2.4g wireless transceiving broadcast playing system

Abstract

This invention belongs to the field of audio transmission technology, and particularly relates to a 2.4G wireless transceiver broadcasting and playback system. It includes a Bluetooth transmitter board with multiple signal sources and several Bluetooth receiver amplifier boards. The various audio input circuits, level conversion circuits, and transmitter power supply circuits in the Bluetooth transmitter board are electrically connected to the transmitter main control circuit. The digital power amplifier circuits and receiver power supply circuits in the Bluetooth receiver amplifier boards are electrically connected to the receiver main control circuit. The transmitter main control circuit and the receiver main control circuit are communicatively connected. This invention uses multiple audio input circuits to receive various audio signals, transmits them via Bluetooth at 2.4G to the receiver main control circuit, and finally amplifies and outputs them through the digital power amplifier circuit. This achieves wireless transmission while simultaneously supporting one transmitter for multiple receivers, enabling real-time transmission and playback using 2.4G. It meets the needs of different occasions and music lovers, providing users with convenient operation and a rich soundstage experience.

Description

Technical Field

[0001] This utility model belongs to the field of audio transmission technology, and in particular relates to a 2.4G wireless transceiver broadcasting system. Background Technology

[0002] As wireless communication technologies are increasingly applied to daily life, their convenience for data transmission is becoming increasingly apparent. This is no exception in the music industry, where wireless communication technology is used to achieve high-fidelity audio transmission and reception. For example, an audio transceiver is a device primarily used to receive and transmit audio signals; it typically consists of an input section, a processing section, and an output section. The input section receives the audio signal, the processing section processes the received audio signal, and the output section transmits the processed audio signal. Regarding wireless network coverage, Wi-Fi, Bluetooth, and 5G are all options for audio transmission. Bluetooth transmission bandwidth has expanded from the initial 1 Mbit / s to the current 24 Mbit / s, and Bluetooth 4.0 and above can transmit high-quality (though bandwidth is insufficient for lossless) audio. Bluetooth is primarily used for transmitting mono and stereo audio. Wi-Fi transmission has sufficient bandwidth to transmit lossless audio to a DSP for decoding, which is also the future direction of modern Wi-Fi. Therefore, Wi-Fi speakers are superior to Bluetooth speakers in terms of audio source. Some products also use WiFi for multi-channel audio transmission. Compared to 2.4GHz transmission (which uses the same frequency band as Bluetooth and WiFi), 5.8GHz audio transmission has fewer devices, less interference, and better performance. With sufficient bandwidth, 5.8GHz can transmit lossless audio. Both 2.4GHz and 5.8GHz bands have their advantages. 2.4GHz wireless operates in the global unlicensed ISM channel range of 2400M-2483M; 5.8GHz is a higher frequency, more open ISM band. 2.4GHz wireless can automatically scan frequencies upon power-on, offering 50 working channels, allowing 50 users to work simultaneously in the same location without manual channel coordination or configuration. 5.8GHz uses Orthogonal Frequency Division Multiplexing (OFDM) technology and point-to-multipoint / point-to-point networking, achieving single-sector speeds of up to 54Mbps. The 2.4GHz band, due to its lower frequency, performs better in terms of penetration and transmission distance, while the 5.8GHz band offers higher data transmission rates.

[0003] For example, Chinese utility model patent application number CN202220894824.8 discloses a wireless audio transceiver device and a wireless audio transceiver system. The wireless audio transceiver device includes a first transceiver and a second transceiver. The first transceiver includes a first circuit board, and a first wireless transmission module, a first audio interface, and a first audio processor electrically connected to the first circuit board. The first audio interface is used for electrical connection to an electronic device. The first audio processor is used for transmitting audio received by the first wireless transmission module to the electronic device. The second transceiver includes a second circuit board, and a second wireless transmission module, a second audio interface, and a second audio processor electrically connected to the second circuit board. The second wireless transmission module is wirelessly connected to the first wireless transmission module, and the second audio interface is used for electrical connection to a sound mixing device with various ambient sounds. The second audio processor is used for transmitting audio from the sound mixing device to the first wireless transmission module via the second wireless transmission module. By setting up two wirelessly connected transceivers, the device can be carried by the user. When a user needs to adjust the audio input from an electronic device, a first transceiver can quickly connect to the electronic device via a first audio interface, and a second transceiver can quickly connect to the audio mixing device via a second audio interface. Then, the audio from various scenarios can be selectively sent to the electronic device to mix with other audio (such as human voice) captured by the electronic device. For example, when a user is live streaming using the electronic device, the live audio captured by the electronic device can have a mixed enhancement effect, ensuring the richness of the audio received by the electronic device and meeting the user's needs in live streaming and other application scenarios. Therefore, the electronic device and the audio mixing device can be conveniently and quickly connected via a plug-and-play wireless audio transceiver.

[0004] Based on the above analysis, existing wireless audio transmission equipment is basically unable to achieve multi-terminal connection because the large data flow of audio data transmission makes it difficult to solve the processing incoordination caused by the simultaneous transmission of audio signals and data. Furthermore, the use of traditional connecting cables between the audio transmitter and the music playback system can easily lead to complex installation projects, high construction costs, and difficult maintenance in the later stages. Utility Model Content

[0005] In view of the problems existing in the prior art, this utility model provides a 2.4G wireless transceiver broadcasting system.

[0006] This utility model is implemented as follows: A 2.4G wireless transceiver broadcasting system includes a Bluetooth transmitter board with multiple signal sources and several Bluetooth receiver amplifier boards. The Bluetooth transmitter board includes multiple audio input circuits, a main transmission control circuit, a level conversion circuit, and a transmission power supply circuit. The multiple audio input circuits, the level conversion circuit, and the transmission power supply circuit are all electrically connected to the main transmission control circuit. The Bluetooth receiver amplifier board includes a main receiver control circuit, a digital power amplifier circuit, and a receiver power supply circuit. The digital power amplifier circuit and the receiver power supply circuit are all electrically connected to the main receiver control circuit. The main transmission control circuit is communicatively connected to the main receiver control circuit.

[0007] Furthermore, the main control circuit for transmission includes a Bluetooth main control chip U5, a crystal oscillator X1, a resistor R21, and a resistor R22, all of which are connected to the Bluetooth main control chip U5.

[0008] Furthermore, the various audio input circuits include a coaxial transmission circuit, an optical fiber transmission circuit, an AUX transmission circuit, an HDMI transmission circuit, and a USB transmission circuit, all of which are connected to the Bluetooth main control chip U5.

[0009] Furthermore, the level conversion circuit includes operational amplifier U7A, operational amplifier U7B, inductor L5, inductor L6, inductor L7, and inductor L8. Operational amplifier U7A is connected to inductor L5, inductor L6, and Bluetooth master control chip U5, respectively. Operational amplifier U7B is connected to inductor L7, inductor L8, and Bluetooth master control chip U5, respectively.

[0010] Furthermore, the receiving main control circuit includes a Bluetooth main control chip U3, resistors R7 and R9, and resistors R7 and R9 are both connected to the Bluetooth main control chip U3.

[0011] Furthermore, the digital power amplifier circuit includes a digital power amplifier chip U4, inductors L1, L2, L3, and L4, and the Bluetooth master control chip U3, inductors L1, L2, L3, and L4 are all connected to the digital power amplifier chip U4.

[0012] The technical effects and advantages of the technical solution protected by this utility model are specifically described as follows: By setting up multiple audio input circuits to access various audio signals, and transmitting them to the receiving main control circuit in the form of broadcast through the transmitting main control circuit, and finally amplifying and outputting them through the digital power amplifier circuit, wireless transmission can be achieved while one transmitter corresponds to multiple receivers. Real-time transmission and playback can be achieved using 2.4G, meeting the sound quality needs of different occasions and music lovers, allowing users to experience convenient operation, a full sound field experience, and solving the hassle of wiring. Installation is convenient and easy to maintain. In terms of construction, it not only reduces the hassle of pulling wires, but also allows multiple speakers to play simultaneously, creating a huge sound field, allowing listeners to be fully surrounded by beautiful music, meeting the needs of a wide range of music lovers, and allowing users to experience an unprecedented sound field. Attached Figure Description

[0013] Figure 1 This is a structural block diagram of the present invention;

[0014] Figure 2 This is a circuit diagram of the main control circuit for transmitting in this utility model;

[0015] Figure 3 This is a circuit diagram of the receiving main control circuit in this utility model;

[0016] In the diagram: 1-Bluetooth transmitter board, 2-Bluetooth receiver amplifier board, 11-Multiple audio input circuits, 12-Transmitter main control circuit, 13-Level conversion circuit, 14-Transmitter power supply circuit, 21-Receiver main control circuit, 22-Digital power amplifier circuit, 23-Receiver power supply circuit. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this utility model.

[0018] like Figure 1-3As shown, the 2.4G wireless transceiver broadcasting system includes a Bluetooth transmitter board 1 with multiple signal sources and several Bluetooth receiver amplifier boards 2. The Bluetooth transmitter board 1 includes multiple audio input circuits 11, a main transmission control circuit 12, a level conversion circuit 13, and a transmission power supply circuit 14. The multiple audio input circuits 11, the level conversion circuit 13, and the transmission power supply circuit 14 are all electrically connected to the main transmission control circuit 12. The Bluetooth receiver amplifier board 2 includes a main receiver control circuit 21, a digital power amplifier circuit 22, and a receiver power supply circuit 23. The digital power amplifier circuit 22 and the receiver power supply circuit 23 are both electrically connected to the main receiver control circuit 21. The main transmission control circuit 12 is communicatively connected to the main receiver control circuit. It should be noted that in practical applications, the Bluetooth transmitter board 1 is installed inside the transmitter and connected to the audio source device (including computer, amplifier, game console, smartphone, smart TV, projector, etc.). It establishes a wireless communication connection with the Bluetooth receiver amplifier board 2 via 2.4G Bluetooth or 5.8G Bluetooth. The Bluetooth receiver amplifier board 2 is installed inside the receiver and is connected to various headphones, passive speakers or active speakers, etc.

[0019] Optionally, the main control circuit 12 includes a Bluetooth main control chip U5, a crystal oscillator X1, resistors R21 and R22, all of which are connected to the Bluetooth main control chip U5. The multiple audio input circuits 11 include a coaxial transmission circuit, an optical fiber transmission circuit, an AUX transmission circuit, an HDMI transmission circuit, and a USB transmission circuit, all of which are connected to the Bluetooth main control chip U5. The level conversion circuit 13 includes an operational amplifier U7A, an operational amplifier U7B, an inductor L5, an inductor L6, an inductor L7, and an inductor L8. The operational amplifier U7A is connected to the inductor L5, the inductor L6, and the Bluetooth main control chip U5, and the operational amplifier U7B is connected to the inductor L7, the inductor L8, and the Bluetooth main control chip U5. It should be noted that the Bluetooth main control chip U5 uses the T8961B2 Bluetooth chip, which is used to send audio signals to the Bluetooth receiver amplifier board 2 via 2.4G or 5.8G Bluetooth communication. The coaxial transmission circuit and the optical fiber transmission circuit both receive audio signals through the SN65LVDS2DBVT receiver driver. The AUX transmission circuit receives audio signals through the AUX interface, the HDMI transmission circuit receives audio signals through the HDMI interface, and the USB transmission circuit receives audio signals through the USB interface. The transmitting power supply circuit 14 includes an AMS1117-3.3 chip and an AP2008TCER-ADJ chip, which are used to provide power to the Bluetooth transmitter board 1. This utility model will not be described in detail.

[0020] Optionally, the receiving main control circuit 21 includes a Bluetooth main control chip U3, resistors R7 and R9, both of which are connected to the Bluetooth main control chip U3. The digital power amplifier circuit 22 includes a digital power amplifier chip U4, inductors L1, L2, L3, and L4, all of which are connected to the digital power amplifier chip U4. The Bluetooth main control chip U3 uses a T8961B2 Bluetooth chip to receive audio signals sent from the Bluetooth transmitter board 1 and transmit them to the digital power amplifier chip U4. The digital power amplifier chip U4 uses an ACM8629 power amplifier chip to amplify the audio signals and output them to the speaker for playback. The receiving power supply circuit 23 includes a TPS54331DR chip, a PS-22F02 chip, and their peripheral circuits, etc., to provide power to the Bluetooth receiving power amplifier board 2. Further details are omitted here.

[0021] It should be noted that this utility model has a reasonable design and unique structure. It broadcasts various audio input signals via Bluetooth transmitter board 1 using 2.4G Bluetooth technology. Specifically, it sends relevant audio signals (HDMI, high-frequency input, optical fiber, coaxial, Bluetooth, AUX, USB flash drive, etc.) to various receivers (i.e., Bluetooth receiver amplifier board 2) via 2.4G broadcast. The Bluetooth receiver amplifier board 2 then converts, processes, and amplifies the received signals before outputting them. This achieves wireless transmission while also enabling one transmitter to multiple receivers. It can use 2.4G for real-time transmission and playback, and also utilizes the functionality of Bluetooth chip circuitry to maintain multiple signal strengths. The signal is transmitted in a broadcast format, meeting the needs of different occasions and music lovers, restoring the effect of the live performance. In terms of construction, it not only reduces the hassle of wiring but also allows multiple speakers to play simultaneously, creating a huge sound field that surrounds the listener with beautiful music. Users can experience an unprecedented sound field, enjoy convenient operation, and have a full sound field experience. Users can experience the original music effect and convenient multi-functional selection, satisfying not only consumers' requirements for sound quality and sound but also their needs for appearance and brand, and increasing the flexibility of music switching to meet the diverse needs of a wide range of users.

[0022] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any modifications, equivalent substitutions and improvements made by those skilled in the art within the technical scope disclosed in this utility model, and within the spirit and principles of this utility model, should be included within the protection scope of this utility model.

Claims

1. A 2.4G wireless transceiver broadcasting system, characterized in that: The system includes a Bluetooth transmitter board with multiple signal sources and several Bluetooth receiver amplifier boards. The Bluetooth transmitter board includes multiple audio input circuits, a main transmitter control circuit, a level conversion circuit, and a transmitter power supply circuit. The multiple audio input circuits, level conversion circuit, and transmitter power supply circuit are all electrically connected to the main transmitter control circuit. The Bluetooth receiver amplifier board includes a main receiver control circuit, a digital power amplifier circuit, and a receiver power supply circuit. The digital power amplifier circuit and the receiver power supply circuit are all electrically connected to the main receiver control circuit. The main transmitter control circuit is communicatively connected to the main receiver control circuit.

2. The 2.4G wireless transceiver broadcasting system according to claim 1, characterized in that: The main control circuit for transmission includes a Bluetooth main control chip U5, a crystal oscillator X1, a resistor R21, and a resistor R22. The crystal oscillator X1, the resistor R21, and the resistor R22 are all connected to the Bluetooth main control chip U5.

3. The 2.4G wireless transceiver broadcasting system according to claim 2, characterized in that: The various audio input circuits include a coaxial transmission circuit, an optical fiber transmission circuit, an AUX transmission circuit, an HDMI transmission circuit, and a USB transmission circuit. The coaxial transmission circuit, optical fiber transmission circuit, AUX transmission circuit, HDMI transmission circuit, and USB transmission circuit are all connected to the Bluetooth main control chip U5.

4. The 2.4G wireless transceiver broadcasting system according to claim 2, characterized in that: The level conversion circuit includes operational amplifier U7A, operational amplifier U7B, inductor L5, inductor L6, inductor L7, and inductor L8. Operational amplifier U7A is connected to inductor L5, inductor L6, and Bluetooth master control chip U5, respectively. Operational amplifier U7B is connected to inductor L7, inductor L8, and Bluetooth master control chip U5, respectively.

5. The 2.4G wireless transceiver broadcasting system according to claim 1, characterized in that: The receiving main control circuit includes a Bluetooth main control chip U3, resistors R7 and R9, and resistors R7 and R9 are both connected to the Bluetooth main control chip U3.

6. The 2.4G wireless transceiver broadcasting system according to claim 5, characterized in that: The digital power amplifier circuit includes a digital power amplifier chip U4, inductors L1, L2, L3 and L4, and the Bluetooth master control chip U3, inductors L1, L2, L3 and L4 are all connected to the digital power amplifier chip U4.

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