CN108989706A - The method and device of special efficacy is generated based on music rhythm - Google Patents
The method and device of special efficacy is generated based on music rhythm Download PDFInfo
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- CN108989706A CN108989706A CN201710408359.6A CN201710408359A CN108989706A CN 108989706 A CN108989706 A CN 108989706A CN 201710408359 A CN201710408359 A CN 201710408359A CN 108989706 A CN108989706 A CN 108989706A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
- H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
- H04N5/265—Mixing
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T11/00—2D [Two Dimensional] image generation
- G06T11/001—Texturing; Colouring; Generation of texture or colour
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
- G10H1/00—Details of electrophonic musical instruments
- G10H1/36—Accompaniment arrangements
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
- G10H1/00—Details of electrophonic musical instruments
- G10H1/36—Accompaniment arrangements
- G10H1/40—Rhythm
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Multimedia (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Studio Circuits (AREA)
Abstract
The invention belongs to video production technical fields, more particularly to a kind of method and device for generating special efficacy based on music rhythm, wherein this method comprises: extracting the pulse code modulation data of one section of music, performed mathematical calculations to the pulse code modulation data extracted to obtain representing the numerical value of the rhythm of this section of music；Special efficacy is driven using the numerical value for representing music rhythm；Wherein, the special efficacy includes but is not limited to the special efficacys such as paintbrush, picture, vibration.The present invention, so that one section of special effect of video can be changed with audio cadence, meets the individual demand of user by introducing audio dimension on the basis of graph and image processing.
Description
Technical field
The invention belongs to video production technical field, more particularly to it is a kind of based on music rhythm generate special efficacy method and
Device.
Background technique
Special video effect processing in the prior art is mostly based on graph and image processing technology, carries out to single-frame images itself real-time
Processing is to generate specific special effect, and the special efficacy of generation is generally only the repeating effect of a period of time content, and special efficacy performance is single
Homogeneity is not able to satisfy the individual demand of user.
Summary of the invention
The purpose of the present invention is to provide a kind of method and devices that special efficacy is generated based on music rhythm, by special efficacy and music
Tempo variation combines, and the result for enabling each special efficacy occur is all different, and meaningful variation, and nonrandom mixed and disorderly
It carries out.
The present invention provides a kind of methods for generating special efficacy based on music rhythm, comprising:
Extract the pulse code modulation data of one section of music；
It is performed mathematical calculations to the pulse code modulation data extracted to obtain representing the numerical value of the rhythm of this section of music；
Special efficacy is driven using the numerical value for representing music rhythm.
Further, it performs mathematical calculations to the pulse code modulation data extracted to obtain representing the section of this section of music
The numerical value played includes:
The root mean square or variance for calculating the pulse code modulation data of audio merging sample obtain the virtual value of sample；Its
In, the audio merges sample and carries out mixing acquisition by several samples by multiple sound channels.
Further, the root mean square or variance for calculating the pulse code modulation data of audio merging sample obtain having for sample
Before valid value further include: merge sample to the audio and carry out low-pass filtering.
Further, the root mean square or variance for calculating the pulse code modulation data of audio merging sample obtain having for sample
After valid value further include: carry out exponential smoothing to the virtual value of sample to obtain representing the numerical value of the rhythm of this section of music.
Further, which is the Butterworth characteristic second-order low-pass filter with cutoff frequency.
Further, which includes paintbrush special efficacy and picture special efficacy.
Further, which includes becoming the line weight that paintbrush is drawn in video
Change or color changes.
Further, which includes that picture in video is made to zoom in and out or occur color change according to music rhythm
Change.
Further, which includes shaking the equipment of broadcasting music or video.
The present invention also provides a kind of devices that special efficacy is generated based on music rhythm, comprising:
Extraction module, for extracting the pulse code modulation data of one section of music；
Computing module, for being performed mathematical calculations to the pulse code modulation data extracted to obtain representing this section of music
Rhythm numerical value；
Rendering module, for driving special efficacy using the numerical value for representing music rhythm.
Further, which is specifically used for:
The root mean square or variance for calculating the pulse code modulation data of audio merging sample obtain the virtual value of sample；Its
In, audio merges sample and carries out mixing acquisition by several samples by multiple sound channels.
Further, further include filter module in the computing module, the filter module be used for the audio merge sample into
Row low-pass filtering.
Further, which is also used to: carrying out exponential smoothing to the virtual value of sample to obtain representing the Duan Yin
The numerical value of happy rhythm.
Further, which uses the Butterworth characteristic second-order low-pass filter with cutoff frequency.
Further, which includes paintbrush FX Module and picture FX Module.
Further, which is used to that the line weight that paintbrush is drawn in video to be made to send out according to music rhythm
Changing or color change.
Further, which is used to make picture in video zoom in and out or occur face according to music rhythm
Color change.
Further, rendering module is used to play music according to music rhythm or the equipment of video shakes.
The present invention also provides a kind of computer readable storage mediums, are stored thereon with computer program, which is located
Reason device can be realized the method that preceding claim generates special efficacy based on music rhythm when executing.
Advantages of the present invention and its effect are made by introducing audio dimension (element) on the basis of graph and image processing
Obtaining one section of special effect of video will not be unalterable, and can change with audio cadence, and strong beat shows strong
Special effect, weak beat show weak special effect, meet the individual demand of user.
Detailed description of the invention
Fig. 1 is the flow chart that the method for special efficacy is generated the present invention is based on music rhythm；
Fig. 2 is the structural block diagram that the device of method of special efficacy is generated the present invention is based on music rhythm；
Fig. 3 is the flow chart that one preferred embodiment of method of special efficacy is generated the present invention is based on music rhythm.
Specific embodiment
The present invention is described in further detail below through specific implementation examples and in conjunction with the accompanying drawings.
Join and present embodiments provide a kind of method that special efficacy is generated based on music rhythm shown in Fig. 1, comprising:
Step S1 extracts the pulse code modulation data of one section of music；
S2 is walked, is performed mathematical calculations to the pulse code modulation data extracted to obtain representing the rhythm of this section of music
Numerical value；
Step S3 drives special efficacy using the numerical value for representing music rhythm.
In the present embodiment, step S2 includes:
The root mean square or variance for calculating the pulse code modulation data of audio merging sample obtain the virtual value of sample；Its
In, the audio merges sample and carries out mixing acquisition by several samples by multiple sound channels.
In the present embodiment, the root mean square or variance for calculating the pulse code modulation data of audio merging sample obtain sample
Virtual value before further include: to the audio merge sample carry out low-pass filtering.In the present embodiment, which is that band is cut
The only Butterworth characteristic second-order low-pass filter of frequency.Low-pass filtering is added before calculating root mean square or variance may filter that height
Frequency signal, the noise data for avoiding high-frequency signal from coming in subsequent calculating process.
In the present embodiment, the root mean square or variance for calculating the pulse code modulation data of audio merging sample obtain sample
Virtual value after further include: exponential smoothing is carried out to obtain representing the numerical value of the rhythm of this section of music to the virtual value of sample.
Single exponential smoothing is carried out to virtual value after calculating root mean square or variance, accuracy in computation can be promoted, preferably react sound
Happy rhythm.
In the present embodiment, which includes paintbrush special efficacy and picture special efficacy, including is made in video according to music rhythm
The line weight that paintbrush is drawn changes or color changes.The picture special efficacy includes being made in video according to music rhythm
Picture zooms in and out or occurs color change.The special efficacy includes that the equipment for playing music or video occurs
Vibration.
The present embodiment provides change the method for generating special efficacy based on music rhythm to introduce on the basis of graph and image processing
Audio dimension (element), so that one section of special effect of video will not be unalterable, and can change with audio cadence,
Strong beat shows strong special effect, and weak beat shows weak special effect, meets the individual demand of user.
Join shown in Fig. 2, the present embodiment additionally provides a kind of device that special efficacy is generated based on music rhythm, comprising:
Extraction module 10, for extracting the pulse code modulation data of one section of music；
Computing module 20, for being performed mathematical calculations to the pulse code modulation data extracted to obtain representing the Duan Yin
The numerical value of happy rhythm；
Rendering module 30, for driving special efficacy using the numerical value for representing music rhythm.
In the present embodiment, computing module 20 is specifically used for:
The root mean square or variance for calculating the pulse code modulation data of audio merging sample obtain the virtual value of sample；Its
In, audio merges sample and carries out mixing acquisition by several samples by multiple sound channels.
It in the present embodiment, further include filter module in computing module 20, which is used to merge sample to the audio
This progress low-pass filtering.Filter module may filter that high-frequency signal, the noise for avoiding high-frequency signal from coming in subsequent calculating process
Data.
In the present embodiment, computing module 20 is also used to: carrying out exponential smoothing to the virtual value of sample to obtain representing and be somebody's turn to do
The numerical value of the rhythm of Duan Yinle.Single exponential smoothing is carried out to virtual value after calculating root mean square or variance, calculating can be promoted
Music rhythm is preferably reacted in accuracy.
In the present embodiment, filter module uses the Butterworth characteristic second-order low-pass filter with cutoff frequency.
In the present embodiment, which includes paintbrush FX Module and picture FX Module.
In the present embodiment, which is used to make the lines that paintbrush is drawn in video thick according to music rhythm
It carefully changes or color changes.
In the present embodiment, which is used to make picture in video zoom in and out or send out according to music rhythm
Raw color change.
In the present embodiment, rendering module 30 is used to play music according to music rhythm or the equipment of video is shaken
It is dynamic.
The present embodiment provides the devices for generating special efficacy based on music rhythm to introduce sound on the basis of graph and image processing
Frequency dimension (element) so that one section of special effect of video will not be unalterable, and can change, Qiang Jie with audio cadence
Bat shows strong special effect, and weak beat shows weak special effect, meets the individual demand of user.
The present invention also provides a kind of computer readable storage mediums, are stored thereon with computer program, which is located
Reason device can be realized the method that preceding claim generates special efficacy based on music rhythm when executing.
Join shown in Fig. 3, Fig. 3 shows the preferred embodiment for changing based on music rhythm and generating the method for special efficacy, at this
In embodiment, the input of whole system is the coded audios data such as MP3, AAC, and decoding obtains pulse code modulation data (PCM number
According to).To multiple sound channels, several samples carry out being mixed to get single numerical value, then carry out low-pass filtering, it is therefore an objective to which filtering is high
Frequency signal, the noise data for avoiding high-frequency signal from coming in subsequent calculating process.Then the root mean square for having merged sample is calculated, is obtained
To the virtual value of these samples.Then exponential smoothing is carried out, audio variation is predicted to a certain extent, obtains each sample
This end value, the input as subsequent special efficacy.
For low-pass filtering, which uses the Butterworth characteristic second-order low-pass filter with cutoff frequency and carries out
Low-pass filtering, second-order low-pass filter frequency-domain expression, such as following formula:
In formula, k indicates gain.
It enablesIt substitutes into second-order low-pass filter frequency-domain expression and obtains corresponding second-order low-pass filter
Time-domain expression, such as following formula:
Y (n)=kx (n)+kb1x(n-1)+kb2x(n-2)-a1y(n-1)-a2y(n-2)
For root mean square, calculation formula such as following formula:
For exponential smoothing, complexity to simplify the calculation herein, it is smooth to use first order exponential, specific to calculate such as formula:
st=α xt+(1-α)·st-1
The method and device provided by the invention for changing generation special efficacy based on music rhythm has the following technical effect that
1) by the way that audio element is added, change special efficacy as audio rhythm changes, keep special efficacy and audio rhythm close
In conjunction with.
2) audio cadence is embodied by special video effect, and user is allowed to generate strong visual impact.The form packet of specific special efficacy
It includes: making the picture of video is rhythmical to zoom in or out according to music rhythm；According to music rhythm the picture of video is had
The discoloration of rhythm；According to music rhythm the line weight that paintbrush is drawn in video is changed, color change.
3) audio cadence is used not only for video processing special efficacy, can be also used for the place of any music and user's interaction,
For example mobile phone shakes feedback, i.e. the strong beat of music generates mobile phone vibration feedback.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (19)
1. a kind of method for generating special efficacy based on music rhythm characterized by comprising
Extract the pulse code modulation data of one section of music；
It is performed mathematical calculations to the pulse code modulation data extracted to obtain representing the numerical value of the rhythm of this section of music；
Special efficacy is driven using the numerical value for representing music rhythm.
2. the method according to claim 1 for generating special efficacy based on music rhythm, which is characterized in that the pulse to extracting
Coding modulation data performs mathematical calculations to obtain representing the numerical value of the rhythm of this section of music and include:
The root mean square or variance for calculating the pulse code modulation data of audio merging sample obtain the virtual value of sample；Wherein, institute
It states audio merging sample and carries out mixing acquisition by several samples by multiple sound channels.
3. the method according to claim 2 for generating special efficacy based on music rhythm, which is characterized in that calculate audio and merge sample
The root mean square or variance of this pulse code modulation data obtain before the virtual value of sample further include: merge sample to the audio
This progress low-pass filtering.
4. the method according to claim 2 for generating special efficacy based on music rhythm, which is characterized in that calculate audio and merge sample
The root mean square or variance of this pulse code modulation data obtain after the virtual value of sample further include: to the virtual value of sample into
Row index is smoothly to obtain representing the numerical value of the rhythm of this section of music.
5. the method according to claim 3 for generating special efficacy based on music rhythm, which is characterized in that the low-pass filtering is
Butterworth characteristic second-order low-pass filter with cutoff frequency.
6. the method according to claim 1 for generating special efficacy based on music rhythm, which is characterized in that the special efficacy includes picture
Special efficacy and picture special efficacy.
7. the method according to claim 6 for generating special efficacy based on music rhythm, which is characterized in that the paintbrush special efficacy packet
It includes and makes that the line weight that paintbrush is drawn in video changes or color changes according to music rhythm.
8. the method according to claim 6 for generating special efficacy based on music rhythm, which is characterized in that the picture special efficacy packet
It includes and makes picture in video zoom in and out or occur color change according to music rhythm.
9. the method according to claim 1 for generating special efficacy based on music rhythm, which is characterized in that the special efficacy includes root
According to music rhythm the equipment for playing music or video is shaken.
10. a kind of device for generating special efficacy based on music rhythm characterized by comprising
Extraction module, for extracting the pulse code modulation data of one section of music；
Computing module, for being performed mathematical calculations to the pulse code modulation data extracted to obtain representing the section of this section of music
The numerical value played；
Rendering module, for driving special efficacy using the numerical value for representing music rhythm.
11. the device according to claim 10 for generating special efficacy based on music rhythm, which is characterized in that the computing module
It is specifically used for:
The root mean square or variance for calculating the pulse code modulation data of audio merging sample obtain the virtual value of sample；Wherein, institute
It states audio merging sample and carries out mixing acquisition by several samples by multiple sound channels.
12. the device according to claim 10 for generating special efficacy based on music rhythm, which is characterized in that the computing module
In further include filter module, the filter module be used for the audio merge sample carry out low-pass filtering.
13. the device according to claim 10 based on music rhythm variation special efficacy, which is characterized in that the computing module
It is also used to: exponential smoothing is carried out to obtain representing the numerical value of the rhythm of this section of music to the virtual value of sample.
14. the device according to claim 12 for generating special efficacy based on music rhythm, which is characterized in that the filter module
Using the Butterworth characteristic second-order low-pass filter with cutoff frequency.
15. the device according to claim 10 for generating special efficacy based on music rhythm, which is characterized in that the rendering module
Including paintbrush FX Module and picture FX Module.
16. the device according to claim 15 for generating special efficacy based on music rhythm, which is characterized in that the paintbrush special efficacy
For being made according to music rhythm, the line weight that paintbrush is drawn in video changes module or color changes.
17. the device according to claim 15 for generating special efficacy based on music rhythm, which is characterized in that the picture special efficacy
Module is used to make picture in video zoom in and out or occur color change according to music rhythm.
18. the device according to claim 10 for generating special efficacy based on music rhythm, which is characterized in that the rendering module
For shaking the equipment for playing music or video according to music rhythm.
19. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that the program is by processor
It can be realized method described in any claim in claim 1-9 when execution.
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| WO2022083148A1 (en) * | 2020-10-20 | 2022-04-28 | 北京字节跳动网络技术有限公司 | Special effect display method and apparatus, electronic device, and computer-readable medium |
| CN112954481A (en) * | 2021-02-07 | 2021-06-11 | 脸萌有限公司 | Special effect processing method and device |
| WO2022169418A1 (en) * | 2021-02-07 | 2022-08-11 | 脸萌有限公司 | Special effect processing method and apparatus |
| CN112954481B (en) * | 2021-02-07 | 2023-12-12 | 脸萌有限公司 | Special effect processing method and device |
| US12040000B2 (en) | 2021-02-07 | 2024-07-16 | Lemon Inc. | Special effect processing method and apparatus |
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