CN109545176B - Dynamic echo processing method and device for audio - Google Patents
Dynamic echo processing method and device for audio Download PDFInfo
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- CN109545176B CN109545176B CN201910055026.9A CN201910055026A CN109545176B CN 109545176 B CN109545176 B CN 109545176B CN 201910055026 A CN201910055026 A CN 201910055026A CN 109545176 B CN109545176 B CN 109545176B
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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
- G10H1/361—Recording/reproducing of accompaniment for use with an external source, e.g. karaoke systems
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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
- G10H1/361—Recording/reproducing of accompaniment for use with an external source, e.g. karaoke systems
- G10H1/366—Recording/reproducing of accompaniment for use with an external source, e.g. karaoke systems with means for modifying or correcting the external signal, e.g. pitch correction, reverberation, changing a singer's voice
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- Reverberation, Karaoke And Other Acoustics (AREA)
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Abstract
The application discloses a dynamic echo processing method and device for audio. The method comprises the steps of obtaining the beat of a singing song; and adjusting the echo delay amount of the singing song to be a multiple of the duration time of one beat according to the beat of the singing song. The method and the device solve the technical problem of poor echo processing effect. By the method and the device, echoes are always in time, and the fusion degree of songs is improved. In addition, the application is suitable for singing applications.
Description
Technical Field
The present application relates to the field of audio processing, and in particular, to a dynamic echo processing method and apparatus for audio.
Background
When echo processing is performed in music production or KTV devices, it is usually obtained by delaying the input audio for a fixed time or manually determined time and then multiplying the delayed input audio by a fixed attenuation coefficient.
The inventors have found that since a beat does not have an accurate time length in a song, the echo is not at the beat in most cases if a fixed delay time and attenuation coefficient calculation is used. Further, the effect of echo processing is still affected by the manner of experience acquisition.
Aiming at the problem of poor echo processing effect in the related art, no effective solution is provided at present.
Disclosure of Invention
The present application mainly aims to provide a method and an apparatus for dynamic echo processing of audio to solve the problem of poor echo processing effect.
To achieve the above object, according to one aspect of the present application, there is provided a dynamic echo processing method for audio.
The dynamic echo processing method for audio according to the present application includes: acquiring the beat of a singing song; and adjusting the echo delay amount of the singing song to be a multiple of the duration time of one beat according to the beat of the singing song.
Further, adjusting the echo delay amount of the singing song to be a multiple of the duration of one beat further comprises: an echo attenuation processing step of limiting the echo delay amount within a preset time period, the echo attenuation processing step including:
comparing the volume of the first echo of the singing song with the volume of the accompaniment of the singing song; if the accompaniment volume is lower than the first echo volume or completely covers the first echo volume, dynamically adjusting partial frequency band of the first echo volume.
Further, comparing the volume of the echo of the singing song with the volume of the accompaniment of the singing song further comprises: and carrying out equalization processing on at least more than 2 echoes of the singing song.
Further, adjusting the echo delay amount of the singing song to be a multiple of the duration of one beat according to the beat of the singing song comprises: and adjusting the echo delay amount of the singing song to be an integer multiple of the duration time of one beat according to the beat of the singing song so that the echo of the singing song falls on the beat of the singing song.
Further, adjusting the echo delay amount of the singing song to be a multiple of the duration of one beat according to the beat of the singing song comprises: according to the beat of the singing song, the echo delay amount of the singing song is adjusted to 1/2 beats, 1/4 beats, 1/8 beats or 1/16 beats of the duration of one beat, so that the echo of the singing song falls on the beat of the singing song.
In order to achieve the above object, according to another aspect of the present application, there is provided a dynamic echo processing device for audio.
The dynamic echo processing device for audio according to the present application includes: the acquisition module is used for acquiring the beat of the singing song; and the adjusting module is used for adjusting the echo delay amount of the singing song to be a multiple of the duration time of one beat according to the beat of the singing song.
Further, the adjustment module includes: an echo attenuation processing module, configured to perform echo attenuation processing for limiting the echo delay amount within a preset time period, where the echo attenuation processing module includes: the comparison unit is used for comparing the volume of the first echo of the singing song with the volume of the accompaniment of the singing song; and the first adjusting unit is used for dynamically adjusting partial frequency bands of the first echo volume when the accompaniment volume is lower than the first echo volume or completely covers the first echo volume.
Further, the echo attenuation processing module further includes: and the equalizing processing unit is used for equalizing the echo of the singing song.
Further, the adjustment module includes: and the second adjusting unit is used for adjusting the echo delay amount of the singing song to be an integer multiple of the duration time of one beat according to the beat of the singing song so as to enable the echo of the singing song to fall on the beat of the singing song.
Further, the adjustment module includes: and a third adjusting unit, configured to adjust the echo delay amount of the sung song to 1/2 beats, 1/4 beats, 1/8 beats or 1/16 beats of the duration of one beat according to the beat of the sung song, so that the echo of the sung song falls on the beat of the sung song.
In the embodiment of the application, the echo delay amount of the singing song is adjusted to be multiple of duration time of one beat by adopting a mode of acquiring the beat of the singing song according to the beat of the singing song, so that the aim of dynamically processing the echo according to the beat of the song is fulfilled, the echoes are always in good time, the technical effect of the fusion degree of the song is improved, and the technical problem of poor echo processing effect is solved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, serve to provide a further understanding of the application and to enable other features, objects, and advantages of the application to be more apparent. The drawings and their description illustrate the embodiments of the invention and do not limit it. In the drawings:
FIG. 1 is a flow chart of a dynamic echo processing method for audio according to a first embodiment of the present application;
FIG. 2 is a flow chart of a dynamic echo processing method for audio according to a second embodiment of the present application;
FIG. 3 is a flow chart of a dynamic echo processing method for audio according to a third embodiment of the present application;
FIG. 4 is a flow chart of a dynamic echo processing method for audio according to a fourth embodiment of the present application;
fig. 5 is a schematic structural diagram of a dynamic echo processing device for audio according to a first embodiment of the present application;
fig. 6 is a schematic structural diagram of a dynamic echo processing device for audio according to a second embodiment of the present application;
fig. 7 is a schematic structural diagram of a dynamic echo processing device for audio according to a third embodiment of the present application;
fig. 8 is a schematic structural diagram of a dynamic echo processing device for audio according to a fourth embodiment of the present application.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
The dynamic echo processing method for audio in the application comprises the following steps: acquiring the beat of a singing song; and adjusting the echo delay amount of the singing song to be a multiple of the duration time of one beat according to the beat of the singing song. By the method and the device, echoes are always in time, and the fusion degree of songs is improved. Without the need for the mixer to make adjustments empirically. While the amount of delay of the echo is adjustable rather than fixed.
As shown in fig. 1, the method includes steps S102 to S104 as follows:
step S102, acquiring the beat of a singing song;
the tempo of each sung song is fixed, that is, when the tempo of the sung song a is a, no change occurs after the determination.
It should be noted that the manner of obtaining the beat of the sung song may include various manners, and may be obtained from a client or a background server. The tempo is fixed for each song, so those skilled in the art can select different acquisition modes according to different usage scenarios, and generally need to acquire in advance to be used as a parameter.
And step S104, adjusting the echo delay of the singing song to be a multiple of the duration time of one beat according to the beat of the singing song.
And adjusting the echo delay amount in the singing song to be a multiple of the duration time in one beat according to the beat of the singing song calculated on the server or the client. If the calculation is carried out in the server, the result is sent to the terminal provided with the client, and if the calculation is carried out on the client, the result can be directly obtained.
Preferably, the echo delay amount of the singing song may be adjusted to 1/2 beats, 1/4 beats, 1/8 beats or 1/16 beats of the duration of one beat according to the beat of the singing song so that the echo of the singing song falls on the beat of the singing song.
Since the tempo of the singing song is calculated and the echo delay amount is adjusted to a multiple of the duration within one tempo, the echo delay amount is set to an integral multiple or 1/2, 1/4, 1/8 times the duration of one beat in the song. The echo is fused with the beat of the song, so that the fusion degree of the singing song is not disturbed due to the echo effect.
It should be noted that, as to how to select the 1/2, 1/4, 1/8 or 1/16 beats of the duration of one beat, the relevant time value (such as the duration of each word in the singing song and the duration of each word in the lyrics of the singing song) can be calculated according to other parameters and determined, and is not limited in the present application as long as the limitation requirement on the time range of adjusting the echo delay amount to be multiple times of the duration of one beat can be met.
From the above description, it can be seen that the following technical effects are achieved by the present application:
in the embodiment of the application, the echo delay amount of the singing song is adjusted to be multiple of duration time of one beat by adopting a mode of acquiring the beat of the singing song according to the beat of the singing song, so that the aim of dynamically processing the echo according to the beat of the song is fulfilled, the echoes are always in good time, the technical effect of the fusion degree of the song is improved, and the technical problem of poor echo processing effect is solved.
According to the embodiment of the present application, as a preferable example in the embodiment, as shown in fig. 2, after adjusting the echo delay amount of the singing song to be a multiple of the duration of one beat, the method further includes: an echo attenuation processing step of limiting the echo delay amount within a preset time period, the echo attenuation processing step including:
step S202, comparing the volume of the first echo of the singing song with the volume of the accompaniment of the singing song;
since the accompaniment of the song is related to the attenuation degree of the echo, whether the volume of the echo becomes smaller is determined by the accompaniment of the song. The echo volume is partially covered by the accompaniment volume, and an auditory effect of 'invisible echo but inaudible' is formed.
It should be noted that the degree of attenuation of echo and the degree of reception of delay amounts are different for both ears of a person. It is only necessary to consider the magnitude between the volume of the first occurring echo and the volume of the accompaniment of the singing song in the embodiment of the present application. Since the number of echoes is at least 1, if there are a plurality of echoes remaining, the adjustment processing can be performed in accordance with the first echo volume adjustment ratio.
Step S204, if the volume of the accompaniment is lower than the volume of the first echo or completely covers the volume of the first echo, the partial frequency band of the volume of the first echo is dynamically adjusted.
According to the above processing result, it is necessary to process a portion of the frequency band of the accompaniment sound volume higher than the current first echo sound volume, for example, to cover a portion of the frequency band of the echo sound volume higher than the accompaniment sound volume, and for example, to expose a portion of the frequency band of the echo sound volume lower than the accompaniment sound volume. For example, when the echo volume is covered by the accompaniment volume in a certain frequency band, which echo volume is higher than the accompaniment may be selected according to the energy value of the sound volume.
Specifically, by comparing the volume of the echo and the accompaniment. The auditory effects that can be achieved are: the echo is allowed to be heard by the user, but the user hears less clearly.
It should be noted that, what frequency band of the accompaniment volume is higher than the first echo volume needs to be dynamically adjusted according to the real-scene situation, which is not limited in the embodiment of the present application as long as the auditory effect of "being able to hear the echo but not being able to hear it" is satisfied.
According to the embodiment of the present application, as a preferable preference in the embodiment, as shown in fig. 3, before comparing the volume of the echo of the singing song with the volume of the accompaniment of the singing song, the method further includes: step S302, at least 2 echoes of the singing song are subjected to equalization processing. In some cases, if the loudness of a certain frequency band of the echo volume is too high, equalization processing is required.
According to the embodiment of the present application, as a preferable option in the embodiment, as shown in fig. 4, adjusting the echo delay amount of the singing song to be a multiple of the duration of one beat according to the beat of the singing song includes:
step S402, according to the beat of the singing song, adjusting the echo delay amount of the singing song to be an integer multiple of the duration time of one beat, so that the echo of the singing song falls on the beat of the singing song.
Specifically, when the echo delay amount per word is determined to be more than the number of times of the tempo used, based on the time per word of the singing voice or the time per word of the lyrics. If the word time is long, 1 beat is used, and if the word time is short, 1/4 beats or even 1/8 beats are used. And when the time of the character is not used, the echo delay amount of the singing song is adjusted to be an integral multiple of the duration time of one beat, namely, a certain multiple of the whole beat is fixedly used as the delay time of the echo, so that the echo of the singing song falls on the beat of the singing song.
It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer-executable instructions and that, although a logical order is illustrated in the flowcharts, in some cases, the steps illustrated or described may be performed in an order different than presented herein.
According to an embodiment of the present application, there is also provided an apparatus for implementing the above dynamic echo processing method for audio, as shown in fig. 5, the apparatus includes: the obtaining module 10 is configured to obtain a beat of a singing song; and an adjusting module 20, configured to adjust the echo delay amount of the singing song to a multiple of the duration of one beat according to the beat of the singing song.
In the obtaining module 10 of the embodiment of the present application, the beat of each sung song is fixed, that is, when the beat of the sung song a is a, the change does not occur after the determination.
It should be noted that the manner of obtaining the beat of the sung song may include various manners, and may be obtained from a client or a background server. The tempo is fixed for each song, so those skilled in the art can select different acquisition modes according to different usage scenarios, and generally need to acquire in advance to be used as a parameter.
The tempo of each sung song is fixed, that is, when the tempo of the sung song a is a, no change occurs after the determination.
It should be noted that the manner of obtaining the beat of the sung song may include various manners, and may be obtained from a client or a background server. The tempo is fixed for each song, so those skilled in the art can select different acquisition modes according to different usage scenarios, and generally need to acquire in advance to be used as a parameter.
In the adjusting module 20 of the embodiment of the present application, the echo delay amount in the singing song is adjusted to be a multiple of the duration time within one beat according to the beat of the singing song calculated on the server or the client. If the calculation is carried out in the server, the result is sent to the terminal provided with the client, and if the calculation is carried out on the client, the result can be directly obtained.
Preferably, the echo delay amount of the singing song may be adjusted to 1/2 beats, 1/4 beats, 1/8 beats or 1/16 beats of the duration of one beat according to the beat of the singing song so that the echo of the singing song falls on the beat of the singing song.
Since the tempo of the singing song is calculated and the echo delay amount is adjusted to a multiple of the duration within one tempo, the echo delay amount is set to an integral multiple or 1/2, 1/4, 1/8 times the duration of one beat in the song. The echo is fused with the beat of the song, so that the fusion degree of the singing song is not disturbed due to the echo effect.
It should be noted that, as to how to select the 1/2, 1/4, 1/8 or 1/16 beats of the duration of one beat, the relevant time value (such as the duration of each word in the singing song and the duration of each word in the lyrics of the singing song) can be calculated according to other parameters and determined, and is not limited in the present application as long as the limitation requirement on the time range of adjusting the echo delay amount to be multiple times of the duration of one beat can be met.
According to the embodiment of the present application, as shown in fig. 6, the adjusting module preferably includes: an echo attenuation processing module 201, configured to perform echo attenuation processing for limiting the echo delay amount within a preset time period, where the echo attenuation processing module 201 includes: a comparing unit 2010, configured to compare a size between a first echo volume of the singing song and an accompaniment volume of the singing song; the first adjusting unit 2011 is configured to dynamically adjust a partial frequency band of the first echo volume when the accompaniment volume is lower than the first echo volume or completely covers the first echo volume.
In the comparing unit 2010 of the embodiment of the present application, since the accompaniment of the song is related to the attenuation degree of the echo, whether the echo volume is reduced is determined by the accompaniment of the song. The echo volume is partially covered by the accompaniment volume, and an auditory effect of 'invisible echo but inaudible' is formed.
It should be noted that the degree of attenuation of echo and the degree of reception of delay amounts are different for both ears of a person. It is only necessary to consider the magnitude between the volume of the first occurring echo and the volume of the accompaniment of the singing song in the embodiment of the present application. Since the number of echoes is at least 1, if there are a plurality of echoes remaining, the adjustment processing can be performed in accordance with the first echo volume adjustment ratio.
According to the above processing result, the first adjustment unit 2011 in the embodiment of the present application needs to be right when the echo volume is higher than the current, the partial frequency band of the first echo volume is processed, for example, the frequency band covering the partial echo volume is higher than the echo volume, and for example, the frequency band exposing the partial echo volume to be lower than the echo volume is shown. For example, when the echo volume is covered by the accompaniment volume in a certain frequency band, which echo volume is higher than the accompaniment may be selected according to the energy value of the sound volume.
Specifically, by comparing the volume of the echo and the accompaniment. The auditory effects that can be achieved are: the echo is allowed to be heard by the user, but the user hears less clearly.
It should be noted that, what frequency band of the accompaniment volume is higher than the first echo volume needs to be dynamically adjusted according to the real-scene situation, which is not limited in the embodiment of the present application as long as the auditory effect of "being able to hear the echo but not being able to hear it" is satisfied.
According to the embodiment of the present application, as shown in fig. 7, preferably in the embodiment, the echo attenuation processing module further includes: and an equalizing unit 2012, configured to perform equalizing processing on the echo of the sung song.
In some cases, in the equalization processing unit 2012 of the embodiment of the present application, if the loudness of a certain frequency band of the echo volume is too high, equalization processing needs to be performed.
According to the embodiment of the present application, as shown in fig. 8, the adjusting module preferably includes: a second adjusting unit 2014, configured to adjust the echo delay amount of the singing song to be an integer multiple of a duration of one beat according to the beat of the singing song, so that the echo of the singing song falls on the beat of the singing song. The adjustment module includes: a third adjusting unit 2015, configured to adjust the echo delay amount of the singing song to 1/2 beats, 1/4 beats, 1/8 beats or 1/16 beats of the duration of one beat according to the beat of the singing song, so that the echo of the singing song falls on the beat of the singing song.
Specifically, in the second adjusting unit 2014 according to the embodiment of the present application, it is determined how many times the echo delay amount of each word is specifically the usage tempo according to the time of singing each word of the singing vocal or the time of each word of the lyrics. If the word time is long, 1 beat is used, and if the word time is short, 1/4 beats or even 1/8 beats are used. And when the time of the character is not used, the echo delay amount of the singing song is adjusted to be an integral multiple of the duration time of one beat, namely, a certain multiple of the whole beat is fixedly used as the delay time of the echo, so that the echo of the singing song falls on the beat of the singing song.
In the third adjusting unit 2015 of the embodiment of the present application, preferably, according to the tempo of the sung song, the echo delay amount of the sung song may be adjusted to 1/2 beats, 1/4 beats, 1/8 beats or 1/16 beats of the duration of one beat, so that the echo of the sung song falls on the tempo of the sung song.
It will be apparent to those skilled in the art that the modules or steps of the present application described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and they may alternatively be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, or fabricated separately as individual integrated circuit modules, or fabricated as a single integrated circuit module from multiple modules or steps. Thus, the present application is not limited to any specific combination of hardware and software.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (8)
1. A method for dynamic echo processing of audio, comprising:
acquiring the beat of a singing song; and
according to the beat of the singing song, adjusting the echo delay of the singing song to be a multiple of the duration time of one beat;
after adjusting the echo delay amount of the singing song to be a multiple of the duration of one beat, the method further comprises the following steps: an echo attenuation processing step of limiting the echo delay amount within a preset time period, the echo attenuation processing step including:
comparing the volume of the first echo of the singing song with the volume of the accompaniment of the singing song;
if the accompaniment volume is lower than the first echo volume or completely covers the first echo volume, dynamically adjusting partial frequency band of the first echo volume.
2. The dynamic echo processing method of claim 1, wherein comparing the volume of the echo of the singing song with the volume of the accompaniment of the singing song further comprises: and carrying out equalization processing on at least more than 2 echoes of the singing song.
3. The dynamic echo processing method of claim 1, wherein adjusting the echo delay amount of the singing song to be a multiple of the duration of one beat according to the tempo of the singing song comprises:
and adjusting the echo delay amount of the singing song to be an integer multiple of the duration time of one beat according to the beat of the singing song so that the echo of the singing song falls on the beat of the singing song.
4. The dynamic echo processing method of claim 1, wherein adjusting the echo delay amount of the singing song to be a multiple of the duration of one beat according to the tempo of the singing song comprises:
according to the beat of the singing song, the echo delay amount of the singing song is adjusted to 1/2 beats, 1/4 beats, 1/8 beats or 1/16 beats of the duration of one beat, so that the echo of the singing song falls on the beat of the singing song.
5. A dynamic echo processing device for audio, comprising:
the acquisition module is used for acquiring the beat of the singing song; and
the adjusting module is used for adjusting the echo delay amount of the singing song to be a multiple of the duration time of one beat according to the beat of the singing song;
the adjustment module includes: an echo attenuation processing module, configured to perform echo attenuation processing for limiting the echo delay amount within a preset time period, where the echo attenuation processing module includes:
the comparison unit is used for comparing the volume of the first echo of the singing song with the volume of the accompaniment of the singing song;
and the first adjusting unit is used for dynamically adjusting partial frequency bands of the first echo volume when the accompaniment volume is lower than the first echo volume or completely covers the first echo volume.
6. The dynamic echo processing device of claim 5, wherein the echo attenuation processing module further comprises: and the equalizing processing unit is used for equalizing the echo of the singing song.
7. The dynamic echo processing device of claim 5, wherein the adjustment module comprises: and the second adjusting unit is used for adjusting the echo delay amount of the singing song to be an integer multiple of the duration time of one beat according to the beat of the singing song so as to enable the echo of the singing song to fall on the beat of the singing song.
8. The dynamic echo processing device of claim 5, wherein the adjustment module comprises: and a third adjusting unit, configured to adjust the echo delay amount of the sung song to 1/2 beats, 1/4 beats, 1/8 beats or 1/16 beats of the duration of one beat according to the beat of the sung song, so that the echo of the sung song falls on the beat of the sung song.
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