A Bluetooth-based audio sensorless transmission method for a co-pilot entertainment system

Abstract

The present invention provides a method for transmitting audio of a co-pilot entertainment system without sense based on Bluetooth, the method comprising: the co-pilot entertainment system and the central control entertainment system automatically receive the VIN code on the vehicle CAN bus, and automatically change the name of their respective Bluetooth modules; after the co-pilot entertainment system receives the instruction to play audio, the Bluetooth module of the co-pilot entertainment system searches and determines whether the Bluetooth module of the central control entertainment system is connected, if not connected, the Bluetooth module of the co-pilot entertainment system actively connects to the Bluetooth module of the central control entertainment system; the Bluetooth module of the central control entertainment system monitors the state of the transmitted audio stream, and switches to the audio output of the co-pilot entertainment system when it is confirmed that the Bluetooth module of the co-pilot entertainment system requests to play the audio stream of the co-pilot entertainment system. The present invention realizes automatic Bluetooth pairing connection through the vehicle VIN code, establishes an audio wireless transmission channel, and also realizes automatic switching of the audio source of the co-pilot entertainment system on the central control entertainment system through Bluetooth identity judgment.

Description

Technical Field

[0001] The present invention mainly relates to an in-cockpit audio transmission method, and particularly to a method for wirelessly transmitting audio of a co-pilot entertainment system based on Bluetooth. Background Art

[0002] With the development of intelligent vehicle cockpits, the co-pilot has gradually become a dedicated entertainment space. During driving, the co-pilot can wear headphones to listen to music, watch movies and make video calls, etc., or choose to emit sound from the in-vehicle power amplifier speakers. The co-pilot entertainment system has become a standard configuration in many new vehicle models.

[0003] Currently, some vehicle manufacturers use an Electronic Control Unit (ECU for short) to control the central control and co-pilot displays. The switching or transmission of sound can be flexibly controlled, but this method depends on a large improvement in the hardware resources of the central control ECU. Moreover, the development and production of traditional central control entertainment systems are relatively mature. How to install a co-pilot entertainment system beside the existing central control entertainment system and achieve wireless audio transmission is a problem. Therefore, some manufacturers use two ECUs to control the central control and co-pilot displays respectively. This solution requires establishing an audio transmission path between the two ECUs. The solution of transmitting through hard-wired methods such as Ethernet has high costs, a large amount of adaptation and modification for the central control ECU, and a complex structure.

[0004] On the other hand, ordinary Bluetooth devices need to be manually paired, with many steps such as selecting and searching, and the pairing pop-up window needs to be manually confirmed. The operation is complex, especially the first pairing is more complicated. There may also be situations such as the vehicle computer deleting paired devices and restoring the factory settings; at the same time, connecting and disconnecting often occur after pairing, and there are also many operation steps; secondly, after the Bluetooth connection is successful, it is still necessary to switch the media playback source on the central control entertainment system, which is inconvenient to operate and the user experience is poor; moreover, the Bluetooth Media Audio Transmission Profile (A2DP for short) only supports the connection of one device. If the central control entertainment system is already connected to a mobile phone, it is necessary to manually switch the connection to the co-pilot entertainment system. Summary of the Invention

[0005] It should be understood that the above general description and the following detailed description of the present disclosure are both exemplary and explanatory, and are intended to provide further explanation of the present disclosure.

[0006] The technical problem to be solved by the present invention is to achieve automatic Bluetooth pairing and connection through the vehicle's VIN code, establish a wireless audio transmission channel, and at the same time achieve automatic switching of audio sources on the two entertainment systems through Bluetooth identity, providing a good user experience.

[0007] To solve the above technical problems, the present invention provides a method for audio lossless transmission of a co-pilot entertainment system based on Bluetooth, which is characterized in that the method includes:

[0008] Step 1, the co-pilot entertainment system and the central control entertainment system automatically receive the VIN code on the vehicle CAN bus, and the respective Bluetooth modules automatically change the naming.

[0009] Step 2, after the co-pilot entertainment system receives the audio playback instruction, the Bluetooth module of the co-pilot entertainment system searches for and determines whether the Bluetooth module of the central control entertainment system is connected. If not connected, the Bluetooth module of the co-pilot entertainment system actively connects to the Bluetooth module of the central control entertainment system.

[0010] Step 3, the Bluetooth module of the central control entertainment system monitors the state of the transmitted audio stream, and switches to the audio output of the co-pilot entertainment system when it is confirmed that the Bluetooth module of the co-pilot entertainment system requests to play the audio stream of the co-pilot entertainment system.

[0011] Preferably, the present invention further provides a method for audio lossless transmission of a co-pilot entertainment system based on Bluetooth, which is characterized in that

[0012] During the active connection process in Step 2, the Bluetooth module of the co-pilot entertainment system and the Bluetooth module of the central control entertainment system verify the received Bluetooth name and VIN code to determine whether they correspond. If they do not correspond, continue to search for devices. If they correspond, perform pairing.

[0013] Wherein, the pairing includes the Bluetooth module of the co-pilot entertainment system and the Bluetooth module of the central control entertainment system recording the identity address information of each other and connecting the transmission protocol.

[0014] Preferably, the present invention further provides a method for audio lossless transmission of a co-pilot entertainment system based on Bluetooth, which is characterized in that

[0015] After the active connection step in Step 2, it further includes

[0016] The Bluetooth module of the co-pilot entertainment system sends the obtained VIN code through the SPP protocol for identity verification. After passing the verification, it prompts that the Bluetooth module of the co-pilot entertainment system and the Bluetooth module of the central control entertainment system are paired successfully.

[0017] Preferably, the present invention further provides a method for audio lossless transmission of a co-pilot entertainment system based on Bluetooth, which is characterized in that

[0018] Between Step 2 and Step 3, it further includes:

[0019] Step 4: The Bluetooth module of the central control entertainment system determines whether it is connected to the mobile phone Bluetooth module. If connected, the Bluetooth module of the central control entertainment system disconnects the connection with the mobile phone Bluetooth module and accepts the connection request from the co-pilot entertainment system Bluetooth module; if not connected, the Bluetooth module of the central control entertainment system directly establishes a media audio transmission protocol connection with the co-pilot entertainment system Bluetooth module.

[0020] Preferably, the present invention further provides a method for seamless audio transmission of a co-pilot entertainment system based on Bluetooth, characterized in that

[0021] After the above step 4, it further includes

[0022] Step 5: The Bluetooth module of the central control entertainment system monitors the status of the transmitted audio stream and determines whether the co-pilot entertainment system Bluetooth module requests to play the audio stream of the co-pilot entertainment system;

[0023] If there is no request to play, the central control entertainment system continues the current media state;

[0024] If there is a request to play, the central control entertainment system determines whether there is media playing currently. If there is media playing, it automatically switches to the media source of the co-pilot entertainment system to continue playing; if there is no media playing, it directly plays the media of the co-pilot entertainment system.

[0025] Preferably, the present invention further provides a method for seamless audio transmission of a co-pilot entertainment system based on Bluetooth, characterized in that

[0026] Before the above step 1, it further includes determining whether the Bluetooth module of the co-pilot entertainment system is connected to an earphone. If connected, the earphone outputs audio.

[0027] Preferably, the present invention further provides a method for seamless audio transmission of a co-pilot entertainment system based on Bluetooth, characterized in that

[0028] The identity address information includes the verified mac address information.

[0029] Preferably, the present invention further provides a method for seamless audio transmission of a co-pilot entertainment system based on Bluetooth, characterized in that

[0030] The media audio transmission protocol includes A2DP.

[0031] Preferably, the present invention further provides a method for seamless audio transmission of a co-pilot entertainment system based on Bluetooth, characterized in that

[0032] The naming includes the manufacturer code and the string of the VIN code.

[0033] Compared with the prior art, the present invention realizes automatic Bluetooth pairing and connection through the vehicle VIN code, establishes an audio wireless transmission channel, and also realizes automatic switching of the audio source of the co-pilot entertainment system on the central control entertainment system through Bluetooth identity judgment, providing a better user experience and realizing the seamless transmission of the audio of the co-pilot entertainment system. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. Preferred embodiments of the present disclosure will now be described in detail, which are illustrated in the accompanying drawings. Whenever possible, the same reference numerals will be used throughout the drawings to refer to the same or like parts. In addition, although the terms used in the present disclosure are selected from well-known and commonly used terms, some of the terms mentioned in the description of the present disclosure may be selected by the applicant according to his or her judgment, and their detailed meanings are described in the relevant parts of the present description. In addition, it is required to understand the present disclosure not only by the actual terms used, but also by the meaning implied by each term.

[0035] Below, with reference to the accompanying drawings, for those skilled in the art of the present technology, the above and other objects, features and advantages of the present invention will be apparent from the detailed description of the present invention.

[0036] Figure 1 is a block diagram of the seamless audio transmission system of the co-pilot entertainment system based on Bluetooth according to the present invention;

[0037] Figure 2 is a flowchart of the Bluetooth pairing and connection of the present invention;

[0038] Figure 3 is a flowchart of playing media through a speaker in the co-pilot entertainment system by applying the present invention.

[0039] REFERENCE NUMERALS

[0040] 1 - Co-pilot entertainment system

[0041] 2 - Bluetooth module of the co-pilot entertainment system

[0042] 3 - Central control entertainment system

[0043] 4 - Bluetooth module of the central control entertainment system

[0044] 5 - Vehicle CAN bus

[0045] 6 - Mobile phone

[0046] 7 - Bluetooth module of the mobile phone DETAILED DESCRIPTION OF THE EMBODIMENTS

[0047] To more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some examples or embodiments of the present application. For those of ordinary skill in the art, without creative work, the present application can also be applied to other similar scenarios based on these drawings. Unless obvious from the language context or otherwise stated, the same reference numerals in the drawings represent the same structure or operation.

[0048] As shown in the present application and the claims, unless the context clearly indicates an exception, words such as "a", "an", "one", and / or "the" are not specifically singular and may also include the plural. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of the clearly identified steps and elements, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements.

[0049] Unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps described in these embodiments do not limit the scope of the present application. At the same time, it should be understood that for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant fields may not be discussed in detail, but in appropriate cases, the said technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0050] In the description of the present application, it should be understood that the orientation or positional relationships indicated by orientation words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal", and "top, bottom" are usually based on the orientation or positional relationships shown in the drawings. It is only for the convenience of describing the present application and simplifying the description. Without contrary instructions, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the protection scope of the present application; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0051] For ease of description, spatial relative terms, such as "above", "on top of", "on the upper surface", "upper", etc., may be used herein to describe the spatial positional relationship of one device or feature to other devices or features as shown in the figures. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figure is inverted, the device described as "above" or "on top of" other devices or structures will then be positioned "below" or "beneath" the other devices or structures. Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations of the spatial relative descriptions used herein will be made accordingly.

[0052] In addition, it should be noted that the use of terms such as "first", "second", etc. to limit components is only for the convenience of distinguishing the corresponding components. Without further statement, the above terms have no special meaning and thus should not be construed as limiting the scope of protection of this application. In addition, although the terms used in this application are selected from well-known and commonly used terms, some of the terms mentioned in the specification of this application may be selected by the applicant according to his or her judgment, and their detailed meanings are described in the relevant parts of the description herein. In addition, it is required to understand this application not only through the actual terms used, but also through the meaning implied by each term.

[0053] In this application, flowcharts are used to illustrate the operations performed by the system according to the embodiments of this application. It should be understood that the operations before or below do not necessarily have to be executed precisely in sequence. Instead, various steps can be executed in reverse order or simultaneously. At the same time, or other operations can be added to these processes, or one or more steps can be removed from these processes.

[0054] The transmission method of the present invention is based on the existing Bluetooth modules of two entertainment system ECUs to establish a method for controlling the audio transmission of the co-pilot entertainment system without sensing.

[0055] Please refer to Figure 1 The block diagram of the composition of the Bluetooth-based co-pilot entertainment system audio non-sensing transmission system of the present invention is shown.

[0056] The transmission system includes: two entertainment systems and a mobile terminal. The two systems are the co-pilot entertainment system 1 and the central control entertainment system 3 respectively. Each system has its own Bluetooth module, where the Bluetooth module 2 of the co-pilot entertainment system and the Bluetooth module 4 of the central control entertainment system. Similarly, the mobile phone 6 as the mobile terminal also includes the Bluetooth module 7 of the mobile phone. Information transmission is carried out between the Bluetooth modules 2 and 4 in the two systems and the vehicle CAN bus 5.

[0057] Figure 2 The flowchart of Bluetooth automatic pairing and connection is given, and the steps are described in detail as follows in combination with this flowchart:

[0058] Step 21, the co-pilot entertainment system 1 and the center console entertainment system 3 automatically receive the VIN information on the vehicle CAN bus 5. This VIN is the vehicle identification number, including many information such as the manufacturer.

[0059] Step 22, the Bluetooth module 2 of the co-pilot entertainment system and the Bluetooth module 4 of the center console entertainment system automatically change the naming (such as the manufacturer code and the string contained in the VIN).

[0060] Step 23, the Bluetooth module 2 of the co-pilot entertainment system searches for nearby devices according to the device name.

[0061] It should be noted that when the Bluetooth modules 2 and 4 in the co-pilot entertainment system 1 and the center console entertainment system 3 are turned on, they will broadcast their own Bluetooth names and other information. When the Bluetooth module 2 receives a trigger signal, which can be a user playing media or a transport signal on the CAN bus, it will automatically search for nearby Bluetooth devices.

[0062] Step 24, the Bluetooth module 2 of the co-pilot entertainment system and the Bluetooth module 4 of the center console entertainment system check the received Bluetooth name against the VIN code to determine if they match?

[0063] The external Bluetooth device name is checked against the received VIN code. Specifically, the VW code and the last four digits of the VIN number of the name are checked against the complete VIN code received on the CAN bus.

[0064] If they do not match, return to step 23 and continue to search for devices.

[0065] If they match, transfer to step 25 for pairing. During this pairing process, according to the verification result, neither the co-pilot entertainment system 1 nor the center console entertainment system 3 needs to display the pairing process on the interface, and there is no need for the user to operate manually, realizing a seamless pairing.

[0066] After the pairing is completed, the Bluetooth modules 2 and 4 of both sides remember the verified mac address information (the unique identity of the Bluetooth device) of each other, and at the same time connect relevant protocols, such as the media audio transmission protocol (A2DP).

[0067] It should be especially noted that in the traditional Bluetooth pairing method, a pop-up window for the pairing key needs to be popped up on the interface of the receiving end, that is, the center console entertainment system, and then the key needs to be input on the interface of the co-pilot entertainment system to perform the pairing. This automatic pairing step does not require manual input of the key.

[0068] Step 26, after pairing is completed, connect to the SPP protocol to verify the VIN code. That is, the Bluetooth 2 of the co-pilot entertainment system sends the obtained vehicle VIN code through the SPP protocol for identity verification, avoiding malicious devices changing the Bluetooth name to the same as that of the co-pilot entertainment system to pair with the central control entertainment system, ensuring that the logic of automatic pairing will not be attacked and guaranteeing the security of use;

[0069] Step 27, determine whether the verification is passed?

[0070] Step 28, if the verification is passed, the Bluetooth module 2 of the co-pilot entertainment system and the Bluetooth module 4 of the central control entertainment system are successfully paired and connected;

[0071] Step 29, if the verification fails, the Bluetooth module 4 of the central control entertainment system deletes the paired information and prompts that the pairing fails.

[0072] Figure 3 The flowchart for the co-pilot entertainment system to play media through the speaker is given and is described in detail as follows in combination with this flowchart:

[0073] Step 31, when the co-pilot entertainment system 1 wants to play media audio through the vehicle speaker, specifically, the user manually clicks the play button of the media to send an instruction;

[0074] Step 32, the co-pilot entertainment system 1 determines whether its Bluetooth module 2 is connected to the headset?

[0075] If connected to the headset, indicating that the headset has priority, go to Step 33, and the media of the co-pilot entertainment system 1 is directly output through the headset end;

[0076] If not connected to the headset, go to Step 34, then determine whether the Bluetooth module 2 of the co-pilot entertainment system 1 is connected to the Bluetooth module 4 of the central control entertainment system 3?

[0077] Following Step 34, if it is determined that the Bluetooth modules 2 and 4 of the co-pilot entertainment system 1 and the central control entertainment system 3 are already connected, go to Step 39;

[0078] If it is determined that the two Bluetooth modules 2 and 4 are not connected, go to Step 35, and the Bluetooth module 2 of the co-pilot entertainment system actively connects to the Bluetooth module 4 of the central control entertainment system;

[0079] When determining whether the Bluetooth 2 of the co-pilot entertainment system and the Bluetooth module 4 of the central control entertainment system are connected, in fact, it judges whether the two Bluetooth devices are paired. If not paired, the process of Steps 23 - 29 is carried out. If already paired, the protocol can be directly connected and there is no need to repeat Figure 2 the steps;

[0080] Step 36, the Bluetooth module 4 of the central control entertainment system determines whether it is connected to the mobile phone Bluetooth module 7?

[0081] In this step, the management logic of the Bluetooth module 4 of the central control entertainment system generally requires the user to manually disconnect one device before connecting another device. At this time, when the Bluetooth 4 of the central control entertainment system processes the connection request of the Bluetooth 2 of the co-pilot entertainment system, it needs to first determine whether the mobile phone is already connected. If it is connected, it will automatically disconnect the connection with the mobile phone and accept the connection request of the Bluetooth 2 of the co-pilot entertainment system.

[0082] If the two Bluetooth modules are connected and transfer to step 37, the Bluetooth module 4 of the central control entertainment system disconnects the connection with the Bluetooth module 7 of the mobile phone and accepts the connection request of the Bluetooth module 2 of the co-pilot entertainment system.

[0083] If the two Bluetooth modules in step 36 are not connected and transfer to step 38, the Bluetooth module 4 of the central control entertainment system directly establishes an A2DP connection with the Bluetooth module 2 of the co-pilot entertainment system.

[0084] Step 39, the Bluetooth module 4 of the central control entertainment system monitors the status of the audio stream being transmitted at this time and determines whether the Bluetooth module 2 of the co-pilot entertainment system requests to play the audio stream of the co-pilot entertainment system 1.

[0085] Generally, when the user manually switches the media source, the identity information of the device is not required and it plays directly. When the Bluetooth 4 of the central control entertainment system receives the Bluetooth audio, it already knows the identity of the currently connected device. In the case of realizing the automatic source switching and playing of the co-pilot entertainment system, it is necessary to request playback from the multimedia and HMI modules with the Bluetooth identity of the co-pilot entertainment system from bottom to top. At this time, the multimedia and HMI modules will automatically switch the media source if they determine that it is a request from the Bluetooth of the co-pilot entertainment system.

[0086] Step 40, if it is not the Bluetooth module 2 of the co-pilot entertainment system that requests playback, the central control entertainment system 3 continues the current media state.

[0087] Step 41, if it is the Bluetooth module 2 of the co-pilot entertainment system that requests playback, does the central control entertainment system 3 determine whether there is media playing currently?

[0088] Step 42, if there is media playing, the central control entertainment system 3 automatically switches to the media source of the co-pilot entertainment system 1 and continues to play.

[0089] Step 43, if the central control entertainment system 3 determines that there is no media playing currently, it directly plays the media of the co-pilot entertainment system 1, and the vehicle speakers play the sound of the co-pilot entertainment system 1.

[0090] It should be noted specifically that steps 41 to 43 after step 39 achieve automatic media source switching, avoiding manual operations.

[0091] During the above process, when the co-pilot entertainment system is outputting media audio through the vehicle's speakers, the central control entertainment system can manually switch the media source. If the co-pilot user needs to listen separately using a Bluetooth headset, they can select to connect the Bluetooth headset from the co-pilot entertainment system, and the Bluetooth protocol of the central control entertainment system will be disconnected, and the audio will be output from the headset side. When the co-pilot entertainment system needs to make an audio-video call, it actively connects to the HFP (call protocol) of the central control entertainment system's Bluetooth and makes a call to meet the co-pilot user's requirement for the call audio to be output from the vehicle's speakers.

[0092] The innovation of the present invention is mainly reflected in the following aspects:

[0093] First, Bluetooth automatic pairing and connection are achieved through the vehicle VIN code to establish a wireless audio transmission channel without user operation;

[0094] Second, the automatic switching of the audio source of the co-pilot entertainment system on the central control entertainment system is achieved through Bluetooth identity judgment, providing a better user experience;

[0095] Third, based on the existing hardware, the co-pilot entertainment system realizes the lossless transmission of audio, with low cost and a small amount of adaptation and modification to the central control ECU.

[0096] The basic concepts have been described above. Obviously, for those skilled in the art, the above invention disclosure is only an example and does not constitute a limitation to this application. Although not explicitly stated here, those skilled in the art may make various modifications, improvements, and corrections to this application. Such modifications, improvements, and corrections are proposed in this application, so such modifications, improvements, and corrections still fall within the spirit and scope of the exemplary embodiments of this application.

[0097] At the same time, specific terms are used in this application to describe the embodiments of this application. Such as "one embodiment", "an embodiment", and / or "some embodiments" mean a certain feature, structure, or characteristic related to at least one embodiment of this application. Therefore, it should be emphasized and noted that the "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more at different positions in this specification is not necessarily the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of this application can be appropriately combined.

[0098] Some aspects of the present application can be executed entirely by hardware, entirely by software (including firmware, resident software, microcode, etc.), or by a combination of hardware and software. The above-mentioned hardware or software can all be referred to as "data blocks", "modules", "engines", "units", "components", or "systems". The processor can be one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DAPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), processors, controllers, microcontrollers, microprocessors, or combinations thereof. In addition, aspects of the present application may be embodied as a computer product located on one or more computer-readable media, which includes computer-readable program code. For example, the computer-readable media may include, but is not limited to, magnetic storage devices (such as hard disks, floppy disks, magnetic tapes, etc.), optical disks (such as compact disks CD, digital versatile disks DVD, etc.), smart cards, and flash memory devices (such as cards, sticks, key drives, etc.).

[0099] The computer-readable media may include a propagated data signal that contains computer program code therein, such as on a baseband or as part of a carrier wave. The propagated signal may have various forms of representation, including electromagnetic form, optical form, etc., or a suitable combination thereof. The computer-readable media can be any computer-readable media other than a computer-readable storage media, which can be connected to an instruction execution system, apparatus, or device to effect communication, propagation, or transmission for use of a program. The program code located on the computer-readable media can be propagated through any suitable media, including radio, cable, fiber optic cable, radio frequency signal, or similar media, or any combination of the above media.

[0100] The basic concepts have been described above. Obviously, for those skilled in the art, the above invention disclosure is only an example and does not constitute a limitation to the present application. Although not explicitly stated here, those skilled in the art may make various modifications, improvements, and corrections to the present application. Such modifications, improvements, and corrections are proposed in the present application, so such modifications, improvements, and corrections still fall within the spirit and scope of the exemplary embodiments of the present application.

[0101] Meanwhile, the present application uses specific terms to describe the embodiments of the present application. Such as "one embodiment", "an embodiment", and / or "some embodiments" mean a certain feature, structure, or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that the "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more at different positions in this specification does not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of the present application can be appropriately combined.

[0102] Similarly, it should be noted that, in order to simplify the description disclosed in this application and thus help the understanding of one or more embodiments of the invention, in the foregoing description of the embodiments of this application, sometimes multiple features are incorporated into one embodiment, drawing or description thereof. However, this disclosure method does not mean that the features required by the subject matter of this application are more than those mentioned in the claims. In fact, the features of the embodiments are less than all the features of the single embodiment disclosed above.

[0103] In some embodiments, numbers are used to describe components and the quantity of attributes. It should be understood that such numbers used for the description of embodiments are modified by the modifiers "about", "approximate" or "substantially" in some examples. Unless otherwise stated, "about", "approximate" or "substantially" indicate that the said numbers allow a variation of ±20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, and such approximate values may change according to the characteristics required by individual embodiments. In some embodiments, the numerical parameters should consider the specified significant digits and adopt the method of retaining general digits. Although the numerical ranges and parameters used in some embodiments of this application to confirm the breadth of their scope are approximate values, in specific embodiments, the setting of such numerical values is as precise as possible within the feasible range.

[0104] Although this application has been described with reference to the current specific embodiments, those of ordinary skill in the art in this technical field should recognize that the above embodiments are only used to illustrate this application, and various equivalent changes or substitutions can be made without departing from the spirit of this application. Therefore, as long as the changes and modifications to the above embodiments are within the scope of the spirit of this application, they will fall within the scope of the claims of this application.

Claims

1. A Bluetooth-based audio sensorless transmission method for a co-pilot entertainment system, characterized in that: The method includes: Step 1: The co-pilot entertainment system and the central control entertainment system automatically receive the VIN code on the vehicle CAN bus and automatically change the name through their respective Bluetooth modules. Step 2: After the co-pilot entertainment system receives the play audio instruction, the Bluetooth module of the co-pilot entertainment system searches for and determines whether the Bluetooth module of the central control entertainment system is connected. If not connected, the Bluetooth module of the co-pilot entertainment system actively connects to the Bluetooth module of the central control entertainment system. Step 3: The Bluetooth module of the central control entertainment system monitors the status of the transmitted audio stream and switches to the audio output of the co-pilot entertainment system when it is confirmed that the Bluetooth module of the co-pilot entertainment system requests to play the audio stream of the co-pilot entertainment system. Further included between Step 2 and Step 3 is: Step 4: The Bluetooth module of the central control entertainment system determines whether it is connected to the mobile phone Bluetooth module. If connected, the Bluetooth module of the central control entertainment system disconnects the connection with the mobile phone Bluetooth module and accepts the connection request of the Bluetooth module of the co-pilot entertainment system. If not connected, the Bluetooth module of the central control entertainment system directly establishes a media audio transmission protocol connection with the Bluetooth module of the co-pilot entertainment system.

2. The method for wireless audio transmission of the co-pilot entertainment system based on Bluetooth according to claim 1, wherein During the active connection process in Step 2, the Bluetooth modules of the co-pilot entertainment system and the central control entertainment system verify the received Bluetooth name and VIN code to determine whether they correspond. If they do not correspond, continue to search for devices. If they correspond, perform pairing. Among them, the pairing includes the Bluetooth modules of the co-pilot entertainment system and the central control entertainment system recording the identity address information of each other and connecting the transmission protocol.

3. The method for audio lossless transmission of the co-pilot entertainment system based on Bluetooth according to claim 2, wherein After the active connection step in Step 2, further included is The Bluetooth module of the co-pilot entertainment system sends the obtained VIN code for identity verification through the SPP protocol. After passing the verification, it prompts that the Bluetooth modules of the co-pilot entertainment system and the central control entertainment system are paired successfully.

4. The Bluetooth-based audio sensorless transmission method for a passenger entertainment system according to claim 1 is characterized in that: After Step 4, further included is Step 5: The Bluetooth module of the central control entertainment system monitors the status of the transmitted audio stream and determines whether the Bluetooth module of the co-pilot entertainment system requests to play the audio stream of the co-pilot entertainment system. If there is no request to play, the central control entertainment system continues the current media state. If there is a request to play, the central control entertainment system determines whether there is currently media playing. If there is media playing, it automatically switches to the media source of the co-pilot entertainment system and continues to play. If there is no media playing, it directly plays the media of the co-pilot entertainment system.

5. The method for wireless audio transmission of the co-pilot entertainment system based on Bluetooth according to claim 4, wherein Before Step 1, it further includes determining whether the Bluetooth module of the co-pilot entertainment system is connected to the headset. If connected, the headset outputs audio.

6. The method for wireless audio transmission of the co-pilot entertainment system based on Bluetooth according to claim 2, wherein The identity address information includes the verified mac address information.

7. The method for audio seamless transmission of the co-pilot entertainment system based on Bluetooth according to claim 6, wherein the media audio transmission protocol includes A2DP.

8. The method for audio seamless transmission of the co-pilot entertainment system based on Bluetooth according to claim 7, wherein the naming includes the manufacturer code and the string of the VIN code.

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