CN115333560A

CN115333560A - Bluetooth multi-person talkback noise reduction system

Info

Publication number: CN115333560A
Application number: CN202211114426.0A
Authority: CN
Inventors: 王洪海; 侯成文
Original assignee: Shenzhen Fdc Electronic Co ltd
Current assignee: Shenzhen Fdc Electronic Co ltd
Priority date: 2022-09-14
Filing date: 2022-09-14
Publication date: 2022-11-11

Abstract

The invention provides a Bluetooth multi-person talkback noise reduction system, and relates to the field of wireless talkback systems. This many people of bluetooth system of making an uproar of falling of talkbacking includes a plurality of equipment of talkbacking and a plurality of notch filter, and is a plurality of equipment of talkbacking all includes shell, talkbacking mouthful, button, power mouth, frequency modulation knob, signal receiver, PCB circuit board and megaphone. Through the eq function of cvc software in qcc using a notch filter, adopting a notch method, performing notch processing on the sound with the frequency of 2.55khz, setting the gain to-20 db, reducing the noise, improving the conversation quality, performing preliminary processing on the received and converted signal by an internal noise reduction module, preliminarily filtering the noise signal, improving the definition of the sound, coupling the processed signal to be noisy by a signal coupling module, simultaneously feeding the signal back to a main control module, transmitting the signal to a voice processing module by the main control module, expanding the signal by a loudspeaker, facilitating the playing of the sound, and setting a Bluetooth module to be expanded into an interphone with the Bluetooth function.

Description

Bluetooth multi-person talkback noise reduction system

Technical Field

The invention relates to the field of wireless intercom systems, in particular to a Bluetooth multi-person intercom noise reduction system.

Background

Bluetooth is a wireless connection technology that can wireless connection and communication, can realize closely wireless connection, need not the electric wire and can connect, and traditional intercom system is the dialogue system between resident family and the external visitor, and along with the application of general development, when people converse in the certain distance, because there is not network support or the network does not cover the region, can use the short wireless communication equipment of ultrashort-frequency or the equipment that has wireless intercom system to talkback.

The fidelity of current bluetooth intercom system to sound is not high at the in-process to information transfer, and sound is not clear enough, is difficult to the discernment, and it is great to transmit the noise in more noisy environment simultaneously, and during many people's communication, easy interference packet loss, the conversation can produce the noise, influences the result of use.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a Bluetooth multi-person intercommunication noise reduction system, which solves the problems that the existing Bluetooth intercommunication system has low fidelity to sound in the information transmission process, the sound is not clear enough and is not easy to identify, the transmission noise is large in a noisy environment, and in addition, when a plurality of persons communicate, packet loss is easy to interfere, the communication generates noise, and the use effect is influenced.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: a Bluetooth multi-person talkback noise reduction system comprises a plurality of talkback devices and a plurality of notch filters, wherein each talkback device comprises a shell, a talkback port, a button, a power port, a frequency modulation knob, a signal receiver, a PCB circuit board and a loudspeaker;

the PCB circuit board comprises a main control module, a wireless communication module, a power supply module, a noise reduction module, a signal coupling module, a voice output module, a voice input module, a Bluetooth module, a voice processing module and a signal receiving module, and the talkback equipment is externally connected with a central controller in an electric connection mode.

Preferably, the preceding terminal surface of shell leans on lower extreme department to fix and is provided with the mouth of talkbacking, one side of shell leans on the upper end and leans on the lower extreme to fix respectively and is provided with button and power mouth, the opposite side of shell leans on the fixed frequency modulation knob that is provided with of upside department, the fixed signal receiver that is provided with in up end one side of shell, the fixed PCB circuit board that is provided with of shell internal point department, the inside rear end face of shell leans on the downside to fix and is provided with the megaphone, and is a plurality of notch filter is fixed respectively and is set up in the inside bottom face of a plurality of shells and leans on the upside.

Preferably, the bluetooth module includes BLE bluetooth and ordinary bluetooth, the speech input module includes supplementary input device and microphone, supplementary input device and microphone and speech processing module electric connection.

Preferably, the main control module is in electric wire connection with the wireless communication module, the noise reduction module, the signal coupling module and the signal receiving module, and the voice processing module, the bluetooth module, the voice input module and the voice output module are electrically connected with the main control module.

Preferably, the noise reduction module is electrically connected with the signal coupling module and the notch filter, the signal coupling module is electrically connected with the voice output module, and the voice output module is electrically connected with the loudspeaker.

Preferably, the signal receiving module is externally and electrically connected with a radio station, and the frequency modulation knob is electrically connected with the signal receiving module.

Preferably, the plurality of notch filters are electrically connected with the central controller, and adopt eq function provided by cvc software in qcc to perform notch processing by using a notch method so as to add sound with the frequency of 2.55 khz.

Preferably, a radio frequency signal detection module is arranged in the central controller and is electrically connected with the notch filter.

The working principle is as follows: when the system is used, a signal receiving module of the system is connected with a radio station, a user is enabled to be in a frequency channel with the same frequency by using a frequency modulation knob, the user presses a button to aim at an intercom port to carry out conversation, the intercom port is connected with a microphone and an auxiliary input device and is connected with an internal voice input module, the voice input module is connected with a main control module, a signal source is transmitted to the main control module, the main control module converts a signal to a central controller and then transmits the signal back to the main control module, the signal passes through a noise reduction module, a notch filter and a signal coupling module and then is transmitted to a voice output module, the notch filter carries out gain setting on 2.55khz to-20 db due to the matching of the notch filter and the signal coupling module, so that noise is reduced, conversation experience is improved, and when a radio frequency signal module is set to be less than-80 db, the notch filter is started, influence on normal conversation is avoided, the noise reduction signal passing through the noise reduction module is coupled by the signal coupling module and is fed back to the voice output module to be amplified by a loudspeaker.

(III) advantageous effects

The invention provides a Bluetooth multi-person talkback noise reduction system. The method has the following beneficial effects:

1. the invention provides a Bluetooth multi-person talkback noise reduction system, which is characterized in that a notch filter is used for notching sound with a frequency of 2.55khz by an eq function of cvc software in qcc and adopting a notch method, and the gain of the sound is set to-20 db, so that noise can be reduced, and the communication quality can be improved.

2. The invention provides a Bluetooth multi-person talkback noise reduction system, which can preliminarily process a received and converted signal by arranging a noise reduction module inside and matching a signal coupling module, preliminarily filter a noise signal and improve the definition of sound, the signal coupling module can couple the processed and noise-reduced signal and simultaneously feed the signal back to a main control module, the main control module transmits the signal to a voice processing module, and the signal is expanded by a loudspeaker so as to be convenient for sound broadcasting.

3. The invention provides a Bluetooth multi-person talkback noise reduction system, which can be expanded into an interphone with a Bluetooth function by arranging a Bluetooth module and expanding a special Bluetooth adapter, and all voice communication can be realized through a Bluetooth earphone.

Drawings

FIG. 1 is a schematic diagram of the connection of a PCB circuit board of the present invention;

FIG. 2 is a schematic structural view of the intercom apparatus of the present invention;

FIG. 3 is a schematic diagram of the connection of the Bluetooth module of the present invention;

FIG. 4 is a connection diagram of the voice input module according to the present invention.

Wherein, 1, intercom equipment; 2. a housing; 3. an intercom port; 4. a button; 5. a power port; 6. a frequency modulation knob; 7. a signal receiver; 8. a PCB circuit board; 801. a main control module; 802. a wireless communication module; 803. a power supply module; 804. a noise reduction module; 805. a signal coupling module; 806. a voice output module; 807. a voice input module; 80701. an auxiliary input device; 80702. a microphone; 808. a Bluetooth module; 80801. BLE Bluetooth; 80802. normal Bluetooth; 809. a voice processing module; 810. a signal receiving module; 9. a loudspeaker; 10. a notch filter; 11. a radio station; 12. a central controller.

Detailed Description

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 only a part of the embodiments of the present invention, and not all of the embodiments. 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.

Example (b):

as shown in fig. 1-4, an embodiment of the present invention provides a bluetooth multi-user intercom noise reduction system, including a plurality of intercom devices 1 and a plurality of notch filters 10, where each of the plurality of intercom devices 1 includes a housing 2, an intercom port 3, a button 4, a power port 5, a frequency modulation knob 6, a signal receiver 7, a PCB circuit board 8, and a loudspeaker 9;

the PCB circuit board 8 comprises a main control module 801, a wireless communication module 802, a power module 803, a noise reduction module 804, a signal coupling module 805, a voice output module 806, a voice input module 807, a bluetooth module 808, a voice processing module 809 and a signal receiving module 810, wherein a plurality of intercom devices 1 are externally and electrically connected with the central controller 12, the fm knob 6 is electrically connected with the internal signal receiving module 810, can perform rotation and frequency modulation, and adjust the frequency channel of the frequency of the call, and the internal bluetooth module 808 can be connected with a bluetooth headset for use;

the front end face of the shell 2 is fixedly provided with a talkback port 3 close to the lower end, one side of the shell 2 is fixedly provided with a button 4 and a power supply port 5 close to the upper end and the lower end respectively, the other side of the shell 2 is fixedly provided with a frequency modulation knob 6 close to the upper side, one side of the upper end face of the shell 2 is fixedly provided with a signal receiver 7, a PCB (printed circuit board) 8 is fixedly arranged at the midpoint of the inside of the shell 2, the rear end face of the inside of the shell 2 is fixedly provided with a loudspeaker 9 close to the lower side, a plurality of notch filters 10 are respectively and fixedly arranged at the upper sides of the bottom end faces of the inside of the shells 2, the Bluetooth module 808 comprises BLE Bluetooth 80801 and common Bluetooth 80802, aiming at different Bluetooth versions, the BLE Bluetooth 80801 or the common Bluetooth 80802 can be selected for Bluetooth connection according to the surrounding conditions at the same time, the voice input module 807 comprises an auxiliary input device 80701 and a microphone 80702, the auxiliary input device 80701 and the microphone 80702 are electrically connected with the voice processing module 809, the auxiliary input device 701 inputs the surrounding environment and overlaps with the microphone 80702 to receive the audio signals, thereby eliminating the repeated audio and reducing the noise;

the main control module 801 is in electric wire connection with the wireless communication module 802, the noise reduction module 804, the signal coupling module 805 and the signal receiving module 810, the voice processing module 809, the Bluetooth module 808, the voice input module 807 and the voice output module 806 are electrically connected with the main control module 801, the noise reduction module 804 is electrically connected with the signal coupling module 805 and the notch filter 10, the notch filter 10 performs notch processing on 2.55khz audios, and the gain of the audios is set to-20 db, so that noise is reduced, and conversation experience is improved, the signal coupling module 805 is electrically connected with the voice output module 806, the voice output module 806 is electrically connected with the loudspeaker 9, the signal receiving module 810 is electrically connected with the radio station 11 externally, the frequency modulation knob 6 is electrically connected with the signal receiving module 810, the notch filters 10 are electrically connected with the central controller 12 and adopt the eq function provided by cvc software in qcc to perform notch processing by using a notch method, 2.55khz sounds are additionally arranged, a radio frequency signal detection module is arranged in the central controller 12 and is electrically connected with the notch filter 10, and the notch filter 10 is set to be smaller than db 80, and when the radio frequency detection module is smaller than db 80, and the normal conversation is started.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A bluetooth multi-person intercom noise reduction system comprising a plurality of intercom devices (1) and a plurality of notch filters (10), characterized in that: the plurality of the talkback devices (1) respectively comprise a shell (2), a talkback port (3), a button (4), a power supply port (5), a frequency modulation knob (6), a signal receiver (7), a PCB (printed circuit board) circuit board (8) and a loudspeaker (9);

PCB circuit board (8) include main control module (801), wireless communication module (802), power module (803), fall and make an uproar module (804), signal coupling module (805), pronunciation output module (806), pronunciation input module (807), bluetooth module (808), speech processing module (809) and signal reception module (810), and a plurality of all external electric connection central controller (12) of intercom (1).

2. The bluetooth multi-person intercom noise reduction system according to claim 1, wherein: the preceding terminal surface of shell (2) leans on lower extreme department to fix and is provided with mouth (3) of talkbacking, one side of shell (2) leans on the upper end and leans on the lower extreme fixed button (4) and the power mouth (5) of being provided with respectively, the opposite side of shell (2) leans on upside department fixed frequency modulation knob (6) of being provided with, the fixed signal receiver (7) that is provided with in up end one side of shell (2), the fixed PCB circuit board (8) that is provided with of shell (2) inside mid point department, the inside rear end face of shell (2) leans on the downside to fix and is provided with megaphone (9), and is a plurality of notch filter (10) is fixed respectively to be set up in the inside bottom face of a plurality of shells (2) and leans on the upside.

3. The bluetooth multi-person intercom noise reduction system according to claim 2, wherein: the bluetooth module (808) comprises BLE bluetooth (80801) and ordinary bluetooth (80802), the voice input module (807) comprises an auxiliary input device (80701) and a microphone (80702), and the auxiliary input device (80701) and the microphone (80702) are electrically connected with the voice processing module (809).

4. The bluetooth multi-person intercom noise reduction system according to claim 1, wherein: the main control module (801) is in electric wire connection with the wireless communication module (802), the noise reduction module (804), the signal coupling module (805) and the signal receiving module (810), and the voice processing module (809), the Bluetooth module (808), the voice input module (807) and the voice output module (806) are electrically connected with the main control module (801).

5. The bluetooth multi-person intercom noise reduction system according to claim 1, wherein: the noise reduction module (804) is electrically connected with the signal coupling module (805) and the notch filter (10), the signal coupling module (805) is electrically connected with the voice output module (806), and the voice output module (806) is electrically connected with the loudspeaker (9).

6. The bluetooth multi-person intercom noise reduction system according to claim 1, wherein: the external electric connection of signal receiving module (810) has radio station (11), frequency modulation knob (6) and signal receiving module (810) electric connection.

7. The bluetooth multi-person intercom noise reduction system according to claim 1, wherein: the plurality of notch filters (10) are electrically connected with the central controller (12) and adopt eq functions provided by cvc software in qcc to carry out notch processing by using a notch method.

8. The bluetooth multi-person intercom noise reduction system according to claim 1, wherein: the central controller (12) is internally provided with a radio frequency signal detection module which is electrically connected with the notch filter (10).