CN109618266A - Two-way real time phone call audio-frequency processing method and two-way real time phone call intercom system - Google Patents
Two-way real time phone call audio-frequency processing method and two-way real time phone call intercom system Download PDFInfo
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- CN109618266A CN109618266A CN201811314536.5A CN201811314536A CN109618266A CN 109618266 A CN109618266 A CN 109618266A CN 201811314536 A CN201811314536 A CN 201811314536A CN 109618266 A CN109618266 A CN 109618266A
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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
- H04R3/04—Circuits for transducers, loudspeakers or microphones for correcting frequency response
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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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- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
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Abstract
The invention discloses a kind of two-way real time phone call audio-frequency processing method and two-way real time phone call intercom systems, wherein, this method comprises: when receiving the first audio signal acquired in cockpit and the second audio signal acquired in passenger compartment simultaneously, the 4th audio signal of broadcasting in the interior third audio signal played of acquisition cockpit and acquisition passenger compartment；It analyzes the first audio signal and whether the second audio signal meets default noise reduction and disappear echo condition；When the first audio signal and/or the second audio signal meet default noise reduction disappear echo condition when, noise reduction is carried out to the first audio signal by third audio signal and is disappeared echo processing, and/or, believe the second audio that carrying out noise reduction disappears echo processing by the 4th audio signal.Present invention reduces the influences of noise and echo, to improve clarity, and then improve communication efficiency.
Description
Technical field
The present invention relates to interior intercom system more particularly to a kind of two-way real time phone call audio-frequency processing method and it is two-way in real time
Communicating talkback system.
Background technique
With popularizing for automobile, people's trip is also increasing to the dependence of automobile, when the same interior cockpit and multiplies
When main cabin has communication difficulty, need to meet the communication requirements between driver and occupant.For example: taxi, net about vehicle, rescue
Protect vehicle, caravan, the longer commercial vehicle of wheelbase, motor bus or drover's car etc..
But in communication process, it is understood that there may be a possibility that driver and occupant say simultaneously, and then there is the portion said
Divide a possibility that synchronous with the part listened, therefore, the interference for the part that the part listened will receive, or made an uproar by outside other
The influence of sound, so that the part listened thereby reduces communication efficiency there are unsharp problem.
Summary of the invention
The purpose of the present invention is to provide a kind of two-way real time phone call audio-frequency processing method and two-way real time phone call intercommunication systems
System, to solve existing interior communication, the existing part listened is unintelligible, links up efficient low problem.
To solve the above-mentioned problems, the present invention provides a kind of two-way real time phone call audio-frequency processing methods comprising as follows
Step:
When receiving the first audio signal acquired in cockpit and the second audio signal acquired in passenger compartment simultaneously,
The 4th audio signal for acquiring the third audio signal played in cockpit and being played in acquisition passenger compartment；
It analyzes the first audio signal and whether the second audio signal meets default noise reduction and disappear echo condition；
When the first audio signal and/or the default noise reduction of the second audio signal satisfaction disappear echo condition, pass through third audio
Signal to the first audio signal carry out noise reduction disappear echo processing, and/or, by the 4th audio signal to the second audio signal carry out
Noise reduction disappear echo processing.
As a further improvement of the present invention, noise reduction is carried out to the first audio signal by third audio signal to disappear at echo
Reason, and/or, by the 4th audio signal to the second audio believe carry out noise reduction disappear echo processing the step of, comprising:
The first audio signal and/or the second audio signal are analyzed with the presence or absence of echo；
When the first audio signal and/or the second audio signal are there are when echo, by third audio signal to the first audio
Signal carries out eliminating echo processing and/or carries out eliminating echo processing to the second audio signal by the 4th audio signal；
Echo treated audio signal is eliminated in analysis whether there is noise；
When eliminating echo treated audio signal there are when noise, to eliminating echo treated, audio signal drops
It makes an uproar processing, and the audio signal after noise reduction process is amplified into processing, and play enhanced processing in cockpit and/or passenger compartment
Audio signal afterwards.
As a further improvement of the present invention, it analyzes the first audio signal and/or the second audio signal whether there is echo
The step of after, further includes:
If echo is not present in the first audio signal and/or the second audio signal, the first audio signal and/or the are analyzed
Two audio signals whether there is noise；
When the first audio signal and/or the second audio signal are there are when noise, to the first audio signal and/or the second audio
Signal carries out noise reduction process, and the audio signal after noise reduction process is amplified processing, and broadcast in cockpit and/or passenger compartment
Audio signal after putting enhanced processing.
To solve the above-mentioned problems, the present invention provides a kind of two-way real time phone call intercom systems, are applied to automobile, vapour
Vehicle includes cockpit and passenger compartment, and two-way real time phone call intercom system includes:
Cockpit microphone, is set in cockpit, and for acquiring the first audio signal in cockpit；
Passenger compartment microphone, is set in passenger compartment, and for acquiring the second audio signal in passenger compartment；
At least one cockpit loudspeaker, is set in cockpit, and for playing required reception and registration in passenger compartment
Three audio signals；
At least one passenger compartment loudspeaker, is set in passenger compartment, and for playing required reception and registration in cockpit
Four audio signals；
Central control box, respectively with cockpit microphone, cockpit loudspeaker, passenger compartment microphone, passenger compartment loudspeaking
Device connection believes the first audio by third audio signal when receiving the first audio signal and the second audio signal simultaneously
It number carries out the noise reduction echo that disappears and handles to obtain fifth audio signal, and fifth audio signal is exported by passenger compartment loudspeaker, meanwhile,
The noise reduction echo that disappears is carried out to the second audio signal by the 4th audio signal to handle to obtain the 6th audio signal, and passes through cockpit
Loudspeaker hand exports the 6th audio signal.
As a further improvement of the present invention, central control box includes:
DSP is connect with cockpit microphone, cockpit loudspeaker, passenger compartment microphone, passenger compartment loudspeaker respectively,
When receiving the first audio signal and the second audio signal simultaneously, analyzes the first audio signal and whether the second audio signal deposits
In noise and/or echo；
Noise attenuation module, for passing through when the first audio signal or third audio signal are there are when noise and/or echo
Third audio signal carries out the noise reduction echo that disappears to the first audio signal and handles to obtain fifth audio signal, or is believed by the 4th audio
Number carrying out the noise reduction echo that disappears to the second audio signal handles to obtain the 6th audio signal.
As a further improvement of the present invention, further include:
Amplifier is connect with noise attenuation module, and for after institute's noise attenuation module noise reduction disappears echo processing
Fifth audio signal and/or the 6th audio signal amplify processing.
As a further improvement of the present invention, further include:
Cockpit belt switch volume controller, is set in cockpit, and for opening or closing cockpit microphone
With cockpit loudspeaker；
Passenger compartment belt switch volume controller, is set in passenger compartment, and for opening or closing passenger compartment microphone
With passenger compartment loudspeaker；
MCU is connect with cockpit belt switch volume controller, passenger compartment belt switch volume controller, DSP respectively.
As a further improvement of the present invention, further include:
Cockpit warning light, is set in cockpit, and cockpit warning light is connect with MCU, and for prompting cockpit
The working condition of microphone and cockpit loudspeaker；
Passenger compartment warning light is set to passenger compartment, and passenger compartment warning light is connect with MCU, and is used for prompt passengers cabin wheat
The working condition of gram wind and passenger compartment loudspeaker.
As a further improvement of the present invention, further include:
Power module is used for as the power supply of two-way real time phone call intercom system.
As a further improvement of the present invention, a partition is equipped between cockpit and passenger compartment.
Compared with prior art, the present invention ought receive the first audio signal of cockpit and the second sound of passenger compartment simultaneously
When frequency signal, the 4th audio signal played in the third audio signal and acquisition passenger compartment that are played in acquisition driver's cabin, when the
One audio signal and/or the second audio signal meet default noise reduction disappear echo condition when, by third audio signal to the first sound
Frequency signal carries out noise reduction and disappears echo processing, and/or, noise reduction is carried out to the second audio signal by the 4th audio signal and is disappeared at echo
Therefore reason reduces the noise in cockpit and plays influence of the echo of voice formation to the first audio signal, so as to
Clearly fifth audio signal is to passenger compartment for output, so that motroist knows driver's meaning to be expressed, meanwhile, it reduces
Noise in passenger compartment and the influence of echo that voice is formed to the second audio signal is played, so as to export clearly the 6th
Audio signal is to cockpit, so that driver knows motroist's meaning to be expressed, and then promote motroist and driver it
Between form effective communication, to improve communication efficiency.
Detailed description of the invention
Fig. 1 is the simple schematic diagram of application environment of the two-way real time phone call intercom system one embodiment of the present invention；
Fig. 2 is the flow diagram of the two-way real time phone call audio-frequency processing method one embodiment of the present invention；
Fig. 3 is that noise reduction disappears the stream of echo process flow one embodiment in the two-way real time phone call audio-frequency processing method of the present invention
Journey schematic diagram；
Fig. 4 is the circuit theory schematic diagram of the two-way real time phone call intercom system one embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, is clearly and completely retouched to the technical solution in embodiment
It states, similar reference numerals represent similar component in attached drawing.Obviously, will be described below embodiment is only the present invention one
Divide embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making
Every other embodiment obtained, shall fall within the protection scope of the present invention under the premise of creative work.
Fig. 1 illustrates one embodiment of the application environment of the two-way real time phone call intercom system of the present invention.In the present embodiment
In, which includes cockpit 1 and passenger compartment 2, and a partition 3 is equipped between cockpit 1 and passenger compartment 2.It should be noted that its
He does not have the two-way real time phone call intercom system of setting the present embodiment in the automobile of partition, also protection scope of the present invention with
It is interior.
Wherein, cockpit 1 is equipped with the cockpit microphone 10 for acquiring the first audio signal in cockpit 1
(MIC1), for playing the cockpit loudspeaker 11 (SPK1) of the third audio signal of required reception and registration in passenger compartment 2, for opening
Open or close the cockpit belt switch volume controller 12 (VOL1) of cockpit microphone 10 and cockpit loudspeaker 11, for mentioning
Show the cockpit warning light of the working condition of cockpit microphone 10 and cockpit loudspeaker 11.
It should be noted that the cockpit belt switch volume controller 12 and cockpit warning light in the present embodiment can be
Integral type (that is: the cockpit belt switch volume controller carries warning light), can also split type (i.e. cockpit belt switch sound
Amount controller 12 and cockpit warning light separate and neighbouring setting).
Further, passenger compartment 2 is equipped with the passenger compartment microphone 20 for acquiring the second audio signal in passenger compartment 2
(MIC2), for playing the passenger compartment loudspeaker 21 (SPK2) of the 4th audio signal of required reception and registration in cockpit 1, for opening
Open or close the passenger compartment belt switch volume controller 22 (VOL2) of passenger compartment microphone 20 and passenger compartment loudspeaker 21, for mentioning
Show the passenger compartment warning light of the working condition of passenger compartment microphone 20 and passenger compartment loudspeaker 21.
It should be noted that the passenger compartment belt switch volume controller 22 and passenger compartment warning light in the present embodiment can be
Integral type (that is: the passenger compartment belt switch volume controller carries warning light), can also split type (passenger compartment belt switch volume
Controller 22 and passenger compartment warning light separate and neighbouring setting).
Further, in the present embodiment, the setting of the microphone, loudspeaker, on/off switch and/or warning light
Position can carry out any setting according to the demand of user, and positions are arranged also within protection scope of the present invention in other.
So far, oneself is simply described the application environment of the two-way real time phone call intercom system of the embodiment of the present invention.In the following, will
Based on the application environment of above-mentioned two-way real time phone call intercom system, each embodiment of the invention is proposed.
Fig. 2 illustrates one embodiment of the two-way real time phone call audio-frequency processing method of the present invention.In the present embodiment, referring to
Fig. 2, the two-way real time phone call audio-frequency processing method include the following steps:
Step S1, when the second audio for receiving the first audio signal acquired in cockpit simultaneously and being acquired in passenger compartment
When signal, the 4th audio signal of broadcasting in the interior third audio signal played of acquisition cockpit and acquisition passenger compartment.
Step S2, analyzes the first audio signal and the second audio signal and whether meets default noise reduction and disappear echo condition；When
One audio signal and/or the second audio signal meet default noise reduction disappear echo condition when, execute step S3.
Step S3 carries out noise reduction to the first audio signal by third audio signal and disappears echo processing, and/or, by the
Four audio signals to the second audio believe carry out noise reduction disappear echo processing.
The present embodiment is when the second audio signal of the first audio signal and passenger compartment that receive cockpit simultaneously, acquisition
The 4th audio signal played in the third audio signal and acquisition passenger compartment played in driver's cabin, when the first audio signal and/
Or second audio signal meet default noise reduction disappear echo condition when, noise reduction is carried out to the first audio signal by third audio signal
The echo that disappears processing, and/or, by the 4th audio signal to the second audio believe carry out noise reduction disappear echo processing, therefore, reduce and drive
It sails the noise in cabin and plays influence of the echo of voice formation to the first audio signal, so as to export the clearly five notes of traditional Chinese music
Frequency signal is to passenger compartment, so that motroist knows driver's meaning to be expressed, meanwhile, reduce noise in passenger compartment and
Influence of the echo of voice formation to the second audio signal is played, is extremely driven so as to export clearly the 6th audio signal
Cabin so that driver knows motroist's meaning to be expressed, and then promotes to form effective communication between motroist and driver,
It is efficient to improve communication.
On the basis of the above embodiments, in other embodiments, referring to Fig. 3, step S3 includes:
Step S30, analyzes the first audio signal and/or the second audio signal whether there is echo.When the first audio signal
And/or second audio signal there are when echo, execute step S31.On the basis of the above embodiments, in other embodiments, step
After rapid S30, if echo is not present in the first audio signal and/or the second audio signal, step S40 is executed.
Step S31 carries out the first audio signal by third audio signal to eliminate echo processing and/or by the 4th sound
Frequency signal carries out the second audio signal to eliminate echo processing.
Step S32, echo treated audio signal is eliminated in analysis whether there is noise.When eliminating echo treated sound
Frequency signal executes step S33 there are when noise.
Step S33 carries out noise reduction process to echo treated audio signal is eliminated, and the audio after noise reduction process is believed
Number amplify processing, and the audio signal after cockpit and/or passenger compartment play enhanced processing.
Step S40, analyzes the first audio signal and/or the second audio signal whether there is noise；When the first audio signal
And/or second audio signal there are when noise, execute step S41.
Step S41 carries out noise reduction process to the first audio signal and/or the second audio signal, and will be after noise reduction process
Audio signal amplifies processing, and the audio signal after cockpit and/or passenger compartment play enhanced processing.
The audio signal that the present embodiment is first received according to currently playing Audio Signal Processing post-processes noise, passes through
This dual audio processing operation, causing that treated, audio signal is apparent, so that it is efficient further to improve communication.
It should be understood that the size of the serial number of each step is not meant that the order of the execution order in above-described embodiment, each process
Execution sequence should be determined by its function and internal logic, the implementation process without coping with the embodiment of the present application constitutes any limit
It is fixed.
Fig. 4 illustrates one embodiment of the two-way real time phone call intercom system of the present invention.In the present embodiment, referring to fig. 4,
The two-way real time phone call intercom system includes cockpit microphone 30, at least one cockpit loudspeaker 31, passenger compartment microphone
32, at least one passenger compartment loudspeaker 33 and central control box 34, central control box 34 respectively with cockpit microphone 30, drive
Cabin loudspeaker 31, passenger compartment microphone 32, passenger compartment loudspeaker 33 connect.
Wherein, cockpit microphone 30 is set in cockpit, and for acquiring the first audio signal in cockpit；Multiply
Main cabin microphone 32 is set in passenger compartment, and for acquiring the second audio signal in passenger compartment；Cockpit loudspeaker 31 is set
It is placed in cockpit, and the third audio signal for playing required reception and registration in passenger compartment；Passenger compartment loudspeaker 33, which is set to, to be multiplied
In main cabin, and the 4th audio signal for playing required reception and registration in cockpit；Central control box 34 for that ought receive simultaneously
When the first audio signal and the second audio signal, by third audio signal to the first audio signal carry out noise reduction disappear echo processing
Fifth audio signal is obtained, and fifth audio signal is exported by passenger compartment loudspeaker 33, meanwhile, pass through the 4th audio signal pair
Second audio signal carries out the noise reduction echo that disappears and handles to obtain the 6th audio signal, and passes through 31 hand of cockpit loudspeaker output the 6th
Audio signal.
The present embodiment is when the second audio signal of the first audio signal and passenger compartment that receive cockpit simultaneously, acquisition
The 4th audio signal played in the third audio signal and acquisition passenger compartment played in driver's cabin, when the first audio signal and/
Or second audio signal meet default noise reduction disappear echo condition when, noise reduction is carried out to the first audio signal by third audio signal
The echo that disappears processing, and/or, by the 4th audio signal to the second audio believe carry out noise reduction disappear echo processing, therefore, reduce and drive
It sails the noise in cabin and plays influence of the echo of voice formation to the first audio signal, so as to export the clearly five notes of traditional Chinese music
Frequency signal is to passenger compartment, so that motroist knows driver's meaning to be expressed, meanwhile, reduce noise in passenger compartment and
Influence of the echo of voice formation to the second audio signal is played, is extremely driven so as to export clearly the 6th audio signal
Cabin so that driver knows motroist's meaning to be expressed, and then promotes to form effective communication between motroist and driver,
It is efficient to improve communication.
Further, on the basis of the above embodiments, in other embodiments, referring to fig. 4, which includes
DSP 340 and noise attenuation module 341；DSP 340 respectively with cockpit microphone 30, cockpit loudspeaker 31, passenger compartment wheat
Gram wind 32, passenger compartment loudspeaker 33 connect, and noise attenuation module 341 is connect with DSP 340.
Wherein, DSP 340 is used to analyze the first audio when receiving the first audio signal and the second audio signal simultaneously
Signal and the second audio signal whether there is noise and/or echo；Noise attenuation module 341 is used for when the first audio signal or the
Three audio signals carry out noise reduction to the first audio signal by third audio signal and disappear at echo there are when noise and/or echo
Reason obtains fifth audio signal, or carries out the noise reduction echo that disappears to the second audio signal by the 4th audio signal and handle to obtain the 6th
Audio signal.
In the present embodiment, the analysis operation of audio signal is executed by DSP, and noise attentuation processing operation is by noise attentuation mould
Block 341 executes, and therefore, the analysis operation of audio signal and noise attentuation processing operation separately carry out, and in turn, DSP is without carrying out
The noise attentuation processing operation of audio signal, reduces the processing data volume of DSP, to improve the speed of response of DSP.
On the basis of the above embodiments, in other embodiments, referring to fig. 4, which is also wrapped
Include cockpit belt switch volume controller 40, passenger compartment belt switch volume controller 41 and MCU 42, MCU 42 respectively with driving
Cabin belt switch volume controller 40, passenger compartment belt switch volume controller 41, the connection of DSP 340.
Wherein, cockpit belt switch volume controller 40 is set in cockpit, and for opening or closing cockpit wheat
Gram wind 30 and cockpit loudspeaker 31；Passenger compartment belt switch volume controller 41 is set in passenger compartment, and for opening or closing
Close passenger compartment microphone 32 and passenger compartment loudspeaker 33.
In the present embodiment, when cockpit belt switch volume controller is in close state, MCU receives cockpit band
When the pressing signal of switch volume controller, cockpit microphone and cockpit loudspeaker are opened.When cockpit belt switch volume
When controller is in the open state, when MCU receives the pressing signal of cockpit belt switch volume controller, cockpit wheat is closed
Gram wind and cockpit loudspeaker.
Similarly, when passenger compartment belt switch volume controller is in close state, MCU receives passenger compartment belt switch volume
When the pressing signal of controller, passenger compartment microphone and passenger compartment loudspeaker are opened.At passenger compartment belt switch volume controller
When open state, when MCU receives the pressing signal of passenger compartment belt switch volume controller, closes passenger compartment microphone and multiply
Main cabin loudspeaker.
The present embodiment is caused by setting cockpit belt switch volume controller and/or passenger compartment belt switch volume controller
Make the communication between driver and motroist, can be started in real time according to the demand of both sides, on the one hand, is saved two-way real-time
The electricity of communicating talkback system on the other hand, can be with when driver or motroist's speech content are not desired to clearly be known by other side
By closing cockpit belt switch volume controller and/or passenger compartment belt switch volume controller, reaching protection driver or multiplying
The effect of the privacy voice of vehicle person.
Further, on the basis of the above embodiments, in other embodiments, referring to fig. 4, the two-way real time phone call intercommunication
System further includes cockpit warning light 50 and passenger compartment warning light 51, wherein MCU 42 respectively with cockpit warning light 50, multiply
Main cabin warning light 51 connects.
Wherein, cockpit warning light 50, is set in cockpit, and for prompting cockpit microphone 30 and driving
The working condition of cabin loudspeaker 31；Passenger compartment warning light 51 is set to passenger compartment, and for prompt passengers cabin microphone 32 and multiplies
The working condition of main cabin loudspeaker 33.
In the present embodiment, when cockpit warning light is bright, then cockpit microphone and cockpit loudspeaker is prompted to be in
Open state, otherwise, cockpit microphone and cockpit loudspeaker are in close state.
When passenger compartment warning light is bright, then prompt passengers cabin microphone and passenger compartment loudspeaker are in the open state, otherwise,
Then passenger compartment microphone and passenger compartment loudspeaker are in close state.
The present embodiment can quickly know the work of microphone and loudspeaker by warning light in order to driver and/or motroist
Make state, to meet the needs of user is current, to improve user experience.
Further, on the basis of the above embodiments, in other embodiments, referring to fig. 4, the two-way real time phone call intercommunication
System further includes amplifier 60, which connect with noise attenuation module 341.
Wherein, which is used for that fifth audio to be believed to disappearing echo through 341 noise reduction of institute's noise attenuation module treated
Number and/or the 6th audio signal amplify processing.
The present embodiment is by disappearing echo treated fifth audio signal and/or the 6th audio to noise attenuation module noise reduction
Signal amplifies processing, improves the volume of output audio signal, consequently facilitating driver or motroist do not hear, further mentions
It is efficient communication has been risen.
Further, on the basis of the above embodiments, in other embodiments, which is also wrapped
Include power module.Wherein, which is used to power for two-way real time phone call intercom system.
The power module of the present embodiment can be shared with the vehicle power module of automobile, can also be independent, and the two is can
The battery module of charging.When the two is independent, the two can mutually carry out charging operations.
The specific embodiment of invention is described in detail above, but it is only used as example, the present invention is not intended to limit
With specific embodiments described above.For a person skilled in the art, any equivalent modifications that the invention is carried out
Or substitute also all among scope of the invention, therefore, the made equalization in the case where not departing from the spirit and principles in the present invention range
Transformation and modification, improvement etc., all should be contained within the scope of the invention.
Claims (10)
1. a kind of two-way real time phone call audio-frequency processing method, which is characterized in that it includes the following steps:
When receiving the first audio signal acquired in cockpit and the second audio signal acquired in passenger compartment simultaneously, acquisition
The 4th audio signal played in the third audio signal and acquisition passenger compartment played in cockpit；
It analyzes first audio signal and whether second audio signal meets default noise reduction and disappear echo condition；
When first audio signal and/or the default noise reduction of second audio signal satisfaction disappear echo condition, by described
Third audio signal to first audio signal carry out noise reduction disappear echo processing, and/or, pass through the 4th audio signal pair
Second audio signal carries out noise reduction and disappears echo processing.
2. two-way real time phone call audio-frequency processing method according to claim 1, which is characterized in that pass through the third audio
Signal to first audio signal carry out noise reduction disappear echo processing, and/or, by the 4th audio signal to described second
Audio letter carry out noise reduction disappear echo processing the step of, comprising:
First audio signal and/or second audio signal are analyzed with the presence or absence of echo；
When first audio signal and/or second audio signal are there are when echo, pass through the third audio signal pair
First audio signal carry out eliminate echo processing and/or by the 4th audio signal to second audio signal into
Row eliminates echo processing；
Echo treated audio signal is eliminated in analysis whether there is noise；
When the elimination echo treated audio signal is there are when noise, to the elimination echo treated audio signal into
Row noise reduction process, and the audio signal after noise reduction process is amplified into processing, and in the cockpit and/or the passenger compartment
Audio signal after playing enhanced processing.
3. two-way real time phone call audio-frequency processing method according to claim 2, which is characterized in that analysis first audio
After the step of signal and/or second audio signal whether there is echo, further includes:
If echo is not present in first audio signal and/or second audio signal, first audio signal is analyzed
And/or second audio signal whether there is noise；
When first audio signal and/or second audio signal are there are when noise, to first audio signal and/or
Second audio signal carries out noise reduction process, and the audio signal after noise reduction process is amplified processing, and drive in described
It sails cabin and/or the passenger compartment plays the audio signal after enhanced processing.
4. a kind of two-way real time phone call intercom system, which is characterized in that it is applied to automobile, and the automobile includes cockpit and multiplies
Main cabin, the two-way real time phone call intercom system include:
Cockpit microphone is set in the cockpit, and for acquiring the first audio signal in the cockpit；
Passenger compartment microphone is set in the passenger compartment, and for acquiring the second audio signal in the passenger compartment；
At least one cockpit loudspeaker, is set in the cockpit, and for playing required reception and registration in the passenger compartment
Third audio signal；
At least one passenger compartment loudspeaker, is set in the passenger compartment, and for playing required reception and registration in the cockpit
The 4th audio signal；
Central control box, respectively with the cockpit microphone, the cockpit loudspeaker, the passenger compartment microphone, institute
The connection of passenger compartment loudspeaker is stated, when receiving first audio signal and second audio signal simultaneously, by described
Third audio signal carries out the noise reduction echo that disappears to first audio signal and handles to obtain fifth audio signal, and is multiplied by described
Main cabin loudspeaker exports the fifth audio signal, meanwhile, by the 4th audio signal to second audio signal into
The echo that disappears of row noise reduction handles to obtain the 6th audio signal, and passes through the cockpit loudspeaker hand and export the 6th audio
Signal.
5. two-way real time phone call intercom system according to claim 4, which is characterized in that the central control box includes:
DSP, respectively with the cockpit microphone, the cockpit loudspeaker, the passenger compartment microphone, the passenger compartment
Loudspeaker connection analyzes the first audio signal when receiving first audio signal and second audio signal simultaneously
It whether there is noise and/or echo with second audio signal；
Noise attenuation module, for when first audio signal or the third audio signal are there are when noise and/or echo,
The noise reduction echo that disappears is carried out to first audio signal by the third audio signal and handles to obtain fifth audio signal, or is logical
It crosses the 4th audio signal noise reduction echo that disappears is carried out to second audio signal and handle to obtain the 6th audio signal.
6. two-way real time phone call intercom system according to claim 5, which is characterized in that its further include:
Amplifier is connect with the noise attenuation module, and for after institute's noise attenuation module noise reduction disappears echo processing
The fifth audio signal and/or the 6th audio signal amplify processing.
7. two-way real time phone call intercom system according to claim 5, which is characterized in that its further include:
Cockpit belt switch volume controller, is set in the cockpit, and for opening or closing the cockpit wheat
Gram wind and the cockpit loudspeaker；
Passenger compartment belt switch volume controller, is set in the passenger compartment, and for opening or closing the passenger compartment wheat
Gram wind and the passenger compartment loudspeaker；
MCU, respectively with the cockpit belt switch volume controller, the passenger compartment belt switch volume controller, the DSP
Connection.
8. two-way real time phone call intercom system according to claim 7, which is characterized in that its further include:
Cockpit warning light is set in the cockpit, and the cockpit warning light is connect with the MCU, and for mentioning
Show the working condition of the cockpit microphone and the cockpit loudspeaker；
Passenger compartment warning light is set to the passenger compartment, and the passenger compartment warning light is connect with the MCU, and for prompting
The working condition of the passenger compartment microphone and the passenger compartment loudspeaker.
9. two-way real time phone call intercom system according to claim 4, which is characterized in that its further include:
Power module is used to power for the two-way real time phone call intercom system.
10. two-way real time phone call intercom system according to claim 4, which is characterized in that the cockpit multiplies with described
A partition is equipped between main cabin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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