CN106603122A - Audio transmission device and system based on power line, and networking method - Google Patents
Audio transmission device and system based on power line, and networking method Download PDFInfo
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- CN106603122A CN106603122A CN201610976335.6A CN201610976335A CN106603122A CN 106603122 A CN106603122 A CN 106603122A CN 201610976335 A CN201610976335 A CN 201610976335A CN 106603122 A CN106603122 A CN 106603122A
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- audio transmission
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 79
- 230000006855 networking Effects 0.000 title claims abstract description 61
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000005236 sound signal Effects 0.000 claims abstract description 27
- 238000012545 processing Methods 0.000 claims abstract description 21
- 230000001427 coherent effect Effects 0.000 claims description 20
- 230000005611 electricity Effects 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
- H04B3/542—Systems for transmission via power distribution lines the information being in digital form
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
- G10L19/04—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques
- G10L19/16—Vocoder architecture
- G10L19/167—Audio streaming, i.e. formatting and decoding of an encoded audio signal representation into a data stream for transmission or storage purposes
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Computational Linguistics (AREA)
- Health & Medical Sciences (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
The present invention discloses an audio transmission device and system based on a power line, and a networking method. The audio transmission device comprises a control unit, a user input/output interface, an audio processing unit, a programmable logic gate array, a power line modem and a power management unit. The control unit receives a control instruction through the user input/output interface; the programmable logic gate array encodes the control correlation signals and/or audio signals, then outputs the control correlation signals and/or audio signals to the power line modem for modulation, and uploads the modulated control correlation signals and/or audio signals on the direct current supple line for transmission; the power line modem obtains signals from the direct current supple line and outputs the signals after modulation to the programmable logic gate array to obtain the audio signals and/or control correlation signals.; and the power management unit accesses the direct current supple line for supplying power for the audio transmission device. The audio transmission device is suitable for transmission of audio signals and control correlation signals through the direct current supple line.
Description
Technical field
The present invention relates to audio transmission techniques field, more particularly, to it is a kind of based on the audio transmission device of power line,
A kind of audio transmission system based on power line and a kind of network-building method.
Background technology
With the development of technology of Internet of things, user may wish to be communicated between multiple stereo sets, enter one
Step can realize collaborative work, general by netting twine or the mode such as wireless is linked into each stereo set together in prior art
In one network, therefore in addition to the supply lines of stereo set, in addition it is also necessary to such as equipment of netting twine, route, relaying etc, lead
Cause system architecture complicated, implementation cost and later maintenance cost are higher.
Power line carrier, PLC is the distinctive communication mode of power system, and maximum feature is need not again to set up network, is led to
Crossing power line carries out data transfer.Therefore, it is necessary to propose a kind of audio transmission scheme suitable for power line carrier, PLC.
The content of the invention
It is an object of the present invention to provide a kind of audio transmission device, to realize being provided based on the audio transmission of power line
Hardware foundation.
According to the first aspect of the invention, it is proposed that a kind of audio transmission device based on power line, including control unit,
User input output interface, audio treatment unit, programmable gate array, power line modem and power management
Unit；
Described control unit, for by the control instruction of the user input output interface receive user；
The programmable gate array, for the control coherent signal that exports described control unit and/or the sound
The coding audio signal of frequency processing unit output, the signal output that coding is obtained is to the power line modem；
The power line modem, for being modulated to the signal for obtaining that encodes, by the signal loading after modulation to institute
State and be transmitted in direct current supply line；
The power line modem, is additionally operable to signal be received from the direct current supply line and is demodulated, and will solve
The signal output that tune is obtained is to the programmable gate array；The programmable gate array, is additionally operable to the demodulation
The signal for obtaining is decoded to obtain audio signal and/or control coherent signal, by the audio signal that obtains of decoding export to
The audio treatment unit, the control coherent signal that decoding is obtained is exported to described control unit；
The PMU, is the audio transmission dress for accessing the direct current that the direct current supply line is provided
Put power supply.
Alternatively, also including interference filter, the direct current that the direct current supply line is provided passes through the interference filter
After access the PMU.
Alternatively, the audio transmission device also includes audio input interface and audio output interface, the audio frequency process
Unit includes audio codec, the audio input interface and the audio output interface respectively with the audio codec
Connection.
Alternatively, the audio treatment unit also include digital signal processor, the digital signal processor respectively with
The audio codec and the programmable gate array connect.
Alternatively, the digital signal processor and the programmable gate array realize connection by I2S interfaces.
Alternatively, the audio transmission device is audio amplifier.
According to the second aspect of the invention, it is proposed that a kind of audio transmission system based on power line,
According to the third aspect of the invention we, it is proposed that a kind of network-building method, in being implemented on aforementioned audio Transmission system,
The instruction for being set to search pattern or call model that the audio transmission device receive user sends, itself is set
It is set to corresponding pattern；
Audio transmission device in call model broadcast networking solicited message in direct current supply line, the networking request
Comprising the address of the audio transmission device in call model in information；
Apparatus for processing audio in search pattern itself will be set to main equipment, monitor direct current supply line to obtain networking
Solicited message, it is determined whether and to send the audio transmission device networking of the networking solicited message, if it is determined that networking, then lead to
Cross the direct current supply line and send networking agreement letter to corresponding audio transmission device according to the address in the networking solicited message
Breath, comprising the address of the apparatus for processing audio in search pattern in the networking approval information；
Audio transmission device in call model itself will be set to from equipment after networking approval information is received,
Address and corresponding apparatus for processing audio networking according to networking approval information, and in networking backed off after random call model.
Alternatively, the apparatus for processing audio in search pattern to get and point out user after networking solicited message, according to
The control instruction of family input determines whether to and sends the audio transmission device networking of the networking solicited message.
Alternatively, the audio transmission device from into search pattern when start timing, if the time is more than default group
The net time, then terminate the monitoring work, and exit search pattern.
One beneficial effect of the present invention is that audio transmission device is to transmit audio signal and control by direct current supply line
Coherent signal processed provides hardware foundation, it is not necessary to sets up network again, implements relatively simple.Alternatively, this
Bright network-building method, conveniently and efficiently can realize the networking of audio transmission device using power carrier.
By referring to the drawings to the present invention exemplary embodiment detailed description, the present invention further feature and its
Advantage will be made apparent from.
Description of the drawings
It is combined in the description and the accompanying drawing of the part that constitutes specification shows embodiments of the invention, and even
It is used to together explain the principle of the present invention with its explanation.
Fig. 1 is the block diagram of audio transmission device provided in an embodiment of the present invention.
Fig. 2 is the sequential chart of I2S protocol specifications in prior art.
Fig. 3 is programmable gate array provided in an embodiment of the present invention and digital signal processor, the company of control unit
Connect schematic diagram.
Fig. 4 is the flow chart of network-building method provided in an embodiment of the present invention.
Specific embodiment
Describe the various exemplary embodiments of the present invention in detail now with reference to accompanying drawing.It should be noted that：Unless had in addition
Body illustrates that the part and the positioned opposite of step, numerical expression and numerical value for otherwise illustrating in these embodiments does not limit this
The scope of invention.
It is below illustrative to the description only actually of at least one exemplary embodiment, never as to the present invention
And its any restriction applied or use.
For technology, method and apparatus may be not discussed in detail known to person of ordinary skill in the relevant, but suitable
In the case of, the technology, method and apparatus should be considered a part for specification.
In all examples shown here and discussion, any occurrence should be construed as merely exemplary, and not
It is as restriction.Therefore, other examples of exemplary embodiment can have different values.
It should be noted that：Similar label and letter represents similar terms in following accompanying drawing, therefore, once a certain Xiang Yi
It is defined in individual accompanying drawing, then it need not be further discussed in subsequent accompanying drawing.
Audio transmission device provided in an embodiment of the present invention and system are illustrated with reference to Fig. 1, using power carrier audio frequency is realized
Transmission：
Exchange turns DC output unit and is connected with the live wire 10 and zero line 20 of electric power network, is gone out directly by direct current supply line 30
Stream electricity, arranges interference filter 202 and circuit is filtered in direct current supply line 30, reduce electromagnetic interference factor to power carrier
The impact of transmission signal.
Audio transmission device 100 is powered by direct current supply line 30, and in audio transmission device 100 interference filter is additionally provided with
109 and PMU 11, the direct current that direct current supply line 30 is provided accesses electricity after the filtering interfering of interference filter 109
Direct current is converted to source control unit 11, PMU 11 each operational module institute for being suitable for audio transmission device 100
Required voltage, is that each operational module is powered.
The operational module of audio transmission device 100 includes：Control unit 101, user input output interface 102, multichannel sound
Frequency signal output interface 103, multipath audio signal input interface 104, audio codec 105, digital signal processing unit
106th, programmable gate array 107, power line modem 108.Audio transmission device 100 can be, for example, audio amplifier, work
Making module also includes loudspeaker, power amplifier etc..
Control unit 101 can pass through the control instruction of the receive user of user input output interface 102, and defeated to user
Go out information.User input output interface 102 is integrated in Fig. 1, in other embodiments, or independent user is defeated
Enter output interface and independent user's output interface, control unit is referred to by the control of user input output interface receive user
Order.Control unit 101 can be with output control coherent signal to programmable gate array 107
Give from the coded transmission of audio signal Jing audio codec 105 of the input of MCVF multichannel voice frequency input signal interface 103
Digital signal processor 106, is further processed by digital signal processor 106, for example, carry out equilibrium treatment to audio signal
Or stereo process.Digital signal processor 106 is by the audio signal output after process to programmable gate array.
In once transmitting, only control coherent signal or audio signal transmission may be needed, it is also possible to while there is control
Coherent signal and audio signal need transmission.The control coherent signal that programmable gate array 107 is exported to control unit 101
And/or the coding audio signal of the output of digital signal processor 106, the signal output that coding is obtained is to power line modulation
Demodulator 108, the signal obtained by 108 pairs of codings of power line modem is modulated, and the signal coupling after modulation is added
It is downloaded in direct current supply line 30 and is transmitted.
On the other hand, power line modem 108 obtains signal from direct current supply line 30 and is demodulated, and will demodulate
The signal output for obtaining to programmable gate array 107, the signal obtained by 107 pairs of demodulation of programmable gate array are carried out
Decoding is exported the audio signal that decoding is obtained to digital signal processor with obtaining audio signal and/or control coherent signal
106, the control coherent signal that decoding is obtained is exported to control unit 101.Digital signal processor 106 is by the audio frequency for receiving
Signal is sent to audio codec 105 and carries out encoding and decoding, then outwards defeated by multipath audio signal output interface 103 again
Go out.
In the present invention, from programmable gate array chip 107 respectively with control unit 101 and digital signal processor
106 connections, when simultaneous transmission control coherent signal and audio signal is needed, can enter to controlling coherent signal and audio signal
The encoding and decoding of row one are processed (referring to aforementioned two sections of contents) so that audio transmission device can simultaneously be passed by direct current supply line
Defeated audio signal and control coherent signal.
Digital audio interface between common chip is I2S interfaces, the sequential for I2S protocol specifications shown in Figure 2
Figure, WS represents left and right acoustic channels, and for the data of switching right and left sound channel, WS is that " 1 " represents that what is transmitted is the data of R channel,
WS is that " 0 " represents that what is transmitted is the data of L channel；BCK represents bit clock；DATA represents voice data.Most
In digital audio system, communicated using 32 I2S, when WS is " 0 " or " 1 ", respectively there are 32 bit clocks on BCK, but on DATA
32 positions in only 24 significance bits, 1 sync bit, remaining 7 positions are simultaneously not used.It is shown in Figure 3, the present invention's
In one embodiment, the I2S interfaces of digital signal processor 106 and the I2S interfaces of programmable gate array chip 107 connect
Connect, between the two audio signal is transmitted based on I2S bus protocols.In one embodiment of the invention, FPGA gate array
Row 107 are filled into coherent signal is controlled on above-mentioned 7 positions do not used so that all the way I2S signals can both transmit digital sound
Frequently, control coherent signal can be transmitted again.In one embodiment of the invention, control unit 101 and FPGA gate array
Coherent signal is controlled based on spi bus protocol transmission between row chip 107.
Another feature of programmable gate array chip can be by programming realization and multi-channel sampling rate be more than
The DAB input and output of 48KHz carry out parallel processing.Compared to programmable gate array chip, monokaryon embedded processing
Device can only simultaneously process DAB input and output all the way, and be difficult to process the digital audio stream of more than 48KHz, and multinuclear is embedded
Processor can realize MCVF multichannel voice frequency input and output, but software and hardware realizes that difficulty is much larger than programmable gate array.
In the audio transmission system based on power line, at least two aforementioned audio transmitting devices 100 should be included, and
All audio frequency transmitting device 100 is connected in same direct current supply line 30.
Network-building method provided in an embodiment of the present invention is introduced with reference to Fig. 4, the network-building method is implemented on aforementioned based on power line
Audio transmission system in, comprise the following steps：
The instruction for being set to search pattern or call model that S1, audio transmission device receive user send, itself is set
It is set to corresponding pattern.
S2, the broadcast networking solicited message in direct current supply line of the audio transmission device in call model, networking request
Comprising the address of the audio transmission device in call model in information；Apparatus for processing audio in search pattern by itself
Main equipment is set to, monitors direct current supply line to obtain networking solicited message.
S3, the apparatus for processing audio in search pattern are got after networking request, it is determined whether and to send the networking
The audio transmission device networking of solicited message, if it is determined that networking, then by direct current supply line according to the networking solicited message
In address to corresponding audio transmission device send networking approval information, in networking approval information comprising should be in search pattern
Apparatus for processing audio address.
S4, the audio transmission device in call model itself will be set to from setting after networking approval information is received
It is standby, according to address and the corresponding apparatus for processing audio networking of networking approval information, and in networking backed off after random call model.
In step s 4, once in the audio transmission device networking success of call model, just exiting call model so that
One can only connect to a main equipment from equipment.
Alternatively, in step s3, the apparatus for processing audio in search pattern gets and pointed out after networking solicited message
User, determines whether to and sends the audio transmission device networking of the networking solicited message according to the control instruction of user input.
Alternatively, for the apparatus for processing audio for being arranged to search pattern, just open when from the beginning into search pattern
Beginning timing, if the time exceedes the default networking time, terminates to monitor work, and exits search pattern, and the networking time can
Set with the instruction according to user input.
Alternatively, for the apparatus for processing audio for being arranged to call model, just open when from the beginning into call model
Beginning timing, if within the default networking time, being not received by the networking agreement letter that any audio transmission device is sent
Breath, just exits call model, the networking time can be set according to the instruction of user input.
Alternatively, after networking success, apparatus for processing audio can point out user's group by voice or indicator lamp mode
Net successfully.
One beneficial effect of the present invention is that audio transmission device is to transmit audio signal and control by direct current supply line
Coherent signal processed provides hardware foundation, it is not necessary to sets up network again, implements relatively simple.Alternatively, this
Bright network-building method, conveniently and efficiently can realize the networking of audio transmission device using power carrier.
Although being described in detail to some specific embodiments of the present invention by example, the skill of this area
Art personnel it should be understood that example above is merely to illustrate, rather than in order to limit the scope of the present invention.The skill of this area
Art personnel to above example it should be understood that can modify without departing from the scope and spirit of the present invention.This
Bright scope is defined by the following claims.
Claims (10)
1. a kind of audio transmission device based on power line, it is characterised in that including control unit, user input output interface,
Audio treatment unit, programmable gate array, power line modem and PMU；
Described control unit, for by the control instruction of the user input output interface receive user；
The programmable gate array, at the control coherent signal that exports described control unit and/or the audio frequency
The coding audio signal of reason unit output, the signal output that coding is obtained is to the power line modem；It is described
Power line modem, for being modulated to the signal that obtains of encoding, by the signal loading after modulation to it is described directly
It is transmitted on stream supply lines；
The power line modem, is additionally operable to signal be received from the direct current supply line and is demodulated, and will demodulate
The signal output for arriving is to the programmable gate array；The programmable gate array, is additionally operable to obtain the demodulation
Signal decoded to obtain audio signal and/or control coherent signal, the audio signal that obtains of decoding is exported to described
Audio treatment unit, the control coherent signal that decoding is obtained is exported to described control unit；
The PMU, is that the audio transmission device is supplied for accessing the direct current that the direct current supply line is provided
Electricity.
2. audio transmission device according to claim 1, it is characterised in that also including interference filter, the direct current is supplied
The direct current that electric wire is provided accesses the PMU after the interference filter.
3. audio transmission device according to claim 1, it is characterised in that the audio transmission device also includes that audio frequency is defeated
Incoming interface and audio output interface, the audio treatment unit includes audio codec, the audio input interface and described
Audio output interface is connected respectively with the audio codec.
4. audio transmission device according to claim 3, it is characterised in that the audio treatment unit also includes numeral letter
Number processor, the digital signal processor is connected respectively with the audio codec and the programmable gate array.
5. audio transmission device according to claim 4, it is characterised in that the digital signal processor and described compile
Journey logic gate array realizes connection by I2S interfaces.
6. audio transmission device according to claim 1, it is characterised in that the audio transmission device is audio amplifier.
7. a kind of audio transmission system based on power line, it is characterised in that arbitrary according to claim 1-6 including at least two
Audio transmission device described in, and all the audio transmission device is connected in same direct current supply line.
8. a kind of network-building method, in being implemented on audio transmission system according to claim 7, it is characterised in that
The instruction for being set to search pattern or call model that the audio transmission device receive user sends, itself is arranged to
Corresponding pattern；
Audio transmission device in call model broadcast networking solicited message in direct current supply line, the networking solicited message
In comprising this in call model audio transmission device address；
Apparatus for processing audio in search pattern itself will be set to main equipment, monitor direct current supply line to obtain networking request
Information, it is determined whether and to send the audio transmission device networking of the networking solicited message, if it is determined that networking, then by institute
State direct current supply line and send networking approval information, institute to corresponding audio transmission device according to the address in the networking solicited message
State in networking approval information comprising the address of the apparatus for processing audio in search pattern；
Audio transmission device in call model itself will be set to from equipment after networking approval information is received, according to
The address of networking approval information and corresponding apparatus for processing audio networking, and in networking backed off after random call model.
9. network-building method according to claim 8, it is characterised in that the apparatus for processing audio in search pattern gets
User is pointed out after networking solicited message, the networking solicited message is determined whether to and sent according to the control instruction of user input
Audio transmission device networking.
10. network-building method according to claim 8, it is characterised in that the audio transmission device is from entering search pattern
When start timing, if the time exceedes the default networking time, terminate the monitoring work, and exit search pattern.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610976335.6A CN106603122A (en) | 2016-11-07 | 2016-11-07 | Audio transmission device and system based on power line, and networking method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610976335.6A CN106603122A (en) | 2016-11-07 | 2016-11-07 | Audio transmission device and system based on power line, and networking method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106603122A true CN106603122A (en) | 2017-04-26 |
Family
ID=58590070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610976335.6A Pending CN106603122A (en) | 2016-11-07 | 2016-11-07 | Audio transmission device and system based on power line, and networking method |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107948855A (en) * | 2017-11-24 | 2018-04-20 | 海尔优家智能科技（北京）有限公司 | A kind of method and apparatus that audio signal is transmitted by power cord |
| CN113141561A (en) * | 2020-01-19 | 2021-07-20 | 神讯电脑(昆山)有限公司 | Device for realizing long-distance audio signal playing |
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| EP2958273A1 (en) * | 2013-02-13 | 2015-12-23 | Panasonic Intellectual Property Management Co., Ltd. | Power line carrier communication terminal and meter reading terminal |
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| TW201328252A (en) * | 2011-12-30 | 2013-07-01 | Ind Tech Res Inst | Master device, slave device, and methods thereof |
| EP2958273A1 (en) * | 2013-02-13 | 2015-12-23 | Panasonic Intellectual Property Management Co., Ltd. | Power line carrier communication terminal and meter reading terminal |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107948855A (en) * | 2017-11-24 | 2018-04-20 | 海尔优家智能科技（北京）有限公司 | A kind of method and apparatus that audio signal is transmitted by power cord |
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