CN113619592B - Method, equipment and system for adjusting playing state of vehicle multimedia equipment - Google Patents

Abstract

The present invention provides a method, device and system for adjusting the playing state of a vehicle multimedia device, including: determining that the vehicle is in a driving state; judging whether the multimedia device in the vehicle is playing; when the multimedia device is playing, acquiring the The position information of the driver's head in the driving position, and the position information of the multimedia device being played in the vehicle; based on the position information of the head and the position information of the multimedia device, determine whether the audio played by the multimedia device or Whether the video interferes with the driver; if so, adjust the multimedia device so that the driver cannot obtain the audio or video. The present invention dynamically adjusts the multimedia equipment so that the driver cannot obtain the entertainment multimedia information in the multimedia equipment, reduces the interference of the entertainment multimedia information to the driver, and effectively improves driving safety.

Description

A method, device and system for adjusting the playing state of vehicle multimedia equipment

technical field

The invention relates to the technical field of vehicle driving, in particular to a method, device and system for adjusting the playback state of vehicle multimedia equipment.

Background technique

Existing car cockpits have rich entertainment systems, including screens that play streaming media such as movies and corresponding audio systems, but when driving, entertainment multimedia information will interfere with the driver and cause safety hazards; at the same time, entertainment The system and the assisted driving system will multiplex the screen and audio system, and the two often seize screen and audio resources, reducing driving safety and the driving experience of the occupants.

Contents of the invention

In view of this, the present invention provides a method, device and system for adjusting the playing state of vehicle multimedia equipment, which are used to solve the above-mentioned problem that entertainment multimedia information distracts the driver during driving.

In order to solve the problems of the technologies described above, the present invention adopts the following technical solutions:

The method for adjusting the playback state of a vehicle multimedia device according to an embodiment of the present invention is applied to a vehicle-machine terminal, and the method includes:

Make sure the vehicle is in driving state;

Judging whether the multimedia device in the vehicle is playing;

When the multimedia device is playing, acquire the position information of the driver's head in the main driving position, and the position information of the multimedia device being played in the vehicle;

Based on the position information of the head and the position information of the multimedia device, determine whether the audio or video played by the multimedia device interferes with the driver;

If there is interference, the multimedia device is adjusted so that the driver cannot obtain the audio or video.

Further, determining that the vehicle is in a driving state includes:

Acquiring the speed of the vehicle, and judging whether the speed of the vehicle is zero;

When the vehicle speed is not zero, it is determined that the vehicle is in a driving state;

When it is judged that the vehicle speed is zero, it is judged whether the vehicle is in a safe position;

If it is not in a safe position, it is judged that the vehicle is in a driving state.

Further, it also includes: when the multimedia device does not play audio or video that interferes with driving, not adjusting the multimedia device.

Further, if the audio played by the multimedia device interferes with the driver, adjust the audio device so that the driver cannot obtain the audio or video, wherein adjusting the audio device includes:

Mute the headrest sound located in the main driving area where the driver is located, and/or suppress the audio from the audio equipment in the main driving area through the audio emitted by multiple other audio devices in the car.

Furthermore, if the video played by the multimedia device interferes with the driver, adjust the screen of the video device so that the driver cannot obtain the audio or video, wherein adjusting the screen of the video device includes:

According to the position information of the driver's head, the video equipment on the side close to the driver's head is turned off and/or the voltage of the screen is adjusted to distort the color of the screen.

Another embodiment of the present invention also provides a car machine for adjusting the playing state of a vehicle multimedia device, including:

A driving state determining module, configured to determine that the vehicle is in a driving state;

A multimedia detection module, used to determine whether the multimedia device in the vehicle is playing;

The position detection module is used to detect the position information of the driver's head and the position information of the multimedia device when the multimedia device is playing;

A judging module, configured to judge whether the audio or video played by the multimedia device interferes with the driver based on the position information of the head and the position information of the multimedia device;

The device adjustment module is configured to adjust the multimedia device so that the driver cannot obtain the audio or video when it is judged that the audio or video played by the multimedia device interferes with the driver.

Further, the multimedia device includes an audio device and/or a video device, the audio device includes one or more of in-car audio, headrest audio, etc., and the video device includes one of a central screen and a passenger screen or more.

Furthermore, the driving state determination module is used for:

Acquiring the speed of the vehicle, and judging whether the speed of the vehicle is zero;

When the vehicle speed is not zero, it is determined that the vehicle is in a driving state;

When it is judged that the vehicle speed is zero, it is judged whether the vehicle is in a safe position;

If it is not in a safe position, it is judged that the vehicle is in a driving state.

Further, the equipment adjustment module is used for:

The audio played by the multimedia device interferes with the driver, and the audio device is adjusted so that the driver cannot obtain the audio, wherein the adjustment of the audio device includes:

Mute the headrest sound located in the main driving area where the driver is located, and/or suppress the audio from the audio equipment in the main driving area through the audio emitted by multiple other audio devices in the car.

Furthermore, the device adjustment module is configured to: the video played by the multimedia device interferes with the driver, adjust the screen of the video device so that the driver cannot obtain the video, wherein the adjustment of the video device screens, including:

According to the position information of the driver's head, the video equipment on the side close to the driver's head is turned off and/or the voltage of the screen is adjusted to distort the color of the screen.

Another embodiment of the present invention also provides a system for adjusting the playback status of vehicle multimedia equipment, including:

The locomotive, the locomotive is the locomotive described in the previous embodiment;

A sensor, the sensor is connected to the vehicle and used to collect vehicle driving information.

The technical solution of the present invention has at least one of the following beneficial effects:

1. The method of the embodiment of the present invention, by adjusting the multimedia equipment when the vehicle is driving, the driver cannot obtain the entertainment multimedia information, effectively improving the driving safety;

2. The method of the embodiment of the present invention makes the driver unable to obtain entertainment multimedia information while driving, and the multimedia device can normally play the auxiliary driving information, which further improves the safety of driving;

3. The method of the embodiment of the present invention prevents the driver from obtaining entertaining multimedia information while driving, and does not affect the entertainment experience of other occupants in the vehicle, effectively improving the riding experience of the entourage in the vehicle.

Description of drawings

1 is a schematic structural diagram of a system for adjusting the playing state of a vehicle multimedia device according to an embodiment of the present invention;

FIG. 2 is a flow chart of a method for adjusting the playing state of a vehicle multimedia device according to an embodiment of the present invention;

Fig. 3 is a schematic diagram of the implementation of the method for adjusting the playing state of the vehicle multimedia device according to the embodiment of the present invention;

4 is a schematic structural diagram of a car machine for adjusting the playing state of a vehicle multimedia device according to an embodiment of the present invention;

Fig. 5 is a system SoC block diagram for adjusting the playback state of a vehicle multimedia device according to an embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

It will be appreciated that, as used herein, the term "module" may refer to or include an Application Specific Integrated Circuit (ASIC), an electronic circuit, a processor (shared, dedicated, or group ) and/or memories, combinational logic circuits, and/or other suitable hardware components that provide the described functionality, or may be part of these hardware components.

Existing car cockpits have rich entertainment systems, including screens that play streaming media such as movies and corresponding audio systems. Entertainment multimedia information will interfere with the driver while driving, leaving a safety hazard. The invention adopts a method for adjusting the playing state of the multimedia equipment of the vehicle, so that the driver cannot obtain the entertaining multimedia information during the driving process, thereby ensuring the driving safety of the vehicle.

Referring to FIG. 1 , FIG. 1 is a schematic structural diagram of a system for adjusting the playback state of a vehicle multimedia device according to an embodiment of the present invention. The method, device and system of the embodiments of the present invention are implemented on the vehicle-machine terminal of the vehicle. As shown in FIG. 1 , the structural diagram includes an in-vehicle terminal 110 , a plurality of sensors 120 and a multimedia device 130 .

Specifically, when the car-machine terminal 110 plays a multimedia file through the multimedia device 130, the car-machine terminal 110 judges whether the vehicle is in a driving state according to the information of the sensor 120. Interfering with driving, the multimedia device 130 is therefore adjusted so that the driver cannot obtain multimedia information.

More specifically, the sensor can be one or more of a vehicle speed sensor, a position sensor, and a surrounding vehicle detection sensor. The vehicle-machine terminal 110 will obtain the vehicle speed from the sensor 120 and determine whether the vehicle speed is zero. , the car-machine terminal 110 judges that the vehicle is in a driving state. At this time, if the driver can obtain entertainment multimedia information, it will affect driving safety, so the multimedia device 130 will be adjusted; Whether it is in a safe position, when not in a safe position, such as far away from the roadside, parking lot, etc., if the driver can obtain entertainment multimedia information at this time, it will affect driving safety, so the car-machine terminal 110 adjusts the multimedia device 130 . At the same time, since the assisted driving information and multimedia information share the multimedia device 130, the vehicle-machine terminal 110 will dynamically adjust the multimedia device 130 according to whether the assisted driving information is being played, thereby ensuring driving safety and improving driving safety. Of course, in specific implementation, other sensors can be added according to the plan to further improve the protection performance.

A method for adjusting the playing state of a vehicle multimedia device according to an embodiment of the present invention will be described in detail below in conjunction with FIG. 2 .

The method for adjusting the playing state of a vehicle multimedia device according to an embodiment of the present invention is applied to a vehicle-machine terminal.

As shown in Figure 2, according to the flow chart of adjusting the playing state of the vehicle multimedia equipment, the flow chart includes S210-S250, and several steps are described in detail below:

S210, the vehicle-machine terminal determines that the vehicle is in a driving state.

Specifically, before the car-machine terminal plays multimedia files, it is necessary to determine whether the vehicle is in a driving state. More specifically, the car-machine terminal obtains the vehicle speed and judges whether the vehicle speed is zero; The terminal judges that the vehicle is in the driving state. At this time, if the driver can obtain entertainment multimedia information, it will affect driving safety. When the car-machine terminal judges that the vehicle speed is zero, the car-machine terminal judges whether the vehicle is in a safe position. For example, the car-machine terminal can judge the surrounding traffic flow and the speed of surrounding vehicles through the external camera. If the traffic flow and vehicle speed are greater than the safe value , the car-machine terminal judges that the vehicle is not in a safe position, otherwise it judges that the vehicle is in a safe position; if it is in a safe position, the car-machine terminal judges that the vehicle is not in a driving state; if it is not in a safe position, the car-machine terminal judges that the vehicle is in a driving state. When the vehicle is driving, the driver should focus on driving.

S220, the vehicle-machine terminal determines whether the vehicle multimedia device plays.

Specifically, the multimedia equipment may include audio equipment and/or video equipment, the audio equipment may include equipment such as in-car audio, headrest audio, and the video equipment may include a central screen, a passenger screen, and a rear seat entertainment screen. It is worth noting that with the development of smart cars, the number of screens in smart cars will increase with demand. Here, only the above three screens are used as examples.

S230. When the multimedia device is playing, the vehicle-machine terminal acquires the driver's head position information and the multimedia device position information.

Specifically, the vehicle-machine terminal captures face information through in-vehicle sensors with built-in face recognition algorithms such as Eigenface and LBP to determine the spatial position of the driver's head. Further, the vehicle-machine terminal can confirm the position of the driver's eyes and The spatial position of the ear. This provides the basis for suppressing the sound in the driver's area and making the screen contents invisible to the driver.

S240, the car-machine terminal judges whether the audio or video played by the multimedia interferes with driving.

Specifically, when the multimedia device does not play audio or video that interferes with driving, the car-machine terminal judges not to adjust the multimedia device, and when the multimedia device plays audio or video that interferes with driving, the car-machine terminal judges to adjust the multimedia device.

More specifically, the car-machine terminal will dynamically judge the playback content of the vehicle's multimedia equipment, and will distinguish the playback content into assisted driving content and entertainment content. When the multimedia device plays assisted driving content, such as navigation screens and road condition information, the car-machine terminal No adjustments are made to the multimedia equipment. When the multimedia equipment plays entertainment content, the car-machine terminal will adjust the multimedia equipment.

S250, if there is interference, the vehicle-machine terminal adjusts the multimedia equipment.

Specifically, the car-machine terminal can mute the headrest audio in the audio device, and/or, the car-machine terminal uses multiple in-car audio to suppress the in-car audio in the main driving area, so that the driver cannot obtain entertainment audio.

More specifically, when the driver plays audio through the headrest audio, the adjustment is completed only by muting the headrest audio. , the sound effect can be suppressed in the driver's area through active noise reduction technology. For example, beamforming (Beamforming) technology can be used. Beamforming technology is a technology that can transmit or receive directional signals in space. When two sound sources differ in phase by 180 degrees, they form anti-phase sound waves. That is, when the waveform of one of the sound wave signals reaches the peak, the other signal just reaches the trough. At this time, the two sound wave peaks and valleys are superimposed to form an anti-phase cancellation, which is reflected in the auditory sense that the sound level at this frequency will drop sharply. Feeling weak. Therefore, in one embodiment of the present invention, after locating the spatial position of the driver's head, the audio sound waves emitted by the main driver's speaker can be directed to the driver's head position through other speakers in the car using beamforming technology. Audio with the same amplitude and opposite phase, at this time, the phase cancellation of the two beams of audio occurs. As a result, since the phase cancellation of the two beams of audio occurs at the driver's head position, the main driver's side is silenced, and the driver cannot hear the entertainment audio while other people in the car can continue to enjoy the entertainment audio, effectively ensuring driving safety and car quality. occupants' driving experience.

At the same time, in order to ensure that the two beams of audio can reach the driver's head at the same time for phase cancellation and noise reduction, the car-machine terminal can set the audio playback time according to the spatial position of the driver's head, so that the audio closer to the driver will be played delayed, and the audio farther away from the driver will be played. The audio plays normally. Thus, it is ensured that the audio from the speakers at different positions in the cabin can reach the driver's head at the same time, ensuring the noise reduction effect.

When the car machine needs to adjust the video equipment, the car machine terminal can turn off the screen on the side where the driver's head is facing and/or adjust the screen voltage to distort the screen color according to the driver's head position information, so that the driver Unable to get entertainment videos.

Specifically, at this stage, most of the screens in cars use liquid crystal screens, which are mainly stimulated by electric current to change the alignment direction of liquid crystal molecules, so as to change (modulate) the light transmittance of the external light source and complete the electro-optical conversion. Then use the different excitations of the R, G, and B three primary color signals, through the red, green, and blue three primary color filter films, to complete the color reproduction in the time domain and space domain to generate points, lines, and surfaces that cooperate with the back lamp to form a picture, and When currents of different voltages are applied to the LCD screen, color distortion may occur on the LCD screen. Thus, when the driver's line of sight is directed towards a screen that is playing an entertainment video, the color of the screen on the driver's side can be reversed or reversed by adjusting the voltage of the LCD screen. At this time, the content in the LCD screen will be Presenting a black and white state, thereby ensuring that the main driver cannot obtain entertainment videos while driving, effectively improving driving safety.

Next, the implementation schematic diagram of adjusting the playback state of vehicle multimedia equipment according to the embodiment of the present invention is exemplarily described, as shown in FIG. 3 , and FIG. 300 , the main driver's audio system 310 , the co-pilot's audio system 311 , the central screen 320 and the co-pilot's screen 321 .

When the vehicle is in the driving state and the main driver’s audio 310 and the co-pilot’s audio 311 are playing entertainment audio, the sensor 300 detects that the included angle between the main driver’s audio 310 and the driver’s head relative to the vertical direction is α1, and the distance is L1; The angle α4 between the co-pilot sound 311 and the driver's head relative to the vertical direction is L4; The angle α3 between the sound 311 and the head of the co-driver relative to the vertical direction is L3. The car machine detects the included angle in real time through the sensor 300, and dynamically adjusts the main driving position audio 310 according to the included angle and distance to direct the emission to the driver's head at an angle of α1 with the vertical direction, and the co-pilot audio 311 at an angle of α4 with the vertical direction Directly emit audio with the same amplitude and opposite phase to the driver's head position. Since the distance L4 between the co-pilot sound 311 and the driver's head is greater than the distance L1 between the main driver's sound and the driver's head, the driver's sound Delaying the playing time of the audio allows two beams of audio to reach the driver's head at the same time for phase cancellation, thereby making it impossible to listen to the entertainment audio at the driver's position. At the same time, the car machine can directional transmit audio to the co-pilot, so that passengers in the co-pilot seat can enjoy entertainment audio as usual.

When the vehicle is in the driving state and the central screen 320 and the co-pilot screen 321 are playing entertainment videos, the angles between the driver's line of sight and the central screen 320 and the co-pilot screen 321 detected by the sensor 300 are θ1 and θ2 respectively. When it is within the viewing angle of the corresponding screen, the car will turn off the corresponding screen or increase the voltage to distort the color of the screen. For example, when the angle θ2 between the driver's line of sight and the co-pilot screen 321 is within the viewing angle of the co-pilot screen 321 At this time, the driver can see the entertainment video content of the co-pilot screen 321. At this time, the car machine turns off the co-pilot screen 321, or the car machine adjusts the voltage so that the viewing angle of the co-pilot screen 321 is smaller than θ2, thus, The contents of the co-pilot screen 321 seen from the driver's position are highlighted or completely black, so that the driver cannot obtain entertainment videos. Of course, this method is also applicable to the central screen 320 .

Another embodiment of the present invention provides a car-machine terminal that adjusts the playing state of a vehicle multimedia device. FIG. 4 shows a schematic structural diagram of a car-machine terminal that adjusts the playing state of a vehicle multimedia device, including:

A driving state determining module 410, configured to determine that the vehicle is in a driving state;

The multimedia detection module 420 is used to judge whether the multimedia equipment in the vehicle is playing;

The position detection module 430 is used to detect the position information of the driver's head and the position information of the multimedia device when the multimedia device is playing;

Judging module 440, for judging whether the audio or video played by the multimedia device interferes with the driver based on the position information of the head and the position information of the multimedia device;

The device adjustment module 450 is configured to adjust the multimedia device so that the driver cannot obtain the audio or video when it is judged that the audio or video played by the multimedia device interferes with the driver.

Further, the multimedia equipment includes audio equipment and/or video equipment, the audio equipment includes one or more of in-car audio, headrest audio, etc., the video equipment includes a central screen, and the screen in the co-driver is an in-vehicle screen. At least one screen in the car. It is worth noting that with the development of smart cars, the number of screens in smart cars will increase with demand. Here, only the above three screens are used as examples.

Furthermore, the driving state determination module 410 is used for:

Acquiring the speed of the vehicle, and judging whether the speed of the vehicle is zero;

When the vehicle speed is not zero, it is determined that the vehicle is in a driving state;

When it is judged that the vehicle speed is zero, it is judged whether the vehicle is in a safe position;

If it is not in a safe position, it is judged that the vehicle is in a driving state.

Furthermore, the position detection module 430 captures face information through in-vehicle sensors with built-in face recognition algorithms such as Eigenface and LBP to determine the spatial position of the driver's head. Further, the vehicle-machine terminal can confirm the position and location of the driver's eyes. The spatial position of the ear. This provides the basis for suppressing the sound in the driver's area and making the screen contents invisible to the driver.

Furthermore, the judging module 440 will dynamically judge the playing content of the vehicle multimedia device, and will distinguish the playing content into assisted driving content and entertainment content. The device is adjusted. When the multimedia device plays entertainment content, the judging module 440 judges that the multimedia device should be adjusted.

Further, the equipment adjustment module 450 is used for:

The audio played by the multimedia device interferes with the driver. Adjust the audio device so that the driver cannot obtain the audio. Among them, the adjustment of the audio device includes:

Mute the head restraint speakers located in the driver's area, and/or suppress the audio from the main area audio device through multiple other audio devices in the vehicle.

More specifically, when the driver plays audio through the headrest speaker, the device adjustment module 450 only needs to mute the headrest speaker to complete the adjustment. Based on the location information, active noise reduction technology can be used to suppress the sound effect in the driver's area. For example, beamforming (Beamforming) technology can be used. Beamforming technology is a technology that can transmit or receive directional signals in space. When two sound sources differ in phase by 180 degrees, they form anti-phase sound waves. That is, when the waveform of one of the sound wave signals reaches the peak, the other signal just reaches the trough. At this time, the two sound wave peaks and valleys are superimposed to form an anti-phase cancellation, which is reflected in the auditory sense that the sound level at this frequency will drop sharply. Feeling weak. Therefore, in one embodiment of the present invention, after the device adjustment module 450 locates the spatial position of the driver's head, other speakers in the car can use beamforming technology to send a directional signal corresponding to the driver's head position to the driver's head position. The emitted audio sound waves have the same amplitude and opposite phases. At this time, the phase cancellation of the two beams of audio occurs. Thus, since the device adjustment module 450 controls the phase cancellation of the two beams of audio at the position of the driver's head, the main driving side is silenced, and the driver cannot hear the entertainment audio while other people in the car can continue to enjoy the entertainment audio, effectively ensuring Driving safety and the driving experience of the occupants.

Furthermore, the device adjustment module 450 is used to: the video played by the multimedia device interferes with the driver, and adjust the screen of the video device so that the driver cannot obtain the video, wherein the adjustment of the screen of the video device includes:

According to the position information of the driver's head, the video equipment on the side close to the driver's head is turned off and/or the voltage of the screen is adjusted to distort the color of the screen.

Specifically, at this stage, most of the screens in cars use liquid crystal screens, which are mainly stimulated by electric current to change the alignment direction of liquid crystal molecules, so as to change (modulate) the light transmittance of the external light source and complete the electro-optical conversion. Then use the different excitations of the R, G, and B three primary color signals, through the red, green, and blue three primary color filter films, to complete the color reproduction in the time domain and space domain to generate points, lines, and surfaces that cooperate with the back lamp to form a picture, and When the device adjustment module 450 applies currents of different voltages to the liquid crystal screen, it can cause color distortion to occur on the liquid crystal screen. Thus, when the driver's line of sight is directed towards a screen that is playing an entertainment video, the equipment adjustment module 450 can adjust the voltage of the liquid crystal screen so that the color of the screen on the driver's side is reversed white or black. The content in the mobile phone will appear in black and white, thus ensuring that the main driver cannot obtain entertainment videos while driving, effectively improving driving safety.

It should be noted that each module of the car machine that adjusts the playing state of the vehicle multimedia device of the present invention executes the method of the above-mentioned embodiment, and its specific functions and functions can refer to the description of the above-mentioned embodiment, and will not be repeated here.

Another embodiment of the present invention provides a system for adjusting the playback state of a vehicle multimedia device, as shown in FIG. 1 , including: a car-machine terminal 110, which is the above-mentioned car-machine terminal;

A plurality of sensors 120 are connected to the vehicle-machine terminal 110 for collecting vehicle driving information.

The workflow and functions of each device in the system for adjusting the playback state of vehicle multimedia equipment in the embodiment of the present invention have been described in detail in the above-mentioned embodiment. For details, please refer to the description in the method in FIG. 2 of the above-mentioned embodiment, here No longer.

Referring now to FIG. 5 , there is shown a block diagram of a SoC (System on Chip, System on Chip) 1300 according to an embodiment of the present application. In Fig. 5, similar parts have the same reference numerals. Also, dashed boxes are optional features for more advanced SoCs. In FIG. 5, SoC 1300 includes: interconnection unit 1350, which is coupled to application processor 1310; system agent unit 1380; bus controller unit 1390; integrated memory controller unit 1340; 1320 , which may include integrated graphics logic, image processor, audio processor, and video processor; a static random access memory (Static Random Access Memory, SRAM) unit 1330 ; a direct memory access (DMA) unit 1360 . In one embodiment, coprocessor 1320 includes a special purpose processor such as, for example, a network or communication processor, compression engine, GPGPU, high throughput MIC processor, or embedded processor, among others.

One or more computer-readable media for storing data and/or instructions may be included in static random access memory (SRAM) unit 1330 . Computer-readable storage media may have instructions stored thereon, and specifically, both temporary and permanent copies of the instructions. The instruction may include: when executed by at least one unit in the processor, causing the Soc1300 to execute the computing method according to the above-mentioned embodiment, for details, refer to the above-mentioned method shown in FIG. 2 , which will not be repeated here.

The above description is a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications can also be made. It should be regarded as the protection scope of the present invention.

Claims (7)

1. A method for adjusting the playing state of vehicle multimedia equipment, characterized in that, comprising: Make sure the vehicle is in driving state; Judging whether the multimedia device in the vehicle is playing; When the multimedia device is playing, acquire the position information of the driver's head in the main driving position, and the position information of the multimedia device being played in the vehicle; Based on the position information of the head and the position information of the multimedia device, determine whether the audio or video played by the multimedia device interferes with the driver; If it interferes, adjust the multimedia device; if the audio device interferes with the driver, mute the headrest sound located in the main driving area where the driver is located, or suppress the audio from multiple other audio devices in the car audio from the audio equipment in the main driving area; If the video device interferes with the driver, according to the direction of the driver's line of sight, turn off the screen of the video device facing the driver's line of sight to the screen of the video device on the driver's side, or turn off the screen of the video device facing the driver's line of sight to the driver The screen color of the video device on one side is distorted and appears inverted white or black. 2. The method according to claim 1, wherein determining that the vehicle is in a driving state comprises: Acquiring the speed of the vehicle, and judging whether the speed of the vehicle is zero; When the vehicle speed is not zero, it is determined that the vehicle is in a driving state; When it is judged that the vehicle speed is zero, it is judged whether the vehicle is in a safe position; If it is not in a safe position, it is judged that the vehicle is in a driving state. 3. The method according to claim 1, further comprising: not adjusting the multimedia device when the multimedia device is not playing audio or video that interferes with driving. 4. A car machine for adjusting the playback state of vehicle multimedia equipment, characterized in that it comprises: A driving state determining module, configured to determine that the vehicle is in a driving state; The multimedia detection module is used to judge whether the multimedia equipment in the vehicle is playing; The position detection module is used to detect the position information of the driver's head and the position information of the multimedia device when the multimedia device is playing; A judging module, configured to judge whether the audio or video played by the multimedia device interferes with the driver based on the position information of the head and the position information of the multimedia device; A device adjustment module, configured to adjust the multimedia device so that the driver cannot obtain the audio or video when it is judged that the audio or video played by the multimedia device interferes with the driver; When it is judged that the audio played by the multimedia device interferes with the driver, mute the headrest audio located in the main driving area where the driver is located, and/or suppress the audio from multiple other audio devices in the car. Audio from audio equipment in the main driving area; When it is judged that the video played by the multimedia device interferes with the driver, according to the direction of the driver's line of sight, turn off the screen of the video device facing the driver's line of sight to the screen of the video device on the driver's side, or make the video of the driver's line of sight pointing towards The screen of the device is distorted to white or black on the screen of the video device on the driver's side. 5. The car machine according to claim 4, characterized in that, the multimedia equipment includes audio equipment and/or video equipment, the audio equipment includes headrest audio, and the video equipment includes central screen, copilot screen one or more. 6. The vehicle machine according to claim 5, wherein the driving state determining module is configured to: Acquiring the speed of the vehicle, and judging whether the speed of the vehicle is zero; When the vehicle speed is not zero, it is determined that the vehicle is in a driving state; When it is judged that the vehicle speed is zero, it is judged whether the vehicle is in a safe position; If it is not in a safe position, it is judged that the vehicle is in a driving state. 7. A system for adjusting the playing state of vehicle multimedia equipment, characterized in that it comprises: The locomotive, said locomotive is the locomotive described in any one of claims 4-6; A sensor, the sensor is connected to the vehicle and used to collect vehicle driving information.

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