CN109600703A - Sound reinforcement system and its public address method and computer readable storage medium - Google Patents
Sound reinforcement system and its public address method and computer readable storage medium Download PDFInfo
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- CN109600703A CN109600703A CN201811619254.6A CN201811619254A CN109600703A CN 109600703 A CN109600703 A CN 109600703A CN 201811619254 A CN201811619254 A CN 201811619254A CN 109600703 A CN109600703 A CN 109600703A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R27/00—Public address systems
- H04R27/04—Electric megaphones
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/02—Circuits for transducers, loudspeakers or microphones for preventing acoustic reaction, i.e. acoustic oscillatory feedback
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Abstract
The invention discloses a kind of public address methods of sound reinforcement system, sound reinforcement system include public address host, at least one closely say voice acquisition device and at least one far say voice acquisition device, it closely says voice acquisition device and far says that voice acquisition device is connect with public address host respectively, closely say that the distance between voice acquisition device and sound source are less than and far say the distance between voice acquisition device and sound source；The public address method of sound reinforcement system carries out audio pre-treatment to the first audio signal the following steps are included: when receiving the first audio signal for closely saying voice acquisition device acquisition and far saying the second audio signal of voice acquisition device acquisition；The first audio signal after audio pre-treatment is subjected to public address broadcasting.Invention additionally discloses a kind of sound reinforcement system and computer readable storage mediums.This invention ensures that the sound quality for the audio signal that public address plays.
Description
Technical field
The present invention relates to sound processing techniques fields more particularly to a kind of sound reinforcement system and its public address method and computer can
Read storage medium.
Background technique
In education sector, classroom lectures do not have to sound reinforcement system usually, or use easy sound reinforcement system.And it is easy
Sound reinforcement system is only to amplify the sound of teacher by sound amplifiers such as sound equipments, and this public address scheme sound quality is not good enough, can be right
Hearing impairment namely sound reinforcement system is caused to ask there are the sound quality of audio signal is poor close to the academics and students of sound amplifier
Topic.
Summary of the invention
The main purpose of the present invention is to provide sound reinforcement system and its public address method and computer readable storage mediums, it is intended to
Solve the problems, such as that the sound quality of sound reinforcement system is poor.
To achieve the above object, the present invention provides a kind of public address method of sound reinforcement system, and the sound reinforcement system includes public address
Host, at least one closely say voice acquisition device and at least one far say voice acquisition device, it is described closely to say that voice collecting fills
Set and it is described far say that voice acquisition device is connect with the public address host respectively, it is described closely say voice acquisition device and sound source it
Between distance be less than and described far say the distance between voice acquisition device and sound source；The public address method of the sound reinforcement system include with
Lower step:
Receive it is described closely say voice acquisition device acquisition the first audio signal and it is described far say voice collecting fill
When setting the second audio signal of acquisition, audio pre-treatment is carried out to first audio signal, wherein the audio pre-treatment packet
Include at least one of noise reduction process, filtering processing, parametric equalization adjusting processing, volume adjustment processing and gain process；
First audio signal after audio pre-treatment is subjected to public address broadcasting.
In one embodiment, the public address method of the sound reinforcement system, further includes:
Receive it is described closely say voice acquisition device acquisition the first audio signal and it is described far say voice collecting fill
When setting the second audio signal of acquisition, the broadcasting end of first audio signal is determined；
When the broadcasting end is the terminal of preset kind, before executing the progress audio to first audio signal
The step of reason；
Chauvent's criterion processing is carried out to first audio signal after audio pre-treatment；
Chauvent's criterion treated the first audio signal is subjected to public address broadcasting.
In one embodiment, after the step of broadcasting end of the determination first audio signal, further includes:
When the broadcasting end is the remote terminal connecting with the public address main-machine communication, the remote terminal transmission is obtained
Remote audio signal；
Audio pre-treatment is carried out to first audio signal and second audio signal, and according to the long-range sound
Frequency signal is to first audio signal and second audio signal progress echo inhibition processing after audio pre-treatment；
Treated the first audio signal and the second audio signal is inhibited to be sent to remote terminal echo.
In one embodiment, the public address host further includes local audio input module, the public address side of the sound reinforcement system
Method, further includes:
It detects whether to receive the third audio signal that local audio input module inputs；
When not receiving the third audio signal, execute it is described by audio to the first audio signal carry out audio before
The step of reason.
In one embodiment, the step of the third audio signal for detecting whether to receive the input of local audio input module
After rapid, further includes:
When receiving the third audio signal, first audio signal and the third audio signal are carried out
Audio pre-treatment；
By first audio signal and third audio signal progress stereo process after audio pre-treatment, so that institute
State background audio of the third audio signal as treated the first audio signal；
The first audio signal after stereo process is subjected to public address broadcasting.
In one embodiment, the step of the third audio signal for detecting whether to receive the input of local audio input module
After rapid, further includes:
When receiving the third audio signal, judge whether the public address host opens the preferential of third audio signal
Mode；
The mode of priority of third audio signal is not opened in the public address host, is executed described to first audio signal
And the third audio signal carries out the step of audio pre-treatment；
When the public address host opens the mode of priority of third audio signal, audio is carried out to the third audio signal
Pre-treatment, and the third audio signal after audio pre-treatment is subjected to public address broadcasting.
In one embodiment, first audio signal after the pre-treatment by audio carries out the step of public address broadcasting and wraps
It includes:
Power amplification is carried out to first audio signal after audio pre-treatment, to obtain the 4th audio signal；
By the 4th audio signal transmission to the speaker being connect with the public address main body, so that described in the speaker is corresponding
4th audio signal carries out public address broadcasting.
In one embodiment, the public address method of the sound reinforcement system, further includes:
Closely said described in detecting real-time voice acquisition device and it is described far say voice acquisition device whether collect audio letter
Number；
Closely say that voice acquisition device collects the first audio signal described, alternatively, described closely say that voice acquisition device is adopted
Collect the first audio signal and described far when saying that voice acquisition device collects the second audio signal, executes described to the first sound
Frequency signal carries out the step of audio pre-treatment；
It is described far say that voice acquisition device collects the second audio signal when, to second audio signal carry out audio
Pre-treatment；
Second audio signal after audio pre-treatment is subjected to public address broadcasting.
To achieve the above object, the present invention also provides a kind of sound reinforcement system, sound reinforcement system include public address host, at least one
Closely say voice acquisition device and at least one far say voice acquisition device, it is described closely to say voice acquisition device and described far say
Voice acquisition device is connect with the public address host respectively, described closely to say that the distance between voice acquisition device and sound source are less than institute
It states and far says the distance between voice acquisition device and sound source；The public address host includes processor, memory and is stored in described
On memory and the public address program that can run on the processor, realized such as when the public address program is executed by the processor
Each step of the public address method of the upper sound reinforcement system.
To achieve the above object, the present invention also provides a kind of computer readable storage medium, the computer-readable storages
Media storage has public address program, and the public address program realizes the public address of sound reinforcement system as described above when being executed by the processor
Each step of method.
Sound reinforcement system provided by the invention and its public address method and computer readable storage medium, sound reinforcement system include public address
Host, and closely say voice acquisition device with what public address host was separately connected and far say voice acquisition device, closely say voice collecting
The distance between device and sound source, which are less than, far says the distance between voice acquisition device and sound source, receives in public address host and closely says
First audio signal of voice acquisition device acquisition and the second audio signal for far saying voice acquisition device acquisition, to the first sound
Frequency signal carries out in noise reduction process, filtering processing, parametric equalization adjusting processing, volume adjustment processing and gain process at least
A kind of audio pre-treatment, to carry out public address broadcasting to the first audio signal after audio pre-treatment；Due to sound reinforcement system branch
Short distance and at a distance audio public address are held, and is receiving short distance audio signal and remote audio when public address host
When signal, audio pre-treatment only is carried out to short distance audio signal, and public address plays the short distance audio signal of audio pre-treatment,
Enable sound reinforcement system that audio sound quality is lost lesser short distance audio signal and carry out public address broadcasting, and due to by low coverage
Audio pre-treatment is carried out from audio signal, further ensures the sound quality of audio signal.
Detailed description of the invention
Fig. 1 be the present embodiments relate to sound reinforcement system schematic diagram；
Fig. 2 is the hardware structural diagram of public address host in sound reinforcement system of the present invention；
Fig. 3 is the flow diagram of the public address method first embodiment of sound reinforcement system of the present invention；
Fig. 4 is the flow diagram of the public address method second embodiment of sound reinforcement system of the present invention；
Fig. 5 is the flow diagram of the public address method 3rd embodiment of sound reinforcement system of the present invention；
Fig. 6 is the flow diagram of the public address method fourth embodiment of sound reinforcement system of the present invention.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
The primary solutions of the embodiment of the present invention are: receiving first sound for closely saying voice acquisition device acquisition
When frequency signal and second audio signal for far saying voice acquisition device acquisition, audio is carried out to first audio signal
Pre-treatment, wherein the audio pre-treatment includes noise reduction process, filtering processing, parametric equalization adjusting processing, volume adjustment processing
And at least one of gain process；First audio signal after audio pre-treatment is subjected to public address broadcasting.
Since sound reinforcement system supports short distance and at a distance audio public address, and received closely when public address host
When audio signal and telematic audio signal, audio pre-treatment only is carried out to short distance audio signal, and public address plays audio
The short distance audio signal of pre-treatment enables sound reinforcement system that audio sound quality is lost lesser short distance audio signal and carries out
Public address plays, and due to further ensuring the sound quality of audio signal by carrying out audio pre-treatment to short distance audio signal.
Referring to Fig.1, Fig. 1 is the schematic diagram of sound reinforcement system of the present invention.
Sound reinforcement system includes public address host 100, closely says voice acquisition device 200 and far say voice acquisition device 300, closely
It says voice acquisition device 200 and far says that voice acquisition device 300 is connect with public address host 100 respectively, closely say that voice collecting fills
Setting 200 can be wireless microphone, far say that voice acquisition device 200 can be wire microphone, closely say that voice acquisition device 200 is used for
The audio signal within the scope of first distance is acquired, and far says voice acquisition device 300 for acquiring the sound within the scope of second distance
Frequency signal, second distance range are greater than first distance range.Closely say that voice acquisition device 200 passes through wireless connection technology and amplifies
The connection of host 100 (is represented by dotted lines the connection of the two), far says that voice acquisition device 300 is connected by route and amplification host machine 100
It connects and (indicates the connection of the two with solid line).
As a kind of implementation, public address host can be as shown in Figure 2.
For the embodiment of the present invention what is involved is the public address host in sound reinforcement system, public address host includes: processor 101,
Such as CPU, memory 102, communication bus 103.Wherein, communication bus 103 is for realizing the connection communication between these components.
Memory 102 can be high speed RAM memory, be also possible to stable memory (non-
), such as magnetic disk storage volatilememory.As shown in Figure 1, the memory as a kind of computer readable storage medium
It may include public address program in 102；And processor 101 can be used for calling the public address program stored in memory 102, and execute
It operates below:
Receive it is described closely say voice acquisition device acquisition the first audio signal and it is described far say voice collecting fill
When setting the second audio signal of acquisition, audio pre-treatment is carried out to first audio signal, wherein the audio pre-treatment packet
Include at least one of noise reduction process, filtering processing, parametric equalization adjusting processing, volume adjustment processing and gain process；
First audio signal after audio pre-treatment is subjected to public address broadcasting.
In one embodiment, processor 101 can be used for calling the public address program stored in memory 102, and execute with
Lower operation:
Receive it is described closely say voice acquisition device acquisition the first audio signal and it is described far say voice collecting fill
When setting the second audio signal of acquisition, the broadcasting end of first audio signal is determined；
When the broadcasting end is the terminal of preset kind, before executing the progress audio to first audio signal
The step of reason；
Chauvent's criterion processing is carried out to first audio signal after audio pre-treatment；
Chauvent's criterion treated the first audio signal is subjected to public address broadcasting.
In one embodiment, processor 101 can be used for calling the public address program stored in memory 102, and execute with
Lower operation:
When the broadcasting end is the remote terminal connecting with the public address main-machine communication, the remote terminal transmission is obtained
Remote audio signal；
Audio pre-treatment is carried out to first audio signal and second audio signal, and according to the long-range sound
Frequency signal is to first audio signal and second audio signal progress echo inhibition processing after audio pre-treatment；
Treated the first audio signal and the second audio signal is inhibited to be sent to remote terminal echo.
In one embodiment, processor 101 can be used for calling the public address program stored in memory 102, and execute with
Lower operation:
It detects whether to receive the third audio signal that local audio input module inputs；
When not receiving the third audio signal, execute it is described by audio to the first audio signal carry out audio before
The step of reason.
In one embodiment, processor 101 can be used for calling the public address program stored in memory 102, and execute with
Lower operation:
When receiving the third audio signal, first audio signal and the third audio signal are carried out
Audio pre-treatment；
By first audio signal and third audio signal progress stereo process after audio pre-treatment, so that institute
State background audio of the third audio signal as treated the first audio signal；
The first audio signal after stereo process is subjected to public address broadcasting.
In one embodiment, processor 101 can be used for calling the public address program stored in memory 102, and execute with
Lower operation:
When receiving the third audio signal, judge whether the public address host opens the preferential of third audio signal
Mode；
The mode of priority of third audio signal is not opened in the public address host, is executed described to first audio signal
And the third audio signal carries out the step of audio pre-treatment；
When the public address host opens the mode of priority of third audio signal, audio is carried out to the third audio signal
Pre-treatment, and the third audio signal after audio pre-treatment is subjected to public address broadcasting.
In one embodiment, processor 101 can be used for calling the public address program stored in memory 102, and execute with
Lower operation:
Power amplification is carried out to first audio signal after audio pre-treatment, to obtain the 4th audio signal；
By the 4th audio signal transmission to the speaker being connect with the public address host, so that described in the speaker is corresponding
4th audio signal carries out public address broadcasting.
In one embodiment, processor 101 can be used for calling the public address program stored in memory 102, and execute with
Lower operation:
Closely said described in detecting real-time voice acquisition device and it is described far say voice acquisition device whether collect audio letter
Number；
Closely say that voice acquisition device collects the first audio signal described, alternatively, described closely say that voice acquisition device is adopted
Collect the first audio signal and described far when saying that voice acquisition device collects the second audio signal, executes described to the first sound
Frequency signal carries out the step of audio pre-treatment；
It is described far say that voice acquisition device collects the second audio signal when, to second audio signal carry out audio
Pre-treatment；
Second audio signal after audio pre-treatment is subjected to public address broadcasting.
For the present embodiment according to above scheme, sound reinforcement system includes public address host, and is separately connected with public address host close
It says voice acquisition device and far says voice acquisition device, closely say that the distance between voice acquisition device and sound source are less than and far say voice
The distance between acquisition device and sound source, public address host receive closely say voice acquisition device acquisition the first audio signal with
And far say the second audio signal of voice acquisition device acquisition, noise reduction process, filtering processing, parameter are carried out to the first audio signal
The audio pre-treatment of at least one of well-balanced adjustment processing, volume adjustment processing and gain process, thus before to audio
The first audio signal after reason carries out public address broadcasting；Since sound reinforcement system supports short distance and at a distance audio public address, and
When public address host receives short distance audio signal and telematic audio signal, sound only is carried out to short distance audio signal
Frequency pre-treatment, and public address plays the short distance audio signal of audio pre-treatment, and sound reinforcement system is lost audio sound quality
Lesser short distance audio signal carries out public address broadcasting, and due to by carrying out audio pre-treatment to short distance audio signal, into one
Step ensure that the sound quality of audio signal.
Based on the hardware architecture of above-mentioned public address host, the embodiment of the public address method of sound reinforcement system of the present invention is proposed.
Referring to Fig. 3, Fig. 3 be the present invention is based on the first embodiment of the public address method of sound reinforcement system, the sound reinforcement system
Public address method the following steps are included:
Step S10 is receiving first audio signal for closely saying voice acquisition device acquisition and described is far saying language
When the second audio signal of sound acquisition device acquisition, audio pre-treatment is carried out to first audio signal, wherein the audio
Pre-treatment include noise reduction process, filtering processing, parametric equalization adjusting processing, volume adjustment processing and gain process at least
It is a kind of；
In the present invention, sound reinforcement system can be applied to the place that classroom, large-scale activity etc. need public address, and sound reinforcement system includes
Public address host, and what is connect with public address host closely say voice acquisition device and far say voice acquisition device, closely say that voice is adopted
Acquisition means and far to say that voice acquisition device can be set to multiple, closely say that voice acquisition device can be wireless microphone, wirelessly
Microphone can be portable microphone.
Public address host includes radio access module, and radio access module, which is used to receive, closely says the of voice acquisition device acquisition
One audio signal；Public address host further includes access in radio module, and access in radio module far says that voice acquisition device is adopted for receiving
Second audio signal of collection.Radio access module receives the first sound for closely saying voice acquisition device acquisition by wireless access technology
Frequency signal, wireless access technology include being not limited to 2.4GHz wireless technology, bluetooth.
Voice acquisition device is closely said using 2.4GHz wireless technology, then public address host need to be equipped with receiver, to realize close
Say that voice acquisition device quickly transmits the purpose of audio signal；And it ought closely say voice acquisition device using blue tooth transmission audio frequency letter
Number when, public address host need to be equipped with corresponding bluetooth module；Public address host needs and closely says that voice acquisition device is matched in advance.
Be provided with function of dodging in public address host, when simultaneously receive the first audio signal and the second audio when, only
Public address output is carried out to the first audio signal, namely public address output only is carried out to the audio signal of short distance.Specifically, public address master
Machine carries out audio pre-treatment when receiving the first audio signal and the second audio signal, to the first audio signal, before audio
Processing includes at least one of noise reduction process, filtering processing, parametric equalization processing, volume adjustment processing and gain process,
It is preferred that carrying out above-mentioned all processing to the first audio signal.Audio pre-treatment is by the input audio processing module in public address host
It executes, the algorithm that input audio processing module uses may include high-pass filtering, low-pass filtering, parametric equalization, compressor, volume control
Device, peak value meter and adaptive automatic noise reduction scheduling algorithm processed, input audio processing module pass through the corresponding sound of above-mentioned algorithm progress
Frequency pre-treatment.It should be noted that not limiting the sequence of each audio pre-treatment in the present invention, but the processing of audio pre-treatment
Sequence is preferably are as follows: filtering processing, parametric equalization processing, volume adjustment processing, gain process and noise reduction process.
First audio signal after audio pre-treatment is carried out public address broadcasting by step S20.
Public address host further includes Audio Matrix module and output audio processing modules, is exported in input audio processing module
When the first audio signal after audio pre-treatment, by the first audio signal transmission after audio pre-treatment to Audio Matrix module
In, Audio Matrix module is switched over and is distributed to the audio signal, namely before the audio inputted to input audio processing module
After the first audio signal that treated carries out matrix switch, then output audio processing modules are sent it to, exports audio processing
Module includes parametric equalization, volume control scheduling algorithm, and output audio processing modules can be to the first audio after audio pre-treatment
Signal carries out power amplification, to obtain the 4th audio signal.
Exporting audio processing modules further includes that power amplifier output module and non-power amplifier output module, power amplifier output module can connect
Speaker namely power amplifier module are connect by the 4th audio signal transmission to speaker, is broadcast so that speaker carries out public address to the 4th audio signal
It puts；Rather than power amplifier output module can connect recorded broadcast host, be recorded by recorded broadcast host to the 4th audio signal.4th sound
Frequency signal can simultaneously by speaker play and recorded broadcast host record, can also by the 4th audio signal transmission to public address main-machine communication
The remote terminal of connection.
In actual application scenarios, the sound that teacher or host issue varies, in order to make place
Interior personnel do not hear, and the audio signal of public address can be arranged minimal volume thresholding, and minimal volume thresholding can guarantee the personnel in place
Can not hear the sound of teacher or host, while max volume thresholding is arranged to the audio signal of public address, avoid teacher or
Host's sound is excessive, causes the public address volume of audio signal excessive, to cause hearing impairment to the personnel in place.
It is also possible to provide environmental noise sensor, environmental noise sensor acquires the environmental noise in place, by ring
The volume of border noise is sent to public address host, and public address host needs public address to play by the volume adjustment appropriate of environmental noise
Audio signal avoids the occurrence of the case where brouhaha covers the sound of host or teacher, and can reduce under quiet environment
The audio signal for needing public address to export, avoids the occurrence of the excessive situation of volume.In this manner, so that classroom or playground
Ground reach dynamic equilibrium with merge, really implement easily listen to.
In technical solution provided in this embodiment, sound reinforcement system includes public address host, and is connected respectively with public address host
Closely saying for connecing and far says voice acquisition device at voice acquisition device, closely says the distance between voice acquisition device and sound source less than far
It says the distance between voice acquisition device and sound source, the first audio for closely saying voice acquisition device acquisition is received in public address host
Signal and the second audio signal for far saying voice acquisition device acquisition, at the first audio signal progress noise reduction process, filtering
The audio pre-treatment of at least one of reason, parametric equalization adjusting processing, volume adjustment processing and gain process, thus to sound
The first audio signal after frequency pre-treatment carries out public address broadcasting；Since sound reinforcement system supports that closely and at a distance audio expands
Sound, and when public address host receives short distance audio signal and telematic audio signal, only to short distance audio signal
Audio pre-treatment is carried out, and public address plays the short distance audio signal of audio pre-treatment, enables sound reinforcement system by audio sound
Matter loses lesser short distance audio signal and carries out public address broadcasting, and due to before by carrying out audio to short distance audio signal
Reason, further ensures the sound quality of audio signal.
It is the second embodiment of the public address method of sound reinforcement system of the present invention referring to Fig. 4, Fig. 4, is based on first embodiment, it is described
The public address method of sound reinforcement system, further includes:
Step S30 is receiving first audio signal for closely saying voice acquisition device acquisition and described is far saying language
When the second audio signal of sound acquisition device acquisition, the broadcasting end of first audio signal is determined；
Step S40 is executed described to first audio signal progress when the broadcasting end is the terminal of preset kind
The step of audio pre-treatment；
Step S50 carries out chauvent's criterion processing to first audio signal after audio pre-treatment；
Chauvent's criterion treated the first audio signal is carried out public address broadcasting by step S60；
Step S70 is obtained described long-range when the broadcasting end is the remote terminal connecting with the public address main-machine communication
The remote audio signal of terminal transmission；
Step S80 carries out audio pre-treatment to first audio signal and second audio signal, and according to institute
Remote audio signal is stated to first audio signal and second audio signal progress echo suppression after audio pre-treatment
System processing；
Echo is inhibited treated the first audio signal and the second audio signal to be sent to remote terminal by step S90.
Audio signal can carry out local public address and remote playing.Local public address refers to connecting speaker with public address host
Or the local of other sound amplifiers plays, and sets the equipment that speaker etc. is connect with public address host to the broadcasting of preset kind
End；Remote playing refers to the terminal that the audio signal transmission of acquisition is extremely connect with public address host connection communication by public address host,
The terminal and public address host realize telecommunication, for example, video conference etc..
And when carrying out remote playing, sound reinforcement system and remote terminal carry out voice interface namely the connection of public address host
Speaker can play the remote audio signal of remote terminal transmission, but teacher or host can occur simultaneously for public address host
Audio signal transmission inevitably comes in remote audio signal to acquisition to remote terminal, and when acquiring audio signal,
Therefore it needs to closely saying and far say that voice acquisition device acquisition audio signal carries out echo inhibition processing, namely eliminate as far as possible long-range
The echo that audio signal generates.In this regard, when public address host receives the first audio signal and the second audio signal simultaneously, really
The broadcasting end of fixed first audio signal, when playing end and being to connect remote terminal with public address main-machine communication namely remote terminal
When being interactive model between sound reinforcement system, then before needing to carry out audio to the first audio signal and the second audio signal
Reason, further according to remote audio signal to the first audio signal and the progress echo inhibition of the second audio signal after audio pre-treatment
Processing (namely remote audio signal in the audio signal of elimination voice acquisition device acquisition as far as possible) namely input audio processing
After module passes through AEC (Acoustic Echo Cancellation) adaptive acoustic echo restrainable algorithms to audio pre-treatment
First audio signal and the second audio signal carry out echo inhibition processing, then by echo first audio signal that inhibits that treated
And second audio signal be sent to remote terminal first audio signal and the second audio are believed so that remote terminal is realized
Number broadcasting.
When sound reinforcement system carries out local public address, it can unavoidably generate and utter long and high-pitched sounds, in order to reduce the howl of audio signal generation
It cries, needs to carry out chauvent's criterion processing to the audio signal of local public address；In this regard, when playing the terminal that end is preset kind,
Input audio processing module first carries out audio pre-treatment to the first audio signal, then uses AFC (Acoustic Feedback
Cancellation) adaptive acoustic feedback restrainable algorithms carry out at chauvent's criterion the first audio signal after audio pre-treatment
Reason plays so that chauvent's criterion treated the first audio signal is carried out local public address.
In technical solution provided in this embodiment, when receiving the first audio signal and the second audio signal, really
The broadcasting end of fixed first audio signal plays whether end is remote terminal to determine, if remote terminal is then needed to the first audio
Signal and the second audio signal carry out echo inhibition processing, to reduce the echo of audio signal remote playing generation；And
When play end be connect with public address main-machine communication be local broadcasting end when, then need at the first audio signal progress chauvent's criterion
Reason, to reduce uttering long and high-pitched sounds for the local public address generation of the first audio signal.
It is the 3rd embodiment of the public address method of sound reinforcement system of the present invention referring to Fig. 5, Fig. 5, is implemented based on the first or second
, after the step S10, further includes:
Step S100 detects whether the third audio signal for receiving the input of local audio input module；
Step S110, when not receiving the third audio signal, execute it is described by audio to the first audio signal into
The step of row audio pre-treatment；
Step S120, when receiving the third audio signal, to first audio signal and the third sound
Frequency signal carries out audio pre-treatment；
Step S130 carries out first audio signal after audio pre-treatment at audio mixing with the third audio signal
Reason, so that background audio of the third audio signal as treated the first audio signal；
The first audio signal after stereo process is carried out public address broadcasting by step S140.
In the present embodiment, public address host is additionally provided with route AM access module namely local audio input module, route access
Module can connect external equipment, and external equipment can be the smart machines such as computer, and external equipment can be by route AM access module to expansion
Sound host transmits source of sound, which can be used as the background music of audio signal.
In this regard, when receiving the first audio signal and the second audio signal, detect whether to receive local audio defeated
The third audio signal for entering module input then shows when not receiving third audio signal, namely not receiving local audio
First audio signal is broadcast without corresponding background music at this point, public address can be carried out to the first audio signal after audio pre-treatment
It puts；And when receiving third audio signal, then showing the first audio signal with corresponding background music, at this point, input
Audio processing modules first carry out audio pre-treatment to the first audio signal and third audio signal, then using Mixed Audio Algorithm to sound
The first audio signal and third audio signal after frequency pre-treatment carry out stereo process, believe by the first audio after stereo process
Number and third audio signal carry out public address broadcasting.
Above-mentioned is the scheme taken for local public address, and when the broadcasting end of the first audio signal is remote terminal,
Audio pre-treatment then is carried out to first, second and third audio signal, moreover is believed according to the remote audio that remote terminal is sent
Number echo inhibition processing is carried out to first, second and third audio signal after audio pre-treatment, then three sent together
To remote terminal.
In addition, settable sound mixing function on public address host, if needing when the sound mixing function starting of public address host to the first sound
Frequency signal and third audio signal carry out stereo process, if when the inactive sound mixing function of public address host, only to the first audio
Signal carries out public address broadcasting.
It should be noted that in the inactive sound mixing function of public address host, it can be to first, second and third audio signal
Public address priority be configured, for example, the public address priority of the first audio signal is set greater than third audio signal
Public address priority, and the public address priority of third audio signal is set greater than the second audio signal public address priority, user
Corresponding setting can be carried out on public address host, for example, teacher is when playing courseware, by the public address of courseware (third audio signal)
Priority setting is maximum, the public address priority of the sound (the second audio signal) of classmate is arranged minimum.
In one embodiment, there are three kinds of audio signals, only to closely saying that audio signal carries out public address broadcasting, namely to the
One audio signal carries out public address broadcasting；In another embodiment, a variety of audio signals if it exists are then come according to public address priority true
The public address volume of fixed various audio signals, the bigger audio signal of public address priority, volume are bigger.In this regard, can be set more
Audio volume processing function, namely in public address host-initiated Multi-audio-frequency volume processing function, according to the expansion of each audio signal
Sound priority determines corresponding volume, and carries out audio pre-treatment to each audio signal simultaneously, then simultaneously to each sound
Frequency signal carries out public address broadcasting；And when public address host be starting Multi-audio-frequency volume processing function when, only most to public address priority
Big audio signal carries out audio pre-treatment, and public address plays the audio signal after audio pre-treatment.
In technical solution provided in this embodiment, whether public address Host Detection is received as the sound for needing public address to play
The third audio signal of the background music of frequency signal then mixes the audio signal and third audio signal if receiving
Sound processing, so that the audio signal for needing public address to play be incorporated in background music.
It is the fourth embodiment of the public address method of sound reinforcement system of the present invention referring to Fig. 6, Fig. 6, implements based on first to third
, before the step S10, further includes:
Step S150 closely says voice acquisition device described in detecting real-time and described far says whether voice acquisition device acquires
To audio signal；
Step S160 closely says that voice acquisition device collects the first audio signal described, alternatively, described closely say that voice is adopted
Acquisition means collect the first audio signal and described far when saying that voice acquisition device collects the second audio signal, described in execution
The step of audio pre-treatment is carried out to the first audio signal；
Step S170, it is described far say that voice acquisition device collects the second audio signal when, to second audio believe
Number carry out audio pre-treatment；
Second audio signal after audio pre-treatment is carried out public address broadcasting by step S180；
Public address host meeting detecting real-time closely says voice acquisition device and far says whether voice acquisition device collects audio
Signal, if closely saying that voice acquisition device collects the first audio signal or closely says that voice acquisition device collects first
Audio signal and described far when saying that voice acquisition device collects the second audio signal, at this point, being to the audio signal closely said
Carry out public address broadcasting；And it when public address host receives only the second audio signal, is needing to carry out the second audio signal at this time
Second audio signal of audio pre-treatment is finally carried out public address broadcasting by audio pre-treatment.
The present invention also provides a kind of sound reinforcement system, sound reinforcement system include public address host, at least one closely say voice collecting fill
It sets and at least one far says voice acquisition device, it is described closely to say voice acquisition device and described far say voice acquisition device point
It is not connect with the public address host, it is described closely to say that the distance between voice acquisition device and sound source far say voice collecting less than described
The distance between device and sound source；The public address host includes processor, memory and is stored on the memory and can be
The public address program run on the processor, the public address program are realized described in embodiment as above when being executed by the processor
Each step of the public address method of sound reinforcement system.
The present invention also provides a kind of computer readable storage medium, the computer-readable recording medium storage has public address journey
Sequence, the public address program realize each of the public address method of sound reinforcement system described in embodiment as above when being executed by the processor
Step.
The serial number of the above embodiments of the invention is only for description, does not represent the advantages or disadvantages of the embodiments.
It should be noted that, in this document, the terms "include", "comprise" or its any other variant are intended to non-row
His property includes, so that the process, method, article or the device that include a series of elements not only include those elements, and
And further include other elements that are not explicitly listed, or further include for this process, method, article or device institute it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including being somebody's turn to do
There is also other identical elements in the process, method of element, article or device.
Through the above description of the embodiments, those skilled in the art can be understood that above-described embodiment side
Method can be realized by means of software and necessary general hardware platform, naturally it is also possible to by hardware, but in many cases
The former is more preferably embodiment.Based on this understanding, technical solution of the present invention substantially in other words does the prior art
The part contributed out can be embodied in the form of software products, which is stored in one as described above
In computer readable storage medium (such as ROM/RAM, magnetic disk, CD), including some instructions are used so that a terminal device (can
To be mobile phone, computer, server, audio processor or the network equipment etc.) execute side described in each embodiment of the present invention
Method.
The above is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (10)
1. a kind of public address method of sound reinforcement system, which is characterized in that the sound reinforcement system includes public address host, at least one closely says
Voice acquisition device and at least one far say voice acquisition device, it is described closely to say voice acquisition device and described far say voice
Acquisition device is connect with the public address host respectively, described closely to say that the distance between voice acquisition device and sound source are remote less than described
Say the distance between voice acquisition device and sound source；The public address method of the sound reinforcement system the following steps are included:
It is receiving first audio signal for closely saying voice acquisition device acquisition and described is far saying that voice acquisition device is adopted
When the second audio signal of collection, audio pre-treatment is carried out to first audio signal, wherein the audio pre-treatment includes drop
It makes an uproar processing, filtering processing, parametric equalization adjusting processing, volume adjustment processing and at least one of gain process；
First audio signal after audio pre-treatment is subjected to public address broadcasting.
2. the public address method of sound reinforcement system as described in claim 1, which is characterized in that the public address method of the sound reinforcement system,
Further include:
It is receiving first audio signal for closely saying voice acquisition device acquisition and described is far saying that voice acquisition device is adopted
When the second audio signal of collection, the broadcasting end of first audio signal is determined；
When the broadcasting end is the terminal of preset kind, execution is described to carry out audio pre-treatment to first audio signal
Step；
Chauvent's criterion processing is carried out to first audio signal after audio pre-treatment；
Chauvent's criterion treated the first audio signal is subjected to public address broadcasting.
3. the public address method of sound reinforcement system as claimed in claim 2, which is characterized in that determination first audio signal
Broadcasting end the step of after, further includes:
When the broadcasting end is the remote terminal connecting with the public address main-machine communication, the remote of the remote terminal transmission is obtained
Journey audio signal；
Audio pre-treatment is carried out to first audio signal and second audio signal, and is believed according to the remote audio
Number to after audio pre-treatment first audio signal and second audio signal carry out echo inhibition processing；
Treated the first audio signal and the second audio signal is inhibited to be sent to remote terminal echo.
4. the public address method of sound reinforcement system as described in claim 1, which is characterized in that the public address host further includes this rock noise
Frequency input module, the public address method of the sound reinforcement system, further includes:
It detects whether to receive the third audio signal that local audio input module inputs；
When not receiving the third audio signal, execution is described to carry out audio pre-treatment to the first audio signal for audio
Step.
5. the public address method of sound reinforcement system as claimed in claim 4, which is characterized in that described to detect whether to receive this rock noise
After the step of third audio signal of frequency input module input, further includes:
When receiving the third audio signal, audio is carried out to first audio signal and the third audio signal
Pre-treatment；
By after audio pre-treatment first audio signal and the third audio signal carry out stereo process so that described the
Background audio of three audio signals as treated the first audio signal；
The first audio signal after stereo process is subjected to public address broadcasting.
6. the public address method of sound reinforcement system as claimed in claim 5, which is characterized in that described to detect whether to receive this rock noise
After the step of third audio signal of frequency input module input, further includes:
When receiving the third audio signal, judge whether the public address host opens the preferential mould of third audio signal
Formula；
Do not open the mode of priority of third audio signal in the public address host, execute it is described to first audio signal and
The third audio signal carries out the step of audio pre-treatment；
When the public address host opens the mode of priority of third audio signal, before carrying out audio to the third audio signal
Reason, and the third audio signal after audio pre-treatment is subjected to public address broadcasting.
7. the public address method of sound reinforcement system as claimed in any one of claims 1 to 6, which is characterized in that described by audio pre-treatment
Rear first audio signal carries out the step of public address broadcasting and includes:
Power amplification is carried out to first audio signal after audio pre-treatment, to obtain the 4th audio signal；
By the 4th audio signal transmission to the speaker being connect with the public address main body, so that the speaker corresponds to the described 4th
Audio signal carries out public address broadcasting.
8. the public address method of sound reinforcement system as claimed in any one of claims 1 to 6, which is characterized in that the expansion of the sound reinforcement system
Method for acoustic, further includes:
Voice acquisition device is closely said described in detecting real-time and described far says whether voice acquisition device collects audio signal；
Closely say that voice acquisition device collects the first audio signal described, alternatively, described closely say that voice acquisition device collects
First audio signal and described far when saying that voice acquisition device collects the second audio signal executes and described believes the first audio
Number carry out audio pre-treatment the step of；
It is described far say that voice acquisition device collects the second audio signal when, to second audio signal carry out audio before
Reason；
Second audio signal after audio pre-treatment is subjected to public address broadcasting.
9. a kind of sound reinforcement system, which is characterized in that the sound reinforcement system include public address host, at least one closely say voice collecting fill
It sets and at least one far says voice acquisition device, it is described closely to say voice acquisition device and described far say voice acquisition device point
It is not connect with the public address host, it is described closely to say that the distance between voice acquisition device and sound source far say voice collecting less than described
The distance between device and sound source；The public address host includes processor, memory and is stored on the memory and can be
The public address program run on the processor realizes that claim 1-8 such as appoints when the public address program is executed by the processor
Each step of the public address method of sound reinforcement system described in one.
10. a kind of computer readable storage medium, which is characterized in that the computer-readable recording medium storage has public address journey
Sequence realizes the public address such as the described in any item sound reinforcement systems of claim 1-8 when the public address program is executed by the processor
Each step of method.
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