CN110753297B - Mixing processing method and processing device for audio signals - Google Patents

Mixing processing method and processing device for audio signals Download PDF

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CN110753297B
CN110753297B CN201910925123.9A CN201910925123A CN110753297B CN 110753297 B CN110753297 B CN 110753297B CN 201910925123 A CN201910925123 A CN 201910925123A CN 110753297 B CN110753297 B CN 110753297B
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reverberation
audio
audio output
signal
output channel
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CN110753297A (en
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李志雄
黄石锋
黄庆杰
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Guangzhou Leafun Culture Science and Technology Co Ltd
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Guangzhou Leafun Culture Science and Technology Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S7/00—Indicating arrangements; Control arrangements, e.g. balance control
    • H04S7/30—Control circuits for electronic adaptation of the sound field
    • H04S7/305—Electronic adaptation of stereophonic audio signals to reverberation of the listening space
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/008—Multichannel audio signal coding or decoding using interchannel correlation to reduce redundancy, e.g. joint-stereo, intensity-coding or matrixing

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Abstract

The embodiment of the invention relates to the technical field of audio processing, and discloses a mixing processing method and a processing device of audio signals, wherein the method is applied to the processing device, the processing device is connected with a plurality of pickup equipment and a plurality of public address equipment, each pickup equipment corresponds to an audio input channel, and each public address equipment corresponds to an audio output channel, and the method comprises the following steps: acquiring audio signals of a plurality of audio input channels; performing reverberation processing on the audio signals to obtain reverberation signals corresponding to each audio input channel; distributing the reverberation signal corresponding to each audio input channel to a plurality of audio output channels to obtain a reverberation sub-signal corresponding to each audio output channel; outputting the reverberant sub-signal through the audio output channel. By implementing the embodiment of the invention, the sound field uniformity of the hall can be improved, so that the reverberation adjusting effect is improved.

Description

Mixing processing method and processing device for audio signals
Technical Field
The present invention relates to the field of audio processing technologies, and in particular, to a method and a device for mixing and processing audio signals.
Background
At present, many professional theaters such as theaters, operas and multi-functional halls are built at home and abroad. These professional theaters may make reverberation adjustments for different shows (e.g., opera, singing, etc.) to achieve different reverberation times for the audio signal. Existing reverberation adjustment approaches typically require several sound pickup devices and loudspeakers to be placed at different locations in the hall so that the sound pickup devices perform reverberation adjustment by continuing to pick up the audio signal reproduced by the loudspeakers. However, in practice, it is found that after the audio signal picked up by the same sound pickup device is processed, the audio signal is usually output through one sound amplification device, which results in poor sound field uniformity of the hall, thereby reducing the effect of reverberation adjustment.
Disclosure of Invention
The embodiment of the invention discloses a mixing processing method and a processing device of audio signals, which can improve the sound field uniformity of a hall, thereby improving the reverberation adjusting effect.
The first aspect of the embodiments of the present invention discloses a method for mixing and processing an audio signal, where the method is applied to a processing apparatus, and the processing apparatus is connected to a plurality of sound pickup devices and a plurality of sound amplification devices, where each sound pickup device corresponds to an audio input channel and each sound amplification device corresponds to an audio output channel, and the method includes:
acquiring audio signals of a plurality of audio input channels;
performing reverberation processing on the audio signals to obtain reverberation signals corresponding to each audio input channel;
distributing the reverberation signal corresponding to each audio input channel to a plurality of audio output channels to obtain a reverberation sub-signal corresponding to each audio output channel;
outputting the reverberant sub-signal through the audio output channel.
As an optional implementation manner, in the first aspect of the embodiment of the present invention, the performing reverberation processing on the audio signal to obtain a reverberation signal corresponding to each of the audio input channels includes:
acquiring performance information of a designated hall; the performance information at least comprises performance programs and the space size of the appointed hall;
calling reverberation simulation parameters matched with the performance information;
and according to the reverberation simulation parameters, performing reverberation processing on the audio signals to obtain reverberation signals corresponding to each audio input channel.
As an optional implementation manner, in the first aspect of the embodiment of the present invention, the allocating the reverberation signal corresponding to each of the audio input channels to a plurality of the audio output channels to obtain the reverberation sub-signal corresponding to each of the audio output channels includes:
and distributing the reverberation signal corresponding to each audio input channel to a plurality of audio output channels according to a preset gain value of each audio output channel to obtain the reverberation subsignals corresponding to each audio output channel.
As an optional implementation manner, in the first aspect of this embodiment of the present invention, the method further includes:
presetting a gain value of each audio output channel at each moment to obtain a preset gain value of each audio output channel; wherein the gain value of each audio output channel is periodically changed; in each period, the gain value of each audio output channel at each moment is in linear correlation with time, and the sum of the gain values of all the audio output channels is 1.
As an optional implementation manner, in the first aspect of this embodiment of the present invention, the method further includes:
in the process of outputting the reverberation sub-signal through the audio output channel, if a superposition instruction input by a user is detected, acquiring audio content corresponding to the reverberation sub-signal output by the audio output channel at the current moment;
and repeatedly outputting the audio content according to the response time of the sound superposition instruction input by the user.
A second aspect of the embodiments of the present invention discloses a processing apparatus, where the processing apparatus is connected to a plurality of sound pickup devices and a plurality of sound amplification devices, where each sound pickup device corresponds to an audio input channel, and each sound amplification device corresponds to an audio output channel, the processing apparatus including:
a first acquisition unit configured to acquire audio signals of a plurality of the audio input channels;
the reverberation processing unit is used for carrying out reverberation processing on the audio signals to obtain reverberation signals corresponding to each audio input channel;
the distribution unit is used for distributing the reverberation signal corresponding to each audio input channel to a plurality of audio output channels so as to obtain the reverberation subsignals corresponding to each audio output channel;
an output unit for outputting the reverberation sub-signal through the audio output channel.
As an alternative implementation, in a second aspect of the embodiments of the present invention, the reverberation processing unit includes:
the acquisition subunit is used for acquiring performance information of the designated hall; the performance information at least comprises performance programs and the space size of the appointed hall;
the calling subunit is used for calling reverberation simulation parameters matched with the performance information;
and the processing subunit is configured to perform reverberation processing on the audio signal according to the reverberation simulation parameter to obtain a reverberation signal corresponding to each audio input channel.
As an alternative implementation, in the second aspect of the embodiment of the present invention,
the allocation unit is specifically configured to allocate the reverberation signal corresponding to each of the audio input channels to the plurality of audio output channels according to a preset gain value of each of the audio output channels, so as to obtain the reverberation sub-signal corresponding to each of the audio output channels.
As an optional implementation manner, in the second aspect of the embodiment of the present invention, the processing apparatus further includes:
the setting unit is used for presetting the gain value of each audio output channel at each moment so as to obtain the preset gain value of each audio output channel; wherein the gain value of each audio output channel is periodically changed; in each period, the gain value of each audio output channel at each moment is in linear correlation with time, and the sum of the gain values of all the audio output channels is 1.
As an optional implementation manner, in the second aspect of the embodiment of the present invention, the processing apparatus further includes:
the second obtaining unit is used for obtaining the audio content corresponding to the reverberation sub-signal output by the audio output channel at the current moment if a reverberation instruction input by a user is detected in the process of outputting the reverberation sub-signal through the audio output channel;
the output unit is further configured to repeatedly output the audio content according to a response duration of the superposition instruction input by the user.
A third aspect of the embodiments of the present invention discloses a processing apparatus, including:
a memory storing executable program code;
a processor coupled with the memory;
the processor calls the executable program code stored in the memory to execute the audio signal mixing processing method disclosed by the first aspect of the embodiment of the invention.
A fourth aspect of the embodiments of the present invention discloses a computer-readable storage medium storing a computer program, wherein the computer program causes a computer to execute a method for mixing and processing audio signals disclosed in the first aspect of the embodiments of the present invention.
A fifth aspect of embodiments of the present invention discloses a computer program product, which, when run on a computer, causes the computer to perform some or all of the steps of any one of the methods of the first aspect.
A sixth aspect of the present embodiment discloses an application publishing platform, where the application publishing platform is configured to publish a computer program product, where the computer program product is configured to, when running on a computer, cause the computer to perform part or all of the steps of any one of the methods in the first aspect.
Compared with the prior art, the embodiment of the invention has the following beneficial effects:
in the embodiment of the invention, the mixing processing method of the audio signals is applied to a processing device, and the processing device is connected with a plurality of sound pickup equipment and a plurality of sound amplification equipment, wherein each sound pickup equipment corresponds to one audio input channel, and each sound amplification equipment corresponds to one audio output channel. The processing device acquires audio signals of a plurality of audio input channels, performs reverberation processing on the audio signals to obtain a reverberation signal corresponding to each audio input channel, distributes the reverberation signal corresponding to each audio input channel to a plurality of audio output channels to obtain a reverberation sub-signal corresponding to each audio output channel, and outputs the reverberation sub-signal through the audio output channels.
Therefore, by implementing the embodiment of the invention, the reverberation signal obtained after reverberation processing is distributed to the plurality of audio output channels, so that each audio output channel obtains the reverberation sub-signal from different audio input channels, and the reverberation sub-signal is output through the corresponding audio output channel, so that the sound field uniformity of the hall can be improved, and the reverberation adjusting effect can be improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a flow chart illustrating a mixing processing method for audio signals according to an embodiment of the present invention;
FIG. 2 is a flow chart of another audio signal mixing processing method according to the embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a processing apparatus according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of another processing apparatus disclosed in the embodiments of the present invention;
FIG. 5 is a schematic structural diagram of another processing apparatus disclosed in the embodiments of the present invention;
FIG. 6 is a block diagram of a mixing method for audio signals according to an embodiment of the present invention;
fig. 7 is a schematic diagram of the distribution of a reverberation signal according to the embodiment of the present invention;
fig. 8 is a schematic diagram of the distribution of another reverberation signal disclosed by the embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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 invention.
It is to be noted that the terms "first" and "second" and the like in the description and the claims of the present invention are used for distinguishing different objects, and are not used for describing a specific order. The terms "comprises," "comprising," and any other variation 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.
In the present invention, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "center", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are used primarily to better describe the invention and its embodiments and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.
Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meanings of these terms in the present invention can be understood by those skilled in the art as appropriate.
Furthermore, the terms "mounted," "disposed," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meanings of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.
The embodiment of the invention discloses a mixing processing method and a processing device of audio signals, which can improve the sound field uniformity of a hall, thereby improving the reverberation adjusting effect. The following detailed description is made with reference to the accompanying drawings.
In order to better understand the mixing processing method and processing apparatus for audio signals disclosed in the embodiments of the present invention, a description will be given below of a framework to which the embodiments of the present invention are applicable. Referring to fig. 6, fig. 6 is a schematic diagram of a mixing processing method for audio signals according to an embodiment of the present invention. As shown in fig. 6, the schematic diagram of the mixing processing method for audio signals may include a plurality of sound pickup devices (e.g., microphones), a processing apparatus, and a plurality of sound amplifying devices (e.g., speakers). Wherein, the pickup equipment can pick up audio signal and give processing apparatus with audio signal transmission through its audio input passageway that corresponds and handle, handles the back when processing apparatus handles audio signal, can export the audio signal after handling through the audio output passageway that public address equipment corresponds. In addition, each sound pickup apparatus corresponds to one audio input channel, and each sound amplification apparatus corresponds to one audio output channel. Based on the schematic structural diagram shown in fig. 6, the following describes a mixing processing method and a processing apparatus for audio signals according to an embodiment of the present invention.
Example one
Referring to fig. 1, fig. 1 is a flow chart illustrating a mixing processing method of audio signals according to an embodiment of the present invention. The method is applied to a processing device which is connected with a plurality of sound pickup devices and a plurality of sound amplifying devices, wherein each sound pickup device corresponds to one audio input channel, and each sound amplifying device corresponds to one audio output channel, and as shown in fig. 1, the method can comprise the following steps.
101. The processing device acquires audio signals of a plurality of audio input channels.
In the embodiment of the invention, the processing device is connected with a plurality of sound pickup equipment, so that after the sound pickup equipment picks up the audio signals, the audio signals can be transmitted to the processing device through the corresponding audio input channels. The audio signal may include, among other things, an initial audio signal (i.e., an original sound source) and a reverberated audio signal (i.e., a secondary sound source) that is played back through the loudspeaker device.
In the embodiment of the invention, if the user wants to save important audio signals for subsequent processing, such as important leadership speaking, large knowledge training and the like.
Therefore, as an alternative embodiment, after the processing device acquires the audio signals of the plurality of audio input channels in step 101, the following steps may be further performed:
acquiring a keyword list prestored by a user;
searching whether target content matched with a certain keyword in the keyword list exists in audio content corresponding to the audio signals of the plurality of audio input channels;
and if so, storing the audio signal corresponding to the target content.
In the embodiment of the present invention, the pre-stored keyword list may be a list formed by key keywords input by the user in advance according to the program information performed in the hall at this time, and the embodiment of the present invention is not limited.
For example, assuming that there is a certain keyword "five major prominent talents" in the pre-stored keyword list, and there are target contents of "A, B, C, D and E" in the audio contents corresponding to the audio signals of the multiple audio input channels, at this time, the processing device may store the sentence "A, B, C, D and E" in the 2019 cantonese five prominent talents as important contents.
By implementing the optional implementation mode, the audio contents corresponding to the audio signals of the multiple audio input channels are retrieved according to the keyword list pre-stored by the user, so that the contents considered by the user to be more important can be stored, and the use experience is improved.
102. The processing device performs reverberation processing on the audio signals to obtain reverberation signals corresponding to each audio input channel.
Generally, after sound is output through the audio output channel corresponding to the sound amplifying device, the sound is reflected by a wall, a ceiling and the like, picked up again by the sound pickup device and output through the audio output channel corresponding to the sound amplifying device again, that is, the secondary sound source described above makes the sound form certain layering and spatial sense. In the embodiment of the present invention, the processing device may perform reverberation processing on the audio signals obtained from the plurality of audio input channels to obtain a reverberation signal corresponding to each audio input channel. The reverberation processing may include, but is not limited to, sampling reverberation, algorithm reverberation, and analog synthesis reverberation, and the embodiment of the present invention is not limited thereto.
103. The processing device distributes the reverberation signal corresponding to each audio input channel to a plurality of audio output channels to obtain a reverberation sub-signal corresponding to each audio output channel.
In this embodiment of the present invention, the processing device may allocate the reverberation signal corresponding to each audio input channel to multiple audio output channels, where the allocation manner may be average allocation or random allocation, and only needs to make the sum of the gain values of the allocated reverberation sub-signals 1, and the embodiment of the present invention is not limited. For example, assuming that the processing device connects N audio output channels (N is a natural number), for a reverberation signal P corresponding to one audio input channel, the processing device can allocate the reverberation signal P to any one audio output channel as
Figure BDA0002218745480000081
Referring to fig. 7, fig. 7 is a schematic diagram illustrating the distribution of reverberation signals according to an embodiment of the present invention. As shown in FIG. 7, assume that the processing device connects three audio input channels and threeAnd after the processing device receives the first reverberation signal corresponding to the audio input channel A, the processing device divides the first reverberation signal into a first reverberation sub-signal, a second reverberation sub-signal and a third reverberation sub-signal, wherein the sum of the gain values of the first reverberation sub-signal, the second reverberation sub-signal and the third reverberation sub-signal is 1. The processing means then transmits the first reverberant sub-signal to audio output channel a via sub-link 71, the second reverberant sub-signal to audio output channel B via sub-link 72 and the third reverberant sub-signal to audio output channel C via sub-link 73.
It will be appreciated that, similarly, after receiving the second reverberation signal corresponding to the audio input channel B, the processing device divides the second reverberation signal into a fourth reverberation sub-signal, a fifth reverberation sub-signal and a sixth reverberation sub-signal, and then transmits the fourth reverberation sub-signal to the audio output channel a through the sub-link 74, the fifth reverberation sub-signal to the audio output channel B through the sub-link 75 and the sixth reverberation sub-signal to the audio output channel C through the sub-link 76; after receiving the third reverberation signal corresponding to the audio input channel C, the processing device divides the third reverberation signal into a seventh reverberation sub-signal, an eighth reverberation sub-signal and a ninth reverberation sub-signal, and then transmits the seventh reverberation sub-signal to the audio output channel a through the sub-link 77, the eighth reverberation sub-signal to the audio output channel B through the sub-link 78 and the ninth reverberation sub-signal to the audio output channel C through the sub-link 79.
At this time, the reverberation sub-signals received by the audio output channel a are the first reverberation sub-signal, the fourth reverberation sub-signal and the seventh reverberation sub-signal, the reverberation sub-signals received by the audio output channel B are the first reverberation sub-signal, the fifth reverberation sub-signal and the eighth reverberation sub-signal, and the reverberation sub-signals received by the audio output channel C are the third reverberation sub-signal, the sixth reverberation sub-signal and the ninth reverberation sub-signal.
104. The processing means outputs the reverberant sub-signal via the audio output channel.
As an alternative implementation, in the process of outputting the reverberation sub-signal through the audio output channel by the processing device in step 104, the following steps may be further performed:
acquiring current performance mode information of a designated hall; the performance mode information at least comprises the number of lights required to be started for performance and the layout of the lights required to be started for performance;
and according to the performance mode information, starting the light required to be started for the performance.
By implementing the optional implementation mode, the audio playing is combined with the lighting, so that the program performance effect can be improved.
It can be seen that, by implementing the method described in fig. 1, the reverberation signal obtained after reverberation processing is distributed to a plurality of audio output channels, so that each audio output channel obtains reverberation sub-signals from different audio input channels, and then the reverberation sub-signals are output through the corresponding audio output channels, so that the sound field uniformity of the hall can be improved, and the reverberation adjustment effect can be improved.
Example two
Referring to fig. 2, fig. 2 is a flow chart illustrating another audio signal mixing processing method according to an embodiment of the present invention. The audio signal processing method is applied to a processing device which is connected with a plurality of sound pickup devices and a plurality of sound amplifying devices, wherein each sound pickup device corresponds to one audio input channel, and each sound amplifying device corresponds to one audio output channel, as shown in fig. 2, the method can comprise the following steps.
201. The processing device acquires audio signals of a plurality of audio input channels.
In the embodiment of the present invention, in order to avoid that the program performance cannot be smoothly performed due to the fact that the device is damaged and the staff is not aware of the device, as an optional implementation manner, before the processing device acquires the audio signals of the plurality of audio input channels in step 201, the processing device may further perform the following steps:
sending detection signals to a plurality of pickup devices and a plurality of public address devices which are connected with the processing device;
detecting whether a first signal fed back by pickup equipment and a second signal fed back by public address equipment are received within a preset time;
if the received first signal fed back by the pickup equipment is inconsistent with the total number of the pickup equipment, acquiring first equipment information of the pickup equipment which does not feed back the first signal, and sending the first equipment information to a worker to remind the worker to maintain the pickup equipment which does not feed back the first signal in time;
and if the received second signal fed back by the public address equipment is inconsistent with the total number of the public address equipment, acquiring second equipment information of the public address equipment which does not feed back the second signal, and sending the second equipment information to a worker to remind the worker to maintain the public address equipment which does not feed back the second signal in time.
By implementing the optional implementation mode, whether the sound pickup equipment and the sound amplifying equipment are damaged or not can be detected in advance, and the smooth progress of the program performance is ensured.
202. The processing device acquires show information specifying a hall.
In the embodiment of the present invention, the show information at least includes show programs and a space size of a designated hall.
203. The processing device calls reverberation simulation parameters matched with the performance information.
It can be understood that, the program shows performed in the hall are different in space, the corresponding optimal reverberation time is different, and the required reverberation simulation parameters are different, for example, the optimal reverberation time required for opera and singing is different, and the optimal reverberation time required for large hall and small hall is different. Assuming that the designated hall is a large hall and the performed program show is an opera, the processing device calls reverberation simulation parameters matched with the large hall and the opera according to the acquired show information of the designated hall.
204. And the processing device performs reverberation processing on the audio signals according to the reverberation simulation parameters to obtain reverberation signals corresponding to each audio input channel.
In the embodiment of the present invention, steps 202 to 204 are implemented to provide a method for performing reverberation processing on an audio signal, and the method is configured to call a matched reverberation simulation parameter according to performance information of a specified hall, and perform reverberation processing on the audio signal according to the reverberation simulation parameter, so that an effect of the reverberation processing can be matched with the specified hall.
205. The processing device distributes the reverberation signal corresponding to each audio input channel to the plurality of audio output channels according to the preset gain value of each audio output channel to obtain the reverberation subsignals corresponding to each audio output channel.
As an alternative embodiment, the processing device may preset a gain value of each audio output channel at each time to obtain a preset gain value of each audio output channel; wherein, the gain value of each audio output channel is periodically changed; in each period, the gain value of each audio output channel at each moment is linearly related to time, and the sum of the gain values of all the audio output channels is 1.
It will be appreciated that since the gain value of each audio output channel varies periodically and the gain value of each audio output channel at each instant in time is linearly related to time in each period, the processing means may apportion the reverberation signal corresponding to each audio input channel to the plurality of audio output channels over the time period.
By implementing the optional embodiment, a method for presetting the gain value of each audio output channel is provided, that is, by linearly setting the gain value of each audio output channel at each moment, since the sum of the gain values of all the audio output channels is 1, the reverberation signal input by each audio input channel can be distributed to a plurality of audio output channels, and based on the time-varying characteristic and the periodic characteristic of the gain value, the gain value of the reverberation signal corresponding to each audio input channel can be distributed to the plurality of audio output channels according to a certain proportion along the time period, which is beneficial to improving the sound field uniformity.
Referring to fig. 8, fig. 8 is a schematic diagram of another allocation of reverberation signals according to the embodiment of the present invention. As shown in fig. 8, assuming that the variation frequency of the gain value is T (e.g. 1ms), if the current time T corresponds to the time T of the first gain variation, the gain values of the audio output channel A, B, C set by the processing device for the first reverberation signal corresponding to the audio input channel a are 1, 0, and 0, respectively, and at this time, the processing device transmits all the first reverberation signals of the audio output channel a to the audio output channel a; it is understood that, similarly, the gain values of the audio output channel A, B, C set by the processing device for the second reverberation signal corresponding to the audio input channel B are 0, 1 and 0, respectively, when the processing device transmits the second reverberation signal of the audio output channel B to the audio output channel B completely; the gain values of the audio output channel A, B, C set by the processing device for the third reverberation signal corresponding to the audio input channel C are 0, and 1, respectively, and at this time, the processing device transmits all the third reverberation signals of the audio output channel C to the audio output channel C.
If the current time T corresponds to the time 2T of the second gain change, the processing device sets the gain values of the audio output channel A, B, C for the first reverberation signal corresponding to the audio input channel a to be 0.9, 0.1, and 0, respectively, and at this time, the processing device distributes the first reverberation signal of the audio input channel a to the audio output channel A, B, C according to the preset gain value of each audio output channel. It is understood that, similarly, the gain values of the audio output channel A, B, C set by the processing device for the second reverberation signal corresponding to the audio input channel B are 0, 0.9, and 0.1, respectively, and at this time, the processing device distributes the second reverberation signal of the audio input channel B to the audio output channel A, B, C according to the preset gain value of each audio output channel; the processing device sets the gain values of the audio output channel A, B, C for the third reverberation signal corresponding to the audio input channel C to be 0.1, 0, and 0.9, and at this time, the processing device distributes the third reverberation signal of the audio input channel C to the audio output channel A, B, C according to the preset gain value of each audio output channel.
Assuming that 0-2T is the first period, in the next period (i.e. 2T-4T), the variation rule of the gain value of each audio output channel is consistent with the variation rule of the gain value of each audio output channel in the first period (i.e. 0-2T), and will not be described herein again.
For example, the processing device may further set a gain value of each audio output channel on average, for example, assuming that there are 3 audio output channels, the gain value of each audio output channel may be set to 1/3, and step 205 allocates the reverberation signal corresponding to each audio input channel to the 3 audio output channels according to the set gain value of 1/3, where the obtained gain value of the reverberation sub-signal corresponding to each audio output channel is 1/3.
In the embodiment of the present invention, step 205 is implemented, and the reverberation signal corresponding to each audio input channel is distributed to the plurality of audio output channels according to the preset gain value of each audio output channel, so that the sound field uniformity of the hall can be further improved.
206. The processing means outputs the reverberant sub-signal via the audio output channel.
As an alternative implementation, the processing device may further perform the following steps:
in the process of outputting the reverberation sub-signals through the audio output channel, if a superposition instruction input by a user is detected, acquiring audio content corresponding to the reverberation sub-signals output by the audio output channel at the current moment;
and repeatedly outputting the audio content corresponding to the reverberation sub-signal output by the audio output channel at the current moment according to the response time of the sound superposition instruction input by the user.
In the embodiment of the present invention, for example, when the reverberation signal output by the audio output channel corresponds to "what is high", when the superimposition command input by the user is detected, assuming that the audio content corresponding to the reverberation signal output by the audio output channel at the current time is "what", the response time of the superimposition command input by the user is 3 seconds, the processing device repeatedly outputs the audio content corresponding to the reverberation signal output by the audio output channel at the current time, that is, the audio content output by the processing device through the audio output channel at this time is "what is high.
By implementing the optional implementation mode, the audio content corresponding to the reverberation sub-signal output by the audio output channel at the current moment is repeatedly output according to the response time of the superposition instruction input by the user, so that the user experience can be improved, and the processing device is more personalized.
It can be seen that, by implementing the method described in fig. 2, the reverberation signal obtained after reverberation processing is distributed to a plurality of audio output channels, so that each audio output channel obtains reverberation sub-signals from different audio input channels, and then the reverberation sub-signals are output through the corresponding audio output channels, so that the sound field uniformity of the hall can be improved, and the reverberation adjustment effect can be improved. In addition, implementing the method described in fig. 2, a method for performing reverberation processing on an audio signal is provided, and the reverberation simulation parameters matched with the performance information of the designated hall are called according to the performance information of the designated hall, and the reverberation processing is performed on the audio signal according to the reverberation simulation parameters, so that the reverberation processing effect can be matched with the designated hall. In addition, implementing the method described in fig. 2, the reverberation signal corresponding to each audio input channel is distributed to a plurality of audio output channels according to the preset gain value of each audio output channel, so that the sound field uniformity of the hall can be further improved.
EXAMPLE III
Referring to fig. 3, fig. 3 is a schematic structural diagram of a processing apparatus according to an embodiment of the disclosure. The processing apparatus is connected to a plurality of sound pickup devices and a plurality of sound amplifying devices, wherein each sound pickup device corresponds to an audio input channel, and each sound amplifying device corresponds to an audio output channel, as shown in fig. 3, the processing apparatus may include:
a first obtaining unit 301, configured to obtain audio signals of a plurality of audio input channels.
In the embodiment of the present invention, the processing apparatus is connected to a plurality of sound collecting devices, so that after the sound collecting devices pick up audio signals, the audio signals can be transmitted to the first obtaining unit 301 through their corresponding audio input channels. The audio signal may include, among other things, an initial audio signal (i.e., an original sound source) and a reverberated audio signal (i.e., a secondary sound source) that is played back through the loudspeaker device.
In the embodiment of the invention, if the user wants to save important audio signals for subsequent processing, such as important leadership speaking, large knowledge training and the like.
Therefore, as an alternative embodiment, after the first obtaining unit 301 obtains the audio signals of the multiple audio input channels, the following steps may be further performed:
acquiring a keyword list prestored by a user;
searching whether target content matched with a certain keyword in the keyword list exists in audio content corresponding to the audio signals of the plurality of audio input channels;
and if so, storing the audio signal corresponding to the target content.
In the embodiment of the present invention, the pre-stored keyword list may be a list formed by key keywords input by the user in advance according to the program information performed in the hall at this time, and the embodiment of the present invention is not limited.
By implementing the optional implementation mode, the audio contents corresponding to the audio signals of the multiple audio input channels are retrieved according to the keyword list pre-stored by the user, so that the contents considered by the user to be more important can be stored, and the use experience is improved.
A reverberation processing unit 302, configured to perform reverberation processing on the audio signal to obtain a reverberation signal corresponding to each audio input channel.
A distributing unit 303, configured to distribute the reverberation signal corresponding to each audio input channel to multiple audio output channels to obtain a reverberation sub-signal corresponding to each audio output channel.
In this embodiment of the present invention, the allocating unit 303 may allocate the reverberation signal corresponding to each audio input channel to multiple audio output channels, where the allocation manner may be average allocation or random allocation, and only the sum of the gain values of the allocated reverberation sub-signals needs to be 1, which is not limited in this embodiment of the present invention.
An output unit 304 for outputting the reverberant sub-signal through the audio output channel.
As an alternative implementation, in the process that the output unit 304 outputs the reverberation sub-signal through the audio output channel, the following steps may be further performed:
acquiring current performance mode information of a designated hall; the performance mode information at least comprises the number of lights required to be started for performance and the layout of the lights required to be started for performance;
and according to the performance mode information, starting the light required to be started for the performance.
By implementing the optional implementation mode, the audio playing is combined with the lighting, so that the program performance effect can be improved.
It can be seen that, with the processing apparatus described in fig. 3, by distributing the reverberation signal obtained after the reverberation processing to the plurality of audio output channels, each audio output channel obtains the reverberation sub-signal from a different audio input channel, and then outputs the reverberation sub-signal through the corresponding audio output channel, the sound field uniformity of the hall can be improved, thereby improving the reverberation adjustment effect.
Example four
Referring to fig. 4, fig. 4 is a schematic structural diagram of another processing apparatus according to an embodiment of the disclosure. The processing device is connected with a plurality of sound pickup devices and a plurality of sound amplifying devices, wherein each sound pickup device corresponds to one audio input channel, and each sound amplifying device corresponds to one audio output channel. The processing arrangement shown in fig. 4 is further optimized from the processing arrangement shown in fig. 3. In comparison with the processing apparatus shown in fig. 3:
the reverberation processing unit 302 includes:
an acquisition subunit 3021 configured to acquire performance information of a designated hall;
a calling subunit 3022, configured to call the reverberation simulation parameter matched with the performance information;
and the processing subunit 3023 is configured to perform reverberation processing on the audio signal according to the reverberation simulation parameter to obtain a reverberation signal corresponding to each audio input channel.
In the embodiment of the present invention, the show information at least includes show programs and a space size of a designated hall.
The allocating unit 303 is specifically configured to allocate the reverberation signal corresponding to each audio input channel to multiple audio output channels according to a preset gain value of each audio output channel, so as to obtain a reverberation sub-signal corresponding to each audio output channel.
As an optional implementation, the processing apparatus may further include:
a setting unit 305, configured to preset a gain value of each audio output channel at each time to obtain a preset gain value of each audio output channel; wherein, the gain value of each audio output channel is periodically changed; in each period, the gain value of each audio output channel at each moment is linearly related to time, and the sum of the gain values of all the audio output channels is 1.
It will be appreciated that since the gain value of each audio output channel varies periodically and the gain value of each audio output channel at each instant in time is linearly related to time in each period, the processing means may apportion the reverberation signal corresponding to each audio input channel to the plurality of audio output channels over the time period.
By implementing the optional embodiment, a method for presetting the gain value of each audio output channel is provided, that is, by linearly setting the gain value of each audio output channel at each moment, since the sum of the gain values of all the audio output channels is 1, the reverberation signal input by each audio input channel can be distributed to a plurality of audio output channels, and based on the time-varying characteristic and the periodic characteristic of the gain value, the gain value of the reverberation signal corresponding to each audio input channel can be distributed to the plurality of audio output channels according to a certain proportion along the time period, which is beneficial to improving the sound field uniformity.
As an optional implementation, the processing apparatus may further include:
a second obtaining unit 306, configured to, in a process that the output unit 304 outputs the reverberation sub-signal through the audio output channel, if a superposition instruction input by a user is detected, obtain an audio content corresponding to the reverberation sub-signal output by the audio output channel at a current time;
the output unit 304 is further configured to repeatedly output the audio content corresponding to the reverberation sub-signal output by the audio output channel at the current time according to the response time of the user inputting the superposition instruction.
By implementing the optional implementation mode, the audio content corresponding to the reverberation sub-signal output by the audio output channel at the current moment is repeatedly output according to the response time of the superposition instruction input by the user, so that the user experience can be improved, and the processing device is more personalized.
In the embodiment of the present invention, in order to avoid that the program performance cannot be smoothly performed due to the fact that the device is damaged and the staff is not aware of the device, as an optional implementation manner, before the first obtaining unit 301 obtains the audio signals of the multiple audio input channels, the following steps may be further performed:
sending detection signals to a plurality of pickup devices and a plurality of public address devices which are connected with the processing device;
detecting whether a first signal fed back by pickup equipment and a second signal fed back by public address equipment are received within a preset time;
if the received first signal fed back by the pickup equipment is inconsistent with the total number of the pickup equipment, acquiring first equipment information of the pickup equipment which does not feed back the first signal, and sending the first equipment information to a worker to remind the worker to maintain the pickup equipment which does not feed back the first signal in time;
and if the received second signal fed back by the public address equipment is inconsistent with the total number of the public address equipment, acquiring second equipment information of the public address equipment which does not feed back the second signal, and sending the second equipment information to a worker to remind the worker to maintain the public address equipment which does not feed back the second signal in time.
By implementing the optional implementation mode, whether the sound pickup equipment and the sound amplifying equipment are damaged or not can be detected in advance, and the smooth progress of the program performance is ensured.
It can be seen that, with the processing apparatus described in fig. 4, by distributing the reverberation signal obtained after the reverberation processing to the plurality of audio output channels, each audio output channel obtains the reverberation sub-signal from a different audio input channel, and then outputs the reverberation sub-signal through the corresponding audio output channel, the sound field uniformity of the hall can be improved, thereby improving the reverberation adjustment effect. In addition, implementing the processing apparatus described in fig. 4, a method for performing reverberation processing on an audio signal is provided, and the reverberation processing effect can be further improved by calling the matched reverberation simulation parameters according to the performance information of the designated hall and performing reverberation processing on the audio signal according to the reverberation simulation parameters. By implementing the processing apparatus described in fig. 4, the reverberation signal corresponding to each audio input channel is distributed to a plurality of audio output channels according to the preset gain value of each audio output channel, so that the sound field uniformity of the hall can be further improved.
EXAMPLE five
Referring to fig. 5, fig. 5 is a schematic structural diagram of another processing apparatus according to an embodiment of the disclosure. As shown in fig. 5, the processing means may include:
a memory 501 in which executable program code is stored;
a processor 502 coupled to a memory 501;
the processor 502 calls the executable program code stored in the memory 501 to execute any one of the audio signal mixing processing methods of fig. 1 to 2.
An embodiment of the present invention discloses a computer-readable storage medium storing a computer program, wherein the computer program causes a computer to execute a mixing processing method of an audio signal according to any one of fig. 1 to 2.
An embodiment of the present invention discloses a computer program product, which includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to cause a computer to execute a mixing processing method of an audio signal of any one of fig. 1 to 2.
The embodiment of the present invention also discloses an application publishing platform, wherein the application publishing platform is used for publishing a computer program product, and when the computer program product runs on a computer, the computer is caused to execute part or all of the steps of the method in the above method embodiments.
It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. Those skilled in the art should also appreciate that the embodiments described in this specification are exemplary and alternative embodiments, and that the acts and modules illustrated are not required in order to practice the invention.
In various embodiments of the present invention, it should be understood that the sequence numbers of the above-mentioned processes do not imply an inevitable order of execution, and the execution order of the processes should be determined by their functions and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated units, if implemented as software functional units and sold or used as a stand-alone product, may be stored in a computer accessible memory. Based on such understanding, the technical solution of the present invention, which is a part of or contributes to the prior art in essence, or all or part of the technical solution, can be embodied in the form of a software product, which is stored in a memory and includes several requests for causing a computer device (which may be a personal computer, a server, a network device, or the like, and may specifically be a processor in the computer device) to execute part or all of the steps of the above-described method of each embodiment of the present invention.
In the embodiments provided herein, it should be understood that "B corresponding to a" means that B is associated with a from which B can be determined. It should also be understood, however, that determining B from a does not mean determining B from a alone, but may also be determined from a and/or other information.
In various embodiments of the present invention, it is understood that the meaning of "a and/or B" means that a and B are each present alone or both a and B are included.
It will be understood by those skilled in the art that all or part of the steps in the methods of the embodiments described above may be implemented by hardware instructions of a program, and the program may be stored in a computer-readable storage medium, where the storage medium includes Read-Only Memory (ROM), Random Access Memory (RAM), Programmable Read-Only Memory (PROM), Erasable Programmable Read-Only Memory (EPROM), One-time Programmable Read-Only Memory (OTPROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Compact Disc Read-Only Memory (CD-ROM), or other Memory, such as a magnetic disk, or a combination thereof, A tape memory, or any other medium readable by a computer that can be used to carry or store data.
The above detailed description is provided for the mixing processing method and processing apparatus of audio signals disclosed in the embodiments of the present invention, and the specific examples are applied herein to explain the principles and embodiments of the present invention, and the above description of the embodiments is only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims (6)

1. A mixing processing method for audio signals, the method being applied to a processing apparatus which connects a plurality of sound pickup devices and a plurality of sound amplifying devices, wherein each of the sound pickup devices corresponds to an audio input channel, and each of the sound amplifying devices corresponds to an audio output channel, the method comprising:
acquiring audio signals of a plurality of audio input channels;
performing reverberation processing on the audio signals to obtain reverberation signals corresponding to each audio input channel;
presetting a gain value of each audio output channel at each moment to obtain a preset gain value of each audio output channel; wherein the gain value of each audio output channel is periodically changed; in each period, the gain value of each audio output channel at each moment is in a linear correlation with time, and the sum of the gain values of all the audio output channels is 1;
distributing the reverberation signal corresponding to each audio input channel to a plurality of audio output channels according to a preset gain value of each audio output channel to obtain a reverberation sub-signal corresponding to each audio output channel;
outputting the reverberant sub-signal through the audio output channel.
2. The method of claim 1, wherein the reverberation processing of the audio signal to obtain a reverberation signal for each of the audio input channels comprises:
acquiring performance information of a designated hall; the performance information at least comprises performance programs and the space size of the appointed hall;
calling reverberation simulation parameters matched with the performance information;
and according to the reverberation simulation parameters, performing reverberation processing on the audio signals to obtain reverberation signals corresponding to each audio input channel.
3. The method according to claim 1 or 2, characterized in that the method further comprises:
in the process of outputting the reverberation sub-signal through the audio output channel, if a superposition instruction input by a user is detected, acquiring audio content corresponding to the reverberation sub-signal output by the audio output channel at the current moment;
and repeatedly outputting the audio content according to the response time of the sound superposition instruction input by the user.
4. A processing apparatus, wherein the processing apparatus is connected to a plurality of sound pickup devices and a plurality of sound amplification devices, wherein each of the sound pickup devices corresponds to an audio input channel, and wherein each of the sound amplification devices corresponds to an audio output channel, the processing apparatus comprising:
a first acquisition unit configured to acquire audio signals of a plurality of the audio input channels;
the reverberation processing unit is used for carrying out reverberation processing on the audio signals to obtain reverberation signals corresponding to each audio input channel;
the setting unit is used for presetting the gain value of each audio output channel at each moment so as to obtain the preset gain value of each audio output channel; wherein the gain value of each audio output channel is periodically changed; in each period, the gain value of each audio output channel at each moment is in a linear correlation with time, and the sum of the gain values of all the audio output channels is 1;
the distribution unit is used for distributing the reverberation signal corresponding to each audio input channel to a plurality of audio output channels according to the preset gain value of each audio output channel so as to obtain the reverberation sub-signal corresponding to each audio output channel;
an output unit for outputting the reverberation sub-signal through the audio output channel.
5. The processing apparatus as defined in claim 4, wherein the reverberation processing unit comprises:
the acquisition subunit is used for acquiring performance information of the designated hall; the performance information at least comprises performance programs and the space size of the appointed hall;
the calling subunit is used for calling reverberation simulation parameters matched with the performance information;
and the processing subunit is configured to perform reverberation processing on the audio signal according to the reverberation simulation parameter to obtain a reverberation signal corresponding to each audio input channel.
6. The processing apparatus according to claim 4 or 5, characterized in that the processing apparatus further comprises:
the second obtaining unit is used for obtaining the audio content corresponding to the reverberation sub-signal output by the audio output channel at the current moment if a reverberation instruction input by a user is detected in the process of outputting the reverberation sub-signal through the audio output channel;
the output unit is further configured to repeatedly output the audio content according to a response duration of the superposition instruction input by the user.
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