WO2022166438A1

WO2022166438A1 - Bluetooth audio data transmission method and device

Info

Publication number: WO2022166438A1
Application number: PCT/CN2021/139595
Authority: WO
Inventors: 俞忠兴
Original assignee: 展讯通信（上海）有限公司
Priority date: 2021-02-03
Filing date: 2021-12-20
Publication date: 2022-08-11
Also published as: CN112994754A; CN112994754B

Abstract

The present invention relates to the technical field of Bluetooth, and in particular to a Bluetooth audio data transmission method and a device. The method comprises: an audio source device broadcasts a first audio data packet to a first audio group, the first audio group comprising a plurality of Bluetooth devices; the audio source device receives a confirmation code sent by at least one Bluetooth device in the first audio group, the confirmation code being used for identifying that the first audio data packet has been successfully received; the audio source device determines, according to the received confirmation code, whether to re-broadcast the first audio data packet in the first audio group. According to embodiments of the present invention, a confirmation code confirmation mechanism is added when an audio data packet is synchronously broadcast, and reliability of data transmission is considered without limiting the number of playing devices.

Description

Bluetooth audio data transmission method and device

This application claims the priority of the Chinese patent application with the application number 202110148241.0 and the application name "Bluetooth audio data transmission method and device", which was submitted to the Chinese Patent Office on February 3, 2021, the entire contents of which are incorporated into this application by reference middle.

technical field

The present invention relates to the field of Bluetooth technology, in particular to a method and device for transmitting Bluetooth audio data.

Background technique

The BLE (Bluetooth Low Energy, Bluetooth Low Energy) 5.2 protocol adds a BLE Audio (Bluetooth audio) solution. BLE Audio supports LTE Isochronous Channels. The LTE synchronization channel defines a time-dependent data transmission channel and transmission strategy to ensure that in a multi-receiver scenario, the data received by the multi-receiver meets the timeliness requirements. That is, based on the LTE synchronization channel, the audio source data can be played synchronously in multiple playback devices. However, when the audio source data is synchronously played in multiple devices, how to take into account the reliability of data transmission without limiting the number of playback devices becomes a problem that needs to be solved.

SUMMARY OF THE INVENTION

In view of this, embodiments of the present invention provide a Bluetooth audio data transmission method and device, which can take into account the reliability of data transmission without limiting the number of playback devices.

In a first aspect, an embodiment of the present invention provides a method for transmitting Bluetooth audio data, the method is applied to an audio source device, and the method includes: broadcasting a first audio data packet to a first audio group, the first audio The group includes a plurality of Bluetooth devices; receive a confirmation code sent by at least one Bluetooth device in the first audio group, where the confirmation code is used to identify the successful reception of the first audio data packet; according to the received confirmation code to determine whether to rebroadcast the first audio data packet in the first audio group.

Optionally, the method further includes: when the first audio group is established, assigning an identification code to each Bluetooth device that joins the first audio group, where the identification code is used to generate the confirmation code.

Optionally, the identification code is used as the confirmation code.

Optionally, the identification code sent to each Bluetooth device is an orthogonal code; the confirmation code from each Bluetooth device is an orthogonal code.

Optionally, the method further includes: broadcasting a first transmit power and a first expected power to the first audio group, where the first transmit power is the power at which the audio source device transmits the first audio data packet , the first expected power is the power expected to receive the confirmation code; the first transmission power and the first expected power are used by each of the Bluetooth devices to calculate the second transmission power for transmitting the confirmation code.

Optionally, receiving the confirmation code sent by at least one Bluetooth device in the first audio group includes: receiving the confirmation code sent by each Bluetooth device at the same receiving opportunity after broadcasting the first audio data packet, and The confirmation code of each Bluetooth device is identified by quadrature demodulation.

Optionally, determining whether to rebroadcast the first audio data packet in the first audio group according to the received confirmation code, including: according to the total number of the Bluetooth devices included in the first audio group , determine the ratio of the number of received confirmation codes to the total number; if the ratio is greater than the first threshold, it is determined not to rebroadcast the first audio data packet in the first audio group; otherwise, The first audio data packet is rebroadcasted in the first audio group.

In a second aspect, an embodiment of the present invention provides a method for transmitting Bluetooth audio data. The method is applied to a Bluetooth device, and the Bluetooth device is included in a first audio group. When the first audio data packet is successfully received, a confirmation code is sent to the audio source device in a predetermined time slot when the first audio data packet is received, and the confirmation code is used to identify the successful reception of the first audio data. Bag.

Optionally, the identification code assigned by the audio source device is obtained when joining the first audio group; the confirmation code sent to the audio source device is generated according to the identification code assigned by the audio source device.

Optionally, sending the confirmation code to the audio source device includes: sending the assigned identification code as the confirmation code to the audio source device.

Optionally, the identification codes of the respective Bluetooth devices included in the first audio group are orthogonal codes; and the confirmation codes from the respective Bluetooth devices are orthogonal codes.

Optionally, the method further includes: receiving a first transmit power and a first expected power broadcast by the audio source device, where the first transmit power is the amount of the first audio data packet transmitted by the audio source device. power, the first expected power is the power expected to receive the confirmation code; sending the confirmation code to the audio source device includes: calculating and transmitting the confirmation code according to the first transmission power and the first expected power The second transmission power of the second transmission power; with the second transmission power, the confirmation code is sent to the audio source device.

In a third aspect, an embodiment of the present invention provides an audio source device, including: at least one processor; and at least one memory communicatively connected to the processor, wherein: the memory stores data that can be executed by the processor program instructions, the processor invokes the program instructions to execute the method of the first aspect or any possible embodiment of the first aspect.

In a fourth aspect, an embodiment of the present invention provides a Bluetooth device, including: at least one processor; and at least one memory communicatively connected to the processor, wherein: the memory stores a program executable by the processor Program instructions, which are invoked by the processor to execute the method of the second aspect or any possible embodiments of the second aspect.

In a fifth aspect, an embodiment of the present invention provides a Bluetooth chip, including: a processor configured to execute computer program instructions stored in a memory, wherein, when the computer program instructions are executed by the processor, trigger the The Bluetooth chip performs the method of any of the above possible embodiments.

In a sixth aspect, an embodiment of the present invention provides a computer-readable storage medium, where the computer-readable storage medium includes a stored program, wherein when the program runs, the device where the computer-readable storage medium is located is controlled to execute the above The method of any possible embodiment.

In the embodiment of the present invention, the audio source device and each Bluetooth device form a first audio group. The audio source device broadcasts the audio data packets to the first audio group in a broadcast manner. Each Bluetooth device in the first audio group monitors the broadcast message and acquires audio data packets according to the monitored broadcast message. Among them, according to the BLE Audio protocol, more devices can join an audio group, so in this way, more Bluetooth devices are supported to obtain the audio data packets broadcast by the audio source device synchronously. Further, each Bluetooth device feeds back a confirmation code to the audio source device after acquiring the audio data packet, and the audio source device decides whether to retransmit the audio data packet according to the received confirmation code, thereby ensuring the reliability of audio data packet transmission. It can be seen that the solutions of the embodiments of the present invention can take into account the reliability of data transmission without limiting the number of playback devices.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present application more clearly, the following briefly introduces the accompanying drawings used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

1 is a schematic structural diagram of a Bluetooth audio system provided by an embodiment of the present invention;

2 is a schematic structural diagram of another Bluetooth audio system provided by an embodiment of the present invention;

3 is a flowchart of a method for transmitting Bluetooth audio data according to an embodiment of the present invention;

4 is a flowchart of another method for transmitting Bluetooth audio data provided by an embodiment of the present invention;

5 is a transmission sequence diagram of a Bluetooth audio data provided by an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of an electronic device provided by an embodiment of the present invention.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

FIG. 1 is a schematic structural diagram of a Bluetooth audio system provided by an embodiment of the present invention. As shown in Figure 1, the system includes an audio source device and a plurality of Bluetooth devices, such as Bluetooth device 1, Bluetooth device 2... Bluetooth device N. Optionally, the audio source device and each Bluetooth device may form a first audio group based on the BLE Audio protocol. The audio source device may broadcast audio data packets to the first audio group. Each Bluetooth device in the first audio group can receive each audio data packet broadcast by the audio source device.

In the above-mentioned first audio group, the audio source device and each Bluetooth device may be mobile phones, tablet computers, wearable devices, in-vehicle devices, building devices, smart home devices, augmented reality (AR)/virtual reality (virtual reality) Reality, VR) devices and other electronic devices, the embodiments of the present application do not impose any restrictions on the specific types of the electronic devices. In a specific example, as shown in FIG. 2 , the audio source device may be a mobile phone. The mobile phone and multiple Bluetooth headsets form a first audio group. For example, the mobile phone and headset 1 to headset 4 form the first audio group. Broadcast audio packets to headset 4. Among them, in order to increase the reliability of data transmission between the audio source device and the Bluetooth device, a feedback confirmation mechanism is added to the data transmission scheme of the embodiment of the present invention, and the specific process is referred to in the subsequent description.

FIG. 3 is a flowchart of a method for transmitting Bluetooth audio data according to an embodiment of the present invention. As shown in FIG. 3 , the execution body of the method may be the audio source device in the system shown in FIG. 1 . The processing steps of the method may include:

101. An audio source device broadcasts a first audio data packet to a first audio group. In some embodiments, the audio source device may need to broadcast a series of audio data packets to the first audio group. The first audio data packet may be any one of a series of audio data packets broadcast by the audio source device. Optionally, the first audio group includes multiple Bluetooth devices, and the multiple Bluetooth devices receive the first audio data packet broadcast by the audio source device. Optionally, after the Bluetooth device in the first audio group determines to receive the first audio data packet broadcast by the audio source device, the Bluetooth device sends a confirmation code to the audio source device.

102. The audio source device receives a confirmation code sent by at least one Bluetooth device in the first audio group. Wherein, the confirmation code is used to identify that the first audio data packet is successfully received.

103. The audio source device determines, according to the received confirmation code, whether to rebroadcast the first audio data packet in the first audio group. Optionally, the audio source device may determine whether to rebroadcast the first audio data packet in the first audio group according to the number of received confirmation codes. The number of confirmation codes represents the number of Bluetooth devices that the first audio group has successfully received the first audio data packet. The audio source device may decide whether to rebroadcast the first audio data packet according to the number of Bluetooth devices that successfully receive the first audio data packet. Optionally, the audio source device may first determine the ratio of the number of confirmation codes to the total number of Bluetooth devices included in the first audio group, and if the ratio is greater than the set value, then there is no need to re-broadcast the first audio data packet; otherwise , the audio source device rebroadcasts the first audio data packet to the first audio source group.

In some embodiments, the audio source device may determine whether the target Bluetooth device successfully receives the first audio data packet according to the received confirmation code. If the target Bluetooth device successfully receives the first audio data packet, the audio source device does not need to restart the Broadcast the first audio data packet. If the target Bluetooth device fails to receive the first audio data packet, the audio source device rebroadcasts the first audio data packet. Optionally, the target Bluetooth device may be a key Bluetooth device set by the user. Of course, in some embodiments, when the audio source device determines, according to the confirmation code, that a Bluetooth device fails to receive the first audio data packet, it rebroadcasts the first audio data packet.

In some embodiments, the acknowledgment codes from the respective Bluetooth devices of the first audio group are orthogonal codes. Optionally, when the audio source device establishes the first audio group, the audio source device may assign an identification code to each Bluetooth device that joins the first audio group, wherein the identification code assigned by the audio source device is used to generate a confirmation code. Optionally, the Bluetooth device can obtain the confirmation code by performing one or more operations such as conversion and encryption on the assigned identification code. Optionally, the identification codes assigned by the audio source device to the respective Bluetooth devices are orthogonal codes, and the confirmation codes generated by the respective Bluetooth devices according to the respective assigned identification codes are also orthogonal codes. In some embodiments, the Bluetooth device uses the assigned identification code as the confirmation code.

In some embodiments, the audio source device broadcasts the first transmit power and the first desired power to the first audio group in addition to broadcasting the first audio data packet to the first audio group. The first transmit power is the power of the audio source device to transmit the first audio data packet. The first expected power is the power expected to receive an acknowledgment code. The first transmit power and the first expected power are used by each Bluetooth device to calculate the second transmit power for transmitting the confirmation code.

Optionally, the above-mentioned first transmit power and first expected power may be carried in the same broadcast message as the first audio data packet, or may be carried in different broadcast messages. For example, the first transmit power and the first desired power are carried in the first broadcast message, and the first audio data packet is carried in the second broadcast message. In some embodiments, the audio source device broadcasts the first transmit power and the first desired power to the first audio group via the first broadcast message. When each Bluetooth device in the first audio group receives each audio data packet broadcast by the audio source device, it calculates the transmission power of each audio data packet according to the above-mentioned first transmission power and the first expected power. For example, the Bluetooth device in the first audio group receives audio data packet 1 , audio data packet 2 . . . audio data packet 5 . The Bluetooth device calculates the transmit power for transmitting confirmation code 1, confirmation code 2...confirmation code 5 according to the first transmit power and the first expected power obtained from the first broadcast message. Among them, confirmation code 1, confirmation code 2...confirmation code 5 are confirmation codes sent to the audio source device after successfully receiving audio data packet 1, audio data packet 2...audio data packet 5 respectively. In the embodiment of the present invention, based on the above expected power measures, the receiving power of each confirmation code received by the audio source device can be basically the same, which is convenient for the audio source device to demodulate the confirmation code.

In the embodiment of the present invention, when the Bluetooth device determines that the first audio data packet is successfully received, it sends an acknowledgement code to the audio source device in a predetermined time slot when the first audio data packet is received. Wherein, because the first audio data packet is sent to each Bluetooth device of the first audio group by broadcasting. Each Bluetooth device receives the first audio data packet at or about the same time. Each Bluetooth device sends the confirmation code to the audio source device in the predetermined time slot, that is, each Bluetooth device sends the confirmation code to the audio source device in the same or about the same time slot. The audio source device receives the confirmation code sent by each Bluetooth device at the same reception timing or about the same reception timing after broadcasting the first audio data packet. Optionally, although each confirmation code received by the audio source device is superimposed in the time domain and the frequency domain, it can demodulate the confirmation code by using an orthogonal demodulation method. Since each confirmation code is an orthogonal code and the received power is basically the same, the audio source device can identify the confirmation code of each Bluetooth device by using the orthogonal characteristic, and then can determine which Bluetooth devices successfully received the first audio data packet and which devices did not. to the first audio data packet, whereby the audio source device can decide whether to rebroadcast the first audio data packet according to the received confirmation code. If it is determined that there is no need to rebroadcast the first audio data packet, the audio source device broadcasts the next audio data packet in the first audio group.

FIG. 4 is a flowchart of another method for transmitting Bluetooth audio data provided by an embodiment of the present invention. As shown in FIG. 4 , the execution body of the method may be a Bluetooth device in the system shown in FIG. 1 , and the Bluetooth device is included in the first audio group. The processing steps of the method may include:

201, the Bluetooth device monitors the broadcast message sent by the audio source device.

202. The Bluetooth device determines that the first audio data packet is successfully acquired from the broadcast message, and sends an acknowledgement code to the audio source device, where the acknowledgement code is used to identify the successful reception of the first audio data packet.

Optionally, the audio source device assigns an identification code to each Bluetooth device that joins the first audio group. The Bluetooth device in step 102 may generate a confirmation code according to the identification code allocated by the audio source device. Optionally, the Bluetooth device may use the identification code assigned by the audio source device as the confirmation code. Wherein, the identification codes of the respective Bluetooth devices included in the first audio group are orthogonal codes; the confirmation codes from the respective Bluetooth devices are orthogonal codes.

During specific implementation, the identification code allocated by the audio source device may be a walsh code of order 64/128/256. In the QPSK (Quadrature Phase Shift Keying) modulation and demodulation mechanism of Bluetooth, the audio source device can use one synbol (symbol) to carry one walsh bit (walsh bit), or multiple symbols to carry one walsh bit, share 64/128/256 symbols to carry 64/128/256 walsh bits. After the Bluetooth device successfully receives the first audio data packet, it can send a confirmation code to the audio source device in a predetermined time slot when the first audio data is received. For example, the Bluetooth device may send the confirmation code 150us after receiving the first audio data packet. Wherein, the confirmation code may also be a walsh code of 64/128/256 order, and its bearing mode is the same as that of the identification code, and will not be repeated here.

Among them, in order to reduce the time deviation between the confirmation codes sent by each Bluetooth device, a longer confirmation code may be used. For example, the following code groups can be used as confirmation codes:

1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1….

1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,-1,-1,-1,-1,-1,-1, -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,….

1,1,1,1,1,1,1,1,-1,-1,-1,-1,-1,-1,-1,-1,1,1,1,1,1, 1,1,1,-1,-1,-1,-1,-1,-1,-1,-1,…

1,1,1,1,1,1,1,1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,- 1,-1,-1,-1,-1,1,1,1,1,1,1,1,1,…

Further, in order to make the received power of each confirmation code basically the same, the embodiment of the present invention adopts a desired power strategy, including: the audio source device broadcasts the first transmit power and the first desired power. The Bluetooth device receives the first transmit power and the first desired power broadcast by the audio source device. Wherein, the first transmission power is the power of the audio source device to transmit the first audio data packet, and the first expected power is the power expected to receive the acknowledgment code. When the Bluetooth device sends the confirmation code to the audio source device, it first calculates the second transmit power for transmitting the confirmation code according to the first transmit power and the first expected power, and then sends the confirmation code to the audio source device with the second transmit power. Based on this, the powers of the confirmation codes of each Bluetooth device received by the audio source device are basically the same, which is convenient for the audio source device to demodulate the confirmation codes.

Optionally, the Bluetooth device calculates the second transmit power (Tx_power_conf) for transmitting the confirmation code according to the first transmit power (Tx_power_broadcast) and the first expected power (Desired_power_cnf), including: when the Bluetooth device receives the first audio data packet, obtain the RSSI. (Received Signal Strength Indication, received signal strength indication). Calculate path loss according to RSSI and Tx_power_broadcast. Calculate Tx_power_conf based on path loss and Desired_power_cnf. in:

Path_loss=RSSI-Tx_power_broadcast;

Tx_power_conf=Desired_power_cnf+Path_loss.

Further, after successfully receiving the first audio data packet, the Bluetooth device can obtain the frequency offset between its own clock and the timestamp of the first audio data packet. When the Bluetooth device sends the confirmation code to the audio source device, it can reversely compensate the frequency offset, so as to keep the orthogonality of the sent confirmation code as much as possible, so as to facilitate the demodulation and identification of the confirmation code by the audio source device.

FIG. 5 is a transmission sequence diagram of Bluetooth audio data according to an embodiment of the present invention. As shown in FIG. 5 , the audio source device broadcasts data packet 1 (Packet1) to the first audio group at the Bluetooth transmission opportunity. The first audio group includes 8 Bluetooth devices. The 8 Bluetooth devices monitor the broadcast message of the audio source device. If the Bluetooth device successfully obtains data packet 1 (Packet1) from the monitored broadcast message, the Bluetooth device feeds back ACK (Acknowledgement, confirmation) information to the audio source device, where ACK The message includes a confirmation code. For example, when Bluetooth device 1 successfully receives Packet1, it feeds back ACK CODE1 to the audio source device; when Bluetooth device 2 successfully receives Packet1, it feeds back ACK CODE2 to the audio source device, and so on. Optionally, CODE1...CODE8 sent by the 8 Bluetooth devices are orthogonal codes. The audio source device uses the orthogonal demodulation method to identify the confirmation codes sent by the 8 Bluetooth devices, and determines that the 8 Bluetooth devices have successfully received Packet1, and then broadcasts data packet 2 (Packet2) to the first audio group at the next Bluetooth transmission opportunity. . Similarly, if the Bluetooth device successfully receives Packet2, it will send a confirmation code to the audio source device. As shown in Figure 5, the confirmation code received by the audio source device lacks ACK CODE4 and ACK CODE6, then the audio source device determines that the corresponding Bluetooth device 4 and Bluetooth device 6 have not successfully received Packet2. As shown in FIG. 5, the audio source device rebroadcasts Packet2 in the first audio group.

According to the solution of the embodiment of the present invention, the audio data packets are broadcast to the Bluetooth devices in the audio group in a broadcast manner, and data can be transmitted to a larger number of Bluetooth devices synchronously. Moreover, when transmitting audio data packets, an acknowledgement mechanism is added to improve the reliability of data transmission. Further, in the confirmation mechanism, the Bluetooth device side only needs to send the confirmation packet, the code changes are small, the impact on power consumption is also small, and the implementation difficulty is low. The demodulation complexity is controlled on the audio source device side, making the solution easy to implement.

FIG. 6 is a schematic structural diagram of an electronic device provided by an embodiment of the present invention. The electronic device shown in FIG. 6 is only an example, and should not impose any limitation on the function and scope of use of the embodiments of the present specification. As shown in Figure 6, the electronic device takes the form of a general-purpose computing device. Components of an electronic device may include, but are not limited to, one or more processors 410 , a communication interface 420 , a memory 430 , a communication bus 440 connecting various system components including memory 430 , communication interface 420 and processor 410 . The above-mentioned communication interface 420 can be connected with other electronic devices or other components, for example, the communication interface 420 can communicate with other Bluetooth devices.

Specifically, in an embodiment of the present application, the processor of the electronic device may be an on-chip device SOC, and the processor may include a central processing unit (Central Processing Unit, CPU), and may further include other types of processors.

Specifically, in an embodiment of the present application, the involved processor may include, for example, a CPU, a DSP, a microcontroller, or a digital signal processor, and may also include a GPU, an embedded Neural-network Process Units (NPU, NPU) ) and an image signal processor (Image Signal Processing, ISP), the processor may also include necessary hardware accelerators or logic processing hardware circuits, such as ASICs, or one or more integrated circuits for controlling the execution of programs in the technical solution of the present application Wait. Furthermore, the processor may have the function of operating one or more software programs, which may be stored in a storage medium.

Communication bus 440 represents one or more of several types of bus structures, including a memory bus or memory controller, a peripheral bus, a graphics acceleration port, a processor, or a local bus using any of a variety of bus structures. For example, these architectures include, but are not limited to, Industry Standard Architecture (hereinafter referred to as: ISA) bus, Micro Channel Architecture (hereinafter referred to as: MAC) bus, enhanced ISA bus, video electronics Standards Association (Video Electronics Standards Association; hereinafter referred to as: VESA) local bus and Peripheral Component Interconnection (Peripheral Component Interconnection; hereinafter referred to as: PCI) bus.

Electronic devices typically include various computer system readable media. These media can be any available media that can be accessed by the electronic device, including both volatile and nonvolatile media, removable and non-removable media.

The memory 430 may include a computer system readable medium in the form of volatile memory, such as random access memory (Random Access Memory; hereinafter referred to as: RAM) and/or cache memory. The electronic device may further include other removable/non-removable, volatile/non-volatile computer system storage media. Optionally, the memory 430 may include a RAM memory, and when the program stored in the RAM memory is called by the processor, the method of the embodiment of the present invention is executed. The electronic device shown in FIG. 6 can be used as an audio source device, and can also be used as a Bluetooth device in the first audio group. When the electronic device shown in FIG. 6 is used as an audio source device, it is used to execute the method performed by the audio source device in the embodiment shown in FIG. related instructions. When the electronic device shown in FIG. 6 is used as the Bluetooth device in the first audio group, it is used to execute the method performed by the Bluetooth device in the embodiment shown in FIG. related descriptions of the examples. For the execution process and technical effect of the technical solution, refer to the descriptions in the embodiments shown in FIG. 2 to FIG. 5 , which will not be repeated here.

An embodiment of the present invention further provides a Bluetooth chip, including: a processor configured to execute computer program instructions stored in a memory, wherein when the computer program instructions are executed by the processor, the Bluetooth chip is triggered to execute The above-mentioned transmission method of Bluetooth audio data. Optionally, the bluetooth chip can be used as the bluetooth chip of the audio source device or the bluetooth chip of the bluetooth device in the first audio group. When the Bluetooth chip is the Bluetooth chip of the audio source device, it is used to execute the method executed by the audio source device in the embodiment shown in FIG. illustrate. When the bluetooth chip is the bluetooth chip of the bluetooth device in the first audio group, it is used to execute the method performed by the bluetooth device in the embodiment shown in FIG. 2 to FIG. description of the example. For the execution process and technical effect of the technical solution, refer to the descriptions in the embodiments shown in FIG. 2 to FIG. 5 , which will not be repeated here.

An embodiment of the present invention provides a computer-readable storage medium, where the computer-readable storage medium stores computer instructions, and the computer instructions cause the computer to execute the audio source device in the embodiments shown in FIG. 2 to FIG. 5 of this specification. The method or the method performed by the Bluetooth device in the embodiments shown in FIG. 2 to FIG. 5 is performed.

The aforementioned computer-readable storage media may employ any combination of one or more computer-readable media. The computer-readable medium may be a computer-readable signal medium or a computer-readable storage medium. The computer-readable storage medium can be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus or device, or a combination of any of the above. More specific examples (non-exhaustive list) of computer readable storage media include: electrical connections with one or more wires, portable computer disks, hard disks, random access memory (RAM), read only memory (Read Only Memory) ; hereinafter referred to as: ROM), Flash memory, erasable programmable read only memory (Erasable Programmable Read Only Memory; hereinafter referred to as: EPROM) or flash memory, optical fiber, portable compact disk read only memory (CD-ROM), optical storage devices , a magnetic memory device, or any suitable combination of the above. In this document, a computer-readable storage medium can be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.

A computer-readable signal medium may include a propagated data signal in baseband or as part of a carrier wave with computer-readable program code embodied thereon. Such propagated data signals may take a variety of forms including, but not limited to, electromagnetic signals, optical signals, or any suitable combination of the foregoing. A computer-readable signal medium can also be any computer-readable medium other than a computer-readable storage medium that can transmit, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device .

Program code embodied on a computer readable medium may be transmitted using any suitable medium including, but not limited to, wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

The foregoing describes specific embodiments of the present specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims can be performed in an order different from that in the embodiments and still achieve desirable results. Additionally, the processes depicted in the figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

In the description of this specification, description with reference to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples", etc., mean specific features described in connection with the embodiment or example , structure, material or feature is included in at least one embodiment or example of this specification. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and combine the different embodiments or examples described in this specification, as well as the features of the different embodiments or examples, without conflicting each other.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In the description of the present specification, "plurality" means at least two, such as two, three, etc., unless otherwise expressly and specifically defined.

Any process or method description in the flowcharts or otherwise described herein may be understood to represent a module, segment or portion of code comprising one or more executable instructions for implementing custom logical functions or steps of the process , and the scope of the preferred embodiments of this specification includes alternative implementations in which the functions may be performed out of the order shown or discussed, including performing the functions substantially concurrently or in the reverse order depending upon the functions involved, which should It is understood by those skilled in the art to which the embodiments of this specification belong.

Depending on the context, the word "if" as used herein can be interpreted as "at" or "when" or "in response to determining" or "in response to detecting." Similarly, the phrases "if determined" or "if detected (the stated condition or event)" can be interpreted as "when determined" or "in response to determining" or "when detected (the stated condition or event)," depending on the context )" or "in response to detection (a stated condition or event)".

In the several embodiments provided in this specification, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined. Either it can be integrated into another system, or some features can be omitted, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

In addition, each functional unit in each embodiment of this specification may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware, or may be implemented in the form of hardware plus software functional units.

The above descriptions are only preferred embodiments of this specification, and are not intended to limit this specification. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this specification shall be included in this specification. within the scope of protection.

Claims

A method for transmitting Bluetooth audio data, wherein the method is applied to an audio source device, and the method includes:

broadcasting a first audio data packet to a first audio group, the first audio group including a plurality of Bluetooth devices;

receiving an acknowledgement code sent by at least one Bluetooth device in the first audio group, where the acknowledgement code is used to identify that the first audio data packet is successfully received;

According to the received confirmation code, it is determined whether to rebroadcast the first audio data packet in the first audio group.
The method according to claim 1, wherein the method further comprises:

When the first audio group is established, an identification code is allocated to each Bluetooth device that joins the first audio group, and the identification code is used to generate the confirmation code.
The method according to claim 2, wherein the identification code is used as the confirmation code.
The method according to claim 2, wherein the identification code sent to each Bluetooth device is an orthogonal code; the confirmation code from each Bluetooth device is an orthogonal code.
The method according to claim 1, wherein the method further comprises:

Broadcasting a first transmit power and a first desired power to the first audio group, where the first transmit power is the power at which the audio source device transmits the first audio data packet, and the first desired power is expected to receive The power of the confirmation code; the first transmit power and the first expected power are used by each of the Bluetooth devices to calculate the second transmit power for transmitting the confirmation code.
The method according to any one of claims 1 to 5, wherein receiving a confirmation code sent by at least one Bluetooth device in the first audio group comprises:

The confirmation code sent by each Bluetooth device is received at the same receiving opportunity after broadcasting the first audio data packet, and the confirmation code of each Bluetooth device is identified by means of orthogonal demodulation.
The method according to claim 1, wherein determining whether to rebroadcast the first audio data packet in the first audio group according to the received confirmation code, comprising:

Determine the ratio of the number of received confirmation codes to the total number according to the total number of the Bluetooth devices included in the first audio group;

If the ratio is greater than a first threshold, it is determined not to rebroadcast the first audio data packet in the first audio group; otherwise, the first audio data packet is rebroadcast in the first audio group.
A method for transmitting Bluetooth audio data, wherein the method is applied to a Bluetooth device, the Bluetooth device is included in a first audio group, and the method includes:

When it is determined that the first audio data packet broadcasted by the audio source device is successfully received, in a predetermined time slot of receiving the first audio data packet, an acknowledgement code is sent to the audio source device, where the acknowledgement code is used to identify successful reception. to the first audio data packet.
The method according to claim 8, wherein the identification code allocated by the audio source device is obtained when joining the first audio group;

The confirmation code sent to the audio source device is generated according to the identification code assigned by the audio source device.
The method according to claim 9, wherein sending a confirmation code to the audio source device comprises:

The assigned identification code is sent to the audio source device as a confirmation code.
The method according to claim 9, wherein the identification codes of each Bluetooth device included in the first audio group are orthogonal codes; and the confirmation codes from the respective Bluetooth devices are orthogonal codes.
The method according to claim 8, wherein the method further comprises: receiving a first transmit power and a first desired power broadcast by the audio source device, the first transmit power being the audio source device the power of transmitting the first audio data packet, the first expected power is the power expected to receive the acknowledgment code;

Send a confirmation code to the audio source device, including:

Calculate the second transmission power for transmitting the confirmation code according to the first transmission power and the first expected power;

Send the confirmation code to the audio source device at the second transmit power.
An audio source device, comprising:

at least one processor; and

at least one memory communicatively coupled to the processor, wherein:

The memory stores program instructions executable by the processor, which are invoked by the processor to perform a method as claimed in any one of claims 1 to 7.
A Bluetooth device, comprising:

at least one processor; and

at least one memory communicatively coupled to the processor, wherein:

The memory stores program instructions executable by the processor, which are invoked by the processor to perform a method as claimed in any one of claims 8 to 12.
A Bluetooth chip, characterized in that it includes:

A processor for executing computer program instructions stored in a memory, wherein, when the computer program instructions are executed by the processor, the Bluetooth chip is triggered to perform any one of claims 1 to 7 or 8 to 12. method described.
A computer-readable storage medium, characterized in that the computer-readable storage medium comprises a stored program, wherein when the program is run, a device where the computer-readable storage medium is located is controlled to execute claims 1 to 7 or 8 The method of any one of to 12.