CN113853047A - Light control method and device, storage medium and electronic equipment - Google Patents
Light control method and device, storage medium and electronic equipment Download PDFInfo
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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
- H05B47/105—Controlling the light source in response to determined parameters
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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
- H05B47/165—Controlling the light source following a pre-assigned programmed sequence; Logic control [LC]
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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
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Abstract
The present disclosure relates to a light control method, apparatus, storage medium, and electronic device, the method comprising: the method comprises the steps of obtaining an audio signal of an audio and video file, converting the audio signal into a sound frequency spectrum, enabling the sound frequency spectrum to comprise a plurality of frequency windows, enabling each frequency window to correspond to the audio signal of one frequency band, conducting normalization processing on the frequency windows, mapping the processed sound frequency spectrum to a preset light frequency spectrum range, obtaining a light frequency spectrum corresponding to the light-emitting device, and controlling the light effect of the light-emitting device according to the light frequency spectrum. According to the method, the audio signal is converted into the sound frequency spectrum, the sound frequency spectrum is mapped to obtain the corresponding light frequency spectrum, the sound and the light effect of the light-emitting device are connected in a frequency domain, and the light effect is controlled through the change of the sound frequency spectrum, so that the light effect of the light-emitting device is controlled in real time according to the sound, the linkage of the sound and the light-emitting device is improved, and the light effect of the light-emitting device is enriched.
Description
Technical Field
The present disclosure relates to the field of control technologies, and in particular, to a light control method, device, storage medium, and electronic device.
Background
With the continuous development of science and technology, more and more light-emitting devices are added with IOT (Internet of Things) ranks, and the light-emitting devices have the functions of Bluetooth, Wi-Fi (Wireless Fidelity, Chinese: Wireless Fidelity) and color adjustment and the like, and can be linked with audio playing devices such as televisions, projectors, sound equipment and the like so as to improve the use experience of users. One common linkage method is to link the sound emitted by the audio playing device with the light color of the light emitting device to control the light color of the light emitting device.
Disclosure of Invention
The present disclosure provides a light control method, device, storage medium, and electronic device, which can control a light effect through a change of a sound spectrum, and enrich the light effect of a light emitting device.
According to a first aspect of embodiments of the present disclosure, there is provided a light control method, the method including:
acquiring an audio signal of an audio/video file;
converting the audio signal into a sound spectrum; the sound spectrum comprises a plurality of frequency windows, and each frequency window corresponds to an audio signal of one frequency band;
normalizing the frequency windows, and mapping the processed sound frequency spectrum to a preset light frequency spectrum range to obtain a light frequency spectrum corresponding to the light-emitting device;
and controlling the lamp effect of the light-emitting equipment according to the lamp light frequency spectrum.
Optionally, the frequency intervals of the respective frequency bins of the plurality of frequency bins may be the same or different;
the arrangement order of the plurality of frequency windows may be changed according to an instruction.
Optionally, the light effect comprises a light brightness and a flicker frequency, and the method further comprises:
determining the audio information of the audio and video file according to the audio signal; the audio information comprises at least one of an audio type, an audio rhythm and an audio style;
and determining the target light brightness and the target flicker frequency according to the audio information, and controlling the light-emitting equipment according to the target light brightness and the target flicker frequency.
Optionally, before the mapping the processed sound spectrum to a preset light spectrum range to obtain a light spectrum corresponding to the lighting device, the method further includes:
determining an audio response corresponding to each frequency window according to the sound frequency spectrum;
determining a first frequency window from the multiple frequency windows according to the audio response, wherein the first frequency window is a frequency window of which the corresponding audio response meets a first preset audio response condition;
and updating the sound spectrum according to the first frequency window to remove the frequency band corresponding to the first frequency window in the sound spectrum, so as to obtain an updated first sound spectrum.
Optionally, before the mapping the processed sound spectrum to a preset light spectrum range to obtain a light spectrum corresponding to the lighting device, the method further includes:
determining an audio response corresponding to each frequency window according to the sound frequency spectrum;
determining a second frequency window from the plurality of frequency windows according to the audio response, wherein the second frequency window is a frequency window of which the corresponding audio response meets a second preset audio response condition;
updating the second frequency window according to the target weight and the second frequency window to obtain an updated second audio frequency spectrum; the target weight is used to adjust the audio response corresponding to the second frequency window.
Optionally, the light effect includes a color of light, and the controlling the light effect of the light emitting device according to the light spectrum includes:
grouping the frequency windows according to a preset rule to obtain a specified number of frequency window sets, wherein each frequency window set comprises at least one frequency window;
for each frequency window set, determining a target response value corresponding to the frequency window set; the target response value corresponding to each frequency window set is the accumulated value of the audio response corresponding to each frequency window in the frequency window set;
and determining a target light color according to the target response value of each frequency window set, and controlling the light-emitting equipment to emit light with the target light color.
Optionally, the light effect includes a color of light, and the controlling the light effect of the light emitting device according to the light spectrum includes:
determining a tristimulus value corresponding to the lamplight frequency spectrum according to the lamplight frequency spectrum;
and determining the color of target light according to the tristimulus values, and controlling the light-emitting equipment to emit light of the color of the target light.
Optionally, when the number of the light-emitting devices is multiple, the mapping the processed sound spectrum to a preset light spectrum range to obtain a light spectrum corresponding to the light-emitting device includes:
mapping the processed sound frequency spectrum to a preset optical frequency spectrum range to obtain a target optical frequency spectrum;
determining a light spectrum corresponding to each light-emitting device from the target light spectrum according to the light spectrum range corresponding to each light-emitting device;
the lamp effect of controlling the light-emitting device according to the lamp light frequency spectrum comprises:
and aiming at each light-emitting device, controlling the light effect of the light-emitting device according to the light spectrum corresponding to the light-emitting device.
According to a second aspect of the embodiments of the present disclosure, there is provided a light control device, the device comprising:
the acquisition module is used for acquiring an audio signal of the audio/video file;
the conversion module is used for converting the audio signal into a sound frequency spectrum; the sound spectrum comprises a plurality of frequency windows, and each frequency window corresponds to an audio signal of one frequency band;
the mapping module is used for carrying out normalization processing on the frequency windows and mapping the processed sound frequency spectrum to a preset optical frequency spectrum range to obtain a light frequency spectrum corresponding to the light-emitting device;
and the control module is used for controlling the lamp effect of the light-emitting equipment according to the lamplight frequency spectrum.
Optionally, the frequency intervals of the respective frequency bins of the plurality of frequency bins may be the same or different;
the arrangement order of the plurality of frequency windows may be changed according to an instruction.
Optionally, the light effect includes a light brightness and a flicker frequency, and the control module is further configured to:
determining the audio information of the audio and video file according to the audio signal; the audio information comprises at least one of an audio type, an audio rhythm and an audio style;
and determining the target light brightness and the target flicker frequency according to the audio information, and controlling the light-emitting equipment according to the target light brightness and the target flicker frequency.
Optionally, the apparatus further comprises:
the determining module is used for determining the audio response corresponding to each frequency window according to the sound frequency spectrum before the processed sound frequency spectrum is mapped to a preset optical frequency spectrum range to obtain the light frequency spectrum corresponding to the light-emitting device;
the determining module is further configured to determine a first frequency window from the multiple frequency windows according to the audio response, where the first frequency window is a frequency window whose corresponding audio response satisfies a first preset audio response condition;
and the updating module is used for updating the sound frequency spectrum according to the first frequency window so as to remove the frequency band corresponding to the first frequency window in the sound frequency spectrum to obtain an updated first sound frequency spectrum.
Optionally, the determining module is further configured to determine, according to the sound spectrum, an audio response corresponding to each frequency window before the processed sound spectrum is mapped to a preset light spectrum range to obtain a light spectrum corresponding to the lighting device;
the determining module is further configured to determine a second frequency window from the multiple frequency windows according to the audio response, where the second frequency window is a frequency window whose corresponding audio response satisfies a second preset audio response condition;
the updating module is further configured to update the second frequency window according to the target weight and the second frequency window to obtain an updated second sound spectrum; the target weight is used to adjust the audio response corresponding to the second frequency window.
Optionally, the light effect comprises a light color, and the control module comprises:
a grouping module, configured to group the multiple frequency windows according to a preset rule to obtain a specified number of frequency window sets, where each frequency window set includes at least one frequency window;
the determining submodule is used for determining a target response value corresponding to each frequency window set; the target response value corresponding to each frequency window set is the accumulated value of the audio response corresponding to each frequency window in the frequency window set;
and the control submodule is used for determining the target light color according to the target response value of each frequency window set and controlling the light-emitting equipment to emit the light of the target light color.
Optionally, the light effect includes a light color, and the determining submodule is further configured to determine a tristimulus value corresponding to the light spectrum according to the light spectrum;
and the control sub-module is also used for determining the color of the target light according to the tristimulus values and controlling the light-emitting equipment to emit the light of the color of the target light.
Optionally, when the number of the light emitting devices is multiple, the mapping module is configured to:
mapping the processed sound frequency spectrum to a preset optical frequency spectrum range to obtain a target optical frequency spectrum;
determining a light spectrum corresponding to each light-emitting device from the target light spectrum according to the light spectrum range corresponding to each light-emitting device;
the control module is used for controlling the light effect of the light-emitting equipment according to the light frequency spectrum corresponding to the light-emitting equipment aiming at each light-emitting equipment.
According to the technical scheme, the audio signal of the audio and video file is firstly acquired, the audio signal is converted into the sound frequency spectrum, the sound frequency spectrum comprises a plurality of frequency windows, each frequency window corresponds to the audio signal of one frequency band, then the plurality of frequency windows are subjected to normalization processing, the processed sound frequency spectrum is mapped to the preset optical frequency spectrum range, the light frequency spectrum corresponding to the light-emitting device is obtained, and finally the light effect of the light-emitting device is controlled according to the light frequency spectrum. According to the method, the audio signal is converted into the sound frequency spectrum, the sound frequency spectrum is mapped to obtain the corresponding light frequency spectrum, the sound and the light effect of the light-emitting device are connected in a frequency domain, and the light effect is controlled through the change of the sound frequency spectrum, so that the light effect of the light-emitting device is controlled in real time according to the sound, the linkage of the sound and the light-emitting device is improved, and the light effect of the light-emitting device is enriched.
Additional features and advantages of the disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:
FIG. 1 is a flow chart illustrating a light control method according to an exemplary embodiment;
FIG. 2 is a schematic diagram of a sound spectrum shown in accordance with an exemplary embodiment;
FIG. 3 is a flow chart illustrating another light control method according to an exemplary embodiment;
FIG. 4 is a flow chart illustrating one step 104 of the embodiment shown in FIG. 1;
FIG. 5 is a flow chart illustrating another light control method according to an exemplary embodiment;
FIG. 6 is a flow chart illustrating yet another light control method according to an exemplary embodiment;
FIG. 7 is a block diagram illustrating a light control device according to an exemplary embodiment;
FIG. 8 is a block diagram of another light control device shown in accordance with an exemplary embodiment;
FIG. 9 is a block diagram of a control module shown in the embodiment of FIG. 7;
FIG. 10 is a block diagram illustrating an electronic device in accordance with an example embodiment.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
Before introducing the light control method, the light control apparatus, the storage medium, and the electronic device provided by the present disclosure, an application scenario related to various embodiments of the present disclosure is first introduced, where the application scenario may include an audio playing device and a light emitting device, and the audio playing device may be connected to the light emitting device through a wired connection or a wireless connection. The audio playing device can be a television, a projector, a sound box, a mobile phone, a tablet computer and other devices capable of making sound. The light emitting device may be any light emitting device capable of adjusting light, for example, the light emitting device may be a lamp supporting a light adjusting function, and a lamp having three RGB beads or four RGBW beads may be generally used as the light emitting device.
Fig. 1 is a flow chart illustrating a light control method according to an exemplary embodiment. As shown in fig. 1, the method may include the steps of:
Illustratively, in order to improve the linkage of the sound emitted by the audio playing device and the light emitting device and enrich the light effect of the light emitting device, the light effect of the light emitting device can be controlled by establishing a link between the sound and the light effect and through the link. There are many ways to establish the connection between the sound and the light effect, and one way to achieve this is to use a frequency spectrum to establish the connection between the sound and the light effect. Specifically, the audio signal may be obtained by reading an audio/video file being played or about to be played by the audio playing device. The audio/video file may be a file containing audio or video, and the audio signal may be a signal corresponding to sound emitted by the audio playing device playing the audio, or may be a signal corresponding to sound in the video when the audio playing device playing the video.
In this step, the audio signal can be converted into a discrete sound spectrum by FFT (Fast Fourier transform, chinese) in a sound frequency range according to a specified frequency interval. The sound spectrum may include a plurality of frequency bins (one frequency Bin may be represented by Bin), and when the sound spectrum includes 30 bins, the sound spectrum may be as shown in fig. 2, where each rectangle in the vertical direction in fig. 2 represents one Bin.
For example, the audible frequency range of sound is 20-20K Hz and the optical spectrum range of visible light is 380-700nm, so that the sound frequency range and the optical spectrum range have different sizes and units, and in order to establish the connection between the sound and the lamp effect, a frequency spectrum mapping is required to map the sound and the lamp effectThe effects are linked in the frequency domain. Specifically, first, normalization processing may be performed on a plurality of frequency windows included in the sound spectrum according to the sound frequency range, so as to obtain a processed sound spectrum. Taking fig. 2 as an example for explanation, the abscissa of the sound spectrum in fig. 2 may be normalized to 0-1, then the interval of each Bin becomes 1/(30-1) ═ 0.0345, then the abscissa of the first Bin on the left in fig. 2 becomes 0, the abscissa of the second Bin on the left becomes 0.0345, the abscissa of the third Bin on the left becomes 0.0690, and so on, and the abscissa of the last Bin becomes 1, and then the normalized data of each Bin may be represented as N (f) (f is the normalized data of each Bin)1)，f1Is the abscissa of Bin after normalization.
The processed sound spectrum may then be mapped to an optical spectral range to obtain a light spectrum. For example, when the optical spectrum range is 380-700nm, the abscissa f of each Bin after mapping2＝f1The lamp spectrum can be S (f) by 700 + 380) +3802) To indicate.
And 104, controlling the lamp effect of the light-emitting equipment according to the lamp light frequency spectrum.
In this step, the lamp efficiency of the lighting device may be determined according to the lamp light spectrum. The light effect may include a light color, a light brightness, a flashing frequency, and the like. For example, the light spectrum is first passed, the tristimulus value corresponding to the light spectrum is determined, and the light color is determined according to the tristimulus value. For another example, the light spectrum may be input into a pre-trained light effect model to obtain the light color, light brightness, and flicker frequency output by the light effect model. Then, according to the determined lamp effect, light adjustment can be performed on the light-emitting device, so that the light-emitting device emits light corresponding to the lamp effect.
In summary, in the present disclosure, an audio signal of an audio/video file is first obtained, and the audio signal is converted into a sound spectrum, where the sound spectrum includes a plurality of frequency windows, each frequency window corresponds to an audio signal of one frequency band, then normalization processing is performed on the plurality of frequency windows, the processed sound spectrum is mapped to a preset optical spectrum range, a light spectrum corresponding to a light-emitting device is obtained, and finally, a light effect of the light-emitting device is controlled according to the light spectrum. According to the method, the audio signal is converted into the sound frequency spectrum, the sound frequency spectrum is mapped to obtain the corresponding light frequency spectrum, the sound and the light effect of the light-emitting device are connected in a frequency domain, and the light effect is controlled through the change of the sound frequency spectrum, so that the light effect of the light-emitting device is controlled in real time according to the sound, the linkage of the sound and the light-emitting device is improved, and the light effect of the light-emitting device is enriched.
Alternatively, the frequency intervals of the respective frequency windows in the plurality of frequency windows may be the same or different, and the arrangement order of the plurality of frequency windows may be changed according to the instruction.
For example, in the process of converting an audio signal into a sound spectrum, a user may adjust the frequency intervals of the frequency windows by adjusting the specified frequency intervals according to actual needs, so that the frequency intervals of the frequency windows are different, and of course, the frequency intervals of the frequency windows may also be the same. By the mode, the sound spectrum can be changed, so that the light spectrum obtained by mapping the sound spectrum is changed, and further the lamp effect of the light-emitting device is adjusted. Meanwhile, if the user is not satisfied with the light effect of the light emitting device, a corresponding adjustment instruction may be sent according to actual needs to adjust the arrangement order of the multiple frequency windows (for example, the first 10 bins and the last 10 bins in fig. 2 may be exchanged for positions), so that the light spectrum is changed, and further, the light effect of the light emitting device is adjusted.
Fig. 3 is a flow chart illustrating another light control method according to an exemplary embodiment. As shown in fig. 3, the lamp effect may include a lamp brightness and a flicker frequency, and the method may further include:
and 105, determining the audio information of the audio and video file according to the audio signal. Wherein the audio information comprises at least one of an audio type, an audio tempo, and an audio style.
For example, after the audio signal is acquired, feature extraction may be performed on the audio signal, and the audio information of the audio-video file may be determined according to the extracted audio feature. Wherein the audio information may comprise at least one of an audio type, an audio tempo, and an audio style. For example, the audio types may include song audio, movie audio, and broadcast audio, etc., the audio tempos may include slow tempos and fast tempos, the audio styles may include lyric styles, pop styles, and classical styles, etc. The manner of determining the audio information may be: and inputting the audio characteristics into a pre-trained analysis model, analyzing and processing the audio characteristics by the analysis model, and outputting the audio type, the audio rhythm and the audio style of the audio and video file.
And 106, determining the target lamp brightness and the target flicker frequency according to the audio information, and controlling the light-emitting device according to the target lamp brightness and the target flicker frequency.
In this step, the target light brightness and the target flicker frequency may be determined according to the audio information and by using a preset correspondence between the audio information and the light brightness and the flicker frequency, and the light emitting device may be controlled to emit the light with the light brightness being the target light brightness and the flicker frequency being the target flicker frequency according to the target light brightness and the target flicker frequency.
Fig. 4 is a flow chart illustrating one step 104 of the embodiment shown in fig. 1. As shown in fig. 4, the light effect includes a color of the light, and step 104 may include the steps of:
and step 1041, determining a tristimulus value corresponding to the light spectrum according to the light spectrum.
And 1042, determining the color of the target light according to the tristimulus values, and controlling the light-emitting equipment to emit light with the color of the target light.
For example, when the light effect only includes the light color, the light spectrum may be obtained and the corresponding tristimulus values (which may be represented by X, Y and Z) may be determined according to the light spectrum. Tristimulus values X, Y, Z are the hypothetical three primary colors defined in CIE1931 that can describe the colors seen by the human eye. The response curves for tristimulus X, Y, Z are:
wherein, calculating the tristimulus value is to calculate S (f)2) Substitution into
By integration (accumulation), i.e.
Secondly, the color information of the target light color can be determined according to the tristimulus values. The color information may include, among other things, hue, saturation, and brightness. Specifically, the color information may be determined by calculating color coordinates, which may be calculated, for example, by the following formula:
and L is Y. Where (x, y) is the color coordinate corresponding to the sound spectrum, the corresponding color and the hue and saturation of the color can be found in the CIE1931 color gamut diagram (the color gamut diagram only represents the hue and saturation of the color) through (x, y), and L is the brightness of the color. Then, the lighting device may be controlled to emit the target lighting color indicated by the color information according to the hue, saturation and brightness of the lighting color included in the color information.
In another implementation manner, when the light effect only includes the light color, after the light spectrum is obtained, the multiple frequency windows may be grouped according to a preset rule to obtain a set of a specified number of frequency windows, and for each set of frequency windows, the target response value corresponding to the set of frequency windows is determined. Each frequency bin set may include at least one frequency bin, and the target response value corresponding to each frequency bin set is an accumulated value of the audio response corresponding to each frequency bin in the frequency bin set. The target light color may then be determined from the target response values of the respective sets of frequency windows and the light emitting device may be controlled to emit light of the target light color. For example, the plurality of frequency bins may be simply divided into three sets of frequency bins according to low frequency, medium frequency, and high frequency, and the target response values of the three sets of frequency bins may be respectively used as R, G, B values. Then, the color corresponding to the RGB value may be used as the target lighting color, and the lighting device is controlled to emit light of the target lighting color.
It should be noted that, as can be seen from the three response curves of the tristimulus values, X is mainly provided in red, Y is mainly provided in green, and Z is mainly provided in blue, which correspond to the high, medium, and low frequencies of the sound, respectively, and if the user is not satisfied with the correspondence between the colors and the sound frequencies, the correspondence can be changed by adjusting the distribution of the sound spectrum. For example, Bin may be transposed in the sound spectrum, or even the entire sound spectrum may be shuffled and recombined, and then subjected to spectrum mapping.
Fig. 5 is a flow chart illustrating another light control method according to an exemplary embodiment. As shown in fig. 5, before step 103, the method may further include the steps of:
In one scenario, the audio playing device plays the sound emitted by the audio/video file, and may only respond at a specific frequency, and at this time, the light effect of the light emitting device is single, which may affect the user experience. For example, when the light effect only includes the light color, if the audio playing device plays the human voice all the time, only the middle and low part of the sound spectrum has audio response, and the high voice has almost no audio response, then the light color emitted by the lighting device may only have blue and green color all the time, and not have red color. In order to avoid such a situation, when the volume of the audio/video file played by the audio playing device is small (for example, the audio/video file of music or short video), the audio signal of the whole audio/video file is obtained in a pre-reading manner, and the audio signal is converted into a sound spectrum through FFT in a sound frequency range according to a specified frequency interval, so as to obtain the sound spectrum corresponding to the whole audio file. The audio response for each frequency window may then be determined from the sound spectrum.
A first frequency window is determined from the plurality of frequency windows based on the audio response, step 108. The first frequency window is a frequency window of which the corresponding audio response meets a first preset audio response condition.
Further, after determining the audio response corresponding to each frequency window, a first frequency window satisfying a first preset audio response condition may be determined from the plurality of frequency windows according to the audio response, where the first preset audio response condition may be that the audio response is smaller than the preset audio response. Then, the sound spectrum may be updated according to the first frequency window, so as to remove a frequency band corresponding to the first frequency window in the sound spectrum (i.e., when the audio response of a certain frequency band is low, the frequency band is removed from the sound spectrum), and obtain the updated first sound spectrum. Then, the updated first sound spectrum may be mapped to a preset light spectrum range after normalization processing, so as to obtain a corresponding light spectrum. Through the mode, the whole sound frequency spectrum can be uniformly distributed as much as possible, so that the light effect of the light-emitting device is richer, and the use experience of a user is improved.
Fig. 6 is a flow chart illustrating yet another light control method according to an exemplary embodiment. As shown in fig. 6, before step 103, the method may further include the steps of:
In another scenario, when the audio/video file played by the audio playing device is large in size or the audio playing device plays real-time live audio, the sound spectrum condition of the whole playing process cannot be predicted. At this time, an initial weight may be set for each frequency window in advance, the initial weight of each frequency window is 1, and then the audio signal of the audio/video file is continuously acquired according to a specified period in the playing process, and is converted into a sound spectrum corresponding to each specified period. For example, when the audio/video file is an audio with a duration of 1min, an audio signal of 15ms played by the audio playing device may be continuously obtained and converted into a sound spectrum, with 15ms as a specified period. The audio response corresponding to each frequency window may then be determined based on the spectral distribution of the sound spectrum.
And step 112, updating the second frequency window according to the target weight and the second frequency window to obtain an updated second audio frequency spectrum. Wherein the target weight is used to adjust the audio response corresponding to the second frequency window.
Further, after determining the audio response corresponding to each frequency window, a second frequency window satisfying a second preset audio response condition may be determined from the plurality of frequency windows according to the audio response. The second preset audio response condition may be that the second preset audio response condition is smaller than the preset audio response condition within the preset time length. Then, for each second frequency window, the initial weight of the second frequency window may be increased to obtain a target weight of the second frequency window, and a product of the target weight of the second frequency window and the audio response of the second frequency window is used as a new audio response of the second frequency window (i.e., the audio response corresponding to the second frequency window is increased), so as to obtain an updated second audio spectrum.
In addition, when the initial weight of the second frequency window is increased, a weight threshold may be set, and when the target weight of a certain second frequency window is greater than the weight threshold, it indicates that the second frequency window has almost no audio response, and the frequency band corresponding to the second frequency window may be removed from the sound spectrum. If the audio response of the second frequency window continues to appear later, the target weight of the second frequency window may be decreased again, and the frequency band corresponding to the second frequency window may be restored in the sound spectrum. Alternatively, tristimulus values X, Y, Z may be multiplied by an initial weight, wherein the initial weight of tristimulus values X, Y, Z is 1, and when one (or a ratio of two) of tristimulus values X, Y, Z is low for a duration, the initial weight of the one (or both) may be increased.
Alternatively, when the light emitting device is plural, the step 103 may include the steps of:
and a), mapping the processed sound frequency spectrum to a preset optical frequency spectrum range to obtain a target optical frequency spectrum.
And b), determining the light spectrum corresponding to each light-emitting device from the target light spectrum according to the light spectrum range corresponding to each light-emitting device.
Step 104 may be implemented by:
and for each light-emitting device, controlling the light effect of the light-emitting device according to the light spectrum corresponding to the light-emitting device.
For example, when there are a plurality of light emitting devices, the light effect of each light emitting device can be controlled individually to improve the user experience. Specifically, the user may preset a light spectrum range corresponding to each light emitting device according to actual needs. There are multiple implementations of setting the light spectrum range corresponding to each light-emitting device, and one implementation is as follows: all the frequency windows after the normalization processing are allocated to a plurality of light-emitting devices in a spectrum allocation manner (for example, an even frequency window in all the frequency windows may be allocated to one light-emitting device, and an odd frequency window in all the frequency windows may be allocated to another light-emitting device), and the frequency window allocated to each light-emitting device is mapped to an optical spectrum range, so as to obtain a lamp light spectrum range corresponding to the light-emitting device.
Then, the normalized sound spectrum may be mapped to an optical spectrum range to obtain a target optical spectrum, and then, for each light-emitting device, a light spectrum corresponding to the light-emitting device may be determined from the target optical spectrum according to a light spectrum range corresponding to the light-emitting device, and a light effect of the light-emitting device may be controlled according to the light spectrum corresponding to the light-emitting device.
In summary, in the present disclosure, an audio signal of an audio/video file is first obtained, and the audio signal is converted into a sound spectrum, where the sound spectrum includes a plurality of frequency windows, each frequency window corresponds to an audio signal of one frequency band, then normalization processing is performed on the plurality of frequency windows, the processed sound spectrum is mapped to a preset optical spectrum range, a light spectrum corresponding to a light-emitting device is obtained, and finally, a light effect of the light-emitting device is controlled according to the light spectrum. According to the method, the audio signal is converted into the sound frequency spectrum, the sound frequency spectrum is mapped to obtain the corresponding light frequency spectrum, the sound and the light effect of the light-emitting device are connected in a frequency domain, and the light effect is controlled through the change of the sound frequency spectrum, so that the light effect of the light-emitting device is controlled in real time according to the sound, the linkage of the sound and the light-emitting device is improved, and the light effect of the light-emitting device is enriched.
Fig. 7 is a block diagram illustrating a light control device according to an exemplary embodiment. As shown in fig. 7, the apparatus 200 includes:
the obtaining module 201 is configured to obtain an audio signal of an audio/video file.
The conversion module 202 is configured to convert the audio signal into a sound spectrum. The sound spectrum comprises a plurality of frequency windows, and each frequency window corresponds to an audio signal of one frequency band.
The mapping module 203 is configured to perform normalization processing on the multiple frequency windows, and map the processed sound spectrum to a preset light spectrum range to obtain a light spectrum corresponding to the light-emitting device.
And the control module 204 is used for controlling the lamp effect of the light-emitting device according to the lamp light spectrum.
Alternatively, the frequency spacing of each of the plurality of frequency bins may be the same or different.
The arrangement order of the plurality of frequency windows may be changed according to the instruction.
Optionally, the light effect includes a light brightness and a flicker frequency, and the control module 204 is further configured to:
and determining audio information of the audio and video file according to the audio signal, wherein the audio information comprises at least one of audio type, audio rhythm and audio style.
And determining the target lamp brightness and the target flicker frequency according to the audio information, and controlling the light-emitting device according to the target lamp brightness and the target flicker frequency.
Fig. 8 is a block diagram illustrating another light control device according to an example embodiment. As shown in fig. 8, the apparatus 200 further includes:
the determining module 205 is configured to determine, according to the sound spectrum, an audio response corresponding to each frequency window before mapping the processed sound spectrum to a preset optical spectrum range to obtain a light spectrum corresponding to the light-emitting device.
The determining module 205 is further configured to determine, according to the audio response, a first frequency window from the multiple frequency windows, where the first frequency window is a frequency window whose corresponding audio response satisfies a first preset audio response condition.
The updating module 206 is configured to update the sound spectrum according to the first frequency window to remove a frequency band corresponding to the first frequency window in the sound spectrum, so as to obtain an updated first sound spectrum.
Optionally, the determining module 205 is further configured to determine, according to the sound spectrum, an audio response corresponding to each frequency window before mapping the processed sound spectrum to a preset light spectrum range to obtain a light spectrum corresponding to the lighting device.
The determining module 205 is further configured to determine, according to the audio response, a second frequency window from the multiple frequency windows, where the second frequency window is a frequency window whose corresponding audio response satisfies a second preset audio response condition.
The updating module 206 is further configured to update the second frequency window according to the target weight and the second frequency window to obtain an updated second audio spectrum, where the target weight is used to adjust an audio response corresponding to the second frequency window.
FIG. 9 is a block diagram of a control module shown in the embodiment of FIG. 7. As shown in fig. 9, the light effect includes a light color, and the control module 204 includes:
the grouping submodule 2041 is configured to group multiple frequency windows according to a preset rule to obtain a specified number of frequency window sets, where each frequency window set includes at least one frequency window.
The determining submodule 2042 is configured to determine, for each frequency window set, that the frequency window set corresponds to a target response value. The target response value corresponding to each frequency window set is an accumulated value of the audio response corresponding to each frequency window in the frequency window set.
And the control submodule 2043 is configured to determine a target lighting color according to the target response value of each frequency window set, and control the light emitting device to emit light of the target lighting color.
Optionally, the light effect includes a light color, and the determining submodule 2042 is further configured to determine a tristimulus value corresponding to the light spectrum according to the light spectrum.
The control sub-module 2043 is further configured to determine a target light color according to the tristimulus values, and control the light-emitting device to emit light of the target light color.
Optionally, when the number of the light emitting devices is multiple, the mapping module 203 is configured to:
and mapping the processed sound frequency spectrum to a preset optical frequency spectrum range to obtain a target optical frequency spectrum.
And determining the light spectrum corresponding to each light-emitting device from the target light spectrum according to the light spectrum range corresponding to each light-emitting device.
The control module 204 is configured to, for each light-emitting device, control a lamp efficiency of the light-emitting device according to a lamp light spectrum corresponding to the light-emitting device.
With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
In summary, in the present disclosure, an audio signal of an audio/video file is first obtained, and the audio signal is converted into a sound spectrum, where the sound spectrum includes a plurality of frequency windows, each frequency window corresponds to an audio signal of one frequency band, then normalization processing is performed on the plurality of frequency windows, the processed sound spectrum is mapped to a preset optical spectrum range, a light spectrum corresponding to a light-emitting device is obtained, and finally, a light effect of the light-emitting device is controlled according to the light spectrum. According to the method, the audio signal is converted into the sound frequency spectrum, the sound frequency spectrum is mapped to obtain the corresponding light frequency spectrum, the sound and the light effect of the light-emitting device are connected in a frequency domain, and the light effect is controlled through the change of the sound frequency spectrum, so that the light effect of the light-emitting device is controlled in real time according to the sound, the linkage of the sound and the light-emitting device is improved, and the light effect of the light-emitting device is enriched.
Fig. 10 is a block diagram illustrating an electronic device 700 in accordance with an example embodiment. As shown in fig. 10, the electronic device 700 may include: a processor 701 and a memory 702. The electronic device 700 may also include one or more of a multimedia component 703, an input/output (I/O) interface 704, and a communication component 705.
The processor 701 is configured to control the overall operation of the electronic device 700, so as to complete all or part of the steps in the light control method. The memory 702 is used to store various types of data to support operation at the electronic device 700, such as instructions for any application or method operating on the electronic device 700 and application-related data, such as contact data, transmitted and received messages, pictures, audio, video, and the like. The Memory 702 may be implemented by any type of volatile or non-volatile Memory device or combination thereof, such as Static Random Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read-Only Memory (EPROM), Programmable Read-Only Memory (PROM), Read-Only Memory (ROM), magnetic Memory, flash Memory, magnetic disk, or optical disk. The multimedia components 703 may include screen and audio components. Wherein the screen may be, for example, a touch screen and the audio component is used for outputting and/or inputting audio signals. For example, the audio component may include a microphone for receiving external audio signals. The received audio signal may further be stored in the memory 702 or transmitted through the communication component 705. The audio assembly also includes at least one speaker for outputting audio signals. The I/O interface 704 provides an interface between the processor 701 and other interface modules, such as a keyboard, mouse, buttons, etc. These buttons may be virtual buttons or physical buttons. The communication component 705 is used for wired or wireless communication between the electronic device 700 and other devices. Wireless Communication, such as Wi-Fi, bluetooth, Near Field Communication (NFC), 2G, 3G, 4G, NB-IOT, eMTC, or other 5G, etc., or a combination of one or more of them, which is not limited herein. The corresponding communication component 705 may thus include: Wi-Fi module, Bluetooth module, NFC module, etc.
In an exemplary embodiment, the electronic Device 700 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components for performing the light control method described above.
In another exemplary embodiment, a computer readable storage medium comprising program instructions which, when executed by a processor, implement the steps of the light control method described above is also provided. For example, the computer readable storage medium may be the memory 702 comprising program instructions executable by the processor 701 of the electronic device 700 to perform the light control method described above.
In another exemplary embodiment, a computer program product is also provided, which comprises a computer program executable by a programmable apparatus, the computer program having code portions for performing the above-mentioned light control method when executed by the programmable apparatus.
The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.
It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.
Claims (11)
1. A light control method, the method comprising:
acquiring an audio signal of an audio/video file;
converting the audio signal into a sound spectrum; the sound spectrum comprises a plurality of frequency windows, and each frequency window corresponds to an audio signal of one frequency band;
normalizing the frequency windows, and mapping the processed sound frequency spectrum to a preset light frequency spectrum range to obtain a light frequency spectrum corresponding to the light-emitting device;
and controlling the lamp effect of the light-emitting equipment according to the lamp light frequency spectrum.
2. The method of claim 1, wherein:
the frequency intervals of each of the plurality of frequency bins may be the same or different;
the arrangement order of the plurality of frequency windows may be changed according to an instruction.
3. The method of claim 1, wherein the lamp effect comprises a lamp brightness and a flicker frequency, the method further comprising:
determining the audio information of the audio and video file according to the audio signal; the audio information comprises at least one of an audio type, an audio rhythm and an audio style;
and determining the target light brightness and the target flicker frequency according to the audio information, and controlling the light-emitting equipment according to the target light brightness and the target flicker frequency.
4. The method according to claim 1, wherein before the mapping the processed sound spectrum to the predetermined optical spectrum range to obtain the light spectrum corresponding to the lighting device, the method further comprises:
determining an audio response corresponding to each frequency window according to the sound frequency spectrum;
determining a first frequency window from the multiple frequency windows according to the audio response, wherein the first frequency window is a frequency window of which the corresponding audio response meets a first preset audio response condition;
and updating the sound spectrum according to the first frequency window to remove the frequency band corresponding to the first frequency window in the sound spectrum, so as to obtain an updated first sound spectrum.
5. The method according to claim 1, wherein before the mapping the processed sound spectrum to the predetermined optical spectrum range to obtain the light spectrum corresponding to the lighting device, the method further comprises:
determining an audio response corresponding to each frequency window according to the sound frequency spectrum;
determining a second frequency window from the plurality of frequency windows according to the audio response, wherein the second frequency window is a frequency window of which the corresponding audio response meets a second preset audio response condition;
updating the second frequency window according to the target weight and the second frequency window to obtain an updated second audio frequency spectrum; the target weight is used to adjust the audio response corresponding to the second frequency window.
6. The method of claim 1, wherein the light effect comprises a color of light, and wherein controlling the light effect of the light emitting device according to the light spectrum comprises:
grouping the frequency windows according to a preset rule to obtain a specified number of frequency window sets, wherein each frequency window set comprises at least one frequency window;
for each frequency window set, determining a target response value corresponding to the frequency window set; the target response value corresponding to each frequency window set is the accumulated value of the audio response corresponding to each frequency window in the frequency window set;
and determining a target light color according to the target response value of each frequency window set, and controlling the light-emitting equipment to emit light with the target light color.
7. The method of claim 1, wherein the light effect comprises a color of light, and wherein controlling the light effect of the light emitting device according to the light spectrum comprises:
determining a tristimulus value corresponding to the lamplight frequency spectrum according to the lamplight frequency spectrum;
and determining the color of target light according to the tristimulus values, and controlling the light-emitting equipment to emit light of the color of the target light.
8. The method according to claim 1, wherein when there are a plurality of lighting devices, the mapping the processed sound spectrum to a preset light spectrum range to obtain a light spectrum corresponding to the lighting device comprises:
mapping the processed sound frequency spectrum to a preset optical frequency spectrum range to obtain a target optical frequency spectrum;
determining a light spectrum corresponding to each light-emitting device from the target light spectrum according to the light spectrum range corresponding to each light-emitting device;
the lamp effect of controlling the light-emitting device according to the lamp light frequency spectrum comprises:
and aiming at each light-emitting device, controlling the light effect of the light-emitting device according to the light spectrum corresponding to the light-emitting device.
9. A light control device, the device comprising:
the acquisition module is used for acquiring an audio signal of the audio/video file;
the conversion module is used for converting the audio signal into a sound frequency spectrum; the sound spectrum comprises a plurality of frequency windows, and each frequency window corresponds to an audio signal of one frequency band;
the mapping module is used for carrying out normalization processing on the frequency windows and mapping the processed sound frequency spectrum to a preset optical frequency spectrum range to obtain a light frequency spectrum corresponding to the light-emitting device;
and the control module is used for controlling the lamp effect of the light-emitting equipment according to the lamplight frequency spectrum.
10. A non-transitory computer readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 8.
11. An electronic device, comprising:
a memory having a computer program stored thereon;
a processor for executing the computer program in the memory to carry out the steps of the method of any one of claims 1 to 8.
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