CN206226695U - The system and transmission equipment and receiving device of audio signal - Google Patents
The system and transmission equipment and receiving device of audio signal Download PDFInfo
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- CN206226695U CN206226695U CN201621174907.0U CN201621174907U CN206226695U CN 206226695 U CN206226695 U CN 206226695U CN 201621174907 U CN201621174907 U CN 201621174907U CN 206226695 U CN206226695 U CN 206226695U
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Abstract
The utility model discloses the system and transmission equipment and receiving device of a kind of audio signal.Wherein, the system includes：Audio-source, for gathering the first audio signal waiting for transmission；Transmission equipment, is connected with audio-source, for processing the first audio signal, obtains packets of audio data, wherein, packets of audio data at least includes：The physical address of the first audio signal and receiving device；Receiving device, is connected, with the equipment of transmission by netting twine for receiving packets of audio data.The processing system configuration that the utility model solves audio signal of the prior art is complicated, it is impossible to accomplish the technical problem of plug and play.
Description
Technical field
The utility model is related to Audio Signal Processing field, system and transmission in particular to a kind of audio signal
Equipment and receiving device.
Background technology
It is frequently necessary to for audio signal to pass to console in the scenes such as concert and is processed, current traditional solution
Scheme has two kinds：
The first is to carry out audio signal transmission by artificial line, because artificial line is not easy to obtain, if project does not have
Preparing enough wire rods needs interim purchase, and in the market is relatively difficult to buy suitable wire rod, and difficulty is brought to construction.In addition
On the one hand, artificial line is easily disturbed, and once interference is introduced, it is impossible to completely filtered.
Second is to carry out audio signal transmission by Ethernet, has on the market transmit audio signal by Ethernet at present
Solution, but most variations time delay is than larger, and configuration is complicated, it is impossible to accomplish plug and play.
Processing system for audio signal of the prior art configures complicated, it is impossible to accomplish the problem of plug and play, mesh
It is preceding not yet to propose effective solution.
Utility model content
The utility model embodiment provides a kind of system of audio signal and sends equipment and receiving device, at least to solve
The processing system configuration of audio signal certainly of the prior art is complicated, it is impossible to accomplish the technical problem of plug and play.
According to the one side of the utility model embodiment, there is provided a kind of processing system of audio signal, including：Audio
Source, for gathering the first audio signal waiting for transmission；Transmission equipment, is connected with audio-source, for being carried out to the first audio signal
Treatment, obtains packets of audio data, wherein, packets of audio data at least includes：The physical address of the first audio signal and receiving device；
Receiving device, is connected, with the equipment of transmission by netting twine for receiving packets of audio data.
Further, transmission equipment includes：Digital analog converter, for carrying out analog-to-digital conversion to the first audio signal, obtains
Second audio signal, wherein, the first audio signal is the audio signal waiting for transmission collected from audio-source, the first audio signal
It is analog signal, the second audio signal is data signal；Processor, is connected with digital analog converter, right for according to preset format
First audio signal enters row format conversion, obtains voice data；Ethernet controller, is connected with processor, for according to default
Agreement, is processed voice data, obtains packets of audio data, and send packets of audio data.
Further, receiving device is additionally operable to process packets of audio data, obtains the first audio signal；System is also wrapped
Include：Audio output unit, is connected with receiving device, for exporting the first audio signal.
Further, receiving device includes：Ethernet controller, for according to preset protocol, being carried out to packets of audio data
Treatment, obtains voice data；Processor, is connected with ethernet controller, for according to preset format, lattice being carried out to voice data
Formula is changed, and obtains the second audio signal；Digital analog converter, is connected with processor, turns for carrying out digital-to-analogue to the second audio signal
Change, obtain the first audio signal.
Further, processor includes：First interface, the first end of first interface is connected with digital analog converter；At first
Reason unit, is connected with the second end of first interface；Two second interfaces, first end and the processing unit of each second interface connect
Connect, the second end of each second interface is connected with ethernet controller.
Further, processor also includes：3rd interface, for receiving the key state information of outside input, and drives
LED is shown；Two second interfaces are additionally operable to output key status information.
Further, processor also includes：4th interface, is connected with controller, the control for receiving controller output
Parameter, wherein, control parameter at least includes：The transmission form of physical address, the form that sends is following one kind：Unicast fashion and wide
Broadcast form.
Further, processor is FPGA.
Further, ethernet controller includes：Second processing unit, for processing voice data, obtains sound
Frequency packet, or packets of audio data is processed, obtain voice data；5th interface, is connected with second processing unit, is used for
Output packets of audio data receives packets of audio data.
Further, the model DM9000 of ethernet controller.
Further, the 5th interface is the RJ45 interfaces for carrying transformer.
Further, the model CS5368 or CS4382 of digital analog converter.
According to the another aspect of the utility model embodiment, a kind of transmission equipment of audio signal is additionally provided, including：Number
Weighted-voltage D/A converter, is connected with audio-source, for carrying out analog-to-digital conversion to the first audio signal for getting, obtains the second audio letter
Number, wherein, the first audio signal is the audio signal waiting for transmission collected from audio-source, and the first audio signal is believed for simulation
Number, the second audio signal is data signal；Processor, is connected with digital analog converter, for according to preset format, to the first audio
Signal enters row format conversion, obtains voice data；Ethernet controller, is connected, with processor and receiving device for pressing respectively
According to preset protocol, voice data is processed, obtain packets of audio data, and send packets of audio data.
According to the another aspect of the utility model embodiment, a kind of receiving device of audio signal is additionally provided, including：With
Too net controller, is connected, with the equipment of transmission for according to preset protocol, the packets of audio data to receiving to be processed, obtained
Voice data；Processor, is connected with ethernet controller, for according to preset format, entering row format conversion to voice data, obtains
To the second audio signal；Digital analog converter, is connected with processor and audio output unit respectively, for entering to the second audio signal
Row digital-to-analogue conversion, obtains the first audio signal, and exports the first audio signal, wherein, the first audio signal is analog signal, the
Two audio signals are data signal.
In the utility model embodiment, send equipment and obtain the first audio signal, the first audio signal is processed,
Packets of audio data is obtained, packets of audio data is sent to receiving device, so as to realize the mesh to treatment and the transmission of audio signal
's.It is easily noted that, the physical address of receiving device is included in packets of audio data, that is, sends equipment and receiving device fortune
Row is in MAC layer, it is not necessary to IP address, can be with plug and play, so as to solve the processing system of audio signal of the prior art
Configuration is complicated, it is impossible to accomplish the technical problem of plug and play.Therefore, the scheme for being provided by the utility model above-described embodiment,
Can reach similar to artificial line in use habit, can be with the effect of plug and play.
Brief description of the drawings
Accompanying drawing described herein is used for providing being further understood to of the present utility model, constitutes the part of the application,
Schematic description and description of the present utility model is used to explain the utility model, does not constitute to of the present utility model improper
Limit.In the accompanying drawings：
Fig. 1 is a kind of schematic diagram of the processing system of the audio signal according to the utility model embodiment；
Fig. 2 is the schematic diagram of the processing system of a kind of optional audio signal according to the utility model embodiment；
Fig. 3 is the schematic diagram of a kind of optional processor according to the utility model embodiment；
Fig. 4 is showing for the processing system according to a kind of optional Ethernet of the utility model embodiment transmission audio signal
It is intended to；
Fig. 5 is the schematic diagram of the external interface of a kind of optional FPGA according to the utility model embodiment；
Fig. 6 is the clock of a kind of optional FPGA according to the utility model embodiment, is resetted, button, display interface
The schematic diagram of interface signal；
Fig. 7 is the schematic diagram of the interface signal of the I2S interfaces of a kind of optional FPGA according to the utility model embodiment；
Fig. 8 is the interface signal of the Eth0 Ethernet interfaces of a kind of optional FPGA according to the utility model embodiment
Schematic diagram；
Fig. 9 is the interface signal of the Eth1 Ethernet interfaces of a kind of optional FPGA according to the utility model embodiment
Schematic diagram；
Figure 10 is showing for the interface signal of the MCU_SPI interfaces of a kind of optional FPGA according to the utility model embodiment
It is intended to；
Figure 11 is a kind of schematic diagram of the transmission equipment of the audio signal according to the utility model embodiment；And
Figure 12 is a kind of schematic diagram of the receiving device of the audio signal according to the utility model embodiment.
Specific embodiment
In order that those skilled in the art more fully understand the utility model scheme, below in conjunction with the utility model reality
The accompanying drawing in example is applied, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that described
Embodiment is only the embodiment of the utility model part, rather than whole embodiments.Based on the reality in the utility model
Example is applied, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made all should
When the scope for belonging to the utility model protection.
It should be noted that term " first " in specification and claims of the present utility model and above-mentioned accompanying drawing,
" second " etc. is for distinguishing similar object, without for describing specific order or precedence.It should be appreciated that so
The data for using can be exchanged in the appropriate case, so that embodiment of the present utility model described herein can be with except at this
In diagram or description those beyond order implement.Additionally, term " comprising " and " having " and their any deformation, meaning
Figure is that covering is non-exclusive to be included, for example, contain a series of system of units, product or equipment to be not necessarily limited to clearly arrange
Those units for going out, but may include other units do not list clearly or intrinsic for these products or equipment.
Embodiment 1
According to the utility model embodiment, there is provided a kind of embodiment of the processing system of audio signal.
Fig. 1 is a kind of schematic diagram of the processing system of the audio signal according to the utility model embodiment, as shown in figure 1,
The system includes：
Audio-source 11, for gathering the first audio signal waiting for transmission.
Specifically, above-mentioned audio-source can be 8 tunnels simulation source of sound, 8 road simulated audio signals are exported；The first above-mentioned sound
Frequency signal can be the simulated audio signal on 8 tunnels.
Transmission equipment 13, is connected with audio-source, for processing the first audio signal, obtains packets of audio data, its
In, packets of audio data at least includes：The physical address of the first audio signal and receiving device.
Specifically, above-mentioned transmission equipment can be device A E8 (the Audio to that audio signal is passed through into Ethernet output
The abbreviation of Ethernet 8channels), above-mentioned physical address can be the MAC Address of receiving device, that is, send equipment fortune
Row is in MAC layer.
Receiving device 15, is connected, with the equipment of transmission by netting twine for receiving packets of audio data.
Specifically, above-mentioned receiving device can be the equipment EA8 that the packets of audio data that AE8 sends is received by Ethernet
(Ethernet to Audio 8channels' writes a Chinese character in simplified form), AE8 and EA8 is the two ends of ethernet communication, can be entered by netting twine
Row connection, receiving device also operates in MAC layer.
In a kind of optional scheme, by taking concert scene as an example, can collect what singer sent by microphone
Voice, and the simulated audio signal on 8 tunnels is exported to AE8, AE8 is responsible for for the simulated audio signal on 8 tunnels being packaged into Ethernet data
Bag (i.e. above-mentioned packets of audio data), Ethernet data bag is sent to the EA8 of distal end by netting twine, and EA8 can be from Ethernet
On collect Ethernet data bag.Specifically, AE8 is after the simulated audio signal for getting 8 tunnels, can be according to the MAC of EA8 ground
Location, the simulated audio signal to 8 tunnels is packed, and realizes the data processing of the MAC layer of transmission equipment, obtains being ultimately sent to connect
The packets of audio data of receiving unit.
By the utility model above-described embodiment, send equipment and obtain the first audio signal, the first audio signal is carried out
Treatment, obtains packets of audio data, packets of audio data is sent to receiving device, so as to realize the treatment and transmission to audio signal
Purpose.It is easily noted that, the physical address of receiving device is included in packets of audio data, that is, sends equipment and reception sets
It is standby to operate in MAC layer, it is not necessary to IP address, can be with plug and play, so as to solve the treatment of audio signal of the prior art
System configuration is complicated, it is impossible to accomplish the technical problem of plug and play.Therefore, the side for being provided by the utility model above-described embodiment
Case, can reach similar to artificial line in use habit, can be with the effect of plug and play.
Optionally, in the utility model above-described embodiment, as described in Figure 2, transmission equipment 13 includes：
Digital analog converter 131, for carrying out analog-to-digital conversion to the first audio signal, obtains the second audio signal, wherein, the
One audio signal is the audio signal waiting for transmission collected from audio-source, and the first audio signal is analog signal, the second audio
Signal is data signal.
Optionally, in the utility model above-described embodiment, the model CS5368 of digital analog converter.
Processor 133, is connected with digital analog converter, turns for according to preset format, entering row format to the first audio signal
Change, obtain voice data.
Optionally, in the utility model above-described embodiment, processor is FPGA.
Specifically, above-mentioned preset format can be I2S forms (Inter-IC Sound, integrated circuit built-in audio),
Be between digital audio-frequency apparatus voice data transmission and formulate transmission standard, in the utility model above-described embodiment, with
I2S parameters are：As a example by the sample rate of 48K and the sampling precision of 24bit, illustrate.
Ethernet controller 135, is connected with processor, for according to preset protocol, processing voice data, obtains
Packets of audio data, and send packets of audio data.
Optionally, in the utility model above-described embodiment, the model DM9000 of ethernet controller.
Specifically, the MAC Address due to including receiving device in packets of audio data, above-mentioned preset protocol can be
Mac-layer protocol.
Optionally, in the utility model above-described embodiment, send equipment in units of frame, at voice data
Reason.
Herein it should be noted that AE8 and EA8 are two pieces of independent veneers, although they are using the crystal oscillator of 12.288M
As the clock source of AD conversion unit (AD/DA), but, the frequency of the two crystal oscillators can not possibly be identical, between them
Necessarily there is certain difference, the size of this difference depends on the precision of crystal oscillator, wherein, the crystal oscillator precision used in audio is general
It is tens PPM (hundred a ten thousandths, Part Per Million's writes a Chinese character in simplified form).Two differences of crystal oscillator frequency can cause in communication
" slip ", solving the mode of this " slip " typically has control crystal oscillator frequency of oscillation so as to repair " slip ", or increases slow
The time that area is rushed to increase slip to cause and overflow, but each way has its respective advantage and disadvantage, than if any the frequency that causes shake
Swing fluctuation to increase, the communication delay that causes having is increased.Because the processing system that the utility model is provided is especially sensitive to time delay, institute
Can be made a call to by the way of an Ethernet data bag using a frame voice data, the delay of now Ethernet data bag deblocking is about
It is 2 frame data=2*1/48000=40us, wherein, the buffering area of voice data is not provided with receiving device.Without buffering
In the case of area, the probability that slip occurs can increase, but influence when there is slip to tonequality is very small, if receiving device
Crystal oscillator is faster than transmitting terminal, and receiving device can't wait the audio signal of transmission equipment, then the last audio of receiving device replay
Signal；If the clock ratio of receiving device sends, equipment is slow, receiving device is received from transmission equipment when slip occurs one
Individual audio signal is possible to also not using being just capped.
In a kind of optional scheme, AE8 mainly by the AD conversion unit (i.e. above-mentioned digital analog converter) of audio,
FPGA core core (i.e. above-mentioned processor) and Ethernet protocol processing unit (i.e. above-mentioned ethernet controller) are constituted, audio
Signal is from audio-source Audio to Ethernet Ethernet.The core devices of the AD conversion unit of audio are CS5368, main work(
Can be that the input source of sound (analog signal) on 8 tunnels is AD converted, pick up the audio signal of simulation and be converted to the audio of numeral
Signal is to FPGA；The major function of FPGA core core is to complete the digital audio and video signals of CS5368 outputs to the Ethernet of DM9000
Docking between packet, management configuration CS5368/DM9000 etc., human/machine control interfaces, display interface etc., are whole projects
Core cell；The main devices of Ethernet protocol processing unit are DM9000, and the voice data that the part exports FPGA is carried
It is transmitted on to Ethernet, packets of audio data is transmitted to EA8 equipment eventually through ethernet line.
By such scheme, transmission equipment can carry out analog-to-digital conversion to the first audio signal, obtain the second audio signal,
According to preset format, row format conversion is entered to the first audio signal, obtain voice data, and according to preset protocol, to audio number
According to being processed, packets of audio data is obtained, so that realize for simulated audio signal being converted to digital audio and video signals, and by MAC
Layer is processed, and is transmitted by Ethernet netting twine, is difficult to be disturbed in transmitting procedure, and use habit is similar to artificial line,
Configuration is convenient, with plug and play, and can reduce influence of the slip to audio signal.
Optionally, in the utility model above-described embodiment, receiving device is additionally operable to process packets of audio data, obtains
To the first audio signal, as shown in Fig. 2 said system also includes：Audio output unit 21, is connected with receiving device, for defeated
Go out the first audio signal.
In a kind of optional scheme, EA8 equipment is responsible for collecting Ethernet data bag from Ethernet, can receive
The Ethernet data bag that AE8 sends, and Ethernet data bag is unpacked, 8 original road simulated audio signals are obtained, drive
The audio output unit playing audio signal such as audio amplifier, so as to realize that audio signal is sent into far-end audio by netting twine exports single
Unit.
Optionally, in the utility model above-described embodiment, as shown in Fig. 2 receiving device 15 includes：
Ethernet controller 135, for according to preset protocol, processing packets of audio data, obtains voice data.
Optionally, in the utility model above-described embodiment, the model DM9000 of ethernet controller.
Processor 133, is connected with ethernet controller, for according to preset format, entering row format conversion to voice data,
Obtain the second audio signal.
Optionally, in the utility model above-described embodiment, processor is FPGA.
Digital analog converter 131, is connected with processor, for carrying out digital-to-analogue conversion to the second audio signal, obtains the first sound
Frequency signal.
Optionally, in the utility model above-described embodiment, the model CS4382 of digital analog converter.
In a kind of optional scheme, EA8 mainly by Ethernet protocol processing unit (i.e. above-mentioned ethernet controller),
The AD conversion unit (i.e. above-mentioned digital analog converter) of FPGA core core (i.e. above-mentioned processor) and audio is constituted, audio letter
Number flow direction and AE8 just conversely, from Ethernet Ethernet to audio-source Audio.Ethernet protocol processing unit it is main
Device is DM9000, and the part receives VoP from Ethernet, is transmitted to FPGA treatment；The main work(of FPGA core core
Can be the Ethernet data bag for completing DM9000 to the docking between CS4382, management configuration CS4382/DM9000 etc., man-machine control
Interface processed, display interface etc., are the core cells of whole project；The core devices of the D/A conversion unit of audio are CS4382,
Major function is that the digital audio and video signals on 8 tunnels are converted to analog signal by DA, is used to drive phonation unit to export audio.
Herein it should be noted that in the processing procedure of audio signal, it is that process is reciprocal to send equipment and receiving device
Two equipment, two equipment all include AD conversion unit, FPGA and Ethernet protocol processing unit, are sending device A E8
In, the flow direction of audio signal is that, from audio-source to Ethernet, and in receiving device EA8, the flow direction of audio signal is from ether
Net is to audio output unit.
In another optional scheme, in order to solve the problems, such as two slips of free oscillation crystal oscillator, in the utility model
Method that can also be using being cached using FIFO, EA8, can be with after each the Ethernet data bag that will be received is unpacked
It is stored in FIFO, if the clock cycle for reading FIFO is slower than the clock cycle write, the voice data deposited in FIFO can tire out
Product, when the voice data accumulation deposited in FIFO is to certain depth, the FPGA inside EA8 can be judged, and taken and lost
The measure of bag.
By such scheme, be stored in the first audio signal in buffer queue by receiving device, and from buffer queue successively
The first audio signal is read, so as to greatly reduce the probability of slip generation.
Optionally, in the utility model above-described embodiment, as shown in figure 3, processor 133 includes：
First interface 31, the first end of first interface is connected with digital analog converter 131.
Specifically, above-mentioned first interface can be the I2S interfaces (AE8/EA8) of FPGA, I2S interfaces (AE8/EA8) branch
Hold modulus or the digital-to-analogue conversion (way of support depends on the specification of AD/DA chips) on 8 tunnels.
First processing units 33, are connected with the second end of first interface.
Specifically, above-mentioned first processing units can be the processing unit inside FPGA.
Two second interfaces 35, the first end of each second interface is connected with processing unit, and the second of each second interface
End is connected with ethernet controller 135.
Specifically, two above-mentioned second interfaces can be Ethernet interface Eth_0 and Eth_1.
In a kind of optional scheme, for AE8, the voice data that I2S interfaces CS5368 sends passes through
Internal bus is exported to Ethernet protocol processing unit from Ethernet interface Eth0 and Eth1, is realized local I2S voice datas
To the function that Ethernet sends；For EA8, will can be received from Ethernet interface Eth0 or Eth1 by the I2S interfaces
Data is activation to the CS4382 audio DA chips on plate, digital-to-analogue conversion is completed so as to drive audio output unit by CS4382,
So as to realize being received from Ethernet the function of voice data.
Herein it should be noted that be provided with the utility model above-described embodiment two Ethernet interface Eth_0 and
Eth_1, for AE8, two Ethernet interfaces all export the voice data of CS5368, so two audios of Ethernet output
The content of data is identical, and the benefit that AE8 retains two Ethernet interfaces is：It is possible, firstly, to be made with an Ethernet interface
For the main delivery outlet of audio goes to drive audio amplifier, and voice data can be copied with another Ethernet interface a to monitoring
Room, such monitor room can just be monitored in real time；In addition, AE8 has the ability for carrying up to 256 tunnel audios in the future, and
And only with a netting twine concatenation speaker interface realization, the breaking audio amplifier that will all cause below of any one node for concatenating at this moment
Can not receive data；In order to solve this problem, two network interfaces output that AE8 retains can so constitute double when networking
To backup ring, two ports backup each other, and so long as not two ring simultaneous faults on intermediate node, voice data can just succeed
Transmission, so that for the robustness of system provides guarantee.In the test of current AE8/EA8, two Ethernet interfaces of AE8
Audio is exported simultaneously, and two Ethernet interfaces of EA8 receive voice data simultaneously, if AE8/EA8 linked with two netting twines,
When any ethernet line breaks down or when extracting, all without being affected, system can cut audio transmission automatically
Change on another normal network interface.Therefore, AE8 exports double audio by two network interfaces two effects：Monitor and standby
Part；EA8 can receive two sound source datas by two network interfaces, can reach the purpose of redundancy backup, whole such that it is able to make
System robustness is stronger, furthermore, it is possible to by control command control EA8, make its selection all the way audio output to DA.
Herein also, it should be noted that in the utility model above-described embodiment, the priority of Ethernet interface Eth0 is high
In Ethernet interface Eth1, that is to say, that if Ethernet interface Eth0 and Eth1 have normal data flow, EA8 selections
Voice data, only when Ethernet interface Eth0 failures do not have normal audio stream, EA8 just meetings are obtained from Ethernet interface Eth0
Ethernet interface Eth1 is switched to, voice data is obtained from Ethernet interface Eth1.
Optionally, in the utility model above-described embodiment, as shown in figure 3, processor 133 also includes：
3rd interface 37, is connected with first processing units 33, for receiving the key state information of outside input, and drives
LED is shown.
Specifically, the 3rd above-mentioned interface can be clock, reset, button, LED such as shows at the various signaling interfaces, the portion
Tap mouth is mainly gives FPGA offer clock and reset signal, and button and LED show and be the state verification side of providing of system
Just, such as in the communication process of AE8 and EA8, can be with by the way that whether the LED0 that EA8 by test button, is observed on AE8 lights
Judge whether ethernet communication is normal rapidly；Above-mentioned key state information can be that staff passes through external Key buttons, defeated
Whether the normal key-press status of test ethernet communication for entering, Key buttons are pressed and the correspondence two states information that is not pressed,
For example, Key buttons press corresponding key state information for 1, Key buttons are not pressed corresponding key state information for 0.
Two second interfaces 35 are additionally operable to output key status information.
In a kind of optional scheme, while AE8 transmits voice data every time, the state of the button that can all sample simultaneously is driven
The LED of dynamic AE8 is shown (press as bright, not by go out), and current LED state data are bundled into Ethernet data
EA8 is transferred to by Ethernet in the lump with audio signal in bag.EA8 is also received while Ethernet data bag is received
The key state information of AE8, EA8 is after unpack and obtaining key state information, it is possible to use the case status information is driven
The LED of dynamic EA8 is shown (press as bright, not by go out).
Herein it should be noted that if AE8/EA8 ethernet communications are normal, when Key buttons are pressed, AE8
LED with EA8 is lighted simultaneously, and when Key buttons are discharged, the LED of AE8 and EA8 is gone out with time-varying, therefore, it can lead to
Cross and display whether to change to judge the break-make of the Ethernet between AE8 and EA8 by Key buttons and the LED for observing EA8
Situation.
Through the above way, the key state information that equipment receives outside input is sent, is driven according to key state information
The LED of transmission equipment shown, while processing the first audio signal and key state information, obtains voice data
Bag；Receiving device is processed packets of audio data according to preset protocol, obtains key state information, and according to key-press status
The LED of information-driven receiving device is shown, so as to realize the ether Netcom tested between transmission equipment and receiving device
Whether letter is normal, lifts the accuracy and validity of Audio Signal Processing.
Optionally, in the utility model above-described embodiment, as shown in figure 3, processor 133 also includes：
4th interface 39, the first end of the 4th interface is connected with controller 311, and the second end of the 4th interface is processed with first
Unit 33 is connected, the control parameter for receiving controller output, wherein, control parameter at least includes：The transmission of physical address
Form, the form that sends is following one kind：Unicast fashion and the forms of broadcasting.
Specifically, above-mentioned controller can be above-mentioned with microcontroller (Micro Controller Unit's writes a Chinese character in simplified form)
The 4th interface can be MCU_SPI interfaces, in the design of FPGA, remain one and MCU communication SPI mouthful, at present, singly
Piece machine can also read the sound that FPGA is received by information such as the SPI mouthfuls of version numbers of reading FPGA by the SPI mouthfuls
Frequency evidence, and to data parsing so as to drive passage to show LED.Other single-chip microcomputer also controls the work shape of FPGA by the SPI
State, current controllable parameter has, and 1：When control FPGA sends packet, target MAC (Media Access Control) address is sent in the form of unicast
Or sent in the form of broadcasting.2：Whether using buffering area handoff algorithms, (i.e. whether receiving device uses FIFO to control FPGA
The method of caching).Further, retaining the SPI mouthfuls can realize the function of encryption of FPGA.
Herein it should be noted that in the scene that AE8 is only docked with EA8, all of AE8 can share a MAC ground
Location, all of EA8 can share another MAC Address, as long as AE8 and EA8 have different MAC Address, it becomes possible to ensure logical
Both sides' MAC Address of letter is differed, it is to avoid MAC conflicts.It is therefore possible to use toggle switch setting is AE8 or EA8, so that
Respective MAC Address is selected, and AE8 and EA8 both know about the MAC Address of other side, it is to avoid obtained by complex protocol before communication
The process of MAC is taken, the function of plug and play is realized.
But, in order to the audio amplifier in compatible future is concatenated, in the scene of EA8 series connection EA8, i.e. EA8 no longer only connects with AE8
Connect, EA8 is possible to connect EA8.If now all EA8 still share a MAC Address, two EA8 may result in when concatenating
MAC conflicts.If distributing a different MAC Address to each EA8, the both sides of concatenation are accomplished by passing through before a communication
The modes such as ARP protocol obtain the MAC Address of other side, do so will certainly cause the complication of whole system so that communication is prolonged
Greatly increase late, then cause the experience of plug and play to be deteriorated.In order to simplify this problem, EA8 can be transmitted using broadcast packet
Voice data, the step of obtaining to side mac address is just eliminated using broadcast packet so that data communication can set up at once, reach
To the effect of plug and play.
Optionally, in the utility model above-described embodiment, as shown in Fig. 2 ethernet controller 135 includes：
Second processing unit 1351, for processing voice data, obtains packets of audio data.
Specifically, above-mentioned second processing unit can be the processing unit in Ethernet protocol processing unit, or to sound
Frequency packet is processed, and obtains voice data.
5th interface 1353, is connected with second processing unit, for exporting packets of audio data or receiving packets of audio data.
Optionally, in the utility model above-described embodiment, the 5th interface is the RJ45 interfaces for carrying transformer.
In a kind of optional scheme, Ethernet protocol processing unit can the RJ45 interfaces by DM9000 and with transformer
Constitute, the voice data that FPGA is exported can be carried on Ethernet by the processing unit in Ethernet protocol processing unit
It is transmitted, finally from RJ45 interfaces, packets of audio data is transmitted to by EA8 equipment by ethernet line, EA8 equipment can passes through
RJ45 interfaces are unpacked packets of audio data by the processing unit in Ethernet protocol processing unit to packets of audio data
PFGA is transferred into voice data.
With reference to Fig. 4 to Figure 10, a kind of preferred embodiment of the utility model is described in detail.
As shown in figure 4, the processing system of audio signal can include that source of sound is simulated on 8 tunnels, AE8, EA8 and No. 8 loudspeaker are constituted,
AE8 and EA8 are the two ends of ethernet communication, and wherein AE8 is responsible for the audio signal of the simulation on 8 tunnels to be converted into data signal, and
Ethernet data bag is packaged into, the EA8 of distal end is transmitted to by Ethernet interface RJ45 and netting twine, EA8 is responsible for being received from Ethernet
Ethernet bag is taken, D/A converter module CS4382 is issued after unpacking and is converted into analog signal, be reduced into original audio signal.
AE8 it is main by：The AD conversion unit of audio, FPGA core core, Ethernet protocol processing unit is constituted, the voice data of AE8
It is that, from Audio to Ethernet Ethernet, the core devices of the AD conversion unit of audio are CS5368, and major function is 8
The input source of sound (analog signal) on road is AD converted, pick up simulation audio signal and be converted to numeral audio signal to
FPGA, current data signal using I2S forms interface standard, current I2S parameters are：48K sample rates, the sampling of 24bit
Precision；The major function of FPGA core core is to complete the digital audio and video signals of CS5368 outputs to the Ethernet data bag of DM9000
Between docking, management configuration CS5368/DM9000 etc., human/machine control interfaces, display interface etc. is the core list of whole project
Unit；The main devices of Ethernet protocol processing unit are DM9000, and the RJ45 interfaces with transformer, and the part is defeated by FPGA
The VoP for going out is carried on Ethernet and is transmitted, and finally from RJ45 interfaces, is passed audio signal by ethernet line
Give EA8 equipment.EA8 mainly have by：Ethernet protocol processing unit, FPGA core core, the D/A conversion unit of audio is constituted, this
In it should be noted that the voice data flow direction and AE8 of EA8 are just conversely, AE8 is to flow to Ethernet from Audio, and EA8 is
Audio is flowed to from Ethernet, the main devices of Ethernet protocol processing unit are DM9000, and the RJ45 with transformer connects
Mouthful.The part receives VoP from Ethernet, is transmitted to FPGA treatment；The major function of FPGA core core is to complete
The Ethernet data bag of DM9000 to the docking between CS4382, management configuration CS4382/DM9000 etc., human/machine control interfaces,
Display interface etc., is the core cell of whole project；The core devices of the D/A conversion unit of audio are CS4382, major function
It is that the digital audio and video signals on 8 tunnels are converted to analog signal by DA, is used to drive phonation unit to export audio.
As shown in figure 5, the external interface of FPGA is mainly made up of following 5 parts：Clock, resets, and button, LED shows
Etc. various signaling interfaces, the part of interface is mainly gives FPGA offer clock and reset signal, and button and LED show and be system
State verification provide convenient, such as in the communication process of AE8 and EA8, by test button, EA8 is observed by AE8
LED whether light and can rapidly judge whether ethernet communication normal；I2S interfaces (AE8/EA8), for AE8, the I2S
The voice data that interface CS5368 (CS5368 is AD conversion chip) comes, by internal bus from Ethernet Eth0 and
Eth1 is exported, the function that realization sends local I2S voice datas to Ethernet；For EA8, will be from by the I2S interfaces
The data is activation that Eth0 or Eth1 are received to the CS4382 audio DA chips on plate, by CS4382 complete digital-to-analogue conversion so as to
Generating unit is driven, so as to realize being received from Ethernet the function of voice data.I2S interfaces (AE8/EA8) support the modulus on 8 tunnels
Or digital-to-analogue conversion (way of support depends on the specification of AD/DA chips)；Eth_0 Ethernet interfaces；Eth_1 Ethernets connect
Mouthful, for AE8, the identical voice data of Eth1 outputs and Eth0, so as to provide monitoring or backup functionality.For EA8, when
During Eth0 Ethernet Transmissions, EA8 automatically switches to Eth1, voice data is received from Eth1, so as to realize the superfluous of Ethernet
Remaining backup, improves the robustness of whole system；MCU_SPI interfaces, in the design of FPGA, remain one and MCU and communicate
SPI mouthfuls, at present, single-chip microcomputer can also can be read by the SPI mouthfuls of information such as version number of reading FPGA by the SPI mouthful
The voice data that FPGA is received is taken, and to data parsing so as to drive passage to show LED.Other single-chip microcomputer also passes through the SPI
Controlling the working condition of FPGA, current controllable parameter has, and 1：When control FPGA sends packet, target MAC (Media Access Control) address is
Sent in the form of unicast or sent in the form of broadcasting.2：Whether control FPGA uses buffering area handoff algorithms, further
The function of the encryption of FPGA can also be realized.
As shown in fig. 6, clock, reset, button, LED show etc. that various signaling interfaces include following interface signal：OSC_
50m " the 50M clocks of external crystal-controlled oscillation；emclk：FPGA is exported to the clock of DM9000, and current DM9000 is brilliant using single 25M
Shake, it is no to use the signal；cpu_rstn：The reset signal of outside input, for the whole logic that resets；keys：Key-press input
Signal, at present, key [0] is for the reset of demo plates, and whether Key [1] normal for testing ethernet communication；LED：LED lamp,
Coordinate Key buttons, it is whether normal for testing ethernet communication；Seg：The driving pin of seven segment digital tubes, currently without using.
As shown in fig. 7, I2S interfaces (AE8/EA8) include following interface signal：ctl_cs1、ctl_clk、ctl_mosi、
ctl_miso：This four signals are SPI mouthfuls of the CPU configurations of CS5368/4382, it is also possible to as I2C mouthfuls of CPU configurations, mesh
Preceding CS5368/4382 is worked using the pattern matched somebody with somebody firmly；osc_12m288：The clock input of outside 12.288M crystal oscillators, this practicality is new
AE8/EA8 in type embodiment is operated in 48K using (non-USB mode) under the general mode of rate, so the crystal oscillator for needing is：
48K*256=12.288M；i2s_sclk：The bit clock of I2S, in order to support that multichannel, all of AD/DA are operated in slave pattern
Under, i.e. AD/DA is from outside fetch bit clock, so needing FPGA to export bit clock, multiple can be ensured by FPGA output bit clocks
The synchronization of module clock；i2s_lrck：I2S left and right acoustic channels select clock, in the utility model above-described embodiment, any one
I2S data wires are all 2 data of passage (stereo data in other words) of transmission, are represented by the level of i2s_lrck
L channel or R channel；I2s_lrck is exported, so as to ensure that multiple AD/DA can be synchronous as i2s_sclk by FPGA；
i2s_inout1：This is the data-signal of I2S, if AE8, the signal is input, and if EA8, the signal is output,
Each i2s_inout transmits 2 voice datas of sound channel, therefore the voice data of 8 passages only needs to 4 i2s_inout, i.e.,
I2s_inout1, i2s_inout2, i2s_inout3 and i2s_inout4.
As shown in figure 8, Ethernet interface Eth_0 can include following interface signal：Eth_0 is master ethernet interface,
On AE8, FPGA sends voice data by the interface to DM9000, and packet is sent eventually through RJ45；For EA8, FPGA
From the interface voice data, DA chips are finally issued.dm9000_int：The interrupt signal of DM9000, for EA8, whenever
When receiving new packet, will notify that FPGA has new packet to reach by drawing high the signal, FPGA takes packet away
Afterwards, the signal is removed by register.For AE8, the signal will not be driven high (because AE8 does not have packet to receive)
Need not process；dm9000_rst_n：The reset signal of DM9000, by undercuting, the signal resets to DM9000；
dm9000_cs_n：The chip selection signal of DM9000, by undercuting, the signal chooses DM9000；dm9000_cmd_n：Due to DM9000
There is no an address signal, actually address and data are multiplexings, accordingly, it would be desirable to signal identification be actually once data also
It is address.DM9000 is identified by the signal；dm9000_rd_n：The reading of DM9000 enables signal；dm9000_wr_n：
The write enable signal of DM9000；dm9000_data：The data-signal of DM9000, the signal is a multiplexed signals, first one
Individual multiplexing is the multiplexing of address and data, actually or and address data are identified by dm9000_cmd_n；Other one
Individual multiplexing is the multiplexing for being input into and exporting, and the write-in data and reading data of DM9000 are transmitted by the signal.
As shown in figure 9, Ethernet interface Eth_1 can include following interface signal：Eth_1 is Ethernet backup interface,
On AE8, while FPGA sends voice data to eth0, can make a copy for a to the interface, therefore the prison of audio can be realized
Listen or redundancy backup；For EA8, when eth0 open circuits, FPGA automatically switches to the interface voice data, so that
Realize the backup functionality of audio input.The interface signal and eth0 of eth1 are functionally identical, specific as follows：enetc_int：
The interrupt signal of DM9000, for EA8, whenever new packet is received, will notify that FPGA has by drawing high the signal
New packet is reached, and after FPGA takes packet away, the signal is removed by register.For AE8, the signal will not be driven high
(because AE8 does not have packet to receive) is need not process.enetc_rst_n：The reset signal of DM9000, by undercuting
The signal resets to DM9000；enetc_cs_n：The chip selection signal of DM9000, by undercuting, the signal chooses DM9000；
enetc_cmd_n：Because DM9000 does not have address signal, actually address and data is multiplexing, accordingly, it would be desirable to a letter
Or actually number identify data address.DM9000 is identified by the signal；enetc_rd_n：The reading of DM9000 makes
Can signal；enetc_wr_n：The write enable signal of DM9000；enetc_data：The data-signal of DM9000, the signal is one
Multiplexed signals, first one multiplexing is the multiplexing of address and data.And be identified by dm9000_cmd_n and be ground actually
Location or data；Another multiplexing is the multiplexing for being input into and exporting, and the write-in data and reading data of DM9000 all pass through
The signal is transmitted.
As shown in Figure 10, mcu_spi interfaces can include following interface signal：The interface be FPGA and single-chip microcomputer mcu it
Between communication interface.Current communication mode is that MCU is main equipment, and FPGA is slave unit.In addition, MCU can be with by the interface
The current voice data of each passage is read, the amplitude such that it is able to judge signal level then drives the LED level of each passage
Indicator lamp is shown.spi3_cs：The chip selection signal of SPI, is driven by main equipment MCU；spi3_sclk：The clock of SPI
Signal, is driven by main equipment MCU；spi3_mosi：The master output slave input signals of SPI, are set by master
Standby MCU is driven；spi3_miso：The master input slave output signals of SPI, are driven by main equipment FPGA
It is dynamic.
Herein also, it should be noted that 8 road simulated audio signals are by transmission equipment, being transferred to reception by Ethernet sets
It is standby, and 8 road simulated audio signals are reduced to, in whole processing procedure, the time delay of a total of 0.57ms or so, mainly by following three
Individual aspect is produced：
1st, 8 road simulated audio signals are converted to 8 railway digital audio signals by the AD conversion unit of AE8, such as table 1 below institute
Show, in the utility model above-described embodiment, sample frequency FS selects 48KHz, total time delay Total Delay=12 ÷ (48 ×
1000) s=0.25ms.
2nd, EA8 collects Ethernet data bag from Ethernet, and by AD conversion unit, by 8 railway digital audio signals
8 road simulated audio signals are converted to, as shown in table 2 below, in the utility model above-described embodiment, sample frequency FS is selected
48KHz, total time delay Total Delay=10.4 ÷ (48 × 1000) s=0.22ms.
3rd, AE8 is packed to digital audio and video signals, EA8 is unpacked to Ethernet data bag, and EA8 turns modulus
Simulated audio signal after changing is stored in FIFO cachings, produces the time delay of 0.1ms or so.
Table 1
Table 2
From the foregoing, it will be observed that compared with the existing solution by Ethernet transmission audio, using the above-mentioned implementation of the application
The scheme that example is provided, can reduce the processing delay of audio signal.
Embodiment 2
According to the utility model embodiment, there is provided a kind of embodiment of the transmission equipment of audio signal.
Figure 11 is a kind of schematic diagram of the transmission equipment of the audio signal according to the utility model embodiment, such as Figure 11 institutes
Show, the transmission equipment includes：
Digital analog converter 111, is connected with audio-source, for carrying out analog-to-digital conversion to the first audio signal for getting, obtains
To the second audio signal, wherein, the first audio signal is the audio signal waiting for transmission collected from audio-source, the first audio letter
Number be analog signal, the second audio signal be data signal.
Optionally, in the utility model above-described embodiment, the model CS5368 of digital analog converter.
Processor 113, is connected with digital analog converter, turns for according to preset format, entering row format to the first audio signal
Change, obtain voice data.
Optionally, in the utility model above-described embodiment, processor is FPGA.
Specifically, above-mentioned preset format can be I2S forms (Inter-IC Sound, integrated circuit built-in audio),
Be between digital audio-frequency apparatus voice data transmission and formulate transmission standard, in the utility model above-described embodiment, with
I2S parameters are：As a example by the sample rate of 48K and the sampling precision of 24bit, illustrate.
Ethernet controller 115, is connected with processor and receiving device respectively, for according to preset protocol, to audio number
According to being processed, packets of audio data is obtained, and send packets of audio data.
Optionally, in the utility model above-described embodiment, the model DM9000 of ethernet controller.
Specifically, the MAC Address due to including receiving device in packets of audio data, above-mentioned preset protocol can be
Mac-layer protocol.
Optionally, in the utility model above-described embodiment, send equipment in units of frame, at voice data
Reason.
Herein it should be noted that AE8 and EA8 are two pieces of independent veneers, although they are using the crystal oscillator of 12.288M
As the clock source of AD conversion unit (AD/DA), but, the frequency of the two crystal oscillators can not possibly be identical, between them
Necessarily there is certain difference, the size of this difference depends on the precision of crystal oscillator, wherein, the crystal oscillator precision used in audio is general
It is tens PPM (hundred a ten thousandths, Part Per Million's writes a Chinese character in simplified form).Two differences of crystal oscillator frequency can cause in communication
" slip ", solving the mode of this " slip " typically has control crystal oscillator frequency of oscillation so as to repair " slip ", or increases slow
The time that area is rushed to increase slip to cause and overflow, but each way has its respective advantage and disadvantage, than if any the frequency that causes shake
Swing fluctuation to increase, the communication delay that causes having is increased.Because the processing system that the utility model is provided is especially sensitive to time delay, institute
Can be made a call to by the way of an Ethernet data bag using a frame voice data, the delay of now Ethernet data bag deblocking is about
It is 2 frame data=2*1/48000=40us, wherein, the buffering area of voice data is not provided with receiving device.Without buffering
In the case of area, the probability that slip occurs can increase, but influence when there is slip to tonequality is very small, if receiving device
Crystal oscillator is faster than transmitting terminal, and receiving device can't wait the audio signal of transmission equipment, then the last audio of receiving device replay
Signal；If the clock ratio of receiving device sends, equipment is slow, receiving device is received from transmission equipment when slip occurs one
Individual audio signal is possible to also not using being just capped.
In a kind of optional scheme, AE8 mainly by the AD conversion unit (i.e. above-mentioned digital analog converter) of audio,
FPGA core core (i.e. above-mentioned processor) and Ethernet protocol processing unit (i.e. above-mentioned ethernet controller) are constituted, audio
Signal is from audio-source Audio to Ethernet Ethernet.The core devices of the AD conversion unit of audio are CS5368, main work(
Can be that the input source of sound (analog signal) on 8 tunnels is AD converted, pick up the audio signal of simulation and be converted to the audio of numeral
Signal is to FPGA；The major function of FPGA core core is to complete the digital audio and video signals of CS5368 outputs to the Ethernet of DM9000
Docking between packet, management configuration CS5368/DM9000 etc., human/machine control interfaces, display interface etc., are whole projects
Core cell；The main devices of Ethernet protocol processing unit are DM9000, and the voice data that the part exports FPGA is carried
It is transmitted on to Ethernet, packets of audio data is transmitted to EA8 equipment eventually through ethernet line.
By the utility model above-described embodiment, digital analog converter carries out modulus to the first audio signal for getting and turns
Change, obtain the second audio signal, processor enters row format conversion to the first audio signal according to preset format, obtains audio number
According to ethernet controller is processed voice data according to preset protocol, obtains packets of audio data, and send voice data
Bag, so as to realize the purpose to treatment and the transmission of audio signal.It is easily noted that, analog-digital converter believes the first audio
The second audio signal number is converted to, simulated audio signal is converted to digital audio and video signals, is difficult to receive in transmitting procedure by realization
Interference, includes the physical address of receiving device in packets of audio data, that is, send equipment and receiving device operates in MAC layer, no
IP address is needed, can be with plug and play, so as to the processing system for solving audio signal of the prior art configures complicated, it is impossible to
Accomplish the technical problem of plug and play.Therefore, the scheme for being provided by the utility model above-described embodiment, can reach and use habit
Similar to artificial line on used, configuration is convenient, with plug and play, and can reduce the effect of influence of the slip to audio signal.
Embodiment 3
According to the utility model embodiment, there is provided a kind of embodiment of the receiving device of audio signal.
Figure 12 is a kind of schematic diagram of the receiving device of the audio signal according to the utility model embodiment, such as Figure 12 institutes
Show, the receiving device includes：
Ethernet controller 121, is connected, for according to preset protocol, to the packets of audio data for receiving with the equipment of transmission
Processed, obtained voice data.
Optionally, in the utility model above-described embodiment, the model DM9000 of ethernet controller.
Specifically, the MAC Address due to including receiving device in packets of audio data, above-mentioned preset protocol can be
Mac-layer protocol.
Optionally, in the utility model above-described embodiment, send equipment in units of frame, at voice data
Reason.
Herein it should be noted that AE8 and EA8 are two pieces of independent veneers, although they are using the crystal oscillator of 12.288M
As the clock source of AD conversion unit (AD/DA), but, the frequency of the two crystal oscillators can not possibly be identical, between them
Necessarily there is certain difference, the size of this difference depends on the precision of crystal oscillator, wherein, the crystal oscillator precision used in audio is general
It is tens PPM (hundred a ten thousandths, Part Per Million's writes a Chinese character in simplified form).Two differences of crystal oscillator frequency can cause in communication
" slip ", solving the mode of this " slip " typically has control crystal oscillator frequency of oscillation so as to repair " slip ", or increases slow
The time that area is rushed to increase slip to cause and overflow, but each way has its respective advantage and disadvantage, than if any the frequency that causes shake
Swing fluctuation to increase, the communication delay that causes having is increased.Because the processing system that the utility model is provided is especially sensitive to time delay, institute
Can be made a call to by the way of an Ethernet data bag using a frame voice data, the delay of now Ethernet data bag deblocking is about
It is 2 frame data=2*1/48000=40us, wherein, the buffering area of voice data is not provided with receiving device.Without buffering
In the case of area, the probability that slip occurs can increase, but influence when there is slip to tonequality is very small, if receiving device
Crystal oscillator is faster than transmitting terminal, and receiving device can't wait the audio signal of transmission equipment, then the last audio of receiving device replay
Signal；If the clock ratio of receiving device sends, equipment is slow, receiving device is received from transmission equipment when slip occurs one
Individual audio signal is possible to also not using being just capped.
Processor 123, is connected with ethernet controller, for according to preset format, entering row format conversion to voice data,
Obtain the second audio signal.
Optionally, in the utility model above-described embodiment, processor is FPGA.
Specifically, above-mentioned preset format can be I2S forms (Inter-IC Sound, integrated circuit built-in audio),
Be between digital audio-frequency apparatus voice data transmission and formulate transmission standard, in the utility model above-described embodiment, with
I2S parameters are：As a example by the sample rate of 48K and the sampling precision of 24bit, illustrate.
Digital analog converter 125, is connected with processor and audio output unit respectively, for entering line number to the second audio signal
Mould is changed, and obtains the first audio signal, and exports the first audio signal, wherein, the first audio signal is analog signal, the second sound
Frequency signal is data signal.
Optionally, in the utility model above-described embodiment, the model CS4382 of digital analog converter.
In a kind of optional scheme, EA8 mainly by Ethernet protocol processing unit (i.e. above-mentioned ethernet controller),
The AD conversion unit (i.e. above-mentioned digital analog converter) of FPGA core core (i.e. above-mentioned processor) and audio is constituted, audio letter
Number flow direction and AE8 just conversely, from Ethernet Ethernet to audio-source Audio.Ethernet protocol processing unit it is main
Device is DM9000, and the part receives VoP from Ethernet, is transmitted to FPGA treatment；The main work(of FPGA core core
Can be the Ethernet data bag for completing DM9000 to the docking between CS4382, management configuration CS4382/DM9000 etc., man-machine control
Interface processed, display interface etc., are the core cells of whole project；The core devices of the D/A conversion unit of audio are CS4382,
Major function is that the digital audio and video signals on 8 tunnels are converted to analog signal by DA, is used to drive phonation unit to export audio.
Herein it should be noted that in the processing procedure of audio signal, it is that process is reciprocal to send equipment and receiving device
Two equipment, two equipment all include AD conversion unit, FPGA and Ethernet protocol processing unit, are sending device A E8
In, the flow direction of audio signal is that, from audio-source to Ethernet, and in receiving device EA8, the flow direction of audio signal is from ether
Net is to audio output unit.
In another optional scheme, in order to solve the problems, such as two slips of free oscillation crystal oscillator, in the utility model
Method that can also be using being cached using FIFO, EA8, can be with after each the Ethernet data bag that will be received is unpacked
It is stored in FIFO, if the clock cycle for reading FIFO is slower than the clock cycle write, the voice data deposited in FIFO can tire out
Product, when the voice data accumulation deposited in FIFO is to certain depth, the FPGA inside EA8 can be judged, and taken and lost
The measure of bag.
By the utility model above-described embodiment, send equipment and obtain the first audio signal, the first audio signal is carried out
Treatment, obtains packets of audio data, packets of audio data is sent to receiving device, so as to realize the treatment and transmission to audio signal
Purpose.It is easily noted that, the first audio signal is converted to the second audio signal by analog-digital converter, realizes analog audio
Frequency signal is converted to digital audio and video signals, is difficult to be disturbed in transmitting procedure, and receiving device is included in packets of audio data
Physical address, that is, send equipment and receiving device operate in MAC layer, it is not necessary to IP address, can be with plug and play, so as to solve
The processing system configuration of audio signal of the prior art is complicated, it is impossible to accomplish the technical problem of plug and play.Therefore, by this
The scheme that utility model above-described embodiment is provided, can reach similar to artificial line in use habit, and configuration is convenient, can insert
Use, and reduce the effect of influence of the slip to audio signal.
By the utility model above-described embodiment, ethernet controller according to preset protocol, to the voice data for receiving
Bag is processed, and obtains voice data, and processor enters row format conversion to voice data according to preset format, obtains the second sound
Frequency signal, digital analog converter carries out digital-to-analogue conversion to the second audio signal, obtains the first audio signal, and export the first audio letter
Number, so as to realize the purpose to treatment and the transmission of audio signal.It is easily noted that, analog-digital converter believes the first audio
The second audio signal number is converted to, simulated audio signal is converted to digital audio and video signals, is difficult to receive in transmitting procedure by realization
Interference, includes the physical address of receiving device in packets of audio data, that is, send equipment and receiving device operates in MAC layer, no
IP address is needed, can be with plug and play, so as to the processing system for solving audio signal of the prior art configures complicated, it is impossible to
Accomplish the technical problem of plug and play.Therefore, the scheme for being provided by the utility model above-described embodiment, can reach and use habit
Similar to artificial line on used, configuration is convenient, with plug and play, and can reduce the effect of influence of the slip to audio signal.It is above-mentioned
The utility model embodiment sequence number is for illustration only, and the quality of embodiment is not represented.
In above-described embodiment of the present utility model, the description to each embodiment all emphasizes particularly on different fields, in certain embodiment
Without the part described in detail, the associated description of other embodiment is may refer to.
The above is only preferred embodiment of the present utility model, it is noted that for the common skill of the art
For art personnel, on the premise of the utility model principle is not departed from, some improvements and modifications can also be made, these improve and
Retouching also should be regarded as protection domain of the present utility model.
Claims (14)
1. a kind of processing system of audio signal, it is characterised in that including：
Audio-source, for gathering the first audio signal waiting for transmission；
Transmission equipment, is connected with the audio-source, for processing first audio signal, obtains packets of audio data,
Wherein, the packets of audio data at least includes：The physical address of first audio signal and receiving device；
The receiving device, is connected, with the transmission equipment by netting twine for receiving the packets of audio data.
2. system according to claim 1, it is characterised in that the transmission equipment includes：
Digital analog converter, for carrying out analog-to-digital conversion to the first audio signal, obtains the second audio signal, wherein, described first
Audio signal is the audio signal waiting for transmission collected from audio-source, and first audio signal is analog signal, described the
Two audio signals are data signal；
Processor, is connected with the digital analog converter, turns for according to preset format, entering row format to first audio signal
Change, obtain voice data；
Ethernet controller, is connected with the processor, for according to preset protocol, processing the voice data, obtains
To the packets of audio data, and send the packets of audio data.
3. system according to claim 1, it is characterised in that
The receiving device is additionally operable to process the packets of audio data, obtains first audio signal；
The system also includes：Audio output unit, is connected with the receiving device, for exporting first audio signal.
4. system according to claim 3, it is characterised in that the receiving device includes：
Ethernet controller, for according to preset protocol, processing the packets of audio data, obtains the voice data；
Processor, is connected with the ethernet controller, turns for according to preset format, entering row format to the voice data
Change, obtain the second audio signal；
Digital analog converter, is connected with the processor, for carrying out digital-to-analogue conversion to second audio signal, obtains described
One audio signal.
5. the system according to claim 2 or 4, it is characterised in that the processor includes：
First interface, the first end of the first interface is connected with the digital analog converter；
First processing units, are connected with the second end of the first interface；
Two second interfaces, the first end of each second interface is connected with the processing unit, and the of each second interface
Two ends are connected with the ethernet controller.
6. system according to claim 5, it is characterised in that the processor also includes：
3rd interface, is connected with the first processing units, for receiving the key state information of outside input, and drives LED
Lamp is shown；
Described two second interfaces are additionally operable to export the key state information.
7. system according to claim 5, it is characterised in that the processor also includes：
4th interface, the first end of the 4th interface is connected with controller, second end and described first of the 4th interface
Processing unit is connected, the control parameter for receiving the controller output, wherein, the control parameter at least includes：It is described
The transmission form of physical address, the transmission form is following a kind of：Unicast fashion and the forms of broadcasting.
8. system according to claim 5, it is characterised in that the processor is FPGA.
9. the system according to claim 2 or 4, it is characterised in that the ethernet controller includes：
Second processing unit, for processing the voice data, obtains the packets of audio data, or to the audio number
Processed according to bag, obtained the voice data；
5th interface, is connected with the second processing unit, for exporting the packets of audio data or receiving the voice data
Bag.
10. system according to claim 9, it is characterised in that the model DM9000 of the ethernet controller.
11. systems according to claim 9, it is characterised in that the 5th interface is the RJ45 interfaces for carrying transformer.
12. system according to claim 2 or 4, it is characterised in that the model CS5368 of the digital analog converter or
CS4382。
A kind of transmission equipment of 13. audio signals, it is characterised in that including：
Digital analog converter, is connected with audio-source, for carrying out analog-to-digital conversion to the first audio signal for getting, obtains the second sound
Frequency signal, wherein, first audio signal is the audio signal waiting for transmission collected from audio-source, the first audio letter
Number be analog signal, second audio signal be data signal；
Processor, is connected with the digital analog converter, turns for according to preset format, entering row format to first audio signal
Change, obtain voice data；
Ethernet controller, is connected with the processor and receiving device respectively, for according to preset protocol, to the audio number
According to being processed, packets of audio data is obtained, and send the packets of audio data.
A kind of 14. receiving devices of audio signal, it is characterised in that including：
Ethernet controller, is connected with the equipment of transmission, for according to preset protocol, at the packets of audio data that receives
Reason, obtains the voice data；
Processor, is connected with the ethernet controller, turns for according to preset format, entering row format to the voice data
Change, obtain the second audio signal；
Digital analog converter, is connected with the processor and audio output unit respectively, for being carried out to second audio signal
Digital-to-analogue conversion, obtains the first audio signal, and exports first audio signal, wherein, first audio signal is simulation
Signal, second audio signal is data signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621174907.0U CN206226695U (en) | 2016-10-26 | 2016-10-26 | The system and transmission equipment and receiving device of audio signal |
Applications Claiming Priority (1)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106331955A (en) * | 2016-10-26 | 2017-01-11 | 深圳市米尔声学科技发展有限公司 | Audio signal processing method, device and system, sending equipment and receiving equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106331955A (en) * | 2016-10-26 | 2017-01-11 | 深圳市米尔声学科技发展有限公司 | Audio signal processing method, device and system, sending equipment and receiving equipment |
| CN106331955B (en) * | 2016-10-26 | 2022-07-26 | 深圳市米尔声学科技发展有限公司 | Audio signal processing method, device and system, transmitting equipment and receiving equipment |
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