CN106229002A - A kind of audio playing apparatus for automobile, method and automobile - Google Patents
A kind of audio playing apparatus for automobile, method and automobile Download PDFInfo
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- CN106229002A CN106229002A CN201610664275.4A CN201610664275A CN106229002A CN 106229002 A CN106229002 A CN 106229002A CN 201610664275 A CN201610664275 A CN 201610664275A CN 106229002 A CN106229002 A CN 106229002A
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10009—Improvement or modification of read or write signals
Abstract
The invention discloses a kind of audio playing apparatus for automobile, method and automobile, it belongs to automotive field.This device includes: signal generation module, for generating the first digital audio and video signals, and exports this signal to signal conversion module；Signal conversion module, for receiving the first digital audio and video signals, is converted into the first digital audio and video signals car audio bus signals, and exports car audio bus signals to vehicle-mounted power amplifier module；Vehicle-mounted power amplifier module, for receiving car audio bus signals by car audio EBI, is converted into the second digital audio and video signals by car audio bus signals, and exports to audio playing module after the second digital audio and video signals is converted into simulated audio signal；Audio playing module, is used for receiving and playing simulated audio signal.Such scheme ensure that the high fidelity of audio signal and the real-time of audio transmission, reduces vehicle-mounted wiring complexity, alleviates the weight of transmission cable wire harness simultaneously.
Description
Technical field
The present invention relates to automotive field, be specifically related to a kind of audio playing apparatus for automobile, method and automobile.
Background technology
Automobile is that the life of people is provided convenience, and people use the time of automobile to get more and more.In order to use in improving car
The comfort level at family, at present, a lot of automobiles is fitted with sound system, makes user can on the way enjoy melodious music.
At present, car audio system is mainly connected vehicle-mounted loudspeaker group by the vehicle-mounted power amplifier with simulated audio signal interface
Become.When playing audio frequency, audio file signal or call return path signal export from vehicle-mounted central control system or vehicle entertainment system, warp
The analog signal line crossing wiring complicated is connected to car audio system.During realizing the present invention, inventor finds existing
Technology exists following problem: owing to using analogue signal transmission audio frequency, so audio signal is easily subject to interference, and be difficult to
The source of sound of reduction high-fidelity, uses analog signal line transmission audio signal simultaneously, and its wire laying mode is extremely complex, and adds
Wire harness weight and cost.
Summary of the invention
In view of the above problems, the embodiment of the present invention provides a kind of audio frequency for automobile solving the problems referred to above to play dress
Put, method and automobile.
An aspect according to the embodiment of the present invention, it is provided that a kind of audio playing apparatus for automobile, including: signal
Generation module, for generating the first digital audio and video signals, and exports the first digital audio and video signals to signal conversion module；Signal
Modular converter, for receiving the first digital audio and video signals, is converted into car audio bus signals by the first digital audio and video signals, and
Car audio bus signals is exported to vehicle-mounted power amplifier module；Vehicle-mounted power amplifier module, for connecing by car audio EBI
Receive car audio bus signals, car audio bus signals is converted into the second digital audio and video signals, and by the second DAB
Signal exports to audio playing module after being converted into simulated audio signal；Audio playing module, is used for receiving and playing analog audio
Frequently signal.
Optionally, signal generation module specifically for: by audio effect processing algorithm, the first digital audio and video signals is carried out sound
Effect processes, and exports the first digital audio and video signals after audio effect processing to signal conversion module.
Optionally, vehicle-mounted power amplifier module specifically for: by audio effect processing algorithm, the second digital audio and video signals is carried out sound
Effect processes, and exports after the second digital audio and video signals after audio effect processing is converted into simulated audio signal and play mould to audio frequency
Block.
Optionally, the quantity of audio playing module is multiple, and multiple audio playing module is respectively by vehicle-mounted power amplifier mould
Block is connected with signal conversion module.
Optionally, the first digital audio and video signals and the second digital audio and video signals include audio file signal or call passback letter
Number.
Optionally, at least one during audio effect processing algorithm includes following algorithm: EQ algorithm, 3D algorithm, BASS algorithm,
TREBLE algorithm, surround sound algorithm, Doby sound effect algorithms, DTS algorithm, PCM algorithm, AC-3 algorithm, THX algorithm, SDDS
Algorithm and power amplification algorithm.
Another aspect according to the embodiment of the present invention, it is provided that a kind of audio frequency playing method for automobile, including: generate
First digital audio and video signals；First digital audio and video signals is converted into car audio bus signals；Connect by car audio bus
Mouth receives car audio bus signals, and car audio bus signals is converted into the second digital audio and video signals, and by the second numeral
Audio signal is converted into simulated audio signal；Audio frequency broadcasting is carried out according to simulated audio signal.
Optionally, generate the first digital audio and video signals, the first digital audio and video signals is converted into car audio bus signals
Step specifically include: by audio effect processing algorithm, the first digital audio and video signals is carried out audio effect processing, will be after audio effect processing
The first digital audio and video signals be converted into car audio bus signals.
Optionally, car audio bus signals is converted into the second digital audio and video signals, and by the second digital audio and video signals
The step being converted into simulated audio signal specifically includes: carried out the second digital audio and video signals at audio by audio effect processing algorithm
Reason, is converted into simulated audio signal by the second digital audio and video signals after audio effect processing.
Optionally, the first digital audio and video signals and the second digital audio and video signals include audio file signal or call passback letter
Number.
Optionally, at least one during audio effect processing algorithm includes following algorithm: EQ algorithm, 3D algorithm, BASS algorithm,
TREBLE algorithm, surround sound algorithm, Doby sound effect algorithms, DTS algorithm, PCM algorithm, AC-3 algorithm, THX algorithm, SDDS
Algorithm and power amplification algorithm.
Another aspect according to the embodiment of the present invention, it is provided that a kind of automobile, broadcasts including the above-mentioned audio frequency for automobile
Put device.
In a kind of audio playing apparatus for automobile, method and automobile that the embodiment of the present invention provides, the will generated
One digital audio and video signals is converted into car audio bus signals；Receive car audio bus by car audio EBI to believe
Number, car audio bus signals is converted into the second digital audio and video signals, and the second digital audio and video signals is converted into analog audio
Frequently signal；Audio frequency broadcasting is carried out according to simulated audio signal.As can be seen here, digital audio and video signals is converted into by the embodiment of the present invention
Car audio bus signals, by car audio bus transfer, on the one hand ensure that the high fidelity of audio signal and audio frequency pass
Defeated real-time, on the other hand reduces vehicle-mounted wiring complexity, significantly reduces the weight of transmission cable wire harness, and then improves
Automobile fuel efficiency or battery life.
Described above is only the general introduction of technical solution of the present invention, in order to better understand the technological means of the present invention,
And can be practiced according to the content of description, and in order to allow above and other objects of the present invention, the feature and advantage can
Become apparent, below especially exemplified by the detailed description of the invention of the present invention.
Accompanying drawing explanation
By reading the detailed description of hereafter preferred implementation, various other advantage and benefit common for this area
Technical staff will be clear from understanding.Accompanying drawing is only used for illustrating the purpose of preferred implementation, and is not considered as the present invention
Restriction.And in whole accompanying drawing, it is denoted by the same reference numerals identical parts.In the accompanying drawings:
Fig. 1 shows the structure chart of the audio playing apparatus for automobile that one embodiment of the invention provides；
Fig. 2 shows the structure chart of the audio playing apparatus for automobile that another embodiment of the present invention provides；
Fig. 3 a and Fig. 3 b respectively illustrates the structure chart of the automobile that another embodiment of the present invention provides；
Fig. 4 shows the flow chart of the audio frequency playing method for automobile that another embodiment of the present invention provides；
Fig. 5 shows the flow chart of the audio frequency playing method for automobile that another embodiment of the present invention provides；
Fig. 6 shows the flow chart of the audio frequency playing method for automobile that another embodiment of the present invention provides；
Fig. 7 shows the flow chart of the audio frequency playing method for automobile that another embodiment of the present invention provides.
Detailed description of the invention
It is more fully described the exemplary embodiment of the disclosure below with reference to accompanying drawings.Although accompanying drawing shows the disclosure
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure and should be by embodiments set forth here
Limited.On the contrary, it is provided that these embodiments are able to be best understood from the disclosure, and can be by the scope of the present disclosure
Complete conveys to those skilled in the art.
Embodiments provide a kind of audio playing apparatus for automobile, method and automobile, at least can solve the problem that
Cannot ensure audio signal quality in prior art, vehicle-mounted wiring is complicated, the technical problem that wire harness weight is big, cost is high.
Fig. 1 shows the structure chart of the audio playing apparatus for automobile that one embodiment of the invention provides.Such as Fig. 1 institute
Showing, this device includes: signal generation module 11, signal conversion module 12, vehicle-mounted power amplifier module 13 and audio playing module 14.
The concrete structure of the various piece being described in detail below in the embodiment shown in Fig. 1 and operation principle:
Signal generation module 11 is for generating the first digital audio and video signals, and exports the first digital audio and video signals to signal
Modular converter 12.When implementing, signal generation module 11 can be realized by various softwares and/or example, in hardware, only flexibly
Want to produce the digital audio and video signals for playing.Such as, signal generation module 11 can be according to the sound prestored
Frequency file produces the digital audio and video signals for playing, it is also possible to produce the numeral for playing according to the voice data received
Audio signal, the concrete generating mode of digital audio and video signals is not limited by the present invention.
First digital audio and video signals, for receiving the first digital audio and video signals, is converted into automobile sound by signal conversion module 12
Frequently bus signals, and car audio bus signals is exported to vehicle-mounted power amplifier module 13.Wherein, car audio bus signals is vapour
The special signal of car audio-frequency bus, car audio bus is that the DAB that the ADI company of the U.S. releases for vehicular applications is total
Line, English name is Automotive Audio Bus, is abbreviated as A2B.When implementing, signal conversion module 12 is by the first number
After word audio signal is converted into car audio bus signals, car audio bus signals is transmitted by unshielded twisted pair,
And transmission line can be attached to use daisy chain form.
Vehicle-mounted power amplifier module 13 is for receiving car audio bus signals by car audio EBI, by car audio
Bus signals is converted into the second digital audio and video signals, and the second digital audio and video signals is converted into after simulated audio signal output to
Audio playing module 14.When implementing, vehicle-mounted power amplifier module 13 can be by possessing the special-purpose vehicle of car audio EBI
Load power amplifying device realizes, it is also possible to realize by adding the common vehicle-mounted power amplifying device of car audio bus interface module.
Audio playing module 14 is for receiving and play the simulated audio signal of vehicle-mounted power amplifier module 13 output.Implement
Time, audio playing module 14 can be made up of vehicle-mounted loudspeaker, it is also possible to can be play the equipment structure of simulated audio signal by other
Becoming, concrete structure and the form of audio playing module 14 are not limited by the present invention, as long as being capable of playing purpose.
The first above-mentioned digital audio and video signals and the second digital audio and video signals both can be identical, it is also possible to different.Generally feelings
Under condition, the second digital audio and video signals is different from the first digital audio and video signals, and the second digital audio and video signals is at the first DAB
Process it is exaggerated on the basis of signal.
As can be seen here, in embodiments of the present invention, simulated audio signal is converted to digital audio and video signals, by DAB
Signal is further converted into car audio bus signals, thus can either ensure the high fidelity of audio signal and audio transmission
Real-time, can utilize again car audio EBI to transmit multichannel data, and then reduce vehicle-mounted wiring complexity, significantly subtract
The weight of light transmission cable wire harness, and then improve automobile fuel efficiency or battery life.
Fig. 2 shows the structure chart of the audio playing apparatus for automobile that another specific embodiment of the present invention provides.
As described in Figure 2, this device includes: signal generation module 21, signal conversion module 22, vehicle-mounted power amplifier module 23 and multiple audio frequency are broadcast
Amplification module 24.
The concrete structure of the various piece being described in detail below in the embodiment shown in Fig. 2 and operation principle:
Signal generation module 21 is for generating the first digital audio and video signals, and exports the first digital audio and video signals to signal
Modular converter 22.When implementing, signal generation module 21 can be one and be integrated in vehicle-mounted central control system or car entertainment system
Module in system, is generated number by this module according to the control of the control module comprised in vehicle-mounted central control system or vehicle entertainment system
Word audio signal；Signal generation module 21 can also be an independent mould being connected with vehicle-mounted central control system or vehicle entertainment system
Block, generates digital audio and video signals according to receive from vehicle-mounted central control system or the voice data of vehicle entertainment system.Remove
Outside this, signal generation module 21 can also use other various softwares and/or example, in hardware to realize, as long as being capable of producing
The purpose of digital audio and video signals, its concrete form is not limited by the present invention.
First digital audio and video signals, for receiving the first digital audio and video signals, is converted into automobile sound by signal conversion module 22
Frequently bus signals, and car audio bus signals is exported to vehicle-mounted power amplifier module 23.When implementing, signal conversion module 22
After first digital audio and video signals is converted into car audio bus signals, car audio bus signals is passed through unshielded twisted pair
It is transmitted, and transmission line can realize to use daisy chain form.Wherein, inventor sends out during realizing the present invention
Existing, digital audio and video signals is converted into the mode that car audio bus signals is transmitted and possesses plurality of advantages: first, pass through sound
Frequently EBI only need to use a branch of unshielded twisted pair just can be with the voice data of 32 passages of transmitted in both directions, such as, it is only necessary to
Want 1 bundle unshielded twisted pair just can be coupled together by 8 audio nodes, ensure voice data transmission real-time between node
Under premise, greatly reduce complexity and the tare of whole-vehicle wiring.Second, A2B maximum supports 9 node (1 host nodes
With 8 from node), use daisy chain form to connect, between node, maximum support 10-meter line cable, whole piece link is supported maximum 40
The cable of rice distance, it may be assumed that transmission range is long, can the various occasion of flexible adaptation；And, between first node and the 9th node
Voice data transmission delay maximum only have 50 μ s, it may be assumed that propagation delay time is short, and the waiting time of user is greatly shortened.3rd, logical
Cross audio bus interface and be also convenient for realizing other expanded function, for instance, it is possible to realize the remotely merit such as control and fault diagnosis
Can, but also possess the ability of the Phantom Power that each node is provided maximum about 50mA.It addition, at each audio node
On, MCU and CAN etc. can be saved and control interface, and, in the case of using Phantom Power, part of nodes also without
Use power supply chip, thus done weight reducing process for each audio node, reduce system cost.As can be seen here, in this enforcement
In example, it is transmitted at least being capable of reducing wiring complexity by digital audio and video signals is converted to car audio bus signals
Spend, shorten propagation delay time, be easy to the technique effects such as extension.
Vehicle-mounted power amplifier module 23 is for receiving car audio bus signals by car audio EBI, by described audio frequency
Bus signals is converted into the second digital audio and video signals, and the second digital audio and video signals is converted into after simulated audio signal output to
Audio playing module 24.When implementing, vehicle-mounted power amplifier module 23 can be by possessing the special-purpose vehicle of car audio EBI
Load power amplifying device realizes, it is also possible to realize by adding the common vehicle-mounted power amplifying device of car audio bus interface module.
Audio playing module 24 is used for receiving and playing simulated audio signal.When implementing, audio playing module 24 can
To be made up of vehicle-mounted loudspeaker, it is also possible to the equipment that can be play simulated audio signal by other is constituted.In the present embodiment, audio frequency
The quantity of playing module 24 is multiple, and multiple audio playing module 24 is respectively by vehicle-mounted power amplifier module 23 and signal modulus of conversion
Block 22 be connected (Fig. 2 only schematically illustrates with three audio playing module 24, practical situation sound intermediate frequency playing module
Quantity can also be two or more).Specifically, the annexation between audio playing module 24 and other each modules can
There to be following several situation: in the first case, when the quantity of vehicle-mounted power amplifier module 23 is also multiple, and vehicle-mounted power amplifier module
When the quantity of 23 is equal to the quantity of audio playing module 24, only corresponding one audio frequency of connection of vehicle-mounted power amplifier module 23 plays mould
Block 24, the most all of vehicle-mounted power amplifier module 23 is connected in same signal conversion module 22.In the second situation, work as car
Carry power amplifier module 23 quantity also be multiple, and the quantity of vehicle-mounted power amplifier module 23 be less than audio playing module 24 quantity time,
The factor such as sound channel that audio playing module 24 plays can be combined in advance all of audio playing module 24 is grouped, same
The audio playing module 24 of group is connected on same vehicle-mounted power amplifier module 23, and the most all of vehicle-mounted power amplifier module 23 is connected to
In same signal conversion module 22.In the third situation, when the quantity of vehicle-mounted power amplifier module 23 is only one, all of
Audio playing module 24 is all connected on same vehicle-mounted power amplifier module 23, and then this vehicle-mounted power amplifier module 23 turns with a signal
Die change block 22 is connected.Those skilled in the art can choose either one in above-mentioned several ways the most flexibly
Formula.It addition, those skilled in the art can also carry out various improvement and deformation, example to the modules in the embodiment of the present invention
As, it is also possible to being integrated in audio playing module 24 by vehicle-mounted power amplifier module 23, which is particularly suited for above-mentioned the first
In situation.
When implementing, multiple audio playing module 24 can be separately positioned on the diverse location of automobile according to passenger position
On, for example, it is possible to be separately positioned at each seat of automobile, it is possible to guarantee that all passengers can clearly broadcast in uppick
Put content, and multiple audio playing module can also form stereophonic effect, promotes audio quality；Can also be according to not unisonance
Effect technique standard arranges the position of audio playing module 24, such as, when using Dolby Digital 5.1 sound effect technology standard, need
In the middle part of the left front position of interior space, front side, right front portion position, left back position, right rear arrange 5 audio playing module 24 with
And in car, correct position arranges 1 audio playing module 24 with subwoofer effect, thus can build height in car
The surround sound of quality, promotes audio quality further.
As can be seen here, by cooperating of above-mentioned modules, the purpose that audio frequency is play can be realized.It addition, in order to
Promote the effect that audio frequency is play further, in the present embodiment, it is also possible to further audio signal to be played is carried out sound
Effect processes, thus increases various specially good effects according to user's request, to promote the auditory effect of music.When implementing, can pass through
Three kinds of modes carry out audio effect processing below:
In the first audio effect processing mode, signal generation module 21 perform audio effect processing and operate.Specifically, signal is raw
After becoming module 21 to generate the first digital audio and video signals, by audio effect processing algorithm, the first digital audio and video signals is carried out sound further
Effect processes, and exports the first digital audio and video signals after audio effect processing to signal conversion module 22, thus promotes follow-up
The auditory effect of play signal.
In the second audio effect processing mode, vehicle-mounted power amplifier module 23 perform audio effect processing and operate.Specifically, vehicle-mounted merit
After car audio bus signals is converted into the second digital audio and video signals by amplification module 23, further by audio effect processing algorithm to the
Two digital audio and video signals carry out audio effect processing, and the second digital audio and video signals after audio effect processing is converted into analogue audio frequency letter
Export after number to audio playing module 24, thus promote the auditory effect of follow-up play signal.
In the third audio effect processing mode, secondary noise at the beginning of first first digital audio and video signals being carried out by signal generation module 21
Effect processes, and by vehicle-mounted power amplifier module 23, second digital audio and video signals carries out secondary audio effect processing, twice audio effect processing the most again
Time can both use identical audio effect processing algorithm, it would however also be possible to employ different audio effect processing algorithms, by twice audio effect processing
Digital audio and video signals can reach higher fidelity, bring more preferable auditory perception to user.
In above-mentioned various audio effect processing modes, all can select various audio effect processing algorithm flexibly, and can be real
Existing various types of audios.Wherein, common sound effect algorithms includes: EQ algorithm, 3D algorithm, BASS algorithm, TREBLE algorithm, ring
Around stereo algorithm, Doby sound effect algorithms, DTS algorithm, PCM algorithm, AC-3 algorithm, THX algorithm, SDDS algorithm and power
Interpolator arithmetic etc..The present invention does not limit concrete audio effect processing algorithm, and those skilled in the art can be according to practical situation spirit
Live and use.
It addition, in the present embodiment, the first above-mentioned digital audio and video signals and the second digital audio and video signals can be various
Type or the signal in various source, for example, it may be audio file signal, it is also possible to it is call return path signal, it is also possible to be it
His audio signal.Further, the first digital audio and video signals and the second digital audio and video signals both can be identical, it is also possible to different.Generally
In the case of, the second digital audio and video signals is different from the first digital audio and video signals, and the second digital audio and video signals is at the first numeral sound
Frequently it is exaggerated process on the basis of signal.
As can be seen here, in embodiments of the present invention, digital audio and video signals is passed through car audio EBI at twisted-pair feeder
On be transmitted, and be transferred to have employed the vehicle-mounted power amplifier of car audio EBI, it is ensured that the high fidelity of audio signal
With the real-time of audio transmission, and car audio bus is possible not only to transmit audio signal and is also provided that the interface of control signal,
And also multiple audio playing module can be simultaneously connected with, while promoting tonequality, also significantly reduce vehicle-mounted wiring multiple
Miscellaneous degree, reduces propagation delay time and car audio system BOM cost, significantly reduces the weight of transmission cable wire harness, and then
Improve automobile fuel efficiency or battery life.
It addition, those skilled in the art can also carry out various change and deformation to the embodiment shown in Fig. 2.Such as, exist
In embodiment shown in Fig. 2, signal generation module 21 and signal conversion module 22 are two separate existence, independent operatings
Module, it will be appreciated to those of skill in the art that signal generation module 21 and signal turn in other embodiment of the present invention
Die change block 22 can also be integrated into a module, and its specific implementation is not limited by the present invention.It addition, the present invention other
Embodiment in, the quantity of vehicle-mounted power amplifier module 23 can also be multiple.
Fig. 3 a shows the structural representation of the automobile 300 that one embodiment of the invention provides, as shown in Figure 3 a, this automobile
300 include signal generation module 11 in the above-mentioned audio playing apparatus for automobile, signal conversion module 12, vehicle-mounted power amplifier
Module 13 and audio playing module 14.Fig. 3 b shows the structural representation of the automobile 300' that one embodiment of the invention provides,
As shown in Figure 3 b, this automobile 300' includes the signal generation module 21 in the above-mentioned audio playing apparatus for automobile, signal
Modular converter 22, vehicle-mounted power amplifier module 23 and audio playing module 24.Wherein, the quantity of audio playing module 24 is multiple, and
Multiple audio playing module 24 are connected with signal conversion module 22 by vehicle-mounted power amplifier module 23 respectively.
Fig. 4 shows the flow chart of the audio frequency playing method for automobile that another specific embodiment of the present invention provides.
As described in Figure 4, the method comprises the steps:
Step S401: generate the first digital audio and video signals；
When implementing, the step generating the first digital audio and video signals can be flexibly by various softwares and/or hardware shape
Formula realizes, as long as the digital audio and video signals for playing can be produced.Can produce according to the audio file prestored
For the digital audio and video signals play, it is also possible to produce the digital audio and video signals for playing according to the voice data received,
The concrete generating mode of digital audio and video signals is not limited by the present invention.
Step S402: the first digital audio and video signals is converted into car audio bus signals；
Wherein, car audio bus signals is the special signal of car audio bus, and car audio bus is the ADI of the U.S.
The digital audio bus that company releases for vehicular applications, English name is Automotive Audio Bus, is abbreviated as A2B.
When implementing, the first digital audio and video signals the car audio bus signals being converted to is transmitted by unshielded twisted pair,
And transmission line can be attached to use daisy chain form.
Step S403: receive car audio bus signals by car audio EBI, by car audio bus signals
It is converted into the second digital audio and video signals, and the second digital audio and video signals is converted into simulated audio signal.When implementing, permissible
Car audio bus signals is received, it is also possible to by installing additional by possessing the Special vehicle-mounted power amplifying device of car audio EBI
The common vehicle-mounted power amplifying device having car audio bus interface module receives car audio bus signals.
Step S404: carry out audio frequency broadcasting according to simulated audio signal.
When implementing, audio frequency broadcasting can be carried out by vehicle-mounted loudspeaker, it is also possible to analog audio can be play by other
Frequently the equipment of signal carries out audio frequency broadcasting.
The first above-mentioned digital audio and video signals and the second digital audio and video signals both can be identical, it is also possible to different.Generally feelings
Under condition, the second digital audio and video signals is different from the first digital audio and video signals, and the second digital audio and video signals is at the first DAB
Process it is exaggerated on the basis of signal.
As can be seen here, in embodiments of the present invention, simulated audio signal is converted to digital audio and video signals, by DAB
Signal is further converted into car audio bus signals, thus can either ensure the high fidelity of audio signal and audio transmission
Real-time, can utilize again car audio EBI to transmit multichannel data, and then reduce vehicle-mounted wiring complexity, significantly subtract
The weight of light transmission cable wire harness, and then improve automobile fuel efficiency or battery life.
Fig. 5 shows the flow chart of the audio frequency playing method for automobile that another specific embodiment of the present invention provides.
As described in Figure 5, the method comprises the steps:
Step S501: generate the first digital audio and video signals.
When implementing, the first digital audio and video signals can be by being integrated in vehicle-mounted central control system or vehicle entertainment system
Certain module generates, it is also possible to by a standalone module being connected with vehicle-mounted central control system or vehicle entertainment system according to receiving
Generate from vehicle-mounted central control system or the voice data of vehicle entertainment system.In addition, this first digital audio and video signals
Other various softwares and/or hardware can be used to realize, as long as being capable of producing the purpose of digital audio and video signals, this
Bright its concrete generation method is not limited.
Step S502: the first digital audio and video signals is carried out audio effect processing by audio effect processing algorithm.
It is to bring more preferable audio experience to user that first digital audio and video signals carries out audio effect processing.At above-mentioned sound
Effect processes in step, can select various audio effect processing algorithm flexibly, and can realize various types of audio.Wherein, often
The sound effect algorithms seen includes: EQ algorithm, 3D algorithm, BASS algorithm, TREBLE algorithm, surround sound algorithm, Doby audio are calculated
Method, DTS algorithm, PCM algorithm, AC-3 algorithm, THX algorithm, SDDS algorithm and power amplification algorithm etc..The present invention does not limit
Fixed concrete audio effect processing algorithm, those skilled in the art can use flexibly according to practical situation.
Step S503: the first digital audio and video signals is converted into car audio bus signals.
When implementing, car audio bus signals is transmitted by unshielded twisted pair, and transmission line is permissible
Daisy chain form is used to realize.Wherein, inventor finds during realizing the present invention, and digital audio and video signals is converted into vapour
The mode that car audio-frequency bus signal is transmitted possesses plurality of advantages: first, only need to be used a branch of non-by audio bus interface
Shielded Twisted Pair just can be with the voice data of 32 passages of transmitted in both directions, for example, it will only be necessary to 1 bundle unshielded twisted pair just can be by
8 audio nodes couple together, and on the premise of ensureing that between node, voice data transmits real-time, greatly reduce whole-vehicle wiring
Complexity and tare.Second, A2B maximum supports 9 nodes (1 host node and 8 from node), uses Flos Chrysanthemi chain
Formula connects, and between node, maximum support 10-meter line cable, whole piece link is supported the cable of maximum 40 meters of distances, it may be assumed that transmission range
Long, can the various occasion of flexible adaptation；And, the voice data transmission delay between first node and the 9th node is maximum only
There are 50 μ s, it may be assumed that propagation delay time is short, the waiting time of user is greatly shortened.3rd, it is also convenient for realizing by audio bus interface
Other expanded function, for instance, it is possible to realize the remotely function such as control and fault diagnosis, but also possesses and carries each node
Ability for the Phantom Power of maximum about 50mA.It addition, on each audio node, MCU and CAN etc. can be saved and controls
Interface, and, in the case of using Phantom Power, part of nodes is also without using power supply chip, thus is each audio frequency
Node has done weight reducing process, reduces system cost.As can be seen here, in the present embodiment, by digital audio and video signals is changed
It is transmitted at least being capable of reducing wiring complexity for car audio bus signals, shortens propagation delay time, be easy to extension etc.
Technique effect.
Step S504: receive car audio bus signals by car audio EBI, by car audio bus signals
It is converted into the second digital audio and video signals, and the second digital audio and video signals is converted into simulated audio signal.When implementing, permissible
The second digital audio and video signals is received, it is also possible to by installing additional by possessing the Special vehicle-mounted power amplifying device of car audio EBI
The common vehicle-mounted power amplifying device having car audio bus interface module receives the second digital audio and video signals.
Step S505: carry out audio frequency broadcasting according to simulated audio signal.
When implementing, audio frequency broadcasting can be carried out by vehicle-mounted loudspeaker, it is also possible to analog audio can be play by other
Frequently the equipment of signal carries out audio frequency broadcasting.
It addition, in the present embodiment, the first above-mentioned digital audio and video signals and the second digital audio and video signals can be various
Type or the signal in various source, for example, it may be audio file signal, it is also possible to it is call return path signal, it is also possible to be it
His audio signal.Further, the first digital audio and video signals and the second digital audio and video signals both can be identical, it is also possible to different.Generally
In the case of, the second digital audio and video signals is different from the first digital audio and video signals, and the second digital audio and video signals is at the first numeral sound
Frequently it is exaggerated process on the basis of signal.
As can be seen here, in embodiments of the present invention, digital audio and video signals is passed through car audio EBI at twisted-pair feeder
Upper transmission, reduces propagation delay time, it is ensured that the high fidelity of audio signal and the real-time of audio transmission, utilizes automobile simultaneously
Audio bus interface transmission multichannel data, and then reduce vehicle-mounted wiring complexity and car audio system BOM cost, significantly
Alleviate the weight of transmission cable wire harness, and then improve automobile fuel efficiency or battery life, meanwhile, audio effect processing step
The audio frequency played back can be allowed to have more preferable auditory effect, bring the most comfortable audio experience more shaken to passenger.
Fig. 6 shows that the audio frequency for automobile that another specific embodiment of the present invention provides plays the flow process of kind of method
Figure.As described in Figure 6, the method comprises the steps:
Step S601: generate the first digital audio and video signals.
When implementing, the first digital audio and video signals can be by being integrated in vehicle-mounted central control system or vehicle entertainment system
Certain module generates, it is also possible to by a standalone module being connected with vehicle-mounted central control system or vehicle entertainment system according to receiving
Generate from vehicle-mounted central control system or the voice data of vehicle entertainment system.In addition, this first digital audio and video signals
Other various softwares and/or hardware can be used to realize, as long as being capable of producing the purpose of digital audio and video signals, this
Bright its concrete generation method is not limited.
Step S602: the first digital audio and video signals is converted into car audio bus signals.
When implementing, car audio bus signals is transmitted by unshielded twisted pair, and transmission line is permissible
Daisy chain form is used to realize.
Step S603: receive car audio bus signals by car audio EBI, by car audio bus signals
It is converted into the second digital audio and video signals, by audio effect processing algorithm, described second digital audio and video signals is carried out audio effect processing, and
Second digital audio and video signals is converted into simulated audio signal.When implementing, can be by possessing car audio EBI
Special vehicle-mounted power amplifying device receive the second digital audio and video signals, it is also possible to by adding car audio bus interface module
Common vehicle-mounted power amplifying device receives the second digital audio and video signals.
It is to bring more preferable audio experience to user that second digital audio and video signals carries out audio effect processing.At above-mentioned sound
Effect processes in step, can select various audio effect processing algorithm flexibly, and can realize various types of audio.Wherein, often
The sound effect algorithms seen includes: EQ algorithm, 3D algorithm, BASS algorithm, TREBLE algorithm, surround sound algorithm, Doby audio are calculated
Method, DTS algorithm, PCM algorithm, AC-3 algorithm, THX algorithm, SDDS algorithm and power amplification algorithm etc..The present invention does not limit
Fixed concrete audio effect processing algorithm, those skilled in the art can use flexibly according to practical situation.
Step S604: carry out audio frequency broadcasting according to simulated audio signal.
When implementing, audio frequency broadcasting can be carried out by vehicle-mounted loudspeaker, it is also possible to analog audio can be play by other
Frequently the equipment of signal carries out audio frequency broadcasting.
In the present embodiment, the first above-mentioned digital audio and video signals and the second digital audio and video signals can be all kinds or
The signal in various sources, for example, it may be audio file signal, it is also possible to it is call return path signal, can also be other sounds
Frequently signal.Further, the first digital audio and video signals and the second digital audio and video signals both can be identical, it is also possible to different.Normal conditions
Under, the second digital audio and video signals is different from the first digital audio and video signals, and the second digital audio and video signals is believed at the first DAB
Process it is exaggerated on the basis of number.
As can be seen here, in embodiments of the present invention, digital audio and video signals is passed through car audio EBI at twisted-pair feeder
Upper transmission, reduces propagation delay time, it is ensured that the high fidelity of audio signal and the real-time of audio transmission, meanwhile, utilizes vapour
Car audio bus interface transmission multichannel data, and then reduce vehicle-mounted wiring complexity and car audio system BOM cost, aobvious
Writing the weight alleviating transmission cable wire harness, and then improve automobile fuel efficiency or battery life, meanwhile, audio effect processing walks
Suddenly the audio frequency played back can be allowed to have more preferable auditory effect, bring the most comfortable audio experience more shaken to passenger.
Wherein, the differring primarily in that of the embodiment shown in Fig. 5 with Fig. 6: the opportunity performing audio effect processing is different.Specifically
Ground, the first digital audio and video signals, before being converted to car audio bus signals, is carried out at audio by the embodiment shown in Fig. 5
Reason；Second digital audio and video signals, after being converted to car audio bus signals, is carried out at audio by the embodiment shown in Fig. 6
Reason.Those skilled in the art can select suitable processing mode according to the actual requirements.Wherein, the first digital audio and video signals and
Two digital audio and video signals both can be identical, it is also possible to different.Under normal circumstances, the second digital audio and video signals is different from the first numeral
Audio signal, and the second digital audio and video signals is exaggerated process on the basis of the first digital audio and video signals.
Fig. 7 shows the flow chart of the audio frequency playing method for automobile that another specific embodiment of the present invention provides.
As described in Figure 7, the method comprises the steps:
Step S701: generate the first digital audio and video signals.
When implementing, the first digital audio and video signals can be by being integrated in vehicle-mounted central control system or vehicle entertainment system
Certain module generates, it is also possible to by a standalone module being connected with vehicle-mounted central control system or vehicle entertainment system according to receiving
Generate from vehicle-mounted central control system or the voice data of vehicle entertainment system.In addition, this first digital audio and video signals
Other various softwares and/or hardware can be used to realize, as long as being capable of producing the purpose of digital audio and video signals, this
Bright its concrete generation method is not limited.
Step S702: the first digital audio and video signals is carried out audio effect processing by audio effect processing algorithm.
Step S703: the first digital audio and video signals is converted into car audio bus signals.
When implementing, car audio bus signals is transmitted by unshielded twisted pair, and transmission line is permissible
Daisy chain form is used to realize.
Step S704: receive car audio bus signals by car audio EBI, by car audio bus signals
It is converted into the second digital audio and video signals, by audio effect processing algorithm, described second digital audio and video signals is carried out audio effect processing, and
Second digital audio and video signals is converted into simulated audio signal.When implementing, can be by possessing car audio EBI
Special vehicle-mounted power amplifying device receive the second digital audio and video signals, it is also possible to by adding car audio bus interface module
Common vehicle-mounted power amplifying device receives the second digital audio and video signals.
Step S705: carry out audio frequency broadcasting according to simulated audio signal.
When implementing, audio frequency broadcasting can be carried out by vehicle-mounted loudspeaker, it is also possible to analog audio can be play by other
Frequently the equipment of signal carries out audio frequency broadcasting.
In step S702 and S704, respectively the first digital audio and video signals and the second digital audio and video signals are carried out audio
Process, be to bring more preferable audio experience to user.In above-mentioned audio effect processing step, various audio can be selected flexibly
Processing Algorithm, and various types of audio can be realized.Wherein, common sound effect algorithms includes: EQ algorithm, 3D algorithm,
BASS algorithm, TREBLE algorithm, surround sound algorithm, Doby sound effect algorithms, DTS algorithm, PCM algorithm, AC-3 algorithm, THX
Algorithm, SDDS algorithm and power amplification algorithm etc..The present invention does not limit concrete audio effect processing algorithm, art technology
Personnel can use flexibly according to practical situation.
In the present embodiment, the first above-mentioned digital audio and video signals and the second digital audio and video signals can be all kinds or
The signal in various sources, for example, it may be audio file signal, it is also possible to it is call return path signal, can also be other sounds
Frequently signal.Further, the first digital audio and video signals and the second digital audio and video signals both can be identical, it is also possible to different.Normal conditions
Under, the second digital audio and video signals is different from the first digital audio and video signals, and the second digital audio and video signals is believed at the first DAB
Process it is exaggerated on the basis of number.
As can be seen here, in embodiments of the present invention, digital audio and video signals is passed through car audio EBI at twisted-pair feeder
Upper transmission, reduces propagation delay time, it is ensured that the high fidelity of audio signal and the real-time of audio transmission, meanwhile, utilizes vapour
Car audio bus interface transmission multichannel data, and then reduce vehicle-mounted wiring complexity and car audio system BOM cost, aobvious
Write the weight alleviating transmission cable wire harness, and then improve automobile fuel efficiency or battery life, meanwhile, by first
Twice audio effect processing step of digital audio and video signals and the second digital audio and video signals can allow the audio frequency played back have more preferably
Auditory effect, bring the most comfortable audio experience more shaken to passenger.
In sum, in a kind of audio playing apparatus for automobile, method and the automobile that the present invention provides, will generate
The first digital audio and video signals be converted into car audio bus signals；Car audio bus is received by car audio EBI
Signal, is converted into car audio bus signals the second digital audio and video signals, and the second digital audio and video signals is converted into simulation
Audio signal；Audio frequency broadcasting is carried out according to simulated audio signal.As can be seen here, digital audio and video signals is converted into automobile by the present invention
Audio-frequency bus signal, by car audio bus transfer, on the one hand reduces propagation delay time, it is ensured that the high-fidelity of audio signal
Degree and the real-time of audio transmission, on the other hand utilize car audio EBI to transmit multichannel data, and then reduce vehicle-mounted
Wiring complexity and car audio system BOM cost, significantly reduce the weight of transmission cable wire harness, and then improve automobile
Fuel efficiency or battery life.
Although additionally, it will be appreciated by those of skill in the art that embodiments more in this include institute in other embodiments
Including some feature rather than further feature, but the combination of the feature of different embodiment means to be in the scope of the present invention
Within and form different embodiments.Such as, in the following claims, embodiment required for protection any it
One can mode use in any combination.
The all parts embodiment of the present invention can realize with hardware, or to run on one or more processor
Software module realize, or with combinations thereof realize.It will be understood by those of skill in the art that and can use in practice
Microprocessor or digital signal processor (DSP) realize the some or all portions in device according to embodiments of the present invention
The some or all functions of part.The present invention is also implemented as the part for performing method as described herein or complete
The equipment in portion or device program (such as, computer program and computer program).Such program realizing the present invention
Can store on a computer-readable medium, or can be to have the form of one or more signal.Such signal is permissible
Download from internet website and obtain, or provide on carrier signal, or provide with any other form.
The present invention will be described rather than limits the invention to it should be noted above-described embodiment, and ability
Field technique personnel can design alternative embodiment without departing from the scope of the appended claims.In the claims,
Any reference marks that should not will be located between bracket is configured to limitations on claims.Word " comprises " and does not excludes the presence of not
Arrange element in the claims or step.Word "a" or "an" before being positioned at element does not excludes the presence of multiple such
Element.The present invention and can come real by means of including the hardware of some different elements by means of properly programmed computer
Existing.If in the unit claim listing equipment for drying, several in these devices can be by same hardware branch
Specifically embody.Word first, second and third use do not indicate that any order.These word explanations can be run after fame
Claim.
Claims (12)
1. the audio playing apparatus for automobile, it is characterised in that including:
Signal generation module, for generating the first digital audio and video signals, and exports described first digital audio and video signals to signal
Modular converter；
Signal conversion module, is used for receiving described first digital audio and video signals, described first digital audio and video signals is converted into vapour
Car audio-frequency bus signal, and described car audio bus signals is exported to vehicle-mounted power amplifier module；
Vehicle-mounted power amplifier module, for receiving described car audio bus signals by car audio EBI, by described automobile
Audio-frequency bus signal is converted into the second digital audio and video signals, and described second digital audio and video signals is converted into simulated audio signal
Rear output is to audio playing module；
Audio playing module, is used for receiving and play described simulated audio signal.
Device the most according to claim 1, it is characterised in that described signal generation module specifically for: at audio
Adjustment method carries out audio effect processing to described first digital audio and video signals, and by defeated for the first digital audio and video signals after audio effect processing
Go out to signal conversion module.
Device the most according to claim 1, it is characterised in that described vehicle-mounted power amplifier module specifically for: at audio
Adjustment method carries out audio effect processing to described second digital audio and video signals, and is turned by the second digital audio and video signals after audio effect processing
Export to audio playing module after changing simulated audio signal into.
Device the most according to claim 1, it is characterised in that the quantity of described audio playing module is multiple and multiple
Audio playing module is connected with described signal conversion module by described vehicle-mounted power amplifier module respectively.
Device the most according to claim 1, it is characterised in that described first digital audio and video signals and described second numeral sound
Frequently signal includes audio file signal or call return path signal.
6. according to the device described in Claims 2 or 3, it is characterised in that described audio effect processing algorithm includes in following algorithm
At least one: EQ algorithm, 3D algorithm, BASS algorithm, TREBLE algorithm, surround sound algorithm, Doby sound effect algorithms, DTS calculate
Method, PCM algorithm, AC-3 algorithm, THX algorithm, SDDS algorithm and power amplification algorithm.
7. an automobile, it is characterised in that include the audio playing apparatus for automobile described in any one of claim 1-6.
8. the audio frequency playing method for automobile, it is characterised in that including:
Generate the first digital audio and video signals；
Described first digital audio and video signals is converted into car audio bus signals；
Receive described car audio bus signals by car audio EBI, described car audio bus signals is converted into
Second digital audio and video signals, and described second digital audio and video signals is converted into simulated audio signal；
Audio frequency broadcasting is carried out according to described simulated audio signal.
Method the most according to claim 8, it is characterised in that described generation the first digital audio and video signals, by described first
Digital audio and video signals is converted into the step of car audio bus signals and specifically includes: by audio effect processing algorithm to described first number
Word audio signal carries out audio effect processing, and the first digital audio and video signals after audio effect processing is converted into car audio bus letter
Number.
Method the most according to claim 8, it is characterised in that described described car audio bus signals is converted into
Two digital audio and video signals, and the step that described second digital audio and video signals is converted into simulated audio signal is specifically included: pass through
Audio effect processing algorithm carries out audio effect processing to described second digital audio and video signals, by the second DAB letter after audio effect processing
Number it is converted into simulated audio signal.
11. methods according to claim 8, it is characterised in that described first digital audio and video signals and described second numeral
Audio signal includes audio file signal or call return path signal.
12. according to the method described in claim 9 or 10, it is characterised in that described audio effect processing algorithm includes in following algorithm
At least one: EQ algorithm, 3D algorithm, BASS algorithm, TREBLE algorithm, surround sound algorithm, Doby sound effect algorithms, DTS
Algorithm, PCM algorithm, AC-3 algorithm, THX algorithm, SDDS algorithm and power amplification algorithm.
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| CN201610664275.4A CN106229002A (en) | 2016-08-12 | 2016-08-12 | A kind of audio playing apparatus for automobile, method and automobile |
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| CN111385707A (en) * | 2018-12-31 | 2020-07-07 | 深圳纽斯声学系统有限公司 | Car sound system based on flat car machine |
| CN111935599A (en) * | 2020-10-10 | 2020-11-13 | 潍坊帕萨蒂经贸有限公司 | Digital power amplifier of vehicle-mounted sound equipment |
| CN114435242A (en) * | 2022-01-28 | 2022-05-06 | 中国第一汽车股份有限公司 | Automobile digital audio output method and device and warning device |
| CN115941566A (en) * | 2021-08-16 | 2023-04-07 | 成都鼎桥通信技术有限公司 | Circuit testing method, testing board and testing system |
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| CN111385707A (en) * | 2018-12-31 | 2020-07-07 | 深圳纽斯声学系统有限公司 | Car sound system based on flat car machine |
| CN111935599A (en) * | 2020-10-10 | 2020-11-13 | 潍坊帕萨蒂经贸有限公司 | Digital power amplifier of vehicle-mounted sound equipment |
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| CN115941566A (en) * | 2021-08-16 | 2023-04-07 | 成都鼎桥通信技术有限公司 | Circuit testing method, testing board and testing system |
| CN114435242A (en) * | 2022-01-28 | 2022-05-06 | 中国第一汽车股份有限公司 | Automobile digital audio output method and device and warning device |
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Application publication date: 20161214 |