CN114979900A

CN114979900A - Wireless earphone and audio sharing method

Info

Publication number: CN114979900A
Application number: CN202210555506.3A
Authority: CN
Inventors: 童伟峰; 张亮
Original assignee: Bestechnic Shanghai Co Ltd
Current assignee: Bestechnic Shanghai Co Ltd
Priority date: 2022-05-19
Filing date: 2022-05-19
Publication date: 2022-08-30

Abstract

The invention provides a wireless headset and an audio sharing method. The first earphone comprises a first classic Bluetooth communication module, a first conversion codec and a first LE Audio communication module, and the second earphone comprises a second classic Bluetooth communication module, a second conversion codec and a second LE Audio communication module. At least one of the first LE Audio communication module and the second LE Audio communication module is configured to acquire the second Audio data, transmit the second Audio data to another pair of headphones whose peripheries support the LE Audio mode via the LE Audio, and perform Audio sharing. So, can use with the smart machine cooperation that only supports classic bluetooth, conveniently and let the user use LE Audio mode to enjoy the music sharing function with low costs.

Description

Wireless earphone and audio sharing method

Technical Field

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

Today's social life puts a demand on social sharing for audio playback. For example, a person may desire to conveniently share his or her music with one or more other groups of users. LE Audio is a new wireless communication mode, and its unique LE Audio broadcasting function enables providing an Audio sharing experience. While attempts have been made to perform Audio sharing functions using LE Audio broadcasts, such functions typically rely on portable smart devices (such as, but not limited to, cell phones) that support LE Audio technology. However, since the LE Audio technology is just beginning to be popularized, most bluetooth protocols in bluetooth communication modes of mobile phones in the market generally support the classic bluetooth technology, at most, only Core spec5.2 is supported, the LE Audio technology is rarely supported, the cost of replacing the mobile phone is too high only for increasing the Audio sharing function, and the popularization and application of the Audio sharing function are hindered.

For a user, the current Audio sharing function is usually shared unidirectionally from a portable smart device held by the user to a wireless Audio playing component, such as a wireless paired headset, held by the user, or unidirectionally from portable smart devices of other users to the portable smart device of the user, so that it is ensured that the portable smart device supports LE Audio technology, which is relatively costly and not beneficial to popularization. Further, the limited sharing direction is not only high in cost, but also limits the application scenes of music sharing, reduces the reliability of music sharing (because the portable intelligent device is heavily relied on as a broadcast provider), and has a further improvement space in user experience.

Disclosure of Invention

The present invention has been made to solve the above-mentioned problems occurring in the prior art. The invention provides a wireless earphone and an Audio sharing method, which can be used by a user in cooperation with the existing intelligent equipment only supporting the classic Bluetooth technology, so that the user can conveniently and inexpensively enjoy the music sharing function in an LE Audio mode, the wireless earphone can better receive Audio data from the intelligent equipment only supporting the classic Bluetooth technology, the wireless earphone is suitable for application scenes of music sharing among different wireless earphones (such as among the ear wireless earphones of different users), and the music listening experience of the user is improved.

According to a first aspect of the invention, there is provided a wireless headset comprising at least a first headset and a second headset. The first earphone comprises a first classical 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 transcoding codec and a second LE Audio communication module. The first classic bluetooth communication module is configured to receive first Audio data from a smart device via a classic bluetooth connection of the smart device supporting a classic bluetooth mode instead of an LE Audio mode, and to 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 listen to the classic bluetooth connection and receive the first audio data based on the received communication-related parameters of the classic bluetooth connection. At least one of the first and second transcoding codecs is configured to decode first Audio data received by the first and second headphones, and encode the first Audio data in an encoding mode applicable to an 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 acquire the second Audio data; and transmitting the second Audio data through the LE Audio to another pair of headphone pairs whose peripheries support the LE Audio mode so as to perform Audio sharing.

According to a second aspect of the present invention, there is provided an Audio sharing method for wireless headsets, the wireless headsets including at least a first headset and a second headset, the first and second headsets each supporting LE Audio mode, the Audio sharing method comprising receiving, by the first headset, first Audio data from a smart device supporting classic bluetooth mode but not LE Audio mode via a classic bluetooth connection of the smart device. The second earphone acquires first Audio data from the intelligent equipment through interception, the first earphone and the second earphone decode the received first Audio data and encode the first Audio data in an applicable encoding mode of an LE Audio mode to obtain second Audio data, and the first earphone and the second earphone transmit the second Audio data to another pair of earphones which support the LE Audio mode peripherally so as to share Audio.

Compared with the prior art, the embodiment of the invention has the beneficial effects that:

by utilizing the wireless earphone according to the embodiments of the invention, a user can directly cooperate with the existing intelligent equipment only supporting the classic Bluetooth technology for use, so that the user can conveniently and inexpensively enjoy the music sharing function by using the LE Audio mode, the wireless Audio playing component can better receive the Audio data from the intelligent equipment only supporting the classic Bluetooth technology, and the wireless Audio playing component is suitable for the application scene of music sharing among different wireless earphones, thereby improving the music listening experience of the user.

The foregoing general description and the following detailed description are exemplary and explanatory only and are not intended to limit the invention as claimed.

Drawings

In the drawings, which are not necessarily drawn to scale, like reference numerals may describe similar parts throughout the different views. Like reference numerals having letter suffixes or different letter suffixes may represent different examples of similar components. The drawings illustrate generally, by way of example, but not by way of limitation, various embodiments and, together with the description and the claims, serve to explain 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.

Fig. 1 shows a schematic illustration of a wireless headset according to an embodiment of the invention;

FIG. 2 shows a schematic diagram of a first earpiece, a second earpiece, and another pair of opposed-ear earpieces for audio sharing, according to an embodiment of the invention;

FIG. 3(a) shows a schematic illustration of another pair of headphones according to an embodiment of the invention;

fig. 3(b) shows a schematic diagram of a first headset transmitting PDUs to another pair of headphones according to an embodiment of the invention;

fig. 3(c) shows another schematic diagram of a first headset transmitting PDUs to another pair of headphones according to an embodiment of the invention;

fig. 4(a) shows a schematic diagram of a wireless headset sharing audio data to another pair of headphones according to an embodiment of the invention;

fig. 4(b) is a schematic diagram illustrating switching between a first headset and a second headset when a wireless headset shares audio data with another pair of headphones according to an embodiment of the present invention;

fig. 5(a) shows another schematic diagram of switching between a first headset and a second headset when a wireless headset shares audio data with another pair of headphones according to an embodiment of the present invention;

fig. 5(b) is a schematic diagram illustrating switching between a first headset and a second headset when a wireless headset shares audio data with another pair of headphones according to an embodiment of the present invention;

fig. 6 shows a timing diagram of a wireless headset communicating with a smart device according to an embodiment of the invention;

FIG. 7 illustrates another timing diagram for a wireless headset communicating with a smart device according to an embodiment of the present invention;

fig. 8 illustrates a flow diagram for audio sharing of a wireless headset with another pair of headphones according to an embodiment of the present invention.

Detailed Description

In order to make the technical solutions of the present invention better understood, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The following detailed description of embodiments of the invention is provided in connection with the accompanying drawings and the detailed description of embodiments of the invention, but is not intended to limit the invention. The terms "first," "second," "third," and "fourth" as used herein are intended merely to distinguish between corresponding features, and do not necessarily denote a requirement of such ordering, nor do they necessarily denote the singular form or importance, but rather are used to distinguish one element from another. The terms "first earphone", "second earphone", "third earphone" and "fourth earphone" are used herein only to distinguish, for example, in other embodiments, the "first earphone" may be the "second earphone", "third earphone" or "fourth earphone", the "second earphone" may be the "first earphone", "third earphone" or "fourth earphone", and so on. The word "comprising" or "comprises", and the like, means that the element preceding the word covers the element listed after the word, and does not exclude the possibility that other elements are also covered. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

In the present invention, arrows shown in the figures of the respective steps are only used as examples of the execution sequence, and are not limited, and the technical solution of the present invention is not limited to the execution sequence described in the embodiments, and the respective steps in the execution sequence may be executed in a combined manner, may be executed in a split manner, and may be exchanged in order as long as the logical relationship of the execution content is not affected.

All terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs unless specifically defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

Fig. 1 shows a schematic illustration of a wireless headset according to an embodiment of the invention. Wherein the wireless headset comprises at least a first headset 101 and a second headset 102. The first earpiece 101 comprises a first classical bluetooth communication module 101a, a first conversion codec 101b and a first LE Audio communication module 101c, and the second earpiece 102 comprises a second classical bluetooth communication module 102a, a second conversion codec 102b and a second LE Audio communication module 102 c. In particular, the first typical 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). Note that herein, various components, such as a classic bluetooth communication module, an LE Audio communication module, a codec, and the like, may be implemented by an SOC (system on chip), such as various RISC (reduced instruction set computer) processors IP available from ARM corporation and the like may be utilized as a processor of the SOC to perform corresponding functions, which may be implemented as an embedded system. In particular, there are many modules on commercially available modules (IPs), such as, but not limited to, memory, various communication modules, codecs, buffers, etc. Other components such as an antenna and speaker may be attached to the chip. A user can implement various communication modules, codecs, and the like by constructing an ASIC (application specific integrated circuit) based on purchased IP or an autonomously developed module in order to reduce power consumption and cost. For example, a user may also use an FPGA (field programmable gate array) to implement various communication modules, codecs, and the like, and may be used to verify the stability of a hardware design. Buffers are also typically provided for various communication modules, codecs, etc. to temporarily store data generated during processing. The "classic bluetooth" referred to herein may include any one of bluetooth BR (bluetooth basic rate) and bluetooth EDR (bluetooth enhanced data rate).

The first classic bluetooth communication module 101a is configured to receive first Audio data from a smart device 105 (as in fig. 2) supporting a classic bluetooth mode instead of the LE Audio mode via a classic bluetooth connection with the smart device 105 and to transmit communication related parameters of the classic bluetooth connection to the second classic bluetooth communication module 102 a. The smart device 105 may also include a classic bluetooth communication module but may not have any LE Audio communication module, as is common in most commercially available handsets. Further, the first audio data may be decoded and encoded for transmission. For example, based on the Audio signals transmitted by the classical bluetooth connection, SBC encoding is supported in case of using the A2DP protocol, but several other encoding schemes may be used, such as MPEG-1,2Audio, MPEG-2,4AAC, ATRAC families, etc., and the first earpiece 101 may receive the above encoded first Audio data from the smart device 105, then decode it into a PCM (pulse code modulation) code, and then encode it in the above encoding schemes or LC3/LC3+ encoding schemes for transmission to other bluetooth devices.

The first classic bluetooth communication module 101a of the first headset 101 transmits communication-related parameters of the classic bluetooth connection to the second classic bluetooth communication module 102a of the second headset 102. The second classical bluetooth communication module 102a is configured to listen to the classical bluetooth connection and receive the first audio data based on the received communication-related parameters of the classical bluetooth connection. The first headset 101 and the second headset 102 may also communicate with each other, and transmit related parameters of a classic bluetooth connection, such as a bluetooth address of the smart device 105, and encryption parameters of bluetooth communication between the first headset 101 and the smart device 105, to the second headset 102, so that the second headset 102 can receive the first audio data transmitted by the smart device 105 through listening without performing pairing and establishment of a bluetooth connection. The second earpiece 102, receiving the parameters related to the classic bluetooth connection via the first earpiece 101, may masquerade as the first earpiece 101 and the smart device 105 to communicate, i.e. the second earpiece 102 does not need to go through the process of establishing the classic bluetooth connection with the smart device 105 as the first earpiece 101 does, but masquerades as the first earpiece 101 and the first smart device 103 directly.

At least one of the first and second transition codecs 101b and 102b is configured to decode the first Audio data received by the first and

second earphones

101 and 102 and encode the first Audio data in an encoding mode applicable to the LE Audio mode to obtain second Audio data. And for the second Audio data, the applicable coding mode in the LE Audio mode comprises an LC3/LC3+ coding mode. As such, the second Audio data is available to the first LE Audio communication module 101c and the second LE Audio communication module 102c for LE Audio transmission. Specifically, the first transform codec 101b includes a first transform coder 1011b and a first transform decoder 1012 b. The second transform codec 102b includes a second transform encoder 1021b and a second transform decoder 1022 b. The first transform decoder 1012b and the second transform decoder 1022b are each configured to decode the first Audio data into a PCM code, and the first transform encoder 1011b and the second transform encoder 1021b are each configured to encode the PCM code in an applicable encoding manner of LE Audio mode (e.g., without limitation, LC3/LC3 +).

In some embodiments, first transform decoder 1012b and first transform encoder 1011b may be provided separately from a codec (not shown) associated with first typical bluetooth communication module 101a and a codec associated with first LE Audio communication module 101 c. Similarly, the second transcoder 1022b and the second transcoder 1021b may be separate from the codec associated with the second classic bluetooth communication module 102a and the codec associated with the second LE Audio communication module 102 c. In still other embodiments, the first and second transcoders 1012b and 1022b may be implemented using decoding portions (not shown) in codecs that cooperate with the first and second classical bluetooth communication modules 101a and 102a, respectively, and the first and second transcoders 1011b and 1021b may be implemented using encoding portions (not shown) in codecs that cooperate with the first and second LE Audio communication modules 101c and 102c, respectively. Therefore, the information transmission mode is adjusted and the operation processes of the coding part and the decoding part are controlled under the condition of keeping the configuration of relevant software and hardware, so that the realization cost is lower, the user friendliness is high, and the requirement of compact space of a miniaturized audio playing device can be better met.

At least one of the first LE Audio communication module 101c and the second LE Audio communication module 102c is configured to acquire the second Audio data, transmit the second Audio data to another pair of headphones whose peripheries support the LE Audio mode, and perform Audio sharing via the LE Audio. Therefore, another pair of earphones can acquire and play Audio data, so that the local Audio of the existing intelligent device 105 which does not support LE Audio is realized, and the music sharing with the other pair of earphones at a stable and low cost can be realized only by using the improved first wireless earphone 101 and the improved second wireless earphone 102 according to the embodiment of the invention. For example, first Audio data from the first classical bluetooth communication module 101a and the second classical bluetooth communication module 102a may be stored in a buffer for the first conversion codec 101b and/or the second conversion codec 102b to access and perform the decoding process, and second Audio data applicable to the LE Audio mode converted by the first conversion codec 101b and/or the second conversion codec 102b may also be stored in a buffer for the first LE Audio communication module 101c and/or the second LE Audio communication module 102c to transmit.

Fig. 2 shows a schematic diagram of a first earphone 101, a second earphone 102 and another pair of headphones for audio sharing according to an embodiment of the present invention.

To support multi-Stream Audio, LE Audio introduced a Connected Isochronous Group (CIG) and a Connected Isochronous Stream (CIS). The interval of adjacent CIG events is a CIG event interval, and one CIG event can comprise a plurality of CIS events for supporting multi-connection data stream transmission of one master and a plurality of slaves, wherein each CIS event can be used as a CIS instance. The synchronous connection stream CIS is a point-to-point data transmission stream between a master and a specific Slave (Slave), and is a bidirectional communication protocol with acknowledgement. Further, each CIS event may be divided into at least one or more CIS sub-events (subevents) that are periods when the master and the specific slave exchange packets using a specific synchronous connection PDU, and each CIS sub-event corresponds to a timing table indicating whether each slot is a transmission slot or a reception slot.

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 earpiece 101 and/or the second earpiece 102 to transmit PDUs in a CIS connection with the other pair of headphones. Based on the CIS connection, the first earphone 101 and the second earphone 102 can receive another feedback to the pair of earphones in the process of transmitting the PDU, for example, the other pair of earphones receives the PDU correctly, the next PDU is continuously transmitted, and if the received PDU has an error, the PDU is retransmitted, so that the above process can ensure that the other pair of earphones receives the audio data correctly, and can also not retransmit the PDU unnecessarily under the condition that the audio data PDU has been received correctly, so that the reliability and the sharing efficiency of audio data sharing can be improved at the same time, and under certain conditions, the power consumption of the first earphone 101, the second earphone 102 and the other pair of earphones can also be correspondingly reduced. Specific feedback examples will be described in detail below.

As shown in fig. 2, the first earphone 101 transmits a PDU to another pair of earphones (for example, the pair of earphones includes a third earphone 103 and a fourth earphone 104) based on the first CIS connection 1 and the second CIS connection 2. The example is only one of the cases where the first earphone 101 and the second earphone 102 transmit the PDU to another pair of earphones, and does not constitute a specific limitation to the protection range. The third CIS connection 3 and the fourth CIS connection 4 shown in fig. 2 are both indicated with dashed lines, which is intended to illustrate that PDUs can also be transmitted by the second earpiece 102 to the third earpiece 103, the fourth earpiece 104 based on the third CIS connection 3 and the fourth CIS connection 4. In some embodiments, the first earphone 101 may send the PDU to another pair of earphones based on the first CIS connection 1 and the second earphone 102 based on the fourth CIS connection 4, or the first earphone 101 may send the PDU to another pair of earphones based on the second CIS connection 2 and the third CIS connection 3, so that the two CIS connections in one CIG are from different earphones, thereby avoiding mutual interference between the two CIS connections sent by the same earphone, and thus also improving reliability of audio data sharing. The different transmission modes will be described in detail below.

As shown in fig. 3(a), the other pair of headphones includes a third headphone 103 and a fourth headphone 104, the third headphone 103 includes a third LE Audio communication module 103c, and the fourth headphone 104 includes a fourth LE Audio communication module 104 c.

In some embodiments, the third LE Audio communication module 103c and the fourth LE Audio communication module 104c are each configured to cause one of the other pair of headphones to send an ACK to the first headphone 101 or the second headphone 102 via one of the CIS connections to notify the first headphone 101 and/or the second headphone 102 that the PDU was properly received by one or both of the other pair of headphones if the PDU was properly received by the one of the other pair of headphones via the one of the CIS connections. The first LE Audio communication module 101c and the second LE Audio communication module 102c are each further configured to cause the first earpiece 101 and/or the second earpiece 102 to continue transmitting the next PDU after receiving the ACK without continuing to retransmit PDUs that have been correctly received.

Specifically, as shown in fig. 3(b), the first earphone 101 transmits PDUs to the third earphone 103 and the fourth earphone 104 based on the first CIS connection 1 and the second CIS connection 2. When the first earphone 101 sends the PDU to the third earphone 103 based on the first CIS connection 1, if the third earphone 103 correctly receives the PDU sent by the first earphone 101, the third earphone 103 sends ACK to the first earphone 101 based on the first CIS connection 1, and after receiving the ACK sent by the third earphone 103, the first earphone 101 continues to send the next PDU without continuing to retransmit the PDU that the third earphone 103 has correctly received, thereby improving the transmission efficiency of the PDU and reducing the power consumption. Similarly, the first earphone 101 sends the PDU to the fourth earphone 104 based on the second CIS connection 2, and after the fourth earphone 104 correctly receives the PDU sent by the first earphone 101, the ACK is sent to the first earphone 101 based on the second CIS connection 2. The first earphone 101, the second earphone 102 and the other pair of earphones share audio data, PDU sending is achieved based on CIS connection, and the other pair of earphones can be timely obtained to feed back the other pair of earphones, so that the efficiency of audio data sharing of the other pair of earphones is improved, and meanwhile, the power consumption of the first earphone 101, the second earphone 102 and the other pair of earphones can be reduced.

In some embodiments, the third LE Audio communication module 103c and the fourth LE Audio communication module 104c are each configured to cause one of the other pair of headphones to send a NAK or no ACK to the first headphone 101 and/or the second headphone 102 via one CIS connection to notify the first headphone 101 and the second headphone 102 that the PDU received by the other pair of headphones has an error if the PDU received by the one of the other pair of headphones has an error via the one CIS connection. Further, the first LE Audio communication module 101c and the second LE Audio communication module 102c are each further configured to, in the case that the NAK is received or the ACK is not received, cause the first earphone 101 and/or the second earphone 102 to continue retransmitting the PDU that is not correctly received, thereby ensuring that the other pair of headphones can acquire the correct PDU, so as to ensure reliability of Audio data sharing. As an example, as shown in fig. 3(c), the first headset 101 transmits a PDU to the third headset 103 based on the first CIS connection 1, and in the case where the PDU received by the third headset 103 is in error, the third headset 103 transmits a NAK or does not reply an ACK to the first headset 101 based on the first CIS connection 1. When the first earpiece 101 knows that the PDU received by the third earpiece 103 is erroneous when receiving a NAK or not receiving an ACK, it continues to retransmit PDUs that the third earpiece 103 did not correctly receive. In case the PDU received by the third earpiece 103 based on the first CIS connection 1 is erroneous, the PDU received by the fourth earpiece 104 based on the second CIS connection 2 may be correct, at this point, the fourth earpiece 104 sends an ACK to the first earpiece 101 based on the second CIS connection 2, and the first earpiece 101 will not continue to retransmit the PDU that the fourth earpiece 104 has correctly received based on the second CIS connection 2, but will continue to send a next PDU. Therefore, the other pair of the earphones can be ensured to correctly receive the audio data sent by the first earphone 101 and the second earphone 102, and the reliability of audio data sharing is improved.

Fig. 4(a) is a schematic diagram illustrating a wireless headset sharing audio data with another pair of headphones according to an embodiment of the present invention. As shown in fig. 4(a), the first headset 101 establishes a first CIS Connection and a first ACL Connection (Asynchronous connectionless) with the third headset 103, and establishes a second CIS Connection and a second ACL Connection with the fourth headset 104. At this point, two CIS connections are established by the first earpiece 101 to form one CIG, and PDUs are sent to the other pair of headphones. As shown by the connection manner indicated by the dotted line in fig. 4(a), the second earphone 102 establishes a third CIS connection and a third ACL connection with the third earphone 103, and establishes a fourth CIS connection and a fourth ACL connection with the fourth earphone 104. The dashed lines in fig. 4(a) indicate that the second earpiece 102 establishes two CIS connections to form one CIG and transmits PDUs to the other pair of headphones. This is merely an exemplary illustration.

Further, the first LE Audio communication module 101c and the second LE Audio communication module 102c are each configured to perform switching between the first earphone 101 and the second earphone 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 transmission of the PDU is performed on the third CIS connection and the fourth CIS connection with higher signal quality. The signal quality of the wireless connection can be characterized by one or a combination of the RSSI of the wireless signal, the PER of the wireless reception, the BER, the PLR and the like. The comparison method of the signal quality is not particularly limited as long as it is possible to compare which channel has the better signal quality by setting. For example, it may be determined based on a comparison of the average value of the signal quality of two CIS connections or the minimum value of the signal quality in both with a certain threshold value. For example, it is set in advance that the signal quality of the connection having the signal quality higher than the threshold value 1 is high, and it is assumed that the average value of the signal quality of the third ACL connection and the fourth ACL connection is higher than the threshold value 1, and the average value of the signal quality of the first CIS connection and the second CIS connection is lower than the threshold value 1, or the average value of the signal quality of the first ACL connection and the second ACL connection is lower than the threshold value 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 the signal quality of the first ACL connection and the second ACL connection. In the case where the CIS connection is established, the ACL connection is simultaneously established, but even if the CIS connection is not established, the ACL connection can still be established. Therefore, in the case where there is no CIS connection, it is still possible to provide a basis for switching between the first earphone 101 and the second earphone 102 by monitoring the signal quality of the ACL connection.

Specifically, as shown in fig. 4(b), switching between the first earphone 101 and the second earphone 102 is realized by monitoring the signal quality of different connections during the process of transmitting PDU from the first earphone 101 to the other pair of earphones. As shown in fig. 4(b), in the case where the first earphone 101 transmits 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 monitored first CIS connection and the second CIS connection is simultaneously obtained, and the average value a and the average value b are compared with the threshold value 1. When the average value a is higher than the threshold value 1 and the average value b is lower than the threshold value 1, switching between the first earphone 101 and the second earphone 102 is performed, 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 transmits the PDU to another pair of ear earphones based on the third CIS connection and the fourth CIS connection. Then, the monitoring of the signal quality of each connection is continued. In some cases, to reduce frequent switching, switching of the first earpiece 101 and the second earpiece 102 may be performed only when the average value a exceeds the average value b by a threshold.

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 the signal quality of the third ACL connection and the fourth ACL connection, switching between the first earphone 101 and the second earphone 102 is performed so that the PDU is transmitted over the first CIS connection and the second CIS connection having higher signal quality. Therefore, the PDU can be transmitted on the connection with higher signal quality all the time, and the reliability of audio data sharing and the data transmission quality are ensured. The CIS connections of the first earphone 101 and the second earphone 102 are configured identically, and synchronous processing of audio data to be shared is always maintained, so that it can be ensured that audio data sent out through the first CIS connection and the second CIS connection are completely identical, and jamming of the first earphone 101 and the second earphone 102 in a switching process can be avoided. 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 may also be implemented based on the first ACL connection, the second ACL connection, the third ACL connection, and the fourth ACL connection.

The first earphone 101 and the second earphone 102 are often located at two ears of the user, respectively, and are different in position, and therefore, the relative positions of the two earphones to the third earphone 103 and the fourth earphone 104 are also different. Furthermore, there may be a block between the first earphone 101 and the second earphone 102 and another pair of earphones, and the fading (fading) of the signals received by the first earphone 101 and the second earphone 102 and the strength of the radio frequency signals are also different. During a period of time (e.g., 1ms or several ms or tens of ms, tens of ms), it is possible that the channel condition between the first earphone 101 or the second earphone 102 and the third earphone 103 or the fourth earphone 104 is poor and the channel condition with the other earphone is good. For example, at some times the channel condition may be better with the first earpiece 101 for the third earpiece 103, or better with the first earpiece 101 for some time and better with the second earpiece 102 for another time. For example, at some point the channel condition may be better with the first earpiece 101 for the fourth earpiece 104, or better with the first earpiece 101 for some time and better with the second earpiece 102 for another time. For example, at other times, the channel condition may be better with the second earphone 102 for the third earphone 103, or better with the second earphone 102 for a certain period of time and better with the first earphone 101 for another period of time. For example, at other times, the channel condition with the second earphone 102 may be better for the fourth earphone 104, or the channel condition with the second earphone 102 may be better for a certain period of time and the channel condition with the first earphone 101 may be better for another period of time. Therefore, by monitoring the signal quality of each connection, and switching the earphones 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 meanwhile, 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.

In some embodiments, the first LE Audio communication module 101c and the second LE Audio communication module 102c are each further configured to perform switching between the first earphone 101 and the second earphone 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 transmitted over the CIS connection with higher signal quality, thereby improving the capability of the third earphone 103 and the fourth earphone 104 to receive Audio data, and making the third earphone 103 and the fourth earphone 104 less prone to jamming. As shown in fig. 5(a), the first headphone 101 transmits PDUs to the third headphone 103 and the fourth headphone 104 based on the first CIS connection and the second CIS connection. For example, if the signal quality of the third ACL connection is monitored to be above threshold 2 and the signal quality of the first CIS connection or the first ACL connection is monitored to be below threshold 2, then the connection with a signal quality above threshold 2 is set to have a higher signal quality, i.e. the signal quality of the third ACL connection is better than the signal quality of the first CIS connection. In this case, the third earpiece 103 disconnects the first CIS connection to the first earpiece 101, and selects to establish a third CIS connection with the second earpiece 102 having a higher signal quality, so that the first earpiece 101 transmits PDUs to the fourth earpiece 104 based on the second CIS connection, and the second earpiece 102 transmits PDUs to the third earpiece 103 based on the third CIS connection. The second CIS connection and the third CIS connection form a CIG, namely, two CIS connections in the same CIG are from different earphones respectively, so that the CIS connections used for audio sharing are all CIS connections with higher signal quality for a receiving end. In some cases, to reduce frequent switching, switching of the first earpiece 101 and the second earpiece 102 may be performed only when the currently used CIS connection has a signal quality that is below a threshold value that it may be switched to the ACL connection to which the CIS connection corresponds.

The example shown in fig. 5(a) is only one case, and there may be other cases. For example, when the second earphone 102 transmits the PDU to the third earphone 103 and the fourth earphone 104 based on the third CIS connection and the fourth CIS connection, and 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, the first earphone 101 and the second earphone 102 are switched so that the PDU is transmitted on the CIS connection having a higher signal quality.

Further, 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, switching between the first earphone 101 and the second earphone 102 is performed, so that the PDU is transmitted over the CIS connection having a higher signal quality.

In this way, the receiving capability of the third earphone 103 and the fourth earphone 104 is increased, and the time slots occupied by the first earphone 101 and the second earphone 102 to the third earphone 103 and the fourth earphone 104 can be reduced. Therefore, the time slots for the first earphone 101 and the second earphone 102 to receive the audio data of the intelligent device 105 are increased, the capability of the intelligent device 105 to send the audio data to the first earphone 101 and the second earphone 102 is also improved, the transmission capability of the whole audio data is improved, the quality of the audio played by the first earphone 101, the second earphone 102, the third earphone 103 and the fourth earphone 104 is improved, and the experience of a user listening to the audio is improved.

Specifically, still taking the example that the first earphone 101 transmits PDUs to the third earphone 103 and the fourth earphone 104 based on the first CIS connection and the second CIS connection, as specifically shown in fig. 5 (b). For example, if the signal quality of the fourth ACL connection is monitored to be above threshold 2 and the signal quality of the second CIS connection or the second ACL connection is monitored to be below threshold 2, the connection with a signal quality above threshold 2 is set to have a higher signal quality, i.e. the signal quality of the fourth ACL connection is better than the signal quality of the second CIS connection. In this case, the fourth earpiece 104 disconnects the second CIS connection with the first earpiece 101, and selects to establish the fourth CIS connection with the second earpiece 102 having the higher signal quality, so that the first earpiece 101 transmits PDUs to the third earpiece 103 based on the first CIS connection, and the second earpiece 102 transmits PDUs to the fourth earpiece 104 based on the fourth CIS connection. The first CIS connection and the fourth CIS connection form a CIG, namely, two CIS connections in the same CIG are from different earphones, so that the audio sharing capability and the data transmission reliability are improved.

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 earphone 101 and the second earphone 102 are switched so that the PDU is transmitted over the CIS connection having the higher signal quality. This embodiment is similar to the above embodiment and will not be described in detail herein.

In some embodiments, the first earpiece 101, the second earpiece 102, and the other pair of headphones play audio data in respective corresponding channels. For example, when the first headphone 101 or the second headphone 102 transmits LC3/LC3+ audio frames to the third headphone 103 and the fourth headphone 104, left and right channels are transmitted separately. When the first headphone 101 or the second headphone 102 performs LC3/LC3+ audio coding, the left channel and the right channel are coded and transmitted separately. 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, so that the transmission rate of the audio data is improved. The first earpiece 101 may also transmit left channel, right channel audio data, or the second earpiece 102 may transmit left channel, right channel audio data. Alternatively, the first headphone 101 may transmit the left channel and the second headphone 102 may transmit the right channel audio data. Still alternatively, the second headphone 102 may transmit the left channel and the first headphone 101 may transmit the right channel audio data. The first earphone 101 and the second earphone 102 each transmit a sound channel, so that the electric quantity consumed by the first earphone 101 and the second earphone 102 is more balanced, and the total working time of the first earphone 101 and the second earphone 102 is prolonged.

The first earphone 101 and the second earphone 102 can perform LC3/LC3+ encoding on the audio signal to be transmitted 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. For example, the headphone for transmitting the left channel audio data is switched between the first headphone 101 and the second headphone 102 at any time. And simultaneously, the earphone sending the right channel audio data is 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 left and right audio channels can be encoded on 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. In LC3/LC3+, it is necessary to encode the left and right audio channels in the first headphone 101 and the second headphone 102 simultaneously, so that the headphones can be switched between the first headphone 101 and the second headphone 102 at any time without affecting the encoding performance and the audio quality, based on the PCM data of the current frame and some audio signals of the previous frames.

In some embodiments, the first LE Audio communication module 101c and the second LE Audio communication module 102c are each further configured to cause the first earpiece 101 to transmit control information to another pair of earpieces based on the first ACL connection, the second ACL connection, and the second earpiece 102 based on the third ACL connection, the fourth ACL connection. In this application, each ACL connection may be used to monitor the signal quality of each corresponding CIS connection, for example, by sending test data over the ACL connection to estimate the channel quality status, and obtain the signal quality of each corresponding CIS connection based on the channel quality status, and the specific manner is not specifically limited in this application.

In some embodiments, the first classic bluetooth communication module 101a and the second classic bluetooth communication module 102a are each configured to cause one of the first earpiece 101 and the second earpiece 102 to transmit an indication to the other earpiece in the event that the one earpiece correctly receives the first audio data from the smart device 105, the indication indicating that the one earpiece correctly receives the first audio data from the smart device. As shown in fig. 6, in case that 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, in case the other headset correctly received the first audio data from the smart device 105 and received the indication information, an ACK is sent by the other headset to the smart device 105 in the next uplink frame period. At this time, if the second headphone 102 happens to correctly receive the first audio data by listening, in the case where the second headphone 102 knows that the first headphone 101 has correctly received the first audio data, an ACK is sent to the smart device 105 to notify the smart device 105 that retransmission is not needed. Therefore, under the condition that the first earphone 101 and the second earphone 102 both correctly receive the first audio data, the waste of power consumption caused by continuous retransmission of the intelligent device 105 can be avoided.

In some embodiments, the first classic bluetooth communication module 101a and the second classic bluetooth communication module 102a are each configured to cause one of the first earpiece 101 and the second earpiece 102 to send a NAK or no ACK to the smart device 105 in the next uplink frame period if the first audio data received by the one earpiece from the smart device 105 is in error, the smart device 105 resending the first audio data if the NAK or the ACK is received. As shown in fig. 7, assuming that the first headphone 101 correctly receives the first audio data, the first headphone 101 sends an indication message to the second headphone 102 so that the second headphone 102 knows that the first headphone 101 has correctly acquired the first audio data. The second earpiece 102 sends a NAK or no ACK to the smart device 105 in the next uplink frame period, and the smart device 105 knows that the wireless earpiece did not correctly receive the first audio data, and retransmits until the smart device 105 receives the ACK sent by the first earpiece 101 or the second earpiece 102, so as to ensure that the wireless earpiece correctly receives the first audio data.

In some embodiments, the indication information includes an error correction code, and the other earphone corrects an erroneous bit in the received first audio data by using the error correction code when receiving the indication information including the error correction code, and sends an ACK to the smart device 105 in a next uplink frame period when correcting the erroneous bit in the received first audio data by using the error correction code. Specifically, the indication information includes an error correction code, the data received by the second earphone 102 has a bit error, and when the error bit in the data received by the second earphone 102 can be corrected by using the error correction code, the second earphone 102 sends an ACK to the smart device 105 in the next uplink frame period. The first earpiece 101 and the second earpiece 102 receive the same data from the smart device 105. When the first earphone 101 receives data correctly, error correction codes can be generated by the data and transmitted to the second earphone 102, and when the data received by the second earphone 102 has bit errors, and when the error correction codes can correct the error bits 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 codes. The second headphone 102 replies ACK to the smart device 105 in the next uplink frame period, and the smart device 105 does not need to retransmit the first audio data, thereby improving the communication quality and providing the transmission efficiency of the audio data.

Fig. 8 shows a flow diagram for audio sharing of a wireless headset comprising at least a first headset 101 and a second headset 102 with another pair of headphones according to an embodiment of the invention. In some embodiments, the first earpiece 101 and the second earpiece 102 both support LE Audio mode, and the Audio sharing method for wireless earpieces begins at step 801 by the first earpiece 101 receiving first Audio data from the smart device 105 via a classic bluetooth connection of the smart device 105 that supports classic bluetooth mode instead of LE Audio mode. The smart device 105 may support the classic bluetooth mode but not the LE Audio mode, as is common in most commercially available handsets.

Step 802 shows that the second earpiece 102 acquires the first audio data from the smart device 105 by listening, i.e. the second earpiece 102 does not have to go through the process of establishing a classic bluetooth connection with the smart device 105 as the first earpiece 101 does, but masquerades directly as the first earpiece 101 communicates with the smart device 105. The first earpiece 101 is used to establish a classic bluetooth connection with the smart device 105, but this is merely an example, and the second earpiece 102 may be used to establish a classic bluetooth connection with the smart device 105 as desired, i.e. in some embodiments the first earpiece 101 and the second earpiece 102 may be interchanged. The smart device 105 may also include any of the commercially conventional cellular phones, cell phones, mobile PCs, tablets, portable smart assistants, smart wearable appliances that support the classic bluetooth mode but do not support the LE Audio mode.

Step 803 shows that the first earphone 101 and the second earphone 102 decode the received first Audio data and encode the first Audio data in an encoding manner applicable to LE Audio mode to obtain second Audio data. The second Audio data obtained by encoding in the applicable encoding mode 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 whose peripheries support the LE Audio mode via the LE Audio for Audio sharing, thereby improving the reliability of Audio data sharing. It is to be understood that the

various steps

801, 802, 803, 804, etc. described in fig. 8 do not necessarily represent sequential execution, and in some cases represent execution of only those steps.

In some embodiments, a specific method for Audio sharing by the first earphone 101 and the second earphone 102 to another pair of earphones whose peripheries support LE Audio mode includes that the first earphone 101 and/or the second earphone 102 and the another pair of earphones are connected in CIS to transmit a PDU, and the another pair of earphones feeds back the PDU reception to the first earphone 101 and/or the second earphone 102, so that the efficiency of data sharing is improved and the power consumption is reduced.

In some embodiments, the audio sharing method comprises sending an ACK to the first earpiece 101 or the second earpiece 102 via one CIS connection by one of the other pair of headphones in the event that the PDU is correctly received by the other pair of headphones via the one CIS connection. The first earpiece 101 and/or the second earpiece 102 continues to transmit the next PDU after receiving the ACK, and does not continue to retransmit PDUs that have been correctly received by another pair of headphones, thereby reducing power consumption and improving efficiency of data transmission.

In some embodiments, in case there is an error in the received PDU, one of the other pair of headphones sends NAK or no ACK to the first headphone 101 or the second headphone 102 via one CIS connection. The first earphone 101 and/or the second earphone 102 continues to retransmit PDUs which are not correctly received by another pair of the earphones under the condition that the NAK is received or the ACK is not received, so as to ensure that the PDUs transmitted by the first earphone 101 and the second earphone 102 are correctly received by the other pair of the earphones, and the accuracy of data transmission is improved.

In some embodiments, the other pair of headphones comprises a third headphone 103, a fourth headphone 104. The first earphone 101 establishes a first CIS connection and a first ACL connection with the third earphone 103, and establishes a second CIS connection and a second ACL connection with the fourth earphone 104. Or, the second earphone 102 establishes a third CIS connection and a third ACL connection with the third earphone 103, and establishes a fourth CIS connection and a fourth ACL connection with the fourth earphone 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 the signal quality of the first ACL connection and the second ACL connection, switching between the first earphone 101 and the second earphone 102 is performed so that the PDU is transmitted over the third CIS connection and the fourth CIS connection having higher signal quality. Or, in the case that 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 more than a predetermined value 3, switching between the first earphone 101 and the second earphone 102 is performed so that the transmission of the PDU is performed on the first CIS connection and the second CIS connection having higher signal quality. Therefore, the PDU can be effectively sent on the channel with higher signal quality, and the audio data sharing quality is further ensured.

In some embodiments, in case the signal quality of the third ACL connection is better than the signal quality of the first CIS connection or first ACL connection, or in case the signal quality of the second ACL connection is better than the signal quality of the fourth CIS connection or fourth ACL connection, or the signal quality is better than more than a predetermined value 3, the switching of the first earpiece 101 and the second earpiece 102 is performed such that the transmission of the PDU is performed on the CIS connection with the 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 more than a predetermined value 3, the first earphone 101 and the second earphone 102 are switched, so that the PDU is transmitted on the CIS connection with higher signal quality. Thus, two CIS connections in the same CIG are respectively from the first earphone 101 and the second earphone 102, thereby further improving the reliability of data transmission and the quality of audio data sharing.

The above description is intended to be illustrative and not restrictive. For example, the above-described examples (or one or more versions thereof) may be used in combination with each other. For example, other embodiments may be used by those of ordinary skill in the art upon reading the above description. In addition, in the above-described embodiments, various features may be grouped together to streamline the disclosure. This should not be interpreted as an intention that a non-claimed disclosed feature is essential to any claim. Rather, inventive subject matter may lie in less than all features of a particular disclosed embodiment. Thus, the following claims are hereby incorporated into the detailed description as examples or embodiments, with each claim standing on its own as a separate embodiment, and it is contemplated that these embodiments may be combined with each other in various combinations or permutations. The scope of the invention should be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled.

Claims

1. A wireless headset comprising at least a first headset and a second headset, wherein the first headset comprises a first typical bluetooth communication module, a first conversion codec, and a first LE Audio communication module; the second earphone 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: receiving first Audio data from a smart device supporting a classic bluetooth mode instead of an LE Audio mode via a classic bluetooth connection of the smart device; transmitting communication-related parameters of the classic bluetooth connection to the second classic bluetooth communication module;

the second classic bluetooth communication module 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;

at least one of the first and second translation codecs is configured to: decoding the first Audio data received by the first earphone and the second earphone respectively and coding the first Audio data in an applicable coding mode of an 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: acquiring the second audio data; and transmitting the second Audio data through the LE Audio to another pair of headphone pairs whose peripheries support the LE Audio mode so as to perform Audio sharing.

2. The wireless headset of claim 1, wherein the first transcoder codec comprises a first transcoder and the second transcoder comprises a second transcoder and a second transcoder, each of the first transcoder and the second transcoder configured to decode the first Audio data into a PCM code, each of the first transcoder and the second transcoder configured to encode the PCM code with an applicable encoding scheme in LE Audio mode.

3. The wireless headset of claim 1, wherein at least one of the first LE Audio communication module and the second LE Audio communication module is configured to: causing the first earphone and/or the second earphone to transmit the PDU with the other pair of the earphones in a CIS connection.

4. A wireless headset according to claim 3, wherein the further pair of anti-ear headphones comprises a third headphone, a fourth headphone; the third earpiece includes a third LE Audio communication module and the fourth earpiece includes a fourth LE Audio communication module;

transmitting, by the first and/or second headset, a PDU in a CIS connection with the other pair of headphones, the third and fourth LE Audio communication modules each configured to:

causing one of the other pair of headphones to send an ACK to the first headphone or the second headphone via one CIS connection if the PDU is properly received by the one of the other pair of headphones via the one CIS connection;

the first LE Audio communication module and the second LE Audio communication module are each further configured to: after receiving the ACK, causing the first earpiece and/or the second earpiece to continue transmitting a next PDU without continuing to retransmit PDUs that have been correctly received.

5. The wireless headset of claim 4, wherein the third LE Audio communication module and the fourth LE Audio communication module each:

in the case that one of the other pair of headphones is connected via one CIS and there is an error in the received PDU, causing the one of the other pair of headphones to send a NAK or no ACK to the first and/or second headphones via the one CIS connection;

the first LE Audio communication module and the second LE Audio communication module are each further configured to: in the event that the NAK is received or the ACK is not received, causing the first and/or second earpieces to continue retransmitting the PDUs that were not correctly received.

6. The wireless headset of claim 4, wherein the first headset establishes a first CIS connection and a first ACL connection with the third headset and a second CIS connection and a second ACL connection with a fourth headset; or

The second earphone establishes a third CIS connection and a third ACL connection with the third earphone, and establishes a fourth CIS connection and a fourth ACL connection with the fourth earphone;

the first LE Audio communication module and the second LE Audio communication module are each configured to:

switching the first earphone and the second earphone so that the PDU is transmitted on a third CIS connection and a fourth CIS connection with higher signal quality 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 the signal quality of the first ACL connection and the second ACL connection;

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 the signal quality of the third ACL connection and the fourth ACL connection, switching between the first earphone and the second earphone is performed so that the PDU is transmitted over the first CIS connection and the second CIS connection having higher signal quality.

7. The wireless headset of claim 6, wherein the first LE Audio communication module and the second LE Audio communication module are each further configured to:

when the signal quality of the third ACL connection is better than that of the first CIS connection or first ACL connection, or when the signal quality of the second ACL connection is better than that of the fourth CIS connection or fourth ACL connection, switching between the first earphone and the second earphone is carried out, so that the PDU is transmitted 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, switching between the first earphone and the second earphone is performed, so that the PDU is transmitted on the CIS connection having higher signal quality.

8. The wireless headset of claim 6 or 7, wherein the first LE Audio communication module and the second LE Audio communication module are each further configured to: causing the first earpiece to transmit control information to another pair of earpiece earpieces based on the first ACL connection, a second ACL connection, and the second earpiece based on the third ACL connection, a fourth ACL connection.

9. The wireless headset of claim 1, wherein the first classic bluetooth communication module and the second classic bluetooth communication module are each configured to: in the case that one of the first and second headsets correctly receives the first audio data from the smart device, causing the one headset to transmit indication information to the other headset, the indication information indicating that the one headset correctly receives the first audio data from the smart device;

in a case where the other headset correctly receives the first audio data from the smart device and receives the indication information, sending, by the other headset, an ACK to the smart device in a next uplink frame period.

10. The wireless headset of claim 9, wherein the first classic bluetooth communication module and the second classic bluetooth communication module are each configured to: causing one of the first and second headsets to send a NAK or no ACK to the smart device in a next uplink frame period if the first audio data received by the one of the first and second headsets from the smart device is in error; the smart device retransmits the first audio data if the NAK is received or the ACK is not received.

11. The wireless headset of claim 9, wherein the indication information comprises an error correction code; the other headphone, upon receiving the indication information containing the error correction code, correcting an erroneous bit in the received first audio data using the error correction code; and sending ACK to the intelligent equipment in the next uplink frame period when the error bits in the received first audio data are corrected by the error correcting code.

12. An Audio sharing method for wireless headsets, the wireless headsets including at least a first headset and a second headset, wherein the first headset and the second headset both support LE Audio mode, the Audio sharing method comprising:

receiving, by the first headset, first Audio data from a smart device that supports a classic Bluetooth mode instead of an LE Audio mode via a classic Bluetooth connection of the smart device;

obtaining, by the second headset, first audio data from the smart device through listening;

decoding the received first Audio data by the first earphone and the second earphone and coding the decoded first Audio data in an applicable coding mode of an LE Audio mode to obtain second Audio data;

and transmitting the second Audio data to another pair of headphones with the periphery supporting LE Audio mode by the first headphone and the second headphone through LE Audio for Audio sharing.

13. The Audio sharing method according to claim 12, wherein the specific method for Audio sharing by the first and second earphones to another pair of headphones peripherally supporting LE Audio mode includes transmitting PDU by the first and/or second earphones in a CIS connection with the other pair of headphones.

14. The audio sharing method of claim 13, wherein the other pair of headphones comprises a third headphone, a fourth headphone; the third earpiece includes a third LE Audio communication module and the fourth earpiece includes a fourth LE Audio communication module;

the audio sharing method comprises the following steps: in the event that one of the other pair of headphones correctly receives the PDU via one CIS connection, sending an ACK to the first or second headphone via the one CIS connection;

the first and/or second earpieces continue transmitting the next PDU after receiving the ACK without continuing to retransmit PDUs that have been correctly received by the other pair of headphones.

15. The audio sharing method according to claim 14, wherein in case that one of the other pair of the earphones is connected via one CIS and the received PDU is in error, the one of the other pair of the earphones sends NAK or does not send ACK to the first earphone and/or the second earphone via the one CIS connection;

the first and/or second earpieces continue to retransmit PDUs that were not correctly received by the other pair of in-ear headphones if the NAK was received or the ACK was not received.

16. The audio sharing method according to claim 13, wherein the first earphone establishes a first CIS connection and a first ACL connection with the third earphone, and establishes a second CIS connection and a second ACL connection with a fourth earphone; or

17. The audio sharing method according to claim 16, wherein in a case where the signal quality of the third ACL connection is better than that of the first CIS connection or first ACL connection, or in a case where the signal quality of the second ACL connection is better than that of the fourth CIS connection or fourth ACL connection, switching of the first earphone and the second earphone is performed so that transmission of the PDU is performed on a CIS connection having higher signal quality;