A transmission system, method and wireless earphone of audio data

Abstract

The application provides a transmission system and method of audio data and a wireless earphone. The main earphone and the auxiliary earphone are wirelessly connected with a USB Dongle terminal through a BLE audio CIS protocol, so that the USB Dongle terminal can receive data at the same time, the data delay is avoided, the bandwidth pressure of the earphone is reduced, and the anti-interference capability of the wireless earphone is improved. The noise reduction processing is transferred from the wireless earphone to the USB Dongle terminal, so that the system power consumption required by the main earphone is effectively reduced, and the standby time of the main earphone is prolonged. The USB Dongle terminal directly sends the data after noise reduction to the wireless earphone or an electronic device, so that an additional coding and decoding process is avoided, and the distortion degree of the audio data is reduced. The USB Dongle terminal is wirelessly connected with the electronic device through a USB audio protocol, working power is obtained from the electronic device, and the use time of the system is prolonged.

Description

Technical Field

[0001] This invention relates to the field of audio transmission technology, and in particular to an audio data transmission system, method, and wireless headphones. Background Technology

[0002] Please see Figure 1 In existing technology, both the main and secondary earbuds of a wireless headset are equipped with Bluetooth chips, and the two establish a connection via Bluetooth. At the same time, the main earbud also establishes a Bluetooth connection with the mobile phone. During operation, the secondary earbud collects microphone data, compresses it locally, and sends the compressed microphone data to the main earbud through the Bluetooth connection between the earbuds. The main earbud decompresses the received compressed data from the secondary earbud, performs multi-microphone noise reduction processing on the decompressed microphone data from the secondary earbud and the microphone data it has collected, and then compresses the original microphone data after noise reduction processing and sends it to the mobile phone.

[0003] The above solution has the following problems:

[0004] 1. While the main earphone interacts with the mobile phone, it also needs to receive data sent from the secondary earphone, which consumes more Bluetooth bandwidth and weakens the anti-interference ability of the main earphone.

[0005] 2. It takes a certain amount of time for the microphone data collected from the secondary earphone to be sent to the primary earphone, which causes the primary earphone to need to add a delay to the microphone data it collects in order to achieve synchronization of the microphone data from both ears, resulting in an increase in the delay of the uplink microphone data;

[0006] 3. The main earphone performs noise reduction processing on the microphone data, which requires a higher system frequency, resulting in increased power consumption of the main earphone and shortened standby time;

[0007] 4. Due to bandwidth limitations, the main earphone needs to compress the microphone data after noise reduction before sending it to the mobile phone, and then the mobile phone decodes it. The additional encoding and decoding increases the distortion of the audio signal. Summary of the Invention

[0008] In view of the shortcomings of the prior art described above, the purpose of this invention is to provide an audio data transmission system, method, and wireless earphone to solve the problems in the prior art where the main earphone receives microphone data from the secondary earphone, performs noise reduction processing on the microphone data, and then transmits it to the mobile phone, resulting in weakened anti-interference capability of the main earphone, increased uplink microphone data delay, shortened standby time, and increased audio signal distortion.

[0009] A first aspect of the present invention provides an audio data transmission system, including a wireless headset, a USB dongle terminal, and an electronic device;

[0010] The main and secondary earpieces of the wireless headset are wirelessly connected to the USB Dongle terminal via the BLE audio CIS protocol.

[0011] The USB dongle terminal is wired to the electronic device via the USB audio protocol;

[0012] The wireless earphone is used to collect sound signals and play the received playback signals.

[0013] The USB Dongle terminal is used to perform noise reduction processing on the sound signal to obtain a collected signal; it is also used to perform noise reduction processing on the audio signal to obtain a playback signal.

[0014] The electronic device is used to process the acquired signals and provide audio signals.

[0015] In one embodiment of the present invention, the sound signal includes a noise signal;

[0016] The USB Dongle terminal is used to generate a correction signal based on the noise signal, and to perform noise reduction processing on the sound signal based on the correction signal to generate a sampling signal; it is also used to perform noise reduction processing on the audio signal based on the correction signal to generate a playback signal.

[0017] In one embodiment of the present invention, the wireless earphone is further configured to encode the sound signal and decode the encoded playback signal before playback.

[0018] The USB Dongle terminal is also used to decode the encoded audio signal before noise reduction and to encode the playback signal.

[0019] In one embodiment of the present invention, the USB Dongle terminal includes:

[0020] The first communication unit is wirelessly connected to the main earphone and the secondary earphone respectively via the BLE audio CIS protocol, and is used to receive the sound signals sent by the main earphone and the secondary earphone;

[0021] The second communication unit is wired to the electronic device via the USB audio protocol, and is used to receive the audio signal and to power the USB Dongle terminal.

[0022] A first processor is configured to generate a correction signal based on the noise signal, and to perform noise reduction processing on the sound signal based on the correction signal to generate a sampling signal; it is also configured to perform noise reduction processing on the audio signal based on the correction signal to generate a playback signal.

[0023] The first communication unit is further configured to send the playback signal to the main earphone and the secondary earphone;

[0024] The second communication unit is also used to send the acquired signal to the electronic device.

[0025] In one embodiment of the present invention, the USB Dongle terminal further includes:

[0026] A first decoder is used to decode the sound signal before noise reduction processing; wherein the sound signal is encoded in the main earphone and the secondary earphone.

[0027] A first encoder is used to encode the playback signal before transmission.

[0028] In one embodiment of the present invention, the electronic device includes:

[0029] The third communication unit is wired to the USB Dongle terminal via the USB audio protocol, and is used to receive the acquired signal and also to send the audio signal;

[0030] The second processor is used to process the acquired signal and provide the audio signal.

[0031] A second aspect of the present invention also provides a method for transmitting audio data, comprising:

[0032] The main and secondary earpieces of the wireless headset collect sound signals independently and transmit the sound signals to the USB Dongle terminal via the BLE audio CIS protocol.

[0033] The USB Dongle terminal performs noise reduction processing on the audio signal and sends the noise-reduced audio signal to the electronic device for processing via the USB audio protocol.

[0034] In one embodiment of the present invention, the electronic device provides an audio signal and transmits the audio signal to the USB Dongle terminal via the USB audio protocol;

[0035] The USB Dongle terminal performs noise reduction processing on the audio signal and sends the noise-reduced audio signal to the main and secondary earpieces of the wireless headset via the BLE audio CIS protocol;

[0036] The main earphone and the secondary earphone convert the audio signal into audio and play it.

[0037] A third aspect of the present invention also provides a wireless earphone, comprising: a main earphone and a secondary earphone;

[0038] Both the main earphone and the secondary earphone include:

[0039] At least one microphone is used to collect sound signals;

[0040] The first communication unit is wirelessly connected to the USB Dongle terminal via the BLE audio CIS protocol. It is used to send the sound signal and also to receive the playback signal, which is an audio signal that has been noise-reduced by the USB Dongle terminal.

[0041] The earpiece is used to convert the playback signal into audio and play it.

[0042] In one embodiment of the present invention, it further includes:

[0043] The second encoder is used to encode the sound signals collected by each of the microphones before transmission;

[0044] A second decoder is used to decode the playback signal before playback, wherein the playback signal is encoded at the USB Dongle terminal.

[0045] As described above, the audio data transmission system, method, and wireless headphones of the present invention have the following beneficial effects:

[0046] 1. The main and secondary earpieces of the wireless earphone of this invention are wirelessly connected to the USB Dongle terminal via the BLE audio CIS protocol, which can ensure that the data transmission between the two earpieces and the USB Dongle terminal can be carried out simultaneously, avoiding data delay, reducing the bandwidth pressure on the two earpieces, and improving the anti-interference capability of the wireless earphone.

[0047] 2. This invention transfers noise reduction processing from the wireless earphone end to the USB Dongle terminal, effectively reducing the system power consumption required by the main earphone and extending the standby time of the main earphone;

[0048] 3. The USB Dongle terminal of the present invention directly sends the noise-reduced data to wireless headphones or electronic devices, avoiding additional encoding and decoding processes and reducing the distortion of audio data;

[0049] 4. The USB Dongle terminal connects to electronic devices via the USB audio protocol and can obtain power from the electronic devices, extending the usage time of the transmission system. Attached Figure Description

[0050] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0051] Figure 1 The diagram shown illustrates the connection between a wireless headset and a mobile phone in the prior art of this invention.

[0052] Figure 2 The diagram shown is a structural block diagram of the transmission system according to the first embodiment of the present invention.

[0053] Figure 3 The diagram shown is a structural block diagram of the main earphone in the first embodiment of the present invention.

[0054] Figure 4 The diagram shown is a structural block diagram of a USB Dongle terminal according to the first embodiment of the present invention.

[0055] Figure 5 The diagram shown is a structural block diagram of an electronic device according to the first embodiment of the present invention.

[0056] Figure 6 The flowchart shown is a transmission method according to the second embodiment of the present invention.

[0057] Figure 7 This is another flowchart illustrating the transmission method in the second embodiment of the present invention. Detailed Implementation

[0058] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0059] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the figures only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0060] Please see Figure 2The first embodiment of the present invention relates to an audio data transmission system, including: a wireless headset, a USB dongle terminal, and an electronic device.

[0061] The wireless headset includes a main earpiece and a secondary earpiece, which can independently connect wirelessly to the USB Dongle terminal via the BLE audio CIS protocol and exchange data. Furthermore, the USB Dongle terminal can also connect to electronic devices via the USB audio protocol.

[0062] It should be understood that the point-to-multipoint connected isochronous stream (CIS) audio protocol, with Bluetooth LE synchronization channel functionality, is a new method for transmitting data between devices using Bluetooth LE. It provides an algorithmic mechanism to ensure that multiple receiver devices can synchronously receive data from the master device. Its protocol stipulates that each frame of data sent by the Bluetooth transmitter has a time limit. Data received by the slave device after the time window will be discarded. This means that the receiver device only receives data within the valid time window, thereby ensuring the synchronization of data reception by multiple slave devices.

[0063] The main and secondary earpieces are used to independently acquire audio signals and transmit them to the USB Dongle terminal via the BLE audio CIS protocol. This approach leverages the characteristics of the BLE audio CIS protocol to ensure the USB Dongle terminal can simultaneously receive audio signals from both the main and secondary earpieces, avoiding data latency, reducing subsequent processing complexity, and improving the user experience. Simultaneously, the secondary earpiece's direct communication connection to the USB Dongle terminal effectively reduces the bandwidth load on the main earpiece and enhances its anti-interference capabilities.

[0064] The USB dongle terminal is used to perform noise reduction processing on the audio signals sent by the main and secondary earphones, and to send the noise-reduced audio signals to electronic devices via the USB audio protocol.

[0065] Electronic devices used to process noise-reduced audio signals.

[0066] In one feasible embodiment, the electronic device is further configured to provide an audio signal and transmit the audio signal to a USB Dongle terminal via the USB audio protocol. It should be understood that the audio signal may be a song from a music playback platform installed on the electronic device, an audio signal pre-stored in the electronic device, or even an audio signal recorded live by the electronic device.

[0067] The USB Dongle terminal is also used for noise reduction of audio signals and sends the noise-reduced audio signals to the main and secondary earphones via the BLE audio CIS protocol.

[0068] The main and secondary earphones are also used to play noise-canceling audio signals.

[0069] To further explain, the sound signals collected by the main and secondary earphones include not only the signals required by the user but also ambient noise signals. The USB Dongle terminal analyzes the noise signals and generates an inverse sound wave equal to the external noise, neutralizing the external noise and thus achieving noise reduction. It should be understood that this noise signal is transmitted to the USB Dongle terminal in real time. Specifically, in this embodiment, the USB Dongle terminal generates a correction signal based on the noise signal and performs noise reduction processing on the sound signal based on the correction signal to generate the collected signal. Correspondingly, when the USB Dongle terminal receives an audio signal provided by an electronic device, it can also perform noise reduction processing on the audio signal based on the correction signal to generate a playback signal for the wireless earphones to play. By shifting the noise reduction processing from the main earphone to the USB Dongle terminal, this effectively reduces the system power consumption required by the main earphone and extends its standby time.

[0070] It should be understood that the electronic device in this embodiment can be a common terminal such as a mobile phone, tablet computer, desktop computer or laptop computer in the prior art.

[0071] To further explain, the main and secondary earphones are also used to encode the collected audio signals, and then send the encoded audio signals to the USB Dongle terminal via the BLE audio CIS protocol.

[0072] The USB dongle terminal is also used to decode the encoded audio signal, perform noise reduction, obtain the acquired signal, and send the acquired signal to the electronic device via the USB audio protocol. Using this approach, the USB dongle terminal does not need to consider bandwidth limitations during data transmission, does not need to compress the noise-reduced data again, avoids additional encoding and decoding processes, and effectively reduces audio data distortion.

[0073] In one feasible embodiment, the USB Dongle terminal is also used to encode the playback signal and then send the playback signal to the main and secondary earphones via the BLE audio CIS protocol.

[0074] The main and secondary earphones are also used to decode the encoded playback signal before playing the decoded signal.

[0075] Please see Figure 3 Specifically, both the main and secondary earphones include:

[0076] At least one microphone is used to collect sound signals.

[0077] The second encoder is used to encode the sound signals collected by each microphone.

[0078] The fourth communication unit wirelessly connects to the USB Dongle terminal via the BLE audio CIS protocol and is used to send all encoded audio signals to the USB Dongle terminal.

[0079] In one feasible embodiment, the fourth communication unit is also configured to receive encoded playback signals sent by the USBDongle terminal via the BLE audio CIS protocol.

[0080] The second decoder is used to decode the encoded playback signal;

[0081] The earpiece is used to convert the decoded playback signal into audio and play it. It should be understood that the earpiece can also amplify the audio before playing it.

[0082] Please see Figure 4 The USB Dongle terminal includes:

[0083] The first communication unit is wirelessly connected to the fourth communication unit of the main and secondary earphones via the BLE audio CIS protocol, and is used to receive the encoded audio signals sent by the main and secondary earphones.

[0084] The first decoder is used to decode all the encoded audio signals.

[0085] The first processor is used to generate a correction signal based on the decoded noise signal, and to perform noise reduction processing on the audio signal based on the correction signal to generate the acquisition signal.

[0086] The second communication unit is wired to the electronic device via the USB audio protocol and is used to send the acquired signals to the electronic device. At the same time, the second communication unit also obtains operating power from the electronic device to power the USB Dongle terminal.

[0087] In one feasible embodiment, the second communication unit is also configured to receive audio signals sent by an electronic device via the USB audio protocol.

[0088] The first processor is also used to generate a correction signal based on the decoded noise signal, and to perform noise reduction processing on the audio signal based on the correction signal to generate a playback signal.

[0089] The first encoder is used to encode the playback signal.

[0090] The first communication unit is also used to send the encoded playback signal to the main earphone and the secondary earphone via the BLE audio CIS protocol.

[0091] Please see Figure 5 Electronic devices include:

[0092] The third communication unit is wired to the second communication unit of the USB Dongle terminal via the USB audio protocol, and is used to receive the acquired signal via the USB audio protocol.

[0093] The second processor is used to process the acquired signals. It should be understood that users can process the acquired signals as needed, such as converting them into text signals for display or broadcast on the screen of an electronic device; or inputting the acquired signals into audio editing software to create the desired sound effects.

[0094] Meanwhile, the second processor is also used to provide audio signals.

[0095] The third communication unit is also used to send audio signals via the USB audio protocol.

[0096] It should be understood that the electronic device also includes a power supply unit, which powers the USB Dongle terminal via the third communication unit. Simultaneously, the power supply unit also powers the electronic device. Using this scheme, the USB Dongle terminal can sequentially obtain operating power from the electronic device through the second and third communication units, extending the usage time of the transmission system.

[0097] Please see Figure 6 The second embodiment of the present invention relates to a method for transmitting audio data, comprising:

[0098] Step 601: The main and secondary earpieces of the wireless headset collect sound signals separately and send the sound signals to the USB Dongle terminal via the BLE audioCIS protocol.

[0099] Specifically, the wireless headset includes a main earphone and a secondary earphone. The main earphone and the secondary earphone can be wirelessly connected to the USB Dongle terminal independently via the BLE audioCIS protocol and exchange data.

[0100] It should be understood that the point-to-multipoint connected isochronous stream (CIS) audio protocol, with Bluetooth LE synchronization channel functionality, is a new method for transmitting data between devices using Bluetooth LE. It provides an algorithmic mechanism to ensure that multiple receiver devices can synchronously receive data from the master device. Its protocol stipulates that each frame of data sent by the Bluetooth transmitter has a time limit. Data received by the slave device after the time window will be discarded. This means that the receiver device only receives data within the valid time window, thereby ensuring the synchronization of data reception by multiple slave devices.

[0101] The main and secondary earpieces are used to independently acquire audio signals and transmit them to the USB Dongle terminal via the BLE audio CIS protocol. This approach leverages the characteristics of the BLE audio CIS protocol to ensure the USB Dongle terminal can simultaneously receive audio signals from both the main and secondary earpieces, avoiding data latency, reducing subsequent processing complexity, and improving the user experience. Simultaneously, the secondary earpiece's direct communication connection to the USB Dongle terminal effectively reduces the bandwidth load on the main earpiece and enhances its anti-interference capabilities.

[0102] To further explain, the main and secondary earphones are also used to encode the collected audio signals, and then send the encoded audio signals to the USB Dongle terminal via the BLE audio CIS protocol.

[0103] Step 602: The USB Dongle terminal performs noise reduction processing on the audio signal and sends the noise-reduced audio signal to the electronic device via the USB audio protocol.

[0104] Specifically, the USB Dongle terminal also connects to the electronic device via a wired connection using the USB audio protocol. Both the main and secondary earphones collect audio signals that include noise signals. The USB Dongle terminal analyzes the noise signals and generates an inverse sound wave equal to the external noise, neutralizing it and achieving noise reduction. In this embodiment, the USB Dongle terminal generates a correction signal based on the noise signal and then performs noise reduction processing on the audio signal based on the correction signal to generate the collected signal. This approach shifts the noise reduction processing from the main earphone to the USB Dongle terminal, effectively reducing the system power consumption required by the main earphone and extending its standby time.

[0105] To further explain, the USB Dongle terminal first decodes the encoded audio signals sent by the main and secondary earphones, then performs noise reduction on the decoded audio signals to obtain the acquired signal, and then sends the acquired signal to the electronic device via the USB audio protocol.

[0106] Step 603: The electronic device processes the noise-reduced audio signal.

[0107] Specifically, the noise-reduced sound signal is the acquisition signal. After receiving the acquisition signal, the electronic device can process it as needed, such as converting the acquisition signal into a text signal for display or broadcast on the screen of the electronic device; or inputting the acquisition signal into audio editing software to create the required sound effects.

[0108] Please see Figure 7 The second embodiment of the audio data transmission method of the present invention further includes:

[0109] Step 701: The electronic device provides an audio signal and sends the audio signal to the USBDongle terminal via the USB audio protocol.

[0110] Specifically, the audio signal can be a song from a music playback platform installed on the electronic device, an audio signal pre-stored in the electronic device, or even an audio signal recorded live by the electronic device. The electronic device sends this audio signal to the USB dongle terminal via the USB audio protocol.

[0111] Step 702: The USB Dongle terminal performs noise reduction processing on the audio signal and sends the noise-reduced audio signal to the wireless headphones via the BLE audio CIS protocol.

[0112] Specifically, the USB Dongle terminal generates a correction signal based on the noise signal, performs noise reduction processing on the audio signal based on the correction signal, generates a playback signal, and sends the playback signal to the main and secondary earpieces of the wireless headset via the BLE audio CIS protocol.

[0113] To further explain, the USB Dongle terminal first encodes the playback signal, and then sends the encoded playback signal to the main and secondary earpieces of the wireless headset via the BLE audio CIS protocol.

[0114] Step 703: The wireless headphones convert the noise-reduced audio signal into audio and play it.

[0115] Specifically, the noise-reduced audio signal is the playback signal. After receiving the playback signal, the main and secondary earphones convert it into audio, amplify it, and play it.

[0116] To further explain, after receiving the encoded playback signal, the main and secondary earphones first decode the playback signal, then convert the decoded playback signal into audio, amplify it, and play it.

[0117] A third embodiment of the present invention relates to a wireless earphone, comprising: a main earphone and a secondary earphone.

[0118] The main and secondary earphones are wirelessly connected to the USB Dongle terminal via the BLE audio CIS protocol.

[0119] Please see Figure 3 Both the main and secondary earphones include:

[0120] At least one microphone is used to collect sound signals. It should be understood that the sound signals collected by the microphone include not only the signals required by the user, but also ambient noise signals, which can be used for subsequent noise reduction processing.

[0121] The first encoder is used to encode the sound signals collected by each microphone.

[0122] The first communication unit is used to send the encoded audio signal to the USBDongle terminal via the BLE audio CIS protocol.

[0123] Meanwhile, the first communication unit is also used to receive audio signals from electronic devices via the BLE audio CIS protocol.

[0124] The first decoder is used to decode the noise-reduced audio signals originating from electronic devices.

[0125] The earpiece is used to convert the decoded audio signal into audio, amplify it, and play it back.

[0126] It should be understood that the main earphone and the secondary earphone in this embodiment also include:

[0127] The memory stores the application code, the Bluetooth address that uniquely identifies one headset, the Bluetooth address of another wireless headset, and the pairing history of USB dongle terminals and electronic devices that have been successfully paired with the headset before.

[0128] The third processor is used to execute application code.

[0129] The sensor, which is a distance sensor or proximity light sensor, is used to detect whether the wireless earphones are being worn by the user.

[0130] The power source, a rechargeable battery, is used to provide power to the earphones. In one feasible embodiment, the wireless earphones also have an earphone case with a charging port for charging the wireless earphones.

[0131] In summary, the audio data transmission system, method, and wireless headphones of the present invention have the following beneficial effects:

[0132] 1. The main and secondary earpieces of the wireless earphone of this invention are wirelessly connected to the USB Dongle terminal via the BLE audio CIS protocol, which ensures that data transmission between the two earpieces and the USB Dongle terminal can be carried out simultaneously, avoiding data delay, reducing the bandwidth pressure on the two earpieces, and improving the anti-interference capability of the wireless earphone.

[0133] 2. This invention transfers noise reduction processing from the wireless earphone end to the USB Dongle terminal, effectively reducing the system power consumption required by the main earphone and extending the standby time of the main earphone;

[0134] 3. The USB Dongle terminal of the present invention directly sends the noise-reduced data to wireless headphones or electronic devices, avoiding additional encoding and decoding processes and reducing the distortion of audio data;

[0135] 4. The USB Dongle terminal connects to electronic devices via the USB audio protocol and can obtain power from the electronic devices, extending the usage time of the transmission system.

[0136] Therefore, this invention effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0137] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. An audio data transmission system, characterized in that, include: Wireless headphones, USB dongle terminals and electronic devices; The main and secondary earpieces of the wireless headset are wirelessly connected to the USB Dongle terminal via the BLE audio CIS protocol; data transmission between the main and secondary earpieces and the USB Dongle terminal occurs simultaneously. The USB dongle terminal is wired to the electronic device via the USB audio protocol; The wireless earphone is used to collect sound signals and play the received playback signals. The USB Dongle terminal is used to perform noise reduction processing on the sound signal to obtain a collected signal; it is also used to perform noise reduction processing on the audio signal to obtain a playback signal. The electronic device is used to process the acquired signal and provide the audio signal; The sound signal includes a noise signal; The USB Dongle terminal is used to generate a correction signal based on the noise signal, and to perform noise reduction processing on the sound signal based on the correction signal to generate a sampling signal; it is also used to perform noise reduction processing on the audio signal based on the correction signal to generate a playback signal.

2. The transmission system according to claim 1, characterized in that: The wireless earphone is also used to encode the sound signal and decode the encoded playback signal before playback. The USB Dongle terminal is also used to decode the encoded audio signal before noise reduction and to encode the playback signal.

3. The transmission system according to claim 2, characterized in that, The USB Dongle terminal includes: The first communication unit is wirelessly connected to the main earphone and the secondary earphone respectively via the BLE audio CIS protocol, and is used to receive the sound signals sent by the main earphone and the secondary earphone; The second communication unit is wired to the electronic device via the USB audio protocol, and is used to receive the audio signal and to power the USB Dongle terminal. A first processor is configured to generate a correction signal based on the noise signal, and to perform noise reduction processing on the sound signal based on the correction signal to generate a sampling signal; it is also configured to perform noise reduction processing on the audio signal based on the correction signal to generate a playback signal. The first communication unit is further configured to send the playback signal to the main earphone and the secondary earphone; The second communication unit is also used to send the acquired signal to the electronic device.

4. The transmission system according to claim 3, characterized in that, The USB Dongle terminal also includes: A first decoder is used to decode the sound signal before noise reduction processing; wherein the sound signal is encoded in the main earphone and the secondary earphone. A first encoder is used to encode the playback signal before transmission.

5. The transmission system according to claim 1, characterized in that, The electronic device includes: The third communication unit is wired to the USB Dongle terminal via the USB audio protocol, and is used to receive the acquired signal and also to send the audio signal; The second processor is used to process the acquired signal and provide the audio signal.

6. A method for transmitting audio data, characterized in that, The transmission method, applied to the audio data transmission system according to any one of claims 1-5, comprises: The main and secondary earpieces of the wireless headset independently collect sound signals and transmit them to the USB Dongle terminal via the BLE audio CIS protocol; data transmission between the main and secondary earpieces and the USB Dongle terminal occurs simultaneously. The USB Dongle terminal performs noise reduction processing on the audio signal and sends the noise-reduced audio signal to the electronic device for processing via the USB audio protocol. The USB Dongle terminal is also wired to the electronic device via the USB audio protocol.

7. The transmission method according to claim 6, characterized in that, Also includes: The electronic device provides an audio signal and transmits the audio signal to the USBDongle terminal via the USB audio protocol; The USB Dongle terminal performs noise reduction processing on the audio signal to obtain a playback signal, and sends the playback signal to the main and secondary earpieces of the wireless headphones via the BLE audioCIS protocol; The main earphone and the secondary earphone convert the playback signal into audio and play it.

8. A wireless earphone, characterized in that, The wireless earphone, used in the audio data transmission system according to any one of claims 1-5, comprises: a main earphone and a secondary earphone; Both the main earphone and the secondary earphone include: At least one microphone is used to collect sound signals; The fourth communication unit is wirelessly connected to the USB Dongle terminal via the BLE audio CIS protocol. It is used to send the sound signal and receive the playback signal, which is an audio signal that has been noise-reduced by the USB Dongle terminal. The data transmission between the main earphone and the secondary earphone and the USB Dongle terminal is carried out simultaneously. The earpiece is used to convert the playback signal into audio and play it.

9. The wireless earphone according to claim 8, characterized in that, Also includes: The second encoder is used to encode the sound signals collected by each of the microphones before transmission; The second decoder is used to decode the playback signal before playback, wherein the playback signal is encoded in the USB Dongle terminal.

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