CN110830970B - Audio transmission method, device, equipment and storage medium between Bluetooth equipment - Google Patents

Abstract

The embodiment of the present application discloses an audio transmission method, device, device and storage medium between Bluetooth devices, belonging to the technical field of Bluetooth. The method: the first bluetooth device establishes m bluetooth connections with the second bluetooth device through m bluetooth chips in the n bluetooth chips, the second bluetooth device is provided with at least m bluetooth chips, m is greater than or equal to 2, and m is less than or equal to n; receive an audio playback instruction, the audio playback instruction is used to instruct to play the audio in the first Bluetooth device through the second Bluetooth device; according to the audio playback instruction, send audio data to the second Bluetooth device through m Bluetooth connections, wherein , different Bluetooth connections are used to send audio data for the same audio. In the embodiment of the present application, the transmission bandwidth between Bluetooth devices has been improved, thereby realizing high-quality audio playback and improving the playback sound quality of Bluetooth audio.

Description

Audio transmission method, device, equipment and storage medium between bluetooth devices

technical field

The embodiments of the present application relate to the technical field of Bluetooth, and in particular to an audio transmission method, device, device and storage medium between Bluetooth devices.

Background technique

As a short-range wireless communication technology, Bluetooth (Bluetooth) is widely used in electronic devices such as mobile terminals, earphones, and speakers because of its low power consumption and low cost.

In related technologies, for mobile terminals and speakers equipped with Bluetooth chips, when a Bluetooth connection is established between the mobile terminal and the speakers, the mobile terminal can send audio data to the speakers through the Bluetooth connection, and the speakers will analyze and play the audio data after receiving the audio data, thereby getting rid of the The shackles of the connecting wire between the mobile terminal and the speaker. However, limited by the Bluetooth audio transmission protocol, the maximum transmission bandwidth between Bluetooth devices is limited to 1M/s, resulting in poor playback sound quality of Bluetooth audio.

Contents of the invention

Embodiments of the present application provide an audio transmission method, device, device, and storage medium between Bluetooth devices. Described technical scheme is as follows:

On the one hand, an audio transmission method between Bluetooth devices is provided, the method is used for a first Bluetooth device, and n Bluetooth chips are set in the first Bluetooth device, and n is greater than or equal to 2, and the method includes:

Establish m bluetooth connections with the second bluetooth device through the m bluetooth chips in the n bluetooth chips, the second bluetooth device is provided with at least m bluetooth chips, m is greater than or equal to 2, and m is less than or equal to n ;

Receiving an audio play instruction, the audio play instruction is used to instruct to play the audio in the first Bluetooth device through the second Bluetooth device;

According to the audio playing instruction, audio data is sent to the second Bluetooth device through the m Bluetooth connections, wherein different Bluetooth connections are used to send audio data of the same audio.

In another aspect, a method for audio transmission between Bluetooth devices is provided, the method is used for a second Bluetooth device, and at least two Bluetooth chips are arranged in the second Bluetooth device, and the method includes:

Establish m bluetooth connections with the first bluetooth device through m bluetooth chips in the at least two bluetooth chips, where n bluetooth chips are set in the first bluetooth device, m is greater than or equal to 2, and m is less than or equal to n ;

Receive audio data sent by the first Bluetooth device through the m Bluetooth connections, wherein different Bluetooth connections are used to send audio data of the same audio;

Play audio according to the audio data.

In another aspect, an audio transmission device between Bluetooth devices is provided, the device is used for a first Bluetooth device, and n Bluetooth chips are arranged in the first Bluetooth device, n is greater than or equal to 2, and the device includes:

The first connection module is configured to establish m bluetooth connections with the second bluetooth device through m bluetooth chips in the n bluetooth chips, the second bluetooth device is provided with at least m bluetooth chips, and m is greater than or equal to 2, and m is less than or equal to n;

An instruction receiving module, configured to receive an audio playing instruction, and the audio playing instruction is used to instruct to play the audio in the first Bluetooth device through the second Bluetooth device;

The data sending module is configured to send audio data to the second Bluetooth device through the m Bluetooth connections according to the audio playback instruction, wherein different Bluetooth connections are used to send audio data of the same audio.

In another aspect, an audio transmission device between Bluetooth devices is provided, the device is used for a second Bluetooth device, and at least two Bluetooth chips are arranged in the second Bluetooth device, and the device includes:

The second connection module is used to establish m bluetooth connections with the first bluetooth device through the m bluetooth chips of the at least two bluetooth chips, the first bluetooth device is provided with n bluetooth chips, and m is greater than or equal to 2, and m is less than or equal to n;

A data receiving module, configured to receive the audio data sent by the first Bluetooth device through the m Bluetooth connections, wherein different Bluetooth connections are used to send audio data of the same audio;

The playing module is used for playing audio according to the audio data.

In another aspect, a bluetooth device is provided, the bluetooth device includes a processor, a memory and at least two bluetooth chips; the memory stores at least one instruction, and the at least one instruction is used to be executed by the processor to Realize the audio transmission method between Bluetooth devices as described in the above aspects.

In another aspect, a computer-readable storage medium is provided, the storage medium stores at least one instruction, and the at least one instruction is used to be executed by a processor to implement the audio transmission method between Bluetooth devices as described in the above aspect .

In another aspect, a computer program product is also provided, the computer program product stores at least one instruction, and the at least one instruction is loaded and executed by a processor to implement the audio transmission method between Bluetooth devices as described in the above aspect.

In the embodiment of the present application, at least two Bluetooth chips are set in the Bluetooth device, and at least two Bluetooth connections are established between the Bluetooth devices through the at least two Bluetooth chips, so that during audio transmission, at least two Bluetooth connections Perform audio data transmission; compared with related technologies, the transmission bandwidth between Bluetooth devices in the embodiment of the present application has been improved, thereby enabling high-quality audio playback and improving the playback sound quality of Bluetooth audio.

Description of drawings

Fig. 1 shows the structural block diagram of the bluetooth device that an exemplary embodiment of the present application provides;

FIG. 2 shows a schematic diagram of an implementation environment provided by an exemplary embodiment of the present application;

FIG. 3 shows another exemplary embodiment of the present application providing a schematic diagram of an implementation environment;

FIG. 4 shows a flowchart of an audio transmission method between Bluetooth devices shown in an exemplary embodiment of the present application;

FIG. 5 shows a flowchart of an audio transmission method between Bluetooth devices shown in another exemplary embodiment of the present application;

Fig. 6 is a flowchart of the first bluetooth device establishing a slave bluetooth connection process;

Fig. 7 is a flow chart of the second bluetooth device establishing a slave bluetooth connection process;

Fig. 8 is a schematic diagram of a bluetooth protocol stack provided by an exemplary embodiment;

FIG. 9 shows a structural block diagram of an audio transmission device between Bluetooth devices provided by an embodiment of the present application;

Fig. 10 shows a structural block diagram of an audio transmission device between Bluetooth devices provided by another embodiment of the present application.

Detailed ways

In order to make the purpose, technical solution and advantages of the present application clearer, the implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

The "plurality" mentioned herein means two or more. "And/or" describes the association relationship of associated objects, indicating that there may be three types of relationships, for example, A and/or B may indicate: A exists alone, A and B exist simultaneously, and B exists independently. The character "/" generally indicates that the contextual objects are an "or" relationship.

Please refer to FIG. 1 , which shows a structural block diagram of a Bluetooth device 100 provided by an exemplary embodiment of the present application. The Bluetooth device 100 may be a smart phone, a tablet computer, a notebook computer, a Bluetooth speaker, a Bluetooth headset, and the like. The Bluetooth device 100 in this application may include one or more of the following components: a processor 110 , a memory 120 and at least two Bluetooth chips 130 .

Processor 110 may include one or more processing cores. The processor 110 uses various interfaces and lines to connect various parts in the entire Bluetooth device 100, and executes or executes instructions, programs, code sets or instruction sets stored in the memory 120, and calls data stored in the memory 120 to execute Various functions and processing data of the Bluetooth device 100. Optionally, the processor 110 may use at least one of Digital Signal Processing (Digital Signal Processing, DSP), Field-Programmable Gate Array (Field-Programmable Gate Array, FPGA), and Programmable Logic Array (ProgrammableLogic Array, PLA). implemented in the form of hardware. The processor 110 may integrate one or more of a central processing unit (Central Processing Unit, CPU), an image processor (Graphics Processing Unit, GPU), a neural network processor (Neural-network Processing Unit, NPU) and a modem, etc. combination. Among them, the CPU mainly processes the operating system, user interface and application programs, etc.; the GPU is used to render and draw images; the NPU is used to implement artificial intelligence (AI) functions; the modem is used to process wireless communication. It can be understood that, the above-mentioned modem may not be integrated into the processor 110, but implemented by a single chip.

The memory 120 may include a random access memory (Random Access Memory, RAM), and may also include a read-only memory (Read-Only Memory, ROM). Optionally, the memory 120 includes a non-transitory computer-readable storage medium. The memory 120 may be used to store instructions, programs, codes, sets of codes, or sets of instructions. The memory 120 may include a program storage area and a data storage area, wherein the program storage area may store instructions for implementing an operating system, instructions for at least one function (such as a touch function, a sound playback function, an image playback function, etc.), Instructions and the like for implementing the following method embodiments; the storage data area can store data created according to the use of the Bluetooth device 100 (such as audio data, phonebook) and the like.

The Bluetooth chip 130 is a chip for performing Bluetooth communication. The Bluetooth device 100 in the embodiment of the present application is provided with at least two Bluetooth chips 130, wherein different Bluetooth chips 130 correspond to different Bluetooth Media Access Control (MAC) addresses. Optionally, each Bluetooth chip 130 follows the same Bluetooth protocol, such as Bluetooth 4.0 protocol, Bluetooth 5.0 protocol, etc., which is not limited in this application.

In a possible implementation manner, at least two Bluetooth chips 130 include a master Bluetooth chip and at least one slave Bluetooth chip, wherein the master Bluetooth chip implements the main Bluetooth functions of the Bluetooth device 100, including Bluetooth data transmission and Bluetooth audio playback. , Bluetooth positioning, etc., provide additional Bluetooth audio playback functions from the Bluetooth chip. Optionally, each Bluetooth chip 130 can work independently, or multiple Bluetooth chips 130 can work simultaneously.

In addition, those skilled in the art can understand that the structure of the bluetooth device 100 shown in the above drawings does not constitute a limitation on the bluetooth device 100, and the bluetooth device 100 may include more or less components than shown in the figure, Or combine certain components, or different component arrangements. For example, when the Bluetooth device 100 is a smart phone, the Bluetooth device 100 also includes a display screen, a radio frequency circuit, a wireless fidelity (Wireless Fidelity, WiFi) module, a sensor, a power supply, etc.; when the Bluetooth device 100 is a Bluetooth speaker, the Bluetooth device 100 also includes an audio circuit, a loudspeaker, a power supply, etc., which will not be repeated in this embodiment of the present application.

Please refer to FIG. 2 , which shows a schematic diagram of an implementation environment provided by an exemplary embodiment of the present application, and the implementation environment includes a first Bluetooth device 210 and a second Bluetooth device 220 .

Both the first Bluetooth device 210 and the second Bluetooth device 220 are provided with at least two Bluetooth chips. In FIG. 2 , the first Bluetooth device 210 is a smart phone provided with two Bluetooth chips, and the second Bluetooth device 220 is a smart speaker provided with two Bluetooth chips as an example for illustration.

In a possible application scenario, when the audio in the first Bluetooth device 210 needs to be played through the second Bluetooth device 220, two Bluetooth connections are established between the first Bluetooth device 210 and the second Bluetooth device 220, and respectively The audio data is sent to the second Bluetooth device 220 through two Bluetooth connections, and the second Bluetooth device 220 performs audio playback according to the received audio data.

Compared with related technologies, Bluetooth devices can only transmit audio data through a single Bluetooth chip. In the embodiment of the present application, by setting multiple Bluetooth chips, a single Bluetooth device can establish multiple Bluetooth connections, thereby increasing the number of Bluetooth devices. Transmission bandwidth between devices. For example, when the transmission bandwidth of a single Bluetooth chip is 1M/s, if two Bluetooth chips are installed in the Bluetooth device, the transmission bandwidth of the Bluetooth device can be increased to 2M/s, so that the Bluetooth device can play high-quality video through the Bluetooth connection. Lossless audio (code rate above 1.4M/s).

Of course, in addition to establishing at least two Bluetooth connections with the same Bluetooth device, in other possible application scenarios, the first Bluetooth device with at least two Bluetooth chips can also communicate with multiple traditional Bluetooth devices (with one Bluetooth chip) at the same time. ) to establish a Bluetooth connection, thereby separately controlling multiple traditional Bluetooth devices to play Bluetooth audio. Schematically, as shown in FIG. 3 , the first Bluetooth device 210 can respectively establish a Bluetooth connection with the Bluetooth headset 230 and the traditional Bluetooth speaker 240 (both provided with a Bluetooth chip), thereby controlling the Bluetooth headset 230 and the traditional Bluetooth speaker 240 to play the same or different audio.

In addition, in the embodiment of the present application, in addition to transmitting audio through multiple Bluetooth chips, in other possible implementations, data transmission between Bluetooth devices can also be performed through multiple Bluetooth chips, thereby increasing the rate of data transmission. Examples are not limited to this.

Please refer to FIG. 4 , which shows a flowchart of an audio transmission method between Bluetooth devices according to an exemplary embodiment of the present application. This embodiment is described by taking the method applied to the implementation environment shown in FIG. 2 as an example. The method includes:

Step 401, the first bluetooth device establishes m bluetooth connections with the second bluetooth device through m bluetooth chips among the n bluetooth chips, the second bluetooth device is provided with at least m bluetooth chips, m is greater than or equal to 2, and m less than or equal to n.

In a possible implementation manner, after the first Bluetooth device turns on the Bluetooth function, at least one Bluetooth chip in the n Bluetooth chips performs Bluetooth scanning, and displays at least one scanned Bluetooth device in the Bluetooth scanning interface. The at least one bluetooth device includes the second bluetooth device. When receiving the selection operation of the second bluetooth device, the first bluetooth device establishes at least two bluetooth connections with the second bluetooth device through at least two bluetooth chips.

In a schematic example, the first Bluetooth device is provided with 2 Bluetooth chips, and the second Bluetooth device is provided with 2 Bluetooth chips, the first Bluetooth device can establish 2 Bluetooth connections with the second Bluetooth device.

In another illustrative example, the first Bluetooth device is provided with 3 Bluetooth chips, and the second Bluetooth device is provided with 2 Bluetooth chips, the first Bluetooth device can establish 2 Bluetooth connections with the second Bluetooth device .

In step 402, the second Bluetooth device establishes m Bluetooth connections with the first Bluetooth device through m Bluetooth chips among the at least two Bluetooth chips.

Correspondingly, the second Bluetooth device establishes m Bluetooth connections with the first Bluetooth device.

Step 403, the first bluetooth device receives an audio play instruction, and the audio play instruction is used to instruct the second bluetooth device to play the audio in the first bluetooth device.

In the embodiment of this application, the second Bluetooth device is a Bluetooth device with audio playback function. For example, the second Bluetooth device is a Bluetooth speaker or a Bluetooth headset. After establishing a Bluetooth connection with the second Bluetooth device, the first Bluetooth device can pass through the second Bluetooth device. Bluetooth device playback for audio playback.

Optionally, the audio playback instruction is manually triggered by the user, for example, when the playback operation of the audio and video files in the first Bluetooth device is received, it is determined that the audio playback instruction is received; or, the audio playback instruction can also be established when the Bluetooth connection is established. Afterwards, it is automatically triggered. For example, when a Bluetooth device is established with the second Bluetooth device, the first Bluetooth device will play all the local audio through the second Bluetooth device, such as game audio, button sounds, prompt sounds, etc. This embodiment does not make any adjustments to this. limited.

Step 404, the first Bluetooth device sends audio data to the second Bluetooth device through m Bluetooth connections according to the audio playback instruction, wherein different Bluetooth connections are used to send audio data of the same audio.

Further, the first Bluetooth device sends audio data (audio data stream) to the second Bluetooth device through m Bluetooth connections. Compared with the audio data transmission through a single Bluetooth connection in the related art, the transmission rate of audio data through m Bluetooth connections can reach m times the original transmission rate, thereby increasing the transmission rate while ensuring the transmission delay, and achieving a higher Transmission playback of high-quality audio.

Optionally, before the first Bluetooth device sends the audio data, the audio processing chip divides the audio data into m channels of audio data, and then transmits the m channels of audio data.

In a possible implementation, different Bluetooth connections are used to transmit different audio data of the same audio, for example, different Bluetooth connections are used to transmit audio data of different channels, or different Bluetooth connections are used to transmit the same audio of the same audio Data, for example, different Bluetooth connections are used to transmit audio data for the left and right channels.

Step 405, the second Bluetooth device receives the audio data sent by the first Bluetooth device through m Bluetooth connections.

Correspondingly, the second Bluetooth device receives audio data through the m Bluetooth connections. Optionally, the second Bluetooth device sends the received audio data to the audio processing chip, so that the audio processing chip can analyze and play the received audio data.

Step 406, the second bluetooth device performs audio playback according to the audio data.

In the embodiment of the present application, the second Bluetooth device has an audio playback component, such as a speaker, and after analyzing the audio data, the second Bluetooth device performs audio playback through the audio playback component.

To sum up, in the embodiment of the present application, at least two Bluetooth chips are set in the Bluetooth device, and at least two Bluetooth connections are established between the Bluetooth devices through the at least two Bluetooth chips, so that during audio transmission, through At least two Bluetooth connections are used for audio data transmission; compared with related technologies, the transmission bandwidth between Bluetooth devices in the embodiment of the present application is improved, thereby enabling high-quality audio playback and improving the playback sound quality of Bluetooth audio.

In a possible implementation manner, the bluetooth chip in the first bluetooth device (or the second bluetooth device) includes a master bluetooth chip and a slave bluetooth chip. The two Bluetooth devices establish a master Bluetooth connection, and then establish a slave Bluetooth connection with the second Bluetooth device based on the established master Bluetooth connection. The following uses a schematic embodiment to illustrate.

Please refer to FIG. 5 , which shows a flowchart of an audio transmission method between Bluetooth devices according to another exemplary embodiment of the present application. This embodiment is described by taking the method applied to the implementation environment shown in FIG. 2 as an example. The method includes:

In step 501, the first Bluetooth device establishes a master Bluetooth connection with the second master Bluetooth chip in the second Bluetooth device through the first master Bluetooth chip among the n Bluetooth chips.

In a possible implementation manner, for a Bluetooth device provided with at least two Bluetooth chips, when the Bluetooth function is turned on, the Bluetooth device starts the main Bluetooth chip in the Bluetooth chips, and searches for other Bluetooth devices attached to it through the main Bluetooth chip. Wherein, at least two bluetooth chips include a master bluetooth chip, and the remaining n-1 bluetooth chips are all slave bluetooth chips.

In a possible implementation manner, when the first bluetooth device turns on the bluetooth function, it performs bluetooth scanning through the first main bluetooth chip, and when the second bluetooth device turns on the bluetooth function, it carries out bluetooth scanning through the second main bluetooth chip. When the second bluetooth device is scanned by the first main bluetooth chip, the first bluetooth device will display the second bluetooth device on the bluetooth scanning interface, and when receiving the selection operation of the second bluetooth device, communicate with the second bluetooth device The second main bluetooth chip establishes the main bluetooth connection. Wherein, the process of establishing the main Bluetooth connection between the main Bluetooth chips is similar to the traditional way of establishing the Bluetooth connection, and will not be repeated in this embodiment.

Optionally, after the first bluetooth device and the second bluetooth device establish a main bluetooth connection for the first time, both the first bluetooth device and the second bluetooth device record the peer bluetooth device, and when the peer bluetooth device is scanned again later, they can directly establish Main bluetooth connection.

Step 502, the second Bluetooth device establishes a master Bluetooth connection with the first master Bluetooth chip in the first Bluetooth device through the second master Bluetooth chip among the m Bluetooth chips.

Correspondingly, the second Bluetooth device establishes a master Bluetooth connection with the first Bluetooth device through the second master Bluetooth chip.

Step 503, the first Bluetooth device establishes m-1 slave Bluetooth connections with the second Bluetooth device through the master Bluetooth connection.

After the main Bluetooth connection is established, the first Bluetooth device can perform data communication with the second Bluetooth device. For a Bluetooth device with multiple Bluetooth chips, if the user needs to manually establish multiple Bluetooth connections between the Bluetooth devices, it will take a lot of time and easily cause connection establishment errors. Therefore, in the embodiment of the present application, the first Bluetooth device and The second bluetooth device establishes a slave bluetooth connection between the slave bluetooth chips through the established master bluetooth connection.

In a possible implementation manner, in order to determine whether the peer Bluetooth device that establishes the master Bluetooth connection has at least two Bluetooth chips, that is, to determine whether a slave Bluetooth connection can be established with the peer Bluetooth device, the first Bluetooth device and the second Bluetooth The devices exchange information through the master Bluetooth connection, and further establish a slave Bluetooth connection when it is determined that the peer Bluetooth device has at least two Bluetooth chips.

Optionally, as shown in FIG. 6, this step may include the following steps.

Step 503A, the first Bluetooth device exchanges Bluetooth information with the second Bluetooth device through the main Bluetooth connection, and the Bluetooth information includes at least the number of Bluetooth chips in the Bluetooth device.

In a possible implementation manner, after the main Bluetooth connection is established, the second Bluetooth device sends the second Bluetooth information to the first Bluetooth device through the main Bluetooth connection, and the second Bluetooth information includes the Bluetooth chip in the second Bluetooth device. quantity. Optionally, the number of bluetooth chips is the number of available bluetooth chips, that is, bluetooth chips that have established bluetooth connections are excluded.

Further, if the number of Bluetooth chips in the second Bluetooth device is greater than or equal to 2, it is determined that the second Bluetooth device supports the establishment of multiple Bluetooth connections, thereby performing step 503B; if the number of Bluetooth chips in the second Bluetooth device is less than 2, then determine The second Bluetooth device does not support establishment of multiple Bluetooth connections, so only a primary Bluetooth connection is established with the second Bluetooth device.

It should be noted that, for a Bluetooth device equipped with a single Bluetooth chip, the number of the local Bluetooth chip will not be sent to the opposite end after the Bluetooth connection is established. Correspondingly, if the Bluetooth information sent by the second Bluetooth device is not received, the second A Bluetooth device determines that the second Bluetooth device does not support establishing multiple Bluetooth connections.

Step 503B, if the number of bluetooth chips in the second bluetooth device is at least two, the first bluetooth device activates the first slave bluetooth chip in the first bluetooth device.

Optionally, for consideration of power consumption, after the Bluetooth device with at least two Bluetooth chips starts the Bluetooth function, only the main Bluetooth chip is started. Therefore, when it is determined that multiple Bluetooth connections can be established with the second Bluetooth device, The first bluetooth device needs to activate the first slave bluetooth chip so as to subsequently establish a slave bluetooth connection. Wherein, the quantity of the first slave bluetooth chip is at least one.

First, after starting from the Bluetooth chip, it can broadcast Bluetooth so that it can be discovered by other Bluetooth devices.

Step 503C, the first bluetooth device establishes a slave bluetooth connection with the second slave bluetooth chip in the second bluetooth device through the first slave bluetooth chip.

In a possible implementation manner, after the first Bluetooth device determines that the second Bluetooth device includes at least two Bluetooth chips, it further obtains the Bluetooth information of each slave Bluetooth chip in the second Bluetooth device through the master Bluetooth connection, so that according to the Bluetooth information, Control the slave Bluetooth chip of the local end to establish a slave Bluetooth connection with each slave Bluetooth chip of the opposite end.

Optionally, this step includes the following steps.

1. Obtain the Bluetooth MAC address of the second slave Bluetooth chip through the master Bluetooth connection.

In a possible implementation manner, after the second Bluetooth device determines that the first Bluetooth device includes multiple Bluetooth chips, it sends the Bluetooth MAC address of the second slave Bluetooth chip to the first Bluetooth device through the master Bluetooth connection, so that the first Bluetooth The device establishes a slave Bluetooth connection with the second Bluetooth device according to the Bluetooth MAC address. Correspondingly, the first Bluetooth device obtains the Bluetooth MAC address through the main Bluetooth connection.

In the embodiment of the present application, different Bluetooth chips in the Bluetooth device have different Bluetooth MAC addresses, and the Bluetooth MAC addresses are unique, so different Bluetooth chips can be distinguished according to the Bluetooth MAC addresses, thereby establishing a slave Bluetooth connection.

2. Establish a slave Bluetooth connection through the first slave Bluetooth chip and the second slave Bluetooth chip according to the Bluetooth MAC address.

Further, the first Bluetooth device establishes a slave Bluetooth connection with the second slave Bluetooth device indicated by the Bluetooth MAC address through the first slave Bluetooth chip.

In a possible implementation manner, the first Bluetooth device matches the obtained Bluetooth MAC address with each scanned Bluetooth device, so as to establish a Bluetooth connection with the matched Bluetooth device (ie, the second slave Bluetooth chip).

Optionally, when it is necessary to establish a slave Bluetooth connection between at least two first slave Bluetooth chips and at least two second slave Bluetooth chips, the first Bluetooth device connects the first slave Bluetooth chip and the second slave Bluetooth chip one by one. Matching, so as to establish a slave Bluetooth connection between the matching first slave Bluetooth chip and the second slave Bluetooth chip, avoiding the establishment of multiple Bluetooth connections with the same slave Bluetooth chip.

Step 504, the second Bluetooth device establishes m-1 slave Bluetooth connections with the first Bluetooth device through the master Bluetooth connection.

Corresponding to the above step 503, when the second Bluetooth device recognizes that the first Bluetooth device is equipped with at least two Bluetooth chips, it establishes a slave Bluetooth connection with it. In a possible implementation manner, as shown in FIG. 7 , this step includes the following steps.

Step 504A, perform Bluetooth information interaction with the first Bluetooth device through the main Bluetooth connection, and the Bluetooth information includes at least the number of Bluetooth chips in the Bluetooth device.

In a possible implementation manner, after the main Bluetooth connection is established, the first Bluetooth device sends the first Bluetooth information to the second Bluetooth device through the main Bluetooth connection, and the first Bluetooth information includes the Bluetooth chip in the first Bluetooth device. quantity. Optionally, the number of bluetooth chips is the number of available bluetooth chips, that is, bluetooth chips that have established bluetooth connections are excluded.

Further, if the number of Bluetooth chips in the first Bluetooth device is greater than or equal to 2, it is determined that the first Bluetooth device supports the establishment of multiple Bluetooth connections, thereby performing step 504B; if the number of Bluetooth chips in the first Bluetooth device is less than 2, then determine The first Bluetooth device does not support establishment of multiple Bluetooth connections, so only a primary Bluetooth connection is established with the first Bluetooth device.

It should be noted that, for a Bluetooth device equipped with a single Bluetooth chip, the number of the local Bluetooth chip will not be sent to the opposite end after the Bluetooth connection is established. Correspondingly, if the Bluetooth information sent by the first Bluetooth device is not received, the second The second Bluetooth device determines that the first Bluetooth device does not support establishing multiple Bluetooth connections.

Step 504B, if the number of bluetooth chips in the first bluetooth device is at least two, start the second slave bluetooth chip in the second bluetooth device.

Optionally, when it is determined that multiple bluetooth connections can be established with the first bluetooth device, the second bluetooth device needs to activate the second slave bluetooth chip so as to subsequently establish a slave bluetooth connection. Wherein, the number of the second slave bluetooth chip is at least one.

Second, after starting from the bluetooth chip, it can broadcast bluetooth so that it can be discovered by other bluetooth devices.

Step 504C, establish a slave Bluetooth connection with the first slave Bluetooth chip in the first Bluetooth device through the second slave Bluetooth chip.

In a possible implementation manner, after the second bluetooth device determines that the first bluetooth device includes at least two bluetooth chips, it further sends the bluetooth information of the second slave bluetooth chip through the master bluetooth connection item, so that the first bluetooth According to the Bluetooth information, the device controls the first slave Bluetooth chip to establish a slave Bluetooth connection with the second slave Bluetooth chip.

Optionally, the second Bluetooth device sends the Bluetooth MAC address of the second slave Bluetooth chip to the first Bluetooth device through the master Bluetooth connection.

It should be noted that the second Bluetooth device can also obtain the Bluetooth MAC address of the first slave Bluetooth chip in the first Bluetooth device through the master Bluetooth connection, so that when the slave Bluetooth connection is established, authentication is performed according to the Bluetooth MAC address. I won't repeat them here.

Step 505, the first bluetooth device receives an audio play instruction, and the audio play instruction is used to instruct the second bluetooth device to play the audio in the first bluetooth device.

For the implementation manner of this step, reference may be made to the foregoing step 403 , and details will not be described here in this embodiment.

In step 506, the first Bluetooth device determines the audio code rate of the target audio indicated by the audio playback instruction.

When the sound quality of the target audio to be played is poor (for example, the audio bit rate is lower than 1M/s), the rate of audio data transmission through a single Bluetooth connection can reach the audio bit rate of the target audio, and there is no need to pass multiple Bluetooth connections. Audio data transfer. Therefore, in a possible implementation manner, before the first Bluetooth device sends Bluetooth data, the audio code rate of the target audio, if the audio code rate is higher than the code rate threshold, then perform step 507, if the audio code rate is lower than the code rate threshold, audio data transfers are only made over the main Bluetooth connection.

Wherein, the code rate threshold may be the transmission bandwidth of a single Bluetooth connection, for example, the code rate threshold is 1M/S.

Step 507, if the audio code rate is higher than the code rate threshold, the first Bluetooth device sends audio data to the second Bluetooth device through m Bluetooth connections.

When the audio code rate is higher than the code rate threshold, the first Bluetooth device sends audio data to the second Bluetooth device through m Bluetooth connections, thereby increasing the transmission rate and bandwidth of the audio data.

In a possible implementation manner, when the target audio is multi-channel audio, the first Bluetooth device processes the audio data based on the channel before transmitting the audio data, so as to output the processed audio through m Bluetooth connections Send to a second Bluetooth device. Optionally, this step includes the following steps.

1. Generate m channels of audio data according to the target audio, where each channel of audio data corresponds to its own audio channel.

Optionally, the first Bluetooth device uses an audio processing component to divide the target audio into m channels of audio data according to audio channels. For example, when the target audio is two-channel audio, the first Bluetooth device divides the target audio into left-channel audio data and right-channel audio data. Of course, when the target audio is 2.1-channel, 3.1-channel or 5.1-channel audio, the first Bluetooth device may divide the target audio into m channels of audio data, which is not limited in this embodiment.

2. Send m channels of audio data to the second Bluetooth device through m Bluetooth connections, and the m channels of audio data are time-synchronized.

Unlike in related technologies, audio data is sent through the same Bluetooth connection (that is, single-channel transmission), and there is no problem of multi-channel audio synchronization during audio playback. In the embodiment of the present application, in order to ensure that the second Bluetooth device plays audio more When the first Bluetooth device sends m channels of audio data, it needs to synchronize the time of m channels of audio data, that is, multiple channels of audio data at the same time in the target audio are sent at the same time.

In a possible implementation manner, the first Bluetooth device may set an audio time stamp for each channel of audio data, so as to implement audio synchronization.

Step 508, the second Bluetooth device receives the audio data sent by the first Bluetooth device through m Bluetooth connections.

Correspondingly, the second Bluetooth device receives m channels of audio data sent by the first Bluetooth device through m Bluetooth connections.

Step 509, perform audio playback according to the audio data.

Since there may be differences in the transmission rates of different Bluetooth connections, in order to ensure the synchronization of multi-channel audio playback, when audio playback is performed according to m-channel audio data, the second Bluetooth device synchronizes through the audio channels corresponding to the m-channel audio data Audio playback, wherein the second bluetooth device can perform audio synchronization according to the audio time stamps of each channel of audio data.

In this embodiment, the Bluetooth devices first establish a master Bluetooth connection through the master Bluetooth chip, thereby performing information exchange based on the master Bluetooth connection, and then establish a slave Bluetooth connection between the slave Bluetooth chips, without the need for the user to manually establish multiple Bluetooth connections one by one, which simplifies The process of establishing a Bluetooth connection of a Bluetooth device with multiple Bluetooth chips.

In addition, in this embodiment, when the Bluetooth device transmits and plays multiple channels of audio data, time synchronization is performed on the multiple channels of audio data, so as to avoid the problem of out-of-sync audio playback and improve the quality of audio playback.

When realizing the audio transmission method provided by the above-mentioned embodiments, in addition to improving the hardware (that is, adding a Bluetooth chip) level, it is also necessary to improve the software level.

In a possible implementation manner, on the basis of the existing Bluetooth protocol stack in the system, an additional Bluetooth protocol stack needs to be implemented separately, and the newly added Bluetooth chip has been controlled and managed through the Bluetooth protocol stack. As shown in Figure 8, the system of the Bluetooth device 810 includes a master Bluetooth protocol stack 811 and a slave Bluetooth protocol stack 812, the master Bluetooth protocol stack 811 is used to manage the master Bluetooth chip 813, and the slave Bluetooth protocol stack 812 is used to manage the slave Bluetooth chip 814 . Moreover, the system of the Bluetooth device 810 also includes a Bluetooth management framework 815, and the Bluetooth management framework 815 is used to manage the master Bluetooth protocol stack 811 and the slave Bluetooth protocol stack 812, and realize state management, information interaction and information synchronization between the two protocol stacks .

Optionally, in order to achieve compatibility with traditional Bluetooth devices, the original Bluetooth protocol stack in the system is used as the main protocol stack to support the main Bluetooth functions of the system, and the newly added slave Bluetooth protocol stack at least provides support for advanced audio distribution protocols. (Advanced Audio Distribution Profile, A2DP) and the support of the underlying Bluetooth protocol, that is, to realize the most basic audio data transmission from the Bluetooth protocol stack, which is lighter than the main Bluetooth protocol stack.

Please refer to FIG. 9 , which shows a structural block diagram of an audio transmission device between Bluetooth devices provided by an embodiment of the present application. The device can be implemented as all or a part of the first Bluetooth device through software, hardware or a combination of the two. The unit includes:

The first connection module 910 is configured to establish m bluetooth connections with the second bluetooth device through m bluetooth chips in the n bluetooth chips, the second bluetooth device is provided with at least m bluetooth chips, and m is greater than Equal to 2, and m is less than or equal to n;

The instruction receiving module 920 is configured to receive an audio playing instruction, and the audio playing instruction is used to instruct to play the audio in the first Bluetooth device through the second Bluetooth device;

The data sending module 930 is configured to send audio data to the second Bluetooth device through the m Bluetooth connections according to the audio playback instruction, wherein different Bluetooth connections are used to send audio data of the same audio.

Optionally, the first connection module 910 includes:

The first connection unit is configured to establish a master Bluetooth connection with the second master Bluetooth chip in the second Bluetooth device through the first master Bluetooth chip among the n Bluetooth chips;

The second connection unit is configured to establish m-1 slave Bluetooth connections with the second Bluetooth device through the master Bluetooth connection.

Optionally, the second connection unit is used for:

Perform Bluetooth information interaction with the second Bluetooth device through the main Bluetooth connection, and the Bluetooth information includes at least the number of Bluetooth chips in the Bluetooth device;

If the number of bluetooth chips in the second bluetooth device is at least two, start the first slave bluetooth chip in the first bluetooth device;

Establish the slave Bluetooth connection with the second slave Bluetooth chip in the second Bluetooth device through the first slave Bluetooth chip.

Optionally, the second connection unit is also used for:

Obtain the Bluetooth MAC address of the second slave Bluetooth chip through the master Bluetooth connection;

Establish the slave Bluetooth connection with the second slave Bluetooth chip through the first slave Bluetooth chip according to the Bluetooth MAC address.

Optionally, the system of the first Bluetooth device includes a Bluetooth management framework, a master Bluetooth protocol stack, and a slave Bluetooth protocol stack, and the Bluetooth management framework is used to manage the master Bluetooth protocol stack and the slave Bluetooth protocol stack, The slave Bluetooth protocol stack is independent of the master Bluetooth protocol stack;

The master Bluetooth protocol stack is used to manage the first master Bluetooth chip, the slave Bluetooth protocol stack is used to manage the first slave Bluetooth chip, and the slave Bluetooth protocol stack supports A2DP.

Optionally, the data sending module 930 includes:

A determination unit, configured to determine the audio code rate of the target audio indicated by the audio playback instruction;

A data sending unit, configured to send the audio data to the second Bluetooth device through the m Bluetooth connections if the audio code rate is higher than a code rate threshold.

Optionally, the data sending unit is used for:

Generate m channels of audio data according to the target audio, wherein each channel of audio data corresponds to a respective audio channel;

Sending the m channels of audio data to the second Bluetooth device through the m Bluetooth connections, where the m channels of audio data are time-synchronized.

Please refer to FIG. 10 , which shows a structural block diagram of an audio transmission device between Bluetooth devices provided by another embodiment of the present application. The device can be implemented as all or a part of the second bluetooth device through software, hardware or a combination of the two. The unit includes:

The second connection module 1010 is configured to establish m bluetooth connections with the first bluetooth device through the m bluetooth chips of the at least two bluetooth chips, the first bluetooth device is provided with n bluetooth chips, and m is greater than Equal to 2, and m is less than or equal to n;

The data receiving module 1020 is configured to receive the audio data sent by the first Bluetooth device through the m Bluetooth connections, wherein different Bluetooth connections are used to send audio data of the same audio;

The playing module 1030 is configured to play audio according to the audio data.

Optionally, the second connection module 1010 includes:

The third connection unit is configured to establish a master Bluetooth connection with the first master Bluetooth chip in the first Bluetooth device through the second master Bluetooth chip among the m Bluetooth chips;

The fourth connection unit is configured to establish m-1 slave Bluetooth connections with the first Bluetooth device through the master Bluetooth connection.

Optionally, the fourth connection unit is used for:

Perform Bluetooth information interaction with the first Bluetooth device through the main Bluetooth connection, and the Bluetooth information includes at least the number of Bluetooth chips in the Bluetooth device;

If the number of bluetooth chips in the first bluetooth device is at least two, start the second slave bluetooth chip in the second bluetooth device;

Establish the slave Bluetooth connection with the first slave Bluetooth chip in the first Bluetooth device through the second slave Bluetooth chip.

Optionally, the device also includes:

An address sending module, configured to send the Bluetooth MAC address of the second slave Bluetooth chip to the first Bluetooth device through the master Bluetooth connection, and the first Bluetooth device is configured to use the Bluetooth MAC address and the first Bluetooth device according to the Bluetooth MAC address and the first Bluetooth device. Two Bluetooth devices establish the slave Bluetooth connection.

Optionally, the system of the second Bluetooth device includes a Bluetooth management framework, a master Bluetooth protocol stack, and a slave Bluetooth protocol stack, and the Bluetooth management framework is used to manage the master Bluetooth protocol stack and the slave Bluetooth protocol stack, The slave Bluetooth protocol stack is independent of the master Bluetooth protocol stack;

The master Bluetooth protocol stack is used to manage the second master Bluetooth chip, the slave Bluetooth protocol stack is used to manage the second slave Bluetooth chip, and the slave Bluetooth protocol stack supports A2DP.

Optionally, the data receiving module 1020 is configured to:

Receive m channels of audio data sent by the first Bluetooth device through the m Bluetooth connections, wherein each channel of audio data corresponds to a respective audio channel, and the m channels of audio data are time-synchronized;

The playing module 1030 is used for:

Synchronous audio playback is performed through the audio channels corresponding to the m channels of audio data.

The embodiment of the present application also provides a computer-readable medium, the computer-readable medium stores at least one instruction, and the at least one instruction is loaded and executed by the processor to realize the Bluetooth device-to-device communication described in the above embodiments. audio transmission method.

The embodiment of the present application also provides a computer program product, the computer program product stores at least one instruction, and the at least one instruction is loaded and executed by the processor to realize the audio communication between Bluetooth devices as described in the above embodiments transfer method.

Those skilled in the art should be aware that, in the foregoing one or more examples, the functions described in the embodiments of the present application may be implemented by hardware, software, firmware or any combination thereof. When implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.

The above are only optional embodiments of the application, and are not intended to limit the application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the application shall be included in the protection of the application. within range.

Claims (15)

1. A method for audio transmission between bluetooth devices, characterized in that, the method is used for the first bluetooth device, and n bluetooth chips are arranged in the first bluetooth device, and n is greater than 2, and the method includes: Establishing a master Bluetooth connection with the second master Bluetooth chip in the second Bluetooth device through the first master Bluetooth chip in the n bluetooth chips; Establish m-1 slave bluetooth connections with the second bluetooth device through the master bluetooth connection, where at least m bluetooth chips are set in the second bluetooth device, m is greater than 2, and m is less than or equal to n; Receiving an audio play instruction, the audio play instruction is used to instruct to play the audio in the first Bluetooth device through the second Bluetooth device; According to the audio playing instruction, audio data is sent to the second Bluetooth device through the m Bluetooth connections, wherein different Bluetooth connections are used to send audio data of the same audio. 2. The method according to claim 1, wherein said establishing m-1 slave bluetooth connections with said second bluetooth device through said master bluetooth connection comprises: Perform Bluetooth information interaction with the second Bluetooth device through the main Bluetooth connection, and the Bluetooth information includes at least the number of Bluetooth chips in the Bluetooth device; If the number of bluetooth chips in the second bluetooth device is at least two, start the first slave bluetooth chip in the first bluetooth device; Establish the slave Bluetooth connection with the second slave Bluetooth chip in the second Bluetooth device through the first slave Bluetooth chip. 3. The method according to claim 2, wherein establishing the slave Bluetooth connection with the second slave Bluetooth chip in the second Bluetooth device through the first slave Bluetooth chip comprises: Obtaining the Bluetooth media access control MAC address of the second slave Bluetooth chip through the master Bluetooth connection; Establish the slave Bluetooth connection with the second slave Bluetooth chip through the first slave Bluetooth chip according to the Bluetooth MAC address. 4. The method according to claim 2, wherein the system of the first bluetooth device includes a bluetooth management framework, a master bluetooth protocol stack and a slave bluetooth protocol stack, and the bluetooth management framework is used to manage the master Bluetooth protocol stack and the slave Bluetooth protocol stack, the slave Bluetooth protocol stack is independent of the master Bluetooth protocol stack; The master bluetooth protocol stack is used to manage the first master bluetooth chip, the slave bluetooth protocol stack is used to manage the first slave bluetooth chip, and the slave bluetooth protocol stack supports advanced audio distribution protocol A2DP. 5. The method according to any one of claims 1 to 4, wherein the sending of audio data to the second Bluetooth device through the m Bluetooth connections according to the audio playback instruction comprises: Determine the audio code rate of the target audio indicated by the audio playback instruction; If the audio code rate is higher than the code rate threshold, send the audio data to the second Bluetooth device through the m Bluetooth connections. 6. The method according to claim 5, wherein the sending the audio data to the second Bluetooth device through the m Bluetooth connections comprises: Generate m channels of audio data according to the target audio, wherein each channel of audio data corresponds to a respective audio channel; Sending the m channels of audio data to the second Bluetooth device through the m Bluetooth connections, where the m channels of audio data are time-synchronized. 7. A method for audio transmission between bluetooth devices, characterized in that the method is used for a second bluetooth device, at least two bluetooth chips are arranged in the second bluetooth device, and the method comprises: Establishing a master Bluetooth connection with the first master Bluetooth chip in the first Bluetooth device through the second master Bluetooth chip in the m bluetooth chips of the at least two bluetooth chips; Establish m-1 slave Bluetooth connections with the first Bluetooth device through the master Bluetooth connection, where n Bluetooth chips are set in the first Bluetooth device, m is greater than 2, and m is less than or equal to n, and n is greater than 2 ; Receive audio data sent by the first Bluetooth device through the m Bluetooth connections, wherein different Bluetooth connections are used to send audio data of the same audio; Play audio according to the audio data. 8. The method according to claim 7, wherein said establishing m-1 slave Bluetooth connections with said first Bluetooth device through said master Bluetooth connection comprises: Perform Bluetooth information interaction with the first Bluetooth device through the main Bluetooth connection, and the Bluetooth information includes at least the number of Bluetooth chips in the Bluetooth device; If the number of bluetooth chips in the first bluetooth device is at least two, start the second slave bluetooth chip in the second bluetooth device; Establish the slave Bluetooth connection with the first slave Bluetooth chip in the first Bluetooth device through the second slave Bluetooth chip. 9. The method according to claim 8, characterized in that, after the second slave bluetooth chip in the second bluetooth device is started, the method further comprises: Send the Bluetooth media access control MAC address of the second slave Bluetooth chip to the first Bluetooth device through the master Bluetooth connection, and the first Bluetooth device is used to The device establishes said slave Bluetooth connection. 10. The method according to claim 8, wherein the system of the second bluetooth device includes a bluetooth management framework, a master bluetooth protocol stack and a slave bluetooth protocol stack, and the bluetooth management framework is used to manage the master Bluetooth protocol stack and the slave Bluetooth protocol stack, the slave Bluetooth protocol stack is independent of the master Bluetooth protocol stack; The master bluetooth protocol stack is used to manage the second master bluetooth chip, the slave bluetooth protocol stack is used to manage the second slave bluetooth chip, and the slave bluetooth protocol stack supports advanced audio distribution protocol A2DP. 11. The method according to any one of claims 7 to 10, wherein the receiving the audio data sent by the first Bluetooth device through the m Bluetooth connections comprises: Receive m channels of audio data sent by the first Bluetooth device through the m Bluetooth connections, wherein each channel of audio data corresponds to a respective audio channel, and the m channels of audio data are time-synchronized; The audio playing according to the audio data includes: Synchronous audio playback is performed through the audio channels corresponding to the m channels of audio data. 12. An audio transmission device between bluetooth devices, characterized in that the device is used for a first bluetooth device, and n bluetooth chips are arranged in the first bluetooth device, n is greater than 2, and the device includes: The first connection module is used to establish a main bluetooth connection with the second main bluetooth chip in the second bluetooth device through the first main bluetooth chip among the n bluetooth chips; The second bluetooth device establishes m-1 slave bluetooth connections. The second bluetooth device is provided with at least m bluetooth chips, m is greater than 2, and m is less than or equal to n; An instruction receiving module, configured to receive an audio playing instruction, and the audio playing instruction is used to instruct to play the audio in the first Bluetooth device through the second Bluetooth device; The data sending module is configured to send audio data to the second Bluetooth device through the m Bluetooth connections according to the audio playback instruction, wherein different Bluetooth connections are used to send audio data of the same audio. 13. An audio transmission device between bluetooth devices, characterized in that the device is used for a second bluetooth device, and at least two bluetooth chips are arranged in the second bluetooth device, and the device comprises: The second connection module is used to establish a main bluetooth connection with the first main bluetooth chip in the first bluetooth device through the second main bluetooth chip in the m bluetooth chips of the at least two bluetooth chips; through the main bluetooth chip Bluetooth connection, establishing m-1 slave Bluetooth connections with the first Bluetooth device, where n Bluetooth chips are set in the first Bluetooth device, m is greater than 2, and m is less than or equal to n, and n is greater than 2; A data receiving module, configured to receive the audio data sent by the first Bluetooth device through the m Bluetooth connections, wherein different Bluetooth connections are used to send audio data of the same audio; The playing module is used for playing audio according to the audio data. 14. A bluetooth device, characterized in that the bluetooth device includes a processor, a memory and at least two bluetooth chips; the memory stores at least one instruction, and the at least one instruction is used to be executed by the processor to Realize the audio transmission method between Bluetooth devices according to any one of claims 1 to 6, or realize the audio transmission method between Bluetooth devices according to any one of claims 7 to 11. 15. A computer-readable storage medium, characterized in that the storage medium stores at least one instruction, and the at least one instruction is used to be executed by a processor to realize the Bluetooth device according to any one of claims 1 to 6 The audio transmission method between Bluetooth devices, or realize the audio transmission method between Bluetooth devices according to any one of claims 7 to 11.

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