CN212086427U

CN212086427U - High sampling rate bluetooth voice transmission system

Info

Publication number: CN212086427U
Application number: CN202021035271.8U
Authority: CN
Inventors: 区照华; 王卫竑
Original assignee: Shenzhen Qunyi Technology Co ltd
Current assignee: Shenzhen Qunyi Technology Co ltd
Priority date: 2020-06-08
Filing date: 2020-06-08
Publication date: 2020-12-04
Anticipated expiration: 2030-06-08

Abstract

The utility model discloses a high sampling rate bluetooth voice transfer system, including master and slave unit, master, slave unit adopt same chip, present widely used bluetooth TWS audio amplifier or earphone scheme, and it is that CPU + DSP has the chip of bluetooth 5.0 bimodulus, has abundant peripheral hardware, and Flash programmable is suitable for the extension of other functions except that bluetooth audio amplifier or earphone general function. The invention can solve the problems of high power consumption, poor anti-interference capability and difficult carrying of the traditional wireless pickup equipment, develops new ideas and changes for the wireless pickup equipment, has mature technical scheme of the current Bluetooth TWS and low cost, and is beneficial to the popularization of the wireless pickup equipment to a wider application market.

Description

High sampling rate bluetooth voice transmission system

Technical Field

The utility model relates to a bluetooth technical field specifically is a high sampling rate bluetooth voice transfer system.

Background

At present, there is not the product that bluetooth audio frequency so used in domestic, and the product that transmission was gathered to similar wireless audio frequency is mainly:

the radio frequency of 1.2.4G has the defects of high power consumption and easy interference;

UHF wireless MIC pickup equipment and other pickup equipment have the main defects of high power consumption, low frequency and easy interference.

At present, 2.4G or UHF is mostly adopted in wireless sound pickup equipment, and the main defects are that the power consumption is high and is easy to interfere, and the power consumption is 5 to 8 times of that of Bluetooth equipment and needs 50 to 80 mA. By adopting the Bluetooth scheme, the power consumption can be reduced to be within 10mA, the portability of the equipment is greatly improved, and the Bluetooth adopts a frequency modulation technology and has strong anti-interference capability.

The HFP passageway is walked usually to bluetooth sound pickup equipment of the same type, and sampling frequency is the biggest only 16K, and must have corresponding APP cooperation to use, still can preempt the HFP passageway with system's bluetooth SOC simultaneously, and the communication is unstable.

Present from rapping bar, the support of autodyning all is simple control and shoots, and the long distance of cell-phone camera is shot and is recorded a video and can't realize the pronunciation collection to being shot the object.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a high sampling rate bluetooth voice transmission system to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

a Bluetooth voice transmission system with high sampling rate up to 48K comprises a master device and a slave device, wherein the master device and the slave device adopt the same chip, and the Bluetooth TWS loudspeaker box or earphone scheme is widely applied at present. The main chip comprises a controller, an antenna connected with the controller, an infrared remote controller, a debugging port, a USB2.0 interface, a charging controller, a battery, a key, a loudspeaker, a digital signal processor, a microphone input module, an audio input module, an LED display and other rich peripherals. The master device is used for picking up sound and coding at a high sampling rate, is connected with the slave device through Bluetooth, and can also be connected with mobile devices such as Bluetooth devices of mobile phones and tablets. The master device can separately transmit the speech coding data collected by Mic through Bluetooth A2DP, or mix and code the speech collected by Mic and the background music data transmitted by the mobile device and then transmit the mixed and coded speech to the slave device. Although the same TWS chip is used for the slave device, the function of the slave device is mainly to receive the audio signal transmitted from the master device, decode the audio signal, and output the decoded audio signal to the corresponding device, such as a mobile phone, a tablet, a computer, and various audio devices. The master device and the slave device are connected through Bluetooth.

As a further technical solution of the present invention: the main equipment collects voice through a microphone input module, digital-to-analog conversion with the sampling rate being set from 8K to 48K is carried out, and the clarity of sound reception is ensured through the noise reduction processing of the DSP.

As a further technical solution of the present invention: the main equipment can control the mobile equipment to record the sound and the video by adding a Bluetooth HID protocol, and the defect that self-shooting video does not have remote sound pickup is overcome.

As a further technical solution of the present invention: the audio output objects of the slave devices comprise digital cameras, smart phones, sound boxes, tablet computers, computers and various sound equipment.

Compared with the prior art, the beneficial effects of the utility model are that: the invention can solve the problems of high power consumption, poor anti-interference capability and difficult carrying of the traditional wireless pickup equipment, develops new ideas and changes for the wireless pickup equipment, has mature technical scheme of the current Bluetooth TWS and low cost, and is beneficial to the popularization of the wireless pickup equipment to a wider application market.

Drawings

Fig. 1 is an overall schematic view of the present invention.

Fig. 2 is a block diagram of a master device.

Fig. 3 is a block diagram of a slave device.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, example 1: a Bluetooth voice transmission system with high sampling rate up to 48K comprises a master device and a slave device, wherein the master device and the slave device adopt the same chip, and the Bluetooth TWS loudspeaker box or earphone scheme is widely applied at present. The main chip comprises a controller, an antenna connected with the controller, an infrared remote controller, a debugging port, a USB2.0 interface, a charging controller, a battery, a key, a loudspeaker, a digital signal processor, a microphone input module, an audio input module, an LED display and other rich peripherals. The master device is used for picking up sound and coding at a high sampling rate, is connected with the slave device through Bluetooth, and can also be connected with mobile devices such as Bluetooth devices of mobile phones and tablets. The master device can separately transmit the speech coding data collected by Mic through Bluetooth A2DP, or mix and code the speech collected by Mic and the background music data transmitted by the mobile device and then transmit the mixed and coded speech to the slave device. Although the same TWS chip is used for the slave device, the function of the slave device is mainly to receive the audio signal transmitted from the master device, decode the audio signal, and output the decoded audio signal to the corresponding device, such as a mobile phone, a tablet, a computer, and various audio devices. The master device and the slave device are connected through Bluetooth.

The main device is mainly used for sound pickup, so the noise reduction processing needs to be noticed in both structure and software aspects. According to different application scenes, the design method can be different, and the size of the design method can be larger or smaller. Because the Bluetooth audio power consumption is lower than 10mA, the host can be designed to be very small, can be made into a collar clamp type and directly hung on a collar or a pocket, is convenient to carry, and liberates hands.

The master and slave devices adopt a CPU + DSP Bluetooth 5.0 dual-mode chip, and most TWS (true wireless) Bluetooth sound boxes and Bluetooth earphone schemes in the current market are both in the structure. The master control has abundant peripheral hardware, and DSP can fall the noise to audio signal, and the echo is eliminated to and the audio processing, can provide the collection and the wireless bluetooth transmission of high tone quality.

Bluetooth is a dual mode design of BT5.0, supporting LE in addition to V2.1 + EDR, which transmits audio. As shown in the upper left corner of the figure, the device can be wirelessly connected with Bluetooth devices such as a mobile phone, a tablet, a PC, a Bluetooth dongle and the like through Bluetooth.

The slave device is mainly used for receiving the audio signal transmitted by the master device, decoding the audio signal, and outputting the decoded audio signal to corresponding devices such as a digital camera, a smart phone, a loudspeaker, a tablet, a computer and the like marked on the right side of the figure through an ASRC, a DAC or a PA. The slave device adopts the same chip as the master device, so that the master device and the slave device can conveniently realize the functions of TWS (two way switching) such as interconnection, master-slave switching and the like. Because the bluetooth scheme is low in power consumption, the slave device can be designed to be small, has the same size as a bluetooth headset, and is suitable for being connected to mobile devices such as a mobile phone or a camera.

Embodiment 2, on the basis of embodiment 1, another use form of product is that the master equipment can use alone, avoid the radio frequency like 2.4G, pickup equipment such as UHF's wireless MIC still needs the trouble that a slave unit connects the broadcast equipment, directly connect broadcast equipment such as cell-phone, panel, computer etc. that has the bluetooth through the bluetooth, like a sole bluetooth MIC, the defect is that the speech signal of recording can only pass through the HFP passageway, the speech signal of transmission sampling rate 16K, and many cell-phone APP audios and videos do not support bluetooth HFP pronunciation.

If two masters are used together, the same master-slave effect can be achieved and the master-slave can be switched at will, as with a TWS headset.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A high sampling rate Bluetooth voice transmission system comprises a master device and a slave device, and is characterized in that the master device and the slave device adopt the same CPU + DSP and are provided with a Bluetooth 5.0 dual-mode master chip and a programmable Flash, the master chip comprises a controller, an antenna connected with the controller, an infrared remote controller, a debugging port, a USB2.0 interface, a charging controller, a battery, a key, a loudspeaker, a digital signal processor, a microphone input module, an audio input module and an LED display, and the master device is connected with the slave device through the Bluetooth.

2. The system of claim 1, wherein the host device collects the voice through the microphone input module, performs digital-to-analog conversion with a sampling rate that is settable from 8K to 48K, and performs noise reduction processing with the DSP.

3. The system of claim 2, wherein the audio output objects of the slave device include digital cameras, smart phones, audio devices, tablets and computers.

4. The system of claim 1, wherein the host device is further connected to a handset and a tablet.