CN106910510A - Vehicle-mounted power amplifying device, vehicle and its audio play handling method - Google Patents
Vehicle-mounted power amplifying device, vehicle and its audio play handling method Download PDFInfo
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
- G10L21/0208—Noise filtering
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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
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
- G10L21/0208—Noise filtering
- G10L2021/02082—Noise filtering the noise being echo, reverberation of the speech
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Abstract
The invention discloses a kind of vehicle-mounted power amplifying device, vehicle and its audio play handling method, wherein, equipment includes digital signal processor, speech processing module and codec；Digital signal processor carries out audio optimization processing to the first audio signal that control device sends, and obtains the second audio signal and is sent to codec；And the audio digital signals that codec sends are transmitted to control device；Codec the second audio signal is carried out digital-to-analogue conversion for simulated audio signal will pass through player plays；And digital signal processor is sent to for audio digital signals to the voice signal analog-to-digital conversion that speech processing module sends；Speech processing module obtains echo reference signal from simulated audio signal, echo cancellation process is carried out using the echo signal in the mixing voice signal that echo reference signal sends to sound collection equipment, the voice signal in mixing voice signal is obtained and is sent to codec.The present invention realizes the effective suppression and elimination to echo.
Description
Technical field
The present invention relates to vehicle technology, especially a kind of vehicle-mounted power amplifying device, vehicle and its audio play handling method.
Background technology
At present, vehicle audio has turned into automotive infotainment important component, and user improves to tonequality requirement, needs
The quantity of the loudspeaker to be supported is more and more, thus producer increases independent external power amplifier main frame on vehicle mostly.Meanwhile,
Vehicle-mounted voice identification also turns into the important application of vehicle man machine's interaction, for example, by vehicle-mounted voice identifying user to vehicle audio
Phonetic control command, or the voice signal that user is sent by car phone.
If while user sends voice signal, vehicle audio is playing out music or voice call, then
Due to the presence of signal reflex approach so that echo interference is inevitable.Based on echo Producing reason, echo can be distinguished
It is acoustic echo (Acoustic Echo) and line echo (Line Echo).Wherein, acoustic echo refers to be broadcasted by loudspeaker
Sound by the caused echo of microphone pickup.Acoustic echo includes direct echo and indirect echo.Wherein, direct echo is
Echo as caused by the sound of loudspeaker broadcast is directly entered microphone；Indirect echo is the sound broadcasted by loudspeaker, warp
Cross after different propagation paths (such as vehicle interior or in-car any object) reflect through one or many and drawn into microphone
The echo set for rising.What is received due to microphone is mixing voice signal that voice signal has been superimposed after echo signal, echo
Channel transfers back to loudspeaker and is heard by talker after postponing, and so as to the audio to end of talking is interfered, reduces audio
Definition, have impact on voice communication quality.
In the vehicle of prior art, car machine system is provided with (also referred to as：Middle control main frame) and power amplifier main frame, in middle control main frame
Middle setting speech processing module, the central control unit (CPU) therefrom controlled by speech processing module in main frame is sent to power amplifier master
Echo reference signal is directly extracted in the audio signal of machine, based on the mixing sound that the echo reference signal is received to microphone
Signal carries out echo cancellor (Echo Cancellation, EC), to obtain clean audio signal and be sent to power amplifier main frame,
Played by loudspeaker after carrying out audio optimization processing by power amplifier main frame.
Realize it is of the invention during, inventor has found that above-mentioned prior art at least has problems with：
Because the audio signal that power amplifier main machine centering control main frame sends has carried out audio optimization processing, can be to former audio signal
Generate Nonlinear Processing result, the echo of microphone pickup be original audio signal by the sound after Nonlinear Processing,
The echo reference signal directly extracted in the audio signal that main frame sends therefrom then is controlled by speech processing module, just cannot be to mixed
In conjunction voice signal effectively suppression and elimination are carried out by the echo produced after Nonlinear Processing.
The content of the invention
An embodiment of the present invention technical problem to be solved is：A kind of vehicle-mounted power amplifying device, vehicle and its sound are provided
Frequency play handling method, effectively to eliminate echo.
One side according to embodiments of the present invention, there is provided a kind of vehicle-mounted power amplifying device, including digital signal processor,
Speech processing module and codec；Wherein：
The digital signal processor, the first audio signal that the control device of vehicle where for receiving sends, and it is right
First audio signal carries out audio optimization processing, obtains the second audio signal and is sent to the codec；And will
The audio digital signals that the codec sends are transmitted to the control device；
The codec, for carrying out digital-to-analogue conversion to second audio signal, second audio signal is turned
Simulated audio signal is changed to will pass through player plays；And mould is carried out to the voice signal that the speech processing module sends
Number conversion, is converted to the voice signal audio digital signals and is sent to the digital signal processor；
The speech processing module, for obtaining echo reference signal from the simulated audio signal；And receive sound
The mixing voice signal that collecting device sends, voice signal and the player that the mixing voice signal sends including user
The sound of the simulated audio signal generation is played by the caused echo signal of sound collection equipment pickup；Using described
Echo reference signal carries out echo cancellation process to the echo signal in the mixing voice signal, obtains the compound voice message
Voice signal in number is simultaneously sent to the codec.
Alternatively, in above-mentioned vehicle-mounted power amplifying device embodiment, the digital signal processor is to first audio signal
When carrying out audio optimization processing, specifically include carries out following any one or more treatment to first audio signal：It is upper mixed
Sound treatment, delay process, equilibrium treatment, dynamic range control treatment.
Alternatively, in above-mentioned vehicle-mounted power amplifying device embodiment, the speech processing module is obtained from the simulated audio signal
When fetching acoustic reference signal, specifically for：
The simulated audio signal is directly extracted for echo reference signal；Or
Predetermined linear treatment is carried out to the simulated audio signal, echo reference signal is obtained.
Alternatively, in above-mentioned vehicle-mounted power amplifying device embodiment, the speech processing module utilizes the echo reference signal
When carrying out echo cancellation process to the echo signal in the mixing voice signal, specifically for：
Using echo transfer function, echo cancellation signal is obtained by the echo reference signal；And
Echo cancellation process is carried out to the mixing voice signal using the echo cancellation signal, the voice letter is obtained
Number.
Alternatively, in above-mentioned vehicle-mounted power amplifying device embodiment, when the player is for multiple, the speech processing module,
The space propagation distance to the sound collection equipment according to multiple players is additionally operable to, to being simulated described in multiple player plays
The sound that audio signal is produced carries out delay disposal respectively by the caused multichannel echo signal of sound collection equipment pickup,
With the multichannel echo signal that multiple players that align cause respectively.
Alternatively, in above-mentioned vehicle-mounted power amplifying device embodiment, the speech processing module is additionally operable to being obtained after echo cancellor
The voice signal for obtaining carries out noise reduction process；And/or
The vehicle-mounted power amplifying device also includes：
Power amplifier, for carrying out power amplification to the simulated audio signal that the codec is exported, and by power
Simulated audio signal after amplification is sent to player and plays out.
Alternatively, in above-mentioned vehicle-mounted power amplifying device embodiment, first audio signal includes multimedia business
Playing audio signal；The voice signal includes the phonetic control command for playing out control to multimedia business；
Or
First audio signal includes the audio signal of talk business；The voice signal is included in the talk business
Ascending voice signal or the phonetic control command for being controlled to the talk business that user sends.
Other side according to embodiments of the present invention, there is provided a kind of vehicle, including：Control device, sound collection sets
It is standby, the vehicle-mounted power amplifying device described in player and any of the above-described embodiment.
Alternatively, in above-mentioned vehicle embodiments, the control device, for recognizing current business model, the business
Tupe includes multimedia business or talk business；And
If current business model is multimedia business, recognize that the Voice command that the vehicle-mounted power amplifying device sends refers to
Order, corresponding control message and the microprocessor being sent in the vehicle-mounted power amplifying device are generated based on the phonetic control command
Device, so that the microprocessor is based on the broadcasting that the control message controls multimedia business；
If current business model is communication service, the ascending voice signal that the vehicle-mounted power amplifying device sends is carried out
Row transmission processe.
Another aspect according to embodiments of the present invention, there is provided a kind of vehicle audio play handling method method, institute
Stating vehicle includes control device and vehicle-mounted power amplifying device；Methods described includes：
Digital signal processor in vehicle-mounted power amplifying device receives the first audio signal that control device sends, and to described
First audio signal carries out audio optimization processing, obtains the second audio signal and the volume solution being sent in the vehicle-mounted power amplifying device
Code device；
Codec carries out digital-to-analogue conversion to second audio signal, and second audio signal is converted into analog audio
Frequency signal, and by player plays；
Speech processing module in vehicle-mounted power amplifying device obtains echo reference signal from the simulated audio signal；
Speech processing module receives the mixing voice signal that sound collection equipment sends, and the mixing voice signal includes using
The sound that the voice signal and simulated audio signal described in the player plays that family sends are produced is by the sound collection equipment
The caused echo signal of pickup；
Speech processing module is returned using the echo reference signal to the echo signal in the mixing voice signal
Sound Processing for removing, obtains the voice signal in the mixing voice signal and is sent to the codec；
The codec carries out analog-to-digital conversion to the voice signal that the speech processing module sends, by voice letter
Number be converted to audio digital signals and be sent to the digital signal processor；
The audio digital signals that the codec sends are transmitted to the control device by the digital signal processor.
Alternatively, in above method embodiment, audio optimization processing is carried out to first audio signal, including：
Following any one or more treatment is carried out to first audio signal：Upper stereo process, delay process is balanced
Treatment, dynamic range control treatment.
Alternatively, in above method embodiment, echo reference signal is obtained from the simulated audio signal, including：
The simulated audio signal is directly extracted for echo reference signal；Or
Predetermined linear treatment is carried out to the simulated audio signal, echo reference signal is obtained.
Alternatively, in above method embodiment, using the echo reference signal to it is described mixing voice signal in return
Acoustical signal carries out echo cancellation process, including：
Using echo transfer function, echo cancellation signal is obtained by the echo reference signal；
Echo cancellation process is carried out to the mixing voice signal using the echo cancellation signal, the voice letter is obtained
Number.
Alternatively, in above method embodiment, when the player is for multiple, using the echo reference signal to described
Before echo signal in mixing voice signal carries out echo cancellation process, also include：
The speech processing module according to the space propagation distance of multiple players to the sound collection equipment, to multiple
The sound that simulated audio signal described in player plays is produced is by the caused multichannel echo letter of sound collection equipment pickup
Number delay disposal is carried out respectively, with the multichannel echo signal that multiple players that align cause respectively.
Alternatively, in above method embodiment, also include：Voice of the speech processing module to acquisition after echo cancellor
Signal carries out noise reduction process；
And/or
It is described by player plays, also include：
Power amplifier in vehicle-mounted power amplifying device carries out power and puts to the simulated audio signal that the codec is exported
Greatly, the simulated audio signal after power amplification is sent into player to play out.
Alternatively, in above method embodiment, first audio signal includes the broadcasting audio of multimedia business
Signal；The voice signal includes the phonetic control command for playing out control to multimedia business；Or
First audio signal includes the audio signal of talk business；The voice signal is included in the talk business
Ascending voice signal or the phonetic control command for being controlled to the talk business that user sends.
Alternatively, in above method embodiment, by the codec send audio digital signals be transmitted to it is described in
After control equipment, also include：
The control device recognizes current business model, the service processing mode include multimedia business or
Talk business；
If current business model is multimedia business, recognize that the Voice command that the vehicle-mounted power amplifying device sends refers to
Order, corresponding control message and the microprocessor being sent in the vehicle-mounted power amplifying device are generated based on the phonetic control command
Device, so that the microprocessor is based on the broadcasting that the control message controls multimedia business；
If current business model is communication service, the ascending voice signal that the vehicle-mounted power amplifying device sends is carried out
Row transmission processe.
Vehicle-mounted power amplifying device, vehicle and its audio play handling method provided based on the above embodiment of the present invention, in car
Speech processing module is set in load power amplifying device, is entered from audio optimization processing, codec is carried out by digital signal processor
The simulated audio signal that row analog-to-digital conversion process is obtained obtains echo reference signal, using the echo reference signal to sound collection
Echo signal in the mixing voice signal that equipment sends carries out echo cancellation process, obtains the voice letter in mixing voice signal
Number, the voice signal is converted into audio digital signals it is transmitted to control device and is processed.In the embodiment of the present invention, due to returning
Acoustic reference signal and echo signal carry out identical audio optimization processing by digital signal processor, therefore, utilization this time
Echo cancellation process of the acoustic reference signal to echo signal in mixing voice signal, it will relatively cleaner and thorough, so as to realize
Effective suppression and elimination to echo, effectively prevent echo to playing the interference of audio, improves audio and plays definition
With voice communication quality, the phonetic recognization rate of music scene is improve, the echo for improving voice call scene suppresses effect
Really, significant increase Consumer's Experience；Further, since power amplifying device is integrated with speech processing module so that power amplifying device turns into one
Individual independent audio system, optimizes the module assignment on vehicle so that the audio correlation module collection such as voice call, music
In power amplifying device realize, make the upstream tones data in talk business, the downstream tones data in music business unify
After power amplifying device completion treatment, then interacted between middle control main frame, it is achieved thereby that between audio system and middle control main frame
Decoupling, be easy to the modularized design of system and the standalone upgrade of each module.
Below by drawings and Examples, technical scheme is described in further detail.
Brief description of the drawings
The Description of Drawings embodiments of the invention of a part for specification are constituted, and together with description for explaining
Principle of the invention.
Referring to the drawings, according to following detailed description, the present invention can be more clearly understood from, wherein：
Fig. 1 is the structural representation of vehicle-mounted power amplifying device one embodiment of the invention.
Fig. 2 is the structural representation of vehicle-mounted another embodiment of power amplifying device of the invention.
Fig. 3 is the structural representation of vehicle one embodiment of the present invention.
Fig. 4 is one structural representation of Application Example of vehicle of the present invention.
Fig. 5 is the flow chart of audio play handling method one embodiment of vehicle of the present invention.
Fig. 6 is the flow chart of another embodiment of the audio play handling method of vehicle of the present invention.
Specific embodiment
Describe various exemplary embodiments of the invention in detail now with reference to accompanying drawing.It should be noted that：Unless had in addition
Body illustrates that the part and the positioned opposite of step, numerical expression and numerical value for otherwise illustrating in these embodiments do not limit this
The scope of invention.
Simultaneously, it should be appreciated that for the ease of description, the size of the various pieces shown in accompanying drawing is not according to reality
Proportionate relationship draw.
The description only actually at least one exemplary embodiment is illustrative below, never as to the present invention
And its any limitation applied or use.
May be not discussed in detail for technology, method and apparatus known to person of ordinary skill in the relevant, but suitable
In the case of, the technology, method and apparatus should be considered as a part for specification.
It should be noted that：Similar label and letter represents similar terms in following accompanying drawing, therefore, once a certain Xiang Yi
It is defined in individual accompanying drawing, then it need not be further discussed in subsequent accompanying drawing.
The embodiment of the present invention can apply to computer system/server, and it can be with numerous other universal or special calculating
System environments or configuration are operated together.It is suitable to the well-known computing system, the ring that are used together with computer system/server
The example of border and/or configuration is included but is not limited to：Personal computer system, server computer system, thin client, thick client
Machine, hand-held or laptop devices, the system based on microprocessor, Set Top Box, programmable consumer electronics, NetPC Network PC,
Little types Ji calculates machine Xi Tong ﹑ large computer systems and the distributed cloud computing technology environment including any of the above described system, etc..
Computer system/server can be in computer system executable instruction (the such as journey performed by computer system
Sequence module) general linguistic context under describe.Generally, program module can include routine, program, target program, component, logic, number
According to structure etc., they perform specific task or realize specific abstract data type.Computer system/server can be with
Implement in distributed cloud computing environment, in distributed cloud computing environment, task is by by the long-range of communication network links
What reason equipment was performed.In distributed cloud computing environment, program module may be located at the Local or Remote meter including storage device
On calculation system storage medium.
Fig. 1 is the structural representation of vehicle-mounted power amplifying device one embodiment of the invention.As shown in figure 1, the car of the embodiment
Carrying power amplifying device includes digital signal processor (DSP), speech processing module and codec (Codec).Wherein：
Digital signal processor, the first sound that the control device for receiving vehicle where the digital signal processor sends
Frequency signal, and audio optimization processing is carried out to first audio signal, obtain the second audio signal and be sent to codec；With
And the audio digital signals that codec sends are transmitted to control device.
First audio signal therein is digital audio and video signals.
Codec, for carrying out digital-to-analogue conversion to above-mentioned second audio signal, simulation is converted to by the second audio signal
Audio signal is will pass through player plays；And analog-to-digital conversion is carried out to the voice signal that speech processing module sends, by language
Message number is converted to audio digital signals and is sent to digital signal processor.
Player therein for example can be loudspeaker, and the quantity of player can be one, or be located at respectively
Multiple players of diverse location on vehicle.
Speech processing module, for obtaining echo reference signal from simulated audio signal；And receive sound collection equipment
The mixing voice signal of transmission, voice signal and player plays analogue audio frequency letter that the mixing voice signal sends including user
Number sound for producing is by the caused echo signal of sound collection equipment pickup；And using echo reference signal to mixing sound
Echo signal in signal carries out echo cancellation process, obtains the voice signal in mixing voice signal and is sent to encoding and decoding
Device.
Sound collection equipment in various embodiments of the present invention for example can be microphone.
Further optionally, speech processing module can also be used to carry out at noise reduction the voice signal obtained after echo cancellor
Reason, i.e.,：Ambient noise of being powered in the mixing voice signal sent to sound collection equipment suppresses.
Based on the vehicle-mounted power amplifying device that the above embodiment of the present invention is provided, speech processes mould is set in vehicle-mounted power amplifying device
Block, the analog audio that analog-to-digital conversion process is obtained is carried out from audio optimization processing, codec is carried out by digital signal processor
Frequency signal acquisition echo reference signal, using in the mixing voice signal that the echo reference signal sends to sound collection equipment
Echo signal carries out echo cancellation process, obtains the voice signal in mixing voice signal, and the voice signal is converted into numeral
Voice signal is transmitted to control device and is processed.In the embodiment of the present invention, because echo reference signal and echo signal are passed through
Crossing digital signal processor carries out identical audio optimization processing, therefore, using the echo reference signal to mixing voice signal
The echo cancellation process of middle echo signal, it will relatively cleaner and thorough, it is achieved thereby that effective suppression and elimination to echo,
Echo be effectively prevent to playing the interference of audio, audio is improve and played definition and voice communication quality, improve music
The phonetic recognization rate of scene is played, improve the echo inhibition of voice call scene, significant increase Consumer's Experience；Separately
Outward, because power amplifying device is integrated with speech processing module so that power amplifying device turns into an independent audio system, optimizes car
Module assignment on so that the audio correlation module such as voice call, music concentrates on power amplifying device realization, makes call industry
After the downstream tones data in upstream tones data, music business in business are unified in power amplifying device completion treatment, then with
Interacted between middle control main frame, it is achieved thereby that the decoupling between audio system and middle control main frame, is easy to the modularization of system to set
The standalone upgrade of meter and each module.
Used as a specific example of the above embodiment of the present invention, digital signal processor is carried out to the first audio signal
Audio optimization processing, specifically including but not limited to can carry out following any one to the first audio signal according to the actual requirements
Or multinomial treatment：Upper audio mixing (Up mix) treatment, time delay (Delay) treatment, balanced (Equalizer) treatment, dynamic range control
System (DRC) treatment.
Wherein：
Upper stereo process, i.e.,：First audio signal is resolved into multichannel audio number by the quantity according to vehicle upper speaker
According to can specifically be realized by upper stereo process submodule.
Delay process, i.e.,：According to the distance of each loudspeaker position on vehicle, it is appropriate that each channel audio data is carried out
Delay process, so that each channel audio data can simultaneously reach corresponding loudspeaker, realizes synchronous broadcasting, can specifically pass through
Delay process submodule is realized.
Equilibrium treatment：I.e.：Each channel audio data is carried out by the influence of resonance and reflection according to vehicle interior sound field
Equilibrium treatment, the yield value of each frequency band signals is adjusted by equilibrium treatment, can specifically be realized by equilibrium treatment submodule.
Dynamic range control treatment, i.e.,：The dynamic range of input audio signal is mapped to the dynamic range specified, specifically
Submodule can be processed by dynamic range control to realize.Dynamic range generally after mapping is less than the dynamic range before mapping,
Therefore also referred to as dynamic range compression.Audio signal can carry out overall dynamic range control, it is also possible to be divided into some sons
Band, and dynamic range control is carried out respectively to each subband.
Used as another specific example of the various embodiments described above of the present invention, speech processing module is obtained from simulated audio signal
During echo reference signal, the simulated audio signal that specifically can directly extract codec output is echo reference signal；Or,
Predetermined linear treatment, such as enhanced processing etc. can also be carried out to the simulated audio signal of codec output, obtain echo ginseng
Examine signal.The present embodiment is not particularly limited to this.
In another specific example of the above embodiment of the present invention, speech processing module is using echo reference signal to mixed
When echo signal in conjunction voice signal carries out echo cancellation process, specifically for：Using echo transfer function, referred to by echo
Signal acquisition echo cancellation signal, such as Echo=H (Echo ref), wherein H are echo transfer function, and Echo ref are echo
Reference signal, Echo is echo cancellation signal；And mixing voice signal is carried out at echo cancellor using echo cancellation signal
Reason, obtains voice signal.
Echo transfer function represents the sound of player plays, and by space, (sound of such as player plays is in vehicle
The surface such as wall, barrier multiple reflections) transfer function of sound collection equipment is delivered to, each player exists with sound collection equipment
The locus of vehicle interior does not change, then echo transfer function is substantially stationary, can be in advance by speech processing module
It is obtained ahead of time, for example, can be solved by using methods such as adaptive algorithm, sef-adapting filter principles obtaining.By adaptive
Algorithm is answered to obtain echo transfer function, even if each player is small in the locus generation of vehicle interior with sound collection equipment
Change, it is also possible to quickly adjust echo transfer function.
For example, number can be obtained by sliding-model control according to the transfer function H (s) of player to sound collection equipment
Word domain transfer function H (z), then impulse Response Function h (n) is obtained by numeric field transfer function H (z), then, by shock response letter
Number h (n) obtains echo transfer function H by Fourier transformation.
In a particular application, when the quantity of player is for multiple on vehicle, multiple player plays simulated audio signals
The sound of generation can cause multichannel echo signal by sound collection equipment pickup, then in another reality of vehicle-mounted power amplifying device of the invention
Apply in example, speech processing module can be also used for the space propagation distance according to multiple players to sound collection equipment, to many
The corresponding multichannel echo signal of individual player carries out delay disposal respectively, with the multichannel echo that multiple players that align cause respectively
Signal.
Fig. 2 is the structural representation of vehicle-mounted another embodiment of power amplifying device of the invention.As shown in Fig. 2 with shown in Fig. 1
Embodiment is compared, and the vehicle-mounted power amplifying device of the embodiment also includes power amplifier (PA), for the mould exported to codec
Intending audio signal carries out power amplification, and the simulated audio signal after power amplification is sent into player plays out.
Used as a concrete application of each vehicle-mounted power amplifying device embodiment of the present invention, the first audio signal therein specifically may be used
Being the playing audio signal of multimedia business；Accordingly, voice signal is for being broadcast to multimedia business
Put the phonetic control command of control.
In addition, in another concrete application of each vehicle-mounted power amplifying device embodiment of the present invention, the first audio signal is specific
It can also be the audio signal of talk business；Accordingly, voice signal includes the ascending voice letter of user's transmission in talk business
Number or the phonetic control command for being controlled to talk business.
In addition, referring back to Fig. 2, in the another embodiment of vehicle-mounted power amplifying device of the invention, microcontroller can also be included
And power supply (Power) module (MCU).Wherein, microcontroller is used for the control message according to CPU transmissions in control device to vehicle-mounted
Power amplifying device is controlled accordingly, for example, to digital signal processor, speech processing module, codec power amplifier
Running parameter configured, updated, the broadcasting to simulated audio signal is controlled, such as commence play out, stop play, heighten
Volume, reduction volume, fast-forward play etc..Each module during power module is used for vehicle-mounted power amplifying device is powered.In addition, this
The vehicle-mounted power amplifying device of inventive embodiments can also according to the actual requirements set other modules.
Fig. 3 is the structural representation of vehicle one embodiment of the present invention.As shown in figure 3, the vehicle bag of the embodiment of the present invention
Include：Control device, sound collection equipment, player and vehicle-mounted power amplifying device.Vehicle-mounted power amplifying device therein can specifically be used
The vehicle-mounted power amplifying device structure of any of the above-described embodiment of the present invention is realized.The detailed description of power amplifying device may refer to above-mentioned Fig. 1
The related content of the vehicle-mounted power amplifying device that~Fig. 2 any embodiments are provided, here is omitted.
Based on the above embodiment of the present invention provide vehicle, including the various embodiments described above vehicle-mounted power amplifying device, to mixing
The echo cancellation process of echo signal is relatively cleaner and thorough in voice signal, realizes the effective suppression and elimination to echo,
Echo be effectively prevent to playing the interference of audio, audio is improve and played definition and voice communication quality, improve music
The phonetic recognization rate of scene is played, improve the echo inhibition of voice call scene, significant increase Consumer's Experience；Separately
Outward, the module assignment on vehicle is optimized so that the audio correlation module such as voice call, music concentrates on power amplifying device reality
It is existing, the upstream tones data in talk business, the downstream tones data in music business is unified in power amplifying device and complete
After treatment, then interacted between middle control main frame, realize the decoupling between audio system and middle control main frame, be easy to the mould of system
Blockization designs the standalone upgrade with each module.
In addition, in the vehicle of above-described embodiment, control device is used for：The current business model of identification, service processing mode
Including multimedia business or talk business；And if current business model is multimedia business, is recognized vehicle-mounted
The phonetic control command that power amplifying device sends, generates corresponding control message and is sent to vehicle-mounted power amplifier based on phonetic control command
Microprocessor in equipment, so that microprocessor is based on the broadcasting that control message controls multimedia business；If current industry
Business pattern is communication service, and up transmission processe is carried out to the ascending voice signal that vehicle-mounted power amplifying device sends.
Fig. 4 is one structural representation of Application Example of vehicle of the present invention.As shown in figure 4, the vehicle can include：In
Control equipment, vehicle-mounted power amplifying device, instrument board, drive recorder, HUD (Head Up Display, head-up display) come back and show
Device, intelligent vehicle-carried information entertainment, intelligent driving module.
Instrument board has 12.3 cun of LCD display devices, and the instrument board can be using the J6CPU of TI；The operation system of instrument board
System can be based on QNX embedded systems, and instrument board is displayed for vehicle-state, map, vehicle navigation information, vehicle and plays
Music etc., the car status information is including speed, rotating speed, electricity, tire pressure, vehicle parking, gear etc..HUD HUDs
GPS navigation information, navigation route information, temporal information etc. can be shown.
In one embodiment, intelligent driving module can be used for the treatment operation related to intelligent driving, intelligent driving
Module can include senior DAS (Driver Assistant System) (Advanced Driver Assistance Systems, ADAS), actively pacify
Total system, notice accessory system (Attention Assist System, AAS), tired warning system (Fatigue
Warning System, FWS), Vehicular intelligent acoustical alarm system (Acoustic Vehicle Alerting System,
AVAS) etc..Vehicle can combine ADAS etc. and carry out intelligent driving, and the intelligent driving can be nobody driving complete, it is also possible to
It is that driver carries out the senior auxiliary driving function such as auxiliary doubling, the lane shift of Driving control.
Control device can be made up of multiple modules, can mainly include：CPU；Mainboard；SATA(Serial Advanced
Technology Attachment, Serial Advanced Technology Attachment) module, the storage device such as SSD is connected to, can be used to deposit
Storage data message；WIFI (Wireless-Fidelity, Wireless Fidelity)/Bluetooth modules, for vehicle provides WIFI/
The service of Bluetooth；LTE (Long Term Evolution, Long Term Evolution) communication module, for vehicle is provided and telecommunications fortune
Seek the communication function of business；Power module, power module provides power supply for the control device；Switch interconnecting modules, the Switch
Interconnecting module can connect multiple sensors as a kind of expansible interface, such as if necessary to addition night vision function sensing
Device, PM2.5 function sensors, can be connected to the mainboard of control device, so as to control device by the Switch interconnecting modules
Processor carry out data processing, and transfer data to middle control display.
Vehicle-mounted power amplifying device can also include AM (Amplitude in addition to the composition module of the above embodiment of the present invention
Modulation, amplitude modulation)/FM (Frequency Modulation, frequency modulation) module, the function of radio is provided for vehicle.
In one embodiment, the vehicle also includes looking around camera, ADAS cameras, night vision cam, millimeter wave thunder
Up to, the sensor such as ultrasonic radar, ESR radars.Vehicle hardware is after manufacture the above-mentioned intelligent driving related hardware of carry, later stage
Can be upgraded by OTA and improve automatic Pilot correlation function using above-mentioned hardware.
Fig. 5 is the flow chart of audio play handling method one embodiment of vehicle of the present invention.The audio of the embodiment is broadcast
Putting processing method can be realized by the vehicle-mounted power amplifying device of any of the above-described embodiment of the invention or vehicle, vehicle bag therein
Include control device and vehicle-mounted power amplifying device；Vehicle-mounted power amplifying device includes digital signal processor, speech processing module and encoding and decoding
Device, further can also exemplarily include power amplifier.As shown in figure 5, the audio play handling method bag of the embodiment
Include：
100, digital signal processor receives the first audio signal that control device sends, and first audio signal is entered
Row audio optimization processing, obtains the second audio signal and the codec being sent in vehicle-mounted power amplifying device.
Wherein, audio optimization processing is carried out to first audio signal, for example can be the first audio signal is carried out with
Under any one or more treatment：Upper stereo process, delay process, equilibrium treatment, dynamic range control treatment.
110, codec carries out digital-to-analogue conversion to the second audio signal, and second audio signal is converted into analogue audio frequency
Signal, and by player plays.
Specifically, simulated audio signal directly can be sent to codec the player on vehicle, be entered by player
Row is played, it is also possible to which simulated audio signal is sent into the power amplifier in vehicle-mounted power amplifying device, by power amplifier to compiling
The simulated audio signal of decoder output carries out power amplification, and the simulated audio signal after power amplification then is sent into broadcasting
Device is played out.
120, the simulated audio signal that speech processing module is exported from codec obtains echo reference signal.
Specifically, the simulated audio signal that speech processing module can directly extract codec output is echo with reference to letter
Number；Or, it is also possible to the simulated audio signal to codec output carries out predetermined linear treatment, such as enhanced processing etc., obtains
Obtain echo reference signal.
130, speech processing module receives the mixing voice signal that sound collection equipment sends, and the mixing voice signal includes
The sound that the above-mentioned simulated audio signal of voice signal and player plays that user sends is produced picks up institute by sound collection equipment
The echo signal for causing.
140, speech processing module is returned using echo reference signal to the echo signal in above-mentioned mixing voice signal
Sound Processing for removing, obtains the voice signal in mixing voice signal and is sent to codec.
Specifically, speech processing module can utilize echo transfer function, and obtaining echo cancellor by echo reference signal believes
Number, echo cancellation process then is carried out to mixing voice signal using echo cancellation signal, obtain voice signal.
In addition, speech processing module can also carry out noise reduction process to the voice signal obtained after echo cancellor, to voice
Ambient noise in signal is suppressed.
150, codec carries out analog-to-digital conversion to the voice signal that speech processing module sends, and converts voice signals into
Audio digital signals are simultaneously sent to digital signal processor.
160, the audio digital signals that codec sends are transmitted to control device by digital signal processor.
Based on the audio play handling method that the above embodiment of the present invention is provided, set at voice in vehicle-mounted power amplifying device
Reason module, the mould that analog-to-digital conversion process is obtained is carried out from audio optimization processing, codec is carried out by digital signal processor
Intend audio signal and obtain echo reference signal, the mixing voice signal sent to sound collection equipment using the echo reference signal
In echo signal carry out echo cancellation process, obtain the voice signal in mixing voice signal, the voice signal is converted to
Audio digital signals are transmitted to control device and are processed.In the embodiment of the present invention, due to echo reference signal and echo signal
Identical audio optimization processing is carried out by digital signal processor, therefore, using the echo reference signal to mixing sound
The echo cancellation process of echo signal in signal, it will relatively clean and thoroughly, it is achieved thereby that effective suppression to echo and
Eliminate, effectively prevent echo to playing the interference of audio, improve audio and play definition and voice communication quality, improve
The phonetic recognization rate of music scene, improve the echo inhibition of voice call scene, significant increase Consumer's Experience；
Further, since power amplifying device is integrated with speech processing module so that power amplifying device turns into an independent audio system, optimizes
Module assignment on vehicle so that the audio correlation module such as voice call, music concentrates on power amplifying device realization, makes call
After the downstream tones data in upstream tones data, music business in business are unified in power amplifying device completion treatment, then
Interacted between middle control main frame, it is achieved thereby that the decoupling between audio system and middle control main frame, is easy to the modularization of system
Design and the standalone upgrade of each module.
In addition, the player on vehicle for example can be loudspeaker, the quantity of player can be one, or divide
Not Wei Yu on vehicle diverse location multiple players.In another embodiment of the audio play handling method of vehicle of the present invention
In, when player is for multiple, before operation 140, can also carry out following operation：
Speech processing module is broadcast according to the space propagation distance of multiple players to sound collection equipment to multiple players
The sound for putting simulated audio signal generation is carried out at delay respectively by the caused multichannel echo signal of sound collection equipment pickup
Reason, with the multichannel echo signal that multiple players that align cause respectively, eliminates to carry out unified echo signal.
Used as a concrete application of the above-mentioned each audio play handling method embodiment of the present invention, the first audio signal is specific
It can be the playing audio signal of multimedia business；Accordingly, voice signal is particularly for multimedia business
Play out the phonetic control command of control.
As another concrete application of the above-mentioned each audio play handling method embodiment of the present invention, the first audio signal tool
Body can also be the audio signal of talk business；Accordingly, voice signal includes the ascending voice of user's transmission in talk business
Signal or the phonetic control command for being controlled to talk business.
Fig. 6 is the flow chart of another embodiment of the audio play handling method of vehicle of the present invention.As shown in fig. 6, and Fig. 5
Shown embodiment is compared, and the embodiment can also include after the flow of embodiment illustrated in fig. 5：
200, control device recognizes current business model, and wherein service processing mode can for example be included but is not limited to：
Multimedia business or talk business.
210, if current business model is multimedia business, control device recognizes the language that vehicle-mounted power amplifying device sends
Sound control instruction, corresponding control message and the microprocessor being sent in vehicle-mounted power amplifying device are generated based on the phonetic control command
Device, so that microprocessor is based on the broadcasting that the control message controls multimedia business.
Afterwards, the follow-up process of the present embodiment is not performed.
220, if current business model is communication service, the ascending voice signal that vehicle-mounted power amplifying device sends is carried out
Row transmission processe.
Application of the embodiment of the present invention in multimedia business and voice calling service the two scenes separately below
As a example by, the technical scheme to the embodiment of the present invention is further described.
Scene one：The application scenarios of multimedia business
Control device is decoded to the audio files of multimedia service, obtains digital audio and video signals (i.e.：Above-described embodiment
In the first audio signal), into after CPU, vehicle-mounted power amplifying device is sent to by cable by CPU；
After vehicle-mounted power amplifying device receives digital audio and video signals, the digital audio and video signals are carried out by digital signal processor
Audio optimization treatment.Specifically, digital signal processor can be according to the quantity of vehicle upper speaker to digital audio and video signals
Stereo process is carried out, to resolve into multichannel audb data；Then, according to the distance of each loudspeaker position on vehicle, to every
Individual channel audio data carry out appropriate delay process, so that each channel audio data can simultaneously reach corresponding loudspeaker；
Then, equilibrium treatment can be carried out to each channel audio data according to the resonance of vehicle interior sound field and the influence of reflection, is adjusted
The yield value of whole each frequency band signals；Finally, then carry out dynamic range control treatment, the dynamic range of input audio signal is mapped
To the dynamic range specified, obtain the second audio signal and be sent to codec；
Codec carries out digital-to-analogue conversion to the second audio signal, obtains simulated audio signal, and the simulated audio signal is same
When ingoing power amplifier and speech processing module, speech processing module obtains echo with reference to letter according to the simulated audio signal
Number；
Power amplifier carries out the direct drive loudspeaker of the output signal after power amplification to simulated audio signal and broadcasts
Put, now, can hear that loudspeaker plays the sound of music, loudspeaker plays the sound of music also into sound collection equipment
Such as microphone；
Assuming that now user have issued voice signal, such as to the phonetic control command of music, then loudspeaker is broadcast
The voice signal that the sound and user put the music on send is while enter sound collection equipment, now, sound collection equipment is gathered
Mixing voice signal, wherein both including voice signal, and play music comprising loudspeaker institute picked up by sound collection equipment
The echo signal of generation, the mixing voice signal that speech processing module is gathered using echo reference signal to sound collection equipment
Echo cancellation process is carried out, noise reduction process is carried out to the voice signal obtained after echo cancellor afterwards, voice signal hair will be obtained
Give codec；
Codec is sent to Digital Signal Processing after carrying out analog-to-digital conversion to the voice signal that speech processing module sends
Device, directly control device is transmitted to by digital signal processor by cable by digital signal processor；
After control device receives voice signal, current business model is recognized；If current business model is multimedia
Play service, control device recognizes the phonetic control command that vehicle-mounted power amplifying device sends, and phase is generated based on the phonetic control command
The control message answered and the microprocessor being sent in vehicle-mounted power amplifying device, so that microprocessor is more based on control message control
The broadcasting of media playing service；If current business model is communication service, the ascending voice letter sent to vehicle-mounted power amplifying device
Number carry out up transmission processe.
Scene two：The application scenarios of voice calling service
Control device is received after the downstream wireless signals of voice calling service, by the modulation /demodulation in control device
Device (Modem) is demodulated treatment to the downstream wireless signals, obtains digital audio and video signals (i.e.：In above-described embodiment first
Audio signal), into after CPU, vehicle-mounted power amplifying device is sent to by cable by CPU；
After vehicle-mounted power amplifying device receives digital audio and video signals, processed by digital signal processor.Specifically, by
Digital signal processor carries out audio optimization treatment to the digital audio and video signals.Specifically, digital signal processor can be with root
Upper stereo process is carried out to digital audio and video signals according to the quantity of vehicle upper speaker, to resolve into multichannel audb data；Then,
According to the distance of each loudspeaker position on vehicle, appropriate delay process is carried out to each channel audio data, so as to each sound channel
Voice data can simultaneously reach corresponding loudspeaker；Then, can according to the resonance of vehicle interior sound field and reflection influence,
Each channel audio data are carried out with equilibrium treatment, the yield value of each frequency band signals is adjusted；Finally, then dynamic range control is carried out
Treatment, the dynamic range of input audio signal is mapped to the dynamic range specified, and is obtained the second audio signal and is sent to volume
Decoder；
Codec carries out digital-to-analogue conversion to the second audio signal, obtains simulated audio signal, and the simulated audio signal is same
When ingoing power amplifier and speech processing module, speech processing module obtains echo with reference to letter according to the simulated audio signal
Number；
Power amplifier carries out the direct drive loudspeaker of the output signal after power amplification to simulated audio signal and broadcasts
Put, now, the descending call sound of the talk business that loudspeaker is played can be heard (i.e.：The sound that call peer user is spoken
Sound), loudspeaker plays descending call sound also into sound collection equipment such as microphone etc.；
Assuming that now user have issued up call sound, the descending call sound that loudspeaker is played is (i.e.：Call opposite end
User's one's voice in speech) and the up call sound that sends of user is (i.e.：Converse this end subscriber one's voice in speech) while entering entering tone
Sound collecting device, now, the mixing voice signal that sound collection equipment is gathered, wherein the up call for both having been sent comprising user
The voice signal of sound, and play echo letter of the descending call sound produced by sound collection equipment pickup comprising loudspeaker
Number, speech processing module carries out echo cancellor using the mixing voice signal that echo reference signal is gathered to sound collection equipment
Treatment, carries out noise reduction process to the voice signal obtained after echo cancellor afterwards, and the voice signal of acquisition is sent into encoding and decoding
Device；
Codec is sent to digital signal processor after carrying out analog-to-digital conversion to the ascending voice signal for receiving, by counting
Digital signal processor is directly transmitted to control device by word signal processor by cable；
Control device is received after voice signal, and transmission processe is carried out after being modulated by modem.
Whether whether clean elimination for echo signal is, to be accurately heavily dependent on echo reference signal, tradition
Various audio optimization processings of the echo reference signal that speech processing module is used not comprising power amplifier main frame, therefore forbidden relatively
Really, it is impossible to which echo signal is effectively suppressed.And in the above-mentioned two scene of the embodiment of the present invention, echo reference signal is come
The least significant end of downlink voice link is come from, i.e.,：The audio signal of DSP outputs, therefore echo reference signal is relatively accurate, echo disappears
Except effect preferably, echo can effectively be suppressed.
One of ordinary skill in the art will appreciate that：Realizing all or part of step of above method embodiment can pass through
Programmed instruction related hardware is completed, and foregoing program can be stored in a computer read/write memory medium, the program
Upon execution, the step of including above method embodiment is performed；And foregoing storage medium includes：ROM, RAM, magnetic disc or light
Disk etc. is various can be with the medium of store program codes.
Each embodiment is described by the way of progressive in this specification, and what each embodiment was stressed is and it
The difference of its embodiment, same or analogous part cross-reference between each embodiment.For embodiment of the method
For, because it is substantially corresponding with apparatus embodiments, so description is fairly simple, referring to the portion of embodiment of the method in place of correlation
Defend oneself bright.
The method of the present invention and equipment may be achieved in many ways.For example, can by software, hardware, firmware or
Software, hardware, any combinations of firmware realize the method for the present invention and equipment.The said sequence of the step of for methods described
Order described in detail above is not limited to merely to illustrate, the step of the method for the present invention, it is special unless otherwise
Do not mentionlet alone bright.Additionally, in certain embodiments, also the present invention can be embodied as recording program in the recording medium, these programs
Including the machine readable instructions for realizing the method according to the invention.Thus, the present invention also covering storage is for performing basis
The recording medium of the program of the method for the present invention.
Description of the invention is given for the sake of example and description, and is not exhaustively or by the present invention
It is limited to disclosed form.Many modifications and variations are for the ordinary skill in the art obvious.Select and retouch
State embodiment and be to more preferably illustrate principle of the invention and practical application, and one of ordinary skill in the art is managed
The solution present invention is suitable to the various embodiments with various modifications of special-purpose so as to design.
Claims (17)
1. a kind of vehicle-mounted power amplifying device, it is characterised in that including digital signal processor, speech processing module and codec；
Wherein：
The digital signal processor, the first audio signal that the control device of vehicle where for receiving sends, and to described
First audio signal carries out audio optimization processing, obtains the second audio signal and is sent to the codec；And will be described
The audio digital signals that codec sends are transmitted to the control device；
The codec, for carrying out digital-to-analogue conversion to second audio signal, second audio signal is converted to
Simulated audio signal is will pass through player plays；And modulus turn is carried out to the voice signal that the speech processing module sends
Change, the voice signal is converted into audio digital signals and the digital signal processor is sent to；
The speech processing module, for obtaining echo reference signal from the simulated audio signal；And receive sound collection
The mixing voice signal that equipment sends, voice signal and the player plays that the mixing voice signal sends including user
The sound that the simulated audio signal is produced is by the caused echo signal of sound collection equipment pickup；Using the echo
Reference signal carries out echo cancellation process to the echo signal in the mixing voice signal, in the acquisition mixing voice signal
Voice signal and be sent to the codec.
2. vehicle-mounted power amplifying device according to claim 1, it is characterised in that the digital signal processor is to described first
When audio signal carries out audio optimization processing, specifically include carries out following any one or more place to first audio signal
Reason：Upper stereo process, delay process, equilibrium treatment, dynamic range control treatment.
3. vehicle-mounted power amplifying device according to claim 1 and 2, it is characterised in that the speech processing module is from the mould
When intending audio signal acquisition echo reference signal, specifically for：
The simulated audio signal is directly extracted for echo reference signal；Or
Predetermined linear treatment is carried out to the simulated audio signal, echo reference signal is obtained.
4. according to any described vehicle-mounted power amplifying device of claims 1 to 3, it is characterised in that the speech processing module is utilized
When the echo reference signal carries out echo cancellation process to the echo signal in the mixing voice signal, specifically for：
Using echo transfer function, echo cancellation signal is obtained by the echo reference signal；And
Echo cancellation process is carried out to the mixing voice signal using the echo cancellation signal, the voice signal is obtained.
5. according to any described vehicle-mounted power amplifying device of Claims 1-4, it is characterised in that when the player is for multiple, institute
Speech processing module is stated, the space propagation distance to the sound collection equipment according to multiple players is additionally operable to, multiple is broadcast
Put device and play the sound of the simulated audio signal generation by the caused multichannel echo signal of sound collection equipment pickup
Delay disposal is carried out respectively, with the multichannel echo signal that multiple players that align cause respectively.
6., according to any described vehicle-mounted power amplifying device of claim 1 to 5, it is characterised in that the speech processing module, also use
The voice signal obtained after to echo cancellor carries out noise reduction process；And/or
The vehicle-mounted power amplifying device also includes：
Power amplifier, for carrying out power amplification to the simulated audio signal that the codec is exported, and by power amplification
Simulated audio signal afterwards is sent to player and plays out.
7. according to any described vehicle-mounted power amplifying device of claim 1 to 6, it is characterised in that first audio signal includes
The playing audio signal of multimedia business；The voice signal is included for playing out control to multimedia business
Phonetic control command；Or
First audio signal includes the audio signal of talk business；The voice signal includes user in the talk business
The ascending voice signal or the phonetic control command for being controlled to the talk business of transmission.
8. a kind of vehicle, it is characterised in that including：Control device, sound collection equipment, player and claim 1 to 7 are any
Described vehicle-mounted power amplifying device.
9. vehicle according to claim 8, it is characterised in that the control device, for recognizing current business model,
The service processing mode includes multimedia business or talk business；And
If current business model is multimedia business, the phonetic control command that the vehicle-mounted power amplifying device sends is recognized,
Corresponding control message and the microprocessor being sent in the vehicle-mounted power amplifying device are generated based on the phonetic control command, with
Toilet states microprocessor and is based on the broadcasting that the control message controls multimedia business；
If current business model is communication service, up hair is carried out to the ascending voice signal that the vehicle-mounted power amplifying device sends
Send treatment.
10. the audio play handling method of a kind of vehicle, it is characterised in that the vehicle includes that control device and vehicle-mounted power amplifier set
It is standby；Methods described includes：
Digital signal processor in vehicle-mounted power amplifying device receives the first audio signal that control device sends, and to described first
Audio signal carries out audio optimization processing, obtains the second audio signal and the encoding and decoding being sent in the vehicle-mounted power amplifying device
Device；
Codec carries out digital-to-analogue conversion to second audio signal, and second audio signal is converted into analogue audio frequency letter
Number, and by player plays；
Speech processing module in vehicle-mounted power amplifying device obtains echo reference signal from the simulated audio signal；
Speech processing module receives the mixing voice signal that sound collection equipment sends, and the mixing voice signal is sent out including user
The sound that the voice signal and simulated audio signal described in the player plays for going out are produced is picked up by the sound collection equipment
Caused echo signal；
Speech processing module carries out echo and disappears using the echo reference signal to the echo signal in the mixing voice signal
Except treatment, obtain the voice signal in the mixing voice signal and be sent to the codec；
The codec carries out analog-to-digital conversion to the voice signal that the speech processing module sends, and the voice signal is turned
It is changed to audio digital signals and is sent to the digital signal processor；
The audio digital signals that the codec sends are transmitted to the control device by the digital signal processor.
11. methods according to claim 10, it is characterised in that carried out at audio optimization to first audio signal
Reason, including：
Following any one or more treatment is carried out to first audio signal：Upper stereo process, delay process, at equilibrium
Reason, dynamic range control treatment.
12. method according to claim 10 or 11, it is characterised in that obtain echo reference from the simulated audio signal
Signal, including：
The simulated audio signal is directly extracted for echo reference signal；Or
Predetermined linear treatment is carried out to the simulated audio signal, echo reference signal is obtained.
13. according to any described method of claim 10 to 12, it is characterised in that using the echo reference signal to described
Echo signal in mixing voice signal carries out echo cancellation process, including：
Using echo transfer function, echo cancellation signal is obtained by the echo reference signal；
Echo cancellation process is carried out to the mixing voice signal using the echo cancellation signal, the voice signal is obtained.
14. according to any described method of claim 10 to 13, it is characterised in that when the player is for multiple, using institute
State echo reference signal to it is described mixing voice signal in echo signal carry out echo cancellation process before, also include：
The speech processing module is played according to the space propagation distance of multiple players to the sound collection equipment to multiple
Device plays the sound of the simulated audio signal generation by the caused multichannel echo signal point of sound collection equipment pickup
Delay disposal is not carried out, with the multichannel echo signal that multiple players that align cause respectively.
15. according to any described method of claim 10 to 14, it is characterised in that also include：The speech processing module pair
The voice signal obtained after echo cancellor carries out noise reduction process；
And/or
It is described by player plays, also include：
Power amplifier in vehicle-mounted power amplifying device carries out power amplification to the simulated audio signal that the codec is exported, will
Simulated audio signal after power amplification is sent to player and plays out.
16. according to any described method of claim 10 to 15, it is characterised in that first audio signal includes multimedia
The playing audio signal of play service；The voice signal includes the voice for playing out control to multimedia business
Control instruction；Or
First audio signal includes the audio signal of talk business；The voice signal includes user in the talk business
The ascending voice signal or the phonetic control command for being controlled to the talk business of transmission.
17. according to any described method of claim 10 to 16, it is characterised in that the digital language for sending the codec
Message number is transmitted to after the control device, is also included：
The control device recognizes current business model, and the service processing mode includes multimedia business or call
Business；
If current business model is multimedia business, the phonetic control command that the vehicle-mounted power amplifying device sends is recognized,
Corresponding control message and the microprocessor being sent in the vehicle-mounted power amplifying device are generated based on the phonetic control command, with
Toilet states microprocessor and is based on the broadcasting that the control message controls multimedia business；
If current business model is communication service, up hair is carried out to the ascending voice signal that the vehicle-mounted power amplifying device sends
Send treatment.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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