Audio data transmission method, charging box, true wireless earphone and audio playing system

Abstract

The embodiment of the invention provides an audio data transmission method, a charging box, a true wireless earphone and an audio playing system. The audio data transmission method is applied to a charging box processor, and a charging box is used for charging a real wireless earphone. The charging box further comprises a WiFi module and a first Bluetooth module, the WiFi module is used for being connected with sound source equipment, the first Bluetooth module supports a Bluetooth high data throughput (HDT) protocol, and the first Bluetooth module is used for being connected with the true wireless earphone through a Bluetooth HDT; the audio data transmission method comprises the following steps: receiving to-be-played audio data transmitted by the sound source equipment through WiFi through the WiFi module; and transmitting the audio data to be played to the true wireless earphone based on the first Bluetooth module and the Bluetooth HDT protocol. The method is helpful for improving the transmission efficiency of the audio data.

Description

Technical Field

[0001] This application relates to the field of wireless earphones. Specifically, an audio data transmission method, a charging case, true wireless earphones, and an audio playback system are provided. Background Art

[0002] True wireless earphones can communicate and connect with a sound source device such as a mobile phone via Bluetooth to receive audio data sent by the sound source device and play it.

[0003] High-quality audio data can reflect more details. Playing high-quality audio data helps to improve the user's listening experience. However, high-quality audio data is usually large. When it needs to be transmitted to the true wireless earphones for playback completely and losslessly, a high transmission efficiency is required. Otherwise, situations such as delay, stuttering, and impaired sound quality may occur, affecting the listening effect.

[0004] Currently, the transmission efficiency of Bluetooth protocols supported by sound source devices such as low-energy Bluetooth technology and classic Bluetooth is difficult to meet the requirements for high-quality audio data transmission. Summary of the Invention

[0005] In view of this, this application aims to provide an audio data transmission method, a charging case, true wireless earphones, and an audio playback system to meet the requirements for transmission efficiency when the sound source device transmits high-quality audio data to the true wireless earphones.

[0006] First, an embodiment of this application provides an audio data transmission method, which is applied to a charging case. The charging case is used to charge TWS (True Wireless Stereo) earphones; the charging case further includes a WiFi (Wireless Fidelity) module and a first Bluetooth module. The WiFi module is used to connect to the sound source device, and the first Bluetooth module supports the Bluetooth HDT (Higher Data Throughput) protocol. The first Bluetooth module is used to connect to the true wireless earphones via Bluetooth HDT; the audio data transmission method includes: receiving the audio data to be played transmitted by the sound source device through the WiFi module; transmitting the audio data to be played to the true wireless earphones based on the first Bluetooth module and the Bluetooth HDT protocol.

[0007] Compared with Bluetooth, WiFi has a higher data transmission efficiency. However, WiFi has higher power consumption. At the same time, setting up a WiFi module will occupy a certain area. The size of a single true wireless earphone is small. Due to size and battery life, setting up a WiFi module on a true wireless earphone will increase the size of the true wireless earphone and reduce the battery life. In the embodiments of the present application, the charging case has a larger size and volume, and can be configured with more circuits and a larger battery. Therefore, setting up a WiFi module on the charging case to receive the audio data to be played through the WiFi module and forward it to the true wireless earphone can effectively avoid the impact of WiFi communication on the battery life and volume of the true wireless earphone. At the same time, compared with classic Bluetooth and low-power Bluetooth, the Bluetooth HDT protocol can provide a higher data transmission rate, which can match the data transmission rate of WiFi, thus effectively meeting the need to transmit high-quality audio data. However, at present, the Bluetooth HDT protocol is a new Bluetooth specification, and many smart devices cannot be compatible. If all devices are to be made compatible with the HDT protocol, it may take a long time for popularization and incur a large cost. And true wireless earphones and charging cases are usually paired. When a user buys true wireless earphones, they will get the charging case at the same time. Therefore, in the embodiments of the present application, the charging case is made to support the Bluetooth HDT protocol and can be connected to the audio source device through WiFi, so as to receive the audio data to be played through WiFi and transmit the audio data to be played to the true wireless earphone through the HDT protocol, which can effectively improve the transmission rate of the audio data to be played. At the same time, it can effectively reduce the time and cost required for popularizing the HDT protocol, enabling users to listen to higher-quality audio data with true wireless earphones earlier and improving the user experience.

[0008] In one embodiment, the first Bluetooth module also supports the low-power Bluetooth protocol, and the first Bluetooth module is also used to establish a low-power Bluetooth connection with the true wireless earphone. The audio data transmission method includes: transmitting command data between the charging case and the true wireless earphone through the low-power Bluetooth connection.

[0009] In the embodiments of the present application, a low-power Bluetooth connection can also be established between the charging case and the true wireless earphone to transmit command data through the low-power Bluetooth connection, which does not affect the Bluetooth HDT connection for transmitting audio data. Even if the Bluetooth HDT connection is disconnected, the charging case and the true wireless earphone can still maintain communication through the low-power Bluetooth, without affecting the command transmission between the two. The power consumption of the low-power Bluetooth is low, and it can also reduce the impact of the communication connection on the battery life of the true wireless earphone.

[0010] In one embodiment, the sound source device and the truly wireless earphones are connected via Bluetooth. When the charging case does not receive the audio data to be played sent by the sound source device or the charging case does not transmit the audio data to be played to the truly wireless earphones, the audio data to be played is transmitted between the sound source device and the truly wireless earphones via Bluetooth.

[0011] In the embodiments of the present application, the charging case acts as a relay to forward the audio data to be played sent by the sound source device to the truly wireless earphones. When the charging case does not receive the audio data to be played sent by the sound source device or the charging case does not transmit the audio data to be played to the truly wireless earphones, it may be that the transmission ends or there is an abnormality in the relay of the charging case, making the charging case unable to forward the audio data any more. To transmit the audio data in a timely manner, the audio data to be played can be transmitted between the sound source device and the truly wireless earphones via Bluetooth to improve the audio playback effect.

[0012] In one embodiment, the audio data transmission method further includes: monitoring the remaining power of the charging case; when the remaining power is less than a preset power threshold, disconnecting the WiFi connection between the charging case and the sound source device and the Bluetooth HDT connection between the charging case and the truly wireless earphones; wherein, the sound source device is configured to: in response to the disconnection of the WiFi connection with the charging case, switch to transmitting the audio data to be played to the truly wireless earphones via Bluetooth; and the truly wireless earphones are configured to: in response to the disconnection of the Bluetooth HDT connection with the charging case, switch to transmitting the audio data to be played to the sound source device via Bluetooth.

[0013] Compared with Bluetooth, WiFi consumes more power when transmitting data. Therefore, in the embodiments of the present application, the charging case can monitor the remaining power. When the remaining power is low, the charging case disconnects the communication connections with the sound source device and the truly wireless earphones to reserve a certain amount of power for charging the truly wireless earphones and improve the battery life.

[0014] In one embodiment, the audio data transmission method further includes: monitoring the first connection quality between the charging case and the truly wireless earphones; when the first connection quality is less than a first preset quality threshold, disconnecting the WiFi connection between the charging case and the sound source device and the Bluetooth HDT connection between the charging case and the truly wireless earphones; wherein, the sound source device is configured to: in response to the disconnection of the WiFi connection with the charging case, switch to transmitting the audio data to be played to the truly wireless earphones via Bluetooth; and the truly wireless earphones are configured to: in response to the disconnection of the Bluetooth HDT connection with the charging case, switch to transmitting the audio data to be played to the sound source device via Bluetooth.

[0015] Poor connection quality of the communication connection will affect the transmission efficiency and power consumption of data. Therefore, in the embodiments of the present application, if the connection quality between the charging case and the true wireless earphones is poor, the connection with the sound source device and the true wireless earphones can be disconnected, so that the true wireless earphones and the sound source device transmit the audio data to be played via Bluetooth, to ensure the stability of data transmission and reduce power consumption.

[0016] In one embodiment, the sound source device and the true wireless earphones are connected via Bluetooth. The audio data transmission method further includes: monitoring the second connection quality between the charging case and the sound source device; and disconnecting the WiFi connection between the charging case and the sound source device and the Bluetooth HDT connection between the charging case and the true wireless earphones when the second connection quality is less than a second preset quality threshold. Wherein, the sound source device is configured to: switch to transmit the audio data to be played to the true wireless earphones via Bluetooth in response to the disconnection of the WiFi connection with the charging case; and the true wireless earphones are configured to: switch to transmit the audio data to be played to the sound source device via Bluetooth in response to the disconnection of the Bluetooth HDT connection with the charging case.

[0017] Poor connection quality of the communication connection will affect the transmission efficiency and power consumption of data. Therefore, in the embodiments of the present application, if the second connection quality between the charging case and the sound source device is poor, the connection between the charging case and the sound source device and the true wireless earphones can be disconnected, so that the true wireless earphones and the sound source device transmit the audio data to be played via Bluetooth, to ensure the stability of data transmission and reduce power consumption.

[0018] In one embodiment, the first connection quality and the second connection quality are characterized by at least one of the following: signal strength indication; bit error rate; packet error rate; signal-to-noise ratio; retransmission ratio.

[0019] In one embodiment, the WiFi module and the sound source device are connected via WiFi direct connection; receiving the audio data to be played transmitted by the sound source device through the WiFi module includes: receiving the audio data to be played transmitted by the sound source device through the WiFi direct connection between the WiFi module and the sound source device.

[0020] In the embodiments of the present application, the WiFi module and the sound source device are connected via WiFi direct connection, without the need for other devices to relay, effectively improving the reliability of the transmission of the audio data to be played and reducing the interference on the data transmission path.

[0021] In one embodiment, the WiFi module and the sound source device are connected to the same WiFi network; the WiFi module is configured to support at least one of the DLNA (Digital Living Network Alliance) protocol and the Airplay protocol; receiving the audio data to be played transmitted by the sound source device through the WiFi module includes: the WiFi module receiving the audio data to be played transmitted by the sound source device through the protocol or the Airplay protocol.

[0022] In one embodiment, one of the charging case and the sound source device is configured as a soft access point (softAP), and the other is connected to the device configured as the softAP to access the same WiFi network.

[0023] In the embodiment of the present application, one of the charging case and the sound source device is configured as a soft access point (softAP). Thus, the other device does not need to access the WiFi network through devices such as a router, but is directly connected to the device of the softAP. Therefore, the need for other devices as relays can be eliminated, improving the reliability of data transmission.

[0024] In a second aspect, the embodiment of the present application provides an audio data transmission method, which is applied to a true wireless earphone. The true wireless earphone includes a second Bluetooth module, and the true wireless earphone is Bluetooth-connected to the first Bluetooth module of the charging case through the second Bluetooth module; both the first Bluetooth module and the second Bluetooth module support the Bluetooth High Data Throughput (HDT) protocol; the charging case further includes a processor and a WiFi module, and the WiFi module is used to connect to a sound source device; the audio data transmission method includes: receiving the audio data to be played transmitted by the charging case through the second Bluetooth module and the Bluetooth HDT protocol; wherein, the charging case receives the audio data to be played transmitted by the sound source device through the WiFi module, and transmits the audio data to be played to the true wireless earphone based on the first Bluetooth module and the Bluetooth HDT protocol.

[0025] In the embodiment of the present application, the charging case can transmit the audio data to be played through the WiFi and HDT protocols, and the true wireless earphone receives the audio data to be played transmitted by the charging case through the HDT protocol. Therefore, the transmission rate of the audio data to be played can be effectively increased, meeting the requirements of high-quality audio data for the transmission rate.

[0026] In a third aspect, an embodiment of the present application provides a true wireless earphone, including: a second Bluetooth module; the second Bluetooth module supports the Bluetooth High Data Throughput (HDT) protocol; the true wireless earphone is charged through a charging case, and the charging case is used to execute the audio data transmission method according to any one of the first aspects; the second Bluetooth module is used to communicate with the charging case through Bluetooth connection and transmit the audio data to be played based on the Bluetooth HDT protocol.

[0027] In a fourth aspect, an embodiment of the present application provides a charging case for charging a true wireless earphone. The charging case includes: a processor for executing the audio data transmission method according to any one of the first aspects; a WiFi module for connecting to a sound source device; a first Bluetooth module that supports the Bluetooth High Data Throughput (HDT) protocol, and the first Bluetooth module is used to connect to the true wireless earphone through Bluetooth.

[0028] In a fifth aspect, an embodiment of the present application provides a headphone system, including: a true wireless earphone and a charging case; the true wireless earphone includes a second Bluetooth module; the charging case includes: a processor, a WiFi module, and a first Bluetooth module; the processor is used to execute the audio data transmission method according to any one of the first aspects; the WiFi module is used to connect to a sound source device; the first Bluetooth module and the second Bluetooth module are connected through Bluetooth and both support the Bluetooth High Data Throughput (HDT) protocol.

[0029] In a sixth aspect, an embodiment of the present application provides an audio playback system, including: a sound source device; the charging case according to the fourth aspect, connected to the sound source device through the WiFi module; a true wireless earphone, including a second Bluetooth module that supports the Bluetooth HDT protocol, and connected to the first Bluetooth module of the charging case through the second Bluetooth module; the sound source device transmits the audio data to be played to the charging case through WiFi; the charging case transmits the audio data to be played to the true wireless earphone through the Bluetooth HDT protocol supported by the first Bluetooth module; the true wireless earphone receives and plays the audio data to be played through the second Bluetooth module and the Bluetooth HDT protocol. Description of the Drawings

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required to be used in the embodiments of the present application. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0031] Figure 1 It is a schematic structural diagram of a charging case provided by an embodiment of the present application;

[0032] Figure 2 The flowchart of the audio data transmission method applied to the charging case provided by an embodiment of the present application.

[0033] Icons: Charging case 100; Processor 110; WiFi module 120; First Bluetooth module 130; Charging module 140; Interface 150. Detailed implementation manners

[0034] In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer and more understandable, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0035] First of all, an embodiment of the present application provides a charging case, which is used to charge true wireless earphones.

[0036] Please refer to Figure 1 , Figure 1 which is a schematic diagram of a charging case 100 provided by an embodiment of the present application. The charging case 100 includes: a processor 110, a WiFi module 120 and a first Bluetooth module 130.

[0037] The WiFi module 120 is used to connect to a sound source device. The first Bluetooth module 130 supports the Bluetooth High Data Throughput (HDT) protocol. The first Bluetooth module 130 is used to connect to the true wireless earphones through Bluetooth HDT. Among them, the true wireless earphones also support the Bluetooth HDT protocol.

[0038] In some embodiments of the present application, the first Bluetooth module 130 can be connected to the WiFi module 120 to transmit the data received by the WiFi module to the first Bluetooth module, and then transmit it to the true wireless earphones through the first Bluetooth module.

[0039] In some other embodiments, the first Bluetooth module 130 can be indirectly connected to the WiFi module 120 through the processor 110. The processor is connected to the WiFi module, receives the audio data transmitted by the WiFi module, and transmits the audio data to the true wireless earphones through the first Bluetooth module to obtain the audio data. In addition, the processor can also perform some audio processing, such as audio decoding, audio encoding, etc. Among them, the audio data received by the WiFi module and the audio data sent to the first Bluetooth module can be in different encoding formats.

[0040] In some other embodiments of the present application, the charging case may further include an audio processing module, which can be used to process audio data, such as audio decoding, audio encoding, etc.

[0041] In some embodiments of the present application, the first Bluetooth module also supports the Bluetooth Low Energy protocol. The first Bluetooth module can also be used to connect to the true wireless earphones via Bluetooth Low Energy, and / or the first Bluetooth module can also be used to connect to the sound source device via Bluetooth Low Energy to transmit command data via Bluetooth Low Energy. Compared with classic Bluetooth, Bluetooth Low Energy has lower power consumption and can also reduce the impact of communication connection on the battery life of the true wireless earphones.

[0042] The processor 110 is configured to execute the audio data transmission method provided by the embodiments of the present application. The audio data transmission method will be described in detail later and will not be elaborated here.

[0043] In the embodiments of the present application, the charging case 100 is used to charge the true wireless earphones. Therefore, the charging case 100 further includes a charging module 140 and an interface 150. The interface 150 is used to connect to a power source or to connect to other devices. The charging module 140 and the interface 150 can refer to the prior art. In addition, the charging case 100 may further include a memory.

[0044] In addition, the charging case 100 includes a receiving cavity for receiving the true wireless earphones, and the receiving cavity has charging contacts corresponding to the true wireless earphones. The structure of the above-mentioned charging case 100 can refer to the prior art and will not be elaborated here.

[0045] Please refer to Figure 2 , Figure 2 which is a flowchart of the audio data transmission method applied to the charging case 100 provided by an embodiment of the present application. The audio data transmission method includes:

[0046] S210, receiving the audio data to be played transmitted by the sound source device through the WiFi module.

[0047] In the embodiments of the present application, the sound source device can be a mobile phone, a tablet computer or other types of smart devices, and is not limited herein.

[0048] The charging case 100 can communicate with the sound source device through the WiFi module 120 to receive the audio data to be played output by the sound source device through the WiFi module 120. The audio data to be played is the audio data that needs to be transmitted to the true wireless earphones for playback, including but not limited to music, voice or other types of audio data.

[0049] Compared with Bluetooth communication methods such as classic Bluetooth or Bluetooth Low Energy, WiFi communication has higher transmission efficiency and can effectively meet the transmission rate requirements of high-quality audio data.

[0050] True wireless earphones are characterized by their small size. Therefore, their circuits need to minimize the required area and volume as much as possible. When implementing WiFi communication, a corresponding WiFi module 120 needs to be configured, which will occupy a certain area. Even if the WiFi module 120 is configured on the true wireless earphones, implementing WiFi communication will consume a large amount of power. Due to the small size of the true wireless earphones, their batteries cannot be large. Therefore, limited by the battery life, the true wireless earphones cannot use WiFi communication to transmit data for a long time.

[0051] For the above reasons, in this application, the charging case 100 communicates with the sound source device via WiFi and forwards the audio data to be played. Compared with the true wireless earphones, the charging case 100 relaxes the requirements for size, can configure more circuits, and can configure a larger battery to provide stronger battery life.

[0052] In addition, in the embodiments of this application, the charging case 100 can also be configured with methods such as button control, operation panel, voice control, etc. to achieve WiFi connection with the sound source device. In some embodiments, the sound source device and the true wireless earphones also maintain a Bluetooth connection. The sound source device sends a command to connect to WiFi to the true wireless earphones, and the true wireless earphones forward it to the charging case 100 via Bluetooth, so that the charging case 100 maintains a WiFi connection with the sound source device. There are various implementation methods, and the above are only examples and will not be elaborated here.

[0053] In some embodiments of this application, the WiFi module 120 and the sound source device can be connected via WiFi Direct. Correspondingly, the audio data to be played transmitted by the sound source device is received through the WiFi module 120, including: receiving the audio data to be played transmitted by the sound source device through the WiFi Direct connection between the WiFi module 120 and the sound source device.

[0054] In the embodiments of this application, through WiFi Direct, the sound source device and the charging case 100 can communicate directly, which can reduce the influence of the data transmission path and improve the accuracy and reliability of data transmission.

[0055] In some other embodiments of this application, it is also possible to make the WiFi module 120 and the sound source device access the same WiFi network, for example, access the WiFi network provided by the same router.

[0056] In some embodiments, either the charging case 100 or the sound source device may be configured as a softAP (soft Access Point), and the other is connected to the device configured as the softAP to access the same WiFi network. Compared with accessing the WiFi network provided by a router, the method of configuring the softAP can reduce the situation of data transfer, thereby reducing the impact of the data transmission path on data accuracy. Among them, this method will increase the power consumption of the device configured as the softAP to a certain extent, and the connection method can be selected according to data accuracy and power consumption, which is not limited here.

[0057] In the method where the charging case 100 and the sound source device access the same WiFi network, the WiFi module 120 is configured to support at least one of the Digital Living Network Alliance DLNA protocol and the Airplay protocol. Correspondingly, the WiFi module 120 receives the audio data to be played transmitted by the sound source device, including: the WiFi module 120 receives the audio data to be played transmitted by the sound source device through the DLNA protocol or the Airplay protocol.

[0058] For example, the sound source device transmits the audio data to be played to the charging case 100 based on the DLNA protocol, and the charging case 100 uses the WiFi module 120 to receive the audio data to be played based on the DLNA protocol. Or, the sound source device transmits the audio data to be played to the charging case 100 based on the Airplay protocol, and the charging case 100 uses the WiFi module 120 to receive the audio data to be played based on the Airplay protocol.

[0059] S220, transmitting the audio data to be played to the true wireless earphones based on the first Bluetooth module and the Bluetooth HDT protocol.

[0060] In the embodiments of the present application, the first Bluetooth module 130 supports the Bluetooth HDT protocol, and the true wireless earphones also support the Bluetooth HDT protocol. Thus, the charging case 100 and the true wireless earphones can transmit the audio data to be played through the Bluetooth HDT protocol.

[0061] The Bluetooth HDT protocol is a specification upgraded based on the low-power Bluetooth technology, aiming to provide a higher data transmission rate while maintaining low power consumption. The maximum data transmission rate supported by low-power Bluetooth is 2Mbps, the maximum data transmission rate of classic Bluetooth is 3Mbps, while the Bluetooth HDT protocol can increase the data transmission rate to a maximum of 8Mbps to meet the requirements of high-quality sound, lossless transmission, and low latency. For example, to meet home entertainment: support the transmission requirements of high-quality audio data such as 5.1 or 7.1 surround sound and Dolby Atmos, and provide a high-quality audio experience.

[0062] However, the Bluetooth HDT protocol is a new specification, and existing smart devices serving as audio source devices usually cannot support it. For example, smart devices such as smartphones and tablets do not support the Bluetooth HDT specification. Smart devices can only transmit audio data to true wireless earphones via classic Bluetooth or low-power Bluetooth. However, the transmission speed of classic Bluetooth or low-power Bluetooth is relatively low. For example, the maximum data transmission rate supported by low-power Bluetooth is 2 Mbps, and the rate of classic Bluetooth is 3 Mbps, which is difficult to meet the requirements of high-quality audio data transmission rate.

[0063] If smart devices are to support the Bluetooth HDT protocol, it will take a long time for popularization. For example, upgrading existing devices to make them compatible with the HDT protocol, and configuring the HDT protocol for new devices. It will take a long time to popularize the support of the Bluetooth HDT protocol by smart devices, and during this period, relatively high costs may also be incurred.

[0064] For true wireless earphones, a charging case 100 is usually provided when purchasing true wireless earphones. Therefore, in the embodiments of the present application, it is selected to configure a first Bluetooth module 130 on the charging case 100, and make the first Bluetooth module 130 support the Bluetooth HDT protocol, and make the true wireless earphones support the Bluetooth HDT protocol, and realize the transmission of audio data to be played through the forwarding of the charging case 100, which helps to reduce the cost required to achieve high-speed audio data transmission. At the same time, it can also be quickly popularized.

[0065] Therefore, in the embodiments of the present application, the charging case 100 and the true wireless earphones can use the Bluetooth HDT protocol to transmit audio data to be played, so as to improve the transmission efficiency and meet the transmission requirements of high-quality audio data.

[0066] In the embodiments of the present application, the first Bluetooth module also supports the low-power Bluetooth protocol. The first Bluetooth module is also used to establish a low-power Bluetooth connection with the true wireless earphones. The audio data transmission method may further include: transmitting command data between the charging case and the true wireless earphones through the low-power Bluetooth connection.

[0067] On the one hand, when the Bluetooth HDT is not disconnected, the low-power Bluetooth connection between the charging case and the true wireless earphones is maintained, and command data is transmitted through the low-power Bluetooth, which does not affect the Bluetooth HDT connection for transmitting audio data, and the two are transmitted in parallel, thereby reducing the impact of command data transmission on audio data transmission. On the other hand, after the Bluetooth HDT is disconnected, the charging case and the true wireless earphones can still be connected through the low-power Bluetooth to transmit commands, avoiding the situation where the two cannot communicate due to the disconnection of the Bluetooth HDT connection and improving the connection stability between the two.

[0068] In some embodiments of the present application, the sound source device and the true wireless earphones can also be connected via Bluetooth. When the charging case does not receive the audio data to be played sent by the sound source device or the charging case does not transmit the audio data to be played to the true wireless earphones, the audio data to be played is transmitted between the sound source device and the true wireless earphones via Bluetooth.

[0069] That is to say, there are two transmission paths between the sound source device and the true wireless earphones. One is the Bluetooth connection between them, and the other is the path with the charging case 100 as a relay. When the charging case acts as a relay, whether the Bluetooth connection between the sound source device and the true wireless earphones is disconnected or connected does not affect the data transmission between them.

[0070] And when any one of the situations where the charging case does not receive the audio data to be played sent by the sound source device or the charging case does not transmit the audio data to be played to the true wireless earphones occurs, it indicates that the transmission of the audio data to be played ends or the charging case has an abnormality as a relay. The abnormality may be poor communication quality or disconnection between the charging case and the sound source device or the true wireless earphones, making the charging case unable to receive audio data or send audio data to the true wireless earphones. In this case, the charging case can issue an instruction to indicate one of the true wireless earphones or the sound source device to switch to transmitting audio data via Bluetooth connection, or the true wireless earphones and the sound source device actively switch to transmitting data via Bluetooth.

[0071] Among them, when the charging case only does not receive the audio data to be played sent by the sound source device and the charging case can communicate with the true wireless earphones normally, if the Bluetooth connection between the sound source device and the true wireless earphones is disconnected, a Bluetooth connection needs to be established between the sound source device and the true wireless earphones. At this time, since the charging case can communicate with the true wireless earphones normally, the charging case can transmit the audio data to be played that has been received and temporarily stored in the charging case to the true wireless earphones. Thus, the connection establishment and audio transmission proceed simultaneously, reducing the situation of data loss.

[0072] Among them, the Bluetooth connection between the sound source device and the true wireless earphones can be a low-power Bluetooth to reduce the power consumption of data transmission between them. The sound source device and the true wireless earphones can also be connected via classic Bluetooth, which is not limited here.

[0073] Correspondingly, in the embodiments of the present application, when the sound source device and the true wireless earphones are connected via Bluetooth, the sound source device is configured to: in response to the disconnection of the WiFi connection with the charging case 100, switch to transmitting the audio data to be played to the true wireless earphones via Bluetooth. And the true wireless earphones are configured to: in response to the disconnection of the Bluetooth HDT connection with the charging case 100, switch to transmitting the audio data to be played to the sound source device via Bluetooth.

[0074] The charging case 100 may be disconnected from the sound source device and the true wireless earphones for various reasons and cannot be used to transmit the audio data to be played. For example, the charging case 100 has insufficient power after charging the true wireless earphones, or the user only carries the true wireless earphones without carrying the charging case 100. In this case, the sound source device and the true wireless earphones can directly transmit the audio data to be played through Bluetooth to maintain the listening requirement of the audio data.

[0075] In some embodiments of the present application, the audio data transmission method may further include: monitoring the remaining power of the charging case 100; and disconnecting the WiFi connection between the charging case 100 and the sound source device and the Bluetooth HDT connection between the charging case and the true wireless earphones when the remaining power is less than a preset power threshold.

[0076] In this embodiment, when the remaining power is less than the preset power threshold, it indicates that the power of the charging case 100 is insufficient or low. At this time, by disconnecting the connection with the sound source device and the true wireless earphones, the charging case 100 no longer forwards the audio data to be played, thereby reducing power consumption and greatly reducing the power consumption of the charging case 100, so that the charging case 100 can reserve a certain amount of power to charge the true wireless earphones, thus better ensuring the battery life of the true wireless earphones. At this time, the true wireless earphones and the sound source device can transmit audio data through Bluetooth.

[0077] In this embodiment, the remaining power can be the value of the remaining power or the ratio of the value of the remaining power to the total power, which is not limited herein, and the preset power threshold is configured accordingly.

[0078] In addition, the audio data transmission method may further include: monitoring the first connection quality between the charging case 100 and the true wireless earphones; and disconnecting the WiFi connection between the charging case 100 and the sound source device and the Bluetooth HDT connection between the charging case and the true wireless earphones when the first connection quality is less than a first preset quality threshold.

[0079] When the connection quality (or communication quality) is poor, it may increase the power consumption of data transmission and reduce the stability of data transmission. Therefore, in the embodiments of the present application, the first connection quality between the charging case 100 and the true wireless earphones can be monitored. When the first connection quality is poor (i.e., less than the first preset quality threshold), the charging case 100 is not used for forwarding, but the sound source device and the true wireless earphones directly use Bluetooth for transmission. Although it may reduce the instruction of the audio data to be played, it can improve the stability of data transmission and reduce the unnecessary power consumption of the charging case 100.

[0080] Accordingly, the audio data transmission method may further include: monitoring the second connection quality between the charging case 100 and the sound source device; and disconnecting the WiFi connection between the charging case 100 and the sound source device and the Bluetooth HDT connection between the charging case and the true wireless earphones when the second connection quality is less than the second preset quality threshold. Thereby, unnecessary power consumption caused by poor connection quality between the charging case 100 and the sound source device can be reduced, and the stability of data transmission can be improved.

[0081] In the embodiments of the present application, the first connection quality and the second connection quality are characterized by at least one of the following: signal strength indication; bit error rate; packet error rate; signal-to-noise ratio; retransmission ratio.

[0082] Wherein, when multiple parameters are used for characterization, corresponding weights can be set for each parameter, and weighted summation is performed, and the first connection quality or the second connection quality is characterized according to the value of the weighted summation.

[0083] Based on the same inventive concept, the embodiments of the present application further provide a true wireless earphone, which includes a second Bluetooth module; the second Bluetooth module supports the Bluetooth High Data Throughput (HDT) protocol. The true wireless earphone is charged through the charging case 100, and the charging case 100 is the charging case 100 that executes the audio data transmission method provided in any of the foregoing embodiments. Wherein, the second Bluetooth module is used to communicate with the charging case 100 through Bluetooth and transmit the audio data to be played based on the Bluetooth HDT protocol.

[0084] In the embodiments of the present application, the true wireless earphone can be any one of in-ear earphones, semi-in-ear earphones, and open earphones.

[0085] In the embodiments of the present application, the second Bluetooth module may also support low-power Bluetooth, classic Bluetooth, etc., which are not limited herein.

[0086] Based on the same inventive concept, the embodiments of the present application further provide an audio data transmission method applied to a true wireless earphone, and the audio data transmission method includes:

[0087] Receiving the audio data to be played transmitted by the charging case 100 through the second Bluetooth module and the Bluetooth HDT protocol.

[0088] Wherein, the charging case 100 can be the charging case 100 provided in the foregoing examples or the charging case 100 that executes the data transmission method applied to the charging case 100.

[0089] Based on the same inventive concept, the embodiments of the present application further provide a headset system, including: a true wireless earphone and a charging case 100.

[0090] The true wireless earphone includes a second Bluetooth module; the charging case 100 includes: a processor 110, a WiFi module 120, and a first Bluetooth module 130.

[0091] The processor 110 is configured to execute the foregoing audio data transmission method applied to the charging case 100. The WiFi module 120 is configured to connect to a sound source device. The first Bluetooth module 130 is Bluetooth HDT-connected to the second Bluetooth module, and both support the Bluetooth High Data Throughput HDT protocol.

[0092] In some embodiments, both the first Bluetooth module and the second Bluetooth module support Bluetooth Low Energy and are connected via Bluetooth Low Energy to transmit command data via Bluetooth Low Energy. Among them, the first Bluetooth module and the second Bluetooth module can simultaneously perform a Bluetooth Low Energy connection and a Bluetooth HDT connection, and transmit command data via Bluetooth Low Energy when the Bluetooth HDT connection is disconnected.

[0093] Based on the same inventive concept, the present application further provides an audio playback system, including: a sound source device, the charging case 100 as provided in the foregoing embodiments, and true wireless earphones.

[0094] Among them, the sound source device can be a mobile phone, a tablet computer, etc.

[0095] In this embodiment, the charging case 100 is connected to the sound source device via the WiFi module 120; the true wireless earphone includes a second Bluetooth module that supports the Bluetooth HDT protocol and is Bluetooth HDT-connected to the first Bluetooth module 130 of the charging case 100 via the second Bluetooth module; the sound source device transmits the audio data to be played to the charging case 100 via WiFi; the charging case 100 transmits the audio data to be played to the true wireless earphone via the Bluetooth HDT protocol supported by the first Bluetooth module 130. The true wireless earphone receives the audio data to be played via the second Bluetooth module and the Bluetooth HDT protocol and plays it. Based on the same inventive concept, the embodiments of the present application further provide a readable storage medium, on which a program is stored. When the computer program runs on a processor, the processor is caused to execute the audio data transmission method provided in the foregoing embodiments.

[0096] If the audio data transmission method is implemented in the form of a software functional module and sold or used as an independent product, it can be stored in a readable storage medium. Based on such an understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. The software product is stored in a storage medium and includes several instructions for causing a device including a processor (which can be a charging case, a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application.

[0097] In the embodiments provided in the present application, it should be understood that the disclosed methods and devices can also be implemented in other ways. The device embodiments described above are merely illustrative. In each of the embodiments of the present application, the functional modules can be integrated together to form an independent part, or each module can exist alone, or two or more modules can be integrated to form an independent part.

[0098] The above embodiments can be freely combined without conflict, and the combined embodiments are covered by the protection scope of the present application.

[0099] As mentioned above, the above are only the specific implementation manners of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present application can easily think of changes or substitutions, which should all be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

[0100] It should be noted that in this article, the term "comprising", "including" or any other variant thereof is intended to cover a non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article or device. Without further limitations, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

Claims

1. An audio data transmission method, characterized in that, Applied to a charging case for charging true wireless earphones; The charging case further includes a WiFi module and a first Bluetooth module. The WiFi module is used to connect to a sound source device, and the first Bluetooth module supports the Bluetooth High Data Throughput (HDT) protocol. The first Bluetooth module is used to connect to the true wireless earphones via Bluetooth HDT; The audio data transmission method includes: Receiving the audio data to be played transmitted by the sound source device through the WiFi module; Transmitting the audio data to be played to the true wireless earphones based on the first Bluetooth module and the Bluetooth HDT protocol.

2. The audio data transmission method according to claim 1, wherein: The first Bluetooth module also supports the Low Energy Bluetooth protocol. The first Bluetooth module is also used to establish a Low Energy Bluetooth connection with the true wireless earphones. The audio data transmission method further includes: Transmitting command data between the charging case and the true wireless earphones through the Low Energy Bluetooth connection.

3. The audio data transmission method according to claim 1, wherein: There is a Bluetooth connection between the sound source device and the true wireless earphones. When the charging case does not receive the audio data to be played sent by the sound source device or the charging case does not transmit the audio data to be played to the true wireless earphones, the sound source device and the true wireless earphones transmit the audio data to be played via Bluetooth.

4. The audio data transmission method according to claim 3, wherein: The audio data transmission method further includes: Monitoring the remaining power of the charging case; When the remaining power is less than a preset power threshold, disconnecting the WiFi connection between the charging case and the sound source device and the Bluetooth HDT connection between the charging case and the true wireless earphones; Wherein, the sound source device is configured to: in response to the disconnection of the WiFi connection with the charging case, switch to transmitting the audio data to be played to the true wireless earphones via Bluetooth; And, the true wireless earphones are configured to: in response to the disconnection of the Bluetooth HDT connection with the charging case, switch to transmitting the audio data to be played to the sound source device via Bluetooth.

5. The audio data transmission method according to claim 3, wherein: The audio data transmission method further includes: Monitoring the first connection quality between the charging case and the true wireless earphones; When the first connection quality is less than a first preset quality threshold, disconnecting the WiFi connection between the charging case and the sound source device and the Bluetooth HDT connection between the charging case and the true wireless earphones; Wherein, the sound source device is configured to: in response to the disconnection of the WiFi connection with the charging case, switch to transmitting the audio data to be played to the true wireless earphones via Bluetooth; And, the true wireless earphones are configured to: in response to the disconnection of the Bluetooth HDT connection with the charging case, switch to transmitting the audio data to be played to the sound source device via Bluetooth.

6. The audio data transmission method according to claim 3, wherein The audio data transmission method further includes: Monitoring the second connection quality between the charging case and the sound source device; When the second connection quality is less than a second preset quality threshold, disconnecting the WiFi connection between the charging case and the sound source device and the Bluetooth HDT connection between the charging case and the true wireless earphones; Wherein, the sound source device is configured to: switch to transmitting the audio data to be played to the true wireless earphones via Bluetooth in response to the disconnection of the WiFi connection with the charging case; And, the true wireless earphones are configured to: switch to transmitting the audio data to be played to the sound source device via Bluetooth in response to the disconnection of the Bluetooth HDT connection with the charging case.

7. The audio data transmission method according to claim 6, characterized in that: Characterize the first connection quality between the charging case and the true wireless earphones and / or the second connection quality between the charging case and the sound source device through at least one of the following: Signal strength indication; bit error rate; packet error rate; signal-to-noise ratio; retransmission ratio.

8. The audio data transmission method according to any one of claims 1 to 7, characterized in that: The WiFi module is connected to the sound source device through WiFi direct connection; Receiving the audio data to be played transmitted by the sound source device through the WiFi module includes: receiving the audio data to be played transmitted by the sound source device through the WiFi direct connection between the WiFi module and the sound source device.

9. The audio data transmission method according to any one of claims 1-7, characterized in that, The WiFi module and the sound source device are connected to the same WiFi network; the WiFi module is configured to support at least one of the Digital Living Network Alliance DLNA protocol and the Airplay protocol; Receiving the audio data to be played transmitted by the sound source device through the WiFi module includes: the WiFi module receiving the audio data to be played transmitted by the sound source device through the protocol or the Airplay protocol.

10. The audio data transmission method according to claim 9, wherein One of the charging case and the sound source device is configured as a soft access point (softAP), and the other is connected to the device configured as the softAP to access the same WiFi network.

11. An audio data transmission method, characterized in that, Applied to true wireless earphones, the true wireless earphones include a second Bluetooth module, and the true wireless earphones are Bluetooth-connected to the first Bluetooth module of the charging case through the second Bluetooth module; both the first Bluetooth module and the second Bluetooth module support the Bluetooth High Data Throughput (HDT) protocol; The charging case further includes a processor and a WiFi module, and the WiFi module is used to connect to the sound source device; The audio data transmission method includes: Receiving the audio data to be played transmitted by the charging case through the second Bluetooth module and the Bluetooth HDT protocol; Wherein, the charging case receives the audio data to be played transmitted by the sound source device through the WiFi module and transmits the audio data to be played to the true wireless earphones based on the first Bluetooth module and the Bluetooth HDT protocol.

12. A true wireless earphone, characterized in that, Includes: A second Bluetooth module; The second Bluetooth module supports the Bluetooth High Data Throughput (HDT) protocol; The true wireless earphones are charged through the charging case, and the charging case is used to execute the audio data transmission method according to any one of claims 1-9; The second Bluetooth module is used to communicate with the charging case through Bluetooth connection and transmit the audio data to be played based on the Bluetooth HDT protocol.

13. A charging box, characterized in that: For charging true wireless earphones, the charging case includes: A processor, used to execute the audio data transmission method according to any one of claims 1-9; A WiFi module, used to connect to the sound source device; A first Bluetooth module that supports the Bluetooth High Data Throughput (HDT) protocol, and the first Bluetooth module is used to connect to the true wireless earphones via Bluetooth.

14. A headphone system, characterized in that: It includes: True wireless earphones and a charging case; The true wireless earphones include a second Bluetooth module; The charging case includes: a processor, a WiFi module, and a first Bluetooth module; The processor is used to execute the audio data transmission method according to any one of claims 1-9; the WiFi module is used to connect to a sound source device; the first Bluetooth module is connected to the WiFi module; The first Bluetooth module and the second Bluetooth module are Bluetooth-connected and both support the Bluetooth High Data Throughput (HDT) protocol.

15. An audio playback system, characterized in that, It includes: A sound source device; The charging case according to claim 13 is connected to the sound source device via the WiFi module; True wireless earphones, including a second Bluetooth module that supports the Bluetooth HDT protocol, and are Bluetooth-connected to the first Bluetooth module of the charging case via the second Bluetooth module; The sound source device transmits the audio data to be played to the charging case via WiFi; The charging case transmits the audio data to be played to the true wireless earphones via the Bluetooth HDT protocol supported by the first Bluetooth module; The true wireless earphones receive the audio data to be played via the second Bluetooth module and the Bluetooth HDT protocol and play it.

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