HK1084079B - On-board audio-visual system - Google Patents

Description

Vehicle-mounted audio-visual system

Technical Field

The invention relates to an audio-visual system, in particular to a vehicle-mounted audio-visual system applied to a vehicle.

Background

Since the vehicle-mounted audio-visual system plays an active role in eliminating the journey and recreation of automobile drivers and is deeply welcomed by drivers, most automobiles are provided with the vehicle-mounted audio-visual systems such as vehicle-mounted radio recorders and vehicle-mounted televisions. The current vehicle-mounted audio-visual system generally comprises a controller, a data source and a playing device, wherein the controller, the data source and the playing device are connected together in a wired mode, the controller controls the data source and the playing device in a wired mode, and the controller generally comprises a key panel, a signal generator, an encoder and a wired signal transmitter; the data sources generally include: the system comprises a wired signal receiver, a decoder, a microcontroller, a memory, an encoder and a wired signal transmitter; the playback apparatus generally includes: wired signal receiver, decoder, microcontroller and player. In the vehicle-mounted audio-visual system in the prior art, after a certain function key on a key panel of a controller is pressed, a signal generator generates a corresponding signal, the signal is encoded by an encoder and then is sent out by a wired signal transmitter, wired signal receivers in a data source and a playing device receive the wired signal sent by the controller, and the wired signal is decoded by a decoder and then is transmitted to corresponding microprocessors for processing, so that the corresponding function control of the data source or the playing device is achieved. However, because the vehicle-mounted audio-visual system in the prior art is connected and controlled in a wired manner, the operation and control are inconvenient, and the flexibility of each equipment installation device of the vehicle-mounted audio-visual system is limited. In addition, the control panel of the existing audio-visual device connected in a wired manner is generally arranged at the right side of the steering wheel of the automobile, and if a driver driving the automobile wants to control the audio-visual device, the driver needs to vacate one hand from two hands holding the steering wheel to dial the control key.

In view of the above, a vehicle-mounted audiovisual system convenient to operate and control is provided.

Disclosure of Invention

The invention aims to provide a vehicle-mounted audio-visual system convenient to operate and control.

In order to achieve the above object, the present invention provides a vehicle-mounted audio-visual system, comprising a controller, a data source and a playing device; the controller is arranged on a steering wheel of the automobile and at least comprises a first signal generator; the data source at least comprises a first wireless signal receiver, a first microcontroller and a second signal transmitter; the controller sends wireless control signals to the data source, the first wireless receiver in the data source receives the wireless control signals and sends the wireless control signals to the first microcontroller for processing, and the second signal transmitter sends data signals and/or control signals to the playing device under the control of the first microcontroller.

In order to achieve the above object, another preferred embodiment of the present invention provides an in-vehicle audiovisual system, which includes a controller, a data source, and a playing device; the controller is arranged on the automobile steering wheel and controls the data source and/or the playing device in a wireless transmission mode, and the data source transmits data signals and/or control signals to the playing device in a wireless transmission mode.

Compared with the wired vehicle-mounted audio-visual system in the prior art, the vehicle-mounted audio-visual system controls the data source and the playing device in a wireless transmission mode by arranging the controller on the vehicle steering wheel, avoids the inconvenience caused by complicated wiring when the wired audio-visual device is installed, saves the space in the vehicle, greatly facilitates the operation of a driver by arranging the controller on the vehicle steering wheel, and enables the driver to keep the sight right ahead when the driver operates the vehicle-mounted audio-visual equipment. The system provided by the invention can make the placement and operation of each device of the vehicle-mounted audio-visual system more flexible.

FIG. 1 is a functional diagram of the wireless transmission control among the controller, data source and playing device in the vehicle audio-visual system according to the present invention;

fig. 2 is a partial schematic diagram of the operation of an embodiment of the vehicle audio-visual system of the present invention.

Drawings

Referring to fig. 1, a functional schematic diagram of a vehicle-mounted audio-visual system according to the present invention is shown, the vehicle-mounted audio-visual system according to the present invention includes a controller 00, a data source 01 and a playing device 02, the controller 00 is disposed on a steering wheel of an automobile, and the controller 00 controls the data source 01 in a wireless manner, so as to achieve the functions of playing or stopping the audio-visual device according to the present invention.

Detailed Description

The controller 00 can be a controller with a power supply, or a controller with a power supply supplied by an automobile; the device comprises a key panel 001, a signal generator 002, an encoder 003, a first microcontroller 006 and a signal transmitter 004, wherein the signal transmitter 004 is a wireless signal transmitter. The key panel 001 is located ON a steering wheel of an automobile to facilitate operation of an automobile driver, the key panel 001 is provided with a plurality of function keys to complete multiple function control of the vehicle-mounted audio-visual system, in the embodiment, the key panel 001 is provided with basic common function keys such as a wake-up key (ON), a sleep key (OFF), a PLAY key (PLAY), a pause key (STILL) and a STOP key (STOP), when a driver presses a certain function key ON the key panel 001, a signal generator 002 in the controller 00 generates a corresponding signal, then the signal is encoded by an encoder 003, the encoded signal is transmitted to the first microcontroller 006, the first microcontroller 006 processes according to the received signal to control the controller 00 and a signal transmitter 004, the signal transmitter 004 generates a corresponding signal under the control of the first microcontroller 006, and sent to the data source 01 or the playing device 02 in a wireless transmission manner.

The data source 01 at least comprises the following elements: a first signal transmitting/receiving unit 011, a first decoding/encoding unit 012, a second microcontroller 013, a memory unit 014; wherein the first signal transmission/reception unit 011 includes a signal receiver and a signal transmitter, and the first signal transmission/reception unit 011 is a wireless signal transmission/reception unit in this embodiment. The first decoding/encoding unit 012 and the microcontroller 013 can be integrated into a control chip as required. The data source in the vehicle-mounted audio-visual system of the invention can be wired, wireless, or fixed on the vehicle, or portable, the data source 01 includes but is not limited to one or more of CD device, VCD device, DVD device, EVD device, hard disk, mobile hard disk, semiconductor memory disk (such as flash disk), and the stored data can be audio, video, etc. The data source in this embodiment is a portable, mobile data source. When the controller 01 in the vehicle audio-visual system transmits a signal to the data source 01, the receiver in the first signal transmitting/receiving unit 011 in the data source 01 receives the wireless signal transmitted from the signal transmitter 004 in the controller 00, transmits the signal to the first decoding/encoding unit 012 to be decoded, and transmits the decoded signal to the second microcontroller 013, and the second microcontroller 013 processes the signal according to the received signal and controls the data source 01 and/or the first decoding/encoding unit 012. The code in the first decoding/encoding unit 012 is encoded, the encoded control signal is transmitted to the memory unit 014, the memory unit 014 transmits a corresponding data signal to the first decoding/encoding unit 012 according to the received control signal, and finally, the first decoding/encoding unit 012 encodes the received data signal and the control signal transmitted by the second microcontroller 013 and transmits the encoded data signal and the control signal to the transmitter in the first signal transmitting/receiving unit 011.

The data source 01 of the present invention may be a data source with its own power source, such as a battery, or a data source supplied by a power source in an automobile.

The playing device 02 may be a pure audio player, such as a sound box or a car audio playing system, or may be a player combining audio and video, including various display devices, such as a television. The playing device 02 in the vehicle-mounted audio-visual system can be a playing device which is integrated into the data source 01 or is separated from the data source 01 and is controlled by a wire, and a signal transmitter in the data source 01 is required to be a wire signal transmitter so as to carry out wire signal or data transmission with the wire playing device; the playback device 02 may also be a wirelessly controlled playback device incorporated into the data source 01 or separate from the data source 01, such as a multimedia or radio playback device carried by the vehicle itself.

In this embodiment, the playback device 02 is a wireless-controlled playback device separated from the data source 01, and the two devices transmit wireless signals therebetween, and the playback device 02 at least includes the following components: a second signal transmission/reception unit 021, a second decoding/encoding unit 022, a third microcontroller 023, and a player 024, wherein the second signal transmission/reception unit 021 includes a signal transmitter and a signal receiver, and the second decoding/encoding unit 022 includes a decoder and an encoder; in this embodiment, the second signal transmitting/receiving unit 021 is a wireless signal transmitting/receiving unit; the signal receiver in the second signal transmitting/receiving unit 021 in the playing device 02 receives the wireless control signal sent by the signal transmitter 004 of the controller 00 or the data signal or the wireless control signal sent by the transmitter in the first signal transmitting/receiving unit 011 of the data source 01, the wireless control signal or the data signal is decoded by the decoder in the second decoding/encoding unit 022 in the playing device 02 and then transmitted to the third microcontroller 023 of the playing device 02, and the third microcontroller 023 processes the received signal and correspondingly controls the playing device 02 and/or the player 024. It is to be understood that the second decoding/encoding unit 022 and the third microcontroller 023 may be concentrated in one chip.

It can be understood that, in the present invention, the playing device 02 receives the control signal from the controller 00, and the playing device 02 transmits the control signal to the signal transmitting/receiving unit 011 of the data source 01 through the signal transmitting/receiving unit 021, and the control manner further includes: the second microcontroller 013 of the data source 01 processes the received wireless control signal sent by the controller 00, and further controls the data source 01 to send a corresponding data signal and/or control command signal to the playback device 02, and the third microcontroller 023 of the playback device 02 processes the received data signal and/or control command signal sent by the data source 01, and controls the playback device 02 to generate a control command corresponding to the controller 00.

It can be understood that the playing device of the present invention can receive the control signal sent by the controller through the signal receiver in the second signal transmitting/receiving unit 021, and directly obtain the data signal from the data source through the processing control of the microcontroller therein.

The control method of the vehicle-mounted audio-visual system is completed in a wireless transmission mode and comprises the following basic control steps:

1) the key panel 001 of the controller 00 receives an instruction sent from the outside, that is, a function key on the key panel 001 is pressed;

2) signal generator 002 in controller 00 generates a corresponding control signal;

3) the encoder 003 in the controller 00 encodes the received control signal and transmits it to the first microcontroller 006;

4) the first microcontroller 006 processes the encoded control signal received by it, and controls the controller 00 and/or the signal transmitter 004;

5) the signal transmitter 004 transmits a wireless transmission control signal;

6) a first signal transmitting/receiving unit 011 in the data source 01 receives the wireless signal transmitted from the controller 00, and the signal is decoded and transmitted to a second microcontroller 013 in the data source 01 by a first decoding/encoding unit 012;

7) the second microcontroller 013 processes the received wireless signal accordingly and generates corresponding control commands for the data source 01 and/or the first decoding/encoding unit 012;

8) the first decoding/encoding unit 012 encodes the received control instruction transmitted from the second microcontroller 013, and transmits the encoded control instruction to the memory unit 014;

9) the storage unit 014 transmits the corresponding data signal to the first decoding/encoding unit 012;

10) the first decoding/encoding unit 012 encodes/decodes the received data signal and/or control signal, and transmits the encoded/decoded data signal and/or control signal to the first signal transmitting/receiving unit 011;

11) control of the playback device 02; in this embodiment, the playback device 02 is controlled wirelessly in the following manner: a second signal sending/receiving unit 021 in the playing device 02 receives the wireless control signal sent by the controller 00 and/or the wireless data signal and/or the wireless control signal sent by the data source 01, and the wireless control signal and/or the wireless data signal are decoded and the like by a second decoding/encoding unit 022 and then are transmitted to a third microcontroller 023 in the playing device 02;

12) the third microcontroller 023 processes the signals received by the third microcontroller 023 and generates corresponding control instructions to the playing device 02 and/or the player 024.

It can be understood that the playing device 02 in the present invention can be controlled by wire, and the control method is as follows: the second microcontroller 013 of the data source 01 performs corresponding processing according to the received wireless control signal sent by the controller 00, controls the data source 01 to send a wired control signal and/or a data signal, and transmits the wired control signal and/or the data signal to the playing device 02 in a wired manner, and the third microcontroller 023 in the playing device 02 performs processing on the wired control signal and/or the wired data signal received by the third microcontroller 023, and further controls the playing device 02 to generate a corresponding control instruction.

The following describes in detail the operation and control method of each function wirelessly transmitted by the controller 00, the data source 01, and the playback device 02 in the vehicle-mounted audio-visual system according to the present invention:

when a driver wants to wake up the vehicle-mounted audio-visual system in a sleep state, the driver only needs to press a wake-up key on a key panel 001 of the controller 00 on the steering wheel of the automobile, at the moment, a signal generator 002 in the controller 00 generates a corresponding signal, the signal is encoded by an encoder 003, the encoded control signal is transmitted to the first microcontroller 006 for processing, then the microcontroller 006 generates corresponding control on the controller 00 and/or a signal transmitter 004, and the signal transmitter 004 transmits the control signal transmitted by the microcontroller 006 in a wireless transmission mode. The sending mode of wireless transmission can be selected from wireless transmission modes such as Bluetooth (Bluetooth), short-range wireless communication standard (ZIGBEE) or ultra-wideband (UWB).

After receiving the wireless wake-up signal sent by the controller 00, the first signal sending/receiving unit 011 in the data source 01 sends the signal to the first decoding/encoding unit 012, and the signal decoded by the first decoding/encoding unit 012 is transmitted to the second microcontroller 013, and the second microcontroller 013 performs corresponding processing according to the signal, thereby completing the wake-up operation of the data source 01, even if the power supply of the data source 01 is in an on state.

The second signal transmitting/receiving unit 021 of the playback device 02 receives the wireless wake-up signal sent by the controller 00, then transmits the signal to the second decoding/encoding unit 022 for decoding, the signal decoded by the second decoding/encoding unit 022 is transmitted to the third microcontroller 023, and the third microcontroller 023 performs corresponding processing according to the signal, thereby completing the wake-up operation of the playback device 02 even if the power supply of the playback device 02 is in an on state.

After the driver presses the wake-up key on the key panel 001 of the controller 00, the controller 00 controls the data source 01 and the playing device 02 to be in the wake-up state from the sleep state in a wireless transmission control mode, in this state, when the driver presses the playing key on the key panel 001, the signal generator 002 in the controller 00 generates a corresponding playing signal, then the signal is encoded in a wireless mode by the encoder 003, finally the playing signal is sent to the data source 01 and the playing device 02 in a wireless transmission mode by the signal transmitter 004, and the transmission mode can correspondingly select a wireless transmission mode such as bluetooth, ZIGBEE or UWB.

After receiving a wireless broadcast signal sent by the controller 00, a first signal sending/receiving unit 011 in the data source 01 sends the broadcast signal to a first decoding/encoding unit 012 for decoding, the decoded broadcast signal is processed by a second microcontroller 013 in the data source 01, the second microcontroller 013 sends an address signal and a control signal obtained after corresponding processing to the first decoding/encoding unit 012 in the data source 01 for encoding, the first decoding/encoding unit 012 sends the encoded signal to a storage unit 014, if the broadcast signal defaults to play a first song signal, the storage unit 014 sends a corresponding data signal to the first decoding/encoding unit 012 according to the received signal, the first decoding/encoding unit 012 encodes a control command signal sent by the second microcontroller 013 and a data signal sent by the storage module 014, finally, the first signal transmitting/receiving unit 011 transmits the encoded data signal and control signal to the playback device 02 in a wireless transmission manner. In this embodiment, the playback device 02 is separated from the data source 01 and controlled by a wireless transmission method, so the data source 01 can transmit a signal to the playback device 02 by using a wireless transmission method such as bluetooth, ZIGBEE, or UWB.

The second signal sending/receiving unit 021 of the playing device 02 receives the wireless data signal and the wireless control signal sent by the data source 01, the wireless data signal and the wireless control signal are decoded by the second decoding/encoding unit 022 and then transmitted to the third microcontroller 023, and the third microcontroller 023 converts the data signal from a digital form into an analog form and transmits the analog form to the player 024, thereby realizing voice or voice and image playing. If the data source 01 sends image data, the image data can be directly transmitted to the player 024 without being converted into an analog signal.

If the storage module 014 is a video compact disc (V-CD), the player 024 is a television, and a data stream signal in a real-time video decoding (MPEG-I) format and other control signals are stored on the V-CD disc encoded by the second decoding/encoding unit 012 of the data source 01 and transmitted to the third microcontroller 023 in the playback device 02 via wireless transmission. The third microcontroller 023 processes the signal and divides it into two paths, one path is an MPEG-I audio stream, and the third microcontroller 023 performs audio decoding on it to solve the stereo audio signal and amplify it to the television. The other MPEG-I video stream is processed by video decoding, video digital/analog (D/A) conversion, NTSC/PAL coding to form full television signal and sent to the television, or directly output three primary colors (RGB) signal to the monitor without NTS/PAL encoder.

When the driver presses the pause key on the key panel 001, the controller 01 sends out the pause signal in a wireless transmission mode, and the generation and control principle of the pause signal is the same as the control principle of pressing the function keys such as the wake-up key or the play key.

After receiving the wireless pause signal from the controller 00, the first signal transmitting/receiving unit 011 in the data source 01 transmits the signal to the first decoding/encoding unit 012, and the signal decoded by the first decoding/encoding unit 012 is transmitted to the second microcontroller 013 for processing, thereby finally realizing the pause operation of the data source 01.

After receiving the wireless pause signal from the controller 00, the second signal transmitter/receiver 021 in the playback device 02 transmits the signal to the second decoder/encoder 022, and the signal decoded by the second decoder/encoder 022 is processed by the third microcontroller 023, so as to finally realize the pause operation of the playback device 02.

When the driver presses the stop key on the key panel 001, the controller 01 transmits the stop signal in a wireless transmission manner, and the generation and control principle thereof is the same as the control principle of pressing the function key such as the wake-up key or the play key.

After receiving the wireless stop signal from the controller 00, the first signal transmitting/receiving unit 011 in the data source 01 transmits the signal to the first decoding/encoding unit 012, and the signal decoded by the first decoding/encoding unit 012 is transmitted to the second microcontroller 013 for processing, thereby finally realizing the stop operation of the data source 01.

After receiving the wireless stop signal sent by the controller 00, the second signal sending/receiving unit 021 in the playback device 02 transmits the signal to the second decoding/encoding unit 022, and the signal decoded by the second decoding/encoding unit 022 is processed by the third microcontroller 023, so that the stop operation of the playback device 02 is finally realized.

When the driver presses the sleep key on the key panel, the controller 01 sends the sleep signal in a wireless transmission mode, and the generation and control principle of the sleep signal is the same as the control principle of pressing a function key such as a wake-up key or a play key.

After receiving the wireless sleep signal sent by the controller 00, the first signal sending/receiving unit 011 in the data source 01 sends the sleep signal to the first decoding/encoding unit 012, the signal decoded by the first decoding/encoding unit 012 is sent to the second microcontroller 013, and the second microcontroller 013 performs corresponding processing according to the received signal, thereby completing the sleep operation of the data source 01.

After the second signal transmitting/receiving unit 021 in the playing device 02 receives the wireless sleep signal sent by the controller 00, the sleep signal is transmitted to the second decoding/encoding unit 022 for decoding, the signal decoded by the second decoding/encoding unit 022 is transmitted to the third microcontroller 023, and the third microcontroller 023 performs corresponding processing according to the received signal, thereby completing the sleep operation of the playing device 02.

It can be understood that the key panel of the vehicle-mounted audio-visual system of the invention can also be provided with other function keys, such as a fast forward key, a fast reverse key, a return key and the like, and the working process of the key panel is basically the same as that of the function keys such as a play key or a pause key and the like.

The following illustrates the working process of wireless transmission control among the controller 00, the data source 01 and the playing device 02 of the vehicle-mounted audio-visual system according to the present invention by means of bluetooth wireless transmission:

the encoder 003 and the signal transmitter 004 in the controller 00 are provided as a first bluetooth module, (described later in detail), the first signal transmission/reception unit 011 and the first decoding/encoding unit 012 in the data source 01 are a second bluetooth module, while the second signal transmission/reception unit 021 and the second decoding/encoding unit 022 in the playback apparatus 02 are provided as a third bluetooth module in order to enable the data source 01 to control the player 02 in a wireless controlled manner as well.

As shown in fig. 2, a bluetooth module generally includes the following parts: a baseband controller 051, an electrically erasable read-only memory (EEPROM)052, a modem 053, a receiver 054, a transmitter 055, a transceiver controller 056, and an antenna filter 057.

The eeprom 052 is used to store bluetooth firmware (not shown) and can exchange data, address and control signals with the baseband controller 051. The bluetooth firmware includes a link manager (not shown) and a Host Control Interface (HCI) (not shown). The link manager implements the Link Management Protocol (LMP), which is responsible for handling the underlying link control. Each bluetooth device may communicate point-to-point with a link manager of another bluetooth device via the LMP. The HCI provides the host with a command interface to access the baseband controller 051, the link manager, and the hardware status and control registers. The host controls the Bluetooth interface through a series of commands provided by the HCI driver; after the HCI of the bluetooth firmware receives the command, an event is generated and returned to the host to indicate the state change of the interface.

The baseband controller 051 is responsible for processing the link layer functions of the bottom layer, such as the selection of a frequency modulation sequence and the like, and realizes the data exchange between the host and the Bluetooth module.

In this embodiment, the wireless control of the vehicle-mounted audiovisual system of the present invention is mainly described by taking data transmission between the controller 00 and the data source 01 as an example.

Controller 00 is set to be the master and data source 01 is the slave. When a function key such as an awake key is pressed on the control panel 001, the master controller 00 enters an awake mode, the signal generator 002 generates a corresponding awake signal and transmits the awake signal to a bluetooth module in the controller 00 in a certain form, the baseband controller 051 in the bluetooth module receives the awake signal, and then the signal is modulated by the modem 053 in a manner of amplitude keying (ASK), Frequency Shift Keying (FSK), Phase Shift Keying (PSK) and the like, the modulated signal is transmitted to the transceiver controller 056 through the transmitter 055, the transceiver controller 056 coordinates the transmission and reception of the signal, and finally the signal is transmitted out through the antenna filter 057. The second bluetooth module of the data source 01 receives the wireless wake-up signal sent from the controller 00 and responds to the signal accordingly, if the data source 01 is powered on and in a sleep state, after receiving the wireless signal, the noise signal is filtered by an antenna filter in the bluetooth module, the signal reaches a modem through a transceiver controller and a receiver, the signal is separated from a carrier wave after demodulation, and then the signal is transmitted to the second microcontroller 013 in the data source 01 through a baseband controller, and the second microcontroller 013 processes the signal to wake-up the data source 01.

The playing device 02 and the data source 01 receive the wireless wake-up signal sent by the controller 00 at the same time, and the working principle is the same as that of the data source 01 receiving the wireless wake-up signal sent by the controller 00.

When other function keys such as a play key, a pause key, a stop key or a sleep key are pressed, the working principle of wireless signal control among the controller 00, the data source 01 and the playing device 02 in the vehicle-mounted audio-visual system is basically the same as that of wireless signal control when a wake-up key is pressed.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be construed as the protection scope of the present invention.

Claims (4)

1. A vehicle-mounted audio-visual system comprises a controller, a data source and a playing device; the controller is arranged on a steering wheel of the automobile and at least comprises a signal transmitter; the data source at least comprises a first signal sending/receiving unit, a second microcontroller and a storage unit; the playing device at least comprises a second signal sending/receiving unit; the method is characterized in that: the signal transmitter of the controller is a wireless transmitter; the first signal transmitting/receiving unit of the data source is a wireless signal transmitting/receiving unit; the second signal transmitting/receiving unit of the playing device is a wireless signal transmitting/receiving unit; the controller sends a wireless control signal to a data source, and a first signal sending/receiving unit in the data source receives the wireless control signal and sends the signal to a second microcontroller for processing; the first signal sending/receiving unit sends the coded data signal and/or the coded control signal to the playing device under the control of a second microcontroller;

the playing device receives the data signal and/or the control signal through a second signal sending/receiving unit;

wherein the data source further comprises a first decoding/encoding unit, and the playing device comprises a second decoding/encoding unit and a third microcontroller;

the first decoding/encoding unit decodes the wireless wake-up signal sent by the controller and transmits the wireless wake-up signal to the second microcontroller, and the second microcontroller executes wake-up operation of the data source according to the decoded wireless wake-up signal;

the second decoding/encoding unit decodes the wireless wake-up signal sent by the controller and transmits the wireless wake-up signal to the third microcontroller, and the third microcontroller executes the wake-up operation of the playing device according to the decoded wireless wake-up signal.

2. An in-vehicle audio-visual system according to claim 1, characterized in that: the second signal transmitting/receiving unit of the playing device is also used for receiving the wireless control signal transmitted by the signal transmitter in the controller.

3. An in-vehicle audio-visual system according to any one of claims 1 to 2, characterized in that: the data source adopts a portable storage medium to store data signals.

4. An in-vehicle audio-visual system according to any one of claims 1 to 2, characterized in that: the controller further comprises a key panel, a signal generator and an encoder; the key panel receives an external control instruction, the signal generator generates a control signal corresponding to the external control instruction, and the encoder encodes and transmits the control signal to the signal transmitter.