Interaction device for vehicle cabin and vehicle

Abstract

The utility model relates to the field of vehicle cabins. Specifically, the utility model relates to an interaction device for a vehicle cabin and a vehicle comprising the interaction device. The interaction device comprises a main control module which comprises a system-on-chip, a first signal output interface and a vehicle-machine interaction interface; and the external expansion unit comprises a plurality of expansion interfaces and a negotiation unit. Wherein the first signal output interface is used for transmitting audio and video signals generated by the system-on-chip to the external expansion unit, the in-vehicle interaction interface is used for realizing connection between the main control module and the in-vehicle domain controller, and the negotiation unit is used for determining control parameters of the external equipment. And the external expansion unit is configured to convert the control parameter into a GPIO (General Purpose Input / Output) level signal and transmit the GPIO level signal to the system-on-chip.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of vehicle cabin. Specifically, the utility model relates to an interactive device for a vehicle cabin and a vehicle comprising the interactive device. BACKGROUND

[0002] With the rapid development of the new energy vehicle market, consumers' demand for cabin entertainment systems and intelligent functions is increasing. Although the new energy vehicles on the current market are equipped with certain entertainment and intelligent functions, there are still many deficiencies in cabin entertainment expansion and car machine computing power sharing.

[0003] Specifically, the existing cabin entertainment system is often limited by the computing power of the car machine chip (i.e., the car machine domain controller), and it is difficult to support high-load entertainment applications, resulting in poor user experience. At the same time, the car machine chip also needs to undertake key tasks such as vehicle control and driving assistance, and the computing power allocation is tight, further limiting the performance improvement of the entertainment system.

[0004] In addition, the existing cabin entertainment system uses a fixed installation method, and users cannot flexibly expand and upgrade according to their needs. With the rapid development of consumer-grade chip technology, its computing power is constantly improving, and the cost is gradually decreasing, but the existing car entertainment system is difficult to quickly follow up, and cannot fully utilize the latest technological achievements of consumer-grade chips.

[0005] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the present application, and therefore can include information that does not constitute prior art known to those of ordinary skill in the art. SUMMARY

[0006] To solve or at least alleviate one or more of the above problems, the following technical solutions are provided. The utility model provides an interactive device for a vehicle cabin and a vehicle comprising the interactive device, which can enhance the cabin entertainment expansion function and share the computing power pressure of the car machine domain controller.

[0007] According to a first aspect of the utility model, an interactive device for a vehicle cabin is provided, the interactive device comprising: a main control module comprising a system-on-chip, a first signal output interface, and a car machine interaction interface; an external expansion unit comprising a plurality of expansion interfaces and a negotiation unit. Wherein, the first signal output interface is used to transmit the audio and video signals generated by the system-on-chip to the external expansion unit, the car machine interaction interface is used to realize the connection between the main control module and the car machine domain controller, and the negotiation unit is used to determine the control parameters of the external device, and the external expansion unit is configured to convert the control parameters into GPIO level signals and transmit the GPIO level signals to the system-on-chip.

[0008] As an alternative or supplement to the above scheme, in the interactive device for a vehicle cabin according to an embodiment of the present application, the control parameters include one or more of the following: power supply parameters for the external device, input signal types of the external device, and insertion direction of the expansion interface.

[0009] As an alternative or supplement to the above scheme, in the interactive device for a vehicle cabin according to an embodiment of the present application, the system-level chip is configured to: generate multiple types of audio and video signals; and generate a first control signal based on the GPIO level signal, the first control signal being used to indicate the type of audio and video signal output by the master module.

[0010] As an alternative or supplement to the above scheme, in the interactive device for a vehicle cabin according to an embodiment of the present application, the audio and video signals generated by the system-level chip include any combination of the following types: display serial interface signals, display port signals, and universal serial bus signals.

[0011] As an alternative or supplement to the above scheme, in the interactive device for a vehicle cabin according to an embodiment of the present application, the master module further includes a signal switching unit connected between the system-level chip and the first signal output interface, the signal switching unit being configured to: receive multiple types of audio and video signals from the system-level chip and the first control signal; and determine the type of audio and video signal transmitted to the first signal output interface based on the first control signal.

[0012] As an alternative or supplement to the above scheme, in the interactive device for a vehicle cabin according to an embodiment of the present application, the master module further includes: a signal input interface for receiving externally incoming audio and video signals; and a first signal processing unit connected to the signal input interface, for separating the externally incoming audio and video signals into audio signals and image signals, and transmitting the image signals to the system-level chip.

[0013] As an alternative or supplement to the above scheme, in the interactive device for a vehicle cabin according to an embodiment of the present application, the master module further includes a digital signal processor connected between the first signal processing unit and the system-level chip, the digital signal processor being configured to: convert the audio signals separated by the first signal processing unit into a time-division multiplexing format using a sampling rate conversion mechanism, and transmit the converted signals to a time-division multiplexing interface of the system-level chip.

[0014] Alternatively or additionally to the above solutions, in the interactive device for a vehicle cabin according to an embodiment of the present application, the master control module further comprises: an automotive audio bus chip configured to forward the audio signal generated by the system-level chip to a car domain controller with low latency; and a digital signal processor connected between the automotive audio bus chip and the system-level chip, the digital signal processor being configured to implement master-slave mode matching between a time division multiplexing interface of the automotive audio bus chip and a time division multiplexing interface of the system-level chip.

[0015] Alternatively or additionally to the above solutions, in the interactive device for a vehicle cabin according to an embodiment of the present application, the master control module further comprises a second signal output interface configured to be directly connected to an external device.

[0016] Alternatively or additionally to the above solutions, in the interactive device for a vehicle cabin according to an embodiment of the present application, the master control module further comprises a micro control unit connected between the system-level chip and the car interaction interface, the micro control unit being configured to control the system-level chip based on a control signal or a car bus signal issued by a car domain controller.

[0017] According to a second aspect of the present application, a vehicle is provided with the interactive device for a vehicle cabin according to the first aspect of the present application.

[0018] The interactive device for a vehicle cabin according to one or more embodiments of the present application can enhance the cabin entertainment expansion function, while sharing the computing power pressure of the car domain controller. Specifically, by connecting the external expansion unit and the plurality of expansion interfaces, the user can connect a variety of entertainment devices (such as AR (Augmented Reality) glasses, screens, game consoles, etc.) to the cabin entertainment system, thereby greatly enriching the user's in-vehicle entertainment experience. In addition, since the system-level chip is provided in the interactive device, it can process part of the tasks that originally need to be completed by the car domain controller, thereby reducing the computing power pressure of the car domain controller and improving the operation efficiency and response speed of the entire vehicle cabin system. On the other hand, by converting the control parameters of the external device into a GPIO level signal, the interactive device avoids the reliability problems that may exist in the traditional interface (such as the I2C or UART interface commonly used by the negotiation unit) in the vehicle scene, further improving the reliability and stability of the in-vehicle entertainment experience. BRIEF DESCRIPTION OF DRAWINGS

[0019] The above and / or other aspects and advantages of the present application will become more apparent by describing in detail some embodiments thereof with reference to the attached drawings in which:

[0020] Figure 1 is a schematic block diagram of the interactive device 10 according to one or more embodiments of the present application;

[0021] Figure 2 is a schematic block diagram of the interactive device 20 according to one or more embodiments of the present application;

[0022] Figure 3 is a circuit schematic diagram of the interactive device 30 according to one or more embodiments of the present application;

[0023] Figure 4 is a schematic block diagram of the vehicle 40 according to one or more embodiments of the present application. DETAILED DESCRIPTION

[0024] In this specification, the present application is more fully described by reference to the accompanying drawings, in which the illustrative embodiments of the present application are shown. The present application may, however, be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the present application to those skilled in the art.

[0025] The terms such as "comprise" and "include" mean that the present application does not exclude the presence of other elements and steps not directly or explicitly stated in the specification and claims. The terms such as "first" and "second" do not mean the order of the elements in time, space, size, etc., but only distinguish the elements.

[0026] In the following, each exemplary embodiment according to the present application will be described in detail with reference to the accompanying drawings. Hereinafter, the present application will be described with reference to the accompanying drawings. Figure 1 , Figure 1 is a schematic block diagram of the interactive device 10 according to one or more embodiments of the present application.

[0027] As shown in Figure 1 , the interactive device 10 includes a master control module 110 and an external expansion unit 120.

[0028] The master control module 110 is the core part of the interactive device 10, responsible for data processing and control of the operation of the entire interactive device. The master control module 110 includes a SoC (System on Chip) 111, a first signal output interface 112, and a vehicle-machine interaction interface 113.

[0029] The SoC 111 is the brain of the master module 110, with strong data processing and computing power. Exemplarily, the SoC 111 can parse and process instructions and data from the car machine domain controller or external devices, car machine bus signals (such as CAN bus signals, LIN bus signals, etc.), and generate various types of audio and video signals, such as DP (DisplayPort) signals, USB (Universal Serial Bus) signals, and DSI (Display Serial Interface) signals. At the same time, the SoC 111 can also adjust the parameters of the output signals and the internal configuration of the interactive device 10 according to the control parameters transmitted by the external expansion unit 120, to meet the connection requirements of external devices. The first signal output interface 112 is a connection bridge between the SoC 111 and the external expansion unit 120. The first signal output interface 112 can transmit the audio and video signals generated by the SoC 111 to the external expansion unit 120 for use by external devices.

[0030] The car machine domain controller is a core component in the automotive electronic and electrical architecture, responsible for integrating and managing various functions of the vehicle infotainment system, such as navigation, music playback, video playback, vehicle information display, etc. The car machine interaction interface 113 is a connection channel between the interactive device 10 and the car machine domain controller, which is used to realize data communication and instruction transmission between the master module 110 and the car machine domain controller. Through the car machine interaction interface 113, the interactive device 10 can receive instructions and data from the car machine domain controller, such as user input instructions, vehicle status information, etc., and hand over these information to the SoC 111 for processing. At the same time, the interactive device 10 can also send processed audio and video signals and other data to the car machine domain controller through the car machine interaction interface 113 for further processing.

[0031] In a specific embodiment, the car machine interaction interface 113 is a TYPE-C interface, which can support USB (Universal Serial Bus) signal and DP (DisplayPort) signal transmission, that is, support data exchange using USB interface protocol and DP interface protocol. The DP interface protocol is mainly used for the transmission of high-definition video signals, thereby meeting the user's requirement for high-definition quality, while the USB interface protocol is mainly used for data transmission and exchange of control signals. Combined use of DP and USB interface protocols can ensure sufficient interaction bandwidth between the interactive device 10 and the car machine domain controller, thereby meeting the requirements of high-quality audio and video signal transmission and signal exchange.

[0032] Further, the arrangement of the internal components of the interaction device 10 can be optimized in consideration of the interior layout of the vehicle and the signal transmission efficiency. Specifically, since the vehicle machine domain controller is mostly fixedly arranged near the center console of the vehicle, in order to reduce the loss in the signal transmission process and improve the connection stability, the main control module 110 can also be arranged near the center console of the vehicle, so as to avoid signal attenuation and interference caused by excessively long lines. As the connection point between the interaction device 10 and the external device (for example, AR glasses, a screen, a game console, etc.), the external expansion unit 120 can be arranged in a place easily accessible by the rear seat users. In consideration of the comfort and convenience of the rear seat users, the external expansion unit 120 can be installed at a position on the side of the rear seat armrest for easy plugging and use.

[0033] The external expansion unit 120 includes a plurality of expansion interfaces 121 and a negotiation unit 122. The expansion interface 121 is a direct connection point between the interaction device 10 and the external device, that is, the expansion interface 121 is a visible and pluggable external interface for the user. In order to ensure the stability and ease of use of the connection, the expansion interface 121 can be a TYPE-C interface, which supports multiple connection modes such as DP OUT and USB, so as to meet the connection requirements of different types of external devices (for example, AR glasses, a screen, a game console, a computer, etc.). The negotiation unit 122 is used to determine the control parameters of the external device. In one example, the external expansion unit 120 has a function of charging externally, and in the charging scene, the negotiation unit 122 can determine the power supply parameters (for example, voltage, current and power) of the external device through negotiation, so as to ensure that the external device receives appropriate power supply and prevent device damage or performance degradation caused by voltage mismatch. In addition, the negotiation unit 122 can identify the input signal type supported by the external device, such as a DP signal or a USB signal, so as to improve the external compatibility of the external expansion unit 120. For example, if the external device is AR glasses or a screen, it may need to receive high-definition audio and video data through a DP signal. Further, the negotiation unit 122 can indirectly obtain information about the interface insertion direction through communication with the external device. For example, when the external device is inserted into the expansion interface 121, the negotiation unit 122 can detect and identify the type, configuration and required signal transmission direction of the device, which helps the SoC to determine the interface insertion direction (for example, normal insertion or reverse insertion) of the external device, so as to ensure correct communication between devices. Exemplarily, the negotiation unit 122 can be arranged in a PD (Power Delivery) chip in the expansion interface 121, and each negotiation unit 122 can be arranged with a PD chip.

[0034] As discussed above, the master module 110 is preferably arranged near the center console of the vehicle and the external expansion unit 120 is preferably arranged in a place easily accessible by the rear seat passengers of the vehicle, in consideration of the interior layout of the vehicle and the signal transmission efficiency. In actual arrangement, a long (e.g. 2 meters) wire harness is needed to connect the master module 110 and the external expansion unit 120. The conventional negotiation unit 122 (e.g. a PD chip) supports low-speed I2C or UART interface, which has the problem of insufficient reliability in long-distance transmission, especially in the vehicle environment, which is easily affected by electromagnetic interference or other factors. To improve the reliability of data transmission, the utility model proposes to use the form of GPIO (General Purpose Input / Output) level signal (i.e. high and low level) to deliver the negotiation result of the negotiation unit 122, i.e. the external expansion unit 120 converts the control parameters into GPIO level signals and transmits the GPIO level signals to the SoC 111. GPIO is a general digital input and output interface, which can transmit data by defining a specific set of signal patterns (e.g. GPIO truth table). Specifically, the external expansion unit 120 can convert the control parameters into GPIO level signals according to the corresponding relationship in the pre-defined GPIO truth table, and deliver the converted GPIO level signals to the first signal output interface 112 through the wire harness, and then the first signal output interface 112 transmits the GPIO level signals to the GPIO pin of the SoC 111. Using the form of GPIO level signal for signal transmission can reduce the dependence on communication lines and improve the anti-interference ability of the signal, thereby achieving more reliable data transmission in the vehicle environment.

[0035] Figure 2 and Figure 3 Other possible configurations of the interactive device are exemplified. Figure 2 A schematic block diagram of an interactive device 20 according to one or more embodiments of the utility model is shown.

[0036] As Figure 2 shown, the interactive device 20 includes a master module 210 and an external expansion unit 220. Similar to the interactive device 10 in Figure 1 , the master module 210 includes a SoC 211, a first signal output interface 212, and an in-vehicle infotainment interactive interface 213, and the external expansion unit 220 includes a plurality of expansion interfaces 221 and a negotiation unit 222. The master module 210, the external expansion unit 220, the SoC 211, the first signal output interface 212, the in-vehicle infotainment interactive interface 213, the expansion interfaces 221, and the negotiation unit 222 have similar configurations as the corresponding elements in Figure 1 , which will not be repeated here.

[0037] In particular, the master module 210 in the interaction device 20 can include a signal switching unit 214 (USB / DP Switch) connected between the SoC 211 and the first signal output interface 212. After the external expansion unit 220 transmits the control parameters of the external device to the SoC 211 in the form of a GPIO level signal, the SoC 211 determines the input signal type (e.g., DP signal or USB signal) supported by the external device according to a pre-set correspondence (e.g., the correspondence between the signal type and the GPIO level signal stored in a truth table), and generates a first control signal indicating the type of audio / video signal output by the first signal output interface 212. The SoC 211 transmits the generated audio / video signal of multiple types and the first control signal to the signal switching unit 214, so that the signal switching unit 214 determines the specific type of audio / video signal transmitted to the first signal output interface 112 based on the first control signal.

[0038] Alternatively, the master module 210 in the interaction device 20 can further include a signal input interface 215 and a first signal processing unit 216. The signal input interface 215 is used to be directly connected to an external device (such as a game console, a computer, a mobile phone, or other devices capable of outputting audio / video signals) to receive the incoming audio / video signals from the external device. Exemplarily, the signal input interface 215 can be a DP IN interface, or a TYPE-C interface supporting multiple connection modes such as DP IN and USB. After the audio / video signals are transmitted via the signal input interface 215, they are first sent to the first signal processing unit 216 for preliminary analysis. Exemplarily, the first signal processing unit 216 can separate the externally incoming audio / video signals into audio signals and image signals, and convert the image signals into a format more suitable for subsequent image processing and rendering by the SoC 211 during the separation process, for example, converting the incoming DP signals into CSI (Camera Serial Interface) signals. In addition, during the separation process, the first signal processing unit 216 can also convert the audio signals into I2S (Inter-IC Sound) format. Since most commonly used SoCs in practice only have TDM (Time Division Multiplexing) format audio interfaces, the format conversion of the audio signals can be performed with the aid of a DSP (Digital Signal Processor). Exemplarily, as shown in FIG. 2, the first signal processing unit 216 can include a CSI interface 2161, an I2S interface 2162, and a DSP 2163. The CSI interface 2161 is used to receive the image signals converted from the DP signals, and the I2S interface 2162 is used to receive the audio signals converted from the DP signals. The DSP 2163 is used to convert the audio signals received by the I2S interface 2162 into a format suitable for the SoC 211 to process and render. Figure 2As shown, the master module 210 further includes a DSP 217 connected between the first signal processing unit 216 and the SoC 211. The DSP 217 receives the audio signal (e.g., a 4 data I2S signal) separated by the first signal processing unit 216, and converts the audio signal into a TDM format using a SRC (Sample Rate Conversion) mechanism, and transmits to the TDM interface of the SoC 211.

[0039] Optionally, the interaction device 20 can also have an audio signal output function. Illustratively, the SoC 211 can transmit the audio signal generated thereby to the car domain controller for forwarding to the car speaker for playing. Specifically, the master module 210 in the interaction device 20 can further include an A2B (Automotive Audio Bus) chip 218. The A2B chip is a serial digital audio transmission chip specially designed for automotive audio applications, which can transmit high-quality audio signals over long distances while reducing electromagnetic interference and the number of cables. Specifically, the A2B chip 218 is arranged between the SoC 211 and the car interaction interface 213, for forwarding the audio signal generated by the SoC 211 (e.g., the audio signal output via the TDM audio output interface of the SoC 211) to the car domain controller with low latency via the car interaction interface 213. It should be noted that in practice, the TDM audio output interface of the SOC and the TDM audio input interface of the A2B chip both only support master mode. If both devices use master mode, they cannot directly communicate because one device needs to act as a master to control the communication process, and the other device needs to act as a slave to respond to the control of the master. To solve this problem, a DSP solution is introduced, i.e., the DSP is used as a bridge between the two master interfaces. Specifically, the TDM interface of the DSP is set to slave mode on both sides, so that it can be interconnected with the SOC and the A2B chip at the same time. In addition, SRC synchronization can be performed inside the DSP to ensure accurate transmission and synchronization of audio data. In the case of Figure 2 In the embodiment shown, the DSP that plays a role in matching the master-slave mode is the same as the DSP 217 introduced above. That is, the DSP 217 can be used to simultaneously implement the two functions of TDM double-master interconnection and I2S-to-TDM interface conversion.

[0040] Optionally, the main control module 210 in the interaction device 20 can further include a second signal output interface 219. Unlike the first signal output interface 212, the second signal output interface 219 is used to be directly connected to external devices, that is, an external interface visible to users and pluggable. As described above, the main control module 210 is generally arranged near the center console of the vehicle, and in order to facilitate the use of the front-row users of the vehicle, the second signal output interface 219 can be arranged near the center console and easily accessible to the front-row users of the vehicle. Similar to the expansion interface 221, the second signal output interface 219 can be a TYPE-C interface supporting multiple connection modes such as DP OUT and USB, thereby meeting the connection requirements of different types of external devices.

[0041] Optionally, the main control module 210 in the interaction device 20 can further include an MCU (Microcontroller Unit) 2110 connected between the SoC 211 and the vehicle-machine interaction interface 213. Exemplarily, the MCU 2110 can listen to the control signals issued by the vehicle domain controller in real time, and once the relevant instructions are received, the SoC 211 is immediately controlled accordingly (for example, power on and off, reset, hibernate and wake up, forced flashing). In addition, the MCU 2110 can also communicate with the vehicle bus and receive and process various vehicle bus signals (for example, CAN bus signals, LIN bus signals). These signals can involve vehicle status, driving mode, user preferences and other information, and the MCU 2110 can control the SoC 211 more finely based on the vehicle bus signals to meet the requirements in different scenarios. In addition, the MCU 2110 can also monitor the working state of the interaction device 20 in real time and transmit an alarm signal to the vehicle domain controller when an abnormality is found.

[0042] The following continues to refer to Figure 3 , Figure 3 a circuit schematic diagram of the interaction device 30 according to one or more embodiments of the present application.

[0043] As Figure 3As shown, the first signal output interface includes 4 TYPE-C interfaces, which are user-invisible interfaces J1, J2, J3, J4. Specifically, the SOC DP 2lane and SOC DP 4lane ports output DP 2lane and DP 4lane signals to the USB / DP Switch, respectively; the SOC DSI 0 and SOC DSI 1 ports both output DSI signals, which are converted into DP signals by a DSI-DP converter DDC and output to the USB / DP Switch. In addition, the USB / DP Switch switches the type of audio and video signals output to the extension BOX (i.e., an externally connected extension unit) by J1, J2, J3, J4 based on the first control signal. Correspondingly, the extension BOX includes 4 TYPE-C interfaces to externally connect AR glasses or a screen.

[0044] The second signal output interface includes 2 TYPE-C interfaces, which are user-visible interfaces J5, J6, for directly connecting external devices. As shown, J5 and J6 can respectively multiplex the output signals of J3 and J4.

[0045] The interactive device further includes a DP IN interface J7 for directly connecting external devices. When audio and video signals are transmitted via J7, they are first sent to the first signal processing unit SP-1. SP-1 separates the audio and video signals into I2S audio signals and CSI image signals, and transmits the CSI image signals to the SOC CSI port. In addition, SP-1 transmits the I2S audio signals to the DSP, which converts the I2S audio signals into TDM format using the SRC mechanism and transmits them to the SoC TDM IN port.

[0046] The TYPE-C interface J8 is a car machine interaction interface. The DSI signals output by the SOC DSI port are converted into DP signals by the second signal processing unit SP-2 and then sent to the car domain controller via J8. In addition, the I2S audio signals are output to the DSP via the SoC TDM OUT port (master mode) for mode matching, and then sent to the A2B chip (master mode) by the DSP. The A2B chip sends the audio signals to the car domain controller via J8, so that the car domain controller forwards them to the car machine speaker for playing.

[0047] The interaction device 10, 20, 30 according to one or more embodiments of the present application can enhance the cockpit entertainment expansion function, and share the computing power pressure of the car machine domain controller. Specifically, by connecting the external expansion unit and the plurality of expansion interfaces, the user can connect a variety of entertainment devices to the cockpit entertainment system, thereby enriching the in-vehicle entertainment experience. In addition, since the interaction device is built-in with SoC, it can process part of the tasks that originally need to be completed by the car machine domain controller, thereby reducing the computing power pressure of the car machine domain controller and improving the operation efficiency and response speed of the entire vehicle cockpit system. On the other hand, the interaction device transmits the control parameters of the external device in the form of GPIO level signal, avoiding the reliability problems that may exist in the traditional interface in the vehicle scene, and further improving the reliability and stability of the in-vehicle entertainment experience.

[0048] In addition, since the interaction device 10, 20, 30 can be independent of the car machine chip and easily disassembled and installed in the vehicle cockpit, it is convenient for subsequent hardware upgrade and software upgrade to quickly follow up the latest technical achievements of consumer-grade chips.

[0049] Figure 4 A schematic block diagram of a vehicle 40 according to one or more embodiments of the present application. The vehicle 40 is provided with any one of the aforementioned embodiments of the interaction device (for example, the interaction device 10, 20, 30). Exemplarily, the vehicle 40 can be an electric vehicle, including but not limited to a pure electric vehicle (BEV), a hybrid electric vehicle (HEV), a fuel cell vehicle (FCEV), etc.

[0050] The foregoing disclosure is not intended to limit the present disclosure to the precise forms or specific use areas disclosed. Therefore, it is envisaged that various alternative embodiments and / or modifications of the present disclosure are possible in view of the present disclosure, whether explicitly described or implied herein. Having thus described the embodiments of the present disclosure, those of ordinary skill in the art will recognize that changes can be made in form and detail without departing from the scope of the present disclosure. Therefore, the present disclosure is limited only by the claims.

Claims

1. An interaction device for a vehicle cabin, characterized in that, The interaction device comprises: a master module comprising: a system-on-chip; a first signal output interface for transmitting audio and video signals generated by the system-on-chip to an external expansion unit; a car-machine interaction interface for connecting the master module and a car-machine domain controller; an external expansion unit comprising: a plurality of expansion interfaces for connecting to external devices; a negotiation unit for determining control parameters of the external devices; wherein the external expansion unit is configured to convert the control parameters into GPIO level signals and transmit the GPIO level signals to the system-on-chip.

2. The interaction device for a vehicle cabin of claim 1, wherein, The control parameters include one or more of the following: power supply parameters for the external devices, input signal types of the external devices, insertion directions of the expansion interfaces.

3. The interaction device for a vehicle cabin of claim 1, wherein, The system-on-chip is configured to: generate multiple types of audio and video signals; and generate a first control signal based on the GPIO level signal, the first control signal being used to indicate the type of audio and video signals output by the master module.

4. The interaction device for a vehicle cabin of claim 3, wherein, The audio and video signals generated by the system-on-chip include any combination of the following types: display serial interface signals, display port signals, and universal serial bus signals.

5. The interaction device for a vehicle cabin of claim 3, wherein, The master module further comprises a signal switching unit connected between the system-on-chip and the first signal output interface, the signal switching unit being configured to: receive multiple types of audio and video signals from the system-on-chip and the first control signal; determine the type of audio and video signals transmitted to the first signal output interface based on the first control signal.

6. The interaction device for a vehicle cabin of claim 1, wherein, The master module further comprises: a signal input interface for receiving externally incoming audio and video signals; a first signal processing unit connected to the signal input interface for separating the externally incoming audio and video signals into audio signals and image signals, and transmitting the image signals to the system-on-chip.

7. The interaction device for a vehicle cabin of claim 6, wherein, The master module further comprises a digital signal processor connected between the first signal processing unit and the system-on-chip, the digital signal processor being configured to: convert the audio signals separated by the first signal processing unit into a time-division multiplexing format using a sampling rate conversion mechanism, and transmit the time-division multiplexing format to a time-division multiplexing interface of the system-on-chip.

8. The interaction device for a vehicle cabin of claim 1, wherein, The master module further comprises: an automotive audio bus chip for forwarding audio signals generated by the system-on-chip to the car-machine domain controller with low latency; and a digital signal processor connected between the automotive audio bus chip and the system-on-chip, the digital signal processor being used to implement master-slave mode matching between a time-division multiplexing interface of the automotive audio bus chip and a time-division multiplexing interface of the system-on-chip.

9. The interaction device for a vehicle cabin of claim 1, wherein, The master module further comprises a second signal output interface for directly connecting to external devices.

10. The interaction device for a vehicle cabin of claim 1, wherein, The master module further comprises a micro control unit connected between the system-on-chip and the car-machine interaction interface, the micro control unit being configured to: control the system-on-chip based on control signals or car-machine bus signals issued by the car-machine domain controller.

11. A vehicle characterized by comprising: An interaction device for a vehicle cabin as claimed in any one of claims 1-10.

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