A wireless audio module, communication method and transmission system

Abstract

This invention provides a wireless audio module, communication method, and transmission system, relating to the field of communication technology. The wireless audio module provided by this invention employs an architecture combining a main control chip and a radio frequency front-end chip. The main control chip switches between two different communication protocols, StarFlash and Bluetooth. In transmit mode, it selects the appropriate communication protocol for processing based on the type of audio data. In receive mode, it identifies the protocol type of the radio frequency signal and selects the appropriate protocol for decoding, thus achieving compatibility support for both StarFlash and Bluetooth communication methods on the same module. By flexibly selecting suitable communication protocols for different application scenarios, the applicability of the wireless audio module is effectively expanded, while reducing the development complexity and material costs of terminal products when adapting to various usage requirements.

Description

Technical Field

[0001] This invention relates to the field of communication technology, and more specifically, to a wireless audio module, a communication method, and a transmission system. Background Technology

[0002] With the widespread application of wireless audio devices, terminal products have placed higher demands on the transmission performance, functional adaptability, and system integration of wireless audio modules. As the core component connecting the audio source and the playback terminal, the design of the wireless audio module directly affects the complexity of the overall solution. Currently, most wireless audio modules on the market only support a single wireless communication standard and typically use specific protocol chips to achieve point-to-point or point-to-multipoint audio data transmission and reception.

[0003] However, this single-communication architecture struggles to meet diverse application needs, lacking flexibility in adapting to high-bandwidth lossless transmission and conventional mobile device interconnection. Furthermore, constrained by inherent protocol frameworks, wireless audio modules exhibit significant bottlenecks in transmission distance, interference resistance, and power consumption control. This forces terminal manufacturers to combine multiple modules for different usage scenarios, increasing product development cycles and material management costs, and limiting further optimization of overall system performance. Summary of the Invention

[0004] The objectives of this invention include, for example, providing a wireless audio module, communication method, and transmission system that can at least partially solve the aforementioned technical problems.

[0005] The embodiments of the present invention can be implemented as follows: In a first aspect, embodiments of the present invention provide a wireless audio module applied to a wireless audio transmission system, the wireless audio transmission system further including a sound source device and an audio output device, the wireless audio module being connected to the sound source device or the audio output device via an audio interface; the wireless audio module includes a main control chip and a radio frequency front-end chip, the main control chip being connected to the radio frequency front-end chip, the radio frequency front-end chip being provided with an antenna interface for connecting an antenna; The main control chip is used to switch between the StarFlash protocol and the Bluetooth protocol; in transmit mode, it controls the RF front-end chip to switch to transmit mode, receives audio data from the audio source device through the audio interface, processes the audio data according to the StarFlash protocol and / or Bluetooth protocol to generate an RF signal to be transmitted, and transmits it to the RF front-end chip in receive mode; and in receive mode, it controls the RF front-end chip to switch to receive mode, receives the RF signal sent by the RF front-end chip in transmit mode, decodes the RF signal according to the StarFlash protocol and / or Bluetooth protocol to restore the audio data, and outputs it to the audio output device through the audio interface. The radio frequency front-end chip is configured to transmit radio frequency signals from the main control chip in the transmit state and output them to the antenna via the antenna interface; and in the receive state, to receive radio frequency signals from the antenna via the antenna interface and transmit them to the main control chip.

[0006] Optionally, the audio interface includes a first I2S interface and a second I2S interface; the main control chip is further used for: In the transmission mode, audio data from the audio source device is received individually through the first I2S interface, or audio data from the audio source device is received simultaneously through the first I2S interface and the second I2S interface. When the first I2S interface receives data alone, the audio data is three-channel audio data and is carried in TDM signals on the same set of I2S data lines; when the first I2S interface and the second I2S interface receive data simultaneously, the left channel, right channel and bass channel of the audio data are respectively distributed and transmitted on two sets of I2S data lines.

[0007] Optionally, the RF front-end chip internally includes a power amplifier path and a first bypass path; the main control chip is further configured to: In the transmission mode, the signal strength and signal-to-noise ratio fed back by the wireless audio module in the reception mode are obtained; Based on the automatic rate adaptation algorithm, the target transmit power level and the corresponding target modulation and coding scheme are determined according to the signal strength and the signal-to-noise ratio. When the target transmit power level is higher than a preset threshold, the radio frequency front-end chip is controlled to transmit through the power amplifier path; When the target transmit power level is not higher than the preset threshold, the radio frequency front-end chip is controlled to transmit through the first bypass path.

[0008] Optionally, the RF front-end chip internally includes a low-noise amplifier path and a second bypass path; the main control chip is further used for: In the receiving mode, the relationship between the signal strength of the received radio frequency signal and a preset signal strength threshold is determined; When the signal strength is lower than a preset signal strength threshold, the radio frequency front-end chip is controlled to receive and process the radio frequency signal through the low noise amplifier path; When the signal strength is not lower than the preset signal strength threshold, the radio frequency front-end chip is controlled to receive and process the radio frequency signal through the second bypass path.

[0009] Optionally, the antenna interface includes a first antenna interface and a second antenna interface; the main control chip is further used for: In the transmission mode, the transmit antenna signal quality information fed back by the wireless audio module in the receiving mode is obtained, wherein the transmit antenna signal quality information includes the first antenna signal quality information corresponding to the first antenna interface and the second antenna signal quality information corresponding to the second antenna interface; By comparing the first antenna signal quality information with the second antenna signal quality information, the antenna interface corresponding to the transmit antenna signal quality information with higher signal quality is selected as the target transmit antenna interface, and the RF front-end chip is controlled to transmit test signals through the target transmit antenna interface.

[0010] Optionally, the main control chip is further used for: In the receiving mode, the receiving antenna signal quality information fed back by the wireless audio module in the transmitting mode is obtained, wherein the receiving antenna signal quality information includes the third antenna signal quality information corresponding to the first antenna interface and the fourth antenna signal quality information corresponding to the second antenna interface. By comparing the signal quality information of the third antenna with that of the fourth antenna, the antenna interface corresponding to the receiving antenna with higher signal quality is selected as the target receiving antenna interface, and the RF front-end chip is controlled to receive the test signal through the target receiving antenna interface.

[0011] Optionally, the main control chip is further used for: In the transmission mode, the audio data type of the audio data is determined, and the audio data type includes lossless multi-channel data type and ordinary data type; When the audio data type is the lossless multi-channel data type, the audio data is transmitted through the StarFlash protocol; when the audio data type is the ordinary data type, the audio data is transmitted through the Bluetooth protocol. In the receiving mode, the signal protocol type of the radio frequency signal is determined; based on the signal protocol type, it is determined whether the radio frequency signal is decoded using the StarFlash protocol or the Bluetooth protocol.

[0012] Optionally, the Bluetooth protocol includes the classic Bluetooth protocol and the Bluetooth Low Energy protocol, and the main control chip is further used for: In the transmission mode, the mobile terminal is connected via the classic Bluetooth protocol, audio data from the mobile terminal is received, the audio data is processed according to the classic Bluetooth protocol, and then transmitted to the radio frequency front-end chip for transmission. In the receiving mode, the device communicates with the wireless audio module in the receiving mode via the Bluetooth Low Energy protocol for ranging and angle measurement. Based on the ranging and angle measurement results, the spatial position of the audio output device is determined, and sound field calibration parameters are generated based on the spatial position to perform equalization processing on the audio output by the audio output device.

[0013] Secondly, embodiments of the present invention provide a wireless audio communication method applied to a wireless audio transmission system. The wireless audio transmission system includes a sound source device, a wireless audio module, and an audio output device. The wireless audio module is connected to the sound source device or the audio output device via an audio interface. The wireless audio module includes a main control chip and a radio frequency front-end chip. The main control chip is connected to the radio frequency front-end chip, and the radio frequency front-end chip is provided with an antenna interface for connecting an antenna. The method includes: The main control chip switches between the StarFlash protocol and the Bluetooth protocol. In transmit mode, it controls the RF front-end chip to switch to transmit mode, receives audio data from the audio source device through the audio interface, processes the audio data according to the StarFlash protocol and / or Bluetooth protocol to generate an RF signal to be transmitted, and transmits it to the RF front-end chip in receive mode. In receive mode, it controls the RF front-end chip to switch to receive mode, receives the RF signal sent by the RF front-end chip in transmit mode, decodes the RF signal according to the StarFlash protocol and / or Bluetooth protocol to restore the audio data, and outputs it to the audio output device through the audio interface. The radio frequency front-end chip transmits radio frequency signals from the main control chip in the transmit state and outputs them to the antenna via the antenna interface; and in the receive state, it receives radio frequency signals from the antenna via the antenna interface and transmits them to the main control chip.

[0014] Thirdly, embodiments of the present invention provide a wireless audio transmission system, the wireless audio transmission system including a sound source device, a wireless audio module and an audio output device, the wireless audio module being connected to the sound source device or the audio output device through an audio interface; the wireless audio module including a main control chip and a radio frequency front-end chip, the main control chip being connected to the radio frequency front-end chip, the radio frequency front-end chip being provided with an antenna interface for connecting an antenna; The main control chip is used to switch between the StarFlash protocol and the Bluetooth protocol; in transmit mode, it controls the RF front-end chip to switch to transmit mode, receives audio data from the audio source device through the audio interface, processes the audio data according to the StarFlash protocol and / or Bluetooth protocol to generate an RF signal to be transmitted, and transmits it to the RF front-end chip in receive mode; and in receive mode, it controls the RF front-end chip to switch to receive mode, receives the RF signal sent by the RF front-end chip in transmit mode, decodes the RF signal according to the StarFlash protocol and / or Bluetooth protocol to restore the audio data, and outputs it to the audio output device through the audio interface. The radio frequency front-end chip is used to transmit radio frequency signals from the main control chip in the transmit state and output them to the antenna via the antenna interface; and in the receive state, to receive radio frequency signals from the antenna via the antenna interface and transmit them to the main control chip. The audio source device is used to generate the audio data and send the audio data to the main control chip of the wireless audio module in the transmission mode through the audio interface; The audio output device is used to receive audio data sent by the main control chip of the wireless audio module in the receiving mode, and to play the audio data.

[0015] The beneficial effects of the embodiments of the present invention include, for example: The wireless audio module provided in this invention adopts an architecture of a main control chip paired with an RF front-end chip. The main control chip controls the RF front-end chip to switch between two different communication protocols: StarFlash and Bluetooth. In transmit mode, the appropriate communication protocol is selected for processing based on the type of audio data. In receive mode, the protocol type of the RF signal is identified and the appropriate protocol is selected for decoding. This achieves compatibility support for both StarFlash and Bluetooth communication methods on the same module. By flexibly selecting suitable communication protocols for different application scenarios, the applicability of the wireless audio module is effectively expanded, while reducing the development complexity and material costs of terminal products when adapting to various usage requirements. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 An architecture diagram of a wireless audio transmission system provided in an embodiment of the present invention; Figure 2 A connection diagram of a wireless audio module in different modes provided in an embodiment of the present invention; Figure 3 This is one of the schematic diagrams of an audio data receiving method provided in an embodiment of the present invention; Figure 4 This is a second schematic diagram of an audio data receiving method provided in an embodiment of the present invention; Figure 5 A flowchart illustrating the steps of a wireless audio communication method provided in an embodiment of the present invention.

[0018] Icons: 01-Wireless audio transmission system; 10-Audio source device; 20-Wireless audio module; 21-RF front-end chip; 211-Antenna interface; 22-Main control chip; 221-Audio interface; 30-Audio output device. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0023] It should be noted that, where there is no conflict, the features in the embodiments of the present invention can be combined with each other.

[0024] Please refer to Figure 1 This is an architecture diagram of a wireless audio transmission system 01 provided in this application. The wireless audio transmission system 01 includes an audio source device 10, a wireless audio module 20, and an audio output device 30. The wireless audio module 20 is connected to the audio source device 10 or the audio output device 30 through an audio interface 221. The wireless audio module 20 includes a main control chip 22 and a radio frequency front-end chip 21. The main control chip 22 is connected to the radio frequency front-end chip 21, and the radio frequency front-end chip 21 is provided with an antenna interface 211 for connecting an antenna.

[0025] The main control chip 22 controls the RF front-end chip 21 to switch between the StarFlash protocol and the Bluetooth protocol. In transmit mode, it controls the RF front-end chip 21 to switch to transmit mode, receive audio data from the audio source device 10 through the audio interface 221, process the audio data according to the StarFlash protocol and / or Bluetooth protocol to generate an RF signal to be transmitted, and transmit it to the RF front-end chip 21 in receive mode. In receive mode, it controls the RF front-end chip 21 to switch to receive mode, receive the RF signal sent by the RF front-end chip 21 in transmit mode, decode the RF signal according to the StarFlash protocol and / or Bluetooth protocol to reconstruct the audio data, and output it to the audio output device 30 through the audio interface 221.

[0026] The radio frequency front-end chip 21 is used to process the radio frequency signal from the main control chip 22 in the transmit state and output it to the antenna via the antenna interface 211. In the receive state, it processes the radio frequency signal from the antenna via the antenna interface 211 and transmits it to the main control chip 22.

[0027] Audio source device 10 is used to generate audio data and send the audio data to the main control chip 22 of the wireless audio module 20 in transmit mode via audio interface 221. Audio output device 30 is used to receive the audio data sent by the main control chip 22 of the wireless audio module 20 in receive mode and play the audio data.

[0028] In this embodiment of the invention, the audio source device 10 generates audio data and sends it to the main control chip 22 of the wireless audio module 20 in transmit mode via the audio interface 221. The audio source device 10 can be various audio sources such as a television, mobile phone, Blu-ray player, or microphone. The audio output device 30 receives the audio data sent by the main control chip 22 of the wireless audio module 20 in receive mode and plays the audio data. The audio output device 30 can be a speaker, headphones, or other device with audio playback capabilities. Figure 1 As shown, the wireless audio transmission system 01 includes an audio source device 10, a wireless audio module 20, and an audio output device 30. The wireless audio module 20 is connected to the audio source device 10 or the audio output device 30 through an audio interface 221. The wireless audio module 20 includes a main control chip 22 and a radio frequency front-end chip 21. The main control chip 22 is connected to the radio frequency front-end chip 21. The radio frequency front-end chip 21 is provided with an antenna interface 211 for connecting an antenna.

[0029] The main control chip 22 controls the RF front-end chip 21 to switch between the StarFlash protocol and the Bluetooth protocol. In transmit mode, it controls the RF front-end chip 21 to switch to transmit mode, receive audio data from the audio source device 10 through the audio interface 221, process the audio data according to the StarFlash protocol or Bluetooth protocol to generate an RF signal to be transmitted, and transmit it to the RF front-end chip 21. In receive mode, it controls the RF front-end chip 21 to switch to receive mode, receive RF signals from the RF front-end chip 21, decode the RF signals according to the StarFlash protocol and / or Bluetooth protocol to restore the audio data, and output it to the audio output device 30 through the audio interface 221. The RF front-end chip 21 is used to process the RF signals from the main control chip 22 in transmit mode and output them to the antenna through the antenna interface 211, and to receive and process the RF signals from the antenna through the antenna interface 211 in receive mode and transmit them to the main control chip 22.

[0030] For example, if the audio source device 10 is a television, it sends the decoded multi-channel audio data to the main control chip 22 in transmit mode via audio interface 221. Since it is multi-channel audio data, the main control chip 22 packages the left and right channel audio data separately according to the StarFlash protocol to generate radio frequency signals, which are then transmitted via the radio frequency front-end chip 21 and the antenna. The wireless audio modules in receive mode built into the two wireless surround satellite speakers receive the corresponding channel radio frequency signals through antenna interface 211. After being decoded and restored by the radio frequency front-end chip 21, the signals are output to the power amplifier chip inside the satellite speakers through audio interface 221, and finally drive the speakers to play the audio. This constitutes a complete wireless audio transmission system 01 from the audio source to the multi-channel audio output, realizing the function of independent Hi-Res channel synchronous output of multiple satellite speakers.

[0031] It should be noted that the switching between transmit and receive modes by the main control chip 22 in the wireless audio module 20 only applies to the direction of audio data transmission (transmitting or receiving audio data). That is, when audio data needs to be transmitted, the wireless audio module 20 acts as a transmitting module, the main control chip 22 switches to transmit mode, and the RF front-end chip 21 switches to transmit mode. However, the wireless audio module 20, acting as a transmitting module, can also receive data other than audio data. Similarly, when audio data needs to be received, the wireless audio module 20 acts as a receiving module, the main control chip 22 switches to receive mode, and the RF front-end chip 21 switches to receive mode. However, the wireless audio module 20, acting as a receiving module, can also transmit data other than audio data.

[0032] Corresponding to the wireless audio transmission system 01, this embodiment of the invention provides a wireless audio module applied to the wireless audio transmission system. The wireless audio transmission system further includes an audio source device and an audio output device. The wireless audio module is connected to the audio source device or the audio output device through an audio interface. The wireless audio module includes a main control chip and a radio frequency front-end chip. The main control chip is connected to the radio frequency front-end chip. The radio frequency front-end chip is provided with an antenna interface for connecting an antenna.

[0033] The main control chip is used to switch between the StarFlash protocol and the Bluetooth protocol. In transmit mode, it controls the RF front-end chip to switch to transmit mode, receives audio data from the audio source device through the audio interface, processes the audio data according to the StarFlash protocol and / or Bluetooth protocol to generate an RF signal to be transmitted, and transmits it to the RF front-end chip in receive mode. In receive mode, it controls the RF front-end chip to switch to receive mode, receives the RF signal sent by the RF front-end chip in transmit mode, decodes the RF signal according to the StarFlash protocol and / or Bluetooth protocol to reconstruct the audio data, and outputs it to the audio output device through the audio interface.

[0034] The radio frequency front-end chip is configured to transmit radio frequency signals from the main control chip in the transmit state and output them to the antenna via the antenna interface. In the receive state, it is configured to receive radio frequency signals from the antenna via the antenna interface and transmit them to the main control chip.

[0035] Wireless audio modules can be used in wireless audio transmission systems. Besides the wireless audio module, the wireless audio transmission system can include audio source devices and audio output devices. The wireless audio module can establish a connection with the audio source device or audio output device through its own configured audio interface.

[0036] When the wireless audio module is used as a transmitter (i.e., in transmit mode), it connects to the audio source device via an audio interface. When the wireless audio module is used as a receiver (i.e., in receive mode), it connects to the audio output device. The core hardware of the wireless audio module can include a main control chip and an RF front-end chip, which are electrically connected. The RF front-end chip has an antenna interface for connecting an antenna.

[0037] The main control chip (such as the Hi3372 chip) is the control core of the entire module. It is responsible for controlling the RF front-end chip to switch between the StarFlash protocol and the Bluetooth protocol, so that the wireless audio module can operate under different wireless communication protocols according to application requirements. When the wireless audio module is in transmit mode, the main control chip controls the RF front-end chip to switch to transmit mode and receives audio data from the audio source device through the audio interface. Then, it processes the received audio data according to the StarFlash protocol or the Bluetooth protocol to generate the RF signal to be transmitted, and transmits the RF signal to the RF front-end chip for transmission.

[0038] When the wireless audio module is in receive mode, the main control chip controls the RF front-end chip to switch to receive mode, receive the RF signal transmitted from the RF front-end chip in transmit mode, and decode the RF signal according to the StarFlash protocol or Bluetooth protocol to recover the audio data from the RF signal. Finally, the recovered audio data is output to the audio output device through the audio interface.

[0039] The RF front-end chip is responsible for the physical layer processing of RF signals. In transmit mode, the RF front-end chip processes the RF signals from the main control chip (such as power amplification) and outputs the processed RF signals to the antenna via the antenna interface to achieve wireless transmission. In receive mode, the RF front-end chip processes the RF signals from the antenna via the antenna interface (including low-noise amplification) and transmits the processed RF signals to the main control chip.

[0040] For example, such as Figure 2 As shown, in a soundbar system, when the wireless audio module is configured within the soundbar as a transmitting module, it connects to the audio processing chip on the soundbar's main control board via an audio interface (such as an I2S interface) to receive multi-channel audio data from the audio processing chip. The main control chip packages and processes the multi-channel audio data according to the StarSignal protocol and transmits it to each satellite speaker through the RF front-end chip and antenna. The wireless audio module configured within the satellite speaker as a receiving module receives the RF signal transmitted from the wireless audio module in the soundbar via its antenna. The RF front-end chip amplifies the RF signal with low noise before transmitting it to the main control chip. The main control chip decodes and reconstructs the multi-channel audio data according to the StarSignal protocol and outputs it through the audio interface to the digital amplifier chip inside the satellite speaker, thereby driving the speakers to produce sound.

[0041] Optionally, the main control chip is further used for: In the transmission mode, the audio data type of the audio data is determined, and the audio data type includes lossless multi-channel data type and ordinary data type.

[0042] When the audio data type is the lossless multi-channel data type, the audio data is transmitted via the StarFlash protocol. When the audio data type is the ordinary data type, the audio data is transmitted via the Bluetooth protocol. In the receiving mode, the signal protocol type of the radio frequency signal is determined. Based on the signal protocol type, it is determined whether the radio frequency signal will be decoded using the StarFlash protocol or the Bluetooth protocol.

[0043] The main control chip can determine the audio data type in the transmission mode. The audio data type includes lossless multi-channel data type and ordinary data type. When the audio data type is lossless multi-channel data type, the audio data is transmitted through the StarFlash protocol. When the audio data type is ordinary data type, the audio data is transmitted through the Bluetooth protocol.

[0044] In other words, in transmit mode, the main control chip can automatically select the appropriate wireless communication protocol based on the specific type of audio data to be transmitted. For scenarios requiring the transmission of 48kHz / 24bit lossless Hi-Res audio and parallel distribution to multiple satellite speakers, the StarSpark protocol is used for transmission, leveraging its high bandwidth and throughput to achieve synchronous output of multi-channel lossless audio. For ordinary audio data transmission scenarios, such as transmitting standard-quality music from a mobile phone to a speaker system via Bluetooth, the Bluetooth protocol is used. Meanwhile, in receive mode, the main control chip can determine the signal protocol type of the RF signal. This is achieved by analyzing the frame structure and preamble of the received RF signal to determine whether it conforms to the StarSpark or Bluetooth protocol. Based on the determined signal protocol type, the chip selects either the StarSpark or Bluetooth protocol for decoding the RF signal, ensuring that the receiving end can correctly demodulate and decode the audio data.

[0045] Taking a practical application as an example, when a user plays a Blu-ray movie on a TV, the audio data output by the audio source device is in a multi-channel lossless format. The main control chip recognizes this audio data type as a lossless multi-channel data type and automatically switches the working protocol to the StarSpeed ​​protocol, transmitting the left channel, right channel, bass, and other audio data to the corresponding satellite speakers respectively. When a user plays MP3 music through a mobile phone connected to the audio system, the main control chip recognizes the audio data type as a standard data type and automatically switches to the Bluetooth protocol. It receives and plays the audio data from the mobile phone via the classic Bluetooth protocol, thus achieving the function of automatically adapting the optimal communication protocol according to the audio source type, balancing the needs of high-quality audio transmission and wide device compatibility.

[0046] Optionally, the Bluetooth protocol includes the classic Bluetooth protocol and the Bluetooth Low Energy protocol, and the main control chip is further used for: In the transmission mode, the mobile terminal is connected via the classic Bluetooth protocol, audio data from the mobile terminal is received, the audio data is processed according to the classic Bluetooth protocol, and then transmitted to the radio frequency front-end chip for transmission.

[0047] In the receiving mode, the device communicates with the wireless audio module in the receiving mode via the Bluetooth Low Energy protocol for ranging and angle measurement. Based on the ranging and angle measurement results, the spatial position of the audio output device is determined, and sound field calibration parameters are generated based on the spatial position to perform equalization processing on the audio output by the audio output device.

[0048] Bluetooth protocols can include Bluetooth Classic (BR or EDR) and Bluetooth Low Energy (BLE). The main control chip can also utilize these two Bluetooth sub-protocols to achieve different functions in transmit and receive modes. In transmit mode, the main control chip connects to mobile terminals (such as mobile phones, tablets, etc.) via Bluetooth Classic, receives audio data from the mobile terminals, processes the audio data according to Bluetooth Classic, and then transmits it to the RF front-end chip for transmission. For example, when a user needs to play music from a mobile terminal such as a mobile phone through a speaker system, the user operates the mobile phone to establish a Bluetooth Classic connection with the speaker system. The mobile phone, as the audio source device, sends audio data to the wireless audio module through Bluetooth audio profiles such as A2DP. After receiving the audio data via Bluetooth Classic, the wireless audio module can further distribute the audio data to various satellite speakers via Bluetooth, or it can directly output it to the speaker's amplifier system for playback via a wired connection.

[0049] In receive mode, the main control chip communicates with the wireless audio module in receive mode via Bluetooth Low Energy (BLE) for ranging and angle measurement. Based on the ranging and angle measurement results, it determines the spatial position of the audio output device and generates sound field calibration parameters to perform equalization processing on the audio output from the device. Specifically, the main control chip utilizes the high-precision positioning function of angle of arrival or departure angle supported by BLE 5.0 and above protocols. It communicates with each satellite speaker via BLE 5.0 to measure the signal arrival angle and distance, thereby calculating the spatial orientation and distance of each satellite speaker relative to the main body of the soundbar. Based on the determined spatial positions of each satellite speaker, the main control chip calculates the sound field equalization parameters and independently adjusts the gain and delay of the audio signal output to each speaker, achieving automatic sound field calibration.

[0050] Taking a real-world application scenario as an example, in a home theater system equipped with a soundbar and two wireless surround satellite speakers, the user can place the satellite speakers arbitrarily on either side of the sofa. The main control chip in the soundbar communicates with the two satellite speakers via the BLE protocol to measure distance and angle, obtaining the distance and azimuth of the two satellite speakers relative to the soundbar. Based on this spatial position information, the main control chip automatically calculates the delay compensation and gain adjustment parameters corresponding to the left and right surround channels, and applies corresponding sound field calibration processing when transmitting audio data to the satellite speakers via the StarSignal protocol, so that the listener can obtain the best surround sound listening experience. The entire process requires no manual adjustment by the user, nor does it require additional configuration of microphone arrays and dedicated DSP chips in the system, which greatly reduces hardware costs and design complexity.

[0051] Optionally, the audio interface includes a first I2S interface and a second I2S interface. The main control chip is further used for: In the transmission mode, audio data from the audio source device is received individually through the first I2S interface, or audio data from the audio source device is received simultaneously through the first I2S interface and the second I2S interface.

[0052] When the first I2S interface receives data alone, the audio data is three-channel audio data and is carried in TDM signals on the same set of I2S data lines. When the first I2S interface and the second I2S interface receive data simultaneously, the left channel, right channel, and bass channel of the audio data are respectively distributed and transmitted on two sets of I2S data lines.

[0053] The audio interface may include a first I2S (integrated audio bus) interface and a second I2S interface. The main control chip can receive audio data from the audio source device individually through the first I2S interface, or it can receive audio data from the audio source device simultaneously through both the first and second I2S interfaces. When receiving audio data individually through the first I2S interface, the received audio data is three-channel audio data, and this three-channel audio data is carried in a TDM (Time Division Multiplexing) signal on the same set of I2S data lines. That is, the audio source device transmits the audio data of the left, right, and bass channels by multiplexing them in a time-division multiplexing manner on a set of I2S data lines. The main control chip receives the TDM signal through the DIN pin of the first I2S interface, and demultiplexes the TDM signal to separate the audio data of the three channels.

[0054] When using both the first and second I2S interfaces for simultaneous reception, the left, right, and bass channels of the audio data are transmitted on two separate sets of I2S data lines. That is, the audio source device transmits the audio data for all three channels in parallel to the module via the DIN pins of the two I2S interfaces. Taking a practical hardware connection scheme as an example, such as... Figure 3 As shown, when the I2S interface of the external main control chip paired with the main control chip does not support TDM mode output, the external chip SoC needs to connect two different DOUT pins to the DIN pins of the two sets of I2S interfaces of the module respectively. The left and right channels are transmitted through the first I2S interface (I2S0 in the figure), and the subwoofer channel is transmitted through the second I2S interface (I2S1 in the figure), thus realizing the transmission of lossless audio signals from one to three. However, when the I2S interface of the external main control chip supports TDM mode, as shown... Figure 4 As shown, the external chip SoC only needs to connect one DOUT pin to the DIN pin of the module's first I2S interface (I2S0 in the figure). The audio data of the three channels is transmitted in the form of TDM signals on the same set of data lines, and the wireless audio module can receive them individually through the first I2S interface.

[0055] Optionally, the RF front-end chip internally includes a power amplifier path and a first bypass path. The main control chip is further configured to: In the transmission mode, the signal strength and signal-to-noise ratio fed back by the wireless audio module in the reception mode are obtained.

[0056] Based on the automatic rate adaptation algorithm, the target transmit power level and the corresponding target modulation and coding scheme are determined according to the signal strength and the signal-to-noise ratio.

[0057] When the target transmit power level is higher than a preset threshold, the radio frequency front-end chip is controlled to transmit through the power amplifier path.

[0058] When the target transmit power level is not higher than the preset threshold, the radio frequency front-end chip is controlled to transmit through the first bypass path.

[0059] In transmit mode, the main control chip can acquire the signal strength and signal-to-noise ratio (SNR) fed back by the wireless audio module in receive mode. This feedback process is implemented by the receiver (i.e., the wireless audio module in receive mode) periodically reporting the received signal quality parameters to the transmitter (i.e., the wireless audio module in transmit mode). Based on the Autorate algorithm, the main control chip determines the target transmit power level (e.g., seven levels from PCL0 to PCL6) and the corresponding target modulation and coding scheme according to the acquired signal strength and SNR. The transmit power and modulation and coding scheme differ for each level.

[0060] After determining the target transmit power level, the main control chip further determines whether the target transmit power level is higher than a preset threshold. When the target transmit power level is higher than the preset threshold, it indicates that a larger transmit output is required to meet the communication needs of long distances or complex electromagnetic environments. In this case, the main control chip controls the RF front-end chip to process the transmit signal through the power amplifier path, that is, the RF signal is amplified by the PA and then output to the antenna. When the target transmit power level is not higher than the preset threshold, it indicates that the current communication distance is relatively short or the channel conditions are good, and high-power transmission is not required to ensure communication quality. In this case, the main control chip controls the RF front-end chip to process the transmit signal through the first bypass path, and the RF signal is directly output to the antenna without being amplified by the PA, thereby reducing the power consumption of the transmit module.

[0061] Taking a wireless star-studded microphone as an example, when the microphone is close to the receiver, the RSSI (Received Signal Strength Indicator) from the receiver is strong. The main control chip determines that the target transmit power level is low, such as PCL4 or below, not exceeding a preset threshold (e.g., 0dBm). In this case, the control RF front-end chip selects the first bypass path, and the transmitted signal is not amplified by the PA, thereby extending the microphone's battery life. When the microphone is far from the receiver or there is a wall obstructing the signal, the RSSI from the receiver is weak. The main control chip determines that the target transmit power level is high, such as PCL0, exceeding the preset threshold. In this case, the control RF front-end chip selects the power amplifier path, transmitting the signal at a high power of 18dBm to ensure the stability and continuity of audio transmission.

[0062] Optionally, the RF front-end chip internally includes a low-noise amplifier path and a second bypass path. The main control chip is also used for: In the receiving mode, the relationship between the signal strength of the received radio frequency signal and a preset signal strength threshold is determined.

[0063] When the signal strength is lower than a preset signal strength threshold, the radio frequency front-end chip is controlled to receive and process the radio frequency signal through the low noise amplifier path.

[0064] When the signal strength is not lower than the preset signal strength threshold, the radio frequency front-end chip is controlled to receive and process the radio frequency signal through the second bypass path.

[0065] As an optional implementation, in receive mode, the main control chip determines the relationship between the signal strength of the received RF signal and a preset signal strength threshold. When the signal strength is lower than the preset threshold, it indicates that the received signal is weak and needs to be amplified by a low-noise amplifier (LNA) to improve receiving sensitivity. In this case, the main control chip controls the RF front-end chip to process the RF signal through the LNA path. That is, the weak signal received by the antenna is amplified by the LNA and then transmitted to the main control chip. At the same time, the main control chip dynamically adjusts the gain of its internal LNA to obtain a better signal-to-noise ratio. When the signal strength is not lower than the preset threshold, it indicates that the received signal is strong and demodulation requirements can be met without LNA amplification. In this case, the main control chip controls the RF front-end chip to process the RF signal through a second bypass path. That is, the signal received by the antenna is transmitted directly to the main control chip without passing through the LNA. This reduces receiving power consumption and prevents strong signal input from causing the LNA to saturate, which would degrade the receiver's signal-to-noise ratio and affect audio output quality.

[0066] Optionally, the antenna interface includes a first antenna interface and a second antenna interface. The main control chip is further used for: In the transmit mode, the transmit antenna signal quality information fed back by the wireless audio module in the receive mode is obtained, wherein the transmit antenna signal quality information includes the first antenna signal quality information corresponding to the first antenna interface and the second antenna signal quality information corresponding to the second antenna interface.

[0067] By comparing the first antenna signal quality information with the second antenna signal quality information, the antenna interface corresponding to the transmit antenna signal quality information with higher signal quality is selected as the target transmit antenna interface, and the RF front-end chip is controlled to transmit test signals through the target transmit antenna interface.

[0068] In transmit mode, the main control chip can acquire the transmit antenna signal quality information fed back by the wireless audio module in receive mode. This transmit antenna signal quality information includes the first antenna signal quality information corresponding to the first antenna interface and the second antenna signal quality information corresponding to the second antenna interface. The main control chip controls the RF front-end chip to transmit test signals through the two antenna interfaces respectively. After the receiving module (i.e., the wireless audio module in receive mode) receives the two signals through a fixed antenna, it feeds back the corresponding signal strength and quality information to the transmitting module (i.e., the wireless audio module in transmit mode). The main control chip compares the first antenna signal quality information with the second antenna signal quality information, selects the antenna interface corresponding to the transmit antenna signal quality information with higher signal quality as the target transmit antenna interface, and controls the RF front-end chip to transmit test signals through the target transmit antenna interface. In data transmission, the selected antenna interface is used for RF signal transmission.

[0069] In practical applications, when a wireless audio module is used as a transmitting module in a soundbar system, its first antenna interface is connected to the module's external pins. The user designs an RF path on the motherboard and connects it to the overall antenna. The second antenna interface is connected to the module's built-in PCB antenna or an external antenna connected via an IPEX connector. The two antennas may be installed in different physical locations in the audio product. Due to human body obstruction or reflection from metal parts, the actual radiation efficiency of the two antennas differs. The receiving module measures the transmission signal quality of the two antennas and feeds it back to the transmitting module. The main control chip selects the antenna with better signal quality as the target transmitting antenna, thereby improving uplink throughput and signal coverage.

[0070] Optionally, the main control chip is further used for: In the receiving mode, the receiving antenna signal quality information fed back by the wireless audio module in the transmitting mode is obtained, wherein the receiving antenna signal quality information includes the third antenna signal quality information corresponding to the first antenna interface and the fourth antenna signal quality information corresponding to the second antenna interface.

[0071] By comparing the signal quality information of the third antenna with that of the fourth antenna, the antenna interface corresponding to the receiving antenna with higher signal quality is selected as the target receiving antenna interface, and the RF front-end chip is controlled to receive the test signal through the target receiving antenna interface.

[0072] In one optional implementation, the main control chip can also acquire the received antenna signal quality information fed back by the wireless audio module in transmit mode in receive mode. This received antenna signal quality information includes the third antenna signal quality information corresponding to the first antenna interface and the fourth antenna signal quality information corresponding to the second antenna interface. In receive mode, the main control chip controls the RF front-end chip to receive the same signal from the transmit module through the two antennas respectively, measures the signal strength and quality parameters of the two signals respectively, and compares the third antenna signal quality information with the fourth antenna signal quality information. The antenna interface corresponding to the received antenna signal quality information with higher signal quality is selected as the target received antenna interface, and the RF front-end chip is controlled to receive the test signal through the target received antenna interface. In subsequent data reception, the selected antenna interface is continuously used to receive RF signals.

[0073] Taking the satellite speaker receiving module in a soundbar system as an example, the two antennas installed on the satellite speaker may be located on different sides of the speaker housing. As the speaker is placed in different positions in the room, the spatial orientation and distance of the two antennas relative to the soundbar transmitting module are different, resulting in differences in the signal quality received by the two antennas. After comparing the signal-to-noise ratio and signal strength of the signals received by the two antennas, the main control chip selects the antenna with better signal quality as the target receiving antenna, thereby improving downlink throughput and reception capability, and ensuring the stability of audio transmission in complex spatial environments.

[0074] Based on the same inventive concept, embodiments of the present invention provide a wireless audio communication method applied to a wireless audio transmission system. The wireless audio transmission system includes a sound source device, a wireless audio module, and an audio output device. The wireless audio module is connected to the sound source device or the audio output device via an audio interface. The wireless audio module includes a main control chip and a radio frequency (RF) front-end chip. The main control chip is connected to the RF front-end chip, and the RF front-end chip has an antenna interface for connecting an antenna. The method includes, as follows: Figure 5 The following steps are shown: Step S110: The main control chip switches between the StarFlash protocol and the Bluetooth protocol. In transmit mode, the RF front-end chip is controlled to switch to transmit mode, receive audio data from the audio source device through the audio interface, process the audio data according to the StarFlash protocol and / or Bluetooth protocol to generate an RF signal to be transmitted, and transmit it to the RF front-end chip in receive mode. In receive mode, the RF front-end chip is controlled to switch to receive mode, receive the RF signal sent by the RF front-end chip in transmit mode, decode the RF signal according to the StarFlash protocol and / or Bluetooth protocol to restore the audio data, and output it to the audio output device through the audio interface.

[0075] Step S120: In the transmit state, the RF front-end chip processes the RF signal from the main control chip and outputs it to the antenna via the antenna interface. In the receive state, it processes the RF signal from the antenna via the antenna interface and transmits it to the main control chip.

[0076] The steps of the above-described wireless audio communication method have been described in detail in the embodiments of the wireless audio module provided in this specification, and will not be elaborated here.

[0077] The present invention has at least the following beneficial effects: The wireless audio module provided in this invention adopts an architecture of a main control chip paired with an RF front-end chip. The main control chip controls the RF front-end chip to switch between two different communication protocols: StarFlash and Bluetooth. In transmit mode, the appropriate communication protocol is selected for processing based on the type of audio data. In receive mode, the protocol type of the RF signal is identified and the appropriate protocol is selected for decoding. This achieves compatibility support for both StarFlash and Bluetooth communication methods on the same module. By flexibly selecting suitable communication protocols for different application scenarios, the applicability of the wireless audio module is effectively expanded, while reducing the development complexity and material costs of terminal products when adapting to various usage requirements.

[0078] In the several embodiments provided by this invention, it should be understood that the disclosed apparatus and methods can also be implemented in other ways. The apparatus embodiments described above are merely illustrative; for example, the flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods, and computer program products according to various embodiments of the invention. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order than those marked in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram and / or flowchart, and combinations of blocks in block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

[0079] In addition, the functional modules in the various embodiments of the present invention can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0080] If the aforementioned functions are implemented as software functional modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0081] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A wireless audio module, characterized in that, The wireless audio module is used in a wireless audio transmission system, which further includes a sound source device and an audio output device. The wireless audio module is connected to the sound source device or the audio output device through an audio interface. The wireless audio module includes a main control chip and a radio frequency front-end chip. The main control chip is connected to the radio frequency front-end chip, and the radio frequency front-end chip is provided with an antenna interface for connecting an antenna. The main control chip is used to switch between the StarFlash protocol and the Bluetooth protocol; In transmit mode, the RF front-end chip is controlled to switch to transmit mode, receive audio data from the audio source device through the audio interface, process the audio data according to the StarFlash protocol and / or Bluetooth protocol to generate an RF signal to be transmitted, and transmit it to the RF front-end chip in receive mode; and in receive mode, the RF front-end chip is controlled to switch to receive mode, receive the RF signal sent by the RF front-end chip in transmit mode, decode the RF signal according to the StarFlash protocol and / or Bluetooth protocol to restore the audio data, and output it to the audio output device through the audio interface; The radio frequency front-end chip is used to process the radio frequency signal from the main control chip in the transmission state and output it to the antenna via the antenna interface; In addition, in the receiving state, the radio frequency signal from the antenna via the antenna interface is received, processed, and transmitted to the main control chip.

2. The wireless audio module as described in claim 1, characterized in that, The audio interface includes a first I2S interface and a second I2S interface; the main control chip is also used for: In the transmission mode, audio data from the audio source device is received individually through the first I2S interface, or audio data from the audio source device is received simultaneously through the first I2S interface and the second I2S interface. When the first I2S interface receives data alone, the audio data is three-channel audio data and is carried in TDM signals on the same set of I2S data lines; when the first I2S interface and the second I2S interface receive data simultaneously, the left channel, right channel and bass channel of the audio data are respectively distributed and transmitted on two sets of I2S data lines.

3. The wireless audio module as described in claim 1, characterized in that, The RF front-end chip internally includes a power amplifier path and a first bypass path; the main control chip is also used for: In the transmission mode, the signal strength and signal-to-noise ratio fed back by the wireless audio module in the reception mode are obtained; Based on the automatic rate adaptation algorithm, the target transmit power level and the corresponding target modulation and coding scheme are determined according to the signal strength and the signal-to-noise ratio. When the target transmit power level is higher than a preset threshold, the radio frequency front-end chip is controlled to transmit through the power amplifier path; When the target transmit power level is not higher than the preset threshold, the radio frequency front-end chip is controlled to transmit through the first bypass path.

4. The wireless audio module as described in claim 1, characterized in that, The RF front-end chip internally includes a low-noise amplifier path and a second bypass path; the main control chip is also used for: In the receiving mode, the relationship between the signal strength of the received radio frequency signal and a preset signal strength threshold is determined; When the signal strength is lower than a preset signal strength threshold, the radio frequency front-end chip is controlled to receive and process the radio frequency signal through the low noise amplifier path; When the signal strength is not lower than the preset signal strength threshold, the radio frequency front-end chip is controlled to receive and process the radio frequency signal through the second bypass path.

5. The wireless audio module as described in claim 1, characterized in that, The antenna interface includes a first antenna interface and a second antenna interface; the main control chip is also used for: In the transmission mode, the transmit antenna signal quality information fed back by the wireless audio module in the receiving mode is obtained, wherein the transmit antenna signal quality information includes the first antenna signal quality information corresponding to the first antenna interface and the second antenna signal quality information corresponding to the second antenna interface; By comparing the first antenna signal quality information with the second antenna signal quality information, the antenna interface corresponding to the transmit antenna signal quality information with higher signal quality is selected as the target transmit antenna interface, and the RF front-end chip is controlled to transmit test signals through the target transmit antenna interface.

6. The wireless audio module as described in claim 5, characterized in that, The main control chip is also used for: In the receiving mode, the receiving antenna signal quality information fed back by the wireless audio module in the transmitting mode is obtained, wherein the receiving antenna signal quality information includes the third antenna signal quality information corresponding to the first antenna interface and the fourth antenna signal quality information corresponding to the second antenna interface. By comparing the signal quality information of the third antenna with that of the fourth antenna, the antenna interface corresponding to the receiving antenna with higher signal quality is selected as the target receiving antenna interface, and the RF front-end chip is controlled to receive the test signal through the target receiving antenna interface.

7. The wireless audio module as described in claim 1, characterized in that, The main control chip is also used for: In the transmission mode, the audio data type of the audio data is determined, and the audio data type includes lossless multi-channel data type and ordinary data type; When the audio data type is the lossless multi-channel data type, the audio data is transmitted through the StarFlash protocol; when the audio data type is the ordinary data type, the audio data is transmitted through the Bluetooth protocol. In the receiving mode, the signal protocol type of the radio frequency signal is determined; Based on the signal protocol type, the radio frequency signal is determined to be decoded using either the StarFlash protocol or the Bluetooth protocol.

8. The wireless audio module as described in claim 1, characterized in that, The Bluetooth protocol includes the classic Bluetooth protocol and the Bluetooth Low Energy protocol, and the main control chip is also used for: In the transmission mode, the mobile terminal is connected via the classic Bluetooth protocol, audio data from the mobile terminal is received, the audio data is processed according to the classic Bluetooth protocol, and then transmitted to the radio frequency front-end chip for transmission. In the receiving mode, the device communicates with the wireless audio module in the receiving mode via the Bluetooth Low Energy protocol for ranging and angle measurement. Based on the ranging and angle measurement results, the spatial position of the audio output device is determined, and sound field calibration parameters are generated based on the spatial position to perform equalization processing on the audio output by the audio output device.

9. A wireless audio communication method, characterized in that, An application is made in a wireless audio transmission system, the wireless audio transmission system including a sound source device, a wireless audio module, and an audio output device, wherein the wireless audio module is connected to the sound source device or the audio output device via an audio interface; the wireless audio module includes a main control chip and a radio frequency front-end chip, the main control chip being connected to the radio frequency front-end chip, and the radio frequency front-end chip having an antenna interface for connecting an antenna; the method includes: The main control chip switches between the StarFlash protocol and the Bluetooth protocol. In transmit mode, it controls the RF front-end chip to switch to transmit mode, receives audio data from the audio source device through the audio interface, processes the audio data according to the StarFlash protocol and / or Bluetooth protocol to generate an RF signal to be transmitted, and transmits it to the RF front-end chip in receive mode. In receive mode, it controls the RF front-end chip to switch to receive mode, receives the RF signal sent by the RF front-end chip in transmit mode, decodes the RF signal according to the StarFlash protocol and / or Bluetooth protocol to restore the audio data, and outputs it to the audio output device through the audio interface. The radio frequency front-end chip transmits radio frequency signals from the main control chip in the transmit state and outputs them to the antenna via the antenna interface; and in the receive state, it receives radio frequency signals from the antenna via the antenna interface and transmits them to the main control chip.

10. A wireless audio transmission system, characterized in that, The wireless audio transmission system includes a sound source device, a wireless audio module, and an audio output device. The wireless audio module is connected to the sound source device or the audio output device through an audio interface. The wireless audio module includes a main control chip and a radio frequency front-end chip. The main control chip is connected to the radio frequency front-end chip, and the radio frequency front-end chip is provided with an antenna interface for connecting an antenna. The main control chip is used to switch between the StarFlash protocol and the Bluetooth protocol; In transmit mode, the RF front-end chip is controlled to switch to transmit mode, receive audio data from the audio source device through the audio interface, process the audio data according to the StarFlash protocol and / or Bluetooth protocol to generate an RF signal to be transmitted, and transmit it to the RF front-end chip in receive mode; and in receive mode, the RF front-end chip is controlled to switch to receive mode, receive the RF signal sent by the RF front-end chip in transmit mode, decode the RF signal according to the StarFlash protocol and / or Bluetooth protocol to restore the audio data, and output it to the audio output device through the audio interface; The radio frequency front-end chip is used to process the radio frequency signal from the main control chip in the transmission state and output it to the antenna via the antenna interface; In addition, in the receiving state, the radio frequency signal from the antenna via the antenna interface is received, processed, and transmitted to the main control chip; The audio source device is used to generate the audio data and send the audio data to the main control chip of the wireless audio module in the transmission mode through the audio interface; The audio output device is used to receive audio data sent by the main control chip of the wireless audio module in the receiving mode, and to play the audio data.

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