CN112911767B - Audio-based light control system and method - Google Patents
Audio-based light control system and method Download PDFInfo
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- CN112911767B CN112911767B CN202110127046.XA CN202110127046A CN112911767B CN 112911767 B CN112911767 B CN 112911767B CN 202110127046 A CN202110127046 A CN 202110127046A CN 112911767 B CN112911767 B CN 112911767B
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The invention discloses a light control system and a method based on audio frequency, which comprises the following steps: the device comprises an audio signal input unit, an audio signal equalization unit, a tone data analysis unit, a loudness data analysis unit and a light mode unit; each data analysis unit reads the audio digital signals and respectively analyzes the audio digital signals into tone data, tone data and loudness data; the light mode unit converts the tone data into a light main tone signal, converts the tone data into a light local tone signal and converts the loudness data into a light overall brightness signal; the light control system controls the light in a layered manner through the tone data, the tone data and the loudness data; the tone data is used for controlling the main tone of the light; the tone data is used for controlling the local tone of the light; loudness data is used to control the overall brightness of the light. The invention can realize the change of brightness and color of the light along with the change of tone, tone and loudness, has richer rhythm effect and improves the user experience.
Description
Technical Field
The invention relates to the field of lighting control, in particular to a light control system and method based on audio.
Background
In the field of lighting, in order to improve the experience of a user on the light atmosphere, the user is not limited to the adjustment of the brightness and the color of the light any more, the change of the brightness and the color of the light along with the change of the tone, the tone and the loudness of the audio frequency needs to be carried out, and the atmosphere is set off by the audio frequency and the light together.
The control of present light and audio frequency is more single, and the scene is more single, has only realized the rhythm of audio frequency and the luminance and the colour synchronous change of light, but does not carry out the hierarchical control of light according to the tone, the loudness of audio frequency, for example: different timbres such as piano music, guitar music, violin music present different light dominant colours, and the tone and the loudness of different timbres present different light colour and luminance, consequently, the rhythm mode of current audio frequency and light can not embody richer rhythm effect, and the experience for the user is relatively poor.
Disclosure of Invention
The invention aims to provide a light control system and method based on audio frequency, and aims to solve the technical problems of single rhythm effect, poor scene and poor user experience of the audio frequency and the light.
In order to achieve the purpose, the invention adopts the following technical scheme:
an audio-based light control system, comprising:
an audio signal input unit 1 for inputting an audio analog signal;
an audio signal equalizing unit 2 which receives an audio analog signal and converts the audio analog signal into an audio digital signal; the input end of the audio signal equalizing unit 2 is connected with the output end of the audio signal input unit 1;
a tone data analyzing unit 3 for reading the audio digital signal and analyzing the audio digital signal into tone data; the input end of the tone data analysis unit 3 is connected with the output end of the audio signal equalization unit 2;
a tone data analysis unit 4 for reading the audio digital signal in real time and analyzing the audio digital signal into tone data; the input end of the tone data analysis unit 4 is connected with the output end of the audio signal equalization unit 2;
the loudness data analysis unit 5 is used for reading the audio digital signal in real time and analyzing the audio digital signal into loudness data; the input end of the loudness data analysis unit 5 is connected with the output end of the audio signal equalization unit 2;
a light mode unit 6, converting the tone data into a light main tone signal, converting the tone data into a light local tone signal, and converting the loudness data into a light overall brightness signal; the input end of the light mode unit 6 is connected with the output ends of the tone data analysis unit 3, the tone data analysis unit 4 and the loudness data analysis unit 5;
the light control system controls the light in a layered mode through the tone data, the tone data and the loudness data; the tone data is used for controlling the main tone of the light; the tone data is used for controlling the local tone of the light; the loudness data is used to control the overall brightness of the light.
In some embodiments, the audio signal equalizing unit 2 performs band-pass filtering, signal amplification and amplitude limiting and signal frequency division on the received audio analog signal, and converts the audio analog signal into an audio digital signal through an internal AD, and the digital signal converted into 8 bytes at the same time is stored in 8 different address units.
In some embodiments, the tone data parsing unit 3 includes an amplitude data reading and updating module, an audio bandwidth determining module, and a tone data defining module, and the audio digital signal is parsed into tone data by the amplitude data reading and updating module, the audio bandwidth determining module, and the tone data defining module.
In some embodiments, the light pattern unit 4 includes a light pattern corresponding to timbre, a light pattern corresponding to tone, and a light pattern corresponding to loudness.
In some embodiments, the tone data parsing unit 3, the tone data parsing unit 4, and the loudness data parsing unit 5 are in serial communication with the audio signal equalizing unit 2 through an I2C bus; the tone data analysis unit 3, the tone data analysis unit 4 and the loudness data analysis unit 5 perform single bus serial communication with the light pattern unit 6 through SPI communication simulation NRZ signals.
The invention also provides a light control method based on audio frequency, which comprises the following steps:
s1: receiving an audio analog signal and converting the audio analog signal into an audio digital signal;
s2: reading the audio digital signal;
s3: analyzing the audio digital signals with different frequencies into N tone data; resolving the audio digital signals with different frequencies into N tone data; analyzing the audio digital signals with different frequencies into loudness data;
s4: converting the N tone data into N light main tone signals; converting the N tone data into N light local tone signals; converting the loudness data into a light overall brightness signal;
wherein N is a natural number greater than 1.
In some embodiments, in step S1, after performing band-pass filtering, signal amplification and amplitude limiting and signal frequency division on the audio analog signal, the audio analog signal is converted into an audio digital signal, and the audio digital signal is converted into 8-byte digital signals of amplitude data of 7 different frequencies of audio and 1 overall frequency average amplitude data and stored in 8 different address units.
In some embodiments, in step S2, the audio digital signal is read for a time greater than 64us at a refresh rate of 100us intervals.
In some embodiments, in step S3, the step of parsing the audio digital signals with different frequencies into N kinds of tone data includes:
s301: reading amplitude data and updating
Picking up sound source signals for more than 10 seconds, respectively caching amplitude data of 7 frequency points from low frequency to high frequency from left to right by using a 7-byte array I, checking at intervals of 50ms, and updating the currently cached amplitude data if the newly read amplitude data is floated by 10 percent compared with the currently cached amplitude data;
s302: determine the audio frequency bandwidth
Respectively calculating the updating times of the amplitude data cached in each address unit of the first array, defining preset times through macro by using 1-byte data as a judgment threshold value, and when the updating times of the amplitude data cached in each address unit of the first array are sequentially judged from left to right to be larger than the preset times, determining the amplitude data cached in each address unit of the first array to be low-frequency points of audio digital signals; when the amplitude data cached in each address unit of the first array sequentially judges that the updating times are more than the preset times from right to left, the amplitude data are high-frequency points of the audio digital signals, and the frequency width of the audio digital signals is a numerical value between a low-frequency point and a high-frequency point;
s303: defining timbre data
Defining the audio digital signal into N tone color data according to the frequency width, wherein different frequency widths correspond to different tone color data, and each tone color data is numbered and classified by 1 byte data;
in step S3, buffering amplitude data of 7 frequency points from low frequency to high frequency respectively from left to right by using the 1 st to 7 th byte data of the second array, where the amplitude data of 7 frequency points are the 7 tone data;
in step S3, buffering total frequency average amplitude data with the 8 th byte data of the second array, where the total frequency average amplitude data is the loudness data.
In some embodiments, the timbre data includes bass timbre data, mid-bass timbre data, treble timbre data, the bass timbre data, the mid-bass timbre data, the treble timbre data being cached with 4 bytes of data, respectively.
The invention also provides an audio-based light control system, which comprises a memory, a processor and a computer program stored in the memory and capable of running on the processor, wherein the processor executes the computer program to realize the steps of any one of the methods.
Compared with the prior art, the invention has the advantages that: the method comprises the steps of reading audio digital signals, calculating and converting the audio digital signals into N tone data according to different frequencies, and converting the N tone data into N lighting main tone signals to realize lighting main tone rendering; the local part of the lamplight presents different lamplight colors according to tone data with different frequencies, and the synchronous change of multiple colors of the local lamplight is realized; and converting the overall frequency average amplitude data into an overall brightness signal to realize overall brightness adjustment. The invention can realize that the light changes brightness and color along with the change of the tone, tone and loudness of the audio, embodies richer rhythm effect and improves the user experience.
Drawings
Fig. 1 is a schematic structural diagram of an audio-based light control system according to an embodiment of the present invention.
Fig. 2 is a logical structure diagram of a tone data parsing unit of the audio-based light control system according to an embodiment of the present invention.
Fig. 3 is a flowchart of an audio-based light control method according to an embodiment of the present invention.
Fig. 4 is a flowchart of steps S301-S303 of an audio-based light control method according to an embodiment of the present invention.
Detailed Description
The invention will be further described with reference to the accompanying drawings and preferred embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
It should be noted that the terms of orientation such as left, right, upper, lower, top and bottom in the present embodiment are only relative concepts or are referred to the normal use status of the product, and should not be considered as limiting.
The audio-based light control system of the present embodiment, as shown in fig. 1, includes an audio signal input unit 1, an audio signal equalizing unit 2, a tone data analyzing unit 3, a tone data analyzing unit 4, a loudness data analyzing unit 5, a light pattern unit 6, and a power supply unit 7.
The audio signal input unit 1 is used to input audio analog signals including an AUX external input audio signal, a MIC audio signal, and a bluetooth audio signal.
The audio signal equalizing unit 2 is used for performing band-pass filtering, signal amplification and amplitude limiting and signal frequency division on the received audio analog signals, converting the audio analog signals into audio digital signals through internal AD, simultaneously converting the audio digital signals into amplitude data of 7 different frequencies of audio and 8-byte digital signals of 1 overall frequency average amplitude data, and storing the digital signals in 8 different address units; the input end of the audio signal equalizing unit 2 is connected with the output end of the audio signal input unit 1.
The tone data analysis unit 3 is in serial communication with the audio signal equalization unit 2 by using an I2C bus, and the tone data unit 3 is used for reading the audio digital signal and analyzing the audio digital signal into tone data; the input end of the tone data analysis unit 3 is connected with the output end of the audio signal equalization unit 2. The tone data analysis unit 3 includes an amplitude data reading and updating module, an audio bandwidth determining module and a tone data defining module, and analyzes the audio digital signal into tone data through the amplitude data reading and updating module, the audio bandwidth determining module and the tone data defining module. The amplitude data reading and updating module comprises an array buffer which buffers the read amplitude data; the audio frequency bandwidth judging module comprises: updating the number buffer and the threshold value buffer, wherein the updating number buffer calculates the updating number of the amplitude data; the threshold buffer presets times as a judgment threshold.
As shown in fig. 2, the amplitude data reading and updating module of the tone data analysis unit 3 reads data of the audio signal equalization unit 2, picks up sound source signals for more than 10 seconds, the array buffer buffers amplitude data of 7 frequency points from low frequency to high frequency respectively in a 7-byte array one-left-to-right format, and checks every 50ms, and if the newly read amplitude data floats by 10% compared with the currently buffered amplitude data, the currently buffered amplitude data is updated; the updating times buffer respectively calculates the updating times of the amplitude data cached by each address unit of the first array, the threshold value buffer uses 1 byte data to define preset times through macro as a judgment threshold value, and when the updating times of the amplitude data cached by each address unit of the first array are sequentially judged from left to right and are greater than the preset times, the audio frequency bandwidth judgment module judges that the audio frequency digital signal is a low frequency point; when the number of times of updating is sequentially judged from right to left by the amplitude data cached in each address unit of the first array, the audio frequency bandwidth judging module judges the high-frequency point of the audio digital signal, and the bandwidth of the audio digital signal is a numerical value from the low-frequency point to the high-frequency point, such as: the low frequency is 100Hz, the high frequency is 5KHZ, and the bandwidth of the audio frequency is 100Hz-5KHZ. The tone data definition module defines N kinds of tone data according to the frequency width, different frequency widths correspond to different tone data, such as 40Hz-200Hz generally corresponds to bass drum, 150Hz-1KHZ generally corresponds to guitar tone, and each tone data is classified by 1 byte data. Currently, the method is divided into bass timbre, mid-high timbre and high-pitch timbre, and 4 bytes are used for caching timbre data.
The tone data analysis unit 4 reads the data of the audio signal equalization unit 2 in real time, and buffers the amplitude data of 7 frequency points from low frequency to high frequency respectively by using the 1 st-7 th byte data of the array two of 8 bytes from left to right format, wherein the data is the intensity of the audio signals corresponding to the tones of 7 different frequencies.
The loudness data analysis unit 5 reads the data of the audio signal equalization unit 2 in real time, and buffers the overall frequency average amplitude data as the overall loudness size by using the 8 th byte data of the 8-byte array two.
The sound data analysis unit 3, the tone data analysis unit 4 and the loudness data analysis unit 5 utilize SPI communication to simulate NRZ signals to carry out single-bus serial communication with the light mode unit 6, the light mode unit 6 is used for converting 4 bytes of sound data into 4 kinds of light main tone signals to realize light main tone rendering, converting 7 bytes of tone data into 7 kinds of light local tone signals to realize real-time synchronous change of light with local 7 kinds of colors, and converting 1 byte of loudness data into a light overall brightness signal to realize overall brightness adjustment; the input of the light pattern unit 6 is connected to the outputs of the tone data analysis unit 3, the tone data analysis unit 4 and the loudness data analysis unit 5. The light pattern unit 6 includes a light pattern corresponding to timbre, a light pattern corresponding to tone, and a light pattern corresponding to loudness.
The power supply unit 7 is respectively connected with the audio signal equalization unit 2, the tone data analysis unit 3, the tone data analysis unit 4, the loudness data analysis unit 5 and the light pattern unit 6, and is used for providing 5V and 3.3V power supplies.
The light control system based on the audio frequency carries out layered control on light through tone data, tone data and loudness data; the tone data is used for controlling the main tone of the light; the tone data is used for controlling the local tone of the light; loudness data is used to control the overall brightness of the light.
The light control method based on audio frequency of the embodiment as shown in fig. 3 and fig. 4 includes the following steps:
s1: an audio analog signal is received and converted to an audio digital signal. The audio signal equalizing unit 2 receives the audio signal from the audio signal input unit 1, quantizes the 20HZ-20KHZ audio analog signal by using the internal AD after internal band-pass filtering, signal amplification and amplitude limiting, and signal frequency division, converts the quantized signal into 8-byte digital signals of amplitude data of 7 different frequencies of audio and 1 overall frequency average amplitude data, and stores the digital signals in 8 different address units.
S2: the audio digital signal is read. The tone data analysis unit 3, the tone data analysis unit 4 and the loudness data analysis unit 5 select a transmission rate of 1Mbit/s in a high-speed mode, the time for reading 8-byte digital signals stored by the audio signal equalization unit 2 is greater than 64us, the digital signals are read at a refresh rate of 100us intervals, audio frequency spectrum signals within 5KHZ can be met according to the Nyquist sampling theorem Fs which is greater than 2FN, and ultra-low delay synchronization can be realized by covering 90% of tone types.
S3: analyzing the audio digital signals with different frequencies into N tone data; analyzing the audio digital signals with different frequencies into N tone data; the audio digital signals of different frequencies are parsed into loudness data. The method for analyzing the audio digital signals with different frequencies into N kinds of tone data comprises the following steps:
s301: reading the amplitude data and updating. The tone data analysis unit 3 reads the data of the audio signal equalization unit 2, picks up sound source signals for more than 10 seconds, buffers the amplitude data of 7 frequency points from low frequency to high frequency respectively in a 7-byte array one from left to right format, looks up the amplitude data every 50ms, and updates the amplitude data buffered currently if the newly read amplitude data is floated by 10% compared with the amplitude data buffered currently.
S302: the audio bandwidth is determined. Respectively calculating the number of times of updating the amplitude data cached in each address unit of the first array, defining the preset number of times as a judgment threshold value by using 1-byte data through a macro, calling the value defined by the macro in real time by a program for comparison, and when the amplitude data cached in each address unit of the first array sequentially judges from left to right that the updated number of times is greater than the preset number of times, taking the updated number of times as a low-frequency point of audio; when the number of times of updating is greater than the number of times of presetting from right to left to the amplitude data of every address unit buffer memory of array one in proper order, just regard as the high frequency point of audio frequency this moment, according to judging the low frequency point that reachs and the high frequency point just can obtain the bandwidth, the bandwidth of audio digital signal is the numerical value between low frequency point to the high frequency point, for example: the low frequency is 100Hz, the high frequency is 5KHZ, and the bandwidth of the audio frequency is 100Hz-5KHZ.
S303: timbre data is defined. It can be defined as N kinds of tone data according to the bandwidth, different bandwidths correspond to different tone data, such as 40Hz-200Hz generally corresponds to bass drum, 150Hz-1KHz generally corresponds to guitar tone, each tone data is classified by 1 byte data. Currently, the method is divided into bass tone, mid-bass tone and high-treble tone, and 4 bytes are used for caching tone data.
The method for analyzing the audio digital signals with different frequencies into N tone data comprises the following steps: the tone data analysis unit 4 reads the data of the audio signal equalization unit 2 in real time, and buffers the amplitude data of 7 frequency points from low frequency to high frequency respectively by using the 1 st byte data to the 7 th byte data of the array two of 8 bytes from left to right, wherein the amplitude data of the 7 frequency points is the intensity of the audio signals corresponding to the tones of 7 different frequencies.
The method for analyzing the audio digital signals with different frequencies into loudness data comprises the following steps: the loudness data analysis unit 5 reads the data of the audio signal equalization unit 2 in real time, and buffers the overall frequency average amplitude data as loudness data by using the 8 th byte data of the 8-byte array two.
S4: converting the N kinds of tone data into N kinds of lamplight main tone signals; converting the N tone data into N light local tone signals; the loudness data is converted into a light overall brightness signal. The light mode unit 6 converts 4 bytes of tone data into 4 kinds of light main tone signals to realize light main tone rendering, converts 7 bytes of tone data into 7 kinds of tone signals to realize real-time synchronous change of local 7 kinds of color lights, and converts 1 byte of loudness data into an overall brightness signal to realize overall brightness adjustment.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. It will be apparent to those skilled in the art that various equivalent substitutions and obvious modifications can be made without departing from the spirit of the invention, and all changes that come within the meaning and range of equivalency of the claims are to be embraced within their scope.
Claims (5)
1. A light control method based on audio is characterized by comprising the following steps:
s1: receiving an audio analog signal and converting the audio analog signal into an audio digital signal;
s2: reading the audio digital signal;
s3: analyzing the audio digital signals with different frequencies into N tone data; analyzing the audio digital signals with different frequencies into N tone data; analyzing the audio digital signals with different frequencies into loudness data;
s4: converting the N tone data into N light main tone signals; converting the N tone data into N light local tone signals; converting the loudness data into a light overall brightness signal;
wherein N is a natural number greater than 1;
in step S3, the step of analyzing the audio digital signals with different frequencies into N types of tone data includes:
s301: reading amplitude data and updating
Picking up sound source signals for more than 10 seconds, respectively caching amplitude data of 7 frequency points from low frequency to high frequency from left to right by using a 7-byte array I, checking at intervals of 50ms, and updating the currently cached amplitude data if the newly read amplitude data is floated by 10 percent compared with the currently cached amplitude data;
s302: determine the audio frequency bandwidth
Respectively calculating the updating times of the amplitude data cached in each address unit of the first array, defining preset times as a judgment threshold value by using 1-byte data through macro, and when the updating times of the amplitude data cached in each address unit of the first array are sequentially judged from left to right to be larger than the preset times, determining the amplitude data cached in each address unit of the first array to be a low-frequency point of an audio digital signal; when the updating times of the amplitude data cached in each address unit of the first array are sequentially judged from right to left to be more than the preset times, the amplitude data are high-frequency points of audio digital signals, and the frequency width of the audio digital signals is a numerical value from a low-frequency point to a high-frequency point;
s303: defining timbre data
Defining the audio digital signal as N tone data according to the frequency width, wherein different frequency widths correspond to different tone data, and each tone data is numbered and classified by 1 byte data;
in step S3, the 1 st to 7 th byte data of the second array are respectively buffered from left to right with amplitude data of 7 frequency points from low frequency to high frequency, and the amplitude data of the 7 frequency points are the 7 tone data;
in step S3, buffering total frequency average amplitude data with the 8 th byte data of the second array, where the total frequency average amplitude data is the loudness data.
2. The audio-based light control method of claim 1,
in step S1, after performing band-pass filtering, signal amplification and amplitude limiting and signal frequency division on the audio analog signal, the audio analog signal is converted into an audio digital signal, and the audio digital signal is converted into 8-byte digital signals of amplitude data of 7 different frequencies of audio and 1 overall frequency average amplitude data and stored in 8 different address units.
3. The audio-based light control method of claim 2,
in step S2, the time for reading the audio digital signal is greater than 64us, and the audio digital signal is read at a refresh rate of 100us intervals.
4. The audio-based light control method of claim 1 wherein the timbre data comprises bass timbre data, mid-high timbre data, treble timbre data, the bass timbre data, mid-high timbre data, treble timbre data being cached with 4 bytes of data, respectively.
5. An audio-based light control system comprising a memory, a processor and a computer program stored in said memory and executable on said processor, wherein said processor when executing said computer program implements the steps of the method according to any one of claims 1 to 4.
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| CN202085349U (en) * | 2011-04-17 | 2011-12-21 | 夏振平 | Wireless real-time lighting system capable of sensing voice frequency |
| CN106304539A (en) * | 2016-08-03 | 2017-01-04 | 杭州电子科技大学 | A kind of music lantern controller design method followed based on rhythm |
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