Control device for acousto-optic synchronization and control method thereof

Abstract

The invention belongs to the field of acousto-optic control, and particularly relates to a control device for acousto-optic synchronization and a control method thereof, and the control device comprises an A2B receiving module, a CAN receiving module, a DSP audio processing module, a power amplification module, a plurality of loudspeakers, an MCU, a lamp, and a PWM control module. The DSP audio processing module is used for receiving an A2B signal and dividing the A2B signal into audio information of different channels; and the MCU is used for receiving the audio information of the first channel of the DSP audio processing module and generating a corresponding light control signal according to the audio information of the first channel so as to control the light color and / or brightness of the lamp. The audio information is processed through the DSP audio processing module, the audio information of the first channel in the DSP audio processing module is received by the MCU, and the corresponding light control signal is generated according to the audio information, so that acousto-optic synchronization is realized.

Description

Technical Field

[0001] The present application belongs to the field of sound and light control, and in particular, relates to a control device for sound and light synchronization and a control method thereof. Background Art

[0002] The current car cockpit entertainment system can play sound and light up the ambient light, but the existing control of sound and ambient light through the multimedia host cannot achieve sound and light synchronization, because the multimedia host cannot know the volume of the sound in each frequency band at the speaker end, so it cannot judge the rhythm of the music, resulting in poor sound and light synchronization effect, and the ambient light cannot reasonably control the brightness and color according to the rhythm and volume of the music. Summary of the invention

[0003] The embodiments of the present application provide a control device and a control method for sound and light synchronization, which can solve the problem that the atmosphere light cannot be synchronized with the music to a certain extent.

[0004] According to a first aspect of an embodiment of the present application, a control device for sound and light synchronization is provided, the control device comprising:

[0005] A2B receiving module, used for receiving multimedia signals through A2B bus and outputting A2B signals;

[0006] CAN receiving module, used to receive multimedia signals through CAN bus and output CAN signals;

[0007] A DSP audio processing module, used for receiving the A2B signal and dividing the A2B signal into audio information of different channels;

[0008] A power amplifier module, used to amplify and output the audio from different channels of the DSP audio processing module;

[0009] A plurality of loudspeakers are used to receive the output signal of the power amplification module and generate sound, and the signals from the different channels correspond to different loudspeakers respectively.

[0010] MCU, including a CAN signal processing module, used for receiving the CAN signal and generating an audio control signal, wherein the audio control signal is used for controlling the DSP audio processing module; and also including a lighting control processing module, used for generating a lighting control signal;

[0011] Luminaires, for producing light;

[0012] A PWM control module, used to control the light generated by the lamp according to the light control signal;

[0013] Among them, the MCU is also used to at least receive the audio information of the first channel of the DSP audio processing module, and generate the corresponding lighting control signal according to the audio information of the first channel to control the light color and / or brightness of the lamp, and the first channel is one of the different channels.

[0014] In some embodiments, the different channels include at least a multimedia channel, a navigation channel, and an alarm sound channel; the first channel is a multimedia channel.

[0015] In some embodiments, the lamp is an LED lamp having at least three colors.

[0016] In some embodiments, generating the corresponding lighting control signal according to the audio information of the first channel includes: controlling the generation of the corresponding lighting control signal according to the frequency in the audio information of the first channel to control the color of the light; wherein the lighting color generated by the audio information of the first channel in different preset frequency bands is different.

[0017] In some embodiments, the CAN signal includes ratio information of different colors; the MCU is further used to determine the light control signal according to the CAN signal to control the light color of the lamp.

[0018] In some embodiments, generating the corresponding light control signal according to the audio information of the first channel includes: controlling the generation of the corresponding light control signal according to the size of the DB value in the audio information of the first channel to control the brightness of the light.

[0019] In some embodiments, the CAN signal includes vehicle speed information; the MCU is further configured to determine the light control signal according to the CAN signal so that the light brightness of the lamp is different at different vehicle speeds.

[0020] According to a second aspect of an embodiment of the present application, a method for controlling sound and light synchronization is provided, the method being applied to the control device as described above, the method comprising:

[0021] Divide the preset frequency band of the audio information of the first channel into several parts, and calculate the average value of the DB values ​​of the several parts as the DB value of the current frequency band;

[0022] The current frequency band DB value is compared with the previous frequency band DB value; if the difference between the current frequency band DB value and the previous frequency band DB value is greater than or equal to a first threshold, the lamp is turned on.

[0023] In some embodiments, the method further comprises:

[0024] Recording the time interval of lighting the lamp each time to generate a first frequency;

[0025] If the lamp is not lit for a first period of time, the lamp is lit at a first frequency.

[0026] In some embodiments, the method further comprises:

[0027] If the lighting of the lamp does not occur, the light brightness is gradually reduced to extinguish the lamp.

[0028] Based on the technical solution proposed in this application, the audio information is processed by the DSP audio processing module, and the audio information of the first channel in the DSP audio processing module is received by the MCU, and the corresponding light control signal is generated according to the audio information to control the light color and / or brightness of the lamp, thereby achieving sound and light synchronization. This solution can reasonably control the brightness and color of the atmosphere light according to the rhythm and volume of the music.

[0029] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a schematic diagram of a control device according to an embodiment of the present application;

[0031] Figure 2 is a schematic diagram showing a control method according to an embodiment of the present application;

[0032] Figure 3 It is a schematic diagram of audio information segmentation according to an embodiment of the present application. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0034] In addition, described feature, structure or characteristic can be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present application. However, those skilled in the art will appreciate that the technical scheme of the present application can be put into practice without one or more of the specific details, or other methods, components, devices, steps, etc. can be adopted. In other cases, known methods, devices, realizations or operations are not shown or described in detail to avoid blurring the various aspects of the application.

[0035] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities may be implemented in software form, or in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices.

[0036] The flowcharts shown in the accompanying drawings are only exemplary and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps can be decomposed, and some operations / steps can be combined or partially combined, so the actual execution order may change according to actual conditions.

[0037] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the feature. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0038] Before describing the solution of the present application in detail, the terms involved in the present application are explained as follows:

[0039] A2B (Automotive Audio Bus) is the vehicle audio bus. The A2B bus is used to connect audio devices in the vehicle.

[0040] PWM control module dimming control module (Pulse Width Modulation) is a device controlled by a simple grouper, and its main function is to adjust the brightness of LED lighting.

[0041] CAN (Controller Area Network) is a serial communication protocol bus used for real-time applications and is used for communication between various components in a car.

[0042] The DSP (Digital Signal Processor) audio processing module is an audio processor specifically used to process digital signals. It can receive external sound signals and output audio signals after internal processing to drive speakers or headphones.

[0043] Power amplifier module (POWER IC), the main function of the power amplifier module is to amplify the power of the input signal to achieve higher output power.

[0044] MCU (Microcontroller Unit), also known as Single Chip Microcomputer or MCU, is a chip-level computer that appropriately reduces the frequency and specifications of the central processing unit (CPU) and integrates some or all of the peripheral interfaces such as memory, timer, USB, A / D conversion, UART, PLC, DMA, etc. on a single chip to form a chip-level computer.

[0045] LED, also known as light emitting diode, is a commonly used light emitting device.

[0046] DB value, also known as decibel value, is a unit of measurement that measures the quantitative ratio of two identical units and is used to measure sound intensity.

[0047] As people's requirements for car comfort are getting higher and higher, the pursuit of driving experience in car cockpits is also rapidly increasing; the current common solution for the sound and light of the cockpit is that the multimedia controller controls the power amplifier and the ambient light controller through LIN or CAN respectively to realize the sound of the multi-channel speaker and the color and brightness changes of the ambient light. The multimedia controller sends the sound to the power amplifier, and then the power amplifier processes the sound and plays the sound through the speaker. In the prior art, the solution of controlling the sound and ambient light through the multimedia host, because the multimedia host cannot know the volume of the sound in each frequency band at the speaker end, it is impossible to judge the rhythm of the music, resulting in poor sound and light synchronization effect, and the ambient light cannot reasonably control the brightness and color according to the rhythm and volume of the music.

[0048] In order to solve this technical problem, the technical solution of this application is proposed. Figure 1 , Figure 1 A control device according to an embodiment of the present application includes:

[0049] A2B receiving module, used for receiving multimedia signals through A2B bus and outputting A2B signals;

[0050] CAN receiving module, used to receive multimedia signals through CAN bus and output CAN signals; DSP audio processing module, used to receive A2B signals and divide the A2B signals into audio information of different channels;

[0051] The power amplifier module is used to amplify and output the audio from different channels of the DSP audio processing module;

[0052] A plurality of loudspeakers are used to receive the output signal of the power amplifier module and generate sound, and the signals from different channels correspond to different loudspeakers respectively.

[0053] MCU, including a CAN signal processing module for receiving CAN signals and generating audio control signals, the audio control signals are used to control the DSP audio processing module; and also including a lighting control processing module for generating lighting control signals;

[0054] Luminaires, for producing light;

[0055] A PWM control module, used to control the light generated by the lamp according to the light control signal;

[0056] The MCU is also used to at least receive audio information of the first channel of the DSP audio processing module, and generate a corresponding lighting control signal according to the audio information of the first channel to control the light color and / or brightness of the lamp, wherein the first channel is one of the different channels.

[0057] The DSP audio processing module processes the audio information, and the MCU receives the audio information of the first channel in the DSP audio processing module, and generates the corresponding light control signal according to the audio information to control the light color and / or brightness of the lamp, thereby achieving sound and light synchronization. This solution can reasonably control the brightness and color of the atmosphere light according to the rhythm and volume of the music.

[0058] In some embodiments, the plurality of speakers are multi-way speakers.

[0059] In some embodiments, different channels include at least a multimedia channel, a navigation channel, and an alarm sound channel; the first channel is a multimedia channel for playing multimedia sounds; the navigation channel is used to play navigation sounds; and the alarm sound channel is used to play alarm sounds.

[0060] In some embodiments, the first channel may be a channel other than the multimedia channel.

[0061] In some embodiments, the CAN signal can be used to control functions such as volume, pause playback, and channel output.

[0062] In some embodiments, the lamp is an LED lamp having at least three colors; in some embodiments, the lamp includes at least three colors of red, green and blue (RGB).

[0063] In some embodiments, the audio information of the first channel includes the frequency information of the audio; generating a corresponding light control signal according to the audio information of the first channel includes: controlling the generation of a corresponding light control signal according to the frequency in the audio information of the first channel to control the color of the light, so that the light color generated by the audio information of the first channel in different preset frequency bands is different. In some embodiments, the light color corresponding to the frequency in the first frequency band is red, the light color corresponding to the frequency in the second frequency band is green, and the light color corresponding to the frequency in the third frequency band is blue. Preferably, the first frequency band is 1-200hz, the second frequency band is 200-2000hz, and the third frequency band is 2000hz-20000hz.

[0064] In some embodiments, the color ratio information (such as the ratio of red, green and blue) can be set by the multimedia host and transmitted to the MCU via the CAN signal. The MCU determines the light control signal based on the CAN signal to make corresponding adjustments to the color of the ambient light.

[0065] In some embodiments, the audio information of the first channel includes a DB value; the audio information of the first channel is used to generate the corresponding light control signal, including: controlling the generation of the corresponding light control signal according to the size of the DB value in the audio information of the first channel to control the brightness of the light. In some embodiments, the larger the DB value, the brighter the light.

[0066] In some embodiments, the current vehicle speed information can be transmitted to the MCU via a CAN signal, and the MCU determines the light control signal according to the CAN signal, so that the light brightness of the lamp is different at different vehicle speeds. In some embodiments, the faster the vehicle speed, the brighter the light.

[0067] According to a second aspect of an embodiment of the present application, a control method is provided, which is applied to the control device as described above. Figure 2 As shown, including:

[0068] Divide the preset frequency band of the audio information of the first channel into several parts, and calculate the average value of the DB values ​​of the several parts as the DB value of the current frequency band;

[0069] The current frequency band DB value is compared with the previous frequency band DB value; if the difference between the current frequency band DB value and the previous frequency band DB value is greater than or equal to the first threshold, the lamp is turned on.

[0070] In some embodiments, Figure 3 As shown, the preset frequency band is divided into 10 parts, which are used to calculate the average value of the 10 DB values.

[0071] In some embodiments, dividing the preset frequency band of the audio information of the first channel into several parts can be executed in the DSP audio processing module; calculating the average value of several parts of DB values ​​and comparing the current frequency band DB value with the previous frequency band DB value can be executed in the MCU. If the difference between the current frequency band DB value and the previous frequency band DB value is greater than or equal to the first threshold, the MCU generates a light control signal to drive the PWM drive lamp to light up.

[0072] In some embodiments, the first threshold is a fixed value, preferably 5DB; in other embodiments, the first threshold is a value related to the previous frequency band DB value, preferably a percentage of the previous frequency band DB value, more preferably 50% of the previous frequency band DB value.

[0073] In some embodiments, the method further includes: recording the time interval between each lighting of the lamp to generate a first frequency; if the lamp is not lit for the first period of time, lighting the lamp according to the first frequency.

[0074] In some embodiments, the time interval for each lighting of the lamp is recorded, and the work of generating the first frequency is executed in the MCU. If the MUC determines that no event of lighting the lamp occurs for the first period of time, the MCU generates a light control signal to drive the PWM driver to light the lamp at the first frequency.

[0075] In some embodiments, the method further includes: if the lamp is not lit, gradually reducing the light brightness to turn off the lamp. In some embodiments, by reducing the brightness of the ambient light once every preset time period (such as 20ms) through an interpolation algorithm, the alarm can be turned off in 200ms to prevent the flashing time from causing glare.

[0076] In some embodiments, if the MCU determines that the lamp is not lit, the MCU generates a light control signal to drive the PWM driver to gradually reduce the light brightness to turn off the lamp.

[0077] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored as one or more instructions or codes on a computer-readable medium or transmitted via a computer-readable medium. Other examples and implementations are within the scope and spirit of the present application and the appended claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hard wiring, or a combination of any of these. In addition, each functional unit may be integrated into a processing unit, each unit may exist physically separately, or two or more units may be integrated into one unit.

[0078] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0079] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.

Claims

1. A control device for sound and light synchronization, characterized in that: The control device comprises: A2B receiving module, used for receiving multimedia signals through A2B bus and outputting A2B signals; CAN receiving module, used to receive multimedia signals through CAN bus and output CAN signals; A DSP audio processing module, used for receiving the A2B signal and dividing the A2B signal into audio information of different channels; A power amplifier module, used to amplify and output the audio from different channels of the DSP audio processing module; A plurality of loudspeakers, used to receive the output signal of the power amplification module and generate sound, wherein the signals from the different channels correspond to different loudspeakers respectively; MCU, including a CAN signal processing module, used for receiving the CAN signal and generating an audio control signal, wherein the audio control signal is used for controlling the DSP audio processing module; and also including a lighting control processing module, used for generating a lighting control signal; Luminaires, for producing light; A PWM control module, used to control the light generated by the lamp according to the light control signal; Among them, the MCU is also used to at least receive the audio information of the first channel of the DSP audio processing module, and generate the corresponding lighting control signal according to the audio information of the first channel to control the light color and / or brightness of the lamp, and the first channel is one of the different channels.

2. The control device according to claim 1, characterized in that: The different channels include at least a multimedia channel, a navigation channel, and an alarm sound channel; the first channel is a multimedia channel.

3. The control device according to claim 1, characterized in that: The lamp is an LED lamp with at least three colors.

4. The control device according to claim 3, characterized in that: Generating the corresponding lighting control signal according to the audio information of the first channel includes: The corresponding lighting control signal is generated according to the frequency in the audio information of the first channel to control the color of the light; wherein the light colors generated by the audio information of the first channel in different preset frequency bands are different.

5. The control device according to claim 3, characterized in that: The CAN signal includes ratio information of different colors; The MCU is also used to determine the light control signal according to the CAN signal to control the light color of the lamp.

6. The control device according to claim 1, characterized in that: Generating the corresponding lighting control signal according to the audio information of the first channel includes: The corresponding light control signal is generated according to the size of the DB value in the audio information of the first channel to control the brightness of the light.

7. The control device according to claim 1, characterized in that: The CAN signal includes vehicle speed information; The MCU is also used to determine the light control signal according to the CAN signal, so that the light brightness of the lamp is different at different vehicle speeds.

8. A method for controlling sound and light synchronization, characterized in that: The method is applied to the control device according to any one of claims 1 to 7, and the method comprises: dividing the preset frequency band of the audio information of the first channel into a plurality of parts, and calculating the average value of the DB values ​​of the plurality of parts as the DB value of the current frequency band; The current frequency band DB value is compared with the previous frequency band DB value; if the difference between the current frequency band DB value and the previous frequency band DB value is greater than or equal to a first threshold, the lamp is turned on.

9. The method according to claim 8, characterized in that The method further comprises: Recording the time interval of lighting the lamp each time to generate a first frequency; If the lamp is not lit for a first period of time, the lamp is lit at a first frequency.

10. The method according to claim 8, characterized in that The method further comprises: If the lighting of the lamp does not occur, the light brightness is gradually reduced to extinguish the lamp.

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