A multi-channel UWB wireless earphone system, a wireless transceiver and a wireless earphone

Abstract

The application discloses a multi-channel UWB wireless earphone system, a wireless transceiver and a wireless earphone, relates to the technical field of wireless earphones, and solves the technical problems of insufficient wireless bandwidth, sound quality and excessively high wireless delay when a multi-channel surround sound system audio is transmitted by using the existing wireless earphone Bluetooth wireless audio technology. The multi-channel wireless earphone system comprises a host computer, a wireless transceiver and a wireless earphone. The host computer sends one-channel uncompressed audio data to the wireless transceiver and receives voice data. The wireless transceiver encapsulates the one-channel uncompressed audio data into a downlink audio data frame. The wireless earphone is in communication connection with the wireless transceiver through a UWB wireless communication link, the physical layer transmission rate of the wireless earphone is greater than the code rate of the one-channel uncompressed audio data, the voice data is encapsulated into an uplink voice data frame, a downlink period, an uplink period and a guard interval are sequentially arranged in each frame period, the downlink period is used for sending the downlink audio data frame, the uplink period is used for sending the uplink voice data frame, and the frame period is less than 2ms.

Description

Technical Field

[0001] This invention relates to the field of wireless headphone technology, and more particularly to a multi-channel UWB wireless headphone system, a wireless transceiver, and wireless headphones. Background Technology

[0002] To achieve a better surround sound experience, multi-channel surround sound systems (such as 3.1, 5.1, 7.1, and 9.1 channels) have incorporated an increasing number of channels. Among them, the 7.1-channel surround sound system (abbreviated as 7.1 channel) is a widely used multi-channel audio format in home theaters, gaming, and virtual reality. It includes eight channels: Front Left (FL), Front Right (FR), Center (C), Low Frequency Effects (LFE), Left Surround (SL), Right Surround (SR), Left Rear (RL), and Right Rear (RR), providing a precise omnidirectional spatial audio experience encompassing front, rear, left, right, and low frequencies. The 9.1-channel surround sound system further adds a front top channel and a front widening channel to the 7.1-channel surround sound system.

[0003] Most existing wireless headphone systems use Bluetooth wireless audio technology to transmit multi-channel audio signals. When applied to the aforementioned multi-channel surround sound system, the bandwidth of Bluetooth wireless audio technology (the wider the bandwidth, the higher the maximum transmission rate; maximum transmission rate = bandwidth × ...) is crucial. (1+Signal-to-noise ratio) cannot meet the requirements of so many audio channels. For example, the bit rate of the 8-channel audio signal of a 7.1-channel surround sound system at a sampling rate of 48kHz and a bit depth of 16bit is approximately 6.144Mbps. Existing Bluetooth wireless audio technologies, such as the A2DP (Advanced Audio Distribution Profile) protocol, support a maximum transmission rate of approximately 328kbps. Even with high-definition Bluetooth encoding technologies such as aptX HD (Qualcomm aptX High Definition Audio Codec) and LDAC (Low Resolution Audio Coding Technology), the transmission rate is only about 990kbps, which is far lower than the bit rate required for uncompressed transmission of a 7.1-channel surround sound system. Therefore, only compressed stereo audio can be transmitted. Lossy compression will degrade audio data, reduce sound quality, and compromise the synchronization of multi-channel signals. In addition, the end-to-end latency of Bluetooth wireless audio technology is typically between 100ms and 300ms. Even with Bluetooth LE Audio (Low Power Audio) in low-latency mode, the latency is still in the range of 20ms to 50ms. For applications such as games and movies that require extremely high audio-visual synchronization, this will seriously damage the user experience. Furthermore, the compression and decompression processes during audio compression transmission will further increase the latency.

[0004] In the process of realizing this invention, the inventors discovered at least the following problems in the prior art: Existing wireless headphones using Bluetooth wireless audio technology suffer from insufficient wireless bandwidth, poor sound quality, and excessively high wireless latency when transmitting audio from multi-channel surround sound systems. Summary of the Invention

[0005] The purpose of this invention is to provide a multi-channel UWB wireless headphone system, a wireless transceiver, and wireless headphones to solve the technical problems of insufficient wireless bandwidth, poor sound quality, and excessively high wireless latency in existing wireless headphone Bluetooth wireless audio technology when transmitting audio from multi-channel surround sound systems (such as 3.1 channels, 5.1 channels, 7.1 channels, 9.1 channels, etc.). The various technical effects of the preferred solutions among the many technical solutions provided by this invention are detailed below.

[0006] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a multi-channel UWB wireless headphone system, comprising: a main unit, wiredly connected to a wireless transceiver, for transmitting data to the wireless transceiver. The uncompressed audio data of each channel, and the voice data uploaded by the wireless transceiver; It is a positive integer greater than or equal to 4; the wireless transceiver will... Each channel's uncompressed audio data is encapsulated into downlink audio data frames; the wireless headset, wirelessly connected to the wireless transceiver via a UWB wireless communication link, encapsulates the collected voice data into uplink voice data frames; wherein, the UWB wireless communication link supports a physical layer transmission rate greater than that of the aforementioned transceiver. The bit rate of uncompressed audio data for each channel is set, and it operates in TDD full-duplex communication mode. The TDD full-duplex communication mode is configured with a downlink period, an uplink period and a guard interval in each frame period. During the downlink period, the wireless transceiver sends the downlink audio data frame to the wireless headset, and during the uplink period, the wireless headset sends the uplink voice data frame to the wireless transceiver. The frame period is less than 2ms.

[0007] Preferably, the downlink time period is greater than the sum of the uplink time period and the protection interval.

[0008] Preferably, both the wireless transceiver and the wireless earphone use pulse position modulation to transmit data frames; wherein, during the downlink period, the wireless transceiver modulates the downlink audio data frame into a downlink pulse signal and transmits it to the wireless earphone; during the uplink period, the wireless earphone modulates the uplink voice data frame into an uplink pulse signal and transmits it to the wireless transceiver.

[0009] Preferably, the frame period For 1ms, the Each channel is one of the eight channels in a 7.1 channel surround sound system, and the duration of the downlink time period is... The duration of the uplink period is 700 μs. The duration of the protection interval is 200 μs. The value is 100 μs.

[0010] Preferably, the wireless transceiver includes: a wired interface controller for receiving data from the host. The system provides uncompressed audio data for each channel, and transmits the format-converted voice data to the host; an audio decoder, communicatively connected to the wired interface controller, processes the audio data received by the wired interface controller. The system performs format parsing and buffer management on the uncompressed audio data of each channel; it also performs format conversion on the voice data sent by the main control chip; the main control chip then processes the parsed data within the current frame period. Each channel's uncompressed audio data is encapsulated into downlink audio data frames, at the same time point Uncompressed audio data from each channel is encapsulated in the same downlink audio data frame; the uplink voice data frame received in the current frame period is decapsulated to obtain voice data, and the voice data is sent to the audio decoder; the UWB transmitting radio frequency front-end converts the downlink audio data frame into a downlink pulse signal using pulse position modulation during the downlink period and sends it to the wireless headset; the UWB receiving radio frequency front-end receives the uplink pulse signal sent by the wireless headset during the uplink period, demodulates the uplink pulse signal to obtain the uplink voice data frame and sends it to the main control chip.

[0011] Preferably, the wireless earphone includes: a multi-speaker acoustic structure, including multiple speakers symmetrically arranged on speaker disks on both sides of the wireless earphone; a driving circuit electrically connected to the multiple speakers respectively; an earphone receiving radio frequency front end, which receives the downlink pulse signal during the downlink period of the current frame period and demodulates the downlink pulse signal to obtain a demodulated downlink audio data frame; a microphone module for acquiring voice data of the current frame period; and an audio processor, which decrypts the demodulated downlink audio data frame during the downlink period of the current frame period to obtain... The uncompressed audio data of each channel is processed according to a preset channel-speaker correspondence. The uncompressed audio data of each channel is channel-assigned to obtain channel signals corresponding to multiple speakers. The driving circuit converts each channel signal into a driving electrical signal and inputs it into its corresponding speaker. During the uplink period of the current frame cycle, the voice data is encapsulated into an uplink voice data frame. The headphone transmitting radio frequency front end converts the uplink voice data frame into an uplink pulse signal using pulse position modulation during the uplink period of the current frame cycle and sends it to the wireless transceiver.

[0012] Preferably, before converting the channel signals into driving electrical signals using the driving circuit and inputting them into their respective corresponding speakers, the audio processor further performs: sound effect processing on the channel signals corresponding to the multiple speakers, the sound effect processing including equalizer adjustment processing, dynamic range compression processing, and spatial sound field enhancement processing on the multiple channel signals in sequence.

[0013] Preferably, the wired interface controller is a USB interface controller.

[0014] The present invention provides a wireless transceiver, comprising: a wired interface controller for receiving signals from a host. Uncompressed audio data for each channel, and voice data that has been converted to the correct format and sent to the host. A positive integer greater than or equal to 4; an audio decoder, communicatively connected to the wired interface controller, for processing the audio received by the wired interface controller. The system performs format parsing and buffer management on the uncompressed audio data of each channel; it performs format conversion on the voice data sent by the main control chip; the main control chip then processes the parsed audio data within the current frame period. Each channel's uncompressed audio data is encapsulated into downlink audio data frames, and the data at the same time point... Uncompressed audio data from each channel is encapsulated in the same downlink audio data frame; the uplink voice data frame received in the current frame period is decapsulated to obtain voice data, which is then sent to the audio decoder; the UWB transmitting RF front-end converts the downlink audio data frame into a downlink pulse signal using pulse position modulation during the downlink period of the frame period and sends it to the wireless headset; the UWB receiving RF front-end receives the uplink pulse signal sent by the wireless headset during the uplink period of the frame period, demodulates the uplink pulse signal to obtain the uplink voice data frame, and sends it to the main control chip; wherein, the UWB transmitting RF front-end and the UWB receiving RF front-end operate in TDD full-duplex communication mode, and the TDD full-duplex communication mode sequentially sets the downlink period, the uplink period, and the guard interval in each frame period, the downlink period being greater than the sum of the uplink period and the guard interval, and the frame period being less than 2ms.

[0015] This invention provides a wireless earphone, comprising: a multi-speaker acoustic structure including multiple speakers symmetrically arranged on speaker disks on both sides of the wireless earphone; a driving circuit electrically connected to the multiple speakers; an earphone receiving radio frequency front-end, which receives downlink pulse signals transmitted by a wireless transceiver during the downlink period of the current frame cycle and demodulates the downlink pulse signals to obtain demodulated downlink audio data frames; a microphone module for acquiring voice data of the current frame cycle; and an audio processor, which decrypts the demodulated downlink audio data frames during the downlink period of the current frame cycle to obtain... The uncompressed audio data of each channel is processed according to a preset channel-speaker correspondence. The uncompressed audio data of each channel is channel-assigned to obtain channel signals corresponding to multiple speakers. The driving circuit is used to convert each channel signal into a driving electrical signal and input it to the corresponding speaker. During the uplink period of the current frame cycle, the voice data is encapsulated into an uplink voice data frame. The value is a positive integer greater than or equal to 4; the headphone transmitting radio frequency front-end, during the uplink period of the current frame cycle, uses pulse position modulation to convert the uplink voice data frame into an uplink pulse signal and sends it to the wireless transceiver; wherein, the headphone receiving radio frequency front-end and the headphone transmitting radio frequency front-end operate in TDD full-duplex communication mode, the TDD full-duplex communication mode is configured with the downlink period, the uplink period and the guard interval in each frame cycle, the frame cycle is less than 2ms, and the downlink period is greater than the sum of the uplink period and the guard interval.

[0016] Implementing one of the above-described technical solutions of the present invention has the following advantages or beneficial effects: This application uses a physical layer transmission rate greater than A UWB (Ultra-Wideband) wireless communication link with a bit rate of 1:10 ... indivual( ≥4) The audio data channel provides sufficient bandwidth. The UWB wireless communication link adopts TDD (Time Division Duplexing) full-duplex communication mode. Based on sufficient bandwidth, time division multiplexing is used to divide the frame period into downlink time period, uplink time period, and guard interval. The downlink time period transmits the complete and uncompressed data to the wireless headset. The system encapsulates uncompressed audio data from each channel into downlink audio data frames to preserve surround sound quality. During the uplink period, it transmits uplink voice data frames encapsulated from voice data to the wireless transceiver. At the same time, guard intervals are used to prevent radio frequency crosstalk and inter-symbol interference during uplink / downlink switching. The frame period is less than 2ms, which is much lower than the end-to-end latency of traditional Bluetooth technology (100ms to 300ms). This enables near real-time transmission of audio and voice data, thereby achieving a balance between high-fidelity multi-channel surround sound and low-latency wireless communication. This solves the problem that existing Bluetooth wireless audio technology cannot meet the high-quality wireless transmission requirements of multi-channel surround sound systems (such as 3.1-channel, 5.1-channel, and 7.1-channel audio modes) due to insufficient bandwidth and high latency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings: Figure 1 This is a system block diagram of the multi-channel wireless headphone system provided in Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of frame period division in the TDD duplex communication mode of Embodiment 1 of the present invention; Figure 3 This is a schematic diagram of the frame period structure when the frame period is 1ms in Embodiment 1 of the present invention; Figure 4 This is a schematic diagram of the internal structure of the wireless transceiver in Embodiment 1 of the present invention; Figure 5 This is a schematic diagram of the internal structure of the wireless earphone in Embodiment 1 of the present invention. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the present invention clearer, various exemplary embodiments described below will be referenced to the accompanying drawings, which form part of the exemplary embodiments, illustrating various exemplary embodiments that may be used to implement the present invention. Unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the disclosure of the present invention. It should be understood that they are merely examples of processes, methods, and apparatuses consistent with some aspects of the present invention disclosed as detailed in the appended claims, and other embodiments may be used, or structural and functional modifications may be made to the embodiments listed herein without departing from the scope and spirit of the present invention.

[0019] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," etc., indicate the orientation or positional relationship based on the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the referred element must have a specific orientation, or be constructed and operated in a specific orientation. The terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. The term "multiple" means two or more. The terms "connected" and "linked" should be interpreted broadly, for example, they can be fixed connections, detachable connections, integral connections, mechanical connections, electrical connections, communication connections, direct connections, indirect connections through an intermediate medium, and can be the internal connection of two elements or the interaction relationship between two elements. The term "and / or" includes any and all combinations of one or more of the related listed items. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0020] To illustrate the technical solution described in this invention, specific embodiments are described below, showing only the parts related to the embodiments of this invention.

[0021] Example 1: like Figure 1 As shown, the present invention provides a multi-channel UWB wireless headphone system, including: a host unit, which is wiredly connected to a wireless transceiver for transmitting data to the wireless transceiver. Uncompressed audio data for each channel, and voice data received from the wireless transceiver; A positive integer greater than or equal to 4; a wireless transceiver used to receive signals transmitted by the host. Uncompressed audio data for each channel, Each channel's uncompressed audio data is encapsulated into downlink audio data frames. After receiving the uplink voice data frames from the wireless headset, the wireless transceiver decapsulates them to obtain the voice data, and then performs format conversion on the voice data, such as packetization, to conform to the wired communication protocol between the host and the wireless transceiver. The wireless headset, wirelessly connected to the wireless transceiver via a UWB wireless communication link, encapsulates the collected voice data into uplink voice data frames. After receiving the downlink audio data frames from the wireless transceiver, the wireless headset decapsulates them to obtain the voice data. Each channel of uncompressed audio data, based on The uncompressed audio data of each channel obtains the corresponding driving electrical signals for each speaker within it, driving each speaker to produce sound. By combining the sound from all speakers, a real-time stereo surround sound effect is generated. The UWB wireless communication link supports a physical layer transmission rate greater than [missing information - likely a specific data rate]. The system transmits uncompressed audio data at a bitrate for each channel and operates in TDD full-duplex communication mode. In TDD full-duplex communication mode, each frame period sequentially includes a downlink period, an uplink period, and a guard interval. During the downlink period, the wireless transceiver sends downlink audio data frames to the wireless headset, and during the uplink period, the wireless headset sends uplink voice data frames to the wireless transceiver. The frame period is less than 2ms. TDD stands for Time Division Full-Duplex.

[0022] In this embodiment, the wireless headset is equipped with multiple speakers and one or more microphones. The multiple speakers are arranged in different spatial positions. The multiple speakers are driven to output sound signals according to the received downlink audio data frames to form stereo surround sound. The voice data collected by the microphone is sent to the wireless transceiver during the uplink period and then forwarded to the host by the wireless transceiver.

[0023] In this embodiment, the host is not limited to a PC, tablet computer, smart terminal, etc. The host and the wireless transceiver are not limited to wired communication connection via USB interface (USB 2.0 and above), serial interface (RS-232, RS-485), or audio interface (AUX).

[0024] Uncompressed audio data is not limited to PCM (Pulse-Code Modulation) audio data, FLAC (Free Lossless Audio Codec), or APE (Monkey's Audio) audio data. Correspondingly, the voice data and uncompressed audio data use the same encoding format, such as PCM format.

[0025] The host outputs audio in 3.1 channel, 5.1 channel, 7.1 channel, and 9.1 channel formats. Uncompressed audio data for each channel. 3.1 channel includes 4 channels, 5.1 channel includes 6 channels, 7.1 channel includes 8 channels, and 9.1 channel includes 10 channels. Select This is because existing Bluetooth audio technologies (including A2DP, aptX HD, LDAC, etc.) are all designed for stereo (2-channel) transmission, with a maximum effective transmission rate of approximately 990kbps. However, the bitrate of 3.1-channel uncompressed audio data at a sampling rate of 48kHz and a bit depth of 16bit reaches 3.072Mbps (sampling rate × number of channels × bit depth), exceeding the effective transmission rate of Bluetooth by more than three times. Therefore, those skilled in the art generally consider multi-channel (≥4 channels) uncompressed wireless audio transmission impractical for consumer products.

[0026] Therefore, this embodiment selects It is not limited to 4, 6, 8, or 10 channels to cover multi-channel formats such as 3.1, 5.1, 7.1, and 9.1 channels. By introducing a UWB wireless communication link with a physical layer transmission rate greater than the uncompressed audio bitrate, sufficient bandwidth is obtained to transmit uncompressed and completely. Each channel of uncompressed audio data is transmitted to wireless headphones.

[0027] It should be noted that, in addition to the UWB wireless communication link, this invention can also employ WiGig (Wireless Gigabit) technology or a proprietary 2.4GHz wireless solution to construct a high-speed wireless communication link between the wireless transceiver and the wireless headset for transmission. Uncompressed audio and voice data for each channel. WiGig operates in the 60GHz band, with a theoretical rate of up to 7Gbps, but WiGig technology has poor penetration and high power consumption. 2.4GHz proprietary wireless solutions are non-standard, proprietary wireless communication protocols developed by manufacturers in the 2.4GHz band, not adhering to common standards such as Bluetooth or Wi-Fi, to achieve specific performance goals (such as ultra-low latency). However, UWB wireless communication links offer superior latency and bandwidth compared to 2.4GHz proprietary wireless solutions. UWB technology transmits data by transmitting nanosecond-level extremely narrow pulses, without using traditional sinusoidal carrier modulation. Its operating frequency band is 3.1GHz to 10.6GHz, with an instantaneous physical layer transmission rate of no less than 128Mbps, end-to-end latency of approximately 1ms, and a power spectral density below -41.3dBm / MHz.

[0028] Taking the 7.1 channel multi-channel audio format, which is widely used in home theaters, games, and virtual reality, as an example, it includes 8 channels, a sampling rate of 48kHz, and a bit depth of 16bit. The bit rate of the uncompressed audio data of the 8 channels of 7.1 channel is 8 × 48000 × 16 = 6.144Mbps. If the UWB technology takes its physical layer transmission rate lower limit of 128Mbps, then the link margin = 128Mbps / 6.144Mbps ≈ 20.8 times, which meets the requirements of uncompressed real-time transmission of 8 channels of 7.1 channel audio data and protocol overhead.

[0029] In this embodiment, after the wireless transceiver establishes a UWB wireless communication link with the wireless headset, it operates in TDD full-duplex communication mode, transmitting a large amount of data obtained by the wireless transceiver. The uncompressed audio data of each channel is used as downlink data, while the relatively small amount of voice data collected by the microphone module at the wireless headset end is used as uplink data. Downlink and uplink data are transmitted in a time-division manner to achieve full-duplex operation. Figure 2 This diagram illustrates the time segmentation of a frame period in TDD full-duplex communication mode, in order to ensure complete and real-time transmission. The uncompressed audio data of each channel is sent to the wireless headphones. Preferably, the downlink time period is longer than the sum of the uplink time period and the guard interval, and the guard interval is used to prevent radio frequency crosstalk and inter-symbol interference during uplink and downlink switching.

[0030] In a preferred embodiment of the invention, the wireless transceiver receives 7.1-channel PCM audio data from the host via a USB interface controller. The host transmits audio data packets at intervals of 1ms or 125μs according to the USB Audio Class 2.0 standard. If the frame period is too long (e.g., greater than 2ms), the wireless transceiver needs to internally buffer multiple USB audio data packets before encapsulating them into a single UWB data frame, which introduces additional buffering latency. If the frame period is too short (e.g., less than the minimum interval of 125μs for USB audio data packets), it may not be possible to fully transmit the data within a single frame period. Each channel ( ≥4) contains all uncompressed audio data, and frequent frame switching increases protocol overhead and power consumption. Therefore, setting the frame period to less than 2ms ensures complete transmission. Each channel ( ≥4) of all uncompressed audio data, and avoid introducing additional latency due to over-buffering.

[0031] Furthermore, the human ear is extremely sensitive to sound latency. To ensure audio-visual synchronization and a seamless listening experience, the end-to-end latency of a wireless audio transmission system should be controlled to within milliseconds. The frame period, as a crucial component of end-to-end latency, directly determines the lower limit of system latency. Setting the frame period to less than 2ms allows the end-to-end latency of the entire transmission link to be controlled within 5ms, below the human ear's threshold for perceiving audio-visual asynchrony. A UWB physical layer frame (PPDU) consists of three parts: the synchronization header (SHR), the physical layer header (PHR), and the physical layer serving data unit (PSDU). In the IEEE 802.15.4a standard, the typical data frame transmission time is approximately 486μs to 742μs. If the frame period is less than the minimum transmission time of a UWB physical frame, a complete transmission and reception of a single frame of UWB data cannot be completed within a single frame period. If the frame period is too long, it will significantly increase the end-to-end latency.

[0032] In summary, setting the frame period to less than 2ms was determined after a comprehensive consideration of three factors: the USB clock synchronization period (1ms), the human ear's perception threshold for audio-visual asynchrony (approximately 5ms), and the UWB physical frame transmission time (approximately 0.5ms to 0.8ms). Setting the frame period to less than 2ms allows for the complete transmission of the UWB physical frame (including the synchronization header, frame header, and payload) while keeping the end-to-end latency below the human ear's perception threshold for audio-visual asynchrony. However, the end-to-end latency of existing Bluetooth A2DP protocols is typically between 100ms and 300ms. Even with low-latency modes like aptX LL (aptX Low Latency) or Bluetooth LE Audio (Low Power Audio), the latency remains in the range of 20ms to 50ms. These latency levels far exceed the human ear's perception threshold for audio-visual asynchrony, resulting in a poor user experience in scenarios with high requirements for audio-visual synchronization, such as gaming and movie watching.

[0033] In this preferred embodiment of Example 1, both the wireless transceiver and the wireless headset use pulse position modulation to transmit data frames. Specifically, during the downlink phase, the wireless transceiver modulates the downlink audio data frames into downlink pulse signals and transmits them to the wireless headset. During the uplink phase, the wireless headset modulates the uplink voice data frames into uplink pulse signals and transmits them to the wireless transceiver.

[0034] In this preferred embodiment, Pulse Position Modulation (PPM) is a modulation method that encodes data by changing the precise position of a pulse on the time axis, thereby improving the noise immunity of uplink and downlink pulse signals in UWB wireless communication links. The UWB transmitting RF front-end maps the binary data (0s and 1s) in the downlink audio data frame to the position offset of an extremely narrow, nanosecond-level pulse on the time axis. For example, a pulse arriving earlier than expected represents 0, and arriving later represents 1. Because the UWB pulse width is only on the nanosecond level, PPM can achieve extremely high time resolution and data transmission rates. Demodulation is the reverse process of PPM. The UWB receiving RF front-end detects the precise position of the received pulse on the time axis using a high-precision time-to-digital converter (TDC), differs from the theoretical position to obtain the pulse position offset, and restores the pulse position offset to binary data, thus recovering the uplink voice data frame. The modulation and demodulation of PPM are existing technologies and will not be described in detail here.

[0035] In another preferred embodiment of this example, Each channel is one of the eight channels in a 7.1-channel surround sound system, with a frame period configured at 1ms, perfectly matching the 1ms frame interval of USB Audio 2.0 full-speed devices. This ensures that the wireless transceiver can promptly transmit received audio within each USB audio frame period. Each channel of uncompressed audio data is encapsulated into downlink audio data frames for the UWB wireless communication link and transmitted without the need for additional cross-frame buffering. This avoids the additional latency caused by buffering and resampling, allowing the end-to-end transmission latency to be controlled to approximately 1ms.

[0036] In this preferred embodiment, the frame period structure is as follows: Figure 3 As shown, the duration of the downlink period The duration of the uplink period is 700 μs. The protection interval is 200 μs. Figure 3 The duration of Gl in The value is 100 μs. .

[0037] The uncompressed audio data bitrate of the 8 channels in the 7.1 channel surround sound system is 6.144 Mbps, requiring 6144 bits (768 bytes) of data to be transmitted within a 1ms frame period. The UWB physical layer transmission rate is 128 Mbps, with a theoretical transmission time of approximately 48 μs. Considering protocol overhead such as synchronization headers, frame headers, and CRC (Cyclic Redundancy Check) (approximately 400 to 500 μs) and RF transceiver switching time (approximately 50 μs), the downlink timeframe is set to 700 μs, providing ample transmission margin to ensure complete and reliable transmission of audio data within the current frame period.

[0038] In other examples, the frame period can also be adjusted within a range greater than or equal to 500 μs and less than 2 ms, depending on the specific application scenario and hardware configuration. For example, the frame period T = 1.5 ms, which is the duration of the downlink session. The duration of the uplink period is 1000 μs. The protection interval is 300 μs. The value is 200μs, as long as the frame period is less than 2ms and the downlink time period is greater than the sum of the uplink time period and the protection interval.

[0039] In another preferred embodiment of this example, such as Figure 4 As shown, the wireless transceiver includes: (1) Wired interface controller, used to receive from the host The controller transmits uncompressed audio data for each channel, as well as format-converted voice data to the host. The wired interface controller has a communication interface through which it is wired to the host's communication port.

[0040] In this preferred embodiment, the wired interface controller is an interface control chip or IP core that enables wired data transmission between the host and the wireless transceiver. Preferably, the wired interface controller is a USB interface controller, which has a USB interface (i.e., the aforementioned communication interface), and its function is to receive data from the host's USB port (i.e., the aforementioned communication port) according to the USB Audio Device Class 2.0 (UAC 2.0) specification. The system transmits uncompressed audio data (PCM audio data) from each channel and then transmits the converted audio data back to the host via the USB port. The wired interface controller is not limited to the C-Media CM6637 chip or the Realtek ALC4042 or ALC4050 chip and their peripheral circuitry; these are existing technologies and will not be described further here.

[0041] (2) An audio decoder, which is communicatively connected to the wired interface controller, receives audio from the wired interface controller. The system performs format parsing and buffer management on uncompressed audio data from each channel; and performs format conversion on voice data sent by the main control chip.

[0042] In this preferred embodiment, the audio decoder refers to an audio data format conversion and buffer management chip, and is not limited to a single-chip solution that integrates USB audio decoding function, such as TI's PCM2912A, or a high-performance USB audio host control chip that supports I2S (integrated audio bus), PCM (pulse code modulation) and USB interface, such as SAVITECH's SA9227. These chips integrate clock recovery circuits, FIFO (First In, First Out) buffers and format conversion logic, and can realize bidirectional format conversion between USB audio data and audio data (PCM data).

[0043] In this preferred embodiment, the audio decoder receives data from the wired interface controller. Format parsing of uncompressed audio data for each channel refers to unpacking the audio data packets received from the wired interface controller (in this case, the USB interface controller) and packaged according to the UAC 2.0 specification, extracting the clean audio data. The audio decoder converts the voice data sent by the main control chip into a format that conforms to the USB audio device class specification (adding headers, timestamps, etc.), encapsulates it into a USB audio data packet that conforms to the UAC 2.0 standard, and then sends it to the host through the wired interface controller.

[0044] Buffer management refers to using the FIFO (First-In, First-Out) buffer inside the audio decoder to buffer the data received from the wired interface controller. Uncompressed audio data for each channel. Because USB audio data arrives in packet form, transmission is bursty, while the host chip reads data continuously. Buffer management can smooth out this rate difference and prevent data loss or overflow.

[0045] (3) The main control chip parses the format of the current frame period. Each channel's uncompressed audio data is encapsulated into downlink audio data frames, at the same time point Uncompressed audio data from each channel is encapsulated in the same downlink audio data frame; the uplink voice data received in the current frame period is decapsulated to obtain the voice data, which is then sent to the audio decoder.

[0046] In this preferred embodiment, the main control chip is not limited to an STM32 series microcontroller (such as the STM32U5 series), which has high processing performance and rich peripheral interfaces. The main control chip communicates with the UWB transmitting RF front-end and UWB receiving RF front-end via SPI (Serial Peripheral Interface) or parallel bus, and connects to the audio decoder via I2S (Integrated Audio Bus) or PCM (Pulse Code Modulation) interface.

[0047] In this preferred embodiment, at the same time point (with the same timestamp) Uncompressed audio data from each channel is synchronously encapsulated in the same downlink audio data frame, so that at the same time point... Uncompressed audio data from each channel is transmitted synchronously within the same frame period, eliminating the need for additional cross-frame buffering and synchronization processing, thus ensuring the synchronization of audio data across N channels.

[0048] In this preferred embodiment, encapsulation refers to encapsulating the data (after format parsing) to be transmitted via the UWB wireless communication link. The payload consists of uncompressed audio or voice data from each channel, encapsulated into UWB data frames (downlink audio or uplink voice data frames) according to UWB protocol encapsulation requirements. Each frame includes a frame header, sequence number, checksum (CRC checksum), and payload (such as PCM payload). Decapsulation is the reverse process of encapsulation, used to extract the payload from the UWB data frame (downlink audio or uplink voice data frame).

[0049] (4) The UWB transmitting radio frequency front end, during the downlink period, uses pulse position modulation to convert downlink audio data frames into downlink pulse signals and send them to the wireless headset.

[0050] (5) The UWB receiving radio frequency front end receives the uplink pulse signal sent by the wireless headset during the uplink period, demodulates the uplink pulse signal to obtain the uplink voice data frame and sends it to the main control chip.

[0051] In this preferred embodiment, the UWB transmitting RF front-end and the UWB receiving RF front-end can be integrated into the same UWB transceiver chip, such as the Qorvo DW3000 series UWB transceiver chip, and also include receiving and transmitting antennas corresponding to the wireless signal.

[0052] In this preferred embodiment, the format parsing of the current frame period is performed on the main control chip side. Each channel's uncompressed audio data is encapsulated into downlink audio data frames, at the same time point Uncompressed audio data from each channel is encapsulated within the same downlink audio data frame and synchronously transmitted to the wireless headphones within the same frame period. This avoids inter-channel timing misalignment caused by serial encapsulation or time-division transmission, which directly compromises sound image positioning accuracy in multi-channel surround sound systems. Simultaneously, the UWB transmitting and receiving RF front-ends employ pulse position modulation (PPM modulation) / PPM demodulation during the downlink and uplink periods, respectively, to transmit and receive wireless signals. Combined with an audio decoder, this enables the wired interface controller to receive USB audio data in PCM format. Bidirectional format conversion and buffer management between uncompressed audio data in each channel enable the wireless transceiver to transmit data with an end-to-end latency of approximately 1ms, within frame period constraints. Each channel ( ≥4) Uncompressed audio data is transmitted completely and synchronously from the host to the wireless headphones, effectively solving the technical problems of existing Bluetooth solutions that cannot transmit multi-channel uncompressed audio due to insufficient bandwidth and that affect the audio-visual synchronization experience due to excessive latency.

[0053] In another preferred embodiment of this example, such as Figure 5 As shown, the wireless earphones include: (1) Multi-speaker acoustic structure, including multiple speakers symmetrically arranged on the speaker plates on both sides of the wireless earphone.

[0054] (2) The driving circuit is electrically connected to multiple speakers respectively.

[0055] The acoustic structure and driving scheme described above can be referred to in Chinese Patent No. CN117560604A, which discloses an acoustic structure and driving method for a direct-drive six-speaker headphone. This embodiment directly references the acoustic structure and driving connection relationship of that patent, and will not be repeated here.

[0056] (3) The headphone receiving radio frequency front end receives the downlink pulse signal during the downlink period of the current frame cycle and demodulates the downlink pulse signal to obtain the demodulated downlink audio data frame; demodulation refers to the inverse process of pulse position modulation mode, which can be referred to the demodulation process of the aforementioned UWB receiving radio frequency front end, and will not be repeated here.

[0057] (4) Microphone module, used to collect voice data of the current frame period.

[0058] In this preferred embodiment, the microphone module includes at least one microphone unit and an ADC (analog-to-digital converter). The microphone unit is used to acquire analog voice signals, and the ADC converts the analog voice signals into digital voice data (which may be in PCM format). Specifically, the microphone unit can be positioned on the speaker grille near the user's mouth to obtain clear voice signals; alternatively, multiple microphone units can be positioned on the left and right speaker grilles respectively, depending on the product form, to suppress noise.

[0059] (5) The audio processor, during the downlink period of the current frame cycle, decongests and demodulates the downlink audio data frame to obtain... The uncompressed audio data of each channel; according to the preset channel-speaker correspondence, the... Channel allocation is performed on uncompressed audio data for each channel, resulting in channel signals corresponding to multiple speakers. A driving circuit converts each channel signal into a driving electrical signal and inputs it to its corresponding speaker (the specific implementation of the above process can be found in the technical solution of a direct-drive six-speaker headphone acoustic structure and driving method disclosed in Chinese Patent Publication No. CN117560604A, which will not be repeated here). During the uplink period of the current frame cycle, the voice data is encapsulated into uplink voice data frames. Channel allocation refers to: according to a pre-established channel-speaker mapping relationship, each speaker is allocated one or more channels of uncompressed audio data, and the uncompressed audio data of one or more channels allocated to each speaker is superimposed (merged) to obtain the channel signal corresponding to that speaker. The channel-speaker mapping relationship, where each speaker corresponds to one or more channels, can be found in the technical solution disclosed in Chinese Patent Publication No. CN117560604A. In this preferred embodiment, the audio processor is not limited to an audio SoC (System-on-a-Chip) chip with an integrated DSP (Digital Signal Processor) core, such as Rockchip's RK2118 series audio chip, or a DSP (Digital Signal Processor) or audio processor with multi-channel audio processing capabilities. The audio processor communicates with the headphone receiving RF front-end and headphone transmitting RF front-end via an SPI (Serial Peripheral Interface) or I2S (Inter-IC Sound) interface, and connects to the driver circuit via an I2S or PCM interface. The unpacking and packaging process can refer to the unpacking and packaging scheme of the main control chip in the aforementioned wireless transceiver, and will not be repeated here.

[0060] (6) The headphone transmitting radio frequency front-end, during the uplink period of the current frame cycle, uses pulse position modulation to convert the uplink voice data frame into an uplink pulse signal and sends it to the wireless transceiver. The process of pulse position modulation can be referred to the pulse position modulation process of the aforementioned UWB transmitting radio frequency front-end, and will not be repeated here.

[0061] In this preferred embodiment, the headphone receiving RF front-end and the headphone transmitting RF front-end can also be integrated into the same UWB transceiver chip, just like the aforementioned UWB receiving RF front-end and UWB transmitting RF front-end.

[0062] This preferred embodiment obtains demodulated downlink audio data frames by receiving and demodulating downlink pulse signals during the downlink period of the current frame cycle through the headphone receiving radio frequency front end, and then decongesting and demodulating the downlink audio data frames within the same frame cycle downlink period using the audio processor. The uncompressed audio data of each channel is distributed according to the preset channel-speaker correspondence. Each channel is mapped to the corresponding channel signal for multiple speakers, which is then used by the driver circuit to drive each speaker to produce sound. Simultaneously, the microphone module collects voice data, which is then encapsulated into uplink voice data frames by the audio processor during the uplink period of the current frame cycle. These frames are then transmitted back to the wireless transceiver via the headset's RF front-end using PPM modulation. This process enables the wireless headset to complete the process with an end-to-end delay of approximately 1ms within the frame cycle constraint. Each channel ( ≥4) Real-time reception, decoding and playback of uncompressed audio data (PCM audio data), as well as synchronous transmission of uplink voice data, avoids the sound quality loss caused by insufficient bandwidth and audio-visual asynchrony caused by high latency in Bluetooth solutions. At the same time, the channel mapping of the multi-speaker acoustic structure realizes the accurate spatial sound field reproduction of 7.1 channel surround sound on headphones.

[0063] In another preferred embodiment of this example, before the driving circuit converts each channel signal into a driving electrical signal and inputs it to its corresponding speaker, the audio processor also performs: sound effect processing on the channel signals corresponding to multiple speakers. The sound effect processing includes equalizer adjustment processing, dynamic range compression processing, and spatial sound field enhancement processing on the multiple channel signals in sequence.

[0064] In this preferred embodiment, the equalizer (EQ) processing addresses the frequency response differences of each speaker by setting corresponding equalizer filter parameters to compensate for the frequency response of each channel signal, ensuring consistent timbre across all channels. Dynamic range compression (DRC) processing sets compression thresholds and corresponding compression ratios for each channel signal. When the signal amplitude exceeds the compression threshold, the signal amplitude is attenuated according to the corresponding compression ratio to prevent speaker overload distortion and improve the audibility of small signals. Spatial sound field enhancement processing is based on the principle of Head Related Transfer Functions (HRTF). According to the actual physical position of each speaker within the earcups (front, side, rear), corresponding micro-delay time differences and gain adjustments are applied to each channel signal to simulate the time and amplitude differences of sound propagating from different directions to the ear, thus reproducing a surround sound localization effect on the headphones.

[0065] This preferred embodiment adds a sound effects processing step, sequentially performing equalizer adjustment, dynamic range compression, and spatial sound field enhancement on each channel signal. These three processes are sequentially connected and optimized step-by-step, working together to enhance the sound quality of each channel signal. The uncompressed audio data of each channel is transformed into a high-quality auditory output with uniform timbre, balanced dynamics and precise spatial positioning, enhancing the immersive listening experience of multi-channel surround sound on headphones.

[0066] Example 2: This embodiment provides a wireless transceiver that can be used in the multi-channel wireless headphone system of Embodiment 1, such as... Figure 4 As shown, it includes: a wired interface controller for receiving data from the host. Uncompressed audio data for each channel, and voice data that has been converted to the correct format and sent to the host. A positive integer greater than or equal to 4; an audio decoder, communicating with the wired interface controller, and processing audio received by the wired interface controller. The system performs format parsing and buffer management on uncompressed audio data from each channel; it also performs format conversion on the voice data sent by the main control chip; and the main control chip processes the parsed audio data within the current frame period. Uncompressed audio data from each channel is encapsulated in parallel into downlink audio data frames, enabling simultaneous recording of audio data at the same time point. Uncompressed audio data from each channel is transmitted synchronously within the same frame period; the uplink voice data frame received in the current frame period is decompressed to obtain voice data, which is then sent to the audio decoder; the UWB transmitting RF front-end converts the downlink audio data frame into a downlink pulse signal using pulse position modulation during the downlink period of the frame period and sends it to the wireless headset; the UWB receiving RF front-end receives the uplink pulse signal sent by the wireless headset during the uplink period of the frame period, demodulates the uplink pulse signal to obtain the uplink voice data frame, and sends it to the main control chip; wherein, the UWB transmitting RF front-end and the UWB receiving RF front-end operate in TDD full-duplex communication mode, which sequentially sets a downlink period, an uplink period, and a guard interval in each frame period, with the downlink period being greater than the sum of the uplink period and the guard interval, and the frame period being less than 2ms.

[0067] In this embodiment, the selection, connection relationship, audio data and voice data processing procedures, and time period division of the wired interface controller, audio decoder, main control chip, UWB transmitting RF front end, and UWB receiving RF front end of the wireless transceiver can all refer to the scheme disclosed in Embodiment 1, and will not be repeated here.

[0068] Example 3: This embodiment provides a wireless earphone, which can be used in the multi-channel wireless earphone system of Embodiment 1, such as... Figure 5 As shown, it includes: a multi-speaker acoustic structure, comprising multiple speakers symmetrically arranged on speaker disks on both sides of the wireless earphone; a driving circuit, electrically connected to the multiple speakers respectively; an earphone receiving RF front-end, which receives the downlink pulse signal transmitted by the wireless transceiver during the downlink period of the current frame cycle, and demodulates the downlink pulse signal to obtain a demodulated downlink audio data frame; a microphone module, used to collect voice data of the current frame cycle; and an audio processor, which decongests and demodulates the downlink audio data frame during the downlink period of the current frame cycle to obtain... The uncompressed audio data of each channel is processed according to the preset channel-speaker correspondence. The uncompressed audio data of each channel is channel-assigned to obtain the channel signals corresponding to each speaker. The driving circuit converts each channel signal into a driving electrical signal and inputs it into the corresponding speaker. During the uplink period of the current frame cycle, the voice data is encapsulated into an uplink voice data frame. The value is a positive integer greater than or equal to 4; the headphone transmitting radio frequency front-end, during the uplink period of the current frame cycle, uses pulse position modulation to convert the uplink voice data frame into an uplink pulse signal and sends it to the wireless transceiver; wherein, the headphone receiving radio frequency front-end and the headphone transmitting radio frequency front-end operate in TDD full-duplex communication mode, the TDD full-duplex communication mode is set with a downlink period, an uplink period and a guard interval in each frame cycle, the frame cycle is less than 2ms, and the downlink period is greater than the sum of the uplink period and the guard interval.

[0069] In this embodiment, the selection, connection relationship, audio data and voice data processing process, and time period division of the frame period in the wireless earphone, including the multi-speaker acoustic structure, driving circuit, microphone module, audio processor, earphone transmitting RF front end, and earphone receiving RF front end, can all refer to the scheme disclosed in Embodiment 1, and will not be repeated here.

[0070] The above description is merely a preferred embodiment of the present invention. Those skilled in the art will understand that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the present invention. Furthermore, under the teachings of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of the present invention.

Claims

1. A multi-channel UWB wireless headphone system, characterized in that, include: The host computer, connected via wired communication with the wireless transceiver, is used to send data to the wireless transceiver. The uncompressed audio data of each channel, and the voice data uploaded by the wireless transceiver; It is a positive integer greater than or equal to 4; The wireless transceiver is used to transmit the... Each channel of uncompressed audio data is encapsulated into downlink audio data frames; The wireless earphone is wirelessly connected to the wireless transceiver via a UWB wireless communication link, and encapsulates the collected voice data into uplink voice data frames. The physical layer transmission rate supported by the UWB wireless communication link is greater than that of the above. The bit rate of uncompressed audio data for each channel, and operates in TDD full-duplex communication mode; The TDD duplex communication mode is configured with a downlink period, an uplink period, and a guard interval in each frame period. During the downlink period, the wireless transceiver sends the downlink audio data frame to the wireless headset, and during the uplink period, the wireless headset sends the uplink voice data frame to the wireless transceiver. The frame period is less than 2ms.

2. The multi-channel UWB wireless headphone system according to claim 1, characterized in that, The downlink time period is greater than the sum of the uplink time period and the protection interval.

3. The multi-channel UWB wireless headphone system according to claim 1, characterized in that, Both the wireless transceiver and the wireless earphone use pulse position modulation to transmit data frames. During the downlink period, the wireless transceiver modulates the downlink audio data frame into a downlink pulse signal and sends it to the wireless headset; During the uplink period, the wireless headset modulates the uplink voice data frame into an uplink pulse signal and sends it to the wireless transceiver.

4. The multi-channel UWB wireless headphone system according to claim 1, characterized in that, The frame period For 1ms, the Each channel is one of the eight channels in a 7.1 channel surround sound system, and the duration of the downlink time period is... The duration of the uplink period is 700 μs. The duration of the protection interval is 200 μs. The value is 100 μs.

5. A multi-channel UWB wireless headphone system according to any one of claims 1-4, characterized in that, The wireless transceiver includes: Wired interface controller, used to receive the data from the host. Uncompressed audio data for each channel, and voice data that has been format-converted and sent to the host; An audio decoder, communicatively connected to the wired interface controller, receives data from the wired interface controller. The system performs format parsing and buffer management on the uncompressed audio data of each channel; and performs format conversion on the voice data sent by the main control chip. The main control chip parses the format of the current frame period. Each channel's uncompressed audio data is encapsulated into downlink audio data frames, at the same time point Uncompressed audio data from each channel is encapsulated in the same downlink audio data frame; the uplink voice data received in the current frame period is decapsulated to obtain voice data, and the voice data is sent to the audio decoder; In the downlink period, the UWB transmitting radio frequency front-end uses pulse position modulation to convert the downlink audio data frame into a downlink pulse signal and sends it to the wireless earphone. The UWB receiving radio frequency front-end receives the uplink pulse signal sent by the wireless headset during the uplink period, demodulates the uplink pulse signal to obtain the uplink voice data frame, and sends it to the main control chip.

6. A multi-channel UWB wireless headphone system according to claim 5, characterized in that, The wired interface controller is a USB interface controller.

7. A multi-channel UWB wireless headphone system according to any one of claims 1-4 and 6, characterized in that, The wireless earphones include: The multi-speaker acoustic structure includes multiple speakers symmetrically arranged on speaker disks on both sides of the wireless earphone; The driving circuit is electrically connected to each of the plurality of speakers; The headphone receiving radio frequency front end receives the downlink pulse signal during the downlink period of the current frame cycle and demodulates the downlink pulse signal to obtain a demodulated downlink audio data frame; The microphone module is used to capture voice data for the current frame period; The audio processor, during the downlink period of the current frame cycle, decongests the demodulated downlink audio data frame to obtain... The uncompressed audio data of each channel is processed according to a preset channel-speaker correspondence. The uncompressed audio data of each channel is channel-assigned to obtain channel signals corresponding to multiple speakers. The driving circuit is used to convert each channel signal into a driving electrical signal and input it to the corresponding speaker. During the uplink period of the current frame cycle, the voice data is encapsulated into an uplink voice data frame. The headphone transmitting radio frequency front end, during the uplink period of the current frame cycle, uses pulse position modulation to convert the uplink voice data frame into the uplink pulse signal and sends it to the wireless transceiver.

8. A multi-channel UWB wireless headphone system according to claim 7, characterized in that, Before the driving circuit converts each channel signal into a driving electrical signal and inputs it to its corresponding speaker, the audio processor also performs: sound effect processing on the channel signals corresponding to multiple speakers, the sound effect processing including equalizer adjustment, dynamic range compression, and spatial sound field enhancement processing on the multiple channel signals in sequence.

9. A wireless transceiver, characterized in that, include: Wired interface controller, used to receive from the host Uncompressed audio data for each channel, and voice data that has been converted to the correct format and sent to the host. It is a positive integer greater than or equal to 4; An audio decoder, communicatively connected to the wired interface controller, receives data from the wired interface controller. The system performs format parsing and buffer management on uncompressed audio data from each channel; and performs format conversion on voice data sent by the main control chip. The main control chip parses the format of the current frame period. Each channel's uncompressed audio data is encapsulated into downlink audio data frames, and the data at the same time point... Uncompressed audio data from each channel is encapsulated in the same downlink audio data frame; the uplink voice data received in the current frame period is decapsulated to obtain voice data, and the voice data is sent to the audio decoder; The UWB transmitting radio frequency front-end uses pulse position modulation to convert the downlink audio data frame into a downlink pulse signal and send it to the wireless headset during the downlink period of the frame cycle. The UWB receiving radio frequency front end receives the uplink pulse signal sent by the wireless headset during the uplink period of the frame cycle, demodulates the uplink pulse signal to obtain the uplink voice data frame and sends it to the main control chip. The UWB transmitting radio frequency front-end and the UWB receiving radio frequency front-end operate in TDD full-duplex communication mode. The TDD full-duplex communication mode is configured with the downlink period, the uplink period and the guard interval in each frame period. The downlink period is greater than the sum of the uplink period and the guard interval, and the frame period is less than 2ms.

10. A wireless earphone, characterized in that, include: The multi-speaker acoustic structure includes multiple speakers symmetrically arranged on speaker disks on both sides of the wireless earphone; The driving circuit is electrically connected to each of the plurality of speakers; The headphone receiving radio frequency front end receives the downlink pulse signal sent by the wireless transceiver during the downlink period of the current frame cycle, and demodulates the downlink pulse signal to obtain a demodulated downlink audio data frame. The microphone module is used to capture voice data for the current frame period; The audio processor, during the downlink phase of the current frame period, decongests the demodulated downlink audio data frame to obtain... The uncompressed audio data of each channel is processed according to a preset channel-speaker correspondence. The uncompressed audio data of each channel is channel-assigned to obtain channel signals corresponding to multiple speakers. The driving circuit is used to convert each channel signal into a driving electrical signal and input it to the corresponding speaker. During the uplink period of the current frame cycle, the voice data is encapsulated into an uplink voice data frame. It is a positive integer greater than or equal to 4; The headphone transmitting radio frequency front end, during the uplink period of the current frame cycle, uses pulse position modulation to convert the uplink voice data frame into an uplink pulse signal and sends it to the wireless transceiver; The earphone receiving radio frequency front-end and the earphone transmitting radio frequency front-end operate in TDD full-duplex communication mode. The TDD full-duplex communication mode is configured with the downlink period, the uplink period and the guard interval in each frame period. The frame period is less than 2ms and the downlink period is greater than the sum of the uplink period and the guard interval.

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