In-vehicle privacy protection method and device, and storage medium

Abstract

The invention discloses an in-vehicle privacy protection method, which comprises the following steps of: when a privacy protection function is in a first open state, identifying human voice in a vehicle; when at least one target human voice is recognized, an ultrasonic unit in the vehicle is controlled to emit dynamic sound waves based on the dynamic audio file, and the dynamic sound waves are random ultrasonic waves with different frequencies and / or different amplitudes changing along with time or a combination of the random ultrasonic waves with different frequencies and / or different amplitudes changing along with time; the target human voice is the human voice including the preset keyword. According to the privacy protection method and device in the vehicle and the storage medium provided by the invention, the conversation content including the preset keyword can be prevented from being recorded, and the privacy and safety of business conversation and private conversation in the vehicle are improved.

Description

Technical Field

[0001] The present application relates to the field of privacy protection, and more specifically, to a privacy protection method, device, and storage medium in a vehicle. Background Art

[0002] With the development of information technology and the popularization of in-vehicle communication equipment, in-car recording functions have become more and more common. However, this also brings risks of privacy leakage and information security, especially in high-end business vehicles or specific environments, such as business talks in the car, government talks, and private chats between celebrities. The business issues and privacy involved are at risk of being recorded, so it is particularly important to prevent in-car conversations from being recorded. Summary of the invention

[0003] In order to solve the above problems, the present invention proposes a privacy protection method, device, and storage medium in a car. When the human voice in the car is recognized to include preset keywords, dynamic sound waves are emitted through an ultrasonic unit to prevent the recording equipment from recording the sound in the car, thereby protecting the privacy of the conversation in the car.

[0004] The present invention provides a privacy protection method in a car, the method comprising: when a privacy protection function is in a first activation state, identifying human voice in the car; when at least one target human voice is identified, controlling an ultrasonic unit in the car to emit dynamic sound waves based on a dynamic audio file, the dynamic sound waves being random ultrasonic waves of different frequencies and / or different amplitudes that change with time, or a combination of random ultrasonic waves of different frequencies and / or different amplitudes that change with time; the target human voice is a human voice that includes a preset keyword.

[0005] In one embodiment, before controlling the ultrasonic unit in the vehicle to emit dynamic sound waves based on the dynamic audio file, it also includes: adjusting the sound wave angle of the ultrasonic unit in the vehicle according to the sound source position of the target human voice so that the sound wave angle matches the sound source position.

[0006] In one embodiment, the method for obtaining the dynamic audio file includes: confirming the amplitude range and / or frequency range of the ultrasonic signal according to preset parameter setting information or received parameter setting information; generating a plurality of short-time ultrasonic signals with different frequencies and / or different amplitudes based on the amplitude range and / or frequency range of the ultrasonic signal; and randomly combining the plurality of short-time ultrasonic signals with different frequencies and / or different amplitudes to obtain the dynamic audio file.

[0007] In one embodiment, after controlling the ultrasonic unit in the vehicle to emit dynamic sound waves based on the dynamic audio file, the method further includes: intermittently controlling the ultrasonic unit to stop playing the dynamic sound waves, or shielding the collected sound based on the dynamic audio file to obtain human voice; obtaining voice loudness according to the human voice, and updating the dynamic audio file based on the voice loudness.

[0008] In one embodiment, after controlling the ultrasonic unit in the vehicle to emit dynamic sound waves based on the dynamic audio file, the method further includes: in response to the current scene meeting a preset condition, controlling the ultrasonic unit to stop emitting the dynamic sound wave; wherein meeting the preset condition includes at least one of the following: the emission duration of the dynamic sound wave reaches a preset duration; after all target users leave the vehicle; the time after all target users stop emitting sound is greater than the preset duration; wherein the target user is the user who emits the target human voice.

[0009] In one embodiment, the on and off states of the privacy protection function include an on state and an off state, and the on state includes the first on state and the second on state; when the privacy protection function is in the first on state, human voice in the car is recognized; when the privacy protection function is in the second on state, the ultrasonic unit is controlled to emit the dynamic sound wave based on the dynamic audio file; when the privacy protection function is in the off state, the privacy protection function is not started.

[0010] In one embodiment, the method further includes: adjusting the on / off state of the privacy protection function based on a received on / off signal; the on / off signal includes at least one of a touch screen on / off signal, a voice on / off signal, and a switch on / off signal.

[0011] In one embodiment, the method further includes: adding and / or deleting the preset keywords based on the received adjustment information.

[0012] The present invention also provides a privacy protection device in a car, which includes a control unit and an ultrasonic unit: the control unit is used to identify human voices in the car when the privacy protection function is in a first activation state, and when at least one target human voice is identified, the ultrasonic unit in the car is controlled to emit dynamic sound waves based on a dynamic audio file, wherein the dynamic sound waves are random ultrasonic waves of different frequencies and / or different amplitudes that change with time, or a combination of random ultrasonic waves of different frequencies and / or different amplitudes that change with time; the target human voice is a human voice that includes a preset keyword; and the ultrasonic unit is used to emit the dynamic sound waves.

[0013] The present invention also provides a storage medium, wherein the storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the above-mentioned in-vehicle privacy protection method are implemented.

[0014] The privacy protection method, device, and storage medium provided by the present invention recognize human voices in the car when the privacy protection function is in the first on state, and when at least one human voice including a preset keyword is recognized, the ultrasonic unit in the car is controlled to emit dynamic sound waves based on a dynamic audio file. The conversation content including the preset keyword can be prevented from being recorded, thereby increasing the privacy and security of business conversations and private conversations in the car. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The figure is a flow chart of a privacy protection method in a vehicle according to an embodiment of the present invention.

[0016] Figure 2 For the present invention Figure 1 Flowchart before step S11 in the embodiment.

[0017] Figure 3 The figure is a schematic structural diagram of a privacy protection device in a vehicle according to an embodiment of the present invention. DETAILED DESCRIPTION

[0018] The above and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of the preferred embodiments with reference to the drawings. Through the description of the specific implementation methods, the technical means and effects adopted by the present invention to achieve the predetermined purpose can be more deeply and specifically understood. However, the drawings are only for reference and explanation purposes and are not used to limit the present invention.

[0019] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the present invention is described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0020] Figure 1 The figure is a flow chart of a privacy protection method in a vehicle according to an embodiment of the present invention.

[0021] like Figure 1 As shown, the privacy protection method in the car provided by this embodiment includes the following steps:

[0022] Step S11: When the privacy protection function is in the first on state, recognize the human voice in the car.

[0023] Specifically, when the privacy protection function is in the first on state, the human voice in the car is acquired through a microphone installed in the car, and whether the content of the human voice includes a preset keyword is identified; when the content of the human voice is identified to include the preset keyword, the human voice is determined to be the target human voice. When acquiring the human voice, the microphone can identify the sound position of the human voice.

[0024] Specifically, the preset keywords are words that appear frequently in any one of business talks, government talks, private talks, and technical talks. The preset keywords can be added and / or deleted according to the received adjustment information.

[0025] In one embodiment, the adjustment information is scene selection information, and which conversation scenes (for example, battery technology conversation scenes, chip technology conversation scenes, government meeting conversation scenes, family conversation scenes, and business conversation scenes) are selected can be known based on the adjustment information. Exclusive words and / or high-frequency words in the selected conversation scenes are obtained through network or locally stored information, and the exclusive words and / or high-frequency words in the selected conversation scenes are set as preset keywords.

[0026] In one embodiment, when a keyword display signal is received, a preset keyword is displayed on the display; when the preset keyword is displayed, the preset keyword is added and / or deleted based on the received adjustment information.

[0027] In one embodiment, preset keywords are added and / or deleted based on the received voice control instructions.

[0028] Step S12: When at least one target human voice is recognized, the ultrasonic unit in the vehicle is controlled to emit dynamic sound waves based on the dynamic audio file, wherein the dynamic sound waves are random ultrasonic waves of different frequencies and / or different amplitudes that change with time, or a combination of random ultrasonic waves of different frequencies and / or different amplitudes that change with time; the target human voice is a human voice that includes preset keywords.

[0029] Specifically, when at least one target human voice is identified in the car, the sound wave angle of the ultrasonic unit in the car is adjusted according to the sound position of the target human voice, so that the sound wave angle of the ultrasonic unit is oriented toward the sound position of the target human voice, when the sound wave angle of the ultrasonic unit matches the sound position of the target human voice. Based on the dynamic audio file, the ultrasonic unit in the car is controlled to emit dynamic sound waves. Since the dynamic audio file is randomly composed of a plurality of short-time ultrasonic signals of different frequencies and / or different amplitudes, when the ultrasonic unit of the present invention emits dynamic sound waves according to the dynamic audio file, the dynamic sound waves will randomly change into ultrasonic waves of different frequencies and / or different amplitudes over time. Therefore, even if the sound in the car is recorded by criminals, it is difficult for the criminals to crack the recording file to obtain the human voice, which further increases the privacy of the conversation in the car.

[0030] Specifically, the process before step S11 includes obtaining parameter setting information input by the user.

[0031] When parameter setting information is obtained, or when parameter setting information is obtained and at least one target human voice is recognized, the amplitude range and / or frequency range of the ultrasonic signal is set according to the parameter setting information; when parameter setting information is not obtained, or when parameter setting information is not obtained and at least one target human voice is recognized, the amplitude range and / or frequency range of the ultrasonic signal is set according to the preset parameter setting information; after setting the amplitude range and / or frequency range of the ultrasonic signal, a plurality of short-time ultrasonic signals of different frequencies and / or different amplitudes are randomly generated that meet the set amplitude range and / or frequency range of the ultrasonic signal, and the generated plurality of short-time ultrasonic signals are randomly combined to obtain a dynamic audio file. For example, when the amplitude range of the ultrasonic signal is set to 200μm-800μm, and the frequency range of the ultrasonic signal is set to 30kHZ-50kHZ, a short-time ultrasonic signal with an amplitude of 500μm, a frequency of 39KHZ, and a duration of 1ms, a short-time ultrasonic signal with an amplitude of 680μm, a frequency of 43KHZ, and a duration of 14ms, and a short-time ultrasonic signal with an amplitude of 260μm, a frequency of 36KHZ, and a duration of 6ms will be generated... Preferably, the amplitude range of the ultrasonic signal set according to the preset parameter setting information is 200μm-1000μm, the frequency range is 25kHZ-60kHZ, and the short-time ultrasonic signal is an ultrasonic signal with a duration of less than 100ms. In summary, the present application can generate a temporary dynamic audio file based on the acquired parameter setting information or the preset parameter setting information when the target human voice is recognized, so that the dynamic sound waves emitted each time are different, so as to increase the difficulty of cracking the recording file. The present application can also directly generate a fixed dynamic audio file based on the acquired parameter setting information or the preset parameter setting information, so as to reduce the use of computing resources and power caused by generating a temporary dynamic audio file each time.

[0032] Specifically, the amplitude range and / or frequency range of the dynamic sound wave is consistent with the amplitude range and / or frequency range of the set ultrasonic signal; when controlling the ultrasonic unit to emit and play the dynamic sound wave, the ultrasonic unit switches the amplitude and / or frequency of the dynamic sound wave over time according to the dynamic audio file.

[0033] Specifically, in another embodiment, a dynamic audio file is not generated, but the ultrasonic unit controller built into the ultrasonic unit is used to control the ultrasonic unit to randomly switch the frequency and / or amplitude of the sound wave when transmitting the sound wave. For example, the ultrasonic unit controller controls the ultrasonic unit to adjust the amplitude to 260 μm and the frequency to 36 KHZ at the 200th ms of transmission, to adjust the amplitude to 160 μm and the frequency to 26 KHZ at the 280th ms of transmission, and to adjust the amplitude to 220 μm and the frequency to 33 KHZ at the 420th ms of transmission...

[0034] Specifically, in one embodiment, when the ultrasonic unit emits and plays dynamic sound waves, the voice loudness of the human voice collected by the microphone is identified, the amplitude range of the corresponding ultrasonic signal is obtained according to the voice loudness, the frequency range of the ultrasonic signal is obtained according to preset parameter setting information or received parameter setting information, and based on the amplitude range of the ultrasonic signal and the frequency range of the ultrasonic signal, a plurality of short-time ultrasonic signals with different frequencies and amplitudes that conform to the amplitude range and frequency range of the ultrasonic signal are randomly generated, and the plurality of generated short-time ultrasonic signals are randomly combined to obtain a loudness-adaptive dynamic audio file, and the dynamic audio file is updated based on the loudness-adaptive dynamic audio file.

[0035] Specifically, the greater the voice loudness, the higher the amplitude range. The present application can adjust the intensity or power of dynamic sound waves according to the corresponding voice loudness, thereby enhancing the privacy protection effect. For example, when the voice loudness is 45db, the amplitude range is 250μm-300μm, when the voice loudness is 50db, the amplitude range is 300μm-350μm, and when the voice loudness is 55db, the amplitude range is 350μm-400μm. In another example, when the amplitude range of the ultrasonic signal is set to 300μm-400μm, if the voice loudness is 45db, the amplitude range is 300μm-330μm, if the voice loudness is 50db, the amplitude range is 330μm-360μm, and if the voice loudness is 55db, the amplitude range is 360μm-400μm. The amplitude and / or amplitude range described in this application are only for readers to understand the embodiments and do not represent the amplitude and / or amplitude range in actual application. In actual application, the amplitude and / or amplitude range can be flexibly set according to the application scenario.

[0036] Specifically, in one embodiment, since the microphone in the car cannot normally recognize the sound when the ultrasonic unit emits dynamic sound waves, this embodiment intermittently controls the ultrasonic unit to stop transmitting for a short period of time, and uses the microphone to obtain human voice when the ultrasonic unit stops transmitting for a short period of time, and then recognizes the voice loudness of the human voice. For example, the ultrasonic unit is controlled to stop transmitting for 50ms or 100ms at the 5th second, the 10th second, the 15th second, and the 20th second of transmitting dynamic sound waves, and the human voice is obtained through the microphone during the period of stopping transmission.

[0037] Specifically, in one embodiment, ultrasonic shielding information is obtained according to a dynamic audio file, and the sound collected by the microphone is shielded based on the ultrasonic shielding information to obtain human voice that is not interfered by dynamic sound waves, and the voice loudness is obtained according to the human voice that is not interfered by dynamic sound waves. For example, when the dynamic audio file is a sound wave with an amplitude of 260 μm and a frequency of 36 KHZ played from 1 ms to 200 ms, the audio information with an amplitude of 260 μm and a frequency of 36 KHZ in the sound collected by the microphone from 1 ms to 200 ms is shielded.

[0038] Specifically, Figure 2 As shown, before step S11, the following steps are included:

[0039] Step S21: Based on the received on / off signal, adjust the on / off state of the privacy protection function.

[0040] Specifically, the on / off state of the privacy protection function is adjusted based on the received on / off signal, and the on / off state of the privacy protection function is adjusted to any one of a first on state, a second on state, and a closed state. The on / off signal input is received through any one of a touch screen, a knob, a signal gear switch, a voice, and a gesture signal.

[0041] Step S22: Obtain the on / off status of the privacy protection function.

[0042] Specifically, the on / off status of the privacy protection function adjusted based on the on / off signal is obtained.

[0043] Step S23: Identify the on / off status of the privacy protection function.

[0044] Specifically, when it is identified that the on / off state of the privacy protection function is the second on state, the process goes to step S25 to execute the control of the ultrasonic unit to emit dynamic sound waves based on the dynamic audio file; when it is identified that the on / off state of the privacy protection function is the off state, the process goes to step S24 to execute the non-activation of the privacy protection function; when it is identified that the on / off state of the privacy protection function is the first on state, the process goes to step S11 to identify the human voice in the car when the privacy protection function is in the first on state. The privacy protection function of the present application has two on states. When it is in the first on state (i.e., the first on state), the human voice in the car will be recognized. When at least one target human voice is recognized, the ultrasonic unit in the car will be controlled to emit dynamic sound waves based on the dynamic audio file, which can intelligently prevent the recording of private conversations and business conversations; when it is in the second on state (i.e., the second on state), the ultrasonic unit will be directly controlled to emit dynamic sound waves based on the dynamic audio file, which can not only allow the user to manually control the ultrasonic unit to emit dynamic sound waves, but also avoid the ultrasonic unit from emitting dynamic sound waves when the microphone in the car fails (i.e., the human voice cannot be recognized).

[0045] Specifically, in one embodiment, step S25 includes that when it is recognized that there is a person in the car, the ultrasonic unit will continue to emit dynamic sound waves.

[0046] Specifically, when the on / off status of the privacy protection function is identified, the on / off status of the privacy protection function is displayed on the display and / or the status display device.

[0047] Specifically, in one embodiment, displaying the on / off status of the privacy protection function on the display includes displaying different icons and / or texts on the display according to the on / off status of the privacy protection function.

[0048] Specifically, in one embodiment, dynamic sound waves are emitted according to the current vehicle speed and / or the ambient noise in the vehicle. For example, when the vehicle speed is high, it is usually accompanied by greater wind noise, engine noise, etc. These background noises can cause certain interference to the human voice in the recording, so the emission power of dynamic sound waves can be reduced; when the vehicle speed is low or the vehicle is parked, the ambient noise is relatively small, and it is easier for the recording device to record the conversation content. Therefore, the emission power of the ultrasonic wave should be increased to increase the intensity of interference and prevent the recording device from capturing the conversation content.

[0049] Specifically, in one embodiment, timing starts after the ultrasonic unit is controlled to emit dynamic sound waves based on a dynamic audio file. When the timing time is greater than a preset time, it is determined that the current scene meets the preset conditions, and the ultrasonic unit is controlled to stop emitting dynamic sound waves.

[0050] Specifically, in one embodiment, after the ultrasonic unit emits dynamic sound waves based on the dynamic audio file, it is identified whether all target users have left the vehicle. After it is identified that all target users have left the vehicle, it is determined that the current scene meets the preset conditions, and the ultrasonic unit is controlled to stop emitting dynamic sound waves. The target user is the user who makes the target human voice.

[0051] Specifically, in one embodiment, after the ultrasonic unit is controlled to emit dynamic sound waves based on the dynamic audio file, it is identified whether all target users have stopped speaking, and when all target users have stopped speaking, timing is started, and when the timing time is greater than the preset time, it is determined that the current scene meets the preset conditions, and the ultrasonic unit is controlled to stop emitting dynamic sound waves. Since the microphone in the car cannot normally recognize the sound when the ultrasonic unit emits dynamic sound waves, this embodiment uses the camera in the car to identify whether all target users have stopped speaking, or intermittently controls the ultrasonic unit to stop transmitting for a short time, and uses the microphone to identify whether all target users have stopped speaking when the ultrasonic unit stops transmitting for a short time. For example, the ultrasonic unit is controlled to stop transmitting for 0.1 second, and the microphone is used to identify whether all target users have stopped speaking during the 0.1 second of stopping transmitting. If so, the ultrasonic unit is controlled to stop transmitting for 0.3 second after a random time, and if not, the ultrasonic unit is continued to be controlled to stop transmitting for 0.1 second after the random time; the microphone is used to identify whether all target users have stopped speaking during the 0.3 second of stopping transmitting. If so, the ultrasonic unit is controlled to stop transmitting for 0.5 second after a random time, and if not, the ultrasonic unit is continued to be controlled to stop transmitting for 0.1 second after the random time; the microphone is used to identify whether all target users have stopped speaking during the 0.5 second of stopping transmitting. If so, the ultrasonic unit is controlled to stop transmitting for 1 second...2 seconds...5 seconds...10 seconds after the random time, and the microphone is used to identify whether all target users have stopped speaking during the 10 seconds of stopping transmitting. If so, it is determined that all target users have stopped speaking, and timing is started. When the timing time is greater than the preset time, the ultrasonic unit is controlled to stop emitting dynamic sound waves.

[0052] Specifically, after controlling the ultrasonic unit to stop emitting dynamic sound waves, the process returns to step S11.

[0053] Specifically, when the ultrasonic unit emits or stops emitting dynamic sound waves, corresponding icons and / or texts will be displayed on the vehicle display.

[0054] Specifically, in one embodiment, when emitting dynamic sound waves, the ultrasonic unit will also adjust at least one of the color, brightness, and breathing frequency of the interior ambient light of the vehicle.

[0055] Specifically, in one embodiment, when the ultrasonic unit emits and / or stops emitting dynamic sound waves, it will send a prompt message to the corresponding mobile terminal.

[0056] Specifically, in another embodiment, the detection result information sent by the recording detection device is obtained, and when the detection result information indicates that the recording device is detected, the ultrasonic unit in the vehicle is controlled to emit dynamic sound waves based on the dynamic audio file.

[0057] Specifically, the recording detection device can detect whether there is an unauthorized recording device in the car. When the recording detection device detects the presence of an unauthorized recording device in the car, or detects that an unauthorized recording device in the car starts recording, it generates detection result information of detecting the recording device.

[0058] Specifically, in another embodiment, when the ultrasonic unit emits dynamic sound waves, the authorized recording device in the vehicle may not be able to collect sound normally. Therefore, the audio information collected by the authorized recording device can be processed according to the dynamic audio file so that the authorized recording device can collect sound normally. For example, when the dynamic audio file plays a sound wave with an amplitude of 260 μm and a frequency of 36 KHZ from the 1st ms to the 200th ms, and plays a sound wave with an amplitude of 160 μm and a frequency of 26 KHZ from the 200th ms to the 280th ms, the audio information with an amplitude of 260 μm and a frequency of 36 KHZ collected by the authorized recording device is shielded from the 1st ms to the 200th ms, and the audio information with an amplitude of 160 μm and a frequency of 26 KHZ collected by the authorized recording device is shielded from the 200th ms to the 280th ms.

[0059] The privacy protection method in the car provided by the present invention, when the privacy protection function is in the first on state, recognizes human voice in the car, and when at least one human voice including a preset keyword is recognized, controls the ultrasonic unit in the car to emit dynamic sound waves based on the dynamic audio file. It can not only prevent the conversation content including the preset keyword from being recorded, but also increase the difficulty of the recorded content being cracked by technology, thereby increasing the privacy and security of the conversation in the car.

[0060] Figure 3 The figure is a schematic structural diagram of a privacy protection device in a vehicle according to an embodiment of the present invention.

[0061] like Figure 3 The in-vehicle privacy protection device 31 of the present embodiment includes a control unit 311 and at least one ultrasonic unit 312 .

[0062] The control unit 311 is used to identify human voices in the car when the privacy protection function is in the first activation state. When at least one target human voice is identified, the control unit 311 is used to control the ultrasonic unit to emit dynamic sound waves based on the dynamic audio file. The dynamic sound waves are random ultrasonic waves with different frequencies and / or different amplitudes that change with time, or a combination of random ultrasonic waves with different frequencies and / or different amplitudes that change with time; the target human voice is a human voice that includes preset keywords.

[0063] The control unit 311 is used to set the amplitude range and / or frequency range of the ultrasonic signal according to the received parameter setting information or the preset parameter setting information, generate a plurality of short-time ultrasonic signals with different frequencies and / or different amplitudes based on the amplitude range and / or frequency range of the ultrasonic signal, and randomly combine the plurality of short-time ultrasonic signals to obtain a dynamic audio file.

[0064] The control unit 311 is used to control the ultrasonic unit 312 to adjust the sound wave emission angle when at least one target human voice is recognized, and to control the ultrasonic unit 312 to emit dynamic sound waves based on the dynamic audio file when the sound wave emission angle of the ultrasonic unit 312 matches the sound emission position.

[0065] The control unit 311 is used to control the ultrasonic unit 312 to stop emitting dynamic sound waves when the current scene meets the preset conditions; the preset conditions include any one of the following: the emission duration of the dynamic sound waves reaches the preset duration, the time after all target users leave the vehicle, and the time after all target users stop speaking is greater than the preset duration, and the target user is the user who emits the target human voice.

[0066] The ultrasonic unit 312 is installed on the surface of a hard object (such as glass) in the vehicle. The sound emission angle of the ultrasonic unit 312 is toward the vehicle. The ultrasonic unit 312 is used to emit dynamic sound waves.

[0067] The dynamic sound waves emitted by the ultrasonic unit 312 exceed the hearing range of the human ear, so the human ear cannot hear the dynamic sound waves emitted by the ultrasonic unit 312, but the emitted dynamic sound waves are still within the pickup range of the microphone. When the microphone receives these dynamic sound wave signals, a series of interference effects will be generated, such as noise superposition, nonlinear distortion or frequency confusion. These dynamic sound waves will interfere with normal human voice audio, causing distortion of the human voice or increased noise in the recording, making it impossible for criminals to hear the content of the human voice from the recording. When the ultrasonic unit 312 emits dynamic sound waves, the frequency and amplitude of the dynamic sound waves will change continuously, making it more difficult for the microphone to effectively filter or process these signals, increasing the complexity and unpredictability of its interference.

[0068] In one embodiment, the ultrasonic unit 312 is an array type ultrasonic transmitter formed by combining a plurality of micro ultrasonic units with micron-level amplitude.

[0069] In one embodiment, the ultrasonic unit 312 includes an ultrasonic unit controller, which is used to control the working state of the micro ultrasonic unit according to the received control signal. Controlling the working state of the micro ultrasonic unit includes controlling the amplitude and frequency of each micro ultrasonic unit in the ultrasonic unit 312.

[0070] In one embodiment, the ultrasonic unit wave controller is also used to control the ultrasonic unit 312 to adjust the sound wave emission angle.

[0071] In one embodiment, the privacy protection device 31 in the car further includes a microphone and a camera. The microphone is used to collect human voice in the car, and the camera is used to collect images in the car.

[0072] In one embodiment, the control unit 311 identifies whether the content of the human voice captured by the microphone includes preset keywords and whether it is a voice control instruction; the control unit 311 identifies whether the image captured by the camera inside the car is a gesture control signal and identifies whether all target users have stopped speaking.

[0073] In one implementation, the control unit 311 identifies the origin of the human voice based on the human voice collected by multiple microphones.

[0074] In one embodiment, the privacy protection device 31 in the vehicle also includes a vehicle-mounted display, which is at least one of a central control display screen, a co-pilot display screen, and a rear display screen. The vehicle-mounted display is used to display an interactive interface, the on-off status of the privacy protection function, the working status of the ultrasonic unit 312, preset keywords, and receiving at least one of touch screen signals.

[0075] In one embodiment, the control unit 311 generates parameter setting information, adjustment information, or obtains an on / off signal based on the touch screen signal received by the vehicle display; the control unit 311 sets the amplitude range and / or frequency range of the ultrasonic signal based on the parameter setting information; the control unit 311 adds and / or deletes preset keywords based on the adjustment information.

[0076] In one embodiment, the control unit 311 adjusts the on / off state of the privacy protection function based on the acquired on / off signal, where the on / off signal includes at least one of a touch screen on / off signal, a voice on / off signal, and a switch on / off signal.

[0077] In one embodiment, the control unit 311 obtains the on / off state of the privacy protection function, and the on / off state of the privacy protection function includes a first on state, a second on state and a off state. When the privacy protection function is in the first on state, the step of recognizing human voice in the car is executed. When the privacy protection function is in the second on state, the ultrasonic unit 312 is controlled to emit dynamic sound waves. When the privacy protection function is in the off state, the privacy protection function is not started.

[0078] The in-vehicle privacy protection device 31 of this embodiment is used to implement the in-vehicle privacy protection method described above. The functions implemented by each module of the in-vehicle privacy protection device 31 can be referred to Figure 1 , 2 The description in the embodiments will not be repeated in this application.

[0079] The present invention also provides a storage medium storing a computer program. When the computer program is executed by a processor, the steps of the above-mentioned in-vehicle privacy protection method are implemented.

[0080] The privacy protection method, device, and storage medium provided by the present invention recognize human voices in the car when the privacy protection function is in the first on state, and when at least one human voice including a preset keyword is recognized, the ultrasonic unit in the car is controlled to emit dynamic sound waves based on the dynamic audio file. This can not only prevent the conversation content including the preset keyword from being recorded, but also increase the difficulty of the recorded content being cracked by technology, thereby increasing the privacy and security of the conversation in the car.

[0081] The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with the profession can make some changes or modifications to equivalent embodiments of equivalent changes through the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A privacy protection method in a car, characterized in that: The method comprises: When the privacy protection function is in the first on state, recognizing human voice in the car; When at least one target human voice is recognized, the ultrasonic unit in the vehicle is controlled to emit dynamic sound waves based on the dynamic audio file. The dynamic sound waves are random ultrasonic waves of different frequencies and / or different amplitudes that change with time, or a combination of random ultrasonic waves of different frequencies and / or different amplitudes that change with time. The target human voice is a human voice that includes preset keywords.

2. The privacy protection method in a vehicle as claimed in claim 1, characterized in that: Before controlling the ultrasonic unit in the vehicle to emit dynamic sound waves based on the dynamic audio file, it also includes: The sound wave angle of the ultrasonic unit in the vehicle is adjusted according to the sound generation position of the target human voice so that the sound wave angle matches the sound generation position.

3. The privacy protection method in a vehicle as claimed in claim 1, characterized in that: The method for obtaining the dynamic audio file includes: Determine the amplitude range and / or frequency range of the ultrasonic signal according to the preset parameter setting information or the received parameter setting information; Based on the amplitude range and / or frequency range of the ultrasonic signal, generating a plurality of short-duration ultrasonic signals with different frequencies and / or different amplitudes; A plurality of short-time ultrasonic signals of different frequencies and / or different amplitudes are randomly combined to obtain the dynamic audio file.

4. The privacy protection method in a vehicle according to any one of claims 1 to 3, characterized in that: After controlling the ultrasonic unit in the vehicle to emit dynamic sound waves based on the dynamic audio file, the method further includes: intermittently controlling the ultrasonic unit to stop playing the dynamic sound waves, or shielding the collected sound based on the dynamic audio file to obtain human voice; Acquire speech loudness according to the human voice, and update the dynamic audio file based on the speech loudness.

5. The privacy protection method in a vehicle as claimed in claim 1, characterized in that: After controlling the ultrasonic unit in the vehicle to emit dynamic sound waves based on the dynamic audio file, the method further includes: In response to the current scene meeting a preset condition, controlling the ultrasonic unit to stop emitting the dynamic sound wave; Among them, meeting the preset conditions includes at least one of the following: The emission duration of the dynamic sound wave reaches a preset duration; After all target users leave the vehicle; The time after all the target users stop speaking is greater than the preset time length; The target user is the user who makes the target human voice.

6. The privacy protection method in a vehicle as claimed in claim 1, characterized in that: The on / off state of the privacy protection function includes an on state and a off state, and the on state includes the first on state and the second on state; When the privacy protection function is in the first on state, recognizing human voice in the vehicle; When the privacy protection function is in the second on state, controlling the ultrasonic unit to emit the dynamic sound wave based on the dynamic audio file; When the privacy protection function is in the closed state, the privacy protection function is not activated.

7. The privacy protection method in a vehicle as claimed in claim 6, characterized in that: The method further comprises: Based on the received on / off signal, the on / off state of the privacy protection function is adjusted; the on / off signal includes at least one of a touch screen on / off signal, a voice on / off signal, and a switch on / off signal.

8. The privacy protection method in a vehicle as claimed in claim 1, characterized in that: The method further comprises: Based on the received adjustment information, the preset keywords are added and / or deleted.

9. A privacy protection device in a car, characterized in that: The device comprises a control unit and an ultrasonic unit: The control unit is used to identify human voices in the vehicle when the privacy protection function is in the first on state, and when at least one target human voice is identified, control the ultrasonic unit in the vehicle to emit dynamic sound waves based on the dynamic audio file, wherein the dynamic sound waves are random ultrasonic waves of different frequencies and / or different amplitudes that change with time, or a combination of random ultrasonic waves of different frequencies and / or different amplitudes that change with time; the target human voice is a human voice that includes a preset keyword; The ultrasonic unit is used to emit the dynamic sound waves.

10. A storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the in-vehicle privacy protection method as described in any one of claims 1 to 8 are implemented.

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