axis of each extension sound pickup microphone 3231 and the horizontal plane is 0-60 degrees, and the extension dust cover covers the extension shell to enable each extension sound pickup microphone 3231 to be positioned in the extension shell.
In this embodiment, extension 32 is unanimous with the principle that host computer 31 collected the collection sound signal, through the pickup miaow head of this angle of installation to gather sound signal, the sound production source can directly pronounce to the pickup miaow head, and the effect of sound collection is better, avoids gathering the noise.
In addition, camera 324 is connected with extension signal processing module 322 electricity, and camera 324 sets up in the extension casing, can gather customer's image and change image signal into the signal of telecommunication through camera 324, transmits for host computer signal processing module 312, transmits it to server 20 through switch 10 again, can also transmit to server 20 of public security system through server 20 and carry out the image comparison, accurately arrests the criminal suspect of station ticket buying window.
The talkback method of the full-duplex window talkback system 1 comprises the following steps:
the at least two main unit pickup microphone 3131 collect a first sound signal and convert the first sound signal into a first electrical signal, transmit the first electrical signal to the main unit signal processing module 312 for processing to obtain a second electrical signal, transmit the second electrical signal to the extension speaker module 321, and restore the second electrical signal into a second sound signal through the extension speaker module 321 and emit the second sound signal through the extension speaker module 321.
At least two extension pickup microphone 3231 simultaneously gather the third sound signal and convert the third sound signal into the third electric signal, transmit the third electric signal to extension signal processing module 322 and process and obtain the fourth electric signal, transmit the fourth electric signal to host computer speaker module 311, restore the fourth electric signal into the fourth sound signal through host computer speaker module 311 and send out through host computer speaker module 311.
The intercommunication between the main machine 31 and the extension 32 is realized by the method, and the sound signals are collected directly by the extension pickup microphone 3231 and the main machine pickup microphone 3131, so that the use of a microphone rod is avoided, and the outer parts of the main machine 31 and the extension 32 are more attractive.
Further, the key control module 314 is electrically connected to the host signal processing module 312, and when the key control module 314 is pressed, the second electrical signal and the fourth electrical signal are transmitted to the server 20 through the switch 10 for storage. By pressing the key control module 314, the recording mode is started, and the processed second electrical signal and the processed fourth electrical signal are transmitted to the switch 10 through the host signal processing module 312 and stored in the server 20, so as to obtain a recording file. And may classify and tag the audio recordings via a software module on server 20.
The camera 324 is electrically connected to the extension signal processing module 322, and the camera 324 collects image information, converts the image information into a fifth electrical signal, transmits the fifth electrical signal to the extension 32 signal processing module for processing, then transmits the processed signal to the host signal processing module 312, and transmits the processed signal to the server 20 through the switch 10.
Taking station ticket buying as an example: the image information of the client is collected through the camera 324 and is compared with the identity document information held by the client, so that the licensee and the certificate person can be identified, and the situation that others steal the document to purchase tickets is avoided. Further, after the fifth electric signal is processed, the fifth electric signal is transmitted to the server 20 through the host signal processing module 312 and the switch 10, the server 20 is in communication connection with the public security identity recognition system, and the fifth electric signal can be transmitted to the public security recognition system to recognize the criminal suspect, so that the social security is improved.
Taking bank transaction as an example: the image information of the client is collected through the camera 324 and is compared with the identity document information held by the client, so that the certificate holder and the certificate person can be identified, and the problem that other people steal the certificate to transact business is avoided. Further, after the fifth electric signal is processed, the fifth electric signal is transmitted to the server 20 through the host signal processing module 312 and the switch 10, and the server 20 stores the client information, so that the client can count how many people transact what services on the same day or the same month, how many important clients transact what services, and perform data analysis.
Optionally, fig. 5 is a schematic diagram of a sound pickup angle of the main unit sound pickup head 3131 in the main unit 31 according to this embodiment. Referring to fig. 5, the distance from the first sound source to the pickup head 3131 of the main unit is 10-150 cm, and the distance from the second sound source to the pickup head 3231 of the extension is 10-150 cm. So that extension pickup microphone 3231 can accurately collect the sound signal of the client, and reduce the influence of the environmental sound on the sound of the client. The pickup head 3131 of the host can accurately collect the sound signals of the staff, and the influence of the environmental sound on the sound of the staff is reduced.
The phase difference of the sound reaching the two main pickup heads 3131 or the two extension pickup heads 3231 in different directions is used to enhance the sound in the designated direction, weaken the sound in other directions and collect audio signals. The collection angle of each main microphone 3131 to the first sound signal is controlled by the main signal processing module 312 to be 30-70 °, and the collection angle of each extension microphone 3231 to the third sound signal is controlled to be 30-70 °. The sound except the collection angle is filtered by the DSP filter, meanwhile, the collected sound signals with the collection angle of 30-70 degrees are subjected to gain operation and in-phase operation, in-phase fusion is carried out, filtering is carried out again, a complete audio signal is obtained, the audio signal at the moment is encoded by an encoder and is mutually transmitted between the host signal processing module 312 and the extension signal processing module 322 through a lead.
Furthermore, after the waveform emitted by the sound source is collected by the sound pickup microphone and before the waveform is converted into a digital signal through an analog signal, the sound signal is a sine wave, although the same sound signal is heard, because the extension 32 and the host 31 both have at least two sound pickup microphones, the signal can generate a phase difference at different distances; in short, an audio signal collected by the device is actually formed by combining sine wave signals with infinite phase differences, which is also a process of encoding and decoding sound signals.
Specifically, due to the arrangement of the plurality of pickup heads, there is phase difference in the distance between the sound source and the pickup head: each microphone collects the sound emitted by the sound source, not at the same time, for example, the sound source is spaced from the host 31 or the extension 321.5 meters, the time for collecting the sound by one microphone is 0.15 seconds, and the time for collecting the sound by another microphone is 0.11 seconds, so that the time difference exists.
Establishing a standard calculation distance in a time period: or the sound source is spaced from the main unit 31 or the extension 321.5 m, although the sound sources are different in time of collecting sound by the plurality of microphone heads, the sound sources are generally within a range, for example, within 0.5 second to 2 seconds, and all the microphone heads collect sound from the sound sources, so that according to the time period of 0.8 second to 1.6 seconds, the microphone heads collect sound, and the sound sources can be considered to be spaced from the microphone heads by 1.5 m.
The fixed distance between the first pickup head and the second pickup head is, for example, 8cm, the first pickup head has a first collection time when collecting sound of a sound source, the second pickup head has a second collection time when collecting sound of the sound source, a time difference exists between the first collection time and the second collection time, and according to the time difference and a sound velocity (an ideal sound velocity is known to be 340m/s), the distance between the sound source and the pickup head can be obtained according to the distance-velocity time, and an angle (i.e., a sound source direction) at which the sound source and the two pickup heads are respectively positioned is further known, so that the sound in the designated direction is enhanced, and the sound in other directions is weakened.
A plurality of sound pickups on the same plane, and the known farthest distance is the distance between two sound pickups at two ends; when the sound source sounds at an angle of 90 degrees perpendicularly to the two sound pickups, the time difference between the arrival time of the signal at S1 and the arrival time of the signal at S2 are minimum, if the sound angle is 0 degree, the arrival time of the signal at S1 is earlier than the arrival time of the signal at S2, and similarly, the time phase difference between the sound signals collected by the two sound pickup microphones is the maximum distance when the sound angle is 180 degrees; the standard deviation of the shortest 90-degree sound signal time and the longest 0-degree or 180-degree signal time difference is used for calculating the direction of the sound signal source, so that the sound in the specified direction is enhanced, and the sound in other directions is weakened.
The full-duplex window intercom device 30, the system 1 and the intercom method thereof provided by the embodiment of the invention can enhance the sound in the designated direction and weaken the sound in other directions by the arrangement of the host pickup microphone 3131 and the extension pickup microphone 3231, so that the sound transmission effect is better.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A full-duplex window intercom device is characterized by comprising a host and extension sets, wherein the host comprises a host shell, a host loudspeaker module, a host signal processing module and a host sound pickup module; the extension comprises an extension shell, an extension loudspeaker module, an extension signal processing module and an extension sound pickup module;
the main machine sound pick-up module comprises two main machine sound pick-up microphone heads for collecting audio signals, and the extension sound pick-up module comprises two extension sound pick-up microphone heads for collecting the audio signals;
the host loudspeaker module and the two host pickup microphones are electrically connected with the host signal processing module and are arranged in the host shell, and sound signals which are simultaneously collected by the two host pickup microphones have phase difference, so that the sound in a specified direction can be enhanced, and the sound in other directions can be weakened; the extension loudspeaker module and the two extension sound pickup microphone are electrically connected with the extension signal processing module and are arranged in the extension shell, and sound signals which are simultaneously collected by the two extension sound pickup microphone have phase difference, so that the sound in a specified direction can be enhanced, and the sound in other directions can be weakened; and the host signal processing module is electrically connected with the extension signal processing modules.
2. The full-duplex window intercom device according to claim 1, wherein the main housing includes a main housing shell and a main housing dust cover, an axis of each said main housing pickup head being at an angle of 0 ° to 60 ° to a horizontal plane when said main housing shell is placed on said horizontal plane, said main housing dust cover being attached to said main housing shell such that each said main housing pickup head is located within said main housing shell.
3. The full-duplex window intercom device according to claim 2, wherein the host further comprises a key control module, the key control module is electrically connected with the host signal processing module, and the key control module is disposed on the host housing.
4. The full-duplex window intercom device according to claim 1, wherein said extension further comprises a camera, said camera being electrically connected to said extension signal processing module, said camera being disposed in said extension housing.
5. A full-duplex window intercom system comprising a switch, a server, and the full-duplex window intercom device of any one of claims 1-4, said host signal processing module being electrically connected to said switch, said switch being electrically connected to said server.
6. An intercom method of the full-duplex window intercom system of claim 5 comprising the steps of:
the two host pickup microphones simultaneously collect a first sound signal and convert the first sound signal into a first electric signal, the first electric signal is transmitted to the host signal processing module to be processed to obtain a second electric signal, the second electric signal is transmitted to the extension loudspeaker modules, and the second electric signal is restored into a second sound signal through the extension loudspeaker modules and is sent out through the extension loudspeaker modules;
the two extension pickup microphone heads simultaneously collect a third sound signal and convert the third sound signal into a third electric signal, the third electric signal is transmitted to the extension signal processing module to be processed to obtain a fourth electric signal, the fourth electric signal is transmitted to the host speaker module, and the fourth electric signal is reduced into a fourth sound signal by the host speaker module and is sent out by the host speaker module.
7. The intercom method according to claim 6, wherein the first sound source is located at a distance of 10-150 cm from the main microphone head and the second sound source is located at a distance of 10-150 cm from the extension microphone head.
8. The intercom method according to claim 6, wherein the collection angle of each said master sound-collecting microphone to said first sound signal is 30 ° -70 °, and the collection angle of each said slave sound-collecting microphone to said third sound signal is 30 ° -70 °.
9. The intercom method according to claim 8, wherein said full-duplex window intercom system further comprises a camera, said camera being electrically connected to said extension signal processing module;
the camera collects image information, converts the image information into a fifth electric signal, transmits the fifth electric signal to the extension signal processing module for processing, then transmits the processed signal to the host signal processing module and transmits the processed signal to the server through the switch.
10. The intercom method according to claim 8, wherein the full-duplex window intercom system further comprises a key control module, the key control module is electrically connected with the host signal processing module, and the second electrical signal and the fourth electrical signal are transmitted to the server through the switch for storage by pressing the key control module.
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| US20160366528A1 (en) * | 2015-06-11 | 2016-12-15 | Sony Mobile Communications, Inc. | Communication system, audio server, and method for operating a communication system |
| CN204906560U (en) * | 2015-08-20 | 2015-12-23 | 深圳市达威思智能科技有限公司 | Single equipment double copies array microphone conference system |
| CN106303761B (en) * | 2016-08-31 | 2019-06-11 | 长沙世邦通信技术有限公司 | A kind of window talkback system and intercommunication method |
| CN106507038B (en) * | 2016-10-09 | 2024-02-20 | 来邦科技股份公司 | Full duplex window intercom system |
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