CN104464741A - Method and system for converting audio frequency signals into vision color information - Google Patents
Method and system for converting audio frequency signals into vision color information Download PDFInfo
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Abstract
The invention provides a method and system for converting audio frequency signals into vision color information. The method includes the steps that first, the audio frequency signals are sampled; second, the brightness V of the audio frequency signals is calculated; third, the hue H and the saturability S of the audio frequency signals are calculated; fourth, the brightness V, the hue H and the saturability S are subjected to RGB color format conversion; fifth, RGB values obtained in the fourth step are subjected to color mixing, and finally, the color values of the audio frequency signals are extracted. According to the method and system, the acquired audio frequency signals are quantitatively processed, the energy values of the audio frequency signals are calculated to represent the brightness, the hue and the saturability represented by the audio frequency signals are calculated through FFT processing, then, the obtained brightness, the obtained hue and the obtained saturability are converted into RGB color formats, the whole method performs calculation and deduction according to a scientific principle, the process is a quantitative processing process, expression of object meaning of people is avoided, and the method and system are scientific and precise.
Description
Technical field
The present invention relates to Audio Signal Processing field, more specifically, relate to the method and system that a kind of sound signal turns visual color information.
Background technology
Music and the fine arts are all the important component parts of art.Just as drawing needs shades of colour, the tone color of music is also diversified.Just the tone color of music and color are linked together people a long time ago, the German Ji Xieer of such as 17th century, he once proposed: music is the imitation of light, and the two can be expressed each other.This theory confirmed by Frenchman's John Castle afterwards, he has published " music and color " book in 1720, and one " vision Ha Puxi Coudé " was devised in 1734, the positional alignment of pressing spectrum by scale is distributed, a key connects a kind of color, button plays music score, and light just spreads out of from Transparent color colored ribbon.Also had many scientists, artist or even writer that music and color are linked together afterwards, 1876, famous musician Bo Sakete proposed musicians' acceptable analogy at that time: string music, voice---black; Copper pipe, drum---red; Wooden pipe---blue.And the opinion that conductor Gao get Fu proposes is: flute---blue; Clarinet---rose-colored; Copper pipe---red.This analogy to obtain the approval of more people at that time, but obviously it is with dense individual subjective colo(u)r.18th century, the scientist newton of greatness found the corpuscular property of light, and then people have found again the undulatory property of light, and have separated out seven kinds of colors by prism: the yellowish green ultramarine of blood orange is purple.So, just have people the sound of seven in music and these seven kinds of colors to be connected, same this corresponding relation is obviously mechanical, not much meanings.
Nowadays, the contact of people to music and color has had with being further familiar with.Mention in one section of patent " a kind of brightness of music-controlled luminous lamp group and the method for color " of Zhongxing Microelectronci Co., Ltd., Beijing, the contact of music and color is set up by the mode setting up look-up table, every a line of described look-up table all stores the controling parameters of one group of electroluminescent lamp, and the controling parameters of described electroluminescent lamp is corresponding with the color that multicolor light-emitting lamp group shows and brightness.Obviously, this corresponding relation is limited, is a kind of not too rigorous consistent relationship.Mention in the paper of " Harbin University of Science and Technology's journal " the 6th phase the 18th volume " the mixing light efficiency design and implimentation based on audio signal frequency spectrum is analyzed ": " for RGB mixing light efficiency; can obviously observe at different frequencies; under different amplitudes; color and the light intensity of light are different, Here it is make use of the different duty formation of PWM." but its concrete mapping relations not between labor music (sound signal) and color.Based on above analysis, the present invention from extraction of music colouring information, will realize the colorize effect of music according to the time and frequency domain analysis of simulated audio signal.
Until music and color link together according to the emotional factor of people by the artist of Today, most, but this does not have an effective regular mapping method.Along with scientific technological advance, people have had new understanding to sound and light, although sound belongs to mechanical wave, light wave belongs to electromagnetic wave, and they have all characteristics of ripple, as: the phenomenons such as reflection, refraction, interference, diffraction can be produced.In addition, they have some base attributes of ripple, as: the relation between velocity of wave, wavelength, frequency, the frequency of sound and the frequency of light will link together by easily.Such as, the frequency range of the sound can heard by the ear of people relates to the frequency range of visible ray, most typical is from white light, separated out corresponding seven the basic scales of seven kinds of colors, this mapping relations have certain reason, it has roughly met the corresponding relation of tone color and color, but this mapping relations are limited, and rigorous not.
Summary of the invention
The invention provides the method that the rigorous sound signal of a kind of mapping relations turns visual color information.
Another object of the present invention is to provide a kind of sound signal to turn the system of visual color information.
In order to reach above-mentioned technical purpose, technical scheme of the present invention is as follows:
Sound signal turns a method for visual color information, comprises the following steps:
S1: sound signal is sampled;
S2: the brightness V calculating sound signal;
S3: the form and aspect H and the saturation degree S that calculate sound signal;
S4: brightness V, form and aspect H and saturation degree S are carried out RGB color format conversion;
S5: the rgb value obtained in S4 is carried out the color value that blend of colors finally extracts sound signal.
Further, the sound signal in described step S1 comprises simulated audio signal and digital audio and video signals;
The process of sampling to simulated audio signal is as follows:
N number of point of sampling in unit interval T is a frame signal, N=2
m, M is positive integer;
The process of sampling to digital audio and video signals is as follows:
Carry out resampling to digital audio and video signals, increase sample or subtract sampling multiple according to the sampling rate of audio frequency and the He Ne laser of resampling, obtaining N number of point in unit interval T is the sampled signal of a frame, N=2
m, M is positive integer.
Further, the process calculating the brightness V of sound signal in described step S2 is as follows:
The average energy of the sound signal in unit interval T:
If the ceiling capacity of sound signal is E
max, the brightness V that a frame sampling signal is corresponding:
。
Further, the process of described step S3 is as follows:
The audible spectrum that real-time FFT obtains a frame sound signal is carried out to the sound signal after sampling, to make in a frame audible spectrum the
ithe frequency of individual sampled point is
f i , the form and aspect of this sampled point
h i for:
Make amplitude in a frame audible spectrum
fmaximal value be
f max , minimum value is
f min , in a frame audible spectrum
ithe color saturation of individual sampled point
s i with amplitude
f i pass be:
。
Further, the process of described step S4 is as follows:
Color vector (the R of i-th sampled point in one frame audible spectrum
i, G
i, B
i) be:
。
Further, the process of described step S5 is as follows:
In one frame audible spectrum, the mean value of the RGB of N number of sampled point is:
。
A kind of sound signal turns visual color infosystem, comprising:
Signal sampling module, for gathering simulated audio signal or digital audio and video signals;
Brightness value computing module, for calculating the brightness value V of the sound signal collected;
Form and aspect and saturation computation module, for calculating form and aspect H and the saturation degree S of the sound signal collected;
HSV turns RGB module, for brightness V, form and aspect H and saturation degree S are carried out RGB color format conversion;
RGB blend of colors module, carries out for HSV being turned in RGB module the rgb value obtained obtained the color value that blend of colors finally extracts sound signal.
Compared with prior art, the beneficial effect of technical solution of the present invention is:
The sound signal quantification treatment of the present invention by gathering, calculate its energy value to represent brightness, form and aspect and the saturation degree of its representative is calculated by FFT process, convert the brightness obtained, form and aspect and saturation degree to RGB color format again, whole method is all the principle calculating deduction that rests on a scientific basis, process is all the quantification treatment process of, the expression of the subjectivity meaning of nobody, scientific and precise.
Accompanying drawing explanation
Fig. 1 is the inventive method general flow chart;
Fig. 2 is the inventive method sampled audio signal process flow diagram;
Fig. 3 is that the inventive method asks for sound signal form and aspect and saturation degree process flow diagram;
Fig. 4 is visible spectrum and the hue circle corresponding diagram after cutting;
Fig. 5 is present system structural drawing.
Embodiment
Accompanying drawing, only for exemplary illustration, can not be interpreted as the restriction to this patent;
In order to better the present embodiment is described, some parts of accompanying drawing have omission, zoom in or out, and do not represent the size of actual product;
To those skilled in the art, in accompanying drawing, some known features and explanation thereof may be omitted is understandable.
Below in conjunction with drawings and Examples, technical scheme of the present invention is described further.
Embodiment 1
As shown in Figure 1, a kind of sound signal turns the method for visual color information, comprises the following steps:
S1: sound signal is sampled;
S2: the brightness V calculating sound signal;
S3: the form and aspect H and the saturation degree S that calculate sound signal;
S4: brightness V, form and aspect H and saturation degree S are carried out RGB color format conversion;
S5: the rgb value obtained in S4 is carried out the color value that blend of colors finally extracts sound signal.
In the present embodiment, as shown in Figure 2, the sound signal in step S1 comprises simulated audio signal and digital audio and video signals;
The process of sampling to simulated audio signal is as follows:
Sample in unit interval T
nindividual point is a frame signal,
n=2
m ,
mfor positive integer;
The process of sampling to digital audio and video signals is as follows:
Resampling is carried out to digital audio and video signals, increases according to the sampling rate of audio frequency and the He Ne laser of resampling and sample or subtract sampling multiple, obtain in unit interval T
nindividual point is the sampled signal of a frame,
n=2
m ,
mfor positive integer.
In the present embodiment, the process calculating the brightness V of sound signal in step S2 is as follows:
The average energy of the sound signal in unit interval T:
If the ceiling capacity of sound signal is E
max, the brightness V that a frame sampling signal is corresponding:
。
In the present embodiment, as shown in Figure 3, the process of step S3 is as follows:
The audible spectrum that real-time FFT obtains a frame sound signal is carried out, for a frame of real-time sampling to the sound signal after sampling
npoint signal
u(
n) carry out FFT:
Because the eyes of people can only see visible spectrum, change to violet wavelength regions be about 780nm-380nm by redness, respective frequencies scope is 430THz-750THz.But the color that human eye can be seen might not all drop on visible spectrum, such as aubergine, but it can mix according to a certain percentage with red (R) and blue (B).In order to the relation that audio range is corresponding with visible spectrum can better be reflected, and the corresponding relation of audio range and measurable colourity, as shown in Figure 4, originally complete hue circle (0 ~ 360 °) is divided into corresponding 0 ~ 270 ° of form and aspect by the present embodiment, from redness to purple, namely eliminate " reddish violet part " such color just meeting visible spectrum and have of 270 ° ~ 360 °.
To make in a frame audible spectrum
ithe frequency of individual sampled point is
f i, the form and aspect of this sampled point
h i for:
Make amplitude in a frame audible spectrum
fmaximal value be
f max , minimum value is
f min , in a frame audible spectrum
ithe color saturation of individual sampled point
s i with amplitude
f i pass be:
。
In the present embodiment, rgb color pattern is a kind of color standard of industry member, by obtaining color miscellaneous to the change of red (R), green (G), blue (B) three Color Channels and their superpositions each other, namely RGB is the color representing red, green, blue three passages, this standard almost include human eyesight can all colours of perception, be use one of the widest color system at present.
And HSV is based on the eyes of people to the identification of color, is the color mode that a kind of angle from vision defines.Be tone, saturation degree and brightness by color separation.By adjustment tone, saturation degree and brightness obtain color and change.Therefore, the present embodiment links together to the direct feel of music and the color of HSV pattern.But in order to give full expression to all combined colors, " blend of colors " of simultaneously conveniently the following stated, transfers the color standard RGB color of industry member to by HSV pattern in the present embodiment:
In one frame audible spectrum
icolor vector (the R of individual sampled point
i, G
i, B
i) be:
。
In the present embodiment, the colouring information of the different form and aspect that the sound signal within the unit interval comprises, saturation degree, brightness carries out blend of colors, and a frame sound signal is asked
nthe mean value of the RGB of individual point:
。
The sound signal quantification treatment of this method by gathering, calculate its energy value to represent brightness, form and aspect and the saturation degree of its representative is calculated by FFT process, convert the brightness obtained, form and aspect and saturation degree to RGB color format again, whole method is all the principle calculating deduction that rests on a scientific basis, process is all the quantification treatment process of, the expression of the subjectivity meaning of nobody, scientific and precise.
Embodiment 2
As shown in Figure 5, a kind of sound signal turns visual color infosystem, comprising:
Signal sampling module, for gathering simulated audio signal or digital audio and video signals;
Brightness value computing module, for calculating the brightness value V of the sound signal collected;
Form and aspect and saturation computation module, for calculating form and aspect H and the saturation degree S of the sound signal collected;
HSV turns RGB module, for brightness V, form and aspect H and saturation degree S are carried out RGB color format conversion;
RGB blend of colors module, carries out for HSV being turned in RGB module the rgb value obtained obtained the color value that blend of colors finally extracts sound signal.
The corresponding same or analogous parts of same or analogous label;
Describe in accompanying drawing position relationship for only for exemplary illustration, the restriction to this patent can not be interpreted as;
Obviously, the above embodiment of the present invention is only for example of the present invention is clearly described, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.All any amendments done within the spirit and principles in the present invention, equivalent to replace and improvement etc., within the protection domain that all should be included in the claims in the present invention.
Claims (7)
1. sound signal turns a method for visual color information, it is characterized in that, comprises the following steps:
S1: sound signal is sampled;
S2: the brightness V calculating sound signal;
S3: the form and aspect H and the saturation degree S that calculate sound signal;
S4: brightness V, form and aspect H and saturation degree S are carried out RGB color format conversion;
S5: the rgb value obtained in S4 is carried out the color value that blend of colors finally extracts sound signal.
2. sound signal according to claim 1 turns the method for visual color information, it is characterized in that, the sound signal in described step S1 comprises simulated audio signal and digital audio and video signals;
The process of sampling to simulated audio signal is as follows:
N number of point of sampling in unit interval T is a frame signal, N=2
m, M is positive integer;
The process of sampling to digital audio and video signals is as follows:
Carry out resampling to digital audio and video signals, increase sample or subtract sampling multiple according to the sampling rate of audio frequency and the He Ne laser of resampling, obtaining N number of point in unit interval T is the sampled signal of a frame, N=2
m, M is positive integer.
3. sound signal according to claim 2 turns the method for visual color information, it is characterized in that, the process calculating the brightness V of sound signal in described step S2 is as follows:
The average energy of the sound signal in unit interval T:
If the ceiling capacity of sound signal is E
max, the brightness V that a frame sampling signal is corresponding:
。
4. sound signal according to claim 2 turns the method for visual color information, it is characterized in that, the process of described step S3 is as follows:
The audible spectrum that real-time FFT obtains a frame sound signal is carried out to the sound signal after sampling, makes the frequency of i-th sampled point in a frame audible spectrum be
f i , the form and aspect H of this sampled point
ifor:
The maximal value making amplitude F in a frame audible spectrum is F
max, minimum value is F
min, the color saturation S of i-th sampled point in a frame audible spectrum
iwith amplitude F
ipass be:
。
5. sound signal according to claim 4 turns the method for visual color information, it is characterized in that, the process of described step S4 is as follows:
Color vector (the R of i-th sampled point in one frame audible spectrum
i, G
i, B
i) be:
。
6. sound signal according to claim 5 turns the method for visual color information, it is characterized in that, the process of described step S5 is as follows:
In one frame audible spectrum, the mean value of the RGB of N number of sampled point is:
。
7. the sound signal realized as described in any one of claim 1-6 turns a system for visual color information approach, it is characterized in that, comprising:
Signal sampling module, for gathering simulated audio signal or digital audio and video signals;
Brightness value computing module, for calculating the brightness value V of the sound signal collected;
Form and aspect and saturation computation module, for calculating form and aspect H and the saturation degree S of the sound signal collected;
HSV turns RGB module, for brightness V, form and aspect H and saturation degree S are carried out RGB color format conversion;
RGB blend of colors module, carries out for HSV being turned in RGB module the rgb value obtained obtained the color value that blend of colors finally extracts sound signal.
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| CN108541098A (en) * | 2018-01-29 | 2018-09-14 | 杭州电子科技大学 | The music lighting system of tone method is extracted based on audio difference value |
| CN112857560A (en) * | 2021-02-06 | 2021-05-28 | 河海大学 | Acoustic imaging method based on sound frequency |
| CN113766695A (en) * | 2021-08-25 | 2021-12-07 | 北京奕斯伟计算技术有限公司 | Brightness control method, chip and system of LED lamp |
| CN114416610A (en) * | 2021-12-02 | 2022-04-29 | 深圳市乐升半导体有限公司 | PWM signal generation method, chip and electronic equipment |
| CN114828337A (en) * | 2022-07-01 | 2022-07-29 | 杭州罗莱迪思科技股份有限公司 | Control method and application of outdoor LED dyeing lamp |
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