Wireless headset and audio sharing method

Abstract

The present invention provides a wireless headset and an audio sharing method, wherein the wireless headset comprises at least a first headset and a second headset. The first headset comprises a first classic Bluetooth communication module, a first conversion codec and a first LE Audio communication module, and the second headset comprises a second classic Bluetooth communication module, a second conversion codec and a second LE Audio communication module. Among them, at least one of the first LE Audio communication module and the second LE Audio communication module is configured to obtain the second audio data, and transmit the second audio data to another pair of earphones supporting the LE Audio mode in the surrounding area via LE Audio for audio sharing. In this way, it can be used in conjunction with a smart device that only supports classic Bluetooth, allowing users to enjoy the music sharing function using the LE Audio mode conveniently and at low cost.

Description

Technical Field

[0001] The present invention relates to a wireless headset and a wireless communication method for the wireless headset, and more particularly to a wireless headset and an audio sharing method. Background Art

[0002] Today's social life has put forward the demand for social sharing of audio playback. For example, people may expect to be able to easily share their music with one or more other groups of users. LE Audio is a new wireless communication mode, and its unique LE Audio broadcast function enables the provision of an audio sharing experience. Although people have tried to use LE Audio broadcasting to perform audio sharing functions, this function usually relies on portable smart devices that support LE Audio technology (such as but not limited to mobile phones). However, because LE Audio technology has just begun to be promoted, the Bluetooth protocol of the Bluetooth communication mode of most mobile phones on the market usually supports classic Bluetooth technology, and only supports Core Spec5.2 at most. Few support LE Audio technology. It is too costly to replace the mobile phone just to add the audio sharing function, which hinders the promotion and application of the audio sharing function.

[0003] For users, the current audio sharing function is usually one-way sharing from the portable smart device held by the user to the wireless audio playback component held by the user, such as a wireless paired headset, or one-way sharing from the portable smart device of another user to the portable smart device of the user. Ensuring that the portable smart device supports LE Audio technology is costly and not conducive to promotion. Furthermore, the restricted sharing direction is not only costly, but also limits the application scenarios of music sharing, reduces the reliability of music sharing (because it relies heavily on portable smart devices as broadcast providers), and there is still room for further improvement in user experience. Summary of the invention

[0004] The present invention is provided to solve the above-mentioned problems existing in the prior art. The present invention provides a wireless headset and an audio sharing method, which can be used by a user directly in conjunction with an existing smart device that only supports classic Bluetooth technology, so that the user can conveniently and inexpensively use the LE Audio mode to enjoy the music sharing function, and can enable the wireless headset to better receive audio data from the smart device that only supports classic Bluetooth technology, and is suitable for application scenarios of music sharing between different wireless headsets (for example, between different users' paired wireless headsets), thereby improving the user's music listening experience.

[0005] According to a first aspect of the present invention, a wireless headset is provided, the wireless headset comprising at least a first headset and a second headset. The first headset comprises a first classic Bluetooth communication module, a first conversion codec and a first LE Audio communication module; the second headset comprises a second classic Bluetooth communication module, a second conversion codec and a second LE Audio communication module. The first classic Bluetooth communication module is configured to receive first audio data from the smart device via a classic Bluetooth connection of a smart device supporting the classic Bluetooth mode but not the LE Audio mode, and transmit the communication-related parameters of the classic Bluetooth connection to the second classic Bluetooth communication module. The second classic Bluetooth communication module is configured to listen to the classic Bluetooth connection and receive the first audio data based on the communication-related parameters of the received classic Bluetooth connection. At least one of the first conversion codec and the second conversion codec is configured to decode the first audio data received by the first headset and the second headset respectively and encode it in an applicable encoding mode of the LE Audio mode to obtain the second audio data. At least one of the first LE Audio communication module and the second LE Audio communication module is configured to obtain the second audio data; and transmit the second audio data to another pair of earphones supporting the LE Audio mode in the surrounding area via LE Audio so as to share the audio.

[0006] According to a second aspect of the present invention, a method for sharing audio of a wireless headset is provided, wherein the wireless headset comprises at least a first headset and a second headset, wherein both the first headset and the second headset support the LE Audio mode, and the method for sharing audio comprises the first headset receiving first audio data from the smart device via a classic Bluetooth connection of the smart device supporting the classic Bluetooth mode but not the LE Audio mode. The second headset acquires the first audio data from the smart device by intercepting, the first headset and the second headset decode the first audio data received by each and encode it in an applicable encoding method of the LE Audio mode to obtain second audio data, and the first headset and the second headset transmit the second audio data to another pair of earphones supporting the LE Audio mode in the surrounding area via LE Audio for audio sharing.

[0007] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0008] By using the wireless headphones according to the various embodiments of the present invention, users can directly use them in conjunction with existing smart devices that only support classic Bluetooth technology, so that users can conveniently and cost-effectively enjoy the music sharing function using the LE Audio mode. The wireless audio playback component can better receive audio data from smart devices that only support classic Bluetooth technology, and is suitable for application scenarios of music sharing between different wireless headphones, thereby improving the user's music listening experience.

[0009] The foregoing general description and the following detailed description are exemplary and explanatory only and are not intended to restrict the invention, as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In the drawings, which are not necessarily drawn to scale, the same reference numerals may describe similar parts in different views. Similar reference numerals with letter suffixes or different letter suffixes may represent different examples of similar components. The accompanying drawings generally illustrate various embodiments by way of example and not by way of limitation, and together with the description and claims, are used to illustrate the disclosed embodiments. Such embodiments are illustrative and exemplary and are not intended to be exhaustive or exclusive embodiments of the present method, apparatus, system, or non-transitory computer-readable medium having instructions for implementing the method.

[0011] Figure 1 A schematic diagram showing a wireless headset according to an embodiment of the present invention;

[0012] Figure 2 A schematic diagram showing audio sharing between a first earphone, a second earphone and another pair of earphones according to an embodiment of the present invention;

[0013] FIG3( a ) shows a schematic diagram of another pair of earphones according to an embodiment of the present invention;

[0014] FIG3( b ) is a schematic diagram showing a first earphone sending a PDU to another pair of earphones according to an embodiment of the present invention;

[0015] FIG3( c ) shows another schematic diagram of a first earphone sending a PDU to another pair of earphones according to an embodiment of the present invention;

[0016] FIG4( a ) is a schematic diagram showing a wireless headset sharing audio data with another pair of earphones according to an embodiment of the present invention;

[0017] FIG4( b ) is a schematic diagram showing a switching between a first earphone and a second earphone when a wireless earphone shares audio data with another pair of earphones according to an embodiment of the present invention;

[0018] FIG5( a ) shows another schematic diagram of switching between a first earphone and a second earphone when a wireless earphone shares audio data with another pair of earphones according to an embodiment of the present invention;

[0019] FIG5( b ) is a schematic diagram showing a switching between a first earphone and a second earphone when a wireless earphone shares audio data with another pair of earphones according to an embodiment of the present invention;

[0020] Figure 6 A timing diagram showing communication between a wireless headset and a smart device according to an embodiment of the present invention;

[0021] Figure 7 Another timing diagram showing the communication between the wireless headset and the smart device according to an embodiment of the present invention;

[0022] Figure 8 A flow chart showing audio sharing between a wireless headset and another pair of earphones according to an embodiment of the present invention. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is described in detail in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are further described in detail in conjunction with the accompanying drawings and specific embodiments, but are not intended to limit the present invention. The terms "first", "second", "third" and "fourth" used in the present invention are only intended to distinguish the corresponding features, and do not mean that such an order is required, nor do they necessarily represent only the singular form, do not represent the quantity or importance, but are only used to distinguish the titles of parts. The terms "first earphone", "second earphone", "third earphone" and "fourth earphone" used in the present invention are only used to distinguish. For example, in other embodiments, the "first earphone" may be the "second earphone", "third earphone" or "fourth earphone", and the "second earphone" may be the "first earphone", "third earphone" or "fourth earphone", etc. "Include" or "comprising" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of also including other elements. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0024] In the present invention, the arrows shown in the figures of each step are only examples of the execution order, not limitations. The technical solution of the present invention is not limited to the execution order described in the embodiments. The various steps in the execution order can be combined for execution, can be decomposed for execution, and the order can be changed as long as it does not affect the logical relationship of the execution content.

[0025] All terms (including technical terms or scientific terms) used in the present invention have the same meaning as those understood by ordinary technicians in the field to which the present invention belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined herein. Technologies, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but where appropriate, the technologies, methods and equipment should be considered as part of the specification.

[0026] Figure 1 A schematic diagram of a wireless headset according to an embodiment of the present invention is shown. The wireless headset includes at least a first headset 101 and a second headset 102. The first headset 101 includes a first classic Bluetooth communication module 101a, a first conversion codec 101b and a first LE Audio communication module 101c, and the second headset 102 includes a second classic Bluetooth communication module 102a, a second conversion codec 102b and a second LE Audio communication module 102c. Specifically, the first classic Bluetooth communication module 101a may have a corresponding codec (not shown), and the first LE Audio communication module 101c may also have a corresponding codec (not shown). Please note that in this article, various components, such as classic Bluetooth communication module, LE Audio communication module, codec, etc., can be implemented by SOC (system on chip), for example, various RISC (reduced instruction set computer) processor IPs purchased from ARM and the like can be used as processors of SOC to perform corresponding functions, and can be implemented as embedded systems. Specifically, there are many modules on the modules (IPs) available on the market, such as but not limited to memory, various communication modules, codecs, buffers, etc. Others such as antennas and speakers can be connected to the chip externally. Users can implement various communication modules, codecs, etc. by building ASICs (application-specific integrated circuits) based on purchased IP or self-developed modules to reduce power consumption and costs. For example, users can also use FPGAs (field programmable gate arrays) to implement various communication modules, codecs, etc., which can be used to verify the stability of the hardware design. For various communication modules, codecs, etc., a buffer can usually be equipped to temporarily store the data generated during the processing process. The so-called "classic Bluetooth" in this article can include any of Bluetooth BR (Bluetooth Basic Rate) and Bluetooth EDR (Bluetooth Enhanced Data Rate).

[0027] The first classic Bluetooth communication module 101a is configured to communicate with a smart device 105 (such as a smart device 105 that supports the classic Bluetooth mode but not the LE Audio mode) via Figure 2), receiving the first audio data from the smart device 105, and transmitting the communication-related parameters of the classic Bluetooth connection to the second classic Bluetooth communication module 102a. Among them, the smart device 105 may also include a classic Bluetooth communication module but may not have any LE Audio communication module, just like the common configuration of most mobile phones available on the market. Further, the first audio data can be decoded and encoded for transmission. For example, based on the audio signal transmitted by the classic Bluetooth connection, SBC encoding is supported when the A2DP protocol is adopted, but several other encoding methods can also be adopted, such as MPEG-1, 2Audio, MPEG-2, 4AAC, ATRAC family, etc. The first headset 101 can receive the above various encoded first audio data from the smart device 105, and then decode it into PCM (pulse code modulation) code, and then encode it with the above various encoding methods or LC3 / LC3+ and other encoding methods for transmission to other Bluetooth devices.

[0028] The first classic Bluetooth communication module 101a of the first earphone 101 transmits the communication-related parameters of the classic Bluetooth connection to the second classic Bluetooth communication module 102a of the second earphone 102. The second classic Bluetooth communication module 102a is configured to intercept the classic Bluetooth connection and receive the first audio data based on the received communication-related parameters of the classic Bluetooth connection. The first earphone 101 and the second earphone 102 can also communicate with each other, and transmit the relevant parameters of the classic Bluetooth connection, such as the Bluetooth address of the smart device 105, the encryption parameters of the Bluetooth communication between the first earphone 101 and the smart device 105, to the second earphone 102, so that the second earphone 102 does not need to perform pairing and establishment of the Bluetooth connection, but can receive the first audio data sent by the smart device 105 by intercepting. The second earphone 102 receives relevant parameters of the classic Bluetooth connection through the first earphone 101, and can disguise itself as the first earphone 101 to communicate with the smart device 105. That is to say, the second earphone 102 does not need to go through the process of establishing a classic Bluetooth connection with the smart device 105 like the first earphone 101, but can directly disguise itself as the first earphone 101 to communicate with the first smart device 103.

[0029] At least one of the first conversion codec 101b and the second conversion codec 102b is configured to decode the first audio data received by the first earphone 101 and the second earphone 102 respectively and encode them in an applicable coding method of the LE Audio mode to obtain second audio data. For the second audio data, the applicable coding method in the LE Audio mode includes the LC3 / LC3+ coding method. In this way, the second audio data can be used for LE Audio transmission for the first LE Audio communication module 101c and the second LE Audio communication module 102c. Specifically, the first conversion codec 101b includes a first conversion encoder 1011b and a first conversion decoder 1012b. The second conversion codec 102b includes a second conversion encoder 1021b and a second conversion decoder 1022b. The first conversion decoder 1012b and the second conversion decoder 1022b are each configured to decode the first audio data into PCM code, and the first conversion encoder 1011b and the second conversion encoder 1021b are each configured to encode the PCM code in an applicable encoding method of the LE Audio mode (for example but not limited to LC3 / LC3+).

[0030] In some embodiments, the first conversion decoder 1012b and the first conversion encoder 1011b can be independently provided from the codec (not shown) cooperating with the first classic Bluetooth communication module 101a and the codec cooperating with the first LE Audio communication module 101c. Similarly, the second conversion decoder 1022b and the second conversion encoder 1021b can also be independently provided from the codec cooperating with the second classic Bluetooth communication module 102a and the codec cooperating with the second LE Audio communication module 102c. In some other embodiments, the first conversion decoder 1012b and the second conversion decoder 1022b can be implemented by using the decoding part (not shown) in the codec cooperating with the first classic Bluetooth communication module 101a and the second classic Bluetooth communication module 102a, respectively, and the first conversion encoder 1011b and the second conversion encoder 1021b can be implemented by using the encoding part (not shown) in the codec cooperating with the first LE Audio communication module 101c and the second LE Audio communication module 102c, respectively. Therefore, the information transmission method can be adjusted and the operation process of the encoding part and the decoding part can be controlled while retaining the relevant software and hardware configurations, which can achieve lower costs, high user friendliness, and better meet the compact space requirements of miniaturized audio playback devices.

[0031] At least one of the first LE Audio communication module 101c and the second LE Audio communication module 102c is configured to obtain the second audio data, and transmit the second audio data to another pair of earphones supporting the LE Audio mode via LE Audio in the surrounding area for audio sharing. As a result, the other pair of earphones can obtain the audio data and play it, thereby realizing the local audio of the existing smart device 105 that does not support LE Audio, and only needs to use the improved first wireless headset 101 and the second wireless headset 102 according to the embodiment of the present invention to achieve stable and low-cost music sharing with another pair of earphones. For example, the first audio data from the first classic Bluetooth communication module 101a and the second classic Bluetooth communication module 102a can be stored in a buffer for access and decoding by the first conversion codec 101b and / or the second conversion codec 102b, and the second audio data applicable to the LE Audio mode converted by the first conversion codec 101b and / or the second conversion codec 102b can also be stored in a buffer for transmission by the first LE Audio communication module 101c and / or the second LE Audio communication module 102c. This has good compatibility with existing hardware structures, low modification costs, a more compact structure, and high user-friendliness.

[0032] Figure 2 A schematic diagram showing audio sharing between a first earphone 101, a second earphone 102 and another pair of earphones according to an embodiment of the present invention is shown.

[0033] To support multi-stream audio, LE Audio introduces Connected Isochronous Group (CIG) and Connected Isochronous Stream (CIS). The interval between adjacent CIG events is the CIG event interval. A CIG event can include multiple CIS events to support multi-connection data stream transmission with one master and multiple slaves, where each CIS event can serve as a CIS instance. The synchronous connection stream CIS is a point-to-point data transmission stream between a host and a specific slave (Slave, Link Layer), and is a bidirectional communication protocol with confirmation. In addition, each CIS event can be divided into at least one or more CIS subevents. These CIS subevents are the time periods when the host and a specific slave use a specific synchronous connection PDU to exchange data packets, and each CIS subevent corresponds to a timing table to indicate whether each time slot is a sending time slot or a receiving time slot.

[0034] In some embodiments, at least one of the first LE Audio communication module 101c and the second LE Audio communication module 102c is configured to enable the first earphone 101 and / or the second earphone 102 to send PDUs with the other pair of earphones via CIS connection. Based on the CIS connection, the first earphone 101 and the second earphone 102 can receive feedback from the other pair of earphones during the process of sending PDUs. For example, if the left earphone in the other pair of earphones receives the PDU correctly, the next PDU will continue to be sent. If there is an error in the received PDU, the PDU will be resent. Therefore, the above process can ensure that the other pair of earphones correctly receives the audio data sharing, and when the audio data PDU has been correctly received, unnecessary PDU retransmission will no longer be performed. Therefore, the reliability and sharing efficiency of audio data sharing can be improved at the same time, and under certain circumstances, the power consumption of the first earphone 101, the second earphone 102 and the other pair of earphones can also be reduced accordingly. Specific feedback examples will be described in detail below.

[0035] like Figure 2 , the first earphone 101 sends a PDU to another pair of earphones (the earphones include the third earphone 103 and the fourth earphone 104) based on the first CIS connection 1 and the second CIS connection 2 as an example for explanation. This example is only one of the cases where the first earphone 101 and the second earphone 102 send a PDU to another pair of earphones, and does not constitute a specific limitation on the scope of protection. Figure 2 The third CIS connection 3 and the fourth CIS connection 4 shown in the figure are indicated by dotted lines, which is intended to illustrate that the second earphone 102 can also send PDUs to the third earphone 103 and the fourth earphone 104 based on the third CIS connection 3 and the fourth CIS connection 4. In some embodiments, the first earphone 101 can send PDUs to another pair of earphones based on the first CIS connection 1 and the second earphone 102 can send PDUs to another pair of earphones based on the fourth CIS connection 4, or the first earphone 101 can send PDUs to another pair of earphones based on the second CIS connection 2 and the second earphone 102 can send PDUs to another pair of earphones based on the third CIS connection 3, so that the two CIS connections in a CIG come from different earphones, thereby avoiding mutual interference between the two CIS connections issued by the same earphone, and thus improving the reliability of audio data sharing. Among them, different transmission methods will be described in detail below.

[0036] As shown in FIG. 3( a ), the other pair of earphones includes a third earphone 103 and a fourth earphone 104 , wherein the third earphone 103 includes a third LE Audio communication module 103 c , and the fourth earphone 104 includes a fourth LE Audio communication module 104 c .

[0037] In some embodiments, the third LE Audio communication module 103c and the fourth LE Audio communication module 104c are each configured to, when one earphone in the other pair of on-ear headphones correctly receives the PDU via a CIS connection, enable one earphone in the other pair of on-ear headphones to send an ACK to the first earphone 101 or the second earphone 102 via the CIS connection to notify the first earphone 101 and / or the second earphone 102 that one earphone or both earphones in the other pair of on-ear headphones have correctly received the PDU. The first LE Audio communication module 101c and the second LE Audio communication module 102c are each further configured to, after receiving the ACK, enable the first earphone 101 and / or the second earphone 102 to continue transmitting the next PDU instead of continuing to resend the PDU that has been correctly received.

[0038] Specifically, as shown in FIG3(b), the first headset 101 sends a PDU to the third headset 103 and the fourth headset 104 based on the first CIS connection 1 and the second CIS connection 2 as an example. When the first headset 101 sends a PDU to the third headset 103 based on the first CIS connection 1, if the third headset 103 correctly receives the PDU sent by the first headset 101, the third headset 103 sends an ACK to the first headset 101 based on the first CIS connection 1. After receiving the ACK sent by the third headset 103, the first headset 101 continues to send the next PDU and does not continue to resend the PDU that the third headset 103 has correctly received, thereby improving the transmission efficiency of the PDU and reducing power consumption. Similarly, the first headset 101 sends a PDU to the fourth headset 104 based on the second CIS connection 2. After the fourth headset 104 correctly receives the PDU sent by the first headset 101, it sends an ACK to the first headset 101 based on the second CIS connection 2. The first earphone 101, the second earphone 102 and another pair of earphones share audio data, send PDU based on CIS connection, and obtain feedback from the other pair of earphones in time, thereby improving the efficiency of sharing audio data with the other pair of earphones, and reducing the power consumption of the first earphone 101, the second earphone 102 and another pair of earphones.

[0039] In some embodiments, the third LE Audio communication module 103c and the fourth LE Audio communication module 104c are each configured to, when one earphone in the other pair of on-ear headphones is connected via a CIS and the received PDU has an error, make one earphone in the other pair of on-ear headphones send NAK or not send ACK to the first earphone 101 and / or the second earphone 102 via the CIS connection, so as to notify the first earphone 101 and the second earphone 102 that the PDU received by the other pair of on-ear headphones has an error. Further, the first LE Audio communication module 101c and the second LE Audio communication module 102c are each further configured to, when receiving the NAK or not receiving the ACK, make the first earphone 101 and / or the second earphone 102 continue to resend the PDU that was not correctly received, so as to ensure that the other pair of on-ear headphones can obtain the correct PDU, so as to ensure the reliability of audio data sharing. As an example, as shown in FIG3(c), the first earphone 101 sends a PDU to the third earphone 103 based on the first CIS connection 1. When the PDU received by the third earphone 103 is erroneous, the third earphone 103 sends a NAK or does not reply an ACK to the first earphone 101 based on the first CIS connection 1. When the first earphone 101 receives a NAK or does not receive an ACK, it knows that the PDU received by the third earphone 103 is erroneous, and then continues to resend the PDU that the third earphone 103 has not received correctly. When the PDU received by the third earphone 103 based on the first CIS connection 1 is erroneous, the PDU received by the fourth earphone 104 based on the second CIS connection 2 may be correct. At this time, the fourth earphone 104 sends an ACK to the first earphone 101 based on the second CIS connection 2. Then, the first earphone 101 will not continue to resend the PDU that the fourth earphone 104 has received correctly based on the second CIS connection 2, but will continue to send the next PDU. In this way, it can be ensured that the other pair of earphones correctly receive the audio data sent by the first earphone 101 and the second earphone 102, thereby improving the reliability of audio data sharing.

[0040] FIG4(a) shows a schematic diagram of a wireless headset sharing audio data with another pair of on-ear headsets according to an embodiment of the present invention. As shown in FIG4(a), the first headset 101 establishes a first CIS connection and a first ACL connection (Asynchronous Connection less) with the third headset 103, and establishes a second CIS connection and a second ACL connection with the fourth headset 104. At this time, the first headset 101 establishes two CIS connections to form a CIG, and sends PDUs to another pair of on-ear headsets. As shown in the connection mode indicated by the dotted lines in FIG4(a), the second headset 102 establishes a third CIS connection and a third ACL connection with the third headset 103, and establishes a fourth CIS connection and a fourth ACL connection with the fourth headset 104. The dotted lines in FIG4(a) indicate that the second headset 102 establishes two CIS connections to form a CIG, and sends PDUs to another pair of on-ear headsets. This is only used as an exemplary illustration.

[0041] Further, the first LE Audio communication module 101c and the second LE Audio communication module 102c are each configured to switch the first headset 101 and the second headset 102 when the signal quality of the third ACL connection and the fourth ACL connection is better than the signal quality of the first CIS connection and the second CIS connection or better than the signal quality of the first ACL connection and the second ACL connection, so that the PDU is sent on the third CIS connection and the fourth CIS connection with higher signal quality. The wireless connection signal quality can be characterized by one or a combination of wireless signal RSSI, wireless reception PER, BER, PLR, etc. There is no specific limitation on the signal quality comparison method, as long as it can be set to compare which channel has better signal quality. For example, it can be determined based on the comparison of the average value of the signal quality of the two CIS connections or the minimum value of the signal quality of the two with a certain threshold. For example, it is pre-set that the signal quality of the connection with a signal quality higher than threshold 1 is higher. Assuming that the average value of the signal quality of the third ACL connection and the fourth ACL connection is higher than threshold 1, and the average value of the signal quality of the first CIS connection and the second CIS connection is lower than threshold 1, or the average value of the signal quality of the first ACL connection and the second ACL connection is lower than threshold 1, it can be considered that the signal quality of the third ACL connection and the fourth ACL connection is better than the signal quality of the first CIS connection and the second CIS connection or better than the signal quality of the first ACL connection and the second ACL connection. In which, when the CIS connection is established, the ACL connection will be established at the same time. However, even if the CIS connection is not established, the ACL connection can still be established. Therefore, in the absence of a CIS connection, it is still possible to provide a basis for switching between the first headset 101 and the second headset 102 by monitoring the signal quality of the ACL connection.

[0042] Specifically, as shown in FIG4(b), in the process of the first earphone 101 sending a PDU to another pair of earphones, the switching of the first earphone 101 and the second earphone 102 is achieved by monitoring the signal quality of different connections as an exemplary explanation. As shown in FIG4(b), when the first earphone 101 sends PDUs to the third earphone 103 and the fourth earphone 104 based on the first CIS connection and the second CIS connection respectively, the average value a of the signal quality of the third ACL connection and the fourth ACL connection is monitored, and the average value b of the signal quality of the first CIS connection and the second CIS connection is obtained at the same time, and the average value a and the average value b are compared with the threshold 1. When the average value a is higher than the threshold 1 and the average value b is lower than the threshold 1, the first earphone 101 and the second earphone 102 are switched, that is, the first CIS connection and the second CIS connection are disconnected and the third CIS connection and the fourth CIS connection are established, so that the second earphone 102 sends PDUs to another pair of earphones based on the third CIS connection and the fourth CIS connection. Then, the signal quality of each connection continues to be monitored. In some cases, in order to reduce frequent switching, the first earphone 101 and the second earphone 102 may be switched only when the average value a exceeds the average value b by a threshold.

[0043] When the signal quality of the first ACL connection and the second ACL connection is better than the signal quality of the third CIS connection and the fourth CIS connection or better than the signal quality of the third ACL connection and the fourth ACL connection, the first headset 101 and the second headset 102 are switched so that the PDU is sent on the first CIS connection and the second CIS connection with higher signal quality. In this way, the PDU can always be transmitted on the connection with higher signal quality, ensuring the reliability of audio data sharing and the quality of data transmission. Among them, the configuration of the CIS connection of the first headset 101 and the second headset 102 is the same, and the synchronous processing of the audio data to be shared is always maintained. Therefore, it can be ensured that the audio data sent via the first CIS connection and the second CIS connection are exactly the same, so that the first headset 101 and the second headset 102 can be prevented from freezing during the switching process. In this embodiment, monitoring the signal quality of the first CIS connection, the second CIS connection, the third CIS connection and the fourth CIS connection can also be achieved based on the first ACL connection, the second ACL connection, the third ACL connection and the fourth ACL connection.

[0044] The first earphone 101 and the second earphone 102 are often located at the two ears of the user, respectively, and are located at different positions. Therefore, the relative positions of the two earphones and the third earphone 103 and the fourth earphone 104 are also different. In addition, there may be shielding between the first earphone 101, the second earphone 102 and another pair of earphones, and the fading of the received signal and the strength of the radio frequency signal of the first earphone 101 and the second earphone 102 are also different. In a period of time (such as 1ms or several ms or more than ten ms, tens of ms), the channel condition between the first earphone 101 or the second earphone 102 and the third earphone 103 or the fourth earphone 104 may be poor, while the channel condition with another earphone may be good. For example, at some times, the third earphone 103 may have a better channel condition with the first earphone 101, or the channel condition with the first earphone 101 may be better in a certain period of time, and the channel condition with the second earphone 102 may be better in another period of time. For example, at some time, the fourth earphone 104 may have a better channel condition with the first earphone 101, or the channel condition with the first earphone 101 may be better during a certain period of time, and the channel condition with the second earphone 102 may be better during another period of time. For example, at other times, the third earphone 103 may have a better channel condition with the second earphone 102, or the channel condition with the second earphone 102 may be better during a certain period of time, and the channel condition with the first earphone 101 may be better during another period of time. For example, at other times, the fourth earphone 104 may have a better channel condition with the second earphone 102, or the channel condition with the second earphone 102 may be better during a certain period of time, and the channel condition with the first earphone 101 may be better during another period of time. Therefore, by monitoring the signal quality of each connection and switching the earphone used for audio sharing between the first earphone 101 and the second earphone 102 according to the signal quality, the flexibility of audio sharing to the third earphone 103 and the fourth earphone 104 is greatly improved, and the quality of audio data shared by the first earphone 101 and the second earphone 102 to the third earphone 103 and the fourth earphone 104 is also improved.

[0045] In some embodiments, each of the first LE Audio communication module 101c and the second LE Audio communication module 102c is further configured to switch the first headset 101 and the second headset 102 when the signal quality of the third ACL connection is better than the signal quality of the first CIS connection or the first ACL connection, so that the PDU is sent on the CIS connection with higher signal quality, thereby improving the ability of the third headset 103 and the fourth headset 104 to receive audio data, so that the third headset 103 and the fourth headset 104 are not prone to lag. As shown in Figure 5(a), take the example of the first headset 101 sending PDU to the third headset 103 and the fourth headset 104 based on the first CIS connection and the second CIS connection. For example, it is monitored that the signal quality of the third ACL connection is higher than threshold 2, while the signal quality of the first CIS connection or the first ACL connection is lower than threshold 2. At this time, it is set that the connection with a signal quality higher than threshold 2 has a higher signal quality, that is, the signal quality of the third ACL connection is better than the signal quality of the first CIS connection. In this case, the third earphone 103 disconnects the first CIS connection with the first earphone 101, and chooses to establish a third CIS connection with the second earphone 102 with higher signal quality, so that the first earphone 101 sends PDU to the fourth earphone 104 based on the second CIS connection, and the second earphone 102 sends PDU to the third earphone 103 based on the third CIS connection. The second CIS connection and the third CIS connection form a CIG, that is, the two CIS connections in the same CIG come from different earphones, so as to ensure that each CIS connection used for audio sharing is a CIS connection with higher signal quality for the receiving end. In some cases, in order to reduce frequent switching, the switching between the first earphone 101 and the second earphone 102 can be performed only when the signal quality of the currently used CIS connection is lower than a threshold of the signal quality of the ACL connection corresponding to the CIS connection to which it may be switched.

[0046] The example shown in FIG5(a) is only one case, and there may be other cases. For example, when the second headset 102 sends a PDU to the third headset 103 and the fourth headset 104 based on the third CIS connection and the fourth CIS connection, if the signal quality of the second ACL connection is better than the signal quality of the fourth CIS connection or the fourth ACL connection, the first headset 101 and the second headset 102 are switched so that the PDU is sent on the CIS connection with higher signal quality.

[0047] Furthermore, when the signal quality of the fourth ACL connection is better than the signal quality of the second CIS connection or the second ACL connection, the first headset 101 and the second headset 102 are switched so that the PDU is sent on the CIS connection with higher signal quality.

[0048] In this way, the receiving capabilities of the third earphone 103 and the fourth earphone 104 are increased, and the occupied time slots between the first earphone 101 and the second earphone 102 and the third earphone 103 and the fourth earphone 104 can be reduced. Thus, the time slots for the first earphone 101 and the second earphone 102 to receive audio data from the smart device 105 are increased, thereby also improving the ability of the smart device 105 to send audio data to the first earphone 101 and the second earphone 102, thereby improving the transmission capacity of the entire audio data, improving the quality of the audio played by the first earphone 101, the second earphone 102, the third earphone 103, and the fourth earphone 104, and improving the user's experience of listening to audio.

[0049] Specifically, the first headset 101 still sends PDU to the third headset 103 and the fourth headset 104 based on the first CIS connection and the second CIS connection as an example, as shown in Figure 5(b). For example, it is monitored that the signal quality of the fourth ACL connection is higher than threshold 2, while the signal quality of the second CIS connection or the second ACL connection is lower than threshold 2. At this time, the connection with a signal quality higher than threshold 2 is set to have a higher signal quality, that is, the signal quality of the fourth ACL connection is better than the signal quality of the second CIS connection. In this case, the fourth headset 104 disconnects the second CIS connection with the first headset 101, and chooses to establish a fourth CIS connection with the second headset 102 with higher signal quality, so that the first headset 101 sends PDU to the third headset 103 based on the first CIS connection, and the second headset 102 sends PDU to the fourth headset 104 based on the fourth CIS connection. Among them, the first CIS connection and the fourth CIS connection form a CIG, that is, the two CIS connections in the same CIG also come from different headsets, which improves the audio sharing capability and the reliability of data transmission.

[0050] In another case, when the signal quality of the first ACL connection is better than the signal quality of the third CIS connection or the third ACL connection, the first headset 101 and the second headset 102 are switched so that the PDU is sent on the CIS connection with higher signal quality. This implementation is similar to the above implementation and will not be described in detail herein.

[0051] In some embodiments, the first earphone 101, the second earphone 102 and another pair of earphones play audio data in their respective corresponding channels. For example, when the first earphone 101 or the second earphone 102 sends LC3 / LC3+ audio frames to the third earphone 103 and the fourth earphone 104, they are sent in left and right channels respectively. When the first earphone 101 or the second earphone 102 performs LC3 / LC3+ audio encoding, the left channel and the right channel are encoded respectively, and the left and right channels are sent respectively. The left earphone of the third earphone 103 and the fourth earphone 104 only receives the left channel data, and the right earphone only receives the right channel data, which improves the transmission rate of the audio data. The first earphone 101 can also send the left channel and the right channel audio data, and the second earphone 102 can also send the left channel and the right channel audio data. Alternatively, the first earphone 101 can also send the left channel, and the second earphone 102 can send the right channel audio data. Alternatively, the second earphone 102 can also send the left channel, and the first earphone 101 can send the right channel audio data. The first earphone 101 and the second earphone 102 each send a sound channel, so that the power consumed by the first earphone 101 and the second earphone 102 is more balanced, thereby extending the total working time of the first earphone 101 and the second earphone 102.

[0052] Among them, the first earphone 101 and the second earphone 102 can simultaneously perform LC3 / LC3+ encoding on the audio signal to be transmitted, so that the transmitting earphone can be switched between the first earphone 101 and the second earphone 102 at any time. For example, the earphone that transmits the left channel audio data can be switched between the first earphone 101 and the second earphone 102 at any time. At the same time, the earphone that transmits the right channel audio data can be switched between the first earphone 101 and the second earphone 102 at any time. The first earphone 101 and the second earphone 102 simultaneously perform LC3 / LC3+ encoding on the audio signal to be transmitted, and the audio of the left and right channels can be encoded respectively in the first earphone 101 and the second earphone 102 at the same time, so that the transmitting earphone can be switched between the first earphone 101 and the second earphone 102 at any time. When encoding with LC3 / LC3+, it is necessary not only to use the PCM data of the current frame but also some audio signals of the previous frames. In order to allow the sending earphone to switch between the first earphone 101 and the second earphone 102 at any time without affecting the encoding performance and the audio quality, it is necessary to encode the audio of the left and right channels separately in the first earphone 101 and the second earphone 102 at the same time.

[0053] In some embodiments, the first LE Audio communication module 101c and the second LE Audio communication module 102c are each further configured to enable the first headset 101 to transmit control information to another pair of earphones based on the first ACL connection and the second ACL connection, and the second headset 102 to transmit control information to another pair of earphones based on the third ACL connection and the fourth ACL connection. Each ACL connection can be used to transmit volume control information, frequency hopping information, some parameter configurations of CIS connection, etc. In this application, each ACL connection can be used to monitor the signal quality of each corresponding CIS connection, for example, the channel quality status can be estimated by sending test data on the ACL connection, and the signal quality of each corresponding CIS connection can be obtained based on the channel quality status, etc. The specific method is not specifically limited in this application.

[0054] In some embodiments, the first classic Bluetooth communication module 101a and the second classic Bluetooth communication module 102a are each configured to, when one of the first earphone 101 and the second earphone 102 correctly receives the first audio data from the smart device 105, enable the one earphone to transmit indication information to the other earphone, the indication information indicating that the one earphone correctly receives the first audio data from the smart device. Figure 6 As shown, when the first earphone 101 correctly receives the first audio data from the smart device 105, the first earphone 101 sends indication information to the second earphone 102 in the next uplink frame period to transmit information to the second earphone 102, indicating that the first earphone 101 has correctly received the first audio data. Further, when the other earphone correctly receives the first audio data from the smart device 105 and receives the indication information, the other earphone sends ACK to the smart device 105 in the next uplink frame period. At this time, if the second earphone 102 also correctly receives the first audio data through interception, then, when the second earphone 102 learns that the first earphone 101 has correctly received the first audio data, it sends ACK to the smart device 105 to notify the smart device 105 that retransmission is not required. In this way, while ensuring that the first earphone 101 and the second earphone 102 both correctly receive the first audio data, it can also avoid the waste of power consumption caused by continuous retransmission of the smart device 105.

[0055] In some embodiments, the first classic Bluetooth communication module 101a and the second classic Bluetooth communication module 102a are each configured to, when one of the first earphone 101 and the second earphone 102 receives an error in the first audio data from the smart device 105, cause the first earphone to send a NAK or not send an ACK to the smart device 105 in the next uplink frame period, and the smart device 105 retransmits the first audio data when receiving the NAK or not receiving the ACK. Figure 7 As shown, assuming that the first headset 101 correctly receives the first audio data, the first headset 101 sends indication information to the second headset 102, so that the second headset 102 knows that the first headset 101 has correctly obtained the first audio data. The second headset 102 sends NAK or does not send ACK to the smart device 105 in the next uplink frame period. The smart device 105 knows that the wireless headset has not correctly received the first audio data, and will resend it until the smart device 105 receives the ACK sent by the first headset 101 or the second headset 102, so as to ensure that the wireless headset correctly receives the first audio data.

[0056] In some embodiments, the indication information includes an error correction code. When the other earphone receives the indication information including the error correction code, the other earphone uses the error correction code to correct the error bit in the received first audio data. When the error bit in the received first audio data is corrected by the error correction code, the other earphone sends ACK to the smart device 105 in the next uplink frame period. Specifically, the indication information includes the error correction code. There is a bit error in the data received by the second earphone 102. When the error correction code can correct the error bit in the data received by the second earphone 102, the second earphone 102 sends ACK to the smart device 105 in the next uplink frame period. The first earphone 101 and the second earphone 102 receive the same data from the smart device 105. When the first earphone 101 receives the data correctly, the error correction code can be generated by the data and transmitted to the second earphone 102. When there is a bit error in the data received by the second earphone 102, when the error correction code can correct the error bit in the data received by the second earphone 102, it can be considered that the second earphone 102 finally receives the first audio data correctly through the received data and the error correction code. The second headset 102 replies ACK to the smart device 105 in the next uplink frame period, and the smart device 105 does not need to resend the first audio data, thereby improving the communication quality while providing the transmission efficiency of the audio data.

[0057] Figure 8A flowchart of audio sharing between a wireless headset and another pair of earphones according to an embodiment of the present invention is shown, wherein the wireless headset comprises at least a first headset 101 and a second headset 102. In some embodiments, both the first headset 101 and the second headset 102 support LE Audio mode, and the audio sharing method of the wireless headset begins at step 801, where the first headset 101 receives first audio data from the smart device 105 via a classic Bluetooth connection of the smart device 105 that supports the classic Bluetooth mode but not the LE Audio mode. The smart device 105 may support the classic Bluetooth mode but not the LE Audio mode, as is the common configuration of most mobile phones available on the market.

[0058] Step 802 shows that the second earphone 102 acquires the first audio data from the smart device 105 by interception, that is, the second earphone 102 does not need to go through the process of establishing a classic Bluetooth connection with the smart device 105 like the first earphone 101, but directly disguises itself as the first earphone 101 to communicate with the smart device 105. The first earphone 101 is used to establish a classic Bluetooth connection with the smart device 105, but this is only an example, and the second earphone 102 can also be used to establish a classic Bluetooth connection with the smart device 105 as needed, that is, in some embodiments, the first earphone 101 and the second earphone 102 can be interchangeable. The smart device 105 can also include any of conventional cellular phones, mobile phones, mobile PCs, tablet computers, portable smart assistants, and smart wearable devices on the market that support the classic Bluetooth mode but do not support the LE Audio mode.

[0059] Step 803 shows that the first earphone 101 and the second earphone 102 decode the first audio data received by each other and encode it in an applicable coding method of the LE Audio mode to obtain second audio data. The second audio data encoded in an applicable coding method of the LE Audio mode can be used for transmission in the LE Audio mode. Step 804 shows that the first earphone 101 and the second earphone 102 transmit the second audio data to another pair of earphones supporting the LE Audio mode in the surrounding area via LE Audio for audio sharing, thereby improving the reliability of audio data sharing. It can be understood that Figure 8 The steps 801, 802, 803, 804, etc., do not necessarily indicate sequential execution. In some cases, only these steps are to be executed.

[0060] In some embodiments, a specific method for the first earphone 101 and the second earphone 102 to share audio with another pair of earphones supporting LE Audio mode in the surrounding area includes the first earphone 101 and / or the second earphone 102 sending PDUs to the other pair of earphones via a CIS connection, and feeding back the PDU reception status to the first earphone 101 and / or the second earphone 102 via the other pair of earphones, thereby improving data sharing efficiency and reducing power consumption.

[0061] In some embodiments, the audio sharing method includes, when one earphone in the other pair of on-ear headphones correctly receives the PDU via a CIS connection, one earphone in the other pair of on-ear headphones sends an ACK to the first earphone 101 or the second earphone 102 via the one CIS connection. After receiving the ACK, the first earphone 101 and / or the second earphone 102 continues to transmit the next PDU instead of continuing to resend the PDU that has been correctly received by the other pair of on-ear headphones, thereby reducing power consumption and improving data transmission efficiency.

[0062] In some embodiments, when one earphone in the other pair of on-ear headphones is connected via a CIS and the received PDU has an error, the one earphone in the other pair of on-ear headphones sends a NAK or does not send an ACK to the first earphone 101 or the second earphone 102 via the CIS connection. When the first earphone 101 and / or the second earphone 102 receives the NAK or does not receive the ACK, the first earphone 101 and / or the second earphone 102 continue to resend the PDU that the other pair of on-ear headphones did not correctly receive, so as to ensure that the other pair of on-ear headphones correctly receives the PDU sent from the first earphone 101 and the second earphone 102, thereby improving the accuracy of data transmission.

[0063] In some embodiments, the other pair of on-ear headphones includes a third headphone 103 and a fourth headphone 104. The first headphone 101 establishes a first CIS connection and a first ACL connection with the third headphone 103, and establishes a second CIS connection and a second ACL connection with the fourth headphone 104. Alternatively, the second headphone 102 establishes a third CIS connection and a third ACL connection with the third headphone 103, and establishes a fourth CIS connection and a fourth ACL connection with the fourth headphone 104. When the signal quality of the third ACL connection and the fourth ACL connection is better than the signal quality of the first CIS connection and the second CIS connection or better than the signal quality of the first ACL connection and the second ACL connection, the first headphone 101 and the second headphone 102 are switched so that the PDU is sent on the third CIS connection and the fourth CIS connection with higher signal quality. Or, when the signal quality of the first ACL connection and the second ACL connection is better than the signal quality of the third CIS connection and the fourth CIS connection or better than the signal quality of the third ACL connection and the fourth ACL connection, or the signal quality is better than a predetermined value 3, the first headset 101 and the second headset 102 are switched, so that the PDU is sent on the first CIS connection and the second CIS connection with higher signal quality. In this way, it can effectively ensure that the PDU is sent on a channel with higher signal quality, further ensuring the quality of audio data sharing.

[0064] In some embodiments, when the signal quality of the third ACL connection is better than the signal quality of the first CIS connection or the first ACL connection, or when the signal quality of the second ACL connection is better than the signal quality of the fourth CIS connection or the fourth ACL connection, or the signal quality is better than a predetermined value 3, the first headset 101 and the second headset 102 are switched so that the PDU is sent on the CIS connection with higher signal quality. Or, when the signal quality of the fourth ACL connection is better than the signal quality of the second CIS connection or the second ACL connection, or when the signal quality of the first ACL connection is better than the signal quality of the third CIS connection or the third ACL connection, or the signal quality is better than a predetermined value 3, the first headset 101 and the second headset 102 are switched so that the PDU is sent on the CIS connection with higher signal quality. In this way, the two CIS connections in the same CIG come from the first headset 101 and the second headset 102 respectively, thereby further improving the reliability of data transmission and the quality of audio data sharing.

[0065] The above description is intended to be illustrative rather than restrictive. For example, the above examples (or one or more of them) can be used in combination with each other. For example, a person of ordinary skill in the art can use other embodiments when reading the above description. In addition, in the above-mentioned specific embodiments, various features can be grouped together to simplify the present invention. This should not be interpreted as an intention that a disclosed feature that is not required to be protected is necessary for any claim. On the contrary, the subject matter of the present invention may be less than all the features of a specific disclosed embodiment. Thus, the following claims are incorporated into the specific embodiments as examples or embodiments, wherein each claim is independently used as a separate embodiment, and it is considered that these embodiments can be combined with each other in various combinations or arrangements. The scope of the present invention should be determined with reference to the attached claims and the full scope of equivalent forms granted by these claims.

Claims

1. A wireless headset, comprising at least a first headset and a second headset, characterized in that: The first headset includes a first classic Bluetooth communication module, a first conversion codec and a first LE Audio communication module; the second headset includes a second classic Bluetooth communication module, a second conversion codec and a second LE Audio communication module; The first classic Bluetooth communication module is configured to: receive first audio data from the smart device via a classic Bluetooth connection of the smart device supporting the classic Bluetooth mode but not the LE Audio mode; and transmit communication-related parameters of the classic Bluetooth connection to the second classic Bluetooth communication module; The second classic Bluetooth communication module is configured to: based on the received communication-related parameters of the classic Bluetooth connection, listen to the classic Bluetooth connection and receive the first audio data; At least one of the first conversion codec and the second conversion codec is configured to: decode the first audio data received by the first earphone and the second earphone respectively and encode the first audio data in an applicable encoding manner of the LE Audio mode to obtain second audio data; At least one of the first LE Audio communication module and the second LE Audio communication module is configured to: obtain the second audio data; transmit the second audio data to another pair of earphones supporting the LE Audio mode in the surrounding area via LE Audio, so that the first earphone and / or the second earphone and the other pair of earphones are connected in a CIS to send PDUs for audio sharing. The other pair of earphones comprises a third earphone and a fourth earphone; The first headset establishes a first CIS connection and a first ACL connection with the third headset, and establishes a second CIS connection and a second ACL connection with the fourth headset; The second headset establishes a third CIS connection and a third ACL connection with the third headset, and establishes a fourth CIS connection and a fourth ACL connection with the fourth headset; The first LE Audio communication module and the second LE Audio communication module are each configured as: When the signal quality of the third ACL connection and the fourth ACL connection is better than the signal quality of the first CIS connection and the second CIS connection or better than the signal quality of the first ACL connection and the second ACL connection, switching the first headset and the second headset so that the PDU is sent on the third CIS connection and the fourth CIS connection with higher signal quality; Or, when the signal quality of the first ACL connection and the second ACL connection is better than the signal quality of the third CIS connection and the fourth CIS connection or better than the signal quality of the third ACL connection and the fourth ACL connection, the first earphone and the second earphone are switched so that the PDU is sent on the first CIS connection and the second CIS connection with higher signal quality.

2. The wireless headset according to claim 1, characterized in that: The first conversion codec includes a first conversion encoder and a first conversion decoder, the second conversion codec includes a second conversion encoder and a second conversion decoder, the first conversion decoder and the second conversion decoder are each configured to decode the first audio data into a PCM code, and the first conversion encoder and the second conversion encoder are each configured to encode the PCM code in an applicable encoding method of the LE Audio mode.

3. The wireless headset according to claim 1, characterized in that: The other pair of earphones includes a third earphone and a fourth earphone; the third earphone includes a third LE Audio communication module, and the fourth earphone includes a fourth LE Audio communication module; The first earphone and / or the second earphone is connected to the other pair of earphones via a CIS to send the PDU, and the third LE Audio communication module and the fourth LE Audio communication module are each configured as follows: When one earphone of the other pair of earphones receives the PDU correctly via a CIS connection, causing the one earphone of the other pair of earphones to send an ACK to the first earphone or the second earphone via the CIS connection; The first LE Audio communication module and the second LE Audio communication module are each further configured to: after receiving the ACK, enable the first earphone and / or the second earphone to continue to transmit the next PDU instead of continuing to resend the PDU that has been correctly received.

4. The wireless headset according to claim 3, characterized in that: The third LE Audio communication module and the fourth LE Audio communication module each: When one earphone in the other pair of earphones is connected via a CIS and a received PDU has an error, causing the one earphone in the other pair of earphones to send a NAK or not send an ACK to the first earphone and / or the second earphone via the CIS connection; The first LE Audio communication module and the second LE Audio communication module are each further configured to: in the case of receiving the NAK or not receiving the ACK, enable the first headset and / or the second headset to continue to resend the PDU that was not correctly received.

5. The wireless headset according to claim 1, characterized in that: The first LE Audio communication module and the second LE Audio communication module are each further configured as: When the signal quality of the third ACL connection is better than the signal quality of the first CIS connection or the first ACL connection, or when the signal quality of the second ACL connection is better than the signal quality of the fourth CIS connection or the fourth ACL connection, switching the first headset and the second headset is performed so that the PDU is sent on the CIS connection with higher signal quality; Or, when the signal quality of the fourth ACL connection is better than the signal quality of the second CIS connection or the second ACL connection, or when the signal quality of the first ACL connection is better than the signal quality of the third CIS connection or the third ACL connection, the first earphone and the second earphone are switched so that the PDU is sent on the CIS connection with higher signal quality.

6. The wireless headset according to claim 1 or 5, characterized in that: The first LE Audio communication module and the second LE Audio communication module are each further configured to enable the first headset to transmit control information to another pair of earphones based on the first ACL connection and the second ACL connection, and the second headset to transmit control information to another pair of earphones based on the third ACL connection and the fourth ACL connection.

7. The wireless headset according to claim 1, characterized in that: The first classic Bluetooth communication module and the second classic Bluetooth communication module are each configured to: when one of the first earphone and the second earphone correctly receives the first audio data from the smart device, enable the one earphone to transmit indication information to the other earphone, wherein the indication information indicates that the one earphone correctly receives the first audio data from the smart device; In the case that the other earphone correctly receives the first audio data from the smart device and receives the indication information, the other earphone sends an ACK to the smart device in the next uplink frame period.

8. The wireless headset according to claim 7, characterized in that: The first classic Bluetooth communication module and the second classic Bluetooth communication module are respectively configured to: when there is an error in the first audio data received by one of the first earphone and the second earphone from the smart device, enable the one earphone to send NAK or not send ACK to the smart device in the next uplink frame period; when the smart device receives the NAK or does not receive the ACK, resend the first audio data.

9. The wireless headset according to claim 7, characterized in that: The indication information includes an error correction code; when the other earphone receives the indication information including the error correction code, it uses the error correction code to correct the erroneous bits in the received first audio data; when the erroneous bits in the received first audio data are corrected by using the error correction code, it sends an ACK to the smart device in the next uplink frame period.

10. A method for sharing audio of a wireless headset, the wireless headset comprising at least a first headset and a second headset, characterized in that: The first earphone includes a first classic Bluetooth communication module, a first conversion codec, and a first LE Audio communication module; the second earphone includes a second classic Bluetooth communication module, a second conversion codec, and a second LE Audio communication module, the first earphone and the second earphone both support the LE Audio mode, and the audio sharing method includes: The first headset receives the first audio data from the smart device via a classic Bluetooth connection of the smart device that supports the classic Bluetooth mode but not the LE Audio mode; The second earphone acquires the first audio data from the smart device by listening; The first earphone and the second earphone decode the first audio data respectively received and encode the first audio data in an applicable encoding manner of the LE Audio mode to obtain second audio data; The first earphone and the second earphone transmit the second audio data to another pair of earphones supporting the LE Audio mode via LE Audio, so that the first earphone and / or the second earphone and the other pair of earphones are connected in a CIS to send PDUs for audio sharing; The other pair of earphones comprises a third earphone and a fourth earphone; The first headset establishes a first CIS connection and a first ACL connection with the third headset, and establishes a second CIS connection and a second ACL connection with the fourth headset; The second headset establishes a third CIS connection and a third ACL connection with the third headset, and establishes a fourth CIS connection and a fourth ACL connection with the fourth headset; The first LE Audio communication module and the second LE Audio communication module are each configured as: When the signal quality of the third ACL connection and the fourth ACL connection is better than the signal quality of the first CIS connection and the second CIS connection or better than the signal quality of the first ACL connection and the second ACL connection, switching the first headset and the second headset so that the PDU is sent on the third CIS connection and the fourth CIS connection with higher signal quality; Or, when the signal quality of the first ACL connection and the second ACL connection is better than the signal quality of the third CIS connection and the fourth CIS connection or better than the signal quality of the third ACL connection and the fourth ACL connection, the first earphone and the second earphone are switched so that the PDU is sent on the first CIS connection and the second CIS connection with higher signal quality.

11. The audio sharing method according to claim 10, characterized in that: The other pair of earphones includes a third earphone and a fourth earphone; the third earphone includes a third LE Audio communication module, and the fourth earphone includes a fourth LE Audio communication module; The audio sharing method comprises: when one earphone in the other pair of earphones receives the PDU correctly via a CIS connection, the one earphone in the other pair of earphones sends an ACK to the first earphone or the second earphone via the CIS connection; After receiving the ACK, the first earphone and / or the second earphone continues to transmit the next PDU, and no longer continues to resend the PDU that has been correctly received by the other pair of earphones.

12. The audio sharing method according to claim 11, characterized in that: When one earphone in the other pair of earphones is connected via a CIS and a received PDU has an error, the one earphone in the other pair of earphones sends a NAK or does not send an ACK to the first earphone and / or the second earphone via the CIS connection; When receiving the NAK or not receiving the ACK, the first earphone and / or the second earphone continue to resend the PDU that the other pair of earphones has not correctly received.

13. The audio sharing method according to claim 10, characterized in that: When the signal quality of the third ACL connection is better than the signal quality of the first CIS connection or the first ACL connection, or when the signal quality of the second ACL connection is better than the signal quality of the fourth CIS connection or the fourth ACL connection, switching the first headset and the second headset is performed so that the PDU is sent on the CIS connection with higher signal quality; Or, when the signal quality of the fourth ACL connection is better than the signal quality of the second CIS connection or the second ACL connection, or when the signal quality of the first ACL connection is better than the signal quality of the third CIS connection or the third ACL connection, the first earphone and the second earphone are switched so that the PDU is sent on the CIS connection with higher signal quality.

Images