CN219268842U - Multipath input wireless digital transmitting device - Google Patents

Multipath input wireless digital transmitting device Download PDF

Info

Publication number
CN219268842U
CN219268842U CN202223409987.1U CN202223409987U CN219268842U CN 219268842 U CN219268842 U CN 219268842U CN 202223409987 U CN202223409987 U CN 202223409987U CN 219268842 U CN219268842 U CN 219268842U
Authority
CN
China
Prior art keywords
module
input
audio
digital
dsp
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202223409987.1U
Other languages
Chinese (zh)
Inventor
王荣静
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Lanke Xuntong Technology Co ltd
Original Assignee
Shenzhen Lanke Xuntong Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen Lanke Xuntong Technology Co ltd filed Critical Shenzhen Lanke Xuntong Technology Co ltd
Priority to CN202223409987.1U priority Critical patent/CN219268842U/en
Application granted granted Critical
Publication of CN219268842U publication Critical patent/CN219268842U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Landscapes

  • Circuit For Audible Band Transducer (AREA)

Abstract

The utility model is applicable to the field of wireless transmitting devices, and provides a multipath input wireless digital transmitting device, which comprises: the DSP and the central processing module are used for processing the received audio data and controlling the device; the audio input module group is used for receiving the audio signals of the intelligent terminal and sending the audio signals to the processing module; the multi-path composite switch is used for switching the audio input sources; the external storage module is used for storing audio data, and the DSP and the central processing module acquire the audio data from the external storage module; the external input port is used for connecting the DSP and the central processing module with an external intelligent terminal to acquire audio data; and the low-power Bluetooth transmitting module is used for transmitting the received audio signals to the receiving equipment in a low-power Bluetooth audio format. The utility model can broadcast the audio data stream to the receiving equipment, does not need to be connected with the receiving equipment, has no limitation on the connection mode, can support various input modes, and is suitable for different intelligent terminals, thereby expanding the diversity of application scenes.

Description

Multipath input wireless digital transmitting device
Technical Field
The utility model belongs to the field of wireless transmitting devices, and particularly relates to a multipath input wireless digital transmitting device.
Background
With the development of wireless technology, both transmission rate and transmission distance are significantly improved, so that the reliability, audio quality and transmission timeliness of an audio stream can meet the requirements of more and more complex application scenarios, such as the use scenarios of one transmitting end and multiple receiving ends, by transmitting voice data in a wireless manner. After bluetooth 5.2, the bluetooth alliance has introduced a new generation of bluetooth Audio technology standard, bluetooth low energy Audio (LE Audio). The new characteristics of bluetooth low energy audio include: multiple stream audio, low complexity communication codec (LC 3), broadcast audio, these new features will effectively improve sound quality and reduce transmission delay and power consumption, bringing connectable synchronous transmission (CIS) and broadcast synchronous transmission (BIS) applications into the market, greatly enriching audio application scenarios.
The traditional audio transmission modes include: the traditional sound box equipment is connected with the audio sending device, the mode is a wired transmission mode, and even more, a plurality of high-grade sound boxes only adopt professional connecting wires in order to ensure sound quality lossless transmission. When the transmission mode is applied to some conference rooms and open area scenes, in order to ensure that each corner of the open area can be heard, an audio transmitting device (such as a player, usually only one player) needs to be provided with a plurality of receiving sound box devices, and in this case, the wired connection mode can bring complicated wiring trouble, so that the limitation on the application scenes is too high, and the audio source is too single, so that the diversified expansion of the application scenes is not facilitated.
Disclosure of Invention
The utility model provides a multipath input wireless digital transmitting device, which aims to solve the problems that the limitation of the existing audio transmission mode is too high and the application scene is not easy to expand in a diversified way when the existing audio transmission mode is applied to a specific place.
The utility model is realized in that a multi-input wireless digital transmitting device comprises:
the DSP and the central processing module are used for processing the received audio data and arranging logic control of the device;
the audio input module group is used for receiving an audio signal of the intelligent terminal and sending the audio signal to the DSP and the central processing module for sending, wherein the audio signal comprises an analog audio signal and a digital audio signal;
the multi-path composite switch is connected with the audio input module, the DSP and the central processing module and is used for switching audio input sources;
the external storage module is used for storing audio data and is connected with the DSP and the central processing module, and the DSP and the central processing module acquire the audio data from the external storage module;
the external input port is connected with the DSP and the central processing module and is used for connecting the DSP and the central processing module with an external intelligent terminal to acquire audio data;
and the low-power consumption Bluetooth transmitting module is connected with the DSP and the central processing module, receives the audio signal and transmits the audio signal to receiving equipment in a low-power consumption Bluetooth audio format.
Further, the audio input module group comprises an audio ADC input module, a digital audio input module and a wireless digital input module, and the audio ADC, the digital audio input module and the wireless digital input module are respectively connected with the multi-path compound switch.
Further, the audio ADC input module comprises an ADC digital-to-analog converter and an analog port, wherein the ADC digital-to-analog converter is connected with the multiplexing switch, and the analog port is used for being connected with an external intelligent terminal.
Further, the digital audio input module comprises a digital audio interface transmitter and a digital port, wherein the digital audio interface transmitter is connected with the multi-path compound switch, and the digital port is used for being connected with an external intelligent terminal.
Further, the wireless digital input module is one or any combination of a plurality of classic Bluetooth modules, low-power Bluetooth modules, WIFI modules and 2.4G modules.
Further, the DSP and the central processing module are integrated with the low-power consumption Bluetooth transmitting module.
Further, the external input port is one or any combination of a plurality of USB ports and TYPE-C, lightning interfaces.
Further, the DSP and the central processing module are connected with the multi-path compound switch, and the multi-path compound switch and the audio input module group by adopting digital interfaces.
Further, the multipath input wireless digital transmitting device further comprises an antenna module, the antenna module is connected with the low-power consumption Bluetooth transmitting module and used for receiving and transmitting wireless signals, the low-power consumption Bluetooth transmitting module adopts a wireless multi-protocol SOC chip and supports transmission of various wireless protocols, the wireless transmission protocol is a 2.4G private protocol or a low-power consumption Bluetooth protocol, and an encryption module is arranged in the wireless multi-protocol SOC chip and used for setting passwords.
Further, the multi-input wireless transmitting device further includes:
the shell is provided with a hollow accommodating cavity, an avoidance hole is formed in the outer wall of the shell, and the avoidance hole is communicated with the accommodating cavity;
the PCB is arranged on the PCB, a read slot for the external storage module to be inserted is further formed in the PCB, the PCB is positioned in the accommodating cavity, and the connecting port of the audio input module group, the read slot and the external input port extend out of the shell from the avoidance hole.
The utility model has the beneficial effects that by adopting the low-power consumption Bluetooth transmitting device as the transmitting end, the BIS can be used for starting the broadcasting audio function, one or more synchronous data streams can be broadcasted to all receiving devices in a range without being connected with the receiving devices, so that the connection between the receiving devices and the low-power consumption Bluetooth transmitting module is not limited, one transmitting end corresponds to a plurality of receiving devices, in addition, an audio input module group is arranged for receiving analog signals and digital signals of the intelligent terminal, a multi-path composite switch is used for switching audio input channels according to different audio input sources, an external storage module and an external input port are also arranged for realizing multi-path input, multiple input modes can be supported, and different intelligent terminals are adapted, so that the application scene is diversified.
Drawings
Fig. 1 is an application scenario diagram of a multi-input wireless digital transmitting device provided by the utility model;
fig. 2 is a block diagram of a multi-input wireless digital transmitting device according to the present utility model;
fig. 3 is a schematic structural diagram of an audio ADC input module of a multi-input wireless digital transmitting device according to the present utility model;
fig. 4 is a schematic structural diagram of a digital audio input module of a multi-input wireless digital transmitting device according to the present utility model.
Reference numerals illustrate:
1. a DSP and a central processing module; 2. an audio input module group; 21. an audio ADC input module; 211. an ADC digital-to-analog converter; 212. an analog port; 22. a digital audio input module; 221. a digital audio interface transmitter; 222. a digital port; 23. a wireless digital input module; 3. a multi-way compound switch; 4. an external storage module; 5. an external input port; 6. a low-power consumption Bluetooth transmitting module; 100. multipath input wireless digital transmitting device; 200. an intelligent terminal; 300. a receiving device.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
Referring to fig. 1 and 2, a multi-input wireless digital transmitting device 100 according to an embodiment of the present utility model includes a DSP and central processing module 1, an audio input module group 2, a multi-channel composite switch 3, an external storage module 4, an external input port 5, and a bluetooth low energy transmitting module 6. The DSP and central processing module 1 is used for processing received audio data and device arrangement logic control, the audio input module group 2 is used for receiving audio signals of the intelligent terminal 200 and sending the audio signals to the DSP and central processing module 1, the audio signals comprise analog audio signals and digital audio signals, the multiplexing switch 3 is connected with the audio input module and the DSP and central processing module 1 and used for switching audio input sources, the external storage module 4 is used for storing the audio data and is connected with the DSP and the central processing module 1, the DSP and the central processing module 1 acquire the audio data from the external storage module 4 through a digital interface, the external input port 5 is connected with the DSP and the central processing module 1 and used for connecting the DSP and the central processing module 1 with the external intelligent terminal 200 to acquire the audio data, the low-power Bluetooth transmitting module 6 is connected with the DSP and the central processing module 1 and receives the audio signals and sends the audio signals to the receiving device 300 in a low-power Bluetooth audio format, and the low-power Bluetooth audio format comprises a connection mode sending mode and a broadcasting mode sending mode.
According to the embodiment of the utility model, by adopting the low-power-consumption Bluetooth transmitting device as the transmitting end, the BIS can be used for starting the broadcasting audio function, one or more synchronous data streams can be broadcast to all receiving devices 300 within the range, the receiving devices 300 do not need to be connected with the receiving devices 300, the connection between the receiving devices 300 and the low-power-consumption Bluetooth transmitting module 6 is not limited, one transmitting end corresponds to a plurality of receiving devices 300, in addition, the audio input module group 2 is used for receiving analog signals and digital signals of the intelligent terminal 200, the multiplexing switch 3 is used for switching audio input channels according to different audio inputs, the external storage module 4 and the external input port 5 are also arranged for realizing multiplexing input, and various input modes can be supported and different intelligent terminals 200 are adapted, so that the diversity of application scenes is expanded.
For example, music is played on a smart phone, audio data is processed into bluetooth low energy audio by the multi-input wireless digital transmitting apparatus 100, the multi-input wireless digital transmitting apparatus 100 supports a broadcast synchronous transmission (Broadcast Isochronous Streams, BIS) audio transmission mode, and the plurality of receiving devices 300 (bluetooth low energy peripherals, such as bluetooth speaker, bluetooth headset, bluetooth hearing aid device, etc.) can receive music played from the smart terminal at the same time without being connected to the multi-input wireless digital transmitting apparatus 100. The LC3 decoding characteristic based on the low-power consumption Bluetooth transmitting module 6 enables a user to have higher tone quality, lower power consumption and lower delay experience. In addition, broadcasting audio will aid the new generation of hearing aid systems, will be easier to deploy, will be less costly, and will provide higher audio quality and greater privacy.
Specifically, taking a broadcasting form as an example, in an application scene of an open area, such as a public place like a waiting room, a gym, a museum, a conference hall, a cinema and the like, the audio data is transmitted through the audio transmitting end, so that a larger range can be covered, a wearer of the hearing aid device can hear the sound from the audio transmitting end without additional devices, sitting at any corner within an effective distance of audio transmission. For example, the bus arrival time can be broadcasted for the groups with weaker hearing or eyesight by broadcasting audio at the bus station; different frequency bands can be selected, and audio broadcasting of the different frequency bands can be selectively received. For example, a movie theater may transmit native language audio for different viewers while providing audio selections in different languages for other viewers when playing a movie.
Further, the audio input module group 2 includes an audio ADC input module 21, a digital audio input module 22 and a wireless digital input module 23, and the audio ADC input module 21, the digital audio input module 22 and the wireless digital input module 23 are respectively connected to the multiplexing switch 3. In this way, the audio ADC input module 21, the digital audio input module 22 and the wireless digital input module 23 are respectively configured to receive an analog audio signal or a digital audio signal, and the analog audio signal or the digital audio signal is sent to the DSP and the central processing module 1 through the multiplexing switch 3.
Referring to fig. 3, specifically, the audio ADC input module 21 is configured to receive an analog signal of the intelligent terminal 200, the audio ADC input module 21 includes an ADC digital-to-analog converter 211 and an analog port 212, the ADC digital-to-analog converter 211 is connected to the multiplexing switch 3, the analog port 212 is configured to be connected to the external intelligent terminal 200, and is configured to transmit an analog audio signal, and the ADC digital-to-analog converter 211 converts the analog audio signal received from the intelligent terminal 200 into a digital audio signal and outputs the digital audio signal to the DSP and the central processor through the multiplexing switch 3. Wherein the analog ports include, but are not limited to RCA ports, 3.5mm audio interfaces.
Referring to fig. 4, specifically, the digital audio input module 22 is configured to receive a digital audio signal of the intelligent terminal 200, the digital audio input module 22 includes a digital audio interface transmitter 221 and a digital port 222, the digital audio interface transmitter 221 is connected to the multiplexing switch 3, the digital port 222 is configured to be connected to the external intelligent terminal 200, the digital audio interface transmitter 221 receives the digital audio signal of the external intelligent terminal 200, and after the data is encoded, the data is output to the DSP and the central processing module 1 through the multiplexing switch 3. Among these, the digital ports 222 include Coaxial digital ports (coax), which are audio standard digital interfaces, and fiber optic digital ports (Sony/Philips Digital InterFace). Optical fiber digital ports (Optical) also belong to the audio standard digital interface of the SPDIF (Sony/Philips Digital InterFace) standard, transmitting digital signals in the form of Optical pulses.
Specifically, the wireless digital input module 23 is one or any combination of several of a classical bluetooth module, a bluetooth low energy module, a WIFI module, and a 2.4G module, and mainly receives a digital audio signal of the intelligent terminal 200 in a wireless manner.
Further, the external input port 5 is one or any combination of several of a USB port and TYPE-C, lightning, so as to adapt to different intelligent terminals. Through the external input port 5, it is possible to communicatively connect with an external smart terminal 200 having a different external input port 5 to acquire audio data. Specifically, the USB port may be selected from USB 2.0, USB3.0, or higher versions.
Further, the DSP and central processing module 1 are connected with the multiplexing switch 3, and the multiplexing switch 3 is connected with the audio input module group 2 by digital interfaces, where the digital interfaces include but are not limited to an I2S interface, an I2S (Inter-IC Sound) bus, also called an integrated circuit built-in audio bus, and are a bus standard formulated by philips for audio data transmission between digital audio devices.
The DSP and central processing module 1 is used for the logic control and audio data processing of the operation of the multipath input wireless digital device, and the multipath composite switch 3 controls the logic level of the input switch through software so as to realize the switching of the audio channel. For example, when the intelligent terminal 200 and the audio input module group 2 (one of the above-mentioned audio ADC input module 21, digital audio input module 22, or wireless digital input module 23) are connected, the multiplexing switch 3 receives a predetermined level signal, and selects to turn on the circuit connected to the corresponding input module, thereby outputting corresponding audio data.
Further, the DSP and central processing module 1 is integrally provided with the bluetooth low energy transmitting module 6. Thus, the system integration of the multi-input wireless digital transmission device 100 can be improved, and the structure of the device can be simplified. The low-power consumption Bluetooth transmitting module 6 can be an SOC chip, can select, but is not limited to nRF5340, integrates a high-performance processor and a low-power consumption radio frequency transceiver into a whole, supports multiple protocols, supports low-power consumption Bluetooth 5.2 and above versions, and can support a low-power consumption Bluetooth Audio (LE Audio) protocol.
Specifically, the multi-input wireless digital transmitting device 100 further includes an antenna module, where the antenna module is connected to the bluetooth low energy transmitting module 6 and is used for receiving and transmitting wireless signals, the bluetooth low energy transmitting module 6 adopts a wireless multi-protocol SOC chip to support transmission of multiple wireless protocols, and the wireless transmission protocol is a 2.4G private protocol or a bluetooth low energy protocol. In addition, the wireless multi-protocol SOC chip is internally provided with an encryption module, is used for setting passwords, integrates the safety functions of ARM CryptoCell-312 safety key storage and the like, and can provide the highest level of safety. The operating principle is to accelerate the hardware of the general internet encryption standard, and simultaneously provide hardware isolation within the system for trusted software by creating a secure code execution area and a non-secure code execution area on a single kernel. The password may be set by the encryption module. The broadcast audio supports broadcast data encryption, and after a user selects the broadcast audio to be connected, the user needs to share/input a password to acquire the broadcast audio data, so that the security of data transmission is improved, the broadcast can be opened or closed, and the user needs to input a correct password to join.
Further, the antenna module and the bluetooth low energy transmitting module 6 may be separately or integrally provided, which is not limited herein.
Further, the multi-path input wireless digital transmitting device 100 further comprises a housing (not shown in the figure) and a PCB board (not shown in the figure), the housing has a hollow accommodating cavity, the outer wall of the housing is provided with an avoidance hole, the avoidance hole is communicated with the accommodating cavity, the DSP and the central processing module 1, the audio input module group 2, the multi-path composite switch 3 and the external input port 5 are all arranged on the PCB board, the PCB board is further provided with a card reading slot for the external storage module 4 to be inserted, the PCB board is positioned in the accommodating cavity, and the connection port, the card reading slot and the external input port 5 of the audio input module group 2 extend out of the housing from the avoidance hole. The housing is used to protect the multiple input wireless digital transmitting device 100, and the PCB board provides a mounting carrier for the module components of the multiple input wireless digital transmitting device 100 and circuit connections between the module components.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (10)

1. A multiple-input wireless digital transmitting apparatus, comprising:
the DSP and the central processing module are used for processing the received audio data and arranging logic control of the device;
the audio input module group is used for receiving an audio signal of the intelligent terminal and sending the audio signal to the DSP and the central processing module, wherein the audio signal comprises an analog audio signal and a digital audio signal;
the multi-path composite switch is connected with the audio input module, the DSP and the central processing module and is used for switching audio input sources;
the external storage module is used for storing audio data and is connected with the DSP and the central processing module, and the DSP and the central processing module acquire the audio data from the external storage module;
the external input port is connected with the DSP and the central processing module and is used for connecting the DSP and the central processing module with an external intelligent terminal to acquire audio data;
and the low-power consumption Bluetooth transmitting module is connected with the DSP and the central processing module, receives the audio signal and transmits the audio signal to receiving equipment in a low-power consumption Bluetooth audio format.
2. The multiple-input wireless digital transmitting apparatus of claim 1, wherein the set of audio input modules comprises an audio ADC input module, a digital audio input module, and a wireless digital input module, each of the audio ADC input module, the digital audio input module, and the wireless digital input module being connected to the multiple-input composite switch.
3. The multiple-input wireless digital transmitting apparatus of claim 2, wherein the audio ADC input module comprises an ADC digital-to-analog converter connected to the multiple-input composite switch and an analog port for connection to an external smart terminal.
4. The multiple-input wireless digital transmitting apparatus of claim 2, wherein the digital audio input module comprises a digital audio interface transmitter and a digital port, the digital audio interface transmitter being coupled to the multiple-input wireless digital transmitting apparatus, the digital port being for coupling to an external smart terminal.
5. The multiple-input wireless digital transmitting apparatus of claim 2, wherein the wireless digital input module is one or any combination of a classical bluetooth module, a bluetooth low energy module, a WIFI module, or a 2.4G module.
6. The multiple-input wireless digital transmitting device according to claim 1, wherein the DSP and the central processing module are integrated with the bluetooth low energy transmitting module.
7. The multiple-input wireless digital transmitting apparatus of claim 1, wherein the external input port is one or any combination of a USB port and a TYPE-C, lightning interface.
8. The multiple-input wireless digital transmitting device according to claim 1, wherein the DSP and central processing module are connected to the multiple-input multiple-switch, the multiple-input multiple-switch and the audio input module group by digital interfaces.
9. The multi-input wireless digital transmitting device according to claim 1, further comprising an antenna module, wherein the antenna module is connected with a low-power consumption bluetooth transmitting module for receiving and transmitting wireless signals, the low-power consumption bluetooth transmitting module adopts a wireless multi-protocol SOC chip to support transmission of multiple wireless protocols, the wireless transmission protocol is a 2.4G private protocol or a low-power consumption bluetooth protocol, and an encryption module is built in the wireless multi-protocol SOC chip for setting passwords.
10. The multiple-input wireless digital transmitting apparatus as claimed in any one of claims 1 to 9, wherein the multiple-input wireless digital transmitting apparatus further comprises:
the shell is provided with a hollow accommodating cavity, an avoidance hole is formed in the outer wall of the shell, and the avoidance hole is communicated with the accommodating cavity;
the PCB is arranged on the PCB, a read slot for the external storage module to be inserted is further formed in the PCB, the PCB is positioned in the accommodating cavity, and the connecting port of the audio input module group, the read slot and the external input port extend out of the shell from the avoidance hole.
CN202223409987.1U 2022-12-16 2022-12-16 Multipath input wireless digital transmitting device Active CN219268842U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202223409987.1U CN219268842U (en) 2022-12-16 2022-12-16 Multipath input wireless digital transmitting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202223409987.1U CN219268842U (en) 2022-12-16 2022-12-16 Multipath input wireless digital transmitting device

Publications (1)

Publication Number Publication Date
CN219268842U true CN219268842U (en) 2023-06-27

Family

ID=86870144

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202223409987.1U Active CN219268842U (en) 2022-12-16 2022-12-16 Multipath input wireless digital transmitting device

Country Status (1)

Country Link
CN (1) CN219268842U (en)

Similar Documents

Publication Publication Date Title
KR20040045841A (en) Modular headset for cellphone or MP3 player
CN103747391A (en) Sound box with dual-wireless mode and control method thereof
US20230370772A1 (en) Bluetooth audio broadcasting system and related multi-member bluetooth device
CN213339098U (en) Wireless transmitting device
CN111970613A (en) Wireless transmitting device, control method and display device
US11709651B2 (en) Bluetooth audio broadcasting system and related multi-member Bluetooth device supporting Bluetooth low energy audio broadcasting operations and capable of synchronously adjusting audio volume
TW202226855A (en) Bluetooth audio broadcasting system and related multi-member bluetooth device supporting bluetooth low energy audio broadcasting operations and capable of synchronously adjusting audio volume
CN219268842U (en) Multipath input wireless digital transmitting device
CN108989918B (en) Audio processing device and audio playing system
CN207304893U (en) Multi signal voice input output system
CN201328181Y (en) Multichannel digital sound-field wireless headset device
CN103079142B (en) A kind of wireless bass big gun bass time delay adjustable system and method
CN219499520U (en) Bluetooth audio receiving and converting device
CN219960829U (en) Multi-mode switching audio receiving conversion device
CN211089779U (en) Audio output system for television
CN208739395U (en) Audio board and digital sound console
CN206442510U (en) The Mini-type audio equipment system of multitrack surround sound
CN218830655U (en) Low-power consumption bluetooth audio frequency receiving and converting device
JP3144831U (en) Wireless audio system with stereo output
CN111867145A (en) 5G sound box, distributed sound system based on 5G sound box and wireless communication method
CN216134569U (en) Wireless microphone system
CN218920423U (en) Data transmission adapting assembly and data transmission system
CN116347413B (en) Audio transmission device and method
CN218473406U (en) Bluetooth wireless transmission device and system
CN114866115B (en) Bluetooth conversion equipment, charging bin and audio playing system

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant