An audio-activated multi-dimensional laser light show generation system

Abstract

The application discloses an audio linkage multi-dimensional laser lamp effect generation system and relates to the technical field of laser lamp control.The system comprises an audio acquisition module, an audio processing module, a main control module, a laser lamp execution module, an auxiliary light execution module and a power supply protection module; the audio acquisition module acquires and pre-processes an outdoor performance audio signal; the audio processing module extracts characteristic parameters such as an audio frequency, a volume amplitude, a rhythm beat and an audio emotion; the main control module has a laser self-adaptive audio function, can dynamically adjust a laser effect in real time following an audio signal without manual intervention, realizes the synchronous linkage of parameters such as laser color, output power and scanning angle and audio characteristics, and cooperatively adapts the auxiliary light and the laser effect.The system solves the problems of existing outdoor performance laser light and audio linkage lag, poor adaptability and the need for manual intervention, improves the real-time performance, accuracy and ornamental value of the sound and light linkage of outdoor performance, and has the advantages of reasonable structure and strong practicability.

Description

Technical Field

[0001] This invention relates to the technical field of optical communication detection, and more particularly to an audio-linked multi-dimensional laser light effect generation system. Background Technology

[0002] In outdoor performances, laser lights and auxiliary lighting are core equipment for enhancing the atmosphere and visual impact. The synergistic effect of sound and light directly determines the viewing experience. Currently, most laser lighting control systems used in outdoor performances employ a pre-programmed, fixed control method. This means that the laser light patterns are preset based on the general rhythm of the audio, and the system operates according to this fixed program during the performance. This prevents real-time adjustments to keep up with the dynamic changes in the audio signal, resulting in a disconnect between the laser light effects and the audio rhythm and emotional tone. This leads to sound and light misalignment and poor compatibility, severely impacting the overall viewing experience.

[0003] While some existing systems possess basic audio linkage functions, they can only adjust laser brightness based on single audio characteristics (such as volume), failing to comprehensively capture multi-dimensional parameters such as audio frequency, rhythm, and emotional characteristics. The linkage effect is simplistic and crude, unable to meet the personalized needs of different styles of outdoor performances. Furthermore, existing systems often lack adaptive adjustment capabilities, requiring real-time manual intervention to adjust laser parameters. This is cumbersome, has low adjustment precision, and is ill-suited to the complex and variable audio signals and unstable environmental conditions encountered in outdoor performances.

[0004] Furthermore, outdoor environments present challenges such as wind noise, electromagnetic interference, changes in lighting, and fluctuating wind speeds. Existing systems have weak anti-interference capabilities in their audio acquisition modules, leading to inaccurate audio feature extraction and consequently affecting the laser lighting linkage effect. Additionally, some systems lack specific outdoor waterproofing and power supply protection designs, resulting in poor operational stability in complex outdoor environments and susceptibility to malfunctions, disrupting the continuity of performances. Therefore, developing an audio-linked multi-dimensional laser light effect generation system capable of real-time dynamic adjustment following audio, adapting to complex outdoor environments, and providing precise linkage effects has become an urgent need in the field of outdoor performance lighting control. Summary of the Invention

[0005] This invention aims to overcome the shortcomings of existing technologies and provide an audio-linked multi-dimensional laser light effect generation system for outdoor performances.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: An audio-linked multi-dimensional laser light effect generation system is provided, including an audio acquisition module, an audio processing module, a main control module, a laser light execution module, an auxiliary light execution module, and a power supply protection module; The audio acquisition module is used to acquire audio signals from outdoor performances in real time, perform noise reduction and filtering preprocessing on the audio signals, and then transmit the preprocessed signals to the audio processing module. The audio processing module is used to extract features from the preprocessed audio signal to obtain audio feature parameters, which include audio frequency, volume amplitude, rhythm beat and audio emotional features, and transmit the audio feature parameters to the main control module. The main control module has a pre-set mapping relationship library between audio features and laser light effects and auxiliary light effects. It receives audio feature parameters transmitted by the audio processing module, generates corresponding laser control commands and light control commands based on the mapping relationship library, and transmits them to the laser light execution module and the auxiliary light execution module, respectively. The laser light execution module includes multiple sets of multi-dimensional laser light units, which are used to receive laser control commands transmitted by the main control module, adjust the laser color, output power, scanning angle, projection pattern and strobe frequency of the laser light, and realize the dynamic change of laser effect with audio characteristic parameters. The auxiliary lighting execution module includes multiple outdoor waterproof lighting units, which receive lighting control commands transmitted by the main control module, adjust the color, brightness, illumination angle and lighting sequence of the lights, and coordinate with the laser light effects to adapt to outdoor performance scenarios. The power supply protection module is used to provide a stable power supply to each module.

[0007] Preferably, the specific mapping logic between audio features and laser light effects in the mapping relationship library is as follows: When the audio frequency is in the low-frequency range of 20Hz-200Hz, the laser color mapping is red and orange, and the projected pattern is a large-area planar graphic, achieving a visual impact from a distance outdoors; when the audio frequency is in the mid-frequency range of 200Hz-2000Hz, the laser color mapping is yellow and green, and the projected pattern is a linear interwoven graphic, suitable for human voices and the timbre of common musical instruments; when the audio frequency is in the high-frequency range of 2000Hz-20000Hz, the laser color mapping is blue, purple, and cyan, and the projected pattern is a dotted and star-shaped discrete graphic, matching the audio of high-frequency and high-pitched musical instruments; When the volume amplitude is ≤30dB, the laser output power is adjusted to 100mW-1000mW, and the flicker frequency is 1-5Hz, presenting a soft, low-brightness laser effect; when the volume amplitude is 30dB-60dB, the laser output power is adjusted to 1000mW-3000mW, and the flicker frequency is 5-15Hz, presenting a medium-brightness, stable flicker effect; when the volume amplitude is >60dB, the laser output power is adjusted to 3000mW-5000mW, and the flicker frequency is 15-30Hz, presenting a high-brightness, strong-impact flicker effect. When the audio beat speed is ≤60 beats / minute, the laser scanning angle is adjusted to [45°, 90°], the pattern switching speed is 0.5-1 times / second, and the movement is smooth and continuous; when the audio beat speed is 60-120 beats / minute, the laser scanning angle is adjusted to [90°, 180°], the pattern switching speed is 1-2 times / second, and the movement is smooth and rhythmic; when the audio beat speed is >120 beats / minute, the laser scanning angle is adjusted to [180°, 360°], the pattern switching speed is 2-5 times / second, and the movement is rapid and impactful. When the audio is emotionally uplifting, the laser uses a combination of alternating colors, high power, high frequency flash, and wide-angle scanning to project a dynamic interwoven pattern of linear and dotted shapes. When the audio is emotionally soothing, the laser uses a single soft color, low power, low frequency flash, and narrow-angle scanning to project a static planar pattern and slowly flowing linear shapes. When the audio is emotionally somber, the laser uses a dark color, medium to low power, low frequency flash, and narrow-angle scanning to project a simple planar pattern, avoiding strong light interference.

[0008] Preferably, the feature extraction process of the audio processing module includes: extracting audio frequency and volume amplitude using a short-time Fourier transform algorithm, capturing audio rhythm beats using a beat detection algorithm, and extracting audio emotional features by combining the timbre and amplitude changes of the audio signal using a bimodal emotion analysis algorithm. The emotional features include three types: excited, soothing, and low.

[0009] Preferably, the mapping relationship library of the main control module can be customized and edited by the host computer, so that users can add and modify the correspondence between audio features and laser light effects and auxiliary lighting effects according to the theme and scene requirements of outdoor performances. At the same time, it supports one-click switching of multiple preset performance modes.

[0010] Preferably, the main control module also has a built-in laser adaptive audio function, which dynamically adjusts the laser effect according to real-time changes in the audio signal, without relying on a fixed configuration with a preset mapping relationship. The specific detailed steps are as follows: Step 1: Real-time audio sampling and dynamic feature capture. The main control module synchronously receives the audio feature parameters transmitted by the audio processing module. By capturing the dynamic changes of audio state variables such as audio frequency, volume amplitude, rhythm beat and audio emotion in real time, the change rate and amplitude of each feature parameter are recorded synchronously. Step 2: Using the feature recognition algorithm built into the main control module, the changes in the sampled audio feature parameters are identified, and the priority of each feature parameter change is determined. Among them, the change of audio emotion features has the highest priority, followed by the change of rhythm and beat, then the change of volume amplitude, and the change of audio frequency has the lowest priority, to ensure that the laser effect adjustment fits the core changes of the audio. Step 3: Based on the real-time changes and priorities of each audio feature parameter, adjust the parameters of the laser light accordingly. If a change in the emotional characteristics of the audio is detected, switch the combination mode of laser color, power, scanning angle, and projection pattern according to the mapping logic between audio emotion and laser effect. If it is only a change in rhythm and beat, keep the basic configuration of laser color and power unchanged, and dynamically adjust the scanning angle and pattern switching speed to match the rate of change in beat. If it is only a change in volume amplitude, adjust the laser output power and flash frequency synchronously. The larger the amplitude change, the faster the adjustment response speed of power and flash frequency. If it is only a change in audio frequency, switch the laser color and projection pattern to adapt to the real-time changes in frequency band. Step 4: Adjusting parameter calibration and coordination. After each laser effect adjustment, the main control module calibrates the actual output parameters of the laser light execution module to ensure that the adjusted laser effect is accurately matched with the current audio characteristic parameters. At the same time, the auxiliary light execution module is linked to fine-tune the brightness and color of the auxiliary light to ensure that the laser effect and the auxiliary light effect are coordinated and adapted to fit the current audio atmosphere. Step 5: Dynamic adjustment and optimization. The main control module records the correspondence between each change in audio features and the adjustment of laser effects, forming an adaptive adjustment database. When encountering the same or similar changes in audio features in the future, the adjustment response time can be shortened and the adjustment accuracy can be optimized. At the same time, users can enable / disable this adaptive function. When enabled, the fixed mapping relationship is automatically blocked, and the system can be dynamically adjusted in real time to completely follow the audio.

[0011] More preferably, in step 4, a consistency judgment function is used to determine whether the current audio and laser meet the evaluation criteria for mapping consistency, as follows: ; in, Indicates from the first The audio state variable is mapped to the first... The directional correlation strength of each laser state variable; This indicates the total number of time windows in the current analysis segment; Represents audio state variables The state value in the previous time window; Represents laser state variables The state value in the current time window; This indicates the weight of the peer difference suppression term; This indicates a truncation function, meaning that if the result within the parentheses is greater than zero, the original value is retained; otherwise, it is recorded as zero.

[0012] Preferably, the main control module adopts the Precision Time Protocol (PTP) to ensure that the processing of audio feature parameters, transmission of control commands, and execution of laser lights and auxiliary lights are synchronized.

[0013] Preferably, the environmental monitoring module includes a light sensor and a wind speed sensor, which collect outdoor light intensity and wind speed data in real time and transmit them to the main control module. The main control module dynamically adjusts the output parameters of the laser light and auxiliary lights according to the outdoor light intensity and wind speed data to adapt to outdoor environments during the day, at night, and with different wind speeds. The adjustment process of the main control module only adjusts the laser power and brightness threshold based on the corresponding mapping effect.

[0014] Preferably, the audio processing module also supports multi-channel audio input. By simultaneously acquiring multiple audio signals from the lead singer, instruments, and accompaniment, and performing feature extraction and fusion processing on each signal, a laser and light linkage effect adapted to multiple audio signals is generated. During the fusion processing, the emotional characteristics and rhythm of the lead singer's audio are taken as the core, and the frequency and volume amplitude of the instrument audio are combined to adjust the laser effect, still following the mapping logic.

[0015] Preferably, the main control module also includes a fault warning unit, which is used to monitor the operating status of each module of the system in real time. When the laser light execution module, auxiliary light execution module or audio acquisition module fails, a warning signal is issued and the system switches to the standby working mode to ensure the continuous performance of the outdoor performance. The standby working mode still uses the original mapping logic, only switching to the standby laser light unit and the standby audio acquisition unit.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. This system comprehensively extracts multi-dimensional characteristic parameters of audio, such as frequency, volume amplitude, rhythm, and emotional tone, through the audio processing module. The main control module has a laser adaptive audio function, which can dynamically adjust the laser effect in real time according to the audio signal without manual intervention. Through detailed adaptive adjustment steps, it ensures that parameters such as laser color, output power, scanning angle, projection pattern, and strobe frequency are accurately matched with audio characteristics, completely solving the problems of sound and light misalignment, linkage lag, and monotonous effects in existing systems. This allows the laser light effect to perfectly match the rhythm and emotion of the audio, greatly enhancing the sound and light synergy experience and visual impact of outdoor performances.

[0017] 2. The adaptive adjustment function of the main control module can capture the dynamic changes of audio features in real time. By determining the feature priority, it prioritizes the adaptation to the core changes in audio, such as emotion and rhythm. At the same time, it records the adjustment data and optimizes the subsequent response accuracy. It supports users to turn the adaptive function on / off, taking into account both flexibility and practicality. It can adapt to different styles of outdoor performances, such as exciting, soothing, and low-key, without the need for repeated manual parameter adjustments, thus reducing the difficulty of operation.

[0018] 3. After each laser effect adjustment, the main control module calibrates the actual output parameters of the laser light execution module to ensure calibration error. At the same time, it coordinates with the auxiliary lights for synchronous fine-tuning to further improve the accuracy of sound and light coordination, avoid linkage deviations caused by equipment errors and signal transmission delays, and ensure the consistency of the overall performance effect. Attached Figure Description

[0019] Figure 1 This is a framework diagram of an audio-linked multi-dimensional laser light effect generation system in a specific embodiment of the present invention; Figure 2 This is a flowchart illustrating the laser adaptive audio process in a specific embodiment of the present invention. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] refer to Figure 1 As shown, the optical time domain reflectometer for hollow optical cables in this embodiment is used for outdoor performances and includes an audio acquisition module, an audio processing module, a main control module, a laser light execution module, an auxiliary light execution module, and a power supply protection module. The audio acquisition module is used to acquire audio signals from outdoor performances in real time, perform noise reduction and filtering preprocessing on the audio signals, and then transmit the preprocessed signals to the audio processing module. After the performance stage is set up, an outdoor anti-interference UHF dual-band microphone array is used, which includes 6 windproof microphones and has an anti-interference distance of up to 120 meters, making it suitable for long-distance outdoor audio acquisition. The signal preprocessing unit uses an RC filter circuit and an adaptive noise reduction algorithm with a filtering frequency range of 20Hz-20000Hz, which can effectively filter outdoor wind noise and electromagnetic interference to ensure the accuracy of audio signal acquisition. The microphone array is installed on both sides of the stage at a height of 1.5 meters, facing the stage performance area to avoid noise interference from the audience area.

[0022] The audio processing module is used to extract features from the preprocessed audio signal to obtain audio feature parameters, which include audio frequency, volume amplitude, rhythm beat and audio emotional features, and transmit the audio feature parameters to the main control module. Audio processing module: The STM32H743VIT6 microcontroller is used as the core processing chip, equipped with a Short-Time Fourier Transform (STFT) algorithm, a beat detection algorithm, and a dual-modal emotion analysis algorithm. The STFT algorithm has a frame length of 20ms and a frame shift of 10ms for accurate extraction of audio frequency and volume amplitude. The beat detection algorithm uses the autocorrelation function method to capture audio rhythm and beat in real time. The dual-modal emotion analysis algorithm combines audio timbre and amplitude change rate to accurately identify three emotional characteristics: rousing, soothing, and subdued. The audio processing module supports four audio inputs, capable of separately acquiring audio signals from vocals, guitar, bass, and accompaniment, enabling multi-channel audio fusion processing.

[0023] The main control module has a pre-set mapping relationship library between audio features and laser light effects and auxiliary light effects. It receives audio feature parameters transmitted by the audio processing module, generates corresponding laser control commands and light control commands based on the mapping relationship library, and transmits them to the laser light execution module and the auxiliary light execution module, respectively. It features a built-in laser adaptive audio control program that updates audio feature parameters through a preset cycle; it also includes built-in feature priority determination logic, clearly prioritizing audio emotional features > rhythm and beat > volume amplitude > audio frequency; it has a parameter calibration module; it allows users to enable / disable the adaptive function via a host computer (PC), and also features a fault warning function. The host computer (PC) allows users to customize the relationship between audio features and laser light effects and auxiliary lighting effects according to the theme and scene requirements of outdoor performances. It also supports one-click switching of multiple preset performance modes and real-time monitoring of the operating status of each module.

[0024] The specific mapping logic between audio features and laser light effects in the mapping relationship library is as follows: When the audio frequency is in the low-frequency range of 20Hz-200Hz, the laser color mapping is red and orange, and the projected pattern is a large-area planar graphic, achieving a visual impact from a distance outdoors; when the audio frequency is in the mid-frequency range of 200Hz-2000Hz, the laser color mapping is yellow and green, and the projected pattern is a linear interwoven graphic, suitable for human voices and the timbre of common musical instruments; when the audio frequency is in the high-frequency range of 2000Hz-20000Hz, the laser color mapping is blue, purple, and cyan, and the projected pattern is a dotted and star-shaped discrete graphic, matching the audio of high-frequency and high-pitched musical instruments; When the volume amplitude is ≤30dB, the laser output power is adjusted to 100mW-1000mW, and the flicker frequency is 1-5Hz, presenting a soft, low-brightness laser effect; when the volume amplitude is 30dB-60dB, the laser output power is adjusted to 1000mW-3000mW, and the flicker frequency is 5-15Hz, presenting a medium-brightness, stable flicker effect; when the volume amplitude is >60dB, the laser output power is adjusted to 3000mW-5000mW, and the flicker frequency is 15-30Hz, presenting a high-brightness, strong-impact flicker effect. When the audio beat speed is ≤60 beats / minute, the laser scanning angle is adjusted to [45°, 90°], the pattern switching speed is 0.5-1 times / second, and the movement is smooth and continuous; when the audio beat speed is 60-120 beats / minute, the laser scanning angle is adjusted to [90°, 180°], the pattern switching speed is 1-2 times / second, and the movement is smooth and rhythmic; when the audio beat speed is >120 beats / minute, the laser scanning angle is adjusted to [180°, 360°], the pattern switching speed is 2-5 times / second, and the movement is rapid and impactful. When the audio is emotionally uplifting, the laser uses a combination of alternating colors, high power, high frequency flash, and wide-angle scanning to project a dynamic interwoven pattern of linear and dotted shapes. When the audio is emotionally soothing, the laser uses a single soft color, low power, low frequency flash, and narrow-angle scanning to project a static planar pattern and slowly flowing linear shapes. When the audio is emotionally somber, the laser uses a dark color, medium to low power, low frequency flash, and narrow-angle scanning to project a simple planar pattern, avoiding strong light interference.

[0025] The main control module also has a built-in laser adaptive audio function, which dynamically adjusts the laser effect in accordance with real-time changes in the audio signal, without relying on a fixed configuration with preset mapping relationships. Please refer to [link / reference]. Figure 2 The specific steps are as follows: Step 1: Real-time audio sampling and dynamic feature capture. The main control module synchronously receives the audio feature parameters transmitted by the audio processing module. By capturing the dynamic changes of audio state variables such as audio frequency, volume amplitude, rhythm beat and audio emotion in real time, the change rate and amplitude of each feature parameter are recorded synchronously. Step 2: Using the feature recognition algorithm built into the main control module, the changes in the sampled audio feature parameters are identified, and the priority of each feature parameter change is determined. Among them, the change of audio emotion features has the highest priority, followed by the change of rhythm and beat, then the change of volume amplitude, and the change of audio frequency has the lowest priority, to ensure that the laser effect adjustment fits the core changes of the audio. Step 3: Based on the real-time changes and priorities of each audio feature parameter, adjust the parameters of the laser light accordingly. If a change in the emotional characteristics of the audio is detected, switch the combination mode of laser color, power, scanning angle, and projection pattern according to the mapping logic between audio emotion and laser effect. If it is only a change in rhythm and beat, keep the basic configuration of laser color and power unchanged, and dynamically adjust the scanning angle and pattern switching speed to match the rate of change in beat. If it is only a change in volume amplitude, adjust the laser output power and flash frequency synchronously. The larger the amplitude change, the faster the adjustment response speed of power and flash frequency. If it is only a change in audio frequency, switch the laser color and projection pattern to adapt to the real-time changes in frequency band. Step 4: Adjusting parameter calibration and coordination. After each laser effect adjustment, the main control module calibrates the actual output parameters of the laser light execution module to ensure that the adjusted laser effect is accurately matched with the current audio characteristic parameters. At the same time, the auxiliary light execution module is linked to fine-tune the brightness and color of the auxiliary light to ensure that the laser effect and the auxiliary light effect are coordinated and adapted to fit the current audio atmosphere. In this step, a consistency judgment function is used to determine whether the current audio and laser meet the evaluation criteria of mapping consistency, as follows: ; in, Indicates from the first The audio state variable is mapped to the first... The directional correlation strength of each laser state variable; This indicates the total number of time windows in the current analysis segment; Represents audio state variables The state value in the previous time window; Represents laser state variables The state value in the current time window; This indicates the weight of the peer difference suppression term; This indicates a truncation function, meaning that if the result within the parentheses is greater than zero, the original value is retained; otherwise, it is recorded as zero.

[0026] If the first term is large and the second term is small, it indicates that the two terms have both temporal sequence and state pattern consistency, resulting in high consistency. If the first term is small or the second term is too large, it indicates that this relationship is more likely to come from accidental synchronization or common operating conditions rather than stable consistency, and recalibration is required.

[0027] Step 5: Dynamic adjustment and optimization. The main control module records the correspondence between each change in audio features and the adjustment of laser effects, forming an adaptive adjustment database. When encountering the same or similar changes in audio features in the future, the adjustment response time can be shortened and the adjustment accuracy can be optimized. At the same time, users can enable / disable this adaptive function. When enabled, the fixed mapping relationship is automatically blocked, and the system can be dynamically adjusted in real time to completely follow the audio.

[0028] In addition, the main control module adopts the Precision Time Protocol (PTP) to ensure that the processing of audio feature parameters, the transmission of control commands, and the execution of laser lights and auxiliary lights are synchronized.

[0029] The laser light execution module includes multiple sets of multi-dimensional laser light units, which are used to receive laser control commands transmitted by the main control module, adjust the laser color, output power, scanning angle, projection pattern and strobe frequency of the laser light, and realize the dynamic change of laser effect with audio characteristic parameters. The laser light execution module includes multiple sets of multi-dimensional laser light units. Each set of laser light units uses a full-color laser light with an IP65 waterproof rating, supports stepless adjustment of multi-angle scanning, and has a laser output power that is steplessly adjustable from 100mW to 5000mW. The projected patterns include 100 preset patterns and support dynamic pattern combination. Eight sets of laser light units are evenly distributed around the stage and behind the audience seating area to form 360° all-round laser coverage. Among them, n sets are set in front of the stage for close-up atmosphere creation, and n sets can also be set behind the audience seating area for long-distance visual impact.

[0030] The auxiliary lighting execution module includes multiple outdoor waterproof lighting units, which receive lighting control commands transmitted by the main control module, adjust the color, brightness, illumination angle and lighting sequence of the lights, and coordinate with the laser light effects to adapt to outdoor performance scenarios. The auxiliary lighting module supports automatic following; LED color-changing lights are installed at the edge of the stage, moving head beam lights are installed on the top truss of the stage, and follow spots are installed on both sides of the stage backstage, working in conjunction with the laser light unit.

[0031] The power supply protection module is used to provide a stable power supply to each module.

[0032] The power supply protection module can supply power to all modules of the system simultaneously; it has built-in overcurrent protection, overvoltage protection, surge protection and waterproof sealing structure, and is suitable for outdoor high and low temperature and humid environments; it is also equipped with a backup power supply, which can automatically switch when the main power supply fails, ensuring the continuous performance.

[0033] In addition, an environmental monitoring module is provided, including a light sensor and a wind speed sensor, which collects outdoor light intensity and wind speed data in real time and transmits them to the main control module. The main control module dynamically adjusts the output parameters of the laser light and auxiliary lights according to the outdoor light intensity and wind speed data to adapt to outdoor environments during the day, at night, and with different wind speeds. The adjustment process of the main control module does not change the original audio and laser mapping logic, but only adjusts the laser power and brightness threshold based on the corresponding mapping effect.

[0034] When this system is running, all module power is turned on, the power supply protection module is activated to provide stable power to each module, and the system self-test is completed to confirm that each module is operating normally. If a fault is detected, an early warning signal is immediately issued and the system switches to standby mode. The user enables the laser adaptive audio function through the host computer, and the system enters normal working state. The specific process is as follows: Step 1: Audio Acquisition and Preprocessing: The microphone array of the audio acquisition module acquires four audio signals in real time from the lead singer, instruments, and accompaniment of the outdoor concert. The signal preprocessing unit filters noise through an RC filter circuit and then removes outdoor wind noise and electromagnetic interference through an adaptive noise reduction algorithm to obtain a clean audio signal, which is then transmitted to the audio processing module.

[0035] Step 2: Audio Feature Extraction: The audio processing module uses the short-time Fourier transform algorithm to extract the frequency and volume amplitude of each audio signal, captures the rhythm and beat of the overall audio through the beat detection algorithm, and uses the bimodal emotion analysis algorithm combined with timbre and amplitude change rate to extract audio emotion features. After fusing and processing the feature parameters of multiple audio signals, the updated audio feature parameters are transmitted to the main control module every 10ms.

[0036] Step 3: Feature Priority Determination and Adaptive Adjustment of Laser Effect: After receiving the audio feature parameters, the main control module identifies changes in each feature parameter through a built-in algorithm and dynamically adjusts the laser effect according to the priority order of "audio emotional features > rhythm and beat > volume amplitude > audio frequency". When the audio mood changes from soothing to exciting (such as in the chorus of a song), the laser effect is immediately adjusted: the laser color switches to alternating red, blue, and purple, the output power is adjusted to 4000mW, the scanning angle is adjusted, the projected pattern is a dynamic combination of linear and dot patterns, and the strobe frequency is adjusted to 25Hz; at the same time, the auxiliary lights are linked, the LED color-changing lights switch to the corresponding colors, the moving head beam lights speed up the moving head speed, and the follow spot focuses on the lead singer to achieve a sound and light synergy and an exciting atmosphere.

[0037] When only a change in rhythm is detected (such as a song changing from a slow tempo to a medium tempo), the laser color (such as green) and output power (2000mW) are kept unchanged, the scanning angle is reduced, and the pattern switching speed is adjusted to 1.5 times / second to adapt to the rhythm change; the brightness of the auxiliary light is adjusted in sync to maintain coordination with the laser effect.

[0038] When only a change in volume amplitude is detected, such as the lead singer's voice getting louder, the volume increasing from 40dB to 70dB, the laser output power is simultaneously adjusted from 2000mW to 4500mW, and the strobe frequency is adjusted from 10Hz to 28Hz. The adjustment response speed follows the amplitude change of the volume; the greater the amplitude change, the faster the adjustment. The brightness of the auxiliary lights is simultaneously increased to 80%.

[0039] When only an audio frequency change is detected, such as a high-frequency instrument solo where the frequency increases from 1500Hz to 3000Hz, the laser color is switched to blue and the projected pattern is switched to a star-shaped discrete graphic to match the high-frequency audio characteristics.

[0040] Step 4: Parameter Calibration and Co-optimization: After each laser effect adjustment, the main control module calibrates the actual output parameters (power, scanning angle, flicker frequency, etc.) of the laser light execution module to ensure that the calibration error meets the preset threshold; at the same time, it links with the auxiliary light execution module to fine-tune the color, brightness, and lighting sequence of the auxiliary light to ensure that the laser effect and the auxiliary light effect are coordinated and adapted to fit the current audio atmosphere.

[0041] Step 5: Dynamic Memory and Fault Response: The main control module records the correspondence between each audio feature change and laser effect adjustment, forming an adaptive adjustment database. When encountering the same or similar audio feature changes, the adjustment response time is shortened from 10ms to 5ms, optimizing the adjustment accuracy. If a fault is detected in a group of laser light units, an early warning signal is immediately issued, and the system switches to the backup laser light unit, using the current adaptive adjustment logic to ensure the performance continues uninterrupted. If the environmental monitoring module is activated, the main control module fine-tunes the laser power and light brightness based on real-time light intensity and wind speed, without changing the audio-laser mapping logic, to adapt to changes in the outdoor environment.

[0042] The system in this embodiment is applied to large-scale outdoor concerts, enabling real-time adaptive linkage between laser effects and audio signals without synchronization errors or sound-light misalignment. It can comprehensively capture multi-dimensional audio features, adapting to different styles of songs (exciting, soothing, and deep), with laser effects precisely matching the rhythm and emotion of the audio, greatly enhancing the visual impact and entertainment value of the performance. The system has strong anti-interference capabilities, maintaining high accuracy in audio feature extraction and laser linkage even in outdoor wind noise and electromagnetic interference environments. It features robust waterproof and power supply protection designs, ensuring stable continuous operation without downtime. No manual intervention is required to adjust laser parameters in real time, reducing the workload for operators and meeting the complex needs of large-scale outdoor concerts.

[0043] The above embodiments are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. An audio-linked multi-dimensional laser light effect generation system for outdoor performances, characterized in that, It includes an audio acquisition module, an audio processing module, a main control module, a laser light execution module, an auxiliary light execution module, and a power supply protection module; The audio acquisition module is used to acquire audio signals from outdoor performances in real time, perform noise reduction and filtering preprocessing on the audio signals, and then transmit the preprocessed signals to the audio processing module. The audio processing module is used to extract features from the preprocessed audio signal to obtain audio feature parameters, which include audio frequency, volume amplitude, rhythm beat and audio emotional features, and transmit the audio feature parameters to the main control module. The main control module has a pre-set mapping relationship library between audio features and laser light effects and auxiliary light effects. It receives audio feature parameters transmitted by the audio processing module, generates corresponding laser control commands and light control commands based on the mapping relationship library, and transmits them to the laser light execution module and the auxiliary light execution module, respectively. The laser light execution module includes multiple sets of multi-dimensional laser light units, which are used to receive laser control commands transmitted by the main control module, adjust the laser color, output power, scanning angle, projection pattern and strobe frequency of the laser light, and realize the dynamic change of laser effect with audio characteristic parameters. The auxiliary lighting execution module includes multiple outdoor waterproof lighting units, which receive lighting control commands transmitted by the main control module, adjust the color, brightness, illumination angle and lighting sequence of the lights, and coordinate with the laser light effects to adapt to outdoor performance scenarios. The power supply protection module is used to provide a stable power supply to each module.

2. The audio-linked multi-dimensional laser light effect generation system according to claim 1, characterized in that, The specific mapping logic between audio features and laser light effects in the mapping relationship library is as follows: When the audio frequency is in the low-frequency range of 20Hz-200Hz, the laser color mapping is red and orange, and the projected pattern is a large-area planar graphic, achieving a visual impact from a distance outdoors; when the audio frequency is in the mid-frequency range of 200Hz-2000Hz, the laser color mapping is yellow and green, and the projected pattern is a linear interwoven graphic, suitable for human voices and the timbre of common musical instruments; when the audio frequency is in the high-frequency range of 2000Hz-20000Hz, the laser color mapping is blue, purple, and cyan, and the projected pattern is a dotted and star-shaped discrete graphic, matching the audio of high-frequency and high-pitched musical instruments; When the volume amplitude is ≤30dB, the laser output power is adjusted to 100mW-1000mW, and the flicker frequency is 1-5Hz, presenting a soft, low-brightness laser effect; when the volume amplitude is 30dB-60dB, the laser output power is adjusted to 1000mW-3000mW, and the flicker frequency is 5-15Hz, presenting a medium-brightness, stable flicker effect; when the volume amplitude is >60dB, the laser output power is adjusted to 3000mW-5000mW, and the flicker frequency is 15-30Hz, presenting a high-brightness, strong-impact flicker effect. When the audio beat speed is ≤60 beats / minute, the laser scanning angle is adjusted to [45°, 90°], the pattern switching speed is 0.5-1 times / second, and the movement is smooth and continuous; when the audio beat speed is 60-120 beats / minute, the laser scanning angle is adjusted to [90°, 180°], the pattern switching speed is 1-2 times / second, and the movement is smooth and rhythmic; when the audio beat speed is >120 beats / minute, the laser scanning angle is adjusted to [180°, 360°], the pattern switching speed is 2-5 times / second, and the movement is rapid and impactful. When the audio is emotionally uplifting, the laser uses a combination of alternating colors, high power, high frequency flash, and wide-angle scanning to project a dynamic interwoven pattern of linear and dotted shapes. When the audio is emotionally soothing, the laser uses a single soft color, low power, low frequency flash, and narrow-angle scanning to project a static planar pattern and slowly flowing linear shapes. When the audio is emotionally somber, the laser uses a dark color, medium to low power, low frequency flash, and narrow-angle scanning to project a simple planar pattern, avoiding strong light interference.

3. The audio-linked multi-dimensional laser light effect generation system according to claim 1, characterized in that, The feature extraction process of the audio processing module includes: extracting audio frequency and volume amplitude using a short-time Fourier transform algorithm, capturing audio rhythm beats using a beat detection algorithm, and extracting audio emotional features by combining the timbre and amplitude changes of the audio signal using a bimodal emotion analysis algorithm. The emotional features include three types: excited, soothing, and low.

4. The audio-linked multi-dimensional laser light effect generation system according to claim 1, characterized in that, The mapping relationship library of the main control module can be customized and edited by the host computer. It is used by users to add and modify the correspondence between audio features and laser light effects and auxiliary lighting effects according to the theme and scene requirements of outdoor performances. It also supports one-click switching of multiple preset performance modes.

5. The audio-linked multi-dimensional laser light effect generation system according to claim 1, characterized in that, The main control module also has a built-in laser adaptive audio function, which dynamically adjusts the laser effect in accordance with real-time changes in the audio signal, without relying on a fixed configuration of preset mapping relationships. The specific detailed steps are as follows: Step 1: Real-time audio sampling and dynamic feature capture. The main control module synchronously receives the audio feature parameters transmitted by the audio processing module. By capturing the dynamic changes of audio state variables such as audio frequency, volume amplitude, rhythm beat and audio emotion in real time, the change rate and amplitude of each feature parameter are recorded synchronously. Step 2: Using the feature recognition algorithm built into the main control module, the changes in the sampled audio feature parameters are identified, and the priority of each feature parameter change is determined. Among them, the change of audio emotion features has the highest priority, followed by the change of rhythm and beat, then the change of volume amplitude, and the change of audio frequency has the lowest priority, to ensure that the laser effect adjustment fits the core changes of the audio. Step 3: Based on the real-time changes and priorities of each audio feature parameter, adjust the parameters of the laser light accordingly. If a change in the emotional characteristics of the audio is detected, switch the combination mode of laser color, power, scanning angle, and projection pattern according to the mapping logic between audio emotion and laser effect. If it is only a change in rhythm and beat, keep the basic configuration of laser color and power unchanged, and dynamically adjust the scanning angle and pattern switching speed to match the rate of change in beat. If it is only a change in volume amplitude, adjust the laser output power and flash frequency synchronously. The larger the amplitude change, the faster the adjustment response speed of power and flash frequency. If it is only a change in audio frequency, switch the laser color and projection pattern to adapt to the real-time changes in frequency band. Step 4: Adjusting parameter calibration and coordination. After each laser effect adjustment, the main control module calibrates the actual output parameters of the laser light execution module to ensure that the adjusted laser effect is accurately matched with the current audio characteristic parameters. At the same time, the auxiliary light execution module is linked to fine-tune the brightness and color of the auxiliary light to ensure that the laser effect and the auxiliary light effect are coordinated and adapted to fit the current audio atmosphere. Step 5: Dynamic adjustment and optimization. The main control module records the correspondence between each change in audio features and the adjustment of laser effects, forming an adaptive adjustment database. When encountering the same or similar changes in audio features in the future, the adjustment response time can be shortened and the adjustment accuracy can be optimized. At the same time, users can enable / disable the adaptive function. When enabled, the fixed mapping relationship is automatically blocked, and the system can be dynamically adjusted in real time to completely follow the audio.

6. The audio-linked multi-dimensional laser light effect generation system according to claim 5, characterized in that, In step 4, a consistency judgment function is used to determine whether the current audio and laser meet the evaluation criteria for mapping consistency, as follows: ； in, Indicates from the first The audio state variable is mapped to the first... The directional correlation strength of each laser state variable; This indicates the total number of time windows in the current analysis segment; Represents audio state variables The state value in the previous time window; Represents laser state variables The state value in the current time window; This indicates the weight of the peer difference suppression term; This indicates a truncation function, meaning that if the result within the parentheses is greater than zero, the original value is retained; otherwise, it is recorded as zero.

7. The audio-linked multi-dimensional laser light effect generation system according to claim 1, characterized in that, The main control module uses Precision Time Protocol (PTP) to ensure that the processing of audio feature parameters, transmission of control commands, and execution of laser lights and auxiliary lights are synchronized.

8. The audio-linked multi-dimensional laser light effect generation system according to claim 1, characterized in that, It also includes an environmental monitoring module, which includes a light sensor and a wind speed sensor to collect outdoor light intensity and wind speed data in real time and transmit them to the main control module. The main control module dynamically adjusts the output parameters of the laser light and auxiliary lights according to the outdoor light intensity and wind speed data to adapt to outdoor environments during the day, at night and with different wind speeds. The adjustment process of the main control module only adjusts the laser power and brightness threshold based on the corresponding mapping effect.

9. The audio-linked multi-dimensional laser light effect generation system according to claim 1, characterized in that, The audio processing module also supports multi-channel audio input. By simultaneously acquiring multiple audio signals from the lead singer, instruments, and accompaniment, and performing feature extraction and fusion processing respectively, it generates laser and light linkage effects adapted to multiple audio channels. During the fusion processing, the emotional characteristics and rhythm of the lead singer's audio are taken as the core, and the frequency and volume amplitude of the instrument audio are combined to adjust the laser effect, still following the mapping logic.

10. The audio-linked multi-dimensional laser light effect generation system according to claim 1, characterized in that, The main control module also includes a fault warning unit, which is used to monitor the operating status of each module of the system in real time. When the laser light execution module, auxiliary light execution module or audio acquisition module fails, a warning signal is issued and the system switches to the standby working mode to ensure the continuous performance of the outdoor show. The standby working mode still uses the original mapping logic, only switching to the standby laser light unit and the standby audio acquisition unit.

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