CN106331952A - Full-digital multichannel playing system and method without sound card - Google Patents
Full-digital multichannel playing system and method without sound card Download PDFInfo
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- CN106331952A CN106331952A CN201610751470.0A CN201610751470A CN106331952A CN 106331952 A CN106331952 A CN 106331952A CN 201610751470 A CN201610751470 A CN 201610751470A CN 106331952 A CN106331952 A CN 106331952A
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- pwm signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
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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
- H04R2430/00—Signal processing covered by H04R, not provided for in its groups
Abstract
The invention discloses a full-digital multichannel playing system and method without a sound card. The playing system comprises a computer control terminal and a PWM signal receiving terminal. The computer control terminal converts files in various audio formats into high-fidelity PWM files in a lossless manner; and the PWM signal receiving terminal is provided with N (which is a positive integer) ports that can work at the same time to output high levels or low levels. The computer control terminal directly transmits lossless PWM audio signals to the PWM signal receiving terminal via a network, and audio high-fidelity lossless restoration can be completed without using dedicated hardware to convert a traditional audio format into a PWM signal; and a plurality of power amplifiers can be driven at the same time by the cheap PWM signal receiving terminal to work at the same time.
Description
Technical field
The present invention relates to audio frequency play-back technology field, particularly relate to one and play without sound card multichannel based on total digitalization
System and player method.
Background technology
At present, main flow sound equipment play mode is to audio data file sound card hardware D/A conversion decoding output analog audio
Frequently signal, based on AB class or A class power amplifier.Also there is traditional D class power amplifier as shown in Figure 1, by simulated audio signal by comparing
Device conversion becomes pwm signal, carries out power amplification and filtering, and said method is that audio analog signals is carried out power amplification, exists
Non-linear distortion, intermodulation distortion etc. will cause sound to deteriorate.For solving the problem of audio distortions, as in figure 2 it is shown, Texas Instrument adopts
Realizing D/D high accuracy conversion with pure hardware circuit, utilize digital interpolation filter to filter, the bit modulators such as process is by numeral
Voice modulation becomes pwm signal.This method needs additionally to purchase hardware, power amplifier cost increases, and its precision is fixed by hardware,
Can not arbitrarily improve；Additionally can only support a D class power amplifier, owing to not supporting network, have the line of complexity during multiple stage and do not have
The basis of networking sound system deep development.
Summary of the invention
It is contemplated that at least solve technical problem present in prior art, the most innovatively propose a kind of digital
Change without sound card multichannel Play System and player method.
In order to realize the above-mentioned purpose of the present invention, according to the first aspect of the invention, the invention provides one total
Word is without sound card multichannel Play System, comprising: computer controls end, described computer controls end by all kinds of digital audio formats literary composition
Part is changed into the PWM file of at least one high-fidelity；Pwm signal receiving terminal, described pwm signal receiving terminal have N number of can simultaneously
Work, receives multichannel pwm signal and can export high level or low level port, and described N is positive integer；Described PWM believes
Number receiving terminal controls end with computer and is connected by network, and the PWM audio signal of multichannel high-fidelity is passed through net by computer control end
Network directly synchronizes, is transparently transmitted to pwm signal receiving terminal.
In the multichannel Play System of the present invention, pwm signal receiving terminal is controlled end with computer and is connected by network, and PWM believes
Number receiving terminal and computer control the distance of end can closely can also be far, it is possible to realizes online remote process；Direct by software
Digital audio file is changed into PWM file, it is to avoid the distortion of audio frequency, improves tonequality.The present invention need not high-fidelity
Pwm signal receiving terminal, it is possible to realize the lossless reduction of audio frequency, significantly reduce expense；Pwm signal receiving terminal has N number of
The output port being simultaneously operable, utilizes cheap pwm signal receiving terminal just can simultaneously drive multiple power amplifier work simultaneously
Make, can arbitrarily carry out channel expansion.The present invention thoroughly abandons hardware sound card and the pure hardware D/D conversion side of Texas Instrument's employing
Formula, computer controls end and has only to, by software, digital audio file is directly translated into high-fidelity PWM file, it becomes possible to realize height
Ensureing the broadcasting of music, equipment is simple, cost is low, autgmentability is extremely strong, and practicality is extremely strong.
In the preferred embodiment of the present invention, described computer controls end and pwm signal receiving terminal is respectively provided with network
Communication module, described network communication module realizes pwm signal by cable network or wireless network and transmits.Both can be by having had
Line connects, it is also possible to by wireless connections, both can be with short range transmission, it is also possible to long-distance transmissions.
In the another kind of preferred implementation of the present invention, computer controls end and receives digital audio format file, by difference
Digital audio format file each separate channels information is changed into corresponding each sound channel high-fidelity PWM file.Thus realize many
The broadcasting of channel stereo.
In the another kind of preferred implementation of the present invention, described computer controls end and includes DAB receiver module, shakes
Width acquisition module, amplitude interal separation module and PWM file acquisition module, wherein, described DAB receiver module end receives
Audio file also transmits to amplitude acquisition module and PWM file acquisition module；Described amplitude acquisition module obtains described numeral sound
Amplitude maximum M1 of frequency file and amplitude minimums M2, determine that the range of sounds of audio file is [-M, M], and wherein M is | M1 |
With the greater in | M2 |；Described amplitude interal separation module receives the information that amplitude acquisition module obtains, by interval [-M, M]
Being divided into n subinterval, the numerical value of interval border point represents with K0, K1, K2 ..., Kn from low to high, and wherein n is positive even numbers,
K0 to the Kn n bit code A being gradually increased1A2……AnRepresenting, wherein, binary coding corresponding for Kp is opened from left side
Beginning as p 1 and (n-p) individual 0, p is the integer of 0 to n；Described PWM file acquisition module by audio file segmentation in chronological order,
Obtain the amplitude data of different digital audio section, and judge the subinterval boundary point of its proximity, with the sub-district of described proximity
Between the PWM file of this section audio section of binary coding representation corresponding to boundary point.
The computer of the present invention controls end and directly digital audio file is changed into pwm signal, it is to avoid the distortion of audio frequency, carries
High tonequality.
In the another kind of preferred implementation of the present invention, described computer controls end and also includes digital audio decoding sub-module,
Described digital audio decoding sub-module obtains the channel information of digital audio file, different by digital audio format file according to sound channel
Divide.
In the another kind of preferred implementation of the present invention, also there is in described pwm signal receiving terminal signal output and control
Unit, different PWM files is transferred to different output ports by described signal output control unit, and multiple output ports are simultaneously
Corresponding power amplifier is driven to work.Thus realize the broadcasting of multichannel sterego.
In order to realize the above-mentioned purpose of the present invention, according to the second aspect of the invention, the invention provides one total
The player method of word multichannel Play System, it comprises the steps:
S1, computer controls end and receives digital audio file, obtains amplitude maximum M1 of described digital audio file and shake
Width minimum M 2；
S2, determines that the range of sounds of digital audio file is [-M, M], the greater during wherein M is | M1 | and | M2 |；
S3, is divided into n subinterval by interval [-M, M], the numerical value of interval border point from low to high with K0, K1,
K2 ..., Kn represent, wherein n is positive even numbers, K0 to the Kn n bit code A being gradually increased1A2……AnRepresent, its
In, it is the integer of 0 to n that binary coding corresponding for Kp starts from left side as p 1 and (n-p) individual 0, p；
S4, by digital audio file segmentation in chronological order, obtains the amplitude data of different digital audio section, and judges it
The subinterval boundary point of proximity, by this piece of digital of binary coding representation corresponding to the subinterval boundary point of described proximity
The PWM file of audio section；
S5, computer controls end and is sent by described PWM files through network to pwm signal receiving terminal, and described pwm signal receives
End has N number of being simultaneously operable, and receives multichannel pwm signal and can export high level or low level port, and described N is just
Integer；
S6, N number of output port of pwm signal receiving terminal drives corresponding power amplifier to work in whole or in part.
The player method of the present invention by being directly translated into the PWM file of fine definition by digital audio file, it is to avoid
The distortion of audio frequency, improves tonequality；Need not the pwm signal receiving terminal of high-fidelity, it is possible to realize the lossless of DAB and go back
Former, significantly reduce expense；Pwm signal receiving terminal has N number of output port being simultaneously operable, and utilizes cheap
Pwm signal receiving terminal just can simultaneously drive multiple power amplifier and work simultaneously, can arbitrarily carry out channel expansion.
In the preferred embodiment of the present invention, described computer controls end by PWM corresponding for different digital audio section
The transparent transmission of file synchronization.There is the widely suitability.
The additional aspect of the present invention and advantage will part be given in the following description, and part will become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or the additional aspect of the present invention and advantage are from combining the accompanying drawings below description to embodiment and will become
Substantially with easy to understand, wherein:
Fig. 1 is existing traditional a kind of sound equipment play mode；
Fig. 2 is the sound equipment play mode of Texas Instrument；
Fig. 3 is the network architecture schematic diagram of total digitalization multichannel Play System of the present invention；
Fig. 4 is the structural representation of total digitalization multichannel Play System of the present invention.
Detailed description of the invention
Embodiments of the invention are described below in detail, and the example of described embodiment is shown in the drawings, the most from start to finish
Same or similar label represents same or similar element or has the element of same or like function.Below with reference to attached
The embodiment that figure describes is exemplary, is only used for explaining the present invention, and is not considered as limiting the invention.
In describing the invention, unless otherwise prescribed and limit, it should be noted that term " is installed ", " being connected ",
" connect " and should be interpreted broadly, for example, it may be mechanically connected or electrical connection, it is also possible to be the connection of two element internals, can
Being to be joined directly together, it is also possible to be indirectly connected to by intermediary, for the ordinary skill in the art, can basis
Concrete condition understands the concrete meaning of above-mentioned term.
The invention provides a kind of totally digitilized without sound card multichannel Play System, as shown in Figure 3 and Figure 4, comprising: electric
Brain controls end, and described computer controls end and all kinds of digital audio format files are changed into the PWM file of at least one high-fidelity.Should
Play System also includes pwm signal receiving terminal, and this pwm signal receiving terminal has and N number of be simultaneously operable and can export high level
Or low level port, described N is positive integer, and pwm signal receiving terminal controls end with computer and is connected by network, computer control end
The PWM audio signal of all of high-fidelity is transferred directly to pwm signal receiving terminal by network.
In the multichannel Play System of the present invention, pwm signal receiving terminal is controlled end with computer and is connected by network, and PWM believes
Number receiving terminal and computer control the distance of end can closely can also be far, it is possible to realizes online remote process；Fully utilized software
Digital audio file is changed into the PWM file of high-fidelity, it is to avoid the audio distortion that hardware brings, improves tonequality, simultaneously
Providing cost savings, the present invention exports the PWM file of fine definition, it is not necessary to the pwm signal receiving terminal of high-fidelity, it is possible to realize
The recovery of audio frequency, reduces expense；Pwm signal receiving terminal has N number of output port being simultaneously operable, and utilizes cheap
Pwm signal receiving terminal just simultaneously or timesharing drives the work of multiple power amplifiers can arbitrarily carry out channel expansion, and the present invention can pass through
TCP, udp protocol realize the transparent transmission of PWM audio signal, improve efficiency, reduce expense, have promoted the suitability.
In the present embodiment, computer controls end and pwm signal receiving terminal is respectively provided with network communication module, network service mould
Block realizes pwm signal by cable network or wireless network and transmits.Both wired connection can have been passed through, it is also possible to by wireless company
Connect, both can be with short range transmission, it is also possible to long-distance transmissions.
In the present embodiment, computer controls end reception digital audio format file, by different digital audio format file
Each separate channels information is changed into corresponding each sound channel high-fidelity PWM file.Thus realize the broadcasting of multichannel sterego.
Specifically can control end at computer and arrange digital audio decoding sub-module, digital audio decoding sub-module obtains the sound of digital audio file
Road information, divides digital audio format file according to sound channel difference.
In the present embodiment, computer control end also includes that DAB receiver module, amplitude acquisition module, amplitude are interval
Segmentation module and PWM file acquisition module, wherein, DAB receiver module termination radio reception frequency file also transmits to amplitude acquisition
Module and PWM file acquisition module.If multi-sound channel digital audio file or need to be divided into the audio file of multichannel,
Digital audio decoding sub-module can be utilized to be divided by digital audio format file.Amplitude acquisition module obtains DAB literary composition
Amplitude maximum M1 of part and amplitude minimums M2 (if being divided into multiple DAB subfile, are all numerals here
Amplitude maximum M1 of audio frequency subfile and amplitude minimums M2), determine that the range of sounds of digital audio file is [-M, M], its
Middle M is the greater in | M1 | and | M2 |.Amplitude interal separation module receive amplitude acquisition module obtain information, by interval [-
M, M] it is divided into n subinterval, the numerical value of interval border point represents with K0, K1, K2 ..., Kn from low to high, and wherein n is just
Even number, K0 to the Kn n bit code A being gradually increased1A2……AnRepresenting, wherein, binary coding corresponding for Kp is from a left side
It is the integer of 0 to n that side starts as p 1 and (n-p) individual 0, p；Described PWM file acquisition module is by audio file in chronological order
Segmentation, obtains the amplitude data of not audio segments, and judges the subinterval boundary point of its proximity, with the limit, subinterval of proximity
The PWM file of this section audio section of binary coding representation corresponding to boundary's point.The computer of the present invention controls end directly by audio frequency literary composition
Part is changed into pwm signal, it is to avoid the distortion of audio frequency, improves tonequality.
The technical scheme below digital audio file in the present invention being changed into PWM file is illustrated, concrete numerical value
It is just to understanding the present invention rather than limitation of the present invention, such as, is first turned on a WAV audio file.Then look for
Go out digital audio file correspondence minimum amplitude and peak swing, it is assumed that minimum amplitude be-7298, peak swing is 8000.Make
Determine that sound is in the range of (-8000,8000) by peak swing and minimum amplitude.Interval (-8000,8000) are divided into 16
Individual subinterval, and the border in subinterval is represented with a string binary code, such as
+ 8000 are expressed as 1111111111111111；
+ 7000 are expressed as 1111111111111110；
+ 6000 are expressed as 1111111111111100；
+ 5000 are expressed as 1111111111111000；
+ 4000 are expressed as 1111111111110000；
+ 3000 are expressed as 1111111111100000；
+ 2000 are expressed as 1111111111000000；
+ 1000 are expressed as 1111111110000000；
0000 is expressed as 1111111100000000；
-1000 are expressed as 1111111000000000；
-2000 are expressed as 1111110000000000；
-3000 are expressed as 1111100000000000；
-4000 are expressed as 1111000000000000；
-5000 are expressed as 1110000000000000；
-6000 are expressed as 1100000000000000；
-7000 are expressed as 1000000000000000；
-8000 are expressed as 0000000000000000.
By audio file segmentation in chronological order, if the amplitude of a certain section audio file is+6000, then use
1111111111111100 represent its PWM value, if the amplitude of a certain section audio file is+6100, also use
1111111111111100 represent its PWM value because it close+6100；If the amplitude of a certain section audio file is+6900,
Then represent its PWM value with 1111111111111110, because+6900 closer to+7000.
In time domain, if recipient receives 1111111111111100, it should open output 14 times, be then powered off two
Secondary.The time length of each " opening " or " closedown " is to be determined by the subinterval quantity of audio file.PWM value can also be stored in
In hard disk, for playback later.
Although it should be noted that along with the subinterval number change of audio file, each in time domain " opening " or " pass
Close " time length also can change, however, to ensure that the high-fidelity of audio frequency, in the present embodiment, when audio frequency is play
Between fixing, when the subinterval quantity of audio file becomes many, the time domain length in each subinterval reduces accordingly, and each " is opened "
Or the time of " closedown " also shorter.
In the present embodiment, N number of output port of pwm signal receiving terminal simultaneously drives corresponding power amplifier to work,
Also having signal output control unit in pwm signal receiving terminal, same PWM file can be transmitted by signal output control unit
To different output ports, it is also possible to the most different PWM files is transferred to different output ports, multiple output ports are simultaneously
Corresponding power amplifier is driven to work, it is achieved the broadcasting of audio frequency.Such as, some digital audio file is divided according to frequency or sound channel
It is 8 parts PWM1, PWM2 ..., PWM8,16 output ports drive 8 D class power amplifiers, and 16 output ports two group are same
Time export a part of pwm signal, export PWM1, PWM2 from pin D0 to D15 simultaneously ..., PWM8, when specifically playing, N number of defeated
Going out port simultaneously drives corresponding power amplifier to work, thus realizes the broadcasting of audio frequency.
The invention provides the player method of a kind of total digitalization multichannel Play System, it comprises the steps:
S1, computer controls termination radio reception frequency file, obtains amplitude maximum M1 and the amplitude minimums of described audio file
M2；
S2, determines that the range of sounds of audio file is [-M, M], the greater during wherein M is | M1 | and | M2 |；
S3, is divided into n subinterval by interval [-M, M], the numerical value of interval border point from low to high with K0, K1,
K2 ..., Kn represent, wherein n is positive even numbers, K0 to the Kn n bit code A being gradually increased1A2……AnRepresent, its
In, it is the integer of 0 to n that binary coding corresponding for Kp starts from left side as p 1 and (n-p) individual 0, p；
S4, by audio file segmentation in chronological order, obtain the amplitude data of not audio segments, and judges its proximity
Subinterval boundary point, with the PWM of this section audio section of binary coding representation corresponding to the subinterval boundary point of described proximity
File；
S5, computer controls end and sends described PWM files through network to pwm signal receiving terminal,
Pwm signal receiving terminal has N number of being simultaneously operable, and receives multichannel pwm signal and can export high level or low
The port of level, described N is positive integer；
S6, N number of output port of pwm signal receiving terminal simultaneously drives the work of corresponding power amplifier.
The player method of the present invention by being directly translated into the PWM file of fine definition by digital audio file, by increasing
Add the interval quantity of division, it is possible to obtain the PWM file of fine definition, it is to avoid the distortion of audio frequency, improve tonequality；High-resolution
The PWM file of degree need not the pwm signal receiving terminal of high-fidelity, it is possible to realizes the recovery of audio frequency, greatly reduces expense；
Pwm signal receiving terminal has N number of output port being simultaneously operable, and utilizes the cheap pwm signal receiving terminal just can be with
Time drive multiple power amplifier to work simultaneously, can arbitrarily carry out channel expansion.
In the present embodiment, computer controls end by the transparent transmission of PWM file synchronization corresponding for different digital audio section.Have
The widely suitability.
Receiving terminal of the present invention and power amplifier end are perfect hardware combinations, it is achieved total digitalization high-fidelity broadcast unit, use
Convenient and swift and the most cheap.
It should be noted that scope interval in the present invention and segmentation are merely illustrative, the interval divided by increase
Quantity, it is possible to improving pwm signal high fidelity further, the concrete interval quantity divided can be according to concrete pwm signal receiving terminal
The requirement of definition determines.In the present embodiment, concrete pwm signal receiving terminal can be common single-chip microcomputer and peripheral communications mould
Block is constituted.
Compared with prior art, the present invention also have employing integrated distribution formula network, complete digital PWM lossless, cheap,
Easy to operate, can with existing equipment matched well, quick for installation, facilitate the advantages such as later stage audio design.
Computer of the present invention controls end and by network, lossless PWM audio signal is transferred directly to pwm signal receiving terminal,
Without specialized hardware, conventional audio form is converted into pwm signal and just can complete the lossless reduction of audio frequency high-fidelity；Utilize cheap
Pwm signal receiving terminal just can simultaneously drive multiple D class power amplifier and work simultaneously.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " specifically show
Example " or the description of " some examples " etc. means to combine this embodiment or example describes specific features, structure, material or spy
Point is contained at least one embodiment or the example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Necessarily refer to identical embodiment or example.And, the specific features of description, structure, material or feature can be any
One or more embodiments or example in combine in an appropriate manner.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that: not
These embodiments can be carried out multiple change in the case of departing from the principle of the present invention and objective, revise, replace and modification, this
The scope of invention is limited by claim and equivalent thereof.
Claims (10)
1. a total digitalization is without sound card multichannel Play System, it is characterised in that including:
Computer controls end, and described computer controls end and all kinds of digital audio format files are changed at least one PWM of high-fidelity
File；
Pwm signal receiving terminal, described pwm signal receiving terminal has and N number of be simultaneously operable and can export high level or low level
Port, described N is positive integer；
Described pwm signal receiving terminal is controlled end with computer and is connected by network, and computer controls end by the PWM audio frequency of all high-fidelities
Signal is transferred directly to pwm signal receiving terminal by network.
Total digitalization the most according to claim 1 is without sound card multichannel Play System, it is characterised in that described computer controls
End and pwm signal receiving terminal are respectively provided with network communication module, and described network communication module passes through cable network or wireless network
Realize pwm signal transmission.
Total digitalization the most according to claim 1 is without sound card multichannel Play System, it is characterised in that described computer controls
End receive digital audio format file, each for different digital audio format file separate channels information is changed into corresponding respectively
Sound channel high-fidelity PWM file.
Total digitalization the most according to claim 1 is without sound card multichannel Play System, it is characterised in that described computer controls
Hold and include DAB receiver module, amplitude acquisition module, amplitude interal separation module and PWM file acquisition module, wherein,
Described audio frequency receiver module end receives digital audio file and transmits to amplitude acquisition module and PWM file acquisition module；
Described amplitude acquisition module obtains amplitude maximum M1 and the amplitude minimums M2 of described digital audio file, determines numeral
The range of sounds of audio file is [-M, M], the greater during wherein M is | M1 | and | M2 |；
Described amplitude interal separation module receives the information that amplitude acquisition module obtains, and interval [-M, M] is divided into n Ge Zi district
Between, the numerical value of interval border point represents with K0, K1, K2 ..., Kn from low to high, and wherein n is positive even numbers, and K0 to Kn is with gradually
The n bit code A increased1A2……AnRepresenting, wherein, binary coding corresponding for Kp starts from left side as p 1 and (n-
P) individual 0, p are the integer of 0 to n；
Described PWM file acquisition module, by digital audio file segmentation in chronological order, obtains the amplitude data of not audio segments,
And judge the subinterval boundary point of its proximity, with the binary coding representation corresponding to the subinterval boundary point of described proximity
The PWM file of this section audio section.
Total digitalization the most according to claim 1 is without sound card multichannel Play System, it is characterised in that described computer controls
End also includes digital audio decoding sub-module, and described digital audio decoding sub-module obtains digital audio file channel information, according to sound
Digital audio format file is divided by road difference.
6. according to the total digitalization described in claim 1 or 3 without sound card multichannel Play System, it is characterised in that described PWM believes
Also having signal output control unit in number receiving terminal, different PWM files is transferred to not by described signal output control unit
Same output port, multiple output ports simultaneously drive the work of corresponding power amplifier.
7. utilize total digitalization described in claim 1 without the player method of sound card multichannel Play System, it is characterised in that to include
Following steps:
S1, computer controls end and receives digital audio file, obtains amplitude maximum M1 of described digital audio file and amplitude
Little value M2；
S2, determines that the range of sounds of digital audio file is [-M, M], the greater during wherein M is | M1 | and | M2 |；
S3, is divided into n subinterval by interval [-M, M], and the numerical value of interval border point is from low to high with K0, K1, K2 ..., Kn
Representing, wherein n is positive even numbers, K0 to the Kn n bit code A being gradually increased1A2……AnRepresenting, wherein, Kp is corresponding
It is the integer of 0 to n that binary coding starts from left side as p 1 and (n-p) individual 0, p；
S4, by digital audio file segmentation in chronological order, obtains the amplitude data of different digital audio section, and judges that it is nearest
The subinterval boundary point connect, by this section audio section of binary coding representation corresponding to the subinterval boundary point of described proximity
PWM file；
S5, computer controls end and is sent by described PWM files through network to pwm signal receiving terminal, and described pwm signal receiving terminal has
Having and N number of be simultaneously operable, receive multichannel pwm signal and can export high level or low level port, described N is the most whole
Number；
S6, N number of output port of pwm signal receiving terminal simultaneously drives corresponding power amplifier to work.
Player method the most according to claim 7, it is characterised in that in described step S6, when PWM file is multiple
Time, different PWM files is transferred to the different output ports of pwm signal receiving terminal, multiple outputs by signal output control unit
Port simultaneously drives the work of corresponding power amplifier.
Player method the most according to claim 7, it is characterised in that described computer controls end and pwm signal receiving terminal is equal
Having network communication module, described network communication module realizes pwm signal by cable network or wireless network and transmits.
Player method the most according to claim 7, it is characterised in that described computer controls end by different digital audio section
The corresponding transparent transmission of PWM file synchronization.
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| CN108513223A (en) * | 2018-03-19 | 2018-09-07 | 成都星环科技有限公司 | A kind of multichannel Lossless transport system |
| CN109991018A (en) * | 2019-05-05 | 2019-07-09 | 中国汽车工程研究院股份有限公司 | A kind of driver's multisensor coupling automatic driving vehicle discloses road test method |
| CN110082123A (en) * | 2019-05-05 | 2019-08-02 | 中国汽车工程研究院股份有限公司 | A kind of automatic Pilot automatization test system |
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